/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg: #f7f8fa;
  --bg-elevated: #ffffff;
  --bg-muted: #eef0f4;
  --text: #14181f;
  --text-muted: #565f6e;
  --border: #dfe3e9;
  --border-strong: #c4cad4;
  --accent: #2f6fed;
  --accent-hover: #2559c4;
  --accent-contrast: #ffffff;
  --accent-soft: #e8f0fe;
  --success: #16a34a;
  --success-soft: #e8f8ee;
  --danger: #dc2626;
  --danger-soft: #fdecec;
  --warning: #b45309;
  --warning-soft: #fef3e0;
  --shadow-sm: 0 1px 2px rgba(20, 24, 31, 0.06);
  --shadow-md: 0 4px 16px rgba(20, 24, 31, 0.08);
  --shadow-lg: 0 12px 32px rgba(20, 24, 31, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --container: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1216;
    --bg-elevated: #171b21;
    --bg-muted: #1d222a;
    --text: #eef1f5;
    --text-muted: #a1acb9;
    --border: #2b323c;
    --border-strong: #3a4350;
    --accent: #5b8def;
    --accent-hover: #7ba1f2;
    --accent-contrast: #0b1220;
    --accent-soft: #16233d;
    --success: #4ade80;
    --success-soft: #10261a;
    --danger: #f87171;
    --danger-soft: #2c1616;
    --warning: #fbbf24;
    --warning-soft: #2c2210;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  }
}
:root[data-theme="dark"] {
  --bg: #0f1216;
  --bg-elevated: #171b21;
  --bg-muted: #1d222a;
  --text: #eef1f5;
  --text-muted: #a1acb9;
  --border: #2b323c;
  --border-strong: #3a4350;
  --accent: #5b8def;
  --accent-hover: #7ba1f2;
  --accent-contrast: #0b1220;
  --accent-soft: #16233d;
  --success: #4ade80;
  --success-soft: #10261a;
  --danger: #f87171;
  --danger-soft: #2c1616;
  --warning: #fbbf24;
  --warning-soft: #2c2210;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; overflow-x: clip; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; letter-spacing: -0.01em; font-weight: 700; }
ul, ol { padding-left: 1.25em; }
::selection { background: var(--accent); color: var(--accent-contrast); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: var(--container); margin-inline: auto; padding-inline: 1.25rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--accent); color: var(--accent-contrast);
  z-index: 9999; border-radius: 8px; font-weight: 600; transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }
.section { padding-block: 2.5rem; }
.section-narrow { max-width: 760px; margin-inline: auto; }
.muted { color: var(--text-muted); }
.center { text-align: center; }
[hidden] { display: none !important; }

/* =============================================================
   4. Typography
   ============================================================= */
h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.8rem); margin-block: 0 1rem; }
h3 { font-size: 1.1rem; margin-block: 0 .5rem; }
.eyebrow { font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.lede { font-size: 1.1rem; color: var(--text-muted); max-width: 60ch; }
main .prose a, main .faq-item a, main p a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
main .prose a:hover, main .faq-item a:hover, main p a:hover { color: var(--accent-hover); }

/* =============================================================
   5. Components
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .75rem 1.4rem; border-radius: var(--radius-sm); font-weight: 600; font-size: .95rem;
  transition: transform .15s var(--ease-out), background .15s var(--ease-out), box-shadow .15s var(--ease-out);
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: var(--accent-contrast); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--bg-muted); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--border-strong); }
.btn-lg { padding: 1rem 1.8rem; font-size: 1.05rem; width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.card {
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* Header / nav */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 1.25rem; padding-block: .85rem; }
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 800; font-size: 1.15rem; margin-right: auto; }
.brand svg { width: 26px; height: 26px; flex-shrink: 0; }
.nav-links { display: none; gap: 1.25rem; align-items: center; }
.nav-links a { font-weight: 600; font-size: .92rem; color: var(--text-muted); }
.nav-links a:hover { color: var(--text); }
.nav-search { display: none; }
.nav-toggle { display: inline-flex; padding: .4rem; border-radius: 8px; }
.nav-toggle:hover { background: var(--bg-muted); }
.nav-mobile { display: none; flex-direction: column; gap: .25rem; padding: 0 0 1rem; border-top: 1px solid var(--border); }
.nav-mobile.is-open { display: flex; }
.nav-mobile a { padding: .6rem .25rem; font-weight: 600; color: var(--text); border-bottom: 1px solid var(--border); }
@media (min-width: 720px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
  .nav-search { display: flex; }
}

