:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #dfe5ef;

  --accent: #5967d8;
  --accent-dark: #424fc0;
  --danger: #d94b4b;
  --success: #22a06b;

  --shadow: 0 16px 40px rgba(35, 48, 78, 0.12);
  --shadow-soft: 0 10px 24px rgba(35, 48, 78, 0.08);

  --radius-xl: 22px;
  --radius-lg: 16px;
  --radius-md: 12px;

  --editor-min-height: 0px;
}

/* =========================================================
   Base
   ========================================================= */

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Noto Sans JP",
    "Yu Gothic",
    "YuGothic",
    "Hiragino Kaku Gothic ProN",
    "Meiryo",
    sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(114, 126, 255, .18), transparent 30%),
    radial-gradient(circle at 92% 10%, rgba(120, 190, 255, .16), transparent 28%),
    var(--bg);
}

button {
  border: 0;
  border-radius: 999px;
  padding: 10px 15px;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform .15s ease,
    box-shadow .15s ease,
    background .15s ease,
    border-color .15s ease;
}

button:hover {
  transform: translateY(-1px);
}

.app-shell {
  width: min(100%, 1280px);
  min-height: 100svh;
  margin: 0 auto;
  padding: 18px 22px 14px;
  display: grid;
  grid-template-rows: auto auto auto auto;
  gap: 14px;
}

/* =========================================================
   Header
   ========================================================= */

.site-header {
  position: relative;
  margin: 0;
  padding: 14px 18px 13px;
  border: 1px solid rgba(15, 23, 42, .10);
  border-radius: 28px;
  background: rgba(255, 255, 255, .90);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.header-inner {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.header-top-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  min-width: 0;
}

.portal-link,
.header-pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 750;
  line-height: 1.35;
  white-space: nowrap;
  text-decoration: none;
}

.portal-link {
  border: 1px solid rgba(15, 23, 42, .10);
  background: rgba(255, 255, 255, .68);
  color: #0ea5e9;
  box-shadow: 0 4px 14px rgba(15, 23, 42, .08);
  transition:
    transform 160ms ease,
    background 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.portal-link:hover {
  transform: translateY(-2px);
  border-color: rgba(29, 155, 240, .48);
  background: rgba(29, 155, 240, .12);
  box-shadow: 0 14px 28px rgba(29, 155, 240, .16);
}

.header-pill-cyan {
  border: 1px solid rgba(29, 155, 240, .30);
  background: rgba(29, 155, 240, .10);
  color: #0ea5e9;
}

.header-pill-violet {
  border: 1px solid rgba(124, 58, 237, .24);
  background: rgba(124, 58, 237, .10);
  color: #6d28d9;
}

.header-pill-amber {
  border: 1px solid rgba(217, 119, 6, .28);
  background: rgba(217, 119, 6, .10);
  color: #b45309;
}

.header-title-area {
  min-width: 0;
}

.site-title {
  margin: 0;
  color: var(--text);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -.025em;
}

.site-description {
  max-width: 980px;
  margin: 6px 0 0;
  color: #334155;
  font-size: 13.5px;
  line-height: 1.6;
}

.site-description span {
  display: block;
}

.description-line-2 {
  display: flex !important;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
}

.description-text {
  min-width: 0;
}

.header-version {
  flex: 0 0 auto;
  margin-left: auto;
  color: rgba(31, 41, 55, .36);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .03em;
  white-space: nowrap;
  user-select: none;
  pointer-events: none;
}



.header-x-logo {
  position: absolute;
  top: 16px;
  right: 18px;
  z-index: 5;
  width: 28px;
  height: 28px;
  padding: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  text-decoration: none;
  opacity: .82;
  transition: transform 160ms ease, opacity 160ms ease, filter 160ms ease;
}

.header-x-logo:hover {
  transform: translateY(-1px) scale(1.04);
  opacity: 1;
  filter: drop-shadow(0 5px 9px rgba(15, 23, 42, .16));
}

