:root {
  --bg: #f5f7fb;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-solid: #ffffff;
  --ink: #1f2a3a;
  --muted: #66758a;
  --line: rgba(76, 100, 132, 0.18);
  --blue: #3a78d8;
  --blue-deep: #245bb0;
  --cyan: #6ad6ff;
  --shadow: 0 18px 44px rgba(25, 43, 76, 0.12);
  --radius: 22px;
  --header-h: 120px;
}

body.is-dark {
  --bg: #07111f;
  --panel: rgba(12, 25, 43, 0.86);
  --panel-solid: #0d1b2f;
  --ink: #eef6ff;
  --muted: #9fb0c6;
  --line: rgba(168, 204, 255, 0.16);
  --blue: #69a8ff;
  --blue-deep: #377de0;
  --shadow: 0 18px 44px rgba(0, 0, 0, 0.34);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(106, 214, 255, 0.20), transparent 32%),
    radial-gradient(circle at 90% 12%, rgba(58, 120, 216, 0.18), transparent 28%),
    var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
}

button, input, select { font: inherit; }

.app-shell {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  padding: 18px;
  gap: 14px;
}
/* v0.25 layout grouping */
.app-header,
.workspace,
.legal-footer {
  width: 100%;
  max-width: 1388px;
  margin-left: auto;
  margin-right: auto;
}


.app-header {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto auto;
  column-gap: 1rem;
  min-height: var(--header-h);
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255,255,255,0.92), rgba(235,244,255,0.72));
  box-shadow: var(--shadow);
  overflow: hidden;
}

body.is-dark .app-header {
  background: linear-gradient(135deg, rgba(16,32,55,0.94), rgba(9,18,32,0.78));
}

.title-block { min-width: 0; }

.eyebrow, .panel-kicker {
  margin: 0 0 4px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1, h2, p { margin-top: 0; }

h1 {
  margin-bottom: 7px;
  font-size: clamp(1.55rem, 3vw, 2.4rem);
  line-height: 1.05;
}

.lead {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.6;
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: start;
}

.ghost-button, .primary-button, .accent-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.ghost-button {
  padding: 8px 12px;
  color: var(--ink);
  background: rgba(255,255,255,0.48);
}

body.is-dark .ghost-button { background: rgba(255,255,255,0.06); }

.ghost-button:hover, .primary-button:hover, .accent-button:hover { transform: translateY(-1px); }

.version-engrave {
  position: absolute;
  right: 26px;
  bottom: 12px;
  color: var(--muted);
  font-size: 0.78rem;
  opacity: 0.58;
  letter-spacing: 0.06em;
}

.drawer {
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.drawer h2 { margin-bottom: 10px; font-size: 1.05rem; }
.drawer p, .drawer li { color: var(--muted); line-height: 1.6; }

.shortcut-grid {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 18px;
  color: var(--muted);
}

.shortcut-grid span:nth-child(odd) {
  color: var(--ink);
  font-weight: 800;
}

.workspace {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 220px 460px minmax(420px, 680px);
  gap: 14px;
  justify-content: center;
}

.panel {
  min-height: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-heading h2 {
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.drop-zone {
  position: relative;
  display: grid;
  place-items: center;
  gap: 9px;
  min-height: 260px;
  padding: 24px 18px;
  text-align: center;
  border: 2px dashed rgba(58, 120, 216, 0.38);
  border-radius: 20px;
  background:
    radial-gradient(circle at 50% 36%, rgba(58, 120, 216, 0.14), transparent 46%),
    rgba(58, 120, 216, 0.055);
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.drop-zone.is-dragover {
  background:
    radial-gradient(circle at 50% 36%, rgba(58, 120, 216, 0.22), transparent 48%),
    rgba(58, 120, 216, 0.12);
  border-color: var(--blue);
  box-shadow: inset 0 0 0 999px rgba(58, 120, 216, 0.035), 0 0 0 4px rgba(58, 120, 216, 0.10);
  transform: scale(1.01);
}

.drop-zone input { display: none; }

.drop-icon {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  color: var(--blue);
  background: transparent;
  border: 2px dashed rgba(58, 120, 216, 0.34);
  border-radius: 18px;
  font-size: 2.15rem;
  font-weight: 800;
  line-height: 1;
}

.drop-zone small, .empty-note, .image-info { color: var(--muted); }

.image-info {
  margin-top: 14px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.34);
  line-height: 1.6;
  font-size: 0.9rem;
}

body.is-dark .image-info { background: rgba(255,255,255,0.04); }

.effect-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  max-height: calc(100vh - 250px);
  overflow: auto;
  padding-right: 4px;
}

.effect-card {
  min-height: 126px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--ink);
  background: rgba(255,255,255,0.54);
  cursor: pointer;
  text-align: left;
}

body.is-dark .effect-card { background: rgba(255,255,255,0.05); }

.effect-card.is-active {
  border-color: rgba(58, 120, 216, 0.8);
  box-shadow: 0 0 0 3px rgba(58, 120, 216, 0.14);
}

.effect-card.is-disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.effect-card strong, .effect-card small {
  display: block;
}

.effect-card small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.78rem;
}

.mini-preview {
  position: relative;
  display: block;
  height: 58px;
  margin-bottom: 8px;
  border-radius: 13px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(58,120,216,0.24), rgba(106,214,255,0.16)),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.26) 0 8px, transparent 8px 16px);
}

.mini-preview::before {
  content: "";
  position: absolute;
  inset: 12px 18px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(31,42,58,0.62), rgba(58,120,216,0.58));
}

.quake-y::before { animation: quakeY .62s infinite; }
.quake-x::before { animation: quakeX .62s infinite; }
.shake-all::before { animation: shakeAll .52s infinite; }
.drunk-slow::before { animation: drunkSlow 2.8s infinite ease-in-out; }
.breathe::before { animation: breatheMini 2.6s infinite ease-in-out; }
.pan-x::before { animation: panMini 2.4s infinite ease-in-out; }
.wave::before { animation: waveMini 2.0s infinite ease-in-out; }
.spin-fall::before { animation: spinFallMini 1.6s infinite ease-in; }
.suck-in::before { animation: suckInMini 1.6s infinite ease-in; }
.rise::before { animation: riseMini 2.4s infinite ease-in-out; }
.descend::before { animation: descendMini 2.4s infinite ease-in-out; }
.zoom-in::before { animation: miniZoomIn 1.6s infinite; }
.zoom-out::before { animation: miniZoomOut 1.6s infinite; }
.transition::before { animation: transitionPulse 1.8s infinite; }

.white-fade::after, .black-fade::after {
  content: "";
  position: absolute;
  inset: 0;
  animation: fadeCover 1.6s infinite;
}
.white-fade::after { background: white; }
.black-fade::after { background: black; }

