/* SPDX-License-Identifier: GPL-3.0-or-later */
:root {
  color-scheme: light;
  --ink: #28261c;
  --muted: #797663;
  --line: #e8e2bf;
  --surface: #ffffff;
  --canvas: #fffdf2;
  --accent: #ffe21c;
  --accent-strong: #c7a900;
  --accent-wash: #fff8c9;
  --accent-ink: #3d3500;
  --coral: #df7855;
  --blue: #4c7587;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-size: 14px;
}

button, input, select { font: inherit; }
button { color: inherit; }
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }
[hidden] { display: none !important; }

.topbar {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(24px, calc((100vw - 1440px) / 2));
  color: var(--ink);
  background: #fff9d9;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: inherit;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 28px;
  height: 28px;
  display: block;
  flex: 0 0 auto;
  object-fit: contain;
  border-radius: 7px;
}

.brand-divider { margin: 0 4px; color: #aaa27a; font-weight: 400; }
.local-badge { display: flex; align-items: center; gap: 8px; color: #77704e; font-size: 12px; }
.status-dot, .result-indicator { width: 7px; height: 7px; display: inline-block; border-radius: 50%; background: var(--accent-strong); }

.tabs {
  height: 52px;
  display: flex;
  align-items: stretch;
  gap: 28px;
  padding: 0 max(24px, calc((100vw - 1440px) / 2));
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.tab {
  position: relative;
  padding: 0 2px;
  color: var(--muted);
  background: transparent;
  border: 0;
  cursor: pointer;
}

.tab::after { position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; content: ""; background: transparent; }
.tab.is-active { color: var(--ink); font-weight: 700; }
.tab.is-active::after { background: var(--accent-strong); }

.page-shell { width: min(1440px, 100%); min-height: calc(100vh - 160px); margin: 0 auto; padding: 32px 24px 56px; }
.view { display: none; }
.view.is-visible { display: block; animation: view-in 180ms ease-out; }
@keyframes view-in { from { opacity: .45; transform: translateY(3px); } to { opacity: 1; transform: translateY(0); } }

.workspace-heading { min-height: 66px; display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.eyebrow { margin: 0 0 6px; color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: 1.1px; }
h1 { margin: 0; font-size: 23px; line-height: 1.25; font-weight: 650; }
.file-meta { max-width: 55%; padding-bottom: 4px; overflow: hidden; color: var(--muted); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }

.workbench, .decode-layout { min-height: 580px; display: grid; grid-template-columns: 310px minmax(0, 1fr); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; box-shadow: 0 8px 30px #493d0908; }
.controls { max-height: calc(100vh - 250px); min-height: 0; overflow: auto; overscroll-behavior: contain; display: flex; flex-direction: column; gap: 0; padding: 18px 20px; border-right: 1px solid var(--line); }
.control-section { padding: 0 0 20px; margin: 0 0 18px; border-bottom: 1px solid var(--line); }
.section-heading { display: flex; align-items: center; gap: 9px; margin-bottom: 13px; }
.section-heading h2 { margin: 0; font-size: 13px; font-weight: 650; }
.step-index { color: #a28c10; font-size: 10px; font-weight: 750; font-variant-numeric: tabular-nums; }
.upload-zone {
  width: 100%;
  min-height: 66px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  text-align: left;
  background: #fffdf4;
  border: 1px dashed #d8cf9e;
  border-radius: 4px;
  cursor: pointer;
}
.upload-zone:hover, .upload-zone.is-dragging { background: var(--accent-wash); border-color: var(--accent-strong); }
.upload-plus { width: 30px; height: 30px; display: grid; flex: 0 0 auto; place-items: center; color: var(--accent-ink); background: #fff1a1; border-radius: 4px; font-size: 21px; font-weight: 350; }
.upload-copy { min-width: 0; display: grid; gap: 3px; }
.upload-copy strong { overflow: hidden; font-size: 12px; font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.upload-copy small { color: var(--muted); font-size: 11px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; clip-path: inset(50%); }

.preset-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; }
.preset-card { position: relative; min-width: 0; }
.preset-card .preset-option { width: 100%; height: 100%; border-radius: 7px; transition: border-color 140ms ease, box-shadow 140ms ease; }
.preset-option:hover { border-color: #c6ae24; box-shadow: 0 2px 8px #493d0910; }
.preset-remove { position: absolute; top: -6px; right: -5px; width: 24px; height: 24px; display: grid; place-items: center; padding: 0; color: #657063; background: #fff; border: 1px solid #d8dfd5; border-radius: 50%; box-shadow: 0 2px 5px #10211014; cursor: pointer; font-size: 18px; line-height: 1; }
.preset-remove:hover { color: #a3432e; border-color: #d99c8b; background: #fff7f2; }
.selection-label { max-width: 110px; margin-left: auto; padding: 3px 7px; overflow: hidden; color: #665700; background: #fff6bf; border-radius: 4px; font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.workspace-intro { margin: 8px 0 0; color: #77745f; font-size: 12px; line-height: 1.65; }
.workflow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 0 0 20px; padding: 0; list-style: none; }
.workflow li { display: flex; align-items: center; gap: 9px; padding: 11px 14px; color: #8a8774; background: #f5f2e4; border: 1px solid transparent; border-radius: 6px; font-size: 12px; }
.workflow li > span { width: 23px; height: 23px; display: grid; flex-shrink: 0; place-items: center; background: #fff9; border-radius: 50%; font-size: 11px; font-weight: 700; }
.workflow li[aria-current] { color: #4c4100; background: #fff8c9; border-color: #eadb70; font-weight: 650; }
.workflow li[aria-current] > span { background: #ffe98a; }
.workflow li.is-complete { color: #766b2c; background: #faf6de; }
.generate-actions { margin: -2px 0 20px; }
.generate-actions .primary-button { width: 100%; min-height: 44px; border-radius: 6px; }
.generate-actions .field-hint { text-align: center; }
.sizing-summary { padding: 8px 9px; background: #fff9dd; border-radius: 4px; font-variant-numeric: tabular-nums; }
.preview-help { margin: 7px 0 0; color: #817d67; font-size: 10px; line-height: 1.5; }
.download-action { min-width: 104px; }
.preset-option { min-width: 0; padding: 4px; background: white; border: 1px solid var(--line); border-radius: 4px; cursor: pointer; }
.preset-option img { width: 100%; aspect-ratio: 1; display: block; object-fit: cover; border-radius: 2px; }
.preset-option span { display: block; padding-top: 5px; overflow: hidden; color: #59645b; font-size: 10px; text-align: center; text-overflow: ellipsis; white-space: nowrap; }
.preset-option.is-active { border-color: var(--accent-strong); box-shadow: inset 0 0 0 1px var(--accent-strong); }
.preset-option.is-active span { color: var(--accent-ink); font-weight: 700; }

