:root {
  color-scheme: light;
  --page: #eaf0eb;
  --surface: #ffffff;
  --surface-soft: #f1f6f2;
  --ink: #0d2018;
  --muted: #526b5e;
  --line: #c8d8ce;
  --line-soft: #dce7e0;
  --green: #0c4a35;
  --green-dark: #063122;
  --green-pale: #dbe9e0;
  --green-tint: #ebf4ee;
  --gold: #b27926;
  --gold-dark: #774c10;
  --gold-pale: #f6ebdc;
  --font: 'Segoe UI', 'Aptos', Arial, sans-serif;
  --display: 'Segoe UI', 'Aptos Display', Arial, sans-serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --page: #0c0e0d;
  --surface: #141716;
  --surface-soft: #1b201d;
  --ink: #f0f4f2;
  --muted: #8e9e96;
  --line: #29332e;
  --line-soft: #1f2723;
  --green: #10b981;
  --green-dark: #34d399;
  --green-pale: rgba(16, 185, 129, 0.16);
  --green-tint: rgba(16, 185, 129, 0.08);
  --gold: #f59e0b;
  --gold-dark: #fbbf24;
  --gold-pale: rgba(245, 158, 11, 0.16);
}

[data-theme="dark"] body {
  background:
    radial-gradient(ellipse at 4% 0%, rgba(16, 185, 129, .06), transparent 32rem),
    radial-gradient(ellipse at 96% 28%, rgba(245, 158, 11, .04), transparent 28rem),
    var(--page);
}

[data-theme="dark"] .copy-button,
[data-theme="dark"] .modal-btn {
  background: #10b981;
  color: #062317;
  font-weight: 800;
}
[data-theme="dark"] .copy-button:hover:not(:disabled),
[data-theme="dark"] .modal-btn:hover:not(:disabled) {
  background: #34d399;
  color: #062317;
}

[data-theme="dark"] .tool-shelf {
  background: linear-gradient(135deg, #101412 0%, #151a17 55%, #19221d 100%);
  border: 1px solid #243029;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .45);
}
[data-theme="dark"] .overview-item {
  border: 1px solid rgba(255, 255, 255, .08);
  background: rgba(255, 255, 255, .03);
}
[data-theme="dark"] .overview-item:hover {
  border-color: rgba(16, 185, 129, .5);
  background: rgba(16, 185, 129, .08);
}
[data-theme="dark"] .shelf-decoration {
  border-color: rgba(255, 255, 255, .1);
  background: rgba(255, 255, 255, .04);
  color: #8e9e96;
}
[data-theme="dark"] .shelf-decoration i {
  border-color: #151a17;
  background: var(--gold);
  color: #2e1a05;
}

[data-theme="dark"] .diff-body ins {
  background: rgba(16, 185, 129, .2);
  color: #34d399;
  border-bottom: 1px solid #10b981;
}
[data-theme="dark"] .diff-body del {
  background: rgba(239, 68, 68, .2);
  color: #f87171;
}
[data-theme="dark"] .legend-add::before {
  background: rgba(16, 185, 129, .5);
}
[data-theme="dark"] .legend-del::before {
  background: rgba(239, 68, 68, .5);
}
[data-theme="dark"] .modal-backdrop {
  background: rgba(0, 0, 0, .75);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(ellipse at 4% 0%, rgba(12, 74, 53, .13), transparent 30rem),
    radial-gradient(ellipse at 96% 28%, rgba(178, 121, 38, .09), transparent 28rem),
    var(--page);
  color: var(--ink);
  font-family: var(--font);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea { font: inherit; }
button { color: inherit; }
button:focus-visible, a:focus-visible, summary:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 3px;
}
a { color: inherit; text-decoration: none; }

.site-header {
  min-height: 64px;
  padding: 0 clamp(18px, 5vw, 76px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  transition: background .15s ease, border-color .15s ease;
}
.header-actions { display: flex; align-items: center; gap: 14px; }
.theme-toggle {
  width: 31px; height: 31px; display: inline-grid; place-items: center;
  border: 1px solid var(--line); border-radius: 7px; background: var(--surface-soft);
  color: var(--ink); font-size: 13px; cursor: pointer; transition: background .14s ease, border-color .14s ease, transform .14s ease;
}
.theme-toggle:hover { background: var(--green-pale); border-color: var(--green); transform: scale(1.05); }
.brand-lockup { display: flex; align-items: center; gap: 13px; min-width: 0; }
.brand { display: inline-flex; flex: 0 0 auto; gap: 9px; align-items: center; font-family: var(--display); font-weight: 800; font-size: 19px; letter-spacing: -1px; }
.brand-period { color: var(--green); }
.brand-mark { position: relative; display: block; width: 30px; height: 27px; }
.brand-mark > span {
  position: absolute; left: 0; top: 0; width: 21px; height: 23px;
  display: grid; place-items: center; border: 1px solid var(--line); border-radius: 7px;
  background: var(--green-pale); color: var(--green); font-family: var(--display); font-size: 13px; font-weight: 800;
}
.brand-mark i {
  position: absolute; right: 0; bottom: 0; width: 16px; height: 16px;
  display: grid; place-items: center; border: 2px solid var(--surface); border-radius: 6px;
  background: var(--gold); color: #2e1a05; font-family: var(--display); font-size: 10px; font-style: normal; font-weight: 800; line-height: 1;
}
.brand-divider { width: 1px; height: 19px; background: var(--line); }
.brand-tagline { margin: 0; color: var(--muted); font-size: 11px; font-weight: 500; letter-spacing: 0; }
.header-link { display: inline-flex; align-items: center; gap: 7px; color: var(--green-dark); font-size: 11px; font-weight: 700; }
.header-link:hover { color: var(--green); }
.page-shell { width: min(1260px, calc(100% - 40px)); margin: 15px auto 0; }