@keyframes quakeY { 0%,100%{ transform: translateY(0); } 25%{ transform: translateY(-5px); } 50%{ transform: translateY(4px); } 75%{ transform: translateY(-2px); } }
@keyframes quakeX { 0%,100%{ transform: translateX(0); } 25%{ transform: translateX(-6px); } 50%{ transform: translateX(5px); } 75%{ transform: translateX(-3px); } }
@keyframes shakeAll { 0%,100%{ transform: translate(0,0) rotate(0deg); } 20%{ transform: translate(-5px,3px) rotate(-0.7deg); } 40%{ transform: translate(4px,-4px) rotate(0.6deg); } 60%{ transform: translate(-4px,-2px) rotate(-0.5deg); } 80%{ transform: translate(3px,4px) rotate(0.7deg); } }
@keyframes drunkSlow { 0%,100%{ transform: translate(0,0) rotate(0deg) scale(1); } 25%{ transform: translate(-3px,2px) rotate(-1.2deg) scale(1.02); } 50%{ transform: translate(4px,-2px) rotate(1.3deg) scale(1.04); } 75%{ transform: translate(-2px,-3px) rotate(-0.9deg) scale(1.02); } }
@keyframes breatheMini { 0%,100%{ transform: scale(1); } 50%{ transform: scale(1.08); } }
@keyframes panMini { 0%{ transform: translateX(-8px) scale(1.06); } 50%{ transform: translateX(8px) scale(1.06); } 100%{ transform: translateX(-8px) scale(1.06); } }
@keyframes waveMini { 0%,100%{ transform: skewX(0deg) translateX(0); } 25%{ transform: skewX(6deg) translateX(-4px); } 50%{ transform: skewX(-5deg) translateX(5px); } 75%{ transform: skewX(4deg) translateX(-3px); } }
@keyframes spinFallMini { 0%{ transform: rotate(0deg) scale(1.02); opacity: 1; } 100%{ transform: rotate(18deg) scale(.66) translateY(10px); opacity: .6; } }
@keyframes suckInMini { 0%{ transform: scale(1) rotate(0deg); } 100%{ transform: scale(1.32) rotate(10deg); } }
@keyframes riseMini { 0%{ transform: translateY(8px) scale(1.04); } 50%{ transform: translateY(-8px) scale(1.04); } 100%{ transform: translateY(8px) scale(1.04); } }
@keyframes descendMini { 0%{ transform: translateY(-8px) scale(1.04); } 50%{ transform: translateY(8px) scale(1.04); } 100%{ transform: translateY(-8px) scale(1.04); } }
@keyframes miniZoomIn { from{ transform: scale(.88); } to{ transform: scale(1.28); } }
@keyframes miniZoomOut { from{ transform: scale(1.28); } to{ transform: scale(.88); } }
@keyframes fadeCover { 0%,62%{ opacity: 0; } 100%{ opacity: .84; } }
@keyframes transitionPulse { 0%,45%{ opacity: .9; transform: scale(.95); } 55%,100%{ opacity: .35; transform: scale(1.12); } }

.preview-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.preview-panel .panel-heading {
  margin-bottom: 2px;
}

.canvas-wrap {
  position: relative;
  aspect-ratio: 16/9;
  min-height: 240px;
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  background: #111827;
}

#previewCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.canvas-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  color: rgba(255,255,255,0.72);
  text-align: center;
  background: radial-gradient(circle at center, rgba(58,120,216,.24), rgba(4,9,18,.98));
}

.canvas-placeholder.is-hidden { display: none; }

.settings {
  display: grid;
  margin-top: 6px;
  grid-template-columns: minmax(220px, 1.25fr) minmax(90px, .55fr) minmax(140px, .75fr) minmax(150px, .85fr) auto;
  gap: 12px;
  align-items: end;
}

.settings label { display: grid; gap: 6px; }
.settings label span { color: var(--muted); font-size: .86rem; font-weight: 700; }

.settings input[type="text"],
.settings input[type="number"],
.settings select {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--panel-solid);
}

.checkbox-row {
  grid-column: 1 / -1;
  display: flex !important;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 8px !important;
  padding: 8px 2px 0;
}

.checkbox-row input { width: 18px; height: 18px; }

.button-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 8px;
}

.button-row > button {
  width: 100%;
  justify-content: center;
}

.export-note {
  margin: -2px 0 0;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(245, 158, 11, 0.24);
  background: rgba(245, 158, 11, 0.09);
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

body.is-dark .export-note {
  border-color: rgba(251, 191, 36, 0.22);
  background: rgba(251, 191, 36, 0.08);
  color: #d7e6ff;
}


.primary-button, .accent-button {
  min-height: 44px;
  padding: 10px 18px;
  font-weight: 800;
}

.primary-button {
  color: var(--blue-deep);
  background: rgba(58, 120, 216, 0.10);
}

.accent-button {
  color: white;
  border-color: transparent;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
}

.primary-button:disabled, .accent-button:disabled {
  cursor: not-allowed;
  opacity: .55;
  transform: none;
}

.export-status {
  min-height: 28px;
  margin-top: 2px;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.5;
}

.download-actions {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(120px, 3fr);
  gap: 12px;
  align-items: stretch;
  margin-top: auto;
  padding-top: 8px;
}

.download-link,
.clear-button {
  border: 1px solid rgba(220, 38, 38, 0.36);
  color: #ffffff;
  background: linear-gradient(135deg, #f87171, #dc2626);
}

.download-link {
  display: inline-flex;
  width: 100%;
  justify-content: center;
  align-items: center;
  padding: 10px 18px;
  color: white;
  text-decoration: none;
  background: linear-gradient(135deg, #10b981, #2dd4bf);
}

.clear-button {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255,255,255,0.52);
}

body.is-dark .clear-button {
  border-color: rgba(248, 113, 113, 0.52);
  background: linear-gradient(135deg, #ef4444, #7f1d1d);
}


.app-footer {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 14px 2px;
  color: var(--muted);
  font-size: .82rem;
}

.effect-grid::-webkit-scrollbar { width: 9px; }
.effect-grid::-webkit-scrollbar-thumb {
  background: rgba(58, 120, 216, .42);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
.effect-grid::-webkit-scrollbar-track { background: transparent; }

@media (max-width: 1180px) {
  .workspace { grid-template-columns: 1fr 1fr; }
  .preview-panel { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .app-shell { padding: 10px; }
  .app-header { grid-template-columns: 1fr; gap: 12px; }
  .header-actions { flex-wrap: wrap; }
  .workspace { grid-template-columns: 1fr; }
  .effect-grid { grid-template-columns: 1fr; max-height: none; }
  .settings { grid-template-columns: 1fr; }
  .button-row { grid-template-columns: 1fr; }
  .download-actions { grid-template-columns: 1fr; }
  .app-footer { flex-direction: column; }
}

.x-share-link {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  color: #f8fbff;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 999px;
  background: linear-gradient(135deg, #8a96a8, #4f5b6d);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.28), 0 8px 18px rgba(31,42,58,.14);
  transition: transform .18s ease, filter .18s ease, box-shadow .18s ease;
}

.x-share-link span {
  display: block;
  transform: translateY(-.5px);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
}

.x-share-link:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.34), 0 10px 22px rgba(31,42,58,.20);
}

.legal-footer {
  width: 100%;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  line-height: 1.7;
}

.legal-footer h2 {
  margin: 0 0 10px;
  font-size: 1.02rem;
}

.legal-footer p {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
}

.legal-footer p + p { margin-top: 10px; }

.legal-footer a {
  color: var(--blue);
  font-weight: 800;
  text-decoration: none;
}

.legal-footer a:hover { text-decoration: underline; }

@media (min-width: 761px) {
  .workspace {
    min-height: calc(100vh - 186px);
  }
}

/* v0.12 refinements */
.x-share-link {
  width: auto;
  height: 38px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  color: #6f7a8c;
  text-decoration: none;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  padding: 0 2px;
  transition: transform .18s ease, color .18s ease, opacity .18s ease;
}

body.is-dark .x-share-link { color: #dfe7f2; }

.x-share-link span {
  display: block;
  transform: none;
  font-size: 1.34rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.06em;
}

.x-share-link:hover {
  transform: translateY(-1px);
  color: var(--blue);
  filter: none;
  box-shadow: none;
}

.secondary-accent {
  background: linear-gradient(135deg, #475569, var(--blue));
}

.legal-footer {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  line-height: 1.45;
}

.legal-footer h2 {
  margin: 0 0 6px;
  font-size: .82rem;
  line-height: 1.2;
}

.legal-footer p {
  margin: 0;
  color: var(--muted);
  font-size: .72rem;
  white-space: nowrap;
  overflow-x: auto;
  scrollbar-width: thin;
}

.legal-footer p + p { margin-top: 4px; }

.legal-footer a {
  color: var(--blue);
  font-weight: 800;
  text-decoration: none;
}

.legal-footer a:hover { text-decoration: underline; }

@media (max-width: 760px) {
  .legal-footer p { white-space: normal; }
}

/* v0.13 refinements: align X share with header buttons */
.x-share-link {
  min-width: 38px;
  height: auto;
  min-height: 36px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  padding: 8px 12px;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.48);
  box-shadow: none;
  transition: transform .18s ease, border-color .18s ease, background .18s ease, color .18s ease;
}

body.is-dark .x-share-link {
  color: var(--ink);
  background: rgba(255,255,255,0.06);
}