.field-label { display: block; margin-bottom: 9px; font-size: 12px; font-weight: 650; }
.field-label > span { margin-left: 4px; color: var(--muted); font-weight: 400; }
.text-input { width: 100%; height: 38px; padding: 0 10px; color: var(--ink); background: white; border: 1px solid #d8d1ad; border-radius: 4px; }
.text-input::placeholder { color: #9ba49c; }
.field-hint { margin: 7px 0 0; color: var(--muted); font-size: 11px; line-height: 1.55; }
.spaced-label { margin-top: 13px; }
.output-size-line { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin: 14px 0 0; padding: 10px 11px; background: #fff8d5; border-radius: 4px; font-size: 11px; }
.output-size-line strong { color: #786500; font-size: 14px; font-variant-numeric: tabular-nums; }
.advanced-settings { min-width: 0; margin: 0 0 18px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.advanced-settings summary { color: #655e3b; cursor: pointer; font-size: 12px; font-weight: 650; }
.advanced-settings summary > span { float: right; color: var(--muted); font-size: 10px; font-weight: 400; }
.advanced-content { padding-top: 10px; }
.checkbox-label { display: flex; align-items: center; gap: 6px; margin: 12px 0; color: #655e3b; font-size: 12px; }
.checkbox-label input { accent-color: var(--accent-strong); }
.advanced-settings fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
.advanced-settings fieldset:disabled { opacity: .5; }
.advanced-stats { margin-top: 12px; padding: 8px 10px; color: var(--muted); background: #fbf9ef; border-radius: 4px; font-size: 10px; line-height: 1.6; overflow-wrap: anywhere; }
.advanced-stats p { margin: 5px 0; }
.strength-section { padding-bottom: 18px; }
.field-line { display: flex; align-items: center; justify-content: space-between; }
.field-line .field-label { margin-bottom: 5px; }
.field-line output { color: #786500; font-size: 12px; font-weight: 700; font-variant-numeric: tabular-nums; }
input[type="range"] { width: 100%; height: 18px; margin: 4px 0 0; accent-color: var(--accent-strong); cursor: pointer; }
.range-labels { display: flex; justify-content: space-between; color: var(--muted); font-size: 10px; }
.preference-labels { align-items: flex-start; gap: 10px; }
.preference-labels span { max-width: 49%; overflow-wrap: anywhere; }
.preference-labels span:last-child { text-align: right; }
.advanced-explainer { margin-bottom: 9px; }

