/* ========================================================================
   一刻在线工具箱 V3 Design System
   Tokens -> Base -> Components -> Layouts -> Legacy compatibility
   ======================================================================== */

:root {
  --yk-primary: #2563eb;
  --yk-primary-600: #1d4ed8;
  --yk-primary-700: #1e40af;
  --yk-accent: #7c3aed;
  --yk-success: #059669;
  --yk-danger: #dc2626;
  --yk-warning: #d97706;
  --yk-bg: #f6f8fc;
  --yk-bg-soft: #eef3fb;
  --yk-surface: #ffffff;
  --yk-surface-soft: #f8fafc;
  --yk-surface-muted: #f1f5f9;
  --yk-ink: #0f172a;
  --yk-text: #334155;
  --yk-muted: #64748b;
  --yk-faint: #94a3b8;
  --yk-line: #dfe7f1;
  --yk-line-strong: #cbd5e1;
  --yk-focus: rgba(37, 99, 235, .16);
  --yk-primary-soft: #eff6ff;
  --yk-accent-soft: #f5f3ff;
  --yk-success-soft: #ecfdf5;
  --yk-danger-soft: #fef2f2;
  --yk-shadow-xs: 0 1px 2px rgba(15, 23, 42, .04);
  --yk-shadow-sm: 0 7px 22px rgba(15, 23, 42, .055);
  --yk-shadow-md: 0 16px 40px rgba(15, 23, 42, .075);
  --yk-shadow-lg: 0 28px 70px rgba(15, 23, 42, .11);
  --yk-radius-xs: 8px;
  --yk-radius-sm: 10px;
  --yk-radius-md: 12px;
  --yk-radius-lg: 16px;
  --yk-radius-xl: 20px;
  --yk-radius-2xl: 24px;
  --yk-page: 1200px;
  --yk-control: 360px;
  --yk-header-h: 64px;
  --yk-ease: cubic-bezier(.2,.8,.2,1);
  --yk-font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --yk-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

html[data-theme="dark"] {
  --yk-bg: #09111f;
  --yk-bg-soft: #0d1728;
  --yk-surface: #111c2f;
  --yk-surface-soft: #0f1a2c;
  --yk-surface-muted: #152238;
  --yk-ink: #f8fafc;
  --yk-text: #d7e1ef;
  --yk-muted: #91a3ba;
  --yk-faint: #71839b;
  --yk-line: #26364d;
  --yk-line-strong: #344760;
  --yk-focus: rgba(96, 165, 250, .20);
  --yk-primary-soft: rgba(37, 99, 235, .16);
  --yk-accent-soft: rgba(124, 58, 237, .14);
  --yk-success-soft: rgba(5, 150, 105, .14);
  --yk-danger-soft: rgba(220, 38, 38, .14);
  --yk-shadow-xs: 0 1px 2px rgba(0,0,0,.18);
  --yk-shadow-sm: 0 8px 24px rgba(0,0,0,.18);
  --yk-shadow-md: 0 18px 44px rgba(0,0,0,.23);
  --yk-shadow-lg: 0 30px 80px rgba(0,0,0,.32);
}

*, *::before, *::after { box-sizing: border-box; }
html { min-width: 320px; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--yk-font);
  color: var(--yk-text);
  background:
    radial-gradient(900px 480px at 12% -10%, rgba(59,130,246,.10), transparent 60%),
    radial-gradient(780px 420px at 90% 6%, rgba(124,58,237,.075), transparent 58%),
    linear-gradient(180deg, var(--yk-bg-soft) 0, var(--yk-bg) 240px, var(--yk-bg) 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color .25s ease, color .25s ease;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: .48;
  background-image:
    linear-gradient(rgba(148,163,184,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,.04) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.65), transparent 58%);
}
html[data-theme="dark"] body::before { opacity: .22; }
body.dark-mode { color-scheme: dark; }
img, canvas, svg, video { max-width: 100%; }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
a { color: var(--yk-primary); }
::selection { background: rgba(37,99,235,.18); color: var(--yk-ink); }
:focus-visible { outline: none; box-shadow: 0 0 0 4px var(--yk-focus); }
[hidden] { display: none !important; }

/* ----------------------------- Site chrome ----------------------------- */
.yk-sitebar {
  position: sticky;
  top: 12px;
  z-index: 800;
  width: min(var(--yk-page), calc(100% - 28px));
  min-height: var(--yk-header-h);
  margin: 12px auto 0;
  padding: 9px 10px 9px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid color-mix(in srgb, var(--yk-line) 88%, transparent);
  border-radius: 18px;
  background: color-mix(in srgb, var(--yk-surface) 90%, transparent);
  box-shadow: 0 12px 34px rgba(15,23,42,.07);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
}
html[data-theme="dark"] .yk-sitebar { box-shadow: 0 12px 34px rgba(0,0,0,.22); }
.yk-sitebar-left, .yk-sitebar-right, .yk-sitebar-nav { display: flex; align-items: center; gap: 8px; min-width: 0; }
.yk-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--yk-ink);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -.02em;
  white-space: nowrap;
}
.yk-brand img { width: 32px; height: 32px; border-radius: 9px; box-shadow: var(--yk-shadow-xs); }
.yk-sitebar-nav { margin-left: 10px; }
.yk-sitebar-nav a {
  color: var(--yk-muted);
  text-decoration: none;
  padding: 9px 11px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 650;
  transition: .2s var(--yk-ease);
}
.yk-sitebar-nav a:hover, .yk-sitebar-nav a.is-active { color: var(--yk-ink); background: var(--yk-surface-muted); }
.yk-icon-btn, .yk-command-btn {
  min-height: 40px !important;
  border: 1px solid var(--yk-line) !important;
  border-radius: 11px !important;
  background: var(--yk-surface) !important;
  color: var(--yk-text) !important;
  box-shadow: var(--yk-shadow-xs) !important;
  cursor: pointer;
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px !important;
  font-weight: 700 !important;
  padding: 0 12px !important;
  width: auto !important;
  transition: transform .18s var(--yk-ease), border-color .18s, background .18s !important;
}
.yk-icon-btn { width: 40px !important; padding: 0 !important; }
.yk-icon-btn svg, .yk-command-btn svg { width: 17px; height: 17px; stroke-width: 1.9; }
.yk-icon-btn:hover, .yk-command-btn:hover { transform: translateY(-1px); border-color: var(--yk-line-strong) !important; background: var(--yk-surface-soft) !important; }
.yk-keycap { padding: 2px 6px; border-radius: 6px; border: 1px solid var(--yk-line); background: var(--yk-surface-muted); color: var(--yk-faint); font-size: 10px; font-weight: 800; line-height: 1.4; }

/* ----------------------------- Typography ------------------------------ */
.yk-eyebrow, .section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--yk-primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.yk-hero h1, .yk-home-hero h1 { color: var(--yk-ink); letter-spacing: -.045em; text-wrap: balance; }
.yk-hero p, .yk-home-hero p { color: var(--yk-muted); }