.x-share-link span {
  display: block;
  transform: translateY(-.5px);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.06em;
}

.x-share-link:hover {
  transform: translateY(-1px);
  color: var(--ink);
  border-color: rgba(87, 124, 167, .42);
  background: rgba(255,255,255,0.68);
  filter: none;
  box-shadow: none;
}

body.is-dark .x-share-link:hover {
  background: rgba(255,255,255,0.1);
}

/* v0.14 refinements: align X button to the same shape and baseline as header buttons */
.header-actions {
  align-items: center;
}

.x-share-link {
  width: auto;
  min-width: 64px;
  height: auto;
  min-height: 36px;
  padding: 8px 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transform: none;
  vertical-align: middle;
}

.x-share-link span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transform: none;
}

.x-share-link:hover {
  transform: translateY(-1px);
}


/* v0.15 refinements: compact default-view layout */
@media (min-width: 1181px) {
  .app-shell {
    min-height: 100vh;
    padding: 14px 18px 18px;
    gap: 12px;
  }

  .app-header {
    min-height: 112px;
    padding: 18px 24px;
  }

  h1 {
    margin-bottom: 5px;
  }

  .lead {
    line-height: 1.45;
  }

  .workspace {
    flex: 0 0 auto;
    height: calc(100vh - 162px);
    min-height: 0;
    grid-template-columns: 220px 460px minmax(420px, 680px);
    gap: 12px;
    justify-content: center;
  }

  .panel {
    padding: 14px;
    overflow: hidden;
  }

  .panel-heading h2 {
    margin-bottom: 8px;
    font-size: 1rem;
  }

  .panel-kicker {
    margin-bottom: 2px;
    font-size: .72rem;
  }

  .upload-panel {
    display: flex;
    flex-direction: column;
  }

  .drop-zone {
    flex: 1 1 auto;
    min-height: 0;
    padding: 16px 12px;
    gap: 7px;
  }

  .drop-icon {
    width: 46px;
    height: 46px;
    border-radius: 15px;
    font-size: 1.7rem;
  }

  .drop-zone strong {
    font-size: .92rem;
    line-height: 1.35;
  }

  .drop-zone small {
    font-size: .76rem;
    line-height: 1.45;
  }

  .image-info {
    margin-top: 10px;
    padding: 10px;
    font-size: .78rem;
    line-height: 1.45;
  }

  .effects-panel {
    display: flex;
    flex-direction: column;
  }

  .effect-grid {
    flex: 1 1 auto;
    min-height: 0;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    max-height: none;
    overflow: hidden;
    padding-right: 0;
  }

  .effect-card {
    min-height: 0;
    padding: 8px;
    border-radius: 15px;
  }

  .mini-preview {
    height: 40px;
    margin-bottom: 6px;
    border-radius: 10px;
  }

  .mini-preview::before {
    inset: 8px 13px;
    border-radius: 7px;
  }

  .effect-card strong {
    font-size: .88rem;
    line-height: 1.2;
  }

  .effect-card small {
    margin-top: 1px;
    font-size: .68rem;
    line-height: 1.2;
  }

  .preview-panel {
    gap: 12px;
  }

  .canvas-wrap {
    flex: 1 1 auto;
    min-height: 0;
    max-height: none;
  }

  .settings {
    grid-template-columns: minmax(190px, 1.15fr) minmax(78px, .52fr) minmax(120px, .72fr) minmax(132px, .82fr) auto;
    gap: 10px;
    align-items: end;
  }

  .settings label span {
    font-size: .78rem;
  }

  .settings input[type="text"],
  .settings input[type="number"],
  .settings select {
    min-height: 38px;
    padding: 8px 10px;
    border-radius: 12px;
  }

  .checkbox-row {
    grid-column: auto;
    align-self: end;
    min-height: 38px;
    padding: 0 2px;
    white-space: nowrap;
  }

  .button-row {
    gap: 8px;
  }

  .download-actions {
    gap: 8px;
  }

  .primary-button, .accent-button {
    min-height: 40px;
    padding: 8px 15px;
  }

  .export-status {
    min-height: 20px;
    font-size: .82rem;
    line-height: 1.35;
  }

  .legal-footer {
    margin-top: 0;
  }
}


.clear-button {
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.clear-button:hover {
  transform: translateY(-1px);
  border-color: rgba(248, 113, 113, 0.78);
  filter: brightness(1.05);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.28), 0 12px 24px rgba(220, 38, 38, .18);
}

body.is-dark .clear-button:hover {
  filter: brightness(1.08);
}

.drop-zone:hover {
  border-color: rgba(58, 120, 216, 0.62);
  background:
    radial-gradient(circle at 50% 36%, rgba(58, 120, 216, 0.18), transparent 48%),
    rgba(58, 120, 216, 0.08);
}

.drop-zone:hover .drop-icon {
  color: var(--blue-deep);
  border-color: rgba(58, 120, 216, 0.52);
}

.download-link:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.28), 0 12px 24px rgba(16, 185, 129, .18);
}


/* v0.28 header alignment based on shared header reference */
:root {
  --header-h: 108px;
}

.app-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto auto;
  column-gap: 1rem;
  row-gap: 0.32rem;
  align-items: start;
  min-height: 0;
  height: var(--header-h);
  padding: 1rem 1.25rem 0.92rem;
  border-radius: 24px;
  overflow: hidden;
}

.title-block {
  grid-column: 1;
  grid-row: 1 / span 2;
  min-width: 0;
  padding-right: 0.5rem;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  align-content: start;
}

.eyebrow {
  margin: 0 0 0.18rem;
  font-size: 0.72rem;
  line-height: 1.1;
  letter-spacing: 0.12em;
}

.app-header h1 {
  margin: 0;
  font-size: clamp(1.35rem, 2.05vw, 2.05rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.app-header .lead {
  max-width: 780px;
  margin: 0.38rem 0 0;
  font-size: 0.88rem;
  line-height: 1.55;
  font-weight: 650;
}

.header-actions {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 0.42rem;
  min-width: 500px;
  max-width: 660px;
  margin-top: -0.02rem;
}

.header-actions .ghost-button,
.x-share-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.12rem;
  padding: 0.38rem 0.68rem;
  border: 1.5px solid rgba(76, 100, 132, 0.18);
  border-radius: 999px;
  background: rgba(255,255,255,0.48);
  color: var(--ink);
  font-size: 0.78rem;
  line-height: 1;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 5px 12px rgba(25, 43, 76, 0.08);
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease, background 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

body.is-dark .header-actions .ghost-button,
body.is-dark .x-share-link {
  border-color: rgba(168, 204, 255, 0.16);
  background: rgba(255,255,255,0.06);
  color: var(--ink);
}

.x-share-link {
  width: 2.12rem;
  min-width: 2.12rem;
  padding-left: 0;
  padding-right: 0;
}

.x-share-link span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transform: none;
  font-size: 1.05rem;
  line-height: 1;
  font-weight: 500;
  letter-spacing: -0.04em;
}

.header-actions .ghost-button:hover,
.x-share-link:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
  border-color: rgba(58,120,216,0.58);
  color: var(--blue-deep);
  background: rgba(58,120,216,0.12);
  box-shadow: 0 8px 18px rgba(58,120,216,0.10);
}

body.is-dark .header-actions .ghost-button:hover,
body.is-dark .x-share-link:hover {
  border-color: rgba(105,168,255,0.58);
  color: #dfeeff;
  background: rgba(105,168,255,0.12);
}

.version-engrave {
  grid-column: 2;
  grid-row: 2;
  position: static;
  align-self: baseline;
  justify-self: end;
  margin: 0;
  padding-top: 0.05rem;
  transform: translateY(4px);
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.55;
  font-weight: 850;
  letter-spacing: 0.02em;
  opacity: 0.62;
  text-align: right;
  white-space: nowrap;
  pointer-events: none;
}

/* v0.28 outlined action buttons */
.download-link,
.clear-button {
  min-height: 50px;
  border-radius: 999px;
  font-weight: 900;
  letter-spacing: .02em;
  background: rgba(255,255,255,0.42);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.32), 0 10px 20px rgba(25, 43, 76, .08);
  transition: transform .18s ease, filter .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
}