.header-x-logo svg {
  width: 22px;
  height: 22px;
  display: block;
}

.header-x-logo path {
  fill: #7b8492;
  stroke: rgba(255, 255, 255, .95);
  stroke-width: .85;
  stroke-linejoin: round;
}

/* =========================================================
   Status
   ========================================================= */

.status-note {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid rgba(15, 23, 42, .10);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .78);
  color: #526b86;
  font-size: 13px;
  line-height: 1.6;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* =========================================================
   Main Layout
   ========================================================= */

.main {
  min-width: 0;
  min-height: 0;
  height: var(--main-fit-height, calc(100svh - 232px));
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: stretch;
}

@media (min-width: 900px) {
  .main {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

.container {
  min-width: 0;
  min-height: 0;
  height: 100%;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  border: 1px solid rgba(15, 23, 42, .10);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, .90);
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.container h2 {
  min-height: 54px;
  margin: 0;
  padding: 16px 18px 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text);
  font-size: 16px;
  font-weight: 900;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #f7f8ff);
}

.container h2::after {
  content: "";
  width: 34px;
  height: 20px;
  border-radius: 999px;
  background: #eef2ff;
  border: 1px solid #dce2ff;
}

/* =========================================================
   Textareas
   ========================================================= */

.text-area-wrap {
  display: flex;
  min-height: 0;
  height: 100%;
  padding: 18px 20px 12px;
}

textarea {
  display: block;
  width: 100%;
  height: 100%;
  min-height: var(--editor-min-height);
  resize: none;
  padding: 18px 18px 18px 22px;
  color: #243247;
  background: #ffffff;
  border: 1px solid #d8e5f2;
  border-radius: 6px;
  font-family:
    "BIZ UDPGothic",
    "Yu Gothic",
    "YuGothic",
    "Meiryo",
    "Consolas",
    monospace;
  font-size: 13px;
  line-height: 1.72;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .9);
  transition:
    border-color .2s ease,
    box-shadow .2s ease,
    transform .2s ease;
}

textarea::placeholder {
  color: rgba(36, 50, 71, .5);
  opacity: 1;
}

textarea:focus {
  outline: none;
  border-color: #aeb8ff;
  box-shadow:
    0 0 0 4px rgba(89, 103, 216, .14),
    0 10px 28px rgba(89, 103, 216, .07),
    inset 0 1px 0 rgba(255, 255, 255, .95);
  transform: translateY(-1px);
}

#output {
  background: #fffdf8;
  border-color: #e4dccf;
}

/* =========================================================
   Action Rows
   ========================================================= */

.input-action-row,
.action-row {
  min-height: 0;
  height: auto;
  padding: 8px 20px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.edition-control {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  border: 1px solid #dce2ff;
  border-radius: 999px;
  background: #eef2ff;
}

.edition-label {
  color: #4b5563;
  font-size: 12px;
  font-weight: 900;
  white-space: nowrap;
}

.edition-toggle {
  display: inline-flex;
  gap: 4px;
}

.edition-toggle button {
  min-width: 64px;
  min-height: 30px;
  margin: 0;
  padding: 6px 10px;
  border-radius: 999px;
  background: transparent;
  color: #617389;
  border: none;
  box-shadow: none;
  font-size: 12px;
  font-weight: 900;
}

.edition-toggle button:hover {
  transform: none;
  background: rgba(255, 255, 255, .72);
  box-shadow: none;
}

.edition-toggle button.active {
  background: #ffffff;
  color: var(--accent-dark);
  box-shadow: 0 4px 12px rgba(89, 103, 216, .16);
}

#formatButton {
  min-width: 150px;
  min-height: 44px;
  color: #ffffff;
  background: var(--accent);
  box-shadow: 0 10px 22px rgba(89, 103, 216, .24);
}

#formatButton:hover {
  background: var(--accent-dark);
}

#copyButton {
  min-width: 130px;
  min-height: 44px;
  color: #1f6f59;
  background: #e9f8f2;
  border: 1px solid #bfe7d9;
  box-shadow: 0 6px 14px rgba(51, 137, 111, .10);
}