/* ----------------------------- Hero ------------------------------------ */
.yk-container, .yk-home-main { width: min(var(--yk-page), calc(100% - 28px)); margin: 0 auto; }
.yk-container { padding: 22px 0 44px; }
.yk-hero {
  position: relative;
  overflow: hidden;
  margin: 0 0 20px;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--yk-line);
  border-radius: var(--yk-radius-2xl);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--yk-surface) 96%, transparent), color-mix(in srgb, var(--yk-primary-soft) 36%, var(--yk-surface))),
    var(--yk-surface);
  box-shadow: var(--yk-shadow-sm);
}
.yk-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -100px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,.15), rgba(124,58,237,.07) 45%, transparent 70%);
  pointer-events: none;
}
.yk-hero h1 { position: relative; z-index: 1; margin: 0; max-width: 780px; font-size: clamp(26px, 4vw, 38px); line-height: 1.14; font-weight: 820; }
.yk-hero p { position: relative; z-index: 1; margin: 12px 0 0; max-width: 800px; font-size: 14px; line-height: 1.8; }
.trust-row { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
.trust-row span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--yk-line);
  background: color-mix(in srgb, var(--yk-surface) 82%, transparent);
  color: var(--yk-muted);
  font-size: 12px;
  font-weight: 700;
}
.trust-row span:first-child { color: var(--yk-primary); border-color: color-mix(in srgb, var(--yk-primary) 20%, var(--yk-line)); background: var(--yk-primary-soft); }

/* ----------------------------- Surfaces / cards ------------------------ */
.yk-grid { display: grid; grid-template-columns: minmax(300px, var(--yk-control)) minmax(0, 1fr); gap: 18px; align-items: start; }
.yk-card,
.yk-tool-page-v3 .settings-panel,
.yk-tool-page-v3 .controls-panel,
.yk-tool-page-v3 .controls-card,
.yk-tool-page-v3 .main-panel,
.yk-tool-page-v3 .result-area,
.yk-tool-page-v3 .results-panel,
.yk-tool-page-v3 .preview-panel,
.yk-tool-page-v3 .canvas-panel,
.yk-tool-page-v3 .list-card,
.yk-tool-page-v3 .panel,
.yk-tool-page-v3 .converter,
.yk-tool-page-v3 .text-layout > *,
.yk-tool-page-v3 .main-content > section {
  border: 1px solid var(--yk-line) !important;
  border-radius: var(--yk-radius-xl) !important;
  background: var(--yk-surface) !important;
  box-shadow: var(--yk-shadow-sm) !important;
}
.yk-card { padding: 20px; min-width: 0; }
.yk-card > h2, .yk-tool-page-v3 .settings-panel > h2, .yk-tool-page-v3 .controls-panel > h2 {
  margin: 0 0 16px;
  color: var(--yk-ink);
  font-size: 17px;
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: -.02em;
}
.yk-control-card { position: sticky; top: 92px; }
.yk-result-panel { min-height: 440px; }

/* ----------------------------- Form fields ----------------------------- */
.yk-field, .option-group, .control-group, .field-row, .field, .textarea-group { margin: 0 0 14px; }
.yk-field label,
.yk-tool-page-v3 label:not(.pos-btn),
.field-label {
  display: block;
  margin: 0 0 7px;
  color: var(--yk-text);
  font-size: 13px;
  line-height: 1.45;
  font-weight: 700;
}
.yk-tool-page-v3 input[type="text"],
.yk-tool-page-v3 input[type="search"],
.yk-tool-page-v3 input[type="number"],
.yk-tool-page-v3 input[type="url"],
.yk-tool-page-v3 input[type="password"],
.yk-tool-page-v3 input[type="email"],
.yk-tool-page-v3 select,
.yk-tool-page-v3 textarea,
.yk-home-v3 input[type="search"] {
  width: 100% !important;
  min-height: 44px;
  margin: 0;
  padding: 10px 12px !important;
  border: 1px solid var(--yk-line) !important;
  border-radius: var(--yk-radius-md) !important;
  outline: none;
  background: var(--yk-surface-soft) !important;
  color: var(--yk-ink) !important;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.45) !important;
  font-size: 14px !important;
  line-height: 1.45;
  transition: border-color .18s, background .18s, box-shadow .18s !important;
}
html[data-theme="dark"] .yk-tool-page-v3 input[type="text"],
html[data-theme="dark"] .yk-tool-page-v3 input[type="search"],
html[data-theme="dark"] .yk-tool-page-v3 input[type="number"],
html[data-theme="dark"] .yk-tool-page-v3 input[type="url"],
html[data-theme="dark"] .yk-tool-page-v3 input[type="password"],
html[data-theme="dark"] .yk-tool-page-v3 input[type="email"],
html[data-theme="dark"] .yk-tool-page-v3 select,
html[data-theme="dark"] .yk-tool-page-v3 textarea,
html[data-theme="dark"] .yk-home-v3 input[type="search"] { box-shadow: inset 0 1px 0 rgba(255,255,255,.03) !important; }
.yk-tool-page-v3 input:hover, .yk-tool-page-v3 select:hover, .yk-tool-page-v3 textarea:hover, .yk-home-v3 input[type="search"]:hover { border-color: var(--yk-line-strong) !important; }
.yk-tool-page-v3 input:focus, .yk-tool-page-v3 select:focus, .yk-tool-page-v3 textarea:focus, .yk-home-v3 input[type="search"]:focus {
  border-color: color-mix(in srgb, var(--yk-primary) 68%, var(--yk-line)) !important;
  background: var(--yk-surface) !important;
  box-shadow: 0 0 0 4px var(--yk-focus) !important;
}
.yk-tool-page-v3 textarea { min-height: 150px; resize: vertical; line-height: 1.65; }
.yk-tool-page-v3 select { appearance: none; padding-right: 38px !important; background-image: linear-gradient(45deg,transparent 50%,var(--yk-muted) 50%),linear-gradient(135deg,var(--yk-muted) 50%,transparent 50%) !important; background-position: calc(100% - 16px) 19px,calc(100% - 11px) 19px !important; background-size: 5px 5px,5px 5px !important; background-repeat:no-repeat !important; }
.yk-tool-page-v3 input[type="color"] {
  width: 100% !important;
  height: 44px !important;
  padding: 5px !important;
  border: 1px solid var(--yk-line) !important;
  border-radius: var(--yk-radius-md) !important;
  background: var(--yk-surface-soft) !important;
  cursor: pointer;
}
.yk-tool-page-v3 input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.yk-tool-page-v3 input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 8px; }
.yk-tool-page-v3 input[type="range"] {
  width: 100% !important;
  height: 24px;
  margin: 2px 0;
  padding: 0;
  appearance: none;
  background: transparent !important;
  cursor: pointer;
  accent-color: var(--yk-primary);
}
.yk-tool-page-v3 input[type="range"]::-webkit-slider-runnable-track { height: 5px; border-radius: 999px; background: linear-gradient(90deg, color-mix(in srgb,var(--yk-primary) 76%,white), var(--yk-surface-muted)); }
.yk-tool-page-v3 input[type="range"]::-webkit-slider-thumb { appearance: none; width: 18px; height: 18px; margin-top: -6.5px; border: 3px solid var(--yk-surface); border-radius: 50%; background: var(--yk-primary); box-shadow: 0 1px 7px rgba(37,99,235,.28); }
.yk-tool-page-v3 input[type="checkbox"], .yk-tool-page-v3 input[type="radio"] { width: 18px !important; height: 18px !important; min-height: 0 !important; margin: 0; accent-color: var(--yk-primary); flex: 0 0 auto; }
.two-col, .two-cols, .field-row, .inline-row, .color-row, .preset-row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.checkbox-group, .radio-group, .checkbox-inline, .switch-line { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.checkbox-group label, .radio-group label, .checkbox-inline label, .switch-line label { margin: 0 !important; font-weight: 600 !important; }