.download-link {
  display: inline-flex;
  width: 100%;
  justify-content: center;
  align-items: center;
  padding: 10px 18px;
  color: #059669;
  text-decoration: none;
  border: 2px solid rgba(16, 185, 129, 0.72);
  background:
    linear-gradient(135deg, rgba(16,185,129,0.13), rgba(45,212,191,0.10)),
    rgba(255,255,255,0.50);
}

.clear-button {
  border: 2px solid rgba(220, 38, 38, 0.72);
  color: #dc2626;
  background:
    linear-gradient(135deg, rgba(248,113,113,0.14), rgba(220,38,38,0.10)),
    rgba(255,255,255,0.50);
}

body.is-dark .download-link {
  color: #86efac;
  border-color: rgba(134, 239, 172, 0.74);
  background:
    linear-gradient(135deg, rgba(16,185,129,0.16), rgba(45,212,191,0.10)),
    rgba(255,255,255,0.045);
}

body.is-dark .clear-button {
  color: #fca5a5;
  border-color: rgba(248, 113, 113, 0.76);
  background:
    linear-gradient(135deg, rgba(248,113,113,0.15), rgba(220,38,38,0.10)),
    rgba(255,255,255,0.045);
}

.download-link:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.36), 0 12px 24px rgba(16, 185, 129, .18);
  border-color: rgba(16, 185, 129, 0.98);
}

.clear-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.36), 0 12px 24px rgba(220, 38, 38, .18);
  border-color: rgba(220, 38, 38, 0.98);
}

@media (max-width: 920px) {
  .app-header {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    height: auto;
    min-height: auto;
    row-gap: 0.45rem;
    padding: 0.95rem 1rem 1.05rem;
  }

  .title-block,
  .header-actions,
  .version-engrave {
    grid-column: 1;
  }

  .title-block {
    grid-row: 1;
    display: block;
    padding-right: 0;
  }

  .header-actions {
    grid-row: 2;
    justify-content: flex-start;
    min-width: 0;
    max-width: 100%;
  }

  .version-engrave {
    grid-row: 3;
    justify-self: start;
    text-align: left;
    transform: none;
  }

  .header-actions .ghost-button {
    font-size: 0.72rem;
    min-height: 2.05rem;
    padding: 0.36rem 0.62rem;
  }

  .x-share-link {
    width: 2.05rem;
    min-width: 2.05rem;
    min-height: 2.05rem;
  }
}


/* v0.29 preview controls and drawer refinements */
.drawer {
  width: 100%;
  max-width: 1388px;
  margin-left: auto;
  margin-right: auto;
}

.settings {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 8px;
  align-items: stretch;
}

.settings label:first-child {
  grid-column: 1 / -1;
}

.settings label:first-child input {
  min-height: 44px;
}

.settings label:not(:first-child) {
  min-width: 0;
}

.settings {
  grid-template-areas:
    "filename filename filename filename"
    "seconds quality size loop";
  grid-template-columns: minmax(80px, .58fr) minmax(120px, .85fr) minmax(150px, 1fr) auto;
}

.settings label:nth-child(1) { grid-area: filename; }
.settings label:nth-child(2) { grid-area: seconds; }
.settings label:nth-child(3) { grid-area: quality; }
.settings label:nth-child(4) { grid-area: size; }
.settings .loop-pill { grid-area: loop; }

.loop-pill {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: 8px !important;
  min-height: 44px;
  margin-top: auto;
  padding: 8px 14px !important;
  border: 1.5px solid rgba(58, 120, 216, 0.34);
  border-radius: 999px;
  color: var(--blue-deep);
  background: rgba(58, 120, 216, 0.08);
  font-weight: 850;
  white-space: nowrap;
  cursor: pointer;
  transition: transform .16s ease, border-color .16s ease, background .16s ease;
}

.loop-pill:hover {
  transform: translateY(-1px);
  border-color: rgba(58, 120, 216, 0.58);
  background: rgba(58, 120, 216, 0.12);
}

body.is-dark .loop-pill {
  color: #dfeeff;
  border-color: rgba(105, 168, 255, 0.34);
  background: rgba(105, 168, 255, 0.10);
}

.loop-pill input {
  width: 18px;
  height: 18px;
  accent-color: var(--blue);
}

.loop-pill span {
  color: inherit !important;
  font-size: .86rem !important;
  font-weight: 900 !important;
}

@media (min-width: 1181px) {
  .settings {
    grid-template-areas:
      "filename filename filename filename"
      "seconds quality size loop";
    grid-template-columns: minmax(80px, .58fr) minmax(120px, .85fr) minmax(150px, 1fr) auto;
    gap: 10px 12px;
  }

  .loop-pill {
    min-height: 38px;
    padding: 7px 13px !important;
  }
}

@media (max-width: 760px) {
  .settings {
    grid-template-areas:
      "filename"
      "seconds"
      "quality"
      "size"
      "loop";
    grid-template-columns: 1fr;
  }

  .loop-pill {
    width: fit-content;
  }
}


/* v0.33 drawer cards, header nav, and night export tone */
.drawer {
  position: relative;
  padding: 22px;
  border-radius: 22px;
}

.drawer h2 {
  margin: 0 0 18px;
  font-size: 1.06rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.drawer-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: 999px;
  color: var(--blue);
  background: rgba(106, 214, 255, 0.16);
  font-size: 1.42rem;
  font-weight: 900;
  line-height: 1;
}

.drawer-close:hover {
  transform: translateY(-1px);
  background: rgba(106, 214, 255, 0.24);
}

.guide-list {
  display: grid;
  gap: 10px;
}

.guide-list p {
  margin: 0;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.56);
  color: var(--ink);
  font-size: 0.88rem;
  line-height: 1.55;
  font-weight: 700;
}

body.is-dark .guide-list p {
  background: rgba(255,255,255,0.055);
  color: var(--ink);
}

.shortcut-grid {
  display: grid;
  grid-template-columns: minmax(360px, 1fr) minmax(280px, 1fr);
  gap: 10px 12px;
}

.shortcut-grid > div,
.shortcut-grid > span {
  min-height: 46px;
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.56);
  color: var(--ink);
  font-size: 0.86rem;
  line-height: 1.35;
  font-weight: 750;
}

.shortcut-grid > div {
  gap: 7px;
  padding: 10px 14px;
  flex-wrap: wrap;
}

.shortcut-grid > span {
  padding: 10px 14px;
}

body.is-dark .shortcut-grid > div,
body.is-dark .shortcut-grid > span {
  background: rgba(255,255,255,0.055);
  color: var(--ink);
}

.shortcut-grid kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 25px;
  padding: 3px 9px;
  border: 1px solid rgba(106,214,255,0.42);
  border-radius: 999px;
  background: rgba(106,214,255,0.14);
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  font-weight: 900;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.28);
}

.shortcut-grid b {
  color: var(--muted);
  font-weight: 900;
}

.header-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.12rem;
  padding: 0.38rem 0.72rem;
  border: 1.5px solid rgba(76, 100, 132, 0.18);
  border-radius: 999px;
  background: rgba(255,255,255,0.48);
  color: var(--ink);
  font-size: 0.78rem;
  line-height: 1;
  font-weight: 850;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 5px 12px rgba(25, 43, 76, 0.08);
  transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
}

.header-nav-link:hover {
  transform: translateY(-1px);
  border-color: rgba(58,120,216,0.58);
  color: var(--blue-deep);
  background: rgba(58,120,216,0.12);
}

body.is-dark .header-nav-link {
  border-color: rgba(168, 204, 255, 0.16);
  background: rgba(255,255,255,0.06);
  color: var(--ink);
}

body.is-dark .header-nav-link:hover {
  border-color: rgba(105,168,255,0.58);
  color: #dfeeff;
  background: rgba(105,168,255,0.12);
}

body.is-dark .accent-button {
  color: #dbeafe;
  border: 1px solid rgba(147, 197, 253, 0.22);
  background: linear-gradient(135deg, rgba(30,64,175,0.82), rgba(14,116,144,0.72));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.10), 0 10px 22px rgba(0,0,0,.22);
}

body.is-dark .secondary-accent {
  color: #dbeafe;
  border-color: rgba(148, 163, 184, 0.26);
  background: linear-gradient(135deg, rgba(51,65,85,0.86), rgba(30,64,175,0.72));
}