.primary-button, .quiet-button { min-height: 38px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 13px; border: 1px solid transparent; border-radius: 4px; font-size: 12px; font-weight: 650; cursor: pointer; transition: background 120ms ease, border-color 120ms ease; }
.primary-button { color: var(--accent-ink); background: var(--accent); border-color: #ead22a; }
.primary-button:hover:not(:disabled) { background: #f5d300; }
.primary-button:disabled, .quiet-button:disabled { color: #9aa39b; background: #e8ece8; border-color: #e8ece8; cursor: not-allowed; }
.quiet-button { color: #514800; background: white; border-color: var(--line); }
.quiet-button:hover:not(:disabled) { background: #fff9df; border-color: #cab93f; }
.quiet-button.is-dragging { color: #514800; background: var(--accent-wash); border-color: var(--accent-strong); }
.controls > .primary-button { width: 100%; min-height: 42px; margin-top: auto; }
.privacy-note { margin: 12px 0 0; color: var(--muted); font-size: 10px; line-height: 1.65; }
.button-spinner { width: 13px; height: 13px; border: 2px solid #ffffff70; border-top-color: #fff; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.preview-area { min-width: 0; min-height: 0; display: flex; flex-direction: column; padding: 16px; }
.preview-toolbar { min-height: 38px; display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 10px; }
.preview-tools { display: flex; align-items: center; gap: 12px; }
.zoom-controls { display: flex; align-items: center; gap: 3px; padding: 3px; background: #faf8ed; border: 1px solid var(--line); border-radius: 4px; }
.zoom-button { min-width: 29px; height: 27px; padding: 0 6px; color: #5f592f; background: transparent; border: 0; border-radius: 2px; cursor: pointer; }
.zoom-button:hover { color: var(--accent-ink); background: #fff0a0; }
.zoom-fit { min-width: 44px; font-size: 10px; }
.zoom-one { font-size: 10px; }
#zoom-value { min-width: 40px; color: #77704e; font-size: 10px; text-align: center; font-variant-numeric: tabular-nums; }
.segmented { display: inline-flex; align-items: center; padding: 3px; background: #f8f6eb; border-radius: 4px; }
.preview-choice { min-height: 27px; padding: 0 10px; color: var(--muted); background: transparent; border: 0; border-radius: 3px; font-size: 11px; cursor: pointer; }
.preview-choice.is-active { color: var(--accent-ink); background: white; box-shadow: 0 1px 2px #493d0918; font-weight: 650; }
.preview-grid { min-height: 0; flex: 1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-rows: repeat(2, minmax(0, 1fr)); gap: 8px; }
.preview-grid[data-mode="mosaic"] [data-panel="source"], .preview-grid[data-mode="mosaic"] [data-panel="restored"], .preview-grid[data-mode="mosaic"] [data-panel="target"] { display: none; }
.preview-grid[data-mode="mosaic"] { grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr); }
.preview-grid[data-mode="restored"] [data-panel="source"], .preview-grid[data-mode="restored"] [data-panel="mosaic"], .preview-grid[data-mode="restored"] [data-panel="target"] { display: none; }
.preview-grid[data-mode="restored"] { grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr); }
.preview-panel { min-width: 0; min-height: 0; display: grid; grid-template-rows: minmax(28px, auto) minmax(0, 1fr); margin: 0; }
.preview-panel figcaption { min-height: 28px; display: flex; justify-content: space-between; align-items: center; gap: 8px; color: #4f5a52; font-size: 11px; }
.preview-panel figcaption span:last-child { color: #89938b; font-size: 10px; font-variant-numeric: tabular-nums; }
.canvas-wrap { position: relative; min-height: 0; flex: 1; height: clamp(180px, 29vh, 360px); overflow: hidden; background-color: #f0eedf; background-image: linear-gradient(45deg, #e8e5d2 25%, transparent 25%), linear-gradient(-45deg, #e8e5d2 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #e8e5d2 75%), linear-gradient(-45deg, transparent 75%, #e8e5d2 75%); background-position: 0 0, 0 6px, 6px -6px, -6px 0; background-size: 12px 12px; border: 1px solid #e1ddc8; border-radius: 3px; }
.canvas-viewport { position: absolute; inset: 0; overflow: hidden; overscroll-behavior: contain; cursor: grab; touch-action: pan-y; user-select: none; }
.canvas-viewport.is-panning { cursor: grabbing; }
.canvas-stage { min-width: 100%; min-height: 100%; width: 100%; height: 100%; display: grid; place-items: center; }
.canvas-wrap canvas { display: block; flex: 0 0 auto; max-width: none; max-height: none; }
.canvas-wrap .preview-animation { display: block; flex: 0 0 auto; max-width: none; max-height: none; object-fit: fill; }
.empty-state { position: absolute; inset: 0; max-width: 270px; height: max-content; margin: auto; display: grid; gap: 7px; padding: 13px 16px; color: #7d7962; background: #fffef3f2; border: 1px solid #e5dfc3; border-radius: 5px; font-size: 11px; line-height: 1.6; text-align: center; pointer-events: none; }
.empty-state strong { color: #655d33; font-size: 12px; font-weight: 600; }
.result-strip { min-height: 32px; display: flex; align-items: center; gap: 8px; margin-top: 8px; padding: 0 10px; color: var(--muted); background: #faf9f0; border-left: 2px solid #d3ceb6; font-size: 11px; }
.result-indicator { flex: 0 0 auto; background: #aaa58d; }
.result-strip.is-ready { color: #655700; background: #fff9d9; border-left-color: var(--accent-strong); }
.result-strip.is-ready .result-indicator { background: var(--accent-strong); }
.result-strip[data-status="checking"] { color: #6d6747; background: #faf8ea; border-left-color: #c8b94e; }
.result-strip[data-status="checking"] .result-indicator { background: #bba92e; animation: pulse 1.2s ease-in-out infinite; }
.result-strip[data-status="warning"], .result-strip[data-status="error"] { color: #916335; background: #fff6e8; border-left-color: #d4a15b; }
.result-strip[data-status="warning"] .result-indicator, .result-strip[data-status="error"] .result-indicator { background: #d4a15b; }
@keyframes pulse { 50% { opacity: .35; } }

.decode-layout { min-height: 510px; }
.decode-controls { min-height: 510px; }
.wide-button { width: 100%; margin-top: 10px; }
.decode-preview { min-width: 0; padding: 20px; }
.decode-preview-toolbar { display: flex; justify-content: flex-end; margin-bottom: 8px; }
.decode-preview .preview-panel { width: 100%; }
.decode-canvas-wrap { height: min(62vh, 620px); }
.decode-message { min-height: 40px; display: flex; align-items: center; margin-top: 10px; padding: 9px 11px; color: #775f2c; background: #fff9e7; border-left: 2px solid #d7b635; font-size: 11px; line-height: 1.5; }
.decode-message.is-success { color: #655700; background: #fff9d9; border-left-color: var(--accent-strong); }

.site-footer { min-height: 44px; display: flex; align-items: center; justify-content: center; gap: 22px; padding: 8px 24px; color: #827e68; border-top: 1px solid var(--line); font-size: 11px; }
.site-footer a, .policy-copy a { color: #655b2d; text-decoration-color: #c5b86f; text-underline-offset: 3px; }
.site-footer a:hover, .policy-copy a:hover { color: var(--accent-ink); }
.toast { position: fixed; z-index: 10; right: 22px; bottom: 20px; max-width: min(420px, calc(100vw - 32px)); padding: 12px 15px; color: var(--accent-ink); background: #fff9d9; border: 1px solid #e8d762; border-left: 3px solid var(--accent-strong); border-radius: 4px; box-shadow: 0 8px 24px #493d0920; visibility: hidden; opacity: 0; pointer-events: none; transform: translateY(7px); transition: opacity 160ms ease, transform 160ms ease; }
.toast.is-visible { display: flex; align-items: center; gap: 18px; visibility: visible; opacity: 1; transform: translateY(0); pointer-events: auto; }
.toast-action { padding: 4px 2px; color: #6b5b00; background: transparent; border: 0; cursor: pointer; white-space: nowrap; font-weight: 650; }
.toast.is-error { border-left-color: var(--coral); }