.workbench { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); box-shadow: 0 13px 34px rgba(0, 0, 0, .07); }
.mode-switch { min-height: 51px; padding: 0 23px; display: flex; align-items: stretch; gap: 23px; border-bottom: 1px solid var(--line); background: var(--surface); }
.mode-switch-button {
  position: relative; display: inline-flex; align-items: center; gap: 8px; padding: 0 2px;
  border: 0; background: transparent; color: var(--muted); font-size: 11px; font-weight: 600; cursor: pointer;
}
.mode-switch-button[aria-selected="true"] { color: var(--green-dark); }
.mode-switch-button[aria-selected="true"]::after { content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 3px; border-radius: 3px 3px 0 0; background: var(--green); }
.mode-switch-icon { width: 21px; height: 21px; display: grid; place-items: center; border-radius: 6px; background: var(--green-pale); color: var(--green-dark); font-size: 9px; font-weight: 800; letter-spacing: -.08em; }
.document-icon { background: var(--gold-pale); color: var(--gold-dark); font-size: 12px; }
.draft-tab-badge { padding: 3px 6px; border-radius: 20px; background: var(--green-pale); color: var(--green-dark); font-size: 8px; font-weight: 700; }
.draft-tab-badge[hidden] { display: none; }
.mode-view[hidden] { display: none !important; }

/* Long-form editor is the main workspace. */
.document-mode-view { padding: 0 25px; background: var(--surface); }
.document-heading { min-height: 95px; padding: 15px 0 13px; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.document-heading .eyebrow { margin: 0 0 5px; color: var(--green); font-size: 9px; font-weight: 700; }
.document-heading h2 { margin: 0 0 5px; color: var(--ink); font-family: var(--display); font-size: 19px; letter-spacing: -.04em; }
.document-heading p:not(.eyebrow) { max-width: 590px; margin: 0; color: var(--muted); font-size: 10px; line-height: 1.5; }
.document-key { min-width: 87px; padding: 8px 9px; display: flex; flex-direction: column; align-items: center; gap: 2px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-soft); color: var(--muted); font-size: 8px; }
.document-key b { color: var(--gold-dark); font-size: 14px; font-weight: 600; transform: rotate(90deg); }
.document-toolbar { min-height: 46px; padding: 0 13px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border: 1px solid var(--line); border-bottom: 0; border-radius: 8px 8px 0 0; background: var(--surface-soft); }
.document-name, .document-actions { display: flex; align-items: center; gap: 9px; }
.document-file-icon { color: var(--green); font-size: 14px; }
.document-name strong { color: var(--ink); font-size: 10px; font-weight: 700; }
.document-action { display: inline-flex; align-items: center; gap: 5px; padding: 6px 5px; border: 0; border-radius: 4px; background: transparent; color: var(--muted); font-size: 12px; cursor: pointer; }
.document-action span { font-size: 9px; }
.document-action:hover:not(:disabled) { background: var(--green-pale); color: var(--green-dark); }
.document-action:disabled { opacity: .42; cursor: not-allowed; }
.clear-document { font-size: 9px; }
.toolbar-divider { width: 1px; height: 19px; background: var(--line); }
.editor-instructions { min-height: 36px; padding: 0 12px; display: flex; align-items: center; gap: 8px; border-left: 1px solid var(--line); border-right: 1px solid var(--line); background: var(--surface-soft); color: var(--muted); font-size: 9px; }
.editor-instructions strong { color: var(--green-dark); font-weight: 700; }
.instruction-mark { color: var(--gold-dark); font-size: 15px; }
.selection-status { margin-left: auto; color: var(--muted); white-space: nowrap; }
.document-editor-wrap { position: relative; }
.document-editor {
  display: block; width: 100%; height: min(76vh, 760px); min-height: 620px; resize: vertical;
  padding: 30px clamp(24px, 8vw, 105px); border: 1px solid var(--line); border-top: 0; border-radius: 0 0 8px 8px;
  outline: none; background-color: var(--surface);
  background-image: repeating-linear-gradient(transparent 0 31px, var(--line-soft) 31px 32px);
  color: var(--ink); font-family: var(--font); font-size: 14px; line-height: 2.3; tab-size: 2;
  transition: border-color .15s ease, background-color .15s ease;
}
.document-editor:focus { border-color: var(--green); box-shadow: inset 0 0 0 1px var(--green); }
.document-editor::placeholder { color: var(--muted); opacity: 0.7; }
.drag-active {
  border: 2px dashed var(--green) !important;
  background-color: var(--green-tint) !important;
}
.document-footer { min-height: 43px; padding: 0 3px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.document-stats { display: flex; flex-wrap: wrap; gap: 16px; color: var(--muted); font-size: 9px; }
.document-stats strong { color: var(--ink); font-size: 10px; }
.draft-status { color: var(--muted); font-size: 9px; white-space: nowrap; }
.document-status { color: var(--muted); font-size: 9px; text-align: right; }