@media (max-width: 920px) {
  .shortcut-grid {
    grid-template-columns: 1fr;
  }

  .shortcut-grid > span {
    margin-bottom: 4px;
  }

  .header-nav-link {
    font-size: 0.72rem;
    min-height: 2.05rem;
    padding: 0.36rem 0.62rem;
  }
}


/* v0.38 size limit notice */
.export-note {
  border-color: rgba(245, 158, 11, 0.34);
  background: rgba(245, 158, 11, 0.12);
  font-weight: 700;
}


/* v0.40 compact help / shortcut drawer cards */
.drawer {
  padding: 18px 20px;
}

.drawer h2 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.drawer-close {
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  font-size: 1.16rem;
}

.guide-list {
  gap: 7px;
}

.guide-list p {
  padding: 9px 12px;
  border-radius: 13px;
  font-size: 0.82rem;
  line-height: 1.42;
}

.shortcut-grid {
  gap: 7px 9px;
}

.shortcut-grid > div,
.shortcut-grid > span {
  min-height: 34px;
  border-radius: 13px;
  font-size: 0.8rem;
  line-height: 1.28;
}

.shortcut-grid > div {
  gap: 5px;
  padding: 6px 10px;
}

.shortcut-grid > span {
  padding: 6px 10px;
}

.shortcut-grid kbd {
  min-height: 21px;
  padding: 2px 7px;
  font-size: 0.72rem;
}


/* v0.41 symbol theme toggle */
#themeBtn {
  min-width: 2.12rem;
  width: 2.12rem;
  padding-left: 0;
  padding-right: 0;
  display: inline-grid;
  place-items: center;
  font-size: 0.98rem;
  line-height: 1;
}

body.is-dark #themeBtn {
  color: #f8fafc;
  background: rgba(255, 255, 255, 0.07);
}


/* v0.42 version stamp and theme toggle switch */
.version-engrave,
.header-version {
  transform: translateY(8px);
}

#themeBtn {
  min-width: 56px;
  width: 56px;
  height: 30px;
  min-height: 30px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  overflow: visible;
}

.theme-toggle-track {
  position: relative;
  width: 50px;
  height: 26px;
  display: block;
  border-radius: 999px;
  border: 1px solid rgba(66, 100, 150, 0.22);
  background: linear-gradient(135deg, rgba(255, 209, 102, 0.72), rgba(106, 214, 255, 0.44));
  box-shadow: inset 0 1px 3px rgba(36, 54, 90, 0.14), 0 4px 10px rgba(25, 43, 76, 0.08);
}

.theme-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  color: #f59e0b;
  font-size: 0.78rem;
  line-height: 1;
  box-shadow: 0 2px 7px rgba(25, 43, 76, 0.20);
  transition: transform .18s ease, color .18s ease, background .18s ease;
}

body.is-dark #themeBtn {
  color: inherit;
  background: transparent;
}

body.is-dark .theme-toggle-track {
  border-color: rgba(168, 204, 255, 0.22);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.95), rgba(30, 64, 175, 0.72));
  box-shadow: inset 0 1px 4px rgba(0,0,0,0.34), 0 4px 12px rgba(0,0,0,0.20);
}

body.is-dark .theme-toggle-thumb {
  transform: translateX(24px);
  background: rgba(226, 232, 240, 0.96);
  color: #334155;
}


/* v0.43 simple light-mode theme switch */
.theme-toggle-track {
  border-color: rgba(76, 100, 132, 0.20);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: inset 0 1px 3px rgba(36, 54, 90, 0.10), 0 4px 10px rgba(25, 43, 76, 0.08);
}

.theme-toggle-thumb {
  background: #ffffff;
  color: #f59e0b;
  border: 1px solid rgba(76, 100, 132, 0.14);
  box-shadow: 0 2px 7px rgba(25, 43, 76, 0.16);
}


/* v0.44 effect panel tabs and image edit cards */
.effect-tabs { display: flex; gap: 8px; margin: 0 0 10px; }
.effect-tab {
  min-height: 34px; padding: 0.38rem 0.78rem; border: 1px solid var(--line); border-radius: 999px;
  background: rgba(255,255,255,0.48); color: var(--muted); font-size: 0.82rem; line-height: 1;
  font-weight: 850; cursor: pointer; transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
}
.effect-tab:hover { transform: translateY(-1px); border-color: rgba(58,120,216,0.48); color: var(--blue-deep); }
.effect-tab.is-active { color: var(--blue-deep); border-color: rgba(58,120,216,0.52); background: rgba(58,120,216,0.12); }
body.is-dark .effect-tab { background: rgba(255,255,255,0.055); color: var(--muted); }
body.is-dark .effect-tab.is-active { color: #dbeafe; border-color: rgba(105,168,255,0.48); background: rgba(105,168,255,0.12); }
.tab-panel[hidden] { display: none !important; }
.image-edit-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; max-height: 460px; overflow: auto; padding: 6px 4px 2px 2px; margin-top: 6px; align-content: start; }
.image-edit-section-title { grid-column: 1 / -1; margin: 4px 0 2px; color: var(--brand-strong); font-size: 0.78rem; font-weight: 900; letter-spacing: 0.08em; }
.image-edit-card {
  display: grid; gap: 6px; text-align: left; padding: 10px 12px; border-radius: 18px; border: 1px solid var(--line); background: rgba(255,255,255,0.62); color: var(--ink); min-height: 106px;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}
.image-edit-card span { font-size: 0.9rem; line-height: 1.15; font-weight: 900; }
.image-edit-card small { color: var(--muted); font-size: 0.72rem; line-height: 1.35; font-weight: 700; }
.image-edit-card:hover { transform: translateY(-1px); border-color: rgba(58,120,216,0.45); box-shadow: 0 8px 18px rgba(25,43,76,0.08); }
.image-edit-card.is-active { border-color: rgba(58,120,216,0.58); background: rgba(58,120,216,0.12); box-shadow: 0 0 0 1px rgba(58,120,216,0.10); }
body.is-dark .image-edit-card { background: rgba(255,255,255,0.055); }
body.is-dark .image-edit-card.is-active { border-color: rgba(105,168,255,0.50); background: rgba(105,168,255,0.12); }
.image-edit-note { margin: 10px 0 0; color: var(--muted); font-size: 0.72rem; line-height: 1.45; font-weight: 700; }
@media (max-width: 920px) { .image-edit-grid { grid-template-columns: 1fr; max-height: none; } }


/* v0.45 transition upload note */
.image-info strong {
  display: inline-block;
  margin-bottom: 2px;
}


/* v0.46 effect heading / motion list organization */
.panel-heading-inline .panel-kicker {
  margin-bottom: 0.18rem;
}

.effects-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-heading-inline h2 {
  margin-bottom: 0;
}

.effect-tabs {
  flex: 0 0 auto;
  margin: 0;
  align-items: center;
}

.effects-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

#motionPanel {
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.effect-grid {
  flex: 1 1 auto;
  min-height: 0;
  max-height: min(560px, calc(100vh - 310px));
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 6px;
  scrollbar-width: thin;
}

@media (max-width: 920px) {
  .effects-heading-row {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .effect-tabs {
    width: 100%;
    justify-content: flex-start;
  }

  .effect-grid {
    max-height: 420px;
    overflow-y: auto;
  }
}


/* v0.47 motion card spacing, blue scrollbar, and crossfade thumbnail strip */
.effects-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

#motionPanel.tab-panel.is-active {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.effect-grid {
  flex: 1 1 auto;
  height: 100%;
  max-height: none !important;
  min-height: 0;
  overflow-y: auto !important;
  overflow-x: hidden !important;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: minmax(116px, auto);
  align-content: start;
  gap: 12px;
  padding: 2px 7px 10px 2px;
  scrollbar-width: thin;
  scrollbar-color: rgba(58, 120, 216, 0.72) transparent;
}