/* ----------------------------- Buttons --------------------------------- */
.yk-tool-page-v3 button,
.yk-tool-page-v3 .button,
.yk-tool-page-v3 a.button,
.yk-actions a,
.yk-actions button {
  min-height: 42px;
  padding: 9px 14px !important;
  border: 1px solid transparent !important;
  border-radius: var(--yk-radius-md) !important;
  background: linear-gradient(180deg, #2f6df0, var(--yk-primary)) !important;
  color: #fff !important;
  box-shadow: 0 7px 16px rgba(37,99,235,.16), inset 0 1px 0 rgba(255,255,255,.15) !important;
  text-decoration: none !important;
  font-size: 13px !important;
  line-height: 1.25;
  font-weight: 750 !important;
  cursor: pointer;
  text-align: center;
  transition: transform .17s var(--yk-ease), box-shadow .17s, filter .17s, opacity .17s !important;
}
.yk-tool-page-v3 button:hover:not(:disabled), .yk-tool-page-v3 .button:hover:not(.disabled), .yk-actions button:hover:not(:disabled), .yk-actions a:hover { transform: translateY(-1px); filter: brightness(1.025); box-shadow: 0 10px 24px rgba(37,99,235,.21), inset 0 1px 0 rgba(255,255,255,.16) !important; }
.yk-tool-page-v3 button:active:not(:disabled), .yk-actions button:active:not(:disabled) { transform: translateY(0) scale(.985); }
.yk-tool-page-v3 button:disabled, .yk-tool-page-v3 .button.disabled, .yk-actions button:disabled {
  opacity: .48 !important;
  cursor: not-allowed !important;
  transform: none !important;
  filter: grayscale(.15) !important;
  box-shadow: none !important;
}
.yk-tool-page-v3 .secondary-button,
.yk-tool-page-v3 .secondary-btn,
.yk-tool-page-v3 .ghost-btn,
.yk-tool-page-v3 .clear-btn,
.yk-tool-page-v3 .upload-button-alt,
.yk-tool-page-v3 .preview-nav button,
.yk-tool-page-v3 .pos-btn,
.yk-tool-page-v3 .tab:not(.active),
.yk-tool-page-v3 .yk-tab:not(.active),
.yk-tool-page-v3 .size-preset:not(.active),
.yk-tool-page-v3 .format-btn:not(.active),
.yk-tool-page-v3 .color-btn:not(.active) {
  border-color: var(--yk-line) !important;
  background: var(--yk-surface-soft) !important;
  color: var(--yk-text) !important;
  box-shadow: var(--yk-shadow-xs) !important;
}
.yk-tool-page-v3 .secondary-button:hover:not(:disabled), .yk-tool-page-v3 .secondary-btn:hover:not(:disabled), .yk-tool-page-v3 .ghost-btn:hover:not(:disabled), .yk-tool-page-v3 .clear-btn:hover:not(:disabled), .yk-tool-page-v3 .upload-button-alt:hover:not(:disabled), .yk-tool-page-v3 .pos-btn:hover:not(:disabled) { background: var(--yk-surface-muted) !important; box-shadow: var(--yk-shadow-xs) !important; }
.yk-tool-page-v3 .download-button:not(:disabled), .yk-tool-page-v3 .download-btn:not(:disabled), .yk-tool-page-v3 #downloadZip:not(:disabled), .yk-tool-page-v3 #downloadZipBtn:not(:disabled), .yk-tool-page-v3 #batchDownloadBtn:not(:disabled) {
  background: linear-gradient(180deg, #0aa174, var(--yk-success)) !important;
  box-shadow: 0 7px 16px rgba(5,150,105,.15), inset 0 1px 0 rgba(255,255,255,.16) !important;
}
.yk-tool-page-v3 .pos-btn { min-height: 34px !important; padding: 6px !important; }
.yk-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }
.yk-actions > * { flex: 1 1 130px; }
.yk-tool-page-v3 .button-group, .yk-tool-page-v3 .button-row, .yk-tool-page-v3 .actions, .yk-tool-page-v3 .action-grid { display: flex; flex-wrap: wrap; gap: 9px; }

/* ----------------------------- Upload zones ---------------------------- */
.yk-upload-zone,
.yk-tool-page-v3 .upload-area-container,
.yk-tool-page-v3 .file-upload-area,
.yk-tool-page-v3 .drop-zone,
.yk-tool-page-v3 .upload-area,
.yk-tool-page-v3 .image-drop,
.yk-tool-page-v3 .upload-box,
.yk-tool-page-v3 .upload-section {
  position: relative;
  overflow: hidden;
  min-height: 142px;
  margin-bottom: 16px;
  padding: 24px 18px !important;
  border: 1.5px dashed color-mix(in srgb, var(--yk-primary) 34%, var(--yk-line)) !important;
  border-radius: var(--yk-radius-lg) !important;
  background: linear-gradient(180deg, color-mix(in srgb, var(--yk-primary-soft) 34%, var(--yk-surface)), var(--yk-surface-soft)) !important;
  color: var(--yk-muted) !important;
  text-align: center;
  box-shadow: none !important;
  cursor: pointer;
  transition: border-color .18s, background .18s, transform .18s var(--yk-ease), box-shadow .18s !important;
}
.yk-upload-zone:hover,
.yk-tool-page-v3 .upload-area-container:hover,
.yk-tool-page-v3 .file-upload-area:hover,
.yk-tool-page-v3 .drop-zone:hover,
.yk-tool-page-v3 .upload-box:hover,
.yk-upload-zone.is-dragover,
.yk-tool-page-v3 .dragover {
  border-color: color-mix(in srgb, var(--yk-primary) 72%, var(--yk-line)) !important;
  background: color-mix(in srgb, var(--yk-primary-soft) 55%, var(--yk-surface)) !important;
  transform: translateY(-1px);
  box-shadow: 0 0 0 4px var(--yk-focus) !important;
}
.yk-upload-zone input[type="file"] { position: absolute; inset: 0; opacity: 0; width: 100%; height: 100%; cursor: pointer; }
.upload-icon { width: 46px; height: 46px; margin: 0 auto 10px !important; display: grid; place-items: center; border-radius: 14px; background: var(--yk-primary-soft); color: var(--yk-primary); font-size: 25px !important; line-height: 1 !important; box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--yk-primary) 10%, transparent); }
.upload-text, .yk-upload-zone strong { display: block; margin: 0 !important; color: var(--yk-ink) !important; font-size: 15px !important; font-weight: 800 !important; }
.upload-hint, .yk-upload-zone p { margin: 5px 0 0 !important; color: var(--yk-muted) !important; font-size: 12px !important; line-height: 1.6; }
.yk-upload-zone .upload-button-alt { position: relative; z-index: 2; margin-top: 13px; pointer-events: none; }