/* Breadcrumbs */
.breadcrumbs { font-size: .85rem; color: var(--text-muted); padding-block: 1rem 0; }
.breadcrumbs a { color: var(--text-muted); text-decoration: underline; text-underline-offset: 2px; }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs .sep { margin-inline: .4rem; opacity: .6; }

/* Search box (site-wide) */
.search-box { position: relative; }
.search-box input {
  width: 220px; padding: .55rem .9rem .55rem 2.1rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg-muted); color: var(--text); font-size: .88rem;
}
.search-box svg { position: absolute; left: .7rem; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--text-muted); }
.search-box input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

/* Hero (homepage) */
.hero { padding-block: 3.5rem 2.5rem; text-align: center; }
.hero h1 { max-width: 22ch; margin-inline: auto; }
.hero .lede { margin-inline: auto; margin-top: .75rem; }
.hero-search { max-width: 520px; margin: 1.75rem auto 0; position: relative; }
.hero-search input {
  width: 100%; padding: 1rem 1.2rem 1rem 3rem; border-radius: 999px; border: 1px solid var(--border);
  background: var(--bg-elevated); color: var(--text); font-size: 1rem; box-shadow: var(--shadow-md);
}
.hero-search svg { position: absolute; left: 1.1rem; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; color: var(--text-muted); }
.hero-stats { display: flex; justify-content: center; gap: 2rem; margin-top: 1.5rem; flex-wrap: wrap; }
.hero-stats div { font-size: .85rem; color: var(--text-muted); }
.hero-stats strong { display: block; font-size: 1.3rem; color: var(--text); }

/* Category nav pills */
.category-pills { display: flex; gap: .6rem; flex-wrap: wrap; justify-content: center; margin-top: 1.5rem; }
.category-pill {
  display: inline-flex; align-items: center; gap: .4rem; padding: .5rem 1rem; border-radius: 999px;
  background: var(--bg-muted); border: 1px solid var(--border); font-weight: 600; font-size: .88rem;
}
.category-pill:hover { border-color: var(--accent); color: var(--accent); }
.category-pill svg { width: 16px; height: 16px; }

/* Tool grid & cards */
.tools-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; margin-top: 1.5rem;
}
.tool-tile {
  display: flex; flex-direction: column; gap: .6rem; padding: 1.25rem; border-radius: var(--radius-md);
  background: var(--bg-elevated); border: 1px solid var(--border); transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out), border-color .18s var(--ease-out);
}
.tool-tile:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.tool-tile .tool-icon {
  width: 42px; height: 42px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft); color: var(--accent); flex-shrink: 0;
}
.tool-tile .tool-icon svg { width: 22px; height: 22px; }
.tool-tile h3 { font-size: 1rem; }
.tool-tile p { font-size: .87rem; color: var(--text-muted); }
.tool-tile-badge {
  align-self: flex-start; font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
  padding: .15rem .5rem; border-radius: 999px; background: var(--success-soft); color: var(--success);
}

.category-section h2 { display: flex; align-items: center; gap: .6rem; }
.category-section h2 svg { width: 24px; height: 24px; color: var(--accent); }
.category-section > p.muted { margin-top: -.5rem; margin-bottom: 1rem; }

/* Tool page hero */
.tool-hero { padding-block: 1.75rem 0; }
.tool-hero h1 { max-width: none; text-align: left; margin-inline: 0; }
.tool-hero .lede { margin-inline: 0; }

/* Tool card (the functional widget) */
.tool-card {
  margin-block: 1.5rem; padding: 1.5rem; border-radius: var(--radius-lg); background: var(--bg-elevated);
  border: 1px solid var(--border); box-shadow: var(--shadow-md);
}
.tool-drop {
  border: 2px dashed var(--border-strong); border-radius: var(--radius-md); padding: 2.25rem 1.25rem;
  text-align: center; transition: border-color .15s var(--ease-out), background .15s var(--ease-out); cursor: pointer;
  display: block;
}
.tool-drop:hover, .tool-drop.is-dragover { border-color: var(--accent); background: var(--accent-soft); }
.tool-drop svg { width: 40px; height: 40px; margin-inline: auto; color: var(--accent); margin-bottom: .75rem; }
.tool-drop-text { font-weight: 600; }
.tool-drop-hint { display: block; font-size: .82rem; color: var(--text-muted); margin-top: .35rem; }
.tool-drop input[type="file"] { position: absolute; width: 1px; height: 1px; overflow: hidden; opacity: 0; }