.effect-grid::-webkit-scrollbar {
  width: 7px;
}

.effect-grid::-webkit-scrollbar-track {
  background: transparent;
}

.effect-grid::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(106,214,255,0.95), rgba(58,120,216,0.78));
}

.effect-grid::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(106,214,255,1), rgba(58,120,216,0.95));
}

.effect-card {
  min-height: 116px;
  height: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: hidden;
}

.effect-card .mini-preview {
  flex: 0 0 auto;
}

.transition-thumbs {
  margin-top: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.46);
}

body.is-dark .transition-thumbs {
  background: rgba(255,255,255,0.045);
}

.transition-thumbs[hidden] {
  display: none !important;
}

.transition-thumbs-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.transition-thumbs-head strong {
  font-size: 0.82rem;
  line-height: 1;
  font-weight: 900;
}

.transition-thumbs-head span {
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1;
  font-weight: 750;
}

.transition-thumb-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(58, 120, 216, 0.72) transparent;
}

.transition-thumb-list::-webkit-scrollbar {
  height: 7px;
}

.transition-thumb-list::-webkit-scrollbar-track {
  background: transparent;
}

.transition-thumb-list::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(106,214,255,0.95), rgba(58,120,216,0.78));
}

.transition-thumb {
  position: relative;
  flex: 0 0 104px;
  width: 104px;
  height: 58px;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(58,120,216,0.30);
  border-radius: 12px;
  background: #000;
  cursor: grab;
}

.transition-thumb:active {
  cursor: grabbing;
}

.transition-thumb.is-dragging {
  opacity: .46;
}

.transition-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.transition-thumb span {
  position: absolute;
  top: 4px;
  left: 4px;
  min-width: 20px;
  height: 20px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(9, 25, 54, .78);
  color: #fff;
  font-size: .7rem;
  font-weight: 900;
  line-height: 1;
}

@media (max-width: 920px) {
  .effect-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-rows: minmax(108px, auto);
    max-height: 420px !important;
  }

  .effect-card {
    min-height: 108px;
  }
}


/* v0.48 motion card spacing / 3-column list / transition thumbnails */
#motionPanel {
  flex: 1 1 auto;
  min-height: 0;
}

#motionPanel .effect-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: auto;
  align-content: start;
  gap: 10px;
  max-height: none;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(58, 120, 216, 0.72) transparent;
}

#motionPanel .effect-grid::-webkit-scrollbar {
  width: 8px;
}

#motionPanel .effect-grid::-webkit-scrollbar-track {
  background: transparent;
}

#motionPanel .effect-grid::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(106,214,255,0.88), rgba(58,120,216,0.74));
  border-radius: 999px;
}

#motionPanel .effect-card {
  min-height: 104px;
  height: auto;
  display: grid;
  grid-template-rows: 42px auto auto;
  gap: 4px;
  padding: 8px;
  align-content: start;
}

#motionPanel .mini-preview {
  height: 42px;
  margin-bottom: 0;
}

.transition-thumb-panel {
  margin-top: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.50);
}

body.is-dark .transition-thumb-panel {
  background: rgba(255,255,255,0.045);
}

.transition-thumb-panel[hidden] {
  display: none !important;
}

.transition-thumb-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.transition-thumb-head strong {
  font-size: 0.82rem;
  font-weight: 900;
}

.transition-thumb-head span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.transition-thumb-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(58, 120, 216, 0.72) transparent;
}

.transition-thumb-list::-webkit-scrollbar {
  height: 7px;
}

.transition-thumb-list::-webkit-scrollbar-track {
  background: transparent;
}

.transition-thumb-list::-webkit-scrollbar-thumb {
  background: linear-gradient(90deg, rgba(106,214,255,0.88), rgba(58,120,216,0.74));
  border-radius: 999px;
}

.transition-thumb-card {
  position: relative;
  flex: 0 0 92px;
  width: 92px;
  padding: 5px;
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255,255,255,0.62);
  color: var(--ink);
  cursor: grab;
}

.transition-thumb-card:active {
  cursor: grabbing;
}

.transition-thumb-card.is-dragging {
  opacity: 0.48;
}

.transition-thumb-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  border-radius: 8px;
  background: #000;
}

.thumb-order {
  position: absolute;
  top: 6px;
  left: 6px;
  min-width: 20px;
  height: 20px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(58,120,216,0.92);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 900;
  line-height: 1;
}

.thumb-name {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 750;
}

body.is-dark .transition-thumb-card {
  background: rgba(255,255,255,0.06);
}

@media (max-width: 920px) {
  #motionPanel .effect-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    height: auto;
    max-height: 420px;
  }

  #motionPanel .effect-card {
    min-height: 100px;
  }
}


/* v0.51 image edit full-panel layout */
#imageEditPanel {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
#imageEditPanel:not([hidden]) {
  display: flex;
}
#imageEditPanel .image-edit-grid {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: auto;
  align-content: start;
  gap: 10px;
  max-height: none;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 8px 4px 2px;
  margin-top: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(58, 120, 216, 0.72) transparent;
}
#imageEditPanel .image-edit-grid::-webkit-scrollbar { width: 8px; }
#imageEditPanel .image-edit-grid::-webkit-scrollbar-track { background: transparent; }
#imageEditPanel .image-edit-grid::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(106,214,255,0.88), rgba(58,120,216,0.74));
  border-radius: 999px;
}
#imageEditPanel .image-edit-card {
  min-height: 104px;
  height: auto;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 4px;
  align-content: start;
}
#imageEditPanel .image-edit-section-title {
  margin: 6px 0 0;
}
#imageEditPanel .image-edit-note {
  margin-top: 10px;
}
@media (max-width: 920px) {
  #imageEditPanel .image-edit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    height: auto;
    max-height: 420px;
  }
}
@media (max-width: 640px) {
  #imageEditPanel .image-edit-grid {
    grid-template-columns: 1fr;
  }
}


/* v0.55 unify panel heading vertical spacing */
.effects-panel .panel-heading-inline .panel-kicker {
  margin-bottom: 0.12rem;
}

.effects-panel .effects-heading-row {
  margin-top: 0;
  align-items: center;
}

.effects-panel .panel-heading-inline h2 {
  margin-top: 0;
  margin-bottom: 0;
  line-height: 1.12;
}

.effects-panel .effect-tabs {
  margin-top: -0.04rem;
}


/* v0.56 tighten spacing between kicker and title in panel 02 */
.effects-panel .panel-heading-inline {
  gap: 0.04rem;
}

.effects-panel .panel-heading-inline .panel-kicker {
  margin-bottom: 0.02rem;
  line-height: 1.0;
}

.effects-panel .panel-heading-inline h2 {
  margin-top: 0;
  line-height: 1.04;
}


/* v0.57 transition thumbnail visibility and note handling */
.export-note.is-hidden,
.export-note[hidden] {
  display: none !important;
}

.preview-panel .canvas-wrap {
  flex: 0 0 auto;
}

.transition-thumb-panel {
  flex: 0 0 auto;
  margin-top: 12px;
  padding: 10px 12px 12px;
  min-height: 138px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.58);
  overflow: visible;
}

body.is-dark .transition-thumb-panel {
  background: rgba(255,255,255,0.055);
}

.transition-thumb-panel[hidden] {
  display: none !important;
}

.transition-thumb-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.transition-thumb-head strong {
  font-size: 0.82rem;
  font-weight: 900;
}

.transition-thumb-head span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 750;
}

.transition-thumb-list {
  min-height: 86px;
  display: flex;
  gap: 9px;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0 0 6px;
  scrollbar-width: thin;
  scrollbar-color: rgba(58, 120, 216, 0.72) transparent;
}

.transition-thumb-list::-webkit-scrollbar {
  height: 7px;
}

.transition-thumb-list::-webkit-scrollbar-track {
  background: transparent;
}

.transition-thumb-list::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(106,214,255,0.88), rgba(58,120,216,0.74));
}

.transition-thumb-card {
  position: relative;
  flex: 0 0 132px;
  width: 132px;
  min-height: 82px;
  padding: 5px;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255,255,255,0.72);
  color: var(--ink);
  cursor: grab;
  box-shadow: 0 6px 14px rgba(25,43,76,0.07);
}