/* ----------------------------- Stats / results ------------------------- */
.yk-stat-grid, .summary-card, .info-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; margin: 0 0 16px; }
.summary-card { grid-template-columns: repeat(4, minmax(0,1fr)); }
.yk-stat, .summary-card > div, .status-card, .summary-box, .batch-info, .info-row {
  min-width: 0;
  padding: 13px !important;
  border: 1px solid var(--yk-line) !important;
  border-radius: var(--yk-radius-lg) !important;
  background: var(--yk-surface-soft) !important;
  box-shadow: none !important;
}
.yk-stat strong, .summary-card strong { display: block; margin-bottom: 2px; color: var(--yk-ink); font-size: 18px; line-height: 1.3; font-weight: 800; letter-spacing: -.025em; overflow-wrap: anywhere; }
.yk-stat span, .summary-card span { color: var(--yk-muted); font-size: 11px; line-height: 1.5; }
.yk-result-grid, .preview-grid, .frames-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.yk-result-card, .file-item, .preview-card .image-box, .image-box, .preview-box, .qr-preview, .empty-state, .placeholder, .image-section {
  border: 1px solid var(--yk-line) !important;
  border-radius: var(--yk-radius-lg) !important;
  background: var(--yk-surface-soft) !important;
  box-shadow: none !important;
}
.yk-result-card { padding: 12px; overflow: hidden; }
.yk-before-after { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.yk-before-after > div { position: relative; min-height: 120px; border: 1px solid var(--yk-line); border-radius: var(--yk-radius-md); background: var(--yk-surface-muted); overflow: hidden; display: grid; place-items: center; }
.yk-before-after img { width: 100%; height: 100%; max-height: 190px; object-fit: contain; }
.yk-before-after span { position: absolute; left: 7px; top: 7px; z-index: 2; padding: 3px 7px; border-radius: 999px; background: rgba(15,23,42,.72); color:#fff; font-size:10px; }
.yk-compare-list, .file-list { display: grid; gap: 9px; }
.yk-compare-row, .file-item { padding: 11px 12px !important; border: 1px solid var(--yk-line) !important; border-radius: var(--yk-radius-md) !important; background: var(--yk-surface-soft) !important; }
.empty-state { padding: 36px 20px !important; text-align: center; color: var(--yk-muted) !important; }
.empty-icon { width: 48px; height: 48px; margin: 0 auto 10px; display:grid; place-items:center; border-radius:14px; background:var(--yk-surface-muted); color:var(--yk-primary); font-size:22px; }
.preview-card { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.preview-card .image-box, .image-box { min-height: 230px; padding: 16px !important; display:flex; flex-direction:column; align-items:center; justify-content:center; }
.preview-card img, .image-box img, .preview-img { border-radius: var(--yk-radius-md) !important; }
.canvas-container, .canvas-wrapper, .image-wrapper, .preview-area {
  border: 1px solid var(--yk-line) !important;
  border-radius: var(--yk-radius-xl) !important;
  background-color: var(--yk-surface-soft) !important;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.22) !important;
}
.canvas-container, .canvas-wrapper { overflow: hidden; }

/* ----------------------------- Tabs ------------------------------------ */
.yk-tabs, .tabs, .format-selector, .aspect-ratios, .view-controls { display: flex; flex-wrap: wrap; gap: 7px; padding: 5px; border: 1px solid var(--yk-line); border-radius: 14px; background: var(--yk-surface-soft); }
.yk-tab, .tab, .format-btn, .size-preset, .color-btn {
  min-height: 36px !important;
  padding: 7px 11px !important;
  border-radius: 10px !important;
  font-size: 12px !important;
}
.yk-tab.active, .tab.active, .format-btn.active, .size-preset.active, .color-btn.active { background: var(--yk-ink) !important; color: var(--yk-surface) !important; border-color: transparent !important; box-shadow: none !important; }

/* ----------------------------- Text / code outputs --------------------- */
.yk-output, .code, pre, .result-area textarea, .converter textarea {
  border: 1px solid var(--yk-line) !important;
  border-radius: var(--yk-radius-lg) !important;
  background: var(--yk-surface-soft) !important;
  color: var(--yk-text) !important;
}
.yk-output { min-height: 180px; padding: 14px; overflow: auto; }
.code, pre { font-family: var(--yk-mono); font-size: 12px; line-height: 1.65; }
.yk-muted, .desc, .description, .option-note, .hint, .tips-text, .status-text { color: var(--yk-muted) !important; font-size: 12px !important; line-height: 1.7; }

/* ----------------------------- SEO + related --------------------------- */
.seo-note-wrap {
  width: 100%;
  max-width: var(--yk-page) !important;
  margin: 26px auto 0 !important;
  padding: 20px 4px 4px !important;
  border: 0 !important;
  border-top: 1px solid var(--yk-line) !important;
  color: var(--yk-muted) !important;
  background: transparent !important;
  box-shadow: none !important;
}
.seo-note-item { margin: 0 0 14px; }
.seo-note-item h2 { margin: 0 0 5px !important; color: var(--yk-text) !important; font-size: 12px !important; font-weight: 800 !important; }
.seo-note-item p, .seo-note-item li, .seo-note-item summary { color: var(--yk-muted) !important; font-size: 11.5px !important; line-height: 1.8 !important; }
.seo-note-item details { padding: 3px 0; }
.seo-note-item summary { cursor: pointer; font-weight: 700; }
.yk-related-tools { width: min(var(--yk-page), calc(100% - 28px)); margin: 0 auto 44px; padding-top: 4px; }
.yk-related-head { display:flex; justify-content:space-between; align-items:end; gap:16px; margin-bottom:12px; }
.yk-related-head h2 { margin:0; color:var(--yk-ink); font-size:18px; letter-spacing:-.02em; }
.yk-related-head p { margin:0; color:var(--yk-muted); font-size:12px; }
.yk-related-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px; }
.yk-related-grid a { display:flex; flex-direction:column; gap:5px; padding:14px; border:1px solid var(--yk-line); border-radius:var(--yk-radius-lg); background:var(--yk-surface); color:var(--yk-ink); text-decoration:none; box-shadow:var(--yk-shadow-xs); transition:.18s var(--yk-ease); }
.yk-related-grid a:hover { transform:translateY(-2px); border-color:color-mix(in srgb,var(--yk-primary) 25%,var(--yk-line)); box-shadow:var(--yk-shadow-sm); }
.yk-related-grid strong { font-size:13px; }
.yk-related-grid span { color:var(--yk-muted); font-size:11px; line-height:1.55; }