.batch-list { display: grid; gap: 6px; max-height: 232px; margin-top: 10px; overflow: auto; overscroll-behavior: contain; scrollbar-width: thin; }
.batch-list:empty { display: none; }
.batch-item { min-width: 0; display: flex; align-items: center; background: #fffdf5; border: 1px solid var(--line); border-radius: 6px; }
.batch-item.is-active { border-color: var(--accent-strong); background: #fff9d9; box-shadow: inset 2px 0 var(--accent-strong); }
.batch-select { min-width: 0; min-height: 64px; flex: 1; display: flex; align-items: center; gap: 7px; padding: 7px; text-align: left; border: 0; background: transparent; cursor: pointer; }
.batch-select img { width: 36px; height: 40px; flex: 0 0 auto; object-fit: cover; border-radius: 3px; }
.batch-copy { min-width: 0; flex: 1; display: grid; gap: 5px; }
.batch-copy strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; font-weight: 600; }
.batch-copy small { display: -webkit-box; overflow: hidden; -webkit-line-clamp: 2; -webkit-box-orient: vertical; color: var(--muted); font-size: 10px; line-height: 1.4; overflow-wrap: anywhere; }
.batch-item-actions { flex: 0 0 auto; display: grid; padding: 2px; }
.batch-remove, .batch-download { width: 28px; height: 28px; display: grid; place-items: center; padding: 0; border: 0; border-radius: 4px; background: transparent; cursor: pointer; font-size: 19px; }
.batch-download svg { width: 17px; height: 17px; display: block; }
.batch-remove:hover { color: #a3432e; background: #fff0e8; }
.batch-download:hover:not(:disabled) { background: #fff0a0; }
.batch-download:disabled { color: #c5c1ad; cursor: default; }
.progress-ring { --progress: 0deg; position: relative; isolation: isolate; width: 32px; height: 32px; flex: 0 0 auto; display: grid; place-items: center; padding: 0; color: #7a690f; background: conic-gradient(var(--accent-strong) var(--progress), #e8e3cc 0); border: 0; border-radius: 50%; cursor: pointer; font-size: 8px; font-variant-numeric: tabular-nums; transition: box-shadow 140ms ease, transform 140ms ease; }
.progress-ring::before { position: absolute; z-index: -1; inset: 3px; border-radius: 50%; background: #fffdf5; content: ''; }
.progress-ring:hover:not(:disabled) { box-shadow: 0 0 0 4px #c7a90024; transform: scale(1.08); }
.progress-ring:disabled { cursor: default; }
.batch-item[data-status="done"] .progress-ring { color: #52703c; background: #8faa65; font-size: 15px; }
.batch-item[data-status="error"] .progress-ring, .batch-item[data-status="warning"] .progress-ring { color: #a3432e; background: #d79a65; font-size: 14px; }
.batch-unify { align-items: flex-start; line-height: 1.6; margin-bottom: 0; }
.batch-unify input { flex: 0 0 auto; margin-top: 3px; }
.batch-summary { overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
#encode-view .controls .batch-summary, #encode-view .controls .batch-settings-hint { display: block; }
.batch-summary:empty { display: none !important; }
.batch-list:empty ~ .batch-settings-hint, .batch-list:empty ~ .batch-unify { display: none !important; }

@media (min-width: 1180px) {
  .page-shell { padding-top: 20px; padding-bottom: 24px; }
  .workspace-heading { margin-bottom: 14px; }
  .workflow { margin-bottom: 12px; }
  .workbench { height: max(540px, calc(100vh - 355px)); min-height: 540px; }
  .preview-grid[data-mode="compare"]:not(.has-target) { grid-template-columns: repeat(3, minmax(0, 1fr)); grid-template-rows: minmax(0, 1fr); }
  .preview-grid:not(.has-target) .canvas-wrap, .canvas-wrap { height: auto; }
  .preview-grid .preview-panel .canvas-wrap { height: calc(100% - 28px); }
  .preview-grid[data-mode="compare"] [data-panel="restored"] { display: grid; }
}

@media (max-width: 900px) {
  .page-shell { padding: 24px 16px 40px; }
  .workbench, .decode-layout { grid-template-columns: 245px minmax(0, 1fr); }
  .controls { padding: 18px 15px; }
  .preview-area, .decode-preview { padding: 15px; }
  .controls { max-height: calc(100vh - 220px); }
  .preview-grid { grid-template-rows: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 901px) and (max-width: 1179px) {
  .page-shell { padding-top: 12px; padding-bottom: 16px; }
  .workspace-heading { margin-bottom: 14px; }
  .workflow { margin-bottom: 12px; }
  .workbench { height: max(420px, calc(100vh - 355px)); min-height: 420px; }
  .preview-grid[data-mode="compare"] { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-rows: minmax(0, 1fr); }
  .preview-grid[data-mode="compare"] [data-panel="restored"], .preview-grid[data-mode="compare"] [data-panel="target"] { display: none; }
  .canvas-wrap { height: min(32vh, 230px); }
}

@media (min-width: 641px) and (max-width: 900px) {
  .page-shell { padding: 16px 16px 20px; }
  .workspace-heading { margin-bottom: 10px; }
  .workflow { margin-bottom: 10px; }
  .workbench { height: max(420px, calc(100vh - 360px)); min-height: 420px; }
  .preview-grid[data-mode="compare"] { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-rows: minmax(0, 1fr); }
  .preview-grid[data-mode="compare"] [data-panel="restored"], .preview-grid[data-mode="compare"] [data-panel="target"] { display: none; }
  .canvas-wrap { height: min(34vh, 260px); }
}