.tool-filelist { display: flex; flex-direction: column; gap: .5rem; margin-top: 1rem; }
.tool-file-row {
  display: flex; align-items: center; gap: .75rem; padding: .6rem .8rem; border-radius: var(--radius-sm);
  background: var(--bg-muted); border: 1px solid var(--border); font-size: .88rem;
}
.tool-file-row .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.tool-file-row .size { color: var(--text-muted); font-size: .82rem; }
.tool-file-row button { color: var(--text-muted); padding: .2rem; border-radius: 6px; }
.tool-file-row button:hover { color: var(--danger); background: var(--danger-soft); }
.tool-file-row .thumb { width: 34px; height: 34px; border-radius: 6px; object-fit: cover; background: var(--bg); flex-shrink: 0; }
.tool-file-row.is-draggable { cursor: grab; }

.tool-options { display: grid; gap: 1rem; margin-top: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 540px) { .tool-options.cols-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 720px) { .tool-options.cols-3 { grid-template-columns: 1fr 1fr 1fr; } }
.field { display: flex; flex-direction: column; gap: .4rem; }
.field label { font-size: .85rem; font-weight: 600; }
.field .hint { font-size: .78rem; color: var(--text-muted); }
.field input[type="text"], .field input[type="number"], .field input[type="password"],
.field input[type="email"], .field input[type="url"], .field select, .field textarea {
  padding: .6rem .8rem; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font: inherit; font-size: .92rem; width: 100%;
}
.field textarea { resize: vertical; min-height: 120px; font-family: var(--mono); }
.field input[type="range"] { width: 100%; accent-color: var(--accent); }
.field-row { display: flex; align-items: center; justify-content: space-between; gap: .5rem; }
.radio-group, .check-group { display: flex; gap: .6rem; flex-wrap: wrap; }
.radio-pill { display: inline-flex; }
.radio-pill input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.radio-pill span {
  display: inline-flex; align-items: center; gap: .4rem; padding: .5rem .9rem; border-radius: 999px;
  border: 1px solid var(--border); font-size: .85rem; font-weight: 600; background: var(--bg-muted);
}
.radio-pill input:checked + span { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.radio-pill input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.checkbox-row { display: flex; align-items: center; gap: .5rem; font-size: .9rem; }
.checkbox-row input { width: 18px; height: 18px; accent-color: var(--accent); }
.swatch-input { display: flex; align-items: center; gap: .6rem; }
.swatch-input input[type="color"] { width: 44px; height: 40px; border-radius: 8px; border: 1px solid var(--border); padding: 2px; background: var(--bg); }

.tool-actions { display: flex; gap: .75rem; margin-top: 1.25rem; flex-wrap: wrap; }
.tool-actions .btn { flex: 1 1 auto; min-width: 160px; }

.tool-progress { margin-top: 1.25rem; }
.progress-bar { height: 8px; border-radius: 999px; background: var(--bg-muted); overflow: hidden; }
.progress-bar > span { display: block; height: 100%; background: var(--accent); border-radius: 999px; transition: width .2s var(--ease-out); width: 0%; }
.progress-label { font-size: .85rem; color: var(--text-muted); margin-top: .5rem; text-align: center; }

.tool-result { margin-top: 1.25rem; padding: 1.25rem; border-radius: var(--radius-md); background: var(--success-soft); border: 1px solid color-mix(in srgb, var(--success) 30%, var(--border)); }
.tool-result-head { display: flex; align-items: center; gap: .6rem; font-weight: 700; color: var(--success); margin-bottom: .75rem; }
.tool-result-head svg { width: 20px; height: 20px; }
.tool-result .stat-row { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1rem; font-size: .88rem; }
.tool-result .stat-row strong { display: block; font-size: 1.1rem; color: var(--text); }
.tool-result .savings { color: var(--success); font-weight: 700; }
.tool-result .preview-compare { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-bottom: 1rem; }
.tool-result .preview-compare img, .tool-result .preview-compare canvas { border-radius: var(--radius-sm); border: 1px solid var(--border); width: 100%; }
.tool-result .preview-compare figcaption { font-size: .78rem; color: var(--text-muted); margin-top: .3rem; text-align: center; }
.result-actions { display: flex; gap: .6rem; flex-wrap: wrap; }
.reset-link { margin-top: .9rem; font-size: .85rem; }