/* The contextual actions keep each edit local to the selected text. */
.selection-menu {
  position: fixed; z-index: 50; width: 290px; max-height: min(520px, calc(100vh - 20px));
  display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); box-shadow: 0 15px 45px rgba(0, 0, 0, .26), 0 2px 7px rgba(0, 0, 0, .12);
}
.selection-menu[hidden] { display: none; }
.selection-menu-heading { min-height: 38px; padding: 0 11px 0 14px; display: flex; align-items: center; justify-content: space-between; color: var(--ink); font-size: 10px; font-weight: 700; border-bottom: 1px solid var(--line-soft); }
.selection-menu-heading button { width: 23px; height: 23px; border: 0; border-radius: 6px; background: transparent; color: var(--muted); font-size: 17px; cursor: pointer; }
.selection-menu-heading button:hover { background: var(--green-pale); color: var(--green-dark); }
.selection-menu-preview { margin: 8px 10px 8px; padding: 7px 9px; overflow: hidden; border-left: 2px solid var(--green); border-radius: 0 5px 5px 0; background: var(--surface-soft); color: var(--muted); font-size: 9px; line-height: 1.5; text-overflow: ellipsis; white-space: nowrap; }
.selection-menu-tabs { min-height: 34px; padding: 0 9px; display: flex; gap: 4px; border-bottom: 1px solid var(--line-soft); }
.selection-menu-tabs button { position: relative; padding: 0 6px; border: 0; background: transparent; color: var(--muted); font-size: 9px; font-weight: 600; cursor: pointer; }
.selection-menu-tabs button[aria-selected="true"] { color: var(--green-dark); }
.selection-menu-tabs button[aria-selected="true"]::after { content: ''; position: absolute; bottom: -1px; left: 5px; right: 5px; height: 2px; border-radius: 2px; background: var(--green); }
.selection-menu-items { padding: 5px; overflow: auto; overscroll-behavior: contain; }
.selection-menu-item { width: 100%; min-height: 34px; padding: 5px 8px; display: flex; align-items: center; justify-content: space-between; gap: 9px; border: 0; border-radius: 5px; background: transparent; color: var(--ink); text-align: left; cursor: pointer; }
.selection-menu-item:hover, .selection-menu-item:focus-visible { outline: none; background: var(--green-pale); color: var(--green-dark); }
.selection-menu-item strong { font-size: 9px; font-weight: 600; }
.selection-menu-item span { color: var(--muted); font-size: 8px; text-align: right; }
.selection-menu-footer { min-height: 28px; padding: 0 11px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line-soft); color: var(--muted); font-size: 8px; }
.selection-menu-footer kbd { padding: 2px 4px; font-size: 8px; }