@media (max-width: 640px) {
  .topbar { height: 56px; padding: 0 15px; }
  .brand { gap: 8px; font-size: 11px; }
  .brand-mark { width: 25px; height: 25px; }
  .local-badge { gap: 6px; font-size: 10px; }
  .tabs { position: sticky; top: 0; z-index: 5; height: 46px; gap: 20px; padding: 0 15px; font-size: 12px; }
  .page-shell { min-height: calc(100vh - 146px); padding: 8px 12px; }
  .workspace-heading { min-height: 0; align-items: flex-end; margin-bottom: 8px; }
  #encode-view .workspace-heading, #decode-view .workspace-heading { align-items: flex-start; flex-direction: column; gap: 10px; }
  #encode-view .file-meta, #decode-view .file-meta { max-width: 100%; }
  .workspace-intro { max-width: 340px; font-size: 11px; }
  #encode-view .workspace-intro, body:not(.has-source) #encode-view .file-meta { display: none; }
  .workflow { gap: 5px; margin-bottom: 12px; }
  .workflow li { flex-direction: column; gap: 5px; padding: 8px 2px; font-size: 10px; }
  .workflow li > span { width: 21px; height: 21px; font-size: 10px; }
  .preset-remove { width: 28px; height: 28px; right: -4px; font-size: 20px; }
  h1 { font-size: 20px; }
  .file-meta { max-width: 48%; font-size: 10px; }
  .workbench, .decode-layout { display: flex; flex-direction: column; overflow: visible; }
  .controls, .decode-controls { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .controls { width: 100%; min-width: 0; max-height: none; display: flex; overflow: visible; padding: 8px; }
  .controls .control-section { margin-bottom: 6px; padding-bottom: 8px; }
  .controls > .primary-button { margin-top: 0; }
  .controls > .privacy-note { margin-top: 9px; }
  .decode-controls { display: flex; }
  .decode-controls .control-section { width: 100%; }
  .preset-list { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 4px; }
  .preview-area, .decode-preview { padding: 12px; }
  .preview-toolbar { position: sticky; top: 46px; z-index: 2; align-items: center; padding: 8px 0; margin: -8px 0 6px; background: white; }
  .preview-toolbar { flex-wrap: wrap; }
  .preview-tools { gap: 5px; }
  .zoom-controls { gap: 0; padding: 2px; }
  .zoom-button { min-width: 26px; height: 26px; padding: 0 4px; }
  .zoom-fit, .zoom-one { min-width: 34px; }
  #zoom-value { min-width: 30px; font-size: 9px; }
  .preview-choice { padding: 0 7px; font-size: 10px; }
  .preview-tools { width: 100%; justify-content: space-between; }
  .quiet-button { min-height: 32px; padding: 0 9px; font-size: 10px; }
  .canvas-wrap { min-height: 230px; height: min(78vw, 420px); }
  .preview-panel .canvas-wrap { flex: none; }
  .preview-grid { display: block; }
  .preview-grid[data-mode="compare"] [data-panel="restored"], .preview-grid[data-mode="compare"] [data-panel="target"] { display: none; }
  .preview-grid[data-mode="compare"] [data-panel="source"], .preview-grid[data-mode="compare"] [data-panel="mosaic"] { margin-bottom: 8px; }
  .preview-grid[data-mode="compare"] [data-panel="source"] .canvas-wrap { height: min(45vw, 260px); min-height: 190px; }
  .preview-grid[data-mode="compare"] [data-panel="mosaic"] .canvas-wrap { height: min(78vw, 420px); }
  .preview-grid { gap: 8px; }
  #encode-view .controls .field-hint, #encode-view .controls .privacy-note { display: none; }
  #encode-view .advanced-content .field-hint { display: block; }
  #encode-view .output-size-line { display: none; }
  body.has-preview #encode-view .output-size-line { display: flex; }
  #encode-view .basic-settings > .spaced-label { margin-top: 7px; }
  #encode-view .generate-actions { margin-bottom: 8px; }
  #encode-view #custom-preset-picker { margin-top: 4px; }
  #encode-view .upload-zone { min-height: 56px; }
  #encode-view .preset-option img { aspect-ratio: 1.8; object-fit: contain; }
  #encode-view .preset-option span { font-size: 9px; }
  .site-footer { min-height: 40px; flex-wrap: wrap; gap: 8px 16px; padding: 9px 12px; font-size: 10px; }
  .toast { right: 12px; bottom: 12px; }
  .local-badge { display: none; }
}

@media (min-width: 641px) {
  html { min-height: 100%; overflow-x: hidden; overflow-y: auto; }
  body { min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; overflow: visible; }
  .topbar, .tabs, .site-footer { min-height: 0; }
  .page-shell { flex: 1 0 auto; height: auto; min-height: calc(100dvh - 160px); display: flex; padding: 16px 24px; overflow: visible; }
  .view.is-visible { min-width: 0; width: 100%; min-height: 0; display: flex; flex: 1 0 auto; flex-direction: column; }
  .workspace-heading { flex: 0 0 auto; margin-bottom: 12px; }
  .workflow { flex: 0 0 auto; margin-bottom: 12px; }
  .workbench, .decode-layout { height: auto; min-height: 0; flex: 0 0 auto; }
  .controls { max-height: none; overflow: visible; }
  .preview-area, .decode-preview { min-height: 0; }
  .preview-grid .preview-panel .canvas-wrap { height: auto; }
  .decode-layout { min-height: 0; }
  .decode-controls { min-height: 0; }
  .decode-preview { display: flex; flex-direction: column; padding: 16px; }
  .decode-preview-toolbar { flex: 0 0 auto; }
  .decode-preview .preview-panel { min-height: 0; flex: 1 1 auto; }
  .decode-canvas-wrap { height: auto; min-height: 0; flex: 1 1 auto; }
}

@media (min-width: 641px) and (max-width: 900px) {
  .preview-toolbar { flex-wrap: wrap; }
  .preview-tools { width: 100%; justify-content: space-between; }
}