/* ----------------------------- Legacy page shell ----------------------- */
body.yk-tool-page-v3 {
  /* map old page variables into the unified design system */
  --primary-color: var(--yk-primary);
  --primary: var(--yk-primary);
  --text-color: var(--yk-text);
  --text-primary: var(--yk-ink);
  --text-secondary: var(--yk-muted);
  --light-text: var(--yk-muted);
  --tool-bg: var(--yk-bg);
  --panel-bg: var(--yk-surface);
  --input-bg: var(--yk-surface-soft);
  --border-color: var(--yk-line);
  --success-color: var(--yk-success);
  --secondary-btn-bg: var(--yk-surface-muted);
  display: block !important;
  align-items: initial !important;
  justify-content: initial !important;
  padding: 0 !important;
  overflow-x: hidden;
}
.yk-legacy-main { padding-top: 22px; }
.yk-legacy-main > .container,
.yk-legacy-main > .page-shell {
  width: 100% !important;
  max-width: none !important;
  min-height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}
.yk-legacy-main > .container { display: flex; gap: 18px !important; align-items: flex-start; }
.yk-legacy-main > .page-shell { display: block; }
.yk-tool-page-v3 .settings-panel, .yk-tool-page-v3 .controls, .yk-tool-page-v3 .controls-panel { width: var(--yk-control) !important; min-width: 0 !important; flex: 0 0 var(--yk-control) !important; padding: 20px !important; }
.yk-tool-page-v3 .results-panel, .yk-tool-page-v3 .main-content, .yk-tool-page-v3 .preview-panel, .yk-tool-page-v3 .canvas-container { flex: 1 1 auto; min-width: 0; }
.yk-tool-page-v3 .results-panel { padding: 18px !important; }
.yk-tool-page-v3 .main-content { display: grid; gap: 16px; }
.yk-tool-page-v3 .main-content > section { padding: 18px; }
.yk-tool-page-v3 .controls > h1, .yk-tool-page-v3 .controls > h2, .yk-tool-page-v3 .settings-panel > h1, .yk-tool-page-v3 .settings-panel > h2 { color:var(--yk-ink); font-size:18px !important; line-height:1.35; font-weight:800; letter-spacing:-.02em; }
.yk-tool-page-v3 hr { height:1px; border:0 !important; background:var(--yk-line); margin:14px 0 !important; }

/* Watermark workspace */
body.watermark-tool.yk-tool-page-v3 .container { max-width: none !important; }
body.watermark-tool.yk-tool-page-v3 .controls { position: sticky; top: 92px; max-height: calc(100vh - 112px); overflow:auto; scrollbar-width:thin; }
body.watermark-tool.yk-tool-page-v3 .canvas-container { min-height: 620px; padding: 16px; display:flex; align-items:center; justify-content:center; }
body.watermark-tool.yk-tool-page-v3 #canvas { max-height: calc(100vh - 150px) !important; border-radius: 10px; }
body.watermark-tool.yk-tool-page-v3 .position-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:6px; }

/* Batch cropper / custom shells */
.yk-tool-page-v3 .workspace-grid { display:grid; grid-template-columns:minmax(300px,var(--yk-control)) minmax(0,1fr); gap:18px; align-items:start; }
.yk-tool-page-v3 .hero-card { display:none !important; }
.yk-tool-page-v3 .controls-card { padding:20px !important; position:sticky; top:92px; }
.yk-tool-page-v3 .list-card, .yk-tool-page-v3 .canvas-panel { padding:18px !important; }

/* Some old pages use .container as vertical stack */
.yk-tool-page-v3[data-tool="base64-coder"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-color-picker"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-cropper"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="gif-tools"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-pdf"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-exif"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="id-photo"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-converter"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-combiner"] .yk-legacy-main > .container { display:block; }

/* Keep specialized editor sections coherent */
.yk-tool-page-v3 .tabs { margin-bottom: 14px; }
.yk-tool-page-v3 .tab-panel { min-width:0; }
.yk-tool-page-v3 .converters, .yk-tool-page-v3 .converter-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; }
.yk-tool-page-v3 .palette { display:flex; flex-wrap:wrap; gap:8px; }
.yk-tool-page-v3 .gradient-preview { min-height:100px; border:1px solid var(--yk-line); border-radius:var(--yk-radius-lg); }

/* ----------------------------- Command palette ------------------------- */
.yk-command-mask { position:fixed; inset:0; z-index:2000; display:none; padding:12vh 16px 20px; background:rgba(3,7,18,.46); backdrop-filter:blur(9px); -webkit-backdrop-filter:blur(9px); }
.yk-command-mask.is-open { display:block; animation:yk-fade .16s ease both; }
.yk-command-panel { width:min(650px,100%); margin:0 auto; overflow:hidden; border:1px solid var(--yk-line); border-radius:20px; background:var(--yk-surface); box-shadow:var(--yk-shadow-lg); }
.yk-command-search { display:flex; align-items:center; gap:10px; padding:13px 14px; border-bottom:1px solid var(--yk-line); }
.yk-command-search svg { width:20px; height:20px; color:var(--yk-muted); flex:0 0 auto; }
.yk-command-search input { width:100%; min-height:42px; padding:0 !important; border:0 !important; outline:0 !important; background:transparent !important; color:var(--yk-ink) !important; box-shadow:none !important; font-size:15px !important; }
.yk-command-results { max-height:52vh; overflow:auto; padding:7px; }
.yk-command-results a { display:flex; align-items:center; justify-content:space-between; gap:16px; padding:11px 12px; border-radius:11px; color:var(--yk-ink); text-decoration:none; }
.yk-command-results a:hover, .yk-command-results a.is-active { background:var(--yk-surface-muted); }
.yk-command-results strong { display:block; font-size:13px; }
.yk-command-results small { color:var(--yk-muted); font-size:10px; white-space:nowrap; }
.yk-command-empty { padding:26px 14px; text-align:center; color:var(--yk-muted); font-size:13px; }

/* ----------------------------- Toast ----------------------------------- */
.yk-toast-stack { position:fixed; right:18px; bottom:18px; z-index:2200; display:grid; gap:8px; pointer-events:none; }
.yk-toast { min-width:210px; max-width:min(360px,calc(100vw - 36px)); padding:11px 13px; border:1px solid var(--yk-line); border-radius:12px; background:var(--yk-surface); color:var(--yk-text); box-shadow:var(--yk-shadow-md); font-size:12px; font-weight:650; animation:yk-toast-in .22s var(--yk-ease) both; }

/* ========================================================================
   Homepage V3
   ======================================================================== */
body.yk-home-v3 { padding:0; }
.yk-home-main { padding: 30px 0 60px; }
.yk-home-hero {
  position:relative;
  overflow:hidden;
  padding: clamp(46px, 7vw, 78px) 20px 36px;
  text-align:center;
}
.yk-home-hero::before { content:""; position:absolute; width:650px; height:360px; left:50%; top:-90px; transform:translateX(-50%); border-radius:50%; background:radial-gradient(circle,rgba(37,99,235,.16),rgba(124,58,237,.07) 46%,transparent 70%); filter:blur(2px); pointer-events:none; }
.yk-home-hero > * { position:relative; z-index:1; }
.yk-home-badge { display:inline-flex; align-items:center; gap:7px; min-height:30px; padding:5px 10px; border:1px solid var(--yk-line); border-radius:999px; background:color-mix(in srgb,var(--yk-surface) 82%,transparent); color:var(--yk-muted); font-size:11px; font-weight:750; box-shadow:var(--yk-shadow-xs); }
.yk-home-badge i { width:7px; height:7px; border-radius:50%; background:var(--yk-success); box-shadow:0 0 0 4px var(--yk-success-soft); }
.yk-home-hero h1 { margin:18px auto 0; max-width:850px; font-size:clamp(36px,7vw,62px); line-height:1.05; font-weight:860; }
.yk-home-hero h1 span { background:linear-gradient(110deg,var(--yk-primary),var(--yk-accent)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.yk-home-hero > p { max-width:720px; margin:18px auto 0; font-size:15px; line-height:1.85; }
.yk-home-search { max-width:760px; margin:28px auto 0; }
.yk-searchbox { display:flex; align-items:center; gap:10px; padding:8px 9px 8px 14px; border:1px solid color-mix(in srgb,var(--yk-primary) 14%,var(--yk-line)); border-radius:18px; background:var(--yk-surface); box-shadow:0 20px 55px rgba(15,23,42,.10); }
html[data-theme="dark"] .yk-searchbox { box-shadow:0 20px 55px rgba(0,0,0,.24); }
.yk-searchbox svg { width:21px; height:21px; color:var(--yk-faint); flex:0 0 auto; }
.yk-searchbox input { flex:1; min-width:0; min-height:48px !important; border:0 !important; background:transparent !important; box-shadow:none !important; font-size:15px !important; padding:0 4px !important; }
.yk-searchbox button { width:auto; min-height:42px; padding:0 13px; border:0; border-radius:11px; background:var(--yk-surface-muted); color:var(--yk-muted); cursor:pointer; font-size:12px; font-weight:750; }
.yk-search-hint { display:flex; justify-content:center; flex-wrap:wrap; gap:8px 16px; margin-top:13px; color:var(--yk-muted); font-size:11px; }
.yk-search-hint span { display:inline-flex; align-items:center; gap:5px; }
.yk-search-hint svg { width:14px; height:14px; color:var(--yk-success); }