/* Quick conversion stays available as the alternate workspace. */
.workflow-guide { min-height: 64px; padding: 0 24px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--line-soft); background: var(--surface-soft); }
.workflow-step { display: flex; align-items: center; gap: 8px; min-width: max-content; }
.workflow-step > span:last-child { display: flex; flex-direction: column; gap: 2px; }
.step-number { width: 25px; height: 25px; display: grid; place-items: center; border-radius: 8px; background: var(--green-pale); color: var(--green-dark); font-size: 10px; font-weight: 700; }
.workflow-step:nth-of-type(2) .step-number { background: var(--gold-pale); color: var(--gold-dark); }
.workflow-step:nth-of-type(3) .step-number { background: var(--green-pale); color: var(--green-dark); }
.workflow-step strong { color: var(--ink); font-size: 9px; font-weight: 700; }
.workflow-step small { color: var(--muted); font-size: 8px; }
.workflow-connector { flex: 0 1 42px; height: 1px; background: repeating-linear-gradient(90deg, var(--line) 0 3px, transparent 3px 6px); }
.workflow-live { display: inline-flex; align-items: center; gap: 7px; margin-left: auto; color: var(--muted); font-size: 9px; white-space: nowrap; }
.workflow-live i, .live-preview i { width: 6px; height: 6px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 3px var(--green-pale); }
.tool-navigation { min-height: 54px; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line-soft); }
.category-tabs { height: 54px; display: flex; align-items: stretch; gap: 22px; }
.category-tab { position: relative; display: inline-flex; align-items: center; gap: 7px; padding: 2px 0 0; border: 0; background: transparent; color: var(--muted); font-size: 11px; font-weight: 600; cursor: pointer; }
.category-tab[aria-selected="true"] { color: var(--green-dark); }
.category-tab[aria-selected="true"]::after { content: ''; position: absolute; right: 0; bottom: -1px; left: 0; height: 3px; border-radius: 3px 3px 0 0; background: var(--green); }
.category-icon { width: 20px; height: 20px; display: grid; place-items: center; border-radius: 6px; background: var(--green-pale); color: var(--green-dark); font-size: 9px; font-weight: 800; letter-spacing: -.06em; }
.category-tab[data-category="transform"] .category-icon { background: var(--gold-pale); color: var(--gold-dark); }
.category-tab[data-category="style"] .category-icon { background: var(--green-pale); color: var(--green-dark); }
.category-tab[data-category="encode"] .category-icon { background: var(--green-pale); color: var(--green-dark); }
.keyboard-hint { color: var(--muted); font-size: 9px; }
kbd { padding: 3px 4px; border: 1px solid var(--line); border-radius: 4px; background: var(--surface); color: var(--muted); font-family: var(--font); font-size: 8px; margin: 0 1px; }
.tool-picker { min-height: 59px; padding: 13px 24px; display: flex; gap: 7px; flex-wrap: wrap; border-bottom: 1px solid var(--line-soft); }
.tool-chip { display: inline-flex; align-items: center; gap: 7px; padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--muted); font-size: 10px; font-weight: 600; cursor: pointer; transition: background .14s ease, border-color .14s ease, color .14s ease; }
.tool-chip::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--muted); }
.tool-chip:hover { border-color: var(--green); background: var(--surface-soft); color: var(--ink); }
.tool-chip[aria-pressed="true"] { border-color: var(--green); background: var(--green-pale); color: var(--green-dark); }
.tool-chip[aria-pressed="true"]::before { background: var(--green); box-shadow: 0 0 0 3px var(--green-tint); }
.selection-context { min-height: 51px; padding: 7px 24px; display: flex; align-items: center; gap: 10px; border-top: 1px solid var(--line-soft); background: var(--surface-soft); }
.selection-symbol { width: 27px; height: 27px; display: grid; place-items: center; border-radius: 8px; background: var(--green-pale); color: var(--green-dark); font-family: var(--display); font-size: 10px; font-weight: 800; letter-spacing: -.07em; }
.selection-copy { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.selection-copy strong { color: var(--ink); font-size: 9px; }
.selection-copy span { color: var(--muted); font-size: 9px; }
.live-preview { display: inline-flex; align-items: center; gap: 7px; margin-left: auto; color: var(--muted); font-size: 8px; white-space: nowrap; }
.encode-controls { min-height: 48px; padding: 8px 24px; display: flex; align-items: center; gap: 12px; border-top: 1px solid var(--line-soft); background: var(--surface-soft); color: var(--muted); font-size: 9px; }
.encode-controls[hidden] { display: none; }
.direction-label { color: var(--ink); font-size: 9px; font-weight: 700; }
.direction-toggle { display: inline-flex; padding: 3px; background: var(--surface-soft); border: 1px solid var(--line); border-radius: 6px; gap: 2px; }
.direction-toggle button { padding: 5px 8px; border: 0; border-radius: 4px; background: transparent; color: var(--muted); font-size: 9px; cursor: pointer; }
.direction-toggle button[aria-pressed="true"] { background: var(--surface); color: var(--green-dark); box-shadow: 0 1px 3px rgba(0, 0, 0, .14); }
.direction-help { margin-left: auto; color: var(--muted); }
.panels { display: grid; grid-template-columns: minmax(0, 1fr) 38px minmax(0, 1fr); padding: 18px 24px 22px; }
.text-panel { min-width: 0; height: 292px; display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.input-panel { border-top: 3px solid var(--green); }
.result-panel { border-color: var(--line); border-top: 3px solid var(--gold); background: var(--surface-soft); }
.panel-heading { min-height: 49px; padding: 0 13px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line-soft); }
.panel-heading > div:first-child { display: flex; align-items: center; gap: 8px; }
.panel-heading-actions { display: flex; align-items: center; gap: 10px; }
.panel-index { width: 19px; height: 19px; display: inline-grid; place-items: center; border-radius: 6px; background: var(--green-pale); color: var(--green-dark); font-size: 9px; font-weight: 700; }
.result-index { background: var(--gold-pale); color: var(--gold-dark); }
.panel-heading h2 { margin: 0; color: var(--ink); font-family: var(--display); font-size: 11px; font-weight: 700; }
.text-panel textarea { display: block; width: 100%; min-height: 0; flex: 1; resize: none; padding: 15px; border: 0; background: transparent; color: var(--ink); font-size: 12px; line-height: 1.75; outline: none; transition: background-color .15s ease; }
.text-panel textarea:focus-visible { outline: none; }
.text-panel textarea::placeholder { color: var(--muted); opacity: 0.7; }
.result-panel textarea { color: var(--green-dark); }
.panel-footer { min-height: 39px; padding: 0 12px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--line-soft); background: var(--surface-soft); color: var(--muted); }
.result-panel .panel-footer { background: var(--surface-soft); }
.text-stats { display: flex; gap: 13px; font-size: 9px; }
.text-stats strong { color: var(--ink); font-weight: 600; }
.quiet-action { display: inline-flex; align-items: center; gap: 5px; padding: 5px 2px; border: 0; background: transparent; color: var(--muted); font-size: 9px; cursor: pointer; }
.quiet-action:hover:not(:disabled) { color: var(--green-dark); }
.quiet-action span { font-size: 12px; }
.quiet-action:disabled, .icon-action:disabled { opacity: .4; cursor: not-allowed; }
.file-action { cursor: pointer; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.transfer-rail { display: flex; justify-content: center; align-items: center; color: var(--muted); font-size: 16px; }
.transfer-rail span { width: 25px; height: 25px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: var(--surface-soft); }
.result-actions { display: flex; align-items: center; gap: 5px; }
.icon-action { width: 25px; height: 25px; border: 0; border-radius: 5px; background: transparent; color: var(--muted); font-size: 16px; cursor: pointer; }
.icon-action:hover { background: var(--green-pale); color: var(--green-dark); }
.copy-button { display: inline-flex; align-items: center; gap: 6px; padding: 7px 10px; border: 0; border-radius: 5px; background: var(--green); color: #fff; font-size: 9px; font-weight: 700; cursor: pointer; transition: background .14s ease; }
.copy-button:hover:not(:disabled) { background: var(--green-dark); }
.copy-button:disabled { opacity: .4; cursor: not-allowed; }
.copy-icon { font-size: 11px; line-height: 10px; }
.result-status { color: var(--green-dark); font-size: 9px; }
.result-footer-actions { display: flex; align-items: center; gap: 12px; }
.play-action { color: var(--green-dark); }
.play-action[hidden] { display: none; }
.play-action.playing {
  color: #e5484d;
  font-weight: 700;
  animation: pulse-morse 1s infinite alternate;
}
@keyframes pulse-morse {
  from { opacity: 0.75; transform: scale(0.98); }
  to { opacity: 1; transform: scale(1.02); }
}
.options { border-top: 1px solid var(--line-soft); color: var(--muted); }
.options summary { min-height: 37px; padding: 0 24px; display: flex; justify-content: space-between; align-items: center; list-style: none; cursor: pointer; font-size: 9px; }
.options summary::-webkit-details-marker { display: none; }
.summary-plus { color: var(--muted); font-size: 15px; font-weight: 300; }
.options[open] .summary-plus { transform: rotate(45deg); }
.options-content { padding: 0 24px 15px; }
.options-content label { display: block; margin-bottom: 6px; color: var(--ink); font-size: 9px; font-weight: 600; }
.options-content input { width: min(100%, 440px); padding: 8px 10px; border: 1px solid var(--line); border-radius: 5px; outline: none; background: var(--surface); color: var(--ink); font-size: 10px; }
.options-content p { margin: 5px 0 0; color: var(--muted); font-size: 9px; }