@media (min-width: 641px) {
  #source-picker, #encoded-picker { margin-top: -3px; }
  body:not(.has-preview) #encode-view { justify-content: flex-start; }
  body:not(.has-preview) .page-shell { padding-top: clamp(18px, 6vh, 64px); }
  #encode-view .workspace-heading { min-height: 0; margin-bottom: 12px; }
  #encode-view .workbench { min-height: 0; height: auto; flex: 0 0 auto; display: flex; overflow: visible; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; box-shadow: 0 5px 20px #493d0908; }
  #encode-view .controls { min-width: 0; width: 100%; height: auto; max-height: none; display: grid; grid-template-columns: minmax(230px, 1fr) minmax(190px, .85fr) minmax(330px, 1.7fr); grid-template-rows: auto auto; gap: 0 12px; align-content: start; overflow: visible; padding: 0; border: 0; }
  #encode-view .control-section { min-width: 0; margin: 0; padding: 10px 12px 12px; border: 0; }
  #encode-view .control-section:nth-child(2) { border-right: 1px solid var(--line); border-left: 1px solid var(--line); }
  #encode-view .section-heading { margin-bottom: 10px; }
  #encode-view .basic-settings { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); grid-template-rows: auto repeat(4, auto); column-gap: 14px; align-content: start; }
  #encode-view .basic-settings > .section-heading { grid-column: 1 / -1; }
  #encode-view .basic-settings > :nth-child(2) { grid-column: 1; grid-row: 2; }
  #encode-view .basic-settings > :nth-child(3) { grid-column: 1; grid-row: 3; }
  #encode-view .basic-settings > :nth-child(4) { grid-column: 1; grid-row: 4; }
  #encode-view .basic-settings > :nth-child(5) { grid-column: 1; grid-row: 5; }
  #encode-view .basic-settings > :nth-child(6) { grid-column: 1; grid-row: 6; }
  #encode-view .basic-settings > :nth-child(7) { grid-column: 2; grid-row: 2; }
  #encode-view .basic-settings > :nth-child(8) { grid-column: 2; grid-row: 3; }
  #encode-view .basic-settings > :nth-child(9) { grid-column: 2; grid-row: 4; }
  #encode-view .basic-settings > :nth-child(10) { grid-column: 2; grid-row: 6; }
  #encode-view .basic-settings > :nth-child(11) { grid-column: 3; grid-row: 2; }
  #encode-view .basic-settings > :nth-child(12) { grid-column: 3; grid-row: 3; }
  #encode-view .basic-settings > :nth-child(13) { grid-column: 3; grid-row: 4; }
  #encode-view .basic-settings > :nth-child(14) { grid-column: 3; grid-row: 6; }
  #encode-view .basic-settings > .field-line { align-items: baseline; margin-top: 4px; }
  #encode-view .basic-settings > .field-line .field-label { margin: 0; }
  #encode-view .basic-settings > input[type="range"] { margin: 2px 0 0; }
  #encode-view .basic-settings > .range-labels { font-size: 9px; }
  #encode-view .basic-settings > .preference-labels span { max-width: 50%; }
  #encode-view .basic-settings > .output-size-line { display: none; margin: 5px 0 0; padding: 5px 7px; font-size: 10px; }
  #encode-view .basic-settings > .output-size-line strong { font-size: 12px; }
  body.has-preview #encode-view .basic-settings > .output-size-line { display: flex; }
  #encode-view .control-section .field-hint, #encode-view .generate-actions .field-hint, #encode-view .privacy-note { display: none; }
  #encode-view .generate-actions { align-self: start; margin: 4px 12px 0; }
  #encode-view .generate-actions .primary-button { min-height: 40px; }
  #encode-view .basic-settings > .advanced-settings { grid-column: 1 / -1; grid-row: 7; align-self: start; margin: 10px 0 0; padding: 10px 0 0; border: 0; border-top: 1px solid var(--line); }
  #encode-view .advanced-settings summary > span { margin-left: 12px; }
  #encode-view .advanced-content { max-height: clamp(140px, 32dvh, 360px); overflow: auto; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-gutter: stable; }
  #encode-view .advanced-content .field-hint, #encode-view .advanced-content .privacy-note { display: block; }
  #encode-view .privacy-note { align-self: center; margin: 8px 12px 0; }
  #encode-view .preview-area { min-height: 0; margin-top: 14px; padding: 14px 0 20px; border-top: 1px solid var(--line); background: transparent; }
  #encode-view .preview-grid { height: clamp(300px, 48vh, 520px); flex: 0 0 auto; grid-template-columns: repeat(3, minmax(0, 1fr)); grid-template-rows: minmax(0, 1fr); gap: 12px; }
  #encode-view .preview-grid.has-target { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  #encode-view .preview-grid .preview-panel .canvas-wrap { height: auto; }
  #encode-view .preview-grid[data-mode="compare"] [data-panel="restored"] { display: grid; }
  body.has-preview { height: auto; min-height: 100vh; min-height: 100dvh; grid-template-rows: 64px 52px minmax(0, 1fr) 44px; overflow: visible; }
  html.has-preview { height: auto; overflow-x: hidden; overflow-y: auto; }
  body.has-preview .page-shell { height: auto; min-height: calc(100dvh - 160px); overflow: visible; }
  body.has-preview .view.is-visible { display: block; }
  body.has-preview #encode-view .controls { height: auto; }
}

@media (min-width: 901px) and (max-width: 1100px) {
  #encode-view .controls { grid-template-columns: minmax(220px, 1fr) minmax(180px, .8fr) minmax(300px, 1.5fr); gap: 0; }
}

@media (min-width: 641px) and (max-width: 900px) {
  #encode-view .controls { grid-template-columns: minmax(250px, 1fr) minmax(200px, 1fr); }
}

@media (max-width: 640px) {
  .batch-list { max-height: 204px; }
  .batch-select { min-height: 66px; padding: 7px 8px; gap: 9px; }
  .batch-select img { width: 40px; height: 44px; }
  .batch-remove, .batch-download { width: 34px; height: 32px; }
  .batch-copy strong { font-size: 12px; }
  .progress-ring { width: 34px; height: 34px; }
  .batch-unify { margin-top: 8px; font-size: 11px; }
  .batch-settings-hint { font-size: 10px; }
}

@media (min-width: 641px) and (max-width: 900px) {
  #encode-view .controls { grid-template-columns: minmax(180px, .9fr) minmax(240px, 1.1fr); }
  #encode-view .control-section:nth-child(2) { border-right: 0; }
  #encode-view .basic-settings { grid-column: 1 / -1; grid-row: 2; border-top: 1px solid var(--line); }
  #encode-view .generate-actions { grid-column: 1; grid-row: 3; }
  #encode-view .preview-grid, #encode-view .preview-grid.has-target { height: 540px; grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-rows: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 641px) and (max-width: 900px) and (max-height: 640px) {
  body:not(.has-preview) #encode-view .basic-settings { column-gap: 8px; }
  body:not(.has-preview) #encode-view .basic-settings > .range-labels { font-size: 8px; }
  body:not(.has-preview) #encode-view .control-section:nth-child(2) { padding-right: 8px; padding-left: 8px; }
  body:not(.has-preview) #encode-view .preset-list { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 3px; }
  body:not(.has-preview) #encode-view .preset-option { padding: 2px; }
  body:not(.has-preview) #encode-view .preset-option img { aspect-ratio: 1.5; }
}