.yk-section { margin-top: 36px; }
.yk-section-head { display:flex; justify-content:space-between; gap:20px; align-items:end; margin-bottom:15px; }
.yk-section-head h2 { margin:4px 0 0; color:var(--yk-ink); font-size:24px; line-height:1.25; letter-spacing:-.035em; }
.yk-section-head p { margin:0; max-width:450px; color:var(--yk-muted); font-size:12px; line-height:1.65; text-align:right; }
.yk-featured-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
.yk-tool-card {
  --card-accent: var(--yk-primary);
  position:relative;
  overflow:hidden;
  min-height:220px;
  padding:18px;
  display:flex;
  flex-direction:column;
  border:1px solid var(--yk-line);
  border-radius:var(--yk-radius-xl);
  background:var(--yk-surface);
  color:var(--yk-text);
  text-decoration:none;
  box-shadow:var(--yk-shadow-xs);
  transition:transform .2s var(--yk-ease), border-color .2s, box-shadow .2s;
}
.yk-tool-card::after { content:""; position:absolute; inset:auto -50px -80px auto; width:180px; height:180px; border-radius:50%; background:radial-gradient(circle,color-mix(in srgb,var(--card-accent) 10%,transparent),transparent 68%); pointer-events:none; }
.yk-tool-card:hover { transform:translateY(-3px); border-color:color-mix(in srgb,var(--card-accent) 24%,var(--yk-line)); box-shadow:var(--yk-shadow-md); }
.yk-tool-icon { width:44px; height:44px; display:grid; place-items:center; border-radius:13px; background:color-mix(in srgb,var(--card-accent) 9%,var(--yk-surface)); color:var(--card-accent); border:1px solid color-mix(in srgb,var(--card-accent) 12%,var(--yk-line)); }
.yk-tool-icon svg { width:23px; height:23px; fill:none; stroke:currentColor; stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; }
.yk-tool-card h3 { margin:16px 0 7px; color:var(--yk-ink); font-size:16px; line-height:1.35; font-weight:800; letter-spacing:-.02em; }
.yk-tool-card p { margin:0; color:var(--yk-muted); font-size:12px; line-height:1.7; flex:1; }
.yk-tool-card-foot { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-top:16px; color:var(--yk-primary); font-size:11px; font-weight:800; }
.yk-tool-card-foot svg { width:15px; height:15px; transition:transform .18s var(--yk-ease); }
.yk-tool-card:hover .yk-tool-card-foot svg { transform:translateX(2px); }
.yk-tool-card.is-featured { min-height:236px; }
.yk-tool-card[data-accent="blue"] { --card-accent:#2563eb; }
.yk-tool-card[data-accent="violet"] { --card-accent:#7c3aed; }
.yk-tool-card[data-accent="cyan"] { --card-accent:#0891b2; }
.yk-tool-card[data-accent="emerald"] { --card-accent:#059669; }

.yk-filterbar { display:flex; flex-wrap:wrap; gap:7px; margin:0 0 14px; padding:5px; width:max-content; max-width:100%; border:1px solid var(--yk-line); border-radius:14px; background:var(--yk-surface); box-shadow:var(--yk-shadow-xs); }
.yk-filterbar button { min-height:34px; padding:6px 11px; border:0; border-radius:9px; background:transparent; color:var(--yk-muted); cursor:pointer; font-size:11px; font-weight:750; }
.yk-filterbar button:hover { color:var(--yk-ink); background:var(--yk-surface-soft); }
.yk-filterbar button.is-active { color:#fff; background:var(--yk-ink); }
.yk-tools-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
.yk-tools-grid .yk-tool-card { min-height:208px; }
.yk-search-empty { margin:20px 0 0; padding:28px; border:1px dashed var(--yk-line); border-radius:var(--yk-radius-lg); text-align:center; color:var(--yk-muted); font-size:13px; background:var(--yk-surface-soft); }
.yk-recent { display:flex; justify-content:center; flex-wrap:wrap; gap:7px; margin-top:12px; }
.yk-recent a { padding:6px 9px; border:1px solid var(--yk-line); border-radius:999px; background:var(--yk-surface); color:var(--yk-muted); text-decoration:none; font-size:10px; font-weight:700; }
.yk-recent a:hover { color:var(--yk-primary); border-color:color-mix(in srgb,var(--yk-primary) 25%,var(--yk-line)); }

.yk-value-strip { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-top:24px; }
.yk-value-item { display:flex; gap:11px; align-items:flex-start; padding:14px; border:1px solid var(--yk-line); border-radius:var(--yk-radius-lg); background:color-mix(in srgb,var(--yk-surface) 70%,transparent); }
.yk-value-item svg { width:19px; height:19px; color:var(--yk-primary); flex:0 0 auto; margin-top:1px; }
.yk-value-item strong { display:block; color:var(--yk-ink); font-size:12px; }
.yk-value-item span { display:block; margin-top:2px; color:var(--yk-muted); font-size:10px; line-height:1.55; }
.yk-home-footer { width:min(var(--yk-page),calc(100% - 28px)); margin:0 auto; padding:28px 0 34px; border-top:1px solid var(--yk-line); color:var(--yk-muted); font-size:11px; }
.yk-home-footer-row { display:flex; justify-content:space-between; gap:20px; align-items:center; }
.yk-home-footer a { color:var(--yk-muted); text-decoration:none; }
.yk-home-footer a:hover { color:var(--yk-primary); }

/* ----------------------------- 404 ------------------------------------- */
.yk-error-page { min-height:100vh; display:grid; place-items:center; padding:24px; }
.yk-error-card { width:min(620px,100%); padding:38px; border:1px solid var(--yk-line); border-radius:24px; background:var(--yk-surface); box-shadow:var(--yk-shadow-md); text-align:center; }
.yk-error-code { font-size:72px; line-height:1; font-weight:900; letter-spacing:-.06em; background:linear-gradient(120deg,var(--yk-primary),var(--yk-accent)); -webkit-background-clip:text; color:transparent; }
.yk-error-card h1 { color:var(--yk-ink); margin:16px 0 8px; font-size:24px; }
.yk-error-card p { color:var(--yk-muted); font-size:13px; line-height:1.7; }
.yk-error-card a { display:inline-flex; align-items:center; justify-content:center; min-height:42px; margin-top:10px; padding:8px 15px; border-radius:12px; background:var(--yk-primary); color:#fff; text-decoration:none; font-size:13px; font-weight:750; }