/* Secondary tools live in a contrasting evergreen shelf. */
.tools-section { padding: 46px 0 40px; }
.tool-shelf { position: relative; overflow: hidden; padding: 30px 30px 27px; border-radius: 13px; background: linear-gradient(135deg, #091c14 0%, #0e2a1f 55%, #143729 100%); border: 1px solid rgba(40, 95, 70, .28); box-shadow: 0 18px 40px rgba(4, 16, 11, .28); }
.tool-shelf::before { content: ''; position: absolute; top: -80px; right: 3%; width: 220px; height: 220px; border-radius: 50%; background: rgba(151, 195, 144, .08); }
.tool-shelf::after { content: ''; position: absolute; right: 12%; bottom: -120px; width: 190px; height: 190px; border-radius: 50%; background: rgba(201, 147, 61, .09); }
.section-heading { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 19px; }
.section-heading .eyebrow { margin: 0 0 7px; color: #b8d3b6; font-size: 9px; font-weight: 700; }
.section-heading h2 { margin: 0; color: #fff; font-family: var(--display); font-size: 23px; letter-spacing: -.045em; }
.section-heading > p { width: 270px; margin: 0 5px 2px 0; color: #c4d6c7; font-size: 10px; line-height: 1.6; }
.tool-overview { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.overview-item { min-height: 102px; padding: 13px 13px 11px; border: 1px solid rgba(255,255,255,.16); border-radius: 7px; background: rgba(255,255,255,.055); text-align: left; cursor: pointer; transition: background .15s ease, transform .15s ease; }
.overview-item::before { content: ''; display: block; width: 17px; height: 3px; margin-bottom: 11px; border-radius: 4px; background: #e8a34d; }
.overview-item:nth-child(4n + 2)::before { background: #a8ce9e; }
.overview-item:nth-child(4n + 3)::before { background: #d4ba78; }
.overview-item:nth-child(4n)::before { background: #89b99a; }
.overview-item:hover { transform: translateY(-2px); border-color: rgba(225, 241, 221, .42); background: rgba(255,255,255,.11); }
.overview-item strong { display: block; margin-bottom: 5px; color: #f4f8f1; font-family: var(--display); font-size: 10px; font-weight: 700; }
.overview-item p { margin: 0; color: #c6d8c8; font-size: 8px; line-height: 1.55; }
.shelf-decoration { position: absolute; z-index: 1; right: 26px; bottom: 20px; width: 65px; height: 73px; display: grid; place-items: center; transform: rotate(7deg); border: 1px solid rgba(221, 239, 216, .3); border-radius: 13px; background: rgba(255,255,255,.08); color: #e0eddd; font-family: var(--display); font-size: 22px; font-weight: 800; letter-spacing: -.1em; }
.shelf-decoration i { position: absolute; right: -9px; top: -12px; width: 23px; height: 23px; display: grid; place-items: center; border: 2px solid #143729; border-radius: 7px; background: var(--gold); color: #2e1a05; font-size: 12px; font-style: normal; }
.site-footer { min-height: 63px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); color: var(--muted); font-size: 9px; }
.footer-brand { font-size: 15px; }
.footer-brand .brand-mark { width: 26px; height: 23px; }
.footer-brand .brand-mark > span { width: 19px; height: 21px; font-size: 11px; }
.footer-brand .brand-mark i { width: 15px; height: 15px; }
.footer-credit { display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center; }
.footer-credit strong { color: var(--ink); font-weight: 700; }
.footer-version { padding: 2px 6px; border: 1px solid var(--line); border-radius: 20px; color: var(--muted); font-size: 8px; line-height: 1.2; }
.footer-actions { display: flex; align-items: center; gap: 13px; }
.github-button { min-height: 29px; padding: 0 9px; display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--green-dark); font-size: 9px; font-weight: 700; white-space: nowrap; }
.github-button:hover { border-color: var(--green); background: var(--green-pale); }
.github-button svg { width: 14px; height: 14px; }
.back-to-top { color: var(--green-dark); font-weight: 700; white-space: nowrap; }