@media (min-width: 641px) and (max-height: 640px) {
  body:not(.has-preview) { grid-template-rows: 52px 44px minmax(0, 1fr) 32px; }
  body:not(.has-preview) .page-shell { padding-top: 7px; }
  body:not(.has-preview) .page-shell { padding: 7px 18px; }
  body:not(.has-preview) #encode-view .workspace-heading { margin-bottom: 5px; }
  body:not(.has-preview) #encode-view .eyebrow, body:not(.has-preview) #encode-view .workspace-intro { display: none; }
  body:not(.has-preview) #encode-view h1 { font-size: 19px; }
  body:not(.has-preview) #encode-view .file-meta { padding-bottom: 0; }
  body:not(.has-preview) #encode-view .control-section { padding-top: 4px; padding-bottom: 5px; }
  body:not(.has-preview) #encode-view .section-heading { margin-bottom: 5px; }
  body:not(.has-preview) #encode-view .basic-settings > .section-heading { margin-bottom: 2px; }
  body:not(.has-preview) #encode-view .basic-settings > .field-line { margin-top: 0; }
  body:not(.has-preview) #encode-view .basic-settings > .range-labels { line-height: 1.2; }
  body:not(.has-preview) #encode-view .generate-actions, body:not(.has-preview) #encode-view .advanced-settings, body:not(.has-preview) #encode-view .privacy-note { margin-top: 3px; }
  body.has-preview { grid-template-rows: 52px 44px minmax(0, 1fr) 32px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

#encode-view .controls .batch-settings-hint, #encode-view .generate-actions .batch-summary { display: block; }
#encode-view .controls .batch-list:empty ~ .batch-settings-hint { display: none; }