.transition-thumb-card:active {
  cursor: grabbing;
}

.transition-thumb-card.is-dragging {
  opacity: 0.48;
}

.transition-thumb-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  border-radius: 9px;
  background: #000;
}

.thumb-order {
  position: absolute;
  top: 7px;
  left: 7px;
  min-width: 22px;
  height: 22px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(58,120,216,0.94);
  color: #fff;
  font-size: 0.70rem;
  font-weight: 900;
  line-height: 1;
}

.thumb-name {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 750;
}

body.is-dark .transition-thumb-card {
  background: rgba(255,255,255,0.075);
}

@media (max-width: 920px) {
  .transition-thumb-card {
    flex-basis: 118px;
    width: 118px;
  }
}


/* v0.58 tighten preview spacing around transition section */
.preview-panel {
  gap: 14px;
}

.transition-thumb-panel {
  margin-top: 4px;
  padding: 8px 12px 8px;
  min-height: 124px;
}

.transition-thumb-head {
  margin-bottom: 5px;
}

.transition-thumb-list {
  min-height: 80px;
  padding: 0 0 2px;
}

.settings {
  margin-top: 0;
}

.download-actions {
  padding-top: 4px;
}

@media (max-width: 920px) {
  .preview-panel {
    gap: 10px;
  }

  .transition-thumb-panel {
    margin-top: 2px;
    padding: 8px 10px 6px;
    min-height: 118px;
  }

  .transition-thumb-head {
    margin-bottom: 4px;
  }
}


/* v0.59 default preview spacing refinement */
.preview-panel .canvas-wrap {
  min-height: 300px;
}

.export-status {
  min-height: 34px;
  margin-top: 0;
}

.download-actions {
  margin-top: 0;
  padding-top: 2px;
}

@media (max-width: 920px) {
  .preview-panel .canvas-wrap {
    min-height: 280px;
  }

  .export-status {
    min-height: 32px;
  }
}


/* v0.60 transition variants and slight preview spacing tweak */
.hardcut::before { animation: transitionHardcutMini 1.8s infinite steps(1, end); }
.wipe::before { animation: transitionWipeMini 1.8s infinite ease-in-out; transform-origin: left center; }

@keyframes transitionHardcutMini {
  0%, 49% { opacity: .95; transform: scale(.96); }
  50%, 100% { opacity: .45; transform: scale(1.10); }
}

@keyframes transitionWipeMini {
  0% { opacity: .9; clip-path: inset(0 100% 0 0); }
  50% { opacity: .85; clip-path: inset(0 38% 0 0); }
  100% { opacity: .8; clip-path: inset(0 0 0 0); }
}

@media (min-width: 1181px) {
  .preview-panel .canvas-wrap {
    min-height: 0;
  }
}


/* v0.61 stable preview control layout */
.preview-panel {
  --preview-controls-height: auto;
}

.preview-controls {
  display: flex;
  flex-direction: column;
  flex: 0 0 auto;
  gap: 10px;
}

.preview-panel .panel-heading,
.transition-thumb-panel,
.preview-controls {
  flex: 0 0 auto;
}

.preview-panel .canvas-wrap {
  flex: 1 1 auto;
  min-height: 300px;
}

.settings,
.button-row,
.export-note,
.export-status,
.download-actions {
  margin-top: 0;
}

.export-status {
  min-height: 42px;
}

.download-actions {
  padding-top: 0;
}

@media (max-width: 920px) {
  .preview-controls {
    gap: 8px;
  }

  .preview-panel .canvas-wrap {
    min-height: 260px;
  }

  .export-status {
    min-height: 38px;
  }
}


/* v0.63 compact image-edit cards */
#imageEditPanel .image-edit-grid {
  gap: 8px;
}

#imageEditPanel .image-edit-card {
  min-height: 78px;
  padding: 8px 10px;
  gap: 3px;
  border-radius: 15px;
}

#imageEditPanel .image-edit-card span {
  font-size: 0.82rem;
  line-height: 1.12;
}

#imageEditPanel .image-edit-card small {
  font-size: 0.66rem;
  line-height: 1.25;
}

#imageEditPanel .image-edit-section-title {
  margin: 4px 0 0;
  font-size: 0.72rem;
}

@media (max-width: 920px) {
  #imageEditPanel .image-edit-card {
    min-height: 74px;
  }
}


/* v0.64 selected-card visibility and laptop-friendly scroll handling */
.effect-card,
.image-edit-card {
  position: relative;
}

#motionPanel .effect-card:not(.is-active),
#imageEditPanel .image-edit-card:not(.is-active) {
  opacity: 0.74;
  filter: saturate(0.76);
}

#motionPanel .effect-card:not(.is-active):hover,
#imageEditPanel .image-edit-card:not(.is-active):hover,
#motionPanel .effect-card:not(.is-active):focus-visible,
#imageEditPanel .image-edit-card:not(.is-active):focus-visible {
  opacity: 0.92;
  filter: saturate(0.95);
}

#motionPanel .effect-card.is-active,
#imageEditPanel .image-edit-card.is-active {
  opacity: 1;
  filter: none;
  border-color: rgba(58, 120, 216, 0.86);
  background: rgba(58, 120, 216, 0.13);
  box-shadow:
    0 0 0 3px rgba(58, 120, 216, 0.15),
    0 12px 26px rgba(58, 120, 216, 0.14);
}

body.is-dark #motionPanel .effect-card.is-active,
body.is-dark #imageEditPanel .image-edit-card.is-active {
  border-color: rgba(105, 168, 255, 0.78);
  background: rgba(105, 168, 255, 0.14);
  box-shadow:
    0 0 0 3px rgba(105, 168, 255, 0.16),
    0 12px 26px rgba(0, 0, 0, 0.24);
}

#motionPanel .effect-card.is-active::after,
#imageEditPanel .image-edit-card.is-active::after {
  content: "✓";
  position: absolute;
  top: 7px;
  right: 8px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  color: #fff;
  background: var(--blue);
  font-size: 0.74rem;
  font-weight: 950;
  line-height: 1;
  box-shadow: 0 4px 10px rgba(58, 120, 216, 0.28);
  pointer-events: none;
}

#imageEditPanel .image-edit-card.is-active::after {
  top: 6px;
  right: 7px;
  width: 20px;
  height: 20px;
  font-size: 0.68rem;
}

.preview-panel {
  min-height: 0;
}

.preview-panel .panel-heading,
.preview-panel .canvas-wrap,
.transition-thumb-panel {
  flex: 0 0 auto;
}

.preview-controls {
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(58, 120, 216, 0.72) transparent;
}

.preview-controls::-webkit-scrollbar {
  width: 7px;
}

.preview-controls::-webkit-scrollbar-track {
  background: transparent;
}

.preview-controls::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(106,214,255,0.88), rgba(58,120,216,0.74));
}

.preview-controls::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(106,214,255,1), rgba(58,120,216,0.92));
}

@media (min-width: 1181px) {
  .app-shell {
    min-height: 100vh;
    padding-bottom: 22px;
  }

  .workspace {
    min-height: min(760px, calc(100vh - 160px));
  }

  .preview-panel {
    overflow: hidden;
  }

  .preview-controls {
    max-height: max(248px, calc(100vh - 520px));
  }
}

@media (min-width: 1181px) and (max-height: 820px) {
  .workspace {
    height: calc(100vh - 128px);
    min-height: 640px;
  }

  .legal-footer {
    margin-top: 10px;
  }

  .preview-panel {
    gap: 10px;
  }

  .preview-controls {
    max-height: 236px;
  }

  .preview-panel .canvas-wrap {
    min-height: 260px;
  }
}

@media (min-width: 1181px) and (max-height: 740px) {
  .workspace {
    min-height: 620px;
  }

  .preview-controls {
    max-height: 224px;
  }

  .preview-panel .canvas-wrap {
    min-height: 240px;
  }
}

@media (max-width: 1180px) {
  .preview-panel {
    overflow: hidden;
  }

  .preview-controls {
    max-height: 360px;
  }
}


/* v0.65 toast notifications */
.toast-host {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 9999;
  width: min(520px, calc(100vw - 32px));
  display: grid;
  gap: 10px;
  transform: translateX(-50%);
  pointer-events: none;
}