@media (max-width: 800px) {
  .site-header { min-height: 58px; padding: 0 18px; }
  .page-shell { width: min(100% - 28px, 650px); margin-top: 11px; }
  .document-mode-view { padding: 0 14px; }
  .document-heading { min-height: 87px; padding: 12px 0; }
  .document-heading h2 { font-size: 17px; }
  .document-editor { height: 68vh; min-height: 500px; padding: 24px 22px; font-size: 13px; line-height: 2.15; background-size: auto 28px; }
  .document-toolbar { padding: 0 8px; }
  .document-actions { gap: 4px; }
  .document-action { gap: 3px; padding: 6px 4px; font-size: 11px; }
  .editor-instructions { padding: 7px 9px; flex-wrap: wrap; }
  .selection-status { margin-left: 23px; }
  .document-footer { align-items: flex-start; flex-direction: column; padding: 8px 2px; gap: 5px; }
  .document-status { text-align: left; }
  .workflow-guide { padding: 0 14px; gap: 8px; }
  .workflow-connector { flex-basis: 20px; }
  .workflow-live { display: none; }
  .tool-navigation { padding: 0 14px; }
  .category-tabs { gap: 15px; overflow: auto; scrollbar-width: none; }
  .category-tabs::-webkit-scrollbar { display: none; }
  .category-tab { flex: 0 0 auto; font-size: 10px; }
  .tool-picker { padding: 11px 14px; gap: 5px; }
  .tool-chip { padding: 6px 8px; font-size: 9px; }
  .selection-context { padding: 7px 14px; }
  .selection-copy { flex-direction: column; align-items: flex-start; gap: 2px; }
  .selection-copy strong, .selection-copy span { font-size: 8px; }
  .panels { grid-template-columns: minmax(0, 1fr); padding: 12px 14px 15px; gap: 9px; }
  .text-panel { height: 220px; }
  .transfer-rail { height: 13px; }
  .transfer-rail span { width: 21px; height: 21px; transform: rotate(90deg); font-size: 14px; }
  .encode-controls { padding: 9px 14px; flex-wrap: wrap; gap: 8px; }
  .direction-help { display: none; }
  .section-heading { display: block; }
  .section-heading > p { width: auto; max-width: 320px; margin: 8px 0 0; }
  .tool-shelf { padding: 24px 18px 20px; }
  .tool-overview { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shelf-decoration { display: none; }
}
@media (max-width: 460px) {
  .site-header { padding: 0 13px; }
  .brand-lockup { gap: 8px; }
  .brand { gap: 7px; font-size: 17px; }
  .brand-tagline { max-width: 108px; font-size: 9px; line-height: 1.3; }
  .brand-divider { height: 16px; }
  .header-link { gap: 4px; font-size: 9px; }
  .page-shell { width: calc(100% - 20px); }
  .mode-switch { min-height: 47px; padding: 0 12px; gap: 15px; }
  .mode-switch-button { gap: 6px; font-size: 9px; }
  .mode-switch-icon { width: 18px; height: 18px; }
  .document-heading { align-items: flex-start; }
  .document-heading h2 { font-size: 16px; }
  .document-key { min-width: 60px; padding: 7px 4px; font-size: 7px; }
  .document-editor { height: 65vh; min-height: 460px; padding: 20px 15px; }
  .document-toolbar { flex-wrap: wrap; padding-top: 6px; padding-bottom: 6px; }
  .document-name { flex-basis: 100%; }
  .document-actions { width: 100%; justify-content: flex-end; }
  .editor-instructions { font-size: 8px; }
  .document-stats { gap: 10px; font-size: 8px; }
  .selection-menu { width: min(290px, calc(100vw - 16px)); }
  .workflow-guide { gap: 6px; }
  .workflow-step { gap: 5px; }
  .workflow-step small { display: none; }
  .workflow-connector { flex-basis: 12px; }
  .step-number { width: 21px; height: 21px; }
  .selection-symbol { width: 25px; height: 25px; }
  .live-preview { gap: 5px; font-size: 7px; }
  .text-stats { gap: 7px; font-size: 8px; }
  .tool-shelf .section-heading h2 { font-size: 20px; }
  .overview-item { min-height: 100px; padding: 12px 10px; }
  .overview-item strong { font-size: 9px; }
  .site-footer { gap: 8px; font-size: 8px; }
  .site-footer > span { max-width: 100px; text-align: center; line-height: 1.4; }
  .footer-actions { gap: 7px; }
  .github-button { min-height: 27px; padding: 0 6px; gap: 4px; font-size: 8px; }
  .github-button svg { width: 12px; height: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* Find & Replace Bar */
.find-replace-bar {
  padding: 8px 12px;
  background: var(--surface-soft);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 6px;
  animation: slideDown .15s ease-out;
}
.find-replace-bar[hidden] { display: none; }
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.find-row, .replace-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.find-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  max-width: 320px;
}
.find-input-wrap input, .replace-row input {
  width: 100%;
  padding: 5px 60px 5px 26px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
  color: var(--ink);
  font-size: 11px;
  outline: none;
}
.replace-row input {
  padding: 5px 8px;
  max-width: 320px;
}
.find-input-wrap input:focus, .replace-row input:focus {
  border-color: var(--green);
}
.find-icon {
  position: absolute;
  left: 8px;
  color: var(--muted);
  font-size: 10px;
  pointer-events: none;
}
.find-count {
  position: absolute;
  right: 8px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 600;
  pointer-events: none;
}
.find-nav, .find-options {
  display: flex;
  align-items: center;
  gap: 3px;
}
.find-nav button, .find-opt-btn, .find-action-btn, .find-close {
  padding: 4px 7px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--ink);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: background .12s, border-color .12s;
}
.find-nav button:hover, .find-opt-btn:hover, .find-action-btn:hover, .find-close:hover {
  background: var(--green-pale);
  border-color: var(--green);
  color: var(--green-dark);
}
.find-opt-btn[aria-pressed="true"] {
  background: var(--green-pale);
  border-color: var(--green);
  color: var(--green-dark);
}
.find-close {
  margin-left: auto;
  border: 0;
  background: transparent;
  font-size: 15px;
  color: var(--muted);
  padding: 2px 6px;
}