/* ----------------------------- Motion ---------------------------------- */
@keyframes yk-fade { from{opacity:0} to{opacity:1} }
@keyframes yk-toast-in { from{opacity:0; transform:translateY(8px) scale(.98)} to{opacity:1; transform:none} }
.yk-reveal { animation: yk-reveal .44s var(--yk-ease) both; }
@keyframes yk-reveal { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:none} }

/* ----------------------------- Responsive ------------------------------ */
@media (max-width: 1060px) {
  .yk-featured-grid, .yk-tools-grid { grid-template-columns:repeat(3,minmax(0,1fr)); }
  .yk-related-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .yk-sitebar-nav { display:none; }
}
@media (max-width: 900px) {
  .yk-grid, .yk-tool-page-v3 .workspace-grid { grid-template-columns:1fr; }
  .yk-control-card, .yk-tool-page-v3 .controls-card, body.watermark-tool.yk-tool-page-v3 .controls { position:static; max-height:none; overflow:visible; }
  .yk-legacy-main > .container { flex-direction:column !important; }
  .yk-tool-page-v3 .settings-panel, .yk-tool-page-v3 .controls, .yk-tool-page-v3 .controls-panel { width:100% !important; flex-basis:auto !important; position:static; }
  body.watermark-tool.yk-tool-page-v3 .canvas-container { min-height:440px; }
  .summary-card { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .yk-featured-grid, .yk-tools-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .yk-value-strip { grid-template-columns:1fr; }
}
@media (max-width: 640px) {
  :root { --yk-radius-xl: 16px; --yk-radius-2xl: 18px; }
  .yk-sitebar { top:7px; width:calc(100% - 14px); margin-top:7px; min-height:56px; padding:7px 8px 7px 10px; border-radius:15px; }
  .yk-brand span { display:none; }
  .yk-command-btn span:not(.yk-keycap) { display:none; }
  .yk-command-btn .yk-keycap { display:none; }
  .yk-command-btn { width:40px !important; padding:0 !important; }
  .yk-container, .yk-home-main, .yk-related-tools, .yk-home-footer { width:calc(100% - 20px); }
  .yk-container { padding-top:14px; }
  .yk-hero { padding:21px 18px; margin-bottom:12px; }
  .yk-hero h1 { font-size:25px; }
  .yk-hero p { font-size:12.5px; line-height:1.72; }
  .yk-card { padding:16px; }
  .two-col, .two-cols, .field-row, .inline-row, .color-row, .preset-row, .yk-tool-page-v3 .converters, .yk-tool-page-v3 .converter-grid { grid-template-columns:1fr; }
  .yk-stat-grid { grid-template-columns:repeat(3,minmax(0,1fr)); }
  .yk-stat, .summary-card > div { padding:10px !important; }
  .yk-stat strong, .summary-card strong { font-size:15px; }
  .preview-card { grid-template-columns:1fr; }
  .yk-result-grid, .preview-grid, .frames-grid { grid-template-columns:1fr; }
  .yk-home-main { padding-top:16px; }
  .yk-home-hero { padding:42px 4px 24px; }
  .yk-home-hero h1 { font-size:clamp(34px,11vw,48px); }
  .yk-home-hero > p { font-size:13px; }
  .yk-searchbox { padding-left:12px; border-radius:15px; }
  .yk-searchbox button { display:none; }
  .yk-section { margin-top:30px; }
  .yk-section-head { align-items:start; }
  .yk-section-head h2 { font-size:21px; }
  .yk-section-head p { display:none; }
  .yk-featured-grid, .yk-tools-grid { grid-template-columns:1fr; gap:9px; }
  .yk-tool-card, .yk-tool-card.is-featured, .yk-tools-grid .yk-tool-card { min-height:0; padding:15px; display:grid; grid-template-columns:42px minmax(0,1fr) auto; grid-template-areas:"icon title foot" "icon desc foot"; gap:4px 12px; align-items:center; }
  .yk-tool-icon { grid-area:icon; width:42px; height:42px; }
  .yk-tool-card h3 { grid-area:title; margin:0; font-size:14px; }
  .yk-tool-card p { grid-area:desc; font-size:10.5px; line-height:1.5; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
  .yk-tool-card-foot { grid-area:foot; margin:0; }
  .yk-tool-card-foot span { display:none; }
  .yk-filterbar { width:100%; overflow-x:auto; flex-wrap:nowrap; scrollbar-width:none; }
  .yk-filterbar::-webkit-scrollbar { display:none; }
  .yk-filterbar button { white-space:nowrap; }
  .yk-related-grid { grid-template-columns:1fr; }
  .yk-related-head p { display:none; }
  .yk-home-footer-row { align-items:flex-start; flex-direction:column; }
  body.watermark-tool.yk-tool-page-v3 .canvas-container { min-height:330px; }
  .yk-command-mask { padding-top:8vh; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior:auto !important; animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; }
}

/* ----------------------------- Legacy editor refinements --------------- */
.yk-tool-page-v3 .controls,
.yk-tool-page-v3 .main-content,
.yk-tool-page-v3[data-tool="image-exif"] .left,
.yk-tool-page-v3[data-tool="image-exif"] .right {
  border: 1px solid var(--yk-line) !important;
  border-radius: var(--yk-radius-xl) !important;
  background: var(--yk-surface) !important;
  box-shadow: var(--yk-shadow-sm) !important;
}
.yk-legacy-main > .container,
.yk-legacy-main > .page-shell { height: auto !important; }
.yk-tool-page-v3 .panel { padding: 18px !important; }

.yk-tool-page-v3[data-tool="base64-coder"] .yk-legacy-main > .container { display:block !important; max-width:960px !important; margin:0 auto !important; }
.yk-tool-page-v3[data-tool="gif-tools"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-pdf"] .yk-legacy-main > .container { display:block !important; max-width:1080px !important; margin:0 auto !important; }
.yk-tool-page-v3[data-tool="image-converter"] .yk-legacy-main > .container { display:block !important; max-width:720px !important; margin:0 auto !important; }

.yk-tool-page-v3[data-tool="image-color-picker"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-cropper"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="id-photo"] .yk-legacy-main > .container { display:flex !important; }
.yk-tool-page-v3[data-tool="image-combiner"] .yk-legacy-main > .container,
.yk-tool-page-v3[data-tool="image-exif"] .yk-legacy-main > .container { display:grid !important; grid-template-columns:minmax(300px,var(--yk-control)) minmax(0,1fr); }
.yk-tool-page-v3[data-tool="image-combiner"] .controls { width:auto !important; }
.yk-tool-page-v3[data-tool="image-exif"] .left,
.yk-tool-page-v3[data-tool="image-exif"] .right { padding:20px !important; min-width:0; }