.topbar-actions { display: flex; align-items: center; gap: 22px; }
.tutorial-button { display: inline-flex; align-items: center; gap: 7px; min-height: 34px; padding: 0 10px; color: #655b2d; background: #fffdf380; border: 1px solid #e6dcac; border-radius: 7px; cursor: pointer; font-size: 12px; }
.tutorial-button > span { display: grid; place-items: center; width: 16px; height: 16px; border: 1px solid currentColor; border-radius: 50%; font-size: 11px; font-weight: 700; }
.tutorial-button:hover, .tutorial-button[aria-expanded="true"] { color: var(--accent-ink); background: #fff0a0; border-color: #d4bd42; }
.tutorial { position: fixed; inset: 0; z-index: 100; pointer-events: none; }
.tutorial-shade { position: absolute; inset: 0; }
.tutorial-spotlight { position: absolute; border: 1px solid #fff7c9; border-radius: 12px; box-shadow: 0 0 0 4px #ffe21c24, 0 0 32px #fff2ac20; }
.tutorial-card { position: absolute; width: min(400px, calc(100vw - 48px)); max-height: calc(100dvh - 48px); overflow: auto; padding: 22px; color: #29352e; background: linear-gradient(145deg, #fffef6 0%, #fff 70%); border: 1px solid #ffffffb3; border-radius: 18px; box-shadow: 0 24px 80px #10201940, 0 4px 16px #1020191a; pointer-events: auto; outline: none; animation: tutorial-appear 220ms ease-out; scrollbar-width: thin; }
.tutorial-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 19px; }
.tutorial-kicker { display: inline-flex; align-items: center; gap: 7px; color: #7c806f; font-size: 10px; font-weight: 650; letter-spacing: 1.3px; }
.tutorial-spark { color: #b99b13; font-size: 18px; }
.tutorial-close { display: grid; place-items: center; width: 28px; height: 28px; padding: 0; color: #8b9187; background: #f0f2eb; border: 0; border-radius: 50%; font-size: 20px; cursor: pointer; }
.tutorial-close:hover { color: #29352e; background: #e5e9df; }
.tutorial-sections { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; margin-bottom: 24px; padding: 4px; background: #f0f2e9; border: 1px solid #e9ecdf; border-radius: 9px; }
.tutorial-sections button { display: flex; justify-content: center; align-items: center; gap: 5px; min-height: 32px; padding: 0 4px; color: #828878; background: transparent; border: 0; border-radius: 6px; font-size: 11px; cursor: pointer; white-space: nowrap; }
.tutorial-sections button > span { font-size: 9px; opacity: .6; font-variant-numeric: tabular-nums; }
.tutorial-sections button.is-active { color: #485633; background: #fff; box-shadow: 0 2px 5px #26341b0d; font-weight: 650; }
.tutorial-step-label { margin: 0 0 9px; color: #8d957e; font-size: 10px; letter-spacing: .8px; font-variant-numeric: tabular-nums; }
.tutorial-content h2 { margin: 0 0 12px; color: #2f3b30; font-size: 21px; line-height: 1.45; font-weight: 650; letter-spacing: -.5px; }
#tutorial-description { margin: 0; color: #687164; font-size: 13px; line-height: 1.9; }
.tutorial-note { margin: 16px 0 0; padding-left: 10px; color: #8a8e79; border-left: 2px solid #ddd69a; font-size: 11px; line-height: 1.7; }
.tutorial-gate { margin: 13px 0 0; padding: 9px 10px; color: #746118; background: #fff8d9; border: 1px solid #f0e5ab; border-radius: 6px; font-size: 11px; line-height: 1.5; }
.tutorial-demo { display: flex; align-items: center; gap: 10px; margin-top: 16px; padding: 12px; background: #faf9f0; border: 1px solid #e9e5ce; border-radius: 9px; }
.tutorial-demo-image { display: grid; place-items: center; flex: 0 0 auto; width: 34px; height: 38px; color: #908239; background: linear-gradient(135deg, #f9e68d, #e3edc4); border-radius: 4px; font-size: 18px; font-weight: 700; }
.tutorial-demo-copy { min-width: 0; flex: 1; display: grid; gap: 5px; }
.tutorial-demo-copy strong { color: #68705a; font-size: 11px; font-weight: 600; }
.tutorial-demo-copy small { color: #8f947f; font-size: 9px; }
.tutorial-demo-ring { box-shadow: 0 0 0 5px #c7a90012; cursor: default; }
.tutorial-demo-download { color: #a3a68d; font-size: 19px; }
.tutorial-dots { display: flex; align-items: center; gap: 5px; margin: 22px 0 17px; }
.tutorial-dot { position: relative; flex: 1; min-width: 0; height: 18px; padding: 0; background: transparent; border: 0; cursor: pointer; }
.tutorial-dot::before { position: absolute; top: 7px; right: 0; left: 0; height: 3px; background: #e8ebdf; border-radius: 2px; content: ''; }
.tutorial-dot.is-complete::before { background: #bcc99d; }
.tutorial-dot[aria-current="step"]::before { background: #ad9626; }
.tutorial-dot:disabled { cursor: not-allowed; opacity: .35; }
.tutorial-footer { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-top: 15px; border-top: 1px solid #eceee4; }
.tutorial-footer > div { display: flex; gap: 8px; }
.tutorial-footer button { min-height: 36px; padding: 0 12px; border-radius: 7px; font-size: 11px; cursor: pointer; }
.tutorial-skip { padding-left: 0 !important; color: #919583; background: transparent; border: 0; }
.tutorial-skip:hover { color: #455238; }
.tutorial-prev { color: #738068; background: #fff; border: 1px solid #e1e6d7; }
.tutorial-prev:disabled { opacity: .35; cursor: default; }
.tutorial-next { display: flex; align-items: center; gap: 12px; color: #fffef0; background: #455b3e; border: 1px solid #455b3e; }
.tutorial-next:hover { background: #33482d; }
.tutorial-next:disabled { color: #858b7d; background: #e9ece4; border-color: #e9ece4; cursor: not-allowed; }
@keyframes tutorial-appear { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.site-stats { display: flex; align-items: center; gap: 10px; color: #655b2d; font-size: 11px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.site-stats span { display: inline-flex; align-items: baseline; gap: 4px; }
.site-stats strong { color: var(--ink); font-size: 12px; font-weight: 700; }
.policy-dialog { width: min(620px, calc(100% - 28px)); max-height: min(78dvh, 620px); padding: 20px; color: var(--ink); background: white; border: 1px solid var(--line); border-radius: 7px; box-shadow: 0 20px 70px #28261c35; }
.policy-dialog::backdrop { background: #28261c70; }
.policy-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.policy-heading h2 { margin: 0; font-size: 18px; font-weight: 650; }
.policy-close { width: 30px; height: 30px; padding: 0; color: #68634f; background: #f5f3e9; border: 0; border-radius: 4px; font-size: 21px; cursor: pointer; }
.policy-close:hover { background: #fff0a0; }
.policy-copy { max-height: calc(min(78dvh, 620px) - 135px); overflow: auto; padding: 5px 1px; color: #5d5a4e; font-size: 12px; line-height: 1.8; }
.policy-copy p { margin: 10px 0; }
.policy-copy strong { color: var(--ink); }
.policy-analytics-toggle { display: flex; align-items: center; gap: 10px; width: max-content; margin-top: 12px; color: #514800; font-size: 12px; font-weight: 650; cursor: pointer; }
.policy-analytics-toggle input { appearance: none; position: relative; width: 36px; height: 20px; flex: 0 0 auto; margin: 0; background: #d8d6ca; border: 1px solid #c7c4b4; border-radius: 12px; cursor: pointer; transition: background 140ms ease, border-color 140ms ease; }
.policy-analytics-toggle input::before { position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; background: white; border-radius: 50%; box-shadow: 0 1px 3px #28261c30; content: ''; transition: transform 140ms ease; }
.policy-analytics-toggle input:checked { background: #879c57; border-color: #718449; }
.policy-analytics-toggle input:checked::before { transform: translateX(16px); }
.policy-analytics-toggle > span:last-child { min-width: 42px; color: var(--muted); font-size: 11px; font-weight: 400; }
.policy-done { display: flex; min-width: 76px; margin: 5px 0 0 auto; }
@media (max-width: 640px) {
  body.has-tutorial { padding-bottom: 80vh; }
  .tutorial-target { scroll-margin-top: 76px; }
  .topbar-actions { gap: 8px; }
  .tutorial-button { gap: 5px; min-height: 30px; padding: 0 7px; font-size: 10px; }
  .tutorial-button > span { width: 14px; height: 14px; font-size: 9px; }
  .tutorial-card { width: calc(100vw - 24px); max-height: calc(100dvh - 24px); padding: 18px; border-radius: 15px; }
  .tutorial-card-top { margin-bottom: 13px; }
  .tutorial-sections { margin-bottom: 18px; }
  .tutorial-content h2 { font-size: 19px; }
  #tutorial-description { font-size: 12px; line-height: 1.8; }
  .tutorial-dots { margin: 16px 0 10px; }
  .tutorial-footer { padding-top: 12px; }
}
@media (max-width: 360px) {
  .brand { gap: 6px; font-size: 10px; }
  .brand-mark { width: 23px; height: 23px; }
  .tutorial-button { width: 30px; padding: 0; gap: 0; overflow: hidden; font-size: 0; }
  .tutorial-button > span { width: 16px; height: 16px; flex: 0 0 auto; font-size: 11px; }
  .tutorial-card { padding: 15px; }
  .tutorial-sections button { font-size: 10px; }
  .tutorial-sections button > span { display: none; }
}

@media (max-width: 640px) {
  .site-stats { gap: 7px; font-size: 10px; }
  .site-stats strong { font-size: 11px; }
  .policy-dialog { padding: 16px; }
  .policy-copy { font-size: 11px; }
}

@media (max-width: 360px) {
  .site-stats { gap: 5px; font-size: 9px; }
  .site-stats strong { font-size: 10px; }
}