/* Markdown Preview */
.document-preview {
  display: block;
  width: 100%;
  height: min(76vh, 760px);
  min-height: 620px;
  overflow-y: auto;
  padding: 30px clamp(24px, 8vw, 105px);
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 8px 8px;
  background-color: var(--surface);
  color: var(--ink);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.8;
}
.document-preview[hidden] { display: none; }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  margin-top: 1.4em;
  margin-bottom: 0.6em;
  color: var(--ink);
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.3;
}
.markdown-body h1 { font-size: 22px; border-bottom: 1px solid var(--line-soft); padding-bottom: 6px; }
.markdown-body h2 { font-size: 18px; border-bottom: 1px solid var(--line-soft); padding-bottom: 4px; }
.markdown-body h3 { font-size: 15px; }
.markdown-body p { margin: 0.8em 0; }
.markdown-body ul, .markdown-body ol { padding-left: 24px; margin: 0.8em 0; }
.markdown-body li { margin: 0.3em 0; }
.markdown-body blockquote {
  margin: 1em 0;
  padding: 6px 14px;
  border-left: 4px solid var(--green);
  background: var(--surface-soft);
  color: var(--muted);
  border-radius: 0 6px 6px 0;
}
.markdown-body code {
  padding: 2px 5px;
  border-radius: 4px;
  background: var(--surface-soft);
  border: 1px solid var(--line-soft);
  color: var(--green-dark);
  font-family: Consolas, monospace;
  font-size: 12px;
}
.markdown-body pre {
  margin: 1em 0;
  padding: 14px;
  border-radius: 8px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  overflow-x: auto;
}
.markdown-body pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 12px;
}
.markdown-body a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.markdown-body hr {
  margin: 2em 0;
  border: 0;
  height: 1px;
  background: var(--line);
}
.markdown-body del {
  color: var(--muted);
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(5, 14, 10, .72);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fadeIn .15s ease-out;
}
.modal-backdrop[hidden] { display: none; }
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal-card {
  width: min(100%, 540px);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .3);
  overflow: hidden;
  animation: popIn .18s cubic-bezier(.16, 1, .3, 1);
}
@keyframes popIn {
  from { opacity: 0; transform: scale(.95); }
  to { opacity: 1; transform: scale(1); }
}
.diff-card { width: min(100%, 720px); }
.modal-header {
  min-height: 48px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
}
.modal-title {
  margin: 0;
  font-family: var(--display);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}
.modal-close {
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 18px;
  cursor: pointer;
}
.modal-close:hover {
  background: var(--green-pale);
  color: var(--green-dark);
}
.modal-footer {
  min-height: 48px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  background: var(--surface-soft);
}
.modal-btn {
  padding: 6px 14px;
  border: 0;
  border-radius: 6px;
  background: var(--green);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  margin-left: auto;
}
.modal-btn:hover { background: var(--green-dark); }