.yk-tool-page-v3[data-tool="image-color-picker"] .main-content,
.yk-tool-page-v3[data-tool="image-cropper"] .main-content {
  display:flex !important;
  align-items:center;
  justify-content:center;
  min-height:620px;
  padding:0 !important;
  overflow:hidden;
}
.yk-tool-page-v3[data-tool="image-color-picker"] .controls-panel,
.yk-tool-page-v3[data-tool="image-cropper"] .controls-panel { position:sticky; top:92px; align-self:start; }
.yk-tool-page-v3[data-tool="image-color-picker"] .canvas-wrapper { min-height:620px; }
.yk-tool-page-v3[data-tool="image-cropper"] .image-container { min-height:620px; }
.yk-tool-page-v3[data-tool="id-photo"] .preview-panel { padding:18px !important; }

/* Compact utility buttons inside dense editors */
.yk-tool-page-v3 .copy-btn,
.yk-tool-page-v3 .button-group button,
.yk-tool-page-v3 .preset-row button,
.yk-tool-page-v3 .view-controls button {
  min-height:36px !important;
  padding:7px 10px !important;
  border-color:var(--yk-line) !important;
  background:var(--yk-surface-soft) !important;
  color:var(--yk-text) !important;
  box-shadow:var(--yk-shadow-xs) !important;
}
.yk-tool-page-v3 .copy-btn:hover,
.yk-tool-page-v3 .button-group button:hover,
.yk-tool-page-v3 .preset-row button:hover,
.yk-tool-page-v3 .view-controls button:hover { background:var(--yk-surface-muted) !important; box-shadow:var(--yk-shadow-xs) !important; }

@media (max-width:900px){
  .yk-tool-page-v3[data-tool="image-color-picker"] .yk-legacy-main > .container,
  .yk-tool-page-v3[data-tool="image-cropper"] .yk-legacy-main > .container,
  .yk-tool-page-v3[data-tool="id-photo"] .yk-legacy-main > .container { flex-direction:column !important; }
  .yk-tool-page-v3[data-tool="image-combiner"] .yk-legacy-main > .container,
  .yk-tool-page-v3[data-tool="image-exif"] .yk-legacy-main > .container { grid-template-columns:1fr !important; }
  .yk-tool-page-v3[data-tool="image-color-picker"] .controls-panel,
  .yk-tool-page-v3[data-tool="image-cropper"] .controls-panel { position:static; }
  .yk-tool-page-v3[data-tool="image-color-picker"] .main-content,
  .yk-tool-page-v3[data-tool="image-cropper"] .main-content,
  .yk-tool-page-v3[data-tool="image-color-picker"] .canvas-wrapper,
  .yk-tool-page-v3[data-tool="image-cropper"] .image-container { min-height:480px; }
}

/* ========================================================================
   V3.1 Product layer: favorites, intent search, workflow handoff
   ======================================================================== */
.yk-favorite-toggle {
  position:absolute;
  top:13px;
  right:13px;
  z-index:3;
  width:32px;
  height:32px;
  display:grid;
  place-items:center;
  border:1px solid var(--yk-line);
  border-radius:10px;
  background:color-mix(in srgb,var(--yk-surface) 92%,transparent);
  color:var(--yk-faint);
  box-shadow:var(--yk-shadow-xs);
  cursor:pointer;
  opacity:.72;
  transition:transform .18s var(--yk-ease), color .18s, background .18s, opacity .18s, border-color .18s;
}
.yk-favorite-toggle svg { width:16px; height:16px; fill:transparent; stroke:currentColor; transition:fill .18s; }
.yk-tool-card:hover .yk-favorite-toggle, .yk-favorite-toggle:focus-visible, .yk-favorite-toggle.is-active { opacity:1; }
.yk-favorite-toggle:hover { transform:translateY(-1px) scale(1.03); color:var(--yk-warning); border-color:color-mix(in srgb,var(--yk-warning) 25%,var(--yk-line)); }
.yk-favorite-toggle.is-active { color:#d97706; background:color-mix(in srgb,#f59e0b 9%,var(--yk-surface)); border-color:color-mix(in srgb,#f59e0b 24%,var(--yk-line)); }
.yk-favorite-toggle.is-active svg, .yk-favorite-current.is-active svg { fill:currentColor; }
.yk-favorite-current.is-active { color:#d97706 !important; border-color:color-mix(in srgb,#f59e0b 24%,var(--yk-line)) !important; background:color-mix(in srgb,#f59e0b 8%,var(--yk-surface)) !important; }

.yk-personal-section[hidden] { display:none !important; }
.yk-personal-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px; }
.yk-personal-card {
  min-width:0;
  display:grid;
  grid-template-columns:36px minmax(0,1fr) 20px;
  gap:10px;
  align-items:center;
  padding:13px;
  border:1px solid var(--yk-line);
  border-radius:var(--yk-radius-lg);
  background:var(--yk-surface);
  color:var(--yk-text);
  text-decoration:none;
  box-shadow:var(--yk-shadow-xs);
  transition:transform .18s var(--yk-ease), border-color .18s, box-shadow .18s;
}
.yk-personal-card:hover { transform:translateY(-2px); border-color:color-mix(in srgb,var(--yk-primary) 24%,var(--yk-line)); box-shadow:var(--yk-shadow-sm); }
.yk-personal-icon { width:36px; height:36px; display:grid; place-items:center; border-radius:11px; background:color-mix(in srgb,#f59e0b 9%,var(--yk-surface)); color:#d97706; }
.yk-personal-icon svg { width:17px; height:17px; fill:currentColor; }
.yk-personal-copy { min-width:0; display:block; }
.yk-personal-copy strong, .yk-personal-copy small { display:block; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.yk-personal-copy strong { color:var(--yk-ink); font-size:12px; }
.yk-personal-copy small { margin-top:3px; color:var(--yk-muted); font-size:9.5px; }
.yk-personal-arrow { color:var(--yk-faint); font-size:14px; }

.yk-command-results a span { display:flex; align-items:center; gap:7px; min-width:0; }
.yk-command-results a em { flex:0 0 auto; padding:2px 5px; border-radius:999px; background:color-mix(in srgb,#f59e0b 10%,var(--yk-surface)); color:#d97706; font-size:8px; font-style:normal; font-weight:800; }
.yk-command-tip { padding:9px 14px 11px; border-top:1px solid var(--yk-line); color:var(--yk-faint); font-size:9.5px; text-align:center; }

.yk-local-note {
  display:flex;
  align-items:flex-start;
  gap:9px;
  padding:11px 12px;
  border:1px solid color-mix(in srgb,var(--yk-success) 18%,var(--yk-line));
  border-radius:12px;
  background:var(--yk-success-soft);
  color:var(--yk-muted);
  font-size:11px;
  line-height:1.6;
}
.yk-local-note strong { display:block; color:var(--yk-success); font-size:11px; }
.yk-local-note svg { width:17px; height:17px; flex:0 0 auto; color:var(--yk-success); margin-top:1px; }

.yk-workflow-actions { display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
.yk-workflow-actions button { flex:1 1 120px; }

@media (max-width: 980px) {
  .yk-personal-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media (max-width: 640px) {
  .yk-favorite-toggle { top:10px; right:42px; width:30px; height:30px; }
  .yk-personal-grid { grid-template-columns:1fr; }
  .yk-personal-card { padding:11px 12px; }
  .yk-favorite-current { display:inline-flex !important; }
}