#copyButton:hover {
  background: #dcf4eb;
}

.btn-clear {
  min-width: 130px;
  min-height: 44px;
  color: #475569;
  background: #f5f7fa;
  border: 1px solid #d8e0ea;
  box-shadow: 0 6px 14px rgba(100, 116, 139, .08);
}

.btn-clear:hover {
  background: #edf1f6;
}

/* =========================================================
   Footer
   ========================================================= */

.app-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 8px 14px;
  border: 1px solid rgba(15, 23, 42, .10);
  border-radius: 18px;
  background: rgba(255, 255, 255, .76);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 760px) {
  .app-shell {
    padding: 12px;
    gap: 10px;
  }

  .site-header {
    padding: 14px 14px 13px;
    border-radius: 22px;
  }

  .header-top-tags {
    gap: 5px;
  }

  .site-title {
    font-size: 24px;
  }

  .site-description {
    font-size: 13px;
  }

  .main {
    height: auto;
  }

  .container {
    min-height: 420px;
  }

  .text-area-wrap {
    height: auto;
    padding: 16px 16px 10px;
  }

  textarea {
    height: auto;
    min-height: 300px;
    padding: 16px 16px 16px 20px;
  }

  .input-action-row,
  .action-row {
    flex-direction: column;
    align-items: stretch;
    height: auto;
    min-height: auto;
    padding: 8px 16px 18px;
  }

  .edition-control {
    flex-direction: column;
    align-items: stretch;
    border-radius: 16px;
  }

  .edition-toggle {
    width: 100%;
  }

  .edition-toggle button {
    flex: 1;
    width: auto;
  }

  #formatButton,
  #copyButton,
  .btn-clear {
    width: 100%;
  }
}

/* v2.53 adjustments */
.site-description {
  max-width: none;
  padding-right: 54px;
}

.header-version {
  position: absolute;
  right: 18px;
  bottom: 13px;
  margin-left: 0;
  text-align: right;
}

.output-panel h2.output-title-row,
.output-panel h2.output-panel-title {
  justify-content: flex-start;
  gap: 12px;
}

.output-panel h2.output-title-row::after,
.output-panel h2.output-panel-title::after {
  content: none;
}

.command-add-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid rgba(89, 103, 216, .18);
  border-radius: 999px;
  background: rgba(238, 242, 255, .78);
  color: #4f5fc8;
  font-size: 11.5px;
  font-weight: 900;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

.command-add-toggle input {
  width: 13px;
  height: 13px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.app-footer {
  display: block;
  min-height: auto;
  padding: 10px 14px 11px;
  text-align: left;
  color: #64748b;
  font-size: 10.8px;
  font-weight: 600;
  line-height: 1.55;
}

.app-footer h2 {
  margin: 0 0 4px;
  color: #475569;
  font-size: 12px;
  font-weight: 900;
  line-height: 1.3;
}

.app-footer p {
  margin: 4px 0 0;
}

.app-footer a {
  color: #64748b;
  font-weight: 900;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.app-footer a:hover {
  color: #475569;
}

@media (max-width: 760px) {
  .site-description {
    padding-right: 34px;
  }

  .description-line-2 {
    flex-wrap: wrap;
    gap: 2px 10px;
  }

  .header-version {
    right: 14px;
    bottom: 11px;
    width: auto;
    margin-left: 0;
    text-align: right;
    font-size: 10.5px;
  }

  .output-panel h2.output-title-row,
  .output-panel h2.output-panel-title {
    gap: 8px;
  }

  .command-add-toggle {
    padding: 4px 8px;
    font-size: 11px;
  }
}


/* v2.53 viewport fit adjustments */
.main {
  height: var(--main-fit-height, calc(100svh - 232px));
}

.container,
.text-area-wrap,
textarea {
  min-height: 0;
}

.app-footer {
  margin-top: 2px;
}

@media (min-width: 761px) {
  .app-shell {
    min-height: 100svh;
  }
}

@media (max-width: 760px) {
  .main {
    height: auto !important;
  }
}