/* Diff View */
.diff-summary {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line-soft);
  background: var(--surface-soft);
  font-size: 11px;
  color: var(--muted);
  display: flex;
  gap: 16px;
}
.diff-summary strong { color: var(--ink); }
.diff-body {
  padding: 16px;
  overflow-y: auto;
  max-height: 52vh;
  font-family: var(--font);
  font-size: 13px;
  line-height: 1.9;
  white-space: pre-wrap;
  word-break: break-word;
}
.diff-body ins {
  background: rgba(29, 127, 92, .22);
  color: var(--green-dark);
  text-decoration: none;
  padding: 1px 3px;
  border-radius: 3px;
  border-bottom: 1px solid var(--green);
}
.diff-body del {
  background: rgba(229, 72, 77, .18);
  color: #d13a3f;
  padding: 1px 3px;
  border-radius: 3px;
}
.diff-legend {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 10px;
}
.legend-add {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.legend-add::before {
  content: '';
  width: 10px;
  height: 10px;
  background: rgba(29, 127, 92, .38);
  border-radius: 2px;
}
.legend-del {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.legend-del::before {
  content: '';
  width: 10px;
  height: 10px;
  background: rgba(229, 72, 77, .3);
  border-radius: 2px;
}

/* Export Options */
.export-options-grid {
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.export-option-item {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: background .14s, border-color .14s, transform .14s;
}
.export-option-item:hover {
  background: var(--green-pale);
  border-color: var(--green);
  transform: translateY(-2px);
}
.export-icon { font-size: 20px; margin-bottom: 2px; }
.export-option-item strong { font-size: 12px; }
.export-option-item small { color: var(--muted); font-size: 9px; }

/* Analytics */
.analytics-grid {
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  max-height: 60vh;
  overflow-y: auto;
}
.stat-tile {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat-tile.wide-tile { grid-column: span 2; }
.stat-num {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 800;
  color: var(--green-dark);
}
.stat-label {
  color: var(--muted);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: .05em;
  font-weight: 600;
}
.stat-sub {
  color: var(--ink);
  font-size: 11px;
  font-weight: 500;
  margin-top: 2px;
}
.word-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}
.word-chip {
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--ink);
  font-size: 10px;
}
.word-chip span {
  color: var(--muted);
  font-size: 9px;
  margin-left: 3px;
}

/* Print Stylesheet */
@media print {
  .site-header, .site-footer, .tools-section, .workflow-guide, .tool-navigation, .tool-picker,
  .selection-context, .encode-controls, .transfer-rail, .options, .document-heading,
  .document-toolbar, .find-replace-bar, .editor-instructions, .document-footer,
  .modal-backdrop, .mode-switch, .result-panel, .panel-heading, .panel-footer {
    display: none !important;
  }
  body, .workbench, .page-shell, .document-mode-view, .document-editor {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    border: none !important;
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
    height: auto !important;
  }
  .document-editor, .document-preview {
    min-height: 0 !important;
    height: auto !important;
    font-size: 12pt !important;
    line-height: 1.6 !important;
    overflow: visible !important;
  }
}