.toast {
  min-height: 48px;
  padding: 13px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: pre-line;
  text-align: center;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 18px 46px rgba(25, 43, 76, 0.22);
  font-size: 0.9rem;
  line-height: 1.55;
  font-weight: 850;
  opacity: 0;
  transform: translateY(14px) scale(0.98);
  transition: opacity .22s ease, transform .22s ease;
  pointer-events: auto;
  cursor: pointer;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.toast-info {
  border-color: rgba(58, 120, 216, 0.34);
  background:
    linear-gradient(135deg, rgba(58, 120, 216, 0.14), rgba(106, 214, 255, 0.10)),
    rgba(255,255,255,0.95);
}

.toast-success {
  border-color: rgba(16, 185, 129, 0.38);
  background:
    linear-gradient(135deg, rgba(16, 185, 129, 0.14), rgba(45, 212, 191, 0.10)),
    rgba(255,255,255,0.95);
}

.toast-warning {
  border-color: rgba(245, 158, 11, 0.52);
  background:
    linear-gradient(135deg, rgba(245, 158, 11, 0.18), rgba(251, 191, 36, 0.12)),
    rgba(255,255,255,0.97);
  color: #7c3f00;
}

.toast-error {
  border-color: rgba(220, 38, 38, 0.48);
  background:
    linear-gradient(135deg, rgba(248, 113, 113, 0.18), rgba(220, 38, 38, 0.12)),
    rgba(255,255,255,0.97);
  color: #7f1d1d;
}

body.is-dark .toast {
  color: var(--ink);
  border-color: rgba(168, 204, 255, 0.18);
  background: rgba(13, 27, 47, 0.96);
  box-shadow: 0 20px 52px rgba(0,0,0,0.42);
}

body.is-dark .toast-info {
  background:
    linear-gradient(135deg, rgba(105, 168, 255, 0.18), rgba(106, 214, 255, 0.10)),
    rgba(13,27,47,0.96);
}

body.is-dark .toast-success {
  background:
    linear-gradient(135deg, rgba(16, 185, 129, 0.18), rgba(45, 212, 191, 0.10)),
    rgba(13,27,47,0.96);
}

body.is-dark .toast-warning {
  color: #fde68a;
  border-color: rgba(251, 191, 36, 0.42);
  background:
    linear-gradient(135deg, rgba(245, 158, 11, 0.18), rgba(251, 191, 36, 0.10)),
    rgba(13,27,47,0.96);
}

body.is-dark .toast-error {
  color: #fecaca;
  border-color: rgba(248, 113, 113, 0.42);
  background:
    linear-gradient(135deg, rgba(248, 113, 113, 0.18), rgba(220, 38, 38, 0.10)),
    rgba(13,27,47,0.96);
}

@media (max-width: 640px) {
  .toast-host {
    bottom: 18px;
  }

  .toast {
    font-size: 0.82rem;
    border-radius: 15px;
  }
}




/* v0.69 visible disabled download button */
.download-link.is-disabled {
  opacity: 0.62;
  filter: saturate(0.72);
  cursor: not-allowed;
}

.download-link.is-disabled:hover {
  transform: none;
  box-shadow: none;
}


/* v0.70 download button behavior and header title spacing */
.download-link {
  border: 2px solid rgba(16, 185, 129, 0.72);
  cursor: pointer;
}

.download-link.is-disabled {
  pointer-events: auto;
  cursor: not-allowed;
}

.app-header .eyebrow {
  margin-bottom: calc(0.18rem + 2px);
}


/* v0.72 prevent preview column growth in two-row / stacked layouts */
@media (max-width: 1180px) {
  .workspace {
    align-items: start;
  }

  .preview-panel {
    grid-column: 1 / -1;
    height: auto;
    min-height: 0;
    max-height: none;
    overflow: visible;
  }

  .preview-panel .canvas-wrap {
    height: auto !important;
    min-height: 280px !important;
    max-height: min(58vh, 520px);
  }

  .preview-controls {
    max-height: 360px;
  }
}

@media (max-width: 760px) {
  .preview-panel .canvas-wrap {
    min-height: 240px !important;
    max-height: none;
  }

  .preview-controls {
    max-height: none;
  }
}




/* v0.75 sample call button */
.sample-call-button {
  width: 100%;
  margin-top: 12px;
  padding: 0.9rem 1rem;
  border-radius: 999px;
  border: 1.5px solid rgba(59, 130, 246, 0.34);
  background: linear-gradient(135deg, rgba(238, 244, 255, 0.98), rgba(226, 236, 255, 0.98));
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.sample-call-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.48);
}

body.is-dark .sample-call-button {
  background: linear-gradient(135deg, rgba(29, 48, 86, 0.92), rgba(24, 37, 65, 0.92));
  border-color: rgba(96, 165, 250, 0.35);
  color: #cfe0ff;
}


/* v0.80 30FPS WebP export button */
.fps30-accent {
  background: linear-gradient(135deg, #7c3aed, #2563eb);
  color: #fff;
}


/* v0.81 output button tooltips */
.has-tooltip {
  position: relative;
}

.has-tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  z-index: 40;
  width: min(280px, 78vw);
  padding: 0.72rem 0.8rem;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.94);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.01em;
  text-align: left;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.24);
  transform: translateX(-50%) translateY(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.has-tooltip::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: calc(100% + 3px);
  z-index: 41;
  border: 7px solid transparent;
  border-top-color: rgba(15, 23, 42, 0.94);
  transform: translateX(-50%) translateY(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.has-tooltip:hover::after,
.has-tooltip:focus-visible::after,
.has-tooltip:hover::before,
.has-tooltip:focus-visible::before {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

body.is-dark .has-tooltip::after {
  background: rgba(226, 236, 255, 0.96);
  color: #172033;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.34);
}

body.is-dark .has-tooltip::before {
  border-top-color: rgba(226, 236, 255, 0.96);
}

@media (max-width: 640px) {
  .has-tooltip::after {
    width: min(240px, 86vw);
    font-size: 0.74rem;
  }
}


/* v0.82 language toggle */
.lang-toggle-button {
  min-width: 54px;
  font-weight: 900;
  letter-spacing: 0.04em;
}


/* v0.83 floating tooltip portal: avoids clipping inside scrollable preview controls */
.has-tooltip::before,
.has-tooltip::after {
  content: none !important;
  display: none !important;
}

.floating-tooltip {
  position: fixed;
  z-index: 9999;
  width: min(300px, calc(100vw - 24px));
  padding: 0.72rem 0.82rem;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.96);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 750;
  line-height: 1.45;
  letter-spacing: 0.01em;
  text-align: left;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.28);
  opacity: 0;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.floating-tooltip.is-visible {
  opacity: 1;
  transform: translateY(0);
}

body.is-dark .floating-tooltip {
  background: rgba(226, 236, 255, 0.97);
  color: #172033;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.36);
}

/* v0.83 keep the English lead line on one row in desktop header */
body[data-lang="en"] .title-block .lead {
  white-space: nowrap;
  font-size: clamp(0.78rem, 0.92vw, 0.98rem);
  letter-spacing: -0.012em;
}

@media (max-width: 860px) {
  body[data-lang="en"] .title-block .lead {
    white-space: normal;
    letter-spacing: normal;
  }
}


/* v0.87 60FPS WebP export button: purple to red accent */
.fps60-accent {
  background: linear-gradient(135deg, #8b5cf6, #c026d3 48%, #e11d48);
  color: #fff;
}


/* v0.88 export cancel state */
.output-actions .ghost-button.is-cancel {
  border-color: rgba(239, 68, 68, 0.55);
  color: #b91c1c;
  background: rgba(254, 226, 226, 0.9);
}
body.is-dark .output-actions .ghost-button.is-cancel {
  border-color: rgba(248, 113, 113, 0.45);
  color: #fecaca;
  background: rgba(127, 29, 29, 0.22);
}