.tool-error { margin-top: 1.25rem; padding: 1rem 1.2rem; border-radius: var(--radius-md); background: var(--danger-soft); border: 1px solid color-mix(in srgb, var(--danger) 30%, var(--border)); color: var(--danger); font-size: .92rem; }
.tool-error strong { display: block; margin-bottom: .2rem; }

.tool-warning { margin-top: 1rem; padding: .85rem 1rem; border-radius: var(--radius-sm); background: var(--warning-soft); border: 1px solid color-mix(in srgb, var(--warning) 35%, var(--border)); color: var(--warning); font-size: .85rem; }

.tool-card[data-state="unsupported"] .tool-drop,
.tool-card[data-state="unsupported"] .tool-options,
.tool-card[data-state="unsupported"] .tool-actions { opacity: .45; pointer-events: none; }

.privacy-badge {
  display: inline-flex; align-items: center; gap: .5rem; margin-top: 1rem; padding: .55rem .9rem;
  border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: .82rem; font-weight: 600;
}
.privacy-badge svg { width: 16px; height: 16px; flex-shrink: 0; }
.tool-limits { font-size: .8rem; color: var(--text-muted); margin-top: .6rem; }

.noscript-note { padding: 1rem 1.25rem; border-radius: var(--radius-md); background: var(--warning-soft); color: var(--warning); border: 1px solid var(--border); margin-block: 1.5rem; font-size: .9rem; }

/* Ad slots */
.ad-slot {
  min-height: 100px; display: flex; align-items: center; justify-content: center;
  border: 1px dashed var(--border-strong); border-radius: var(--radius-sm); color: var(--text-muted);
  font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  background: var(--bg-muted); margin-block: 2rem;
}
.ad-slot.ad-slot-lg { min-height: 250px; }

/* How-to steps */
.steps { display: grid; gap: 1.25rem; grid-template-columns: 1fr; margin-top: 1rem; }
@media (min-width: 720px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step { display: flex; flex-direction: column; gap: .5rem; }
.step-num {
  width: 32px; height: 32px; border-radius: 999px; background: var(--accent); color: var(--accent-contrast);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .95rem;
}

/* Benefits list */
.benefits-list { list-style: none; padding: 0; display: grid; gap: .75rem; margin-top: 1rem; }
.benefits-list li { display: flex; gap: .65rem; align-items: flex-start; }
.benefits-list svg { width: 20px; height: 20px; color: var(--success); flex-shrink: 0; margin-top: .1rem; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: .6rem; margin-top: 1rem; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-elevated); overflow: hidden; }
.faq-item summary {
  padding: .95rem 1.1rem; font-weight: 600; cursor: pointer; list-style: none; display: flex;
  align-items: center; justify-content: space-between; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--text-muted); flex-shrink: 0; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { padding: 0 1.1rem 1rem; color: var(--text-muted); font-size: .92rem; }

/* Related tools */
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: .9rem; margin-top: 1rem; }
.related-card {
  padding: 1rem; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--bg-elevated);
  font-weight: 600; font-size: .9rem; display: flex; align-items: center; gap: .6rem;
}
.related-card:hover { border-color: var(--accent); color: var(--accent); }
.related-card svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 3rem; background: var(--bg-elevated); }
.footer-grid { display: grid; gap: 2rem; grid-template-columns: 1fr; padding-block: 2.5rem; }
@media (min-width: 720px) { .footer-grid { grid-template-columns: 2fr repeat(3, 1fr); } }
.footer-brand { display: flex; align-items: center; gap: .5rem; font-weight: 800; margin-bottom: .5rem; }
.footer-brand svg { width: 22px; height: 22px; }
.footer-col h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); margin-bottom: .8rem; }
.footer-col ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: .55rem; }
.footer-col a { font-size: .9rem; color: var(--text-muted); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border); padding-block: 1.25rem; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: .75rem; font-size: .82rem; color: var(--text-muted);
}
.footer-bottom-links { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Static / legal pages */
.prose { max-width: 760px; }
.prose h2 { margin-top: 2rem; }
.prose ul { margin-top: .5rem; }
.prose p, .prose li { color: var(--text-muted); }
.prose p { margin-bottom: 1rem; }

/* Page-not-found */
.error-page { text-align: center; padding-block: 5rem; }
.error-page .code { font-size: 5rem; font-weight: 800; color: var(--accent); }

/* Contact form (no real backend — mailto assist) */
.contact-form { display: grid; gap: 1rem; max-width: 520px; }

/* Responsive breakpoints reference kept minimal per convention */
@media (min-width: 540px)  { .tools-grid { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); } }
@media (min-width: 1280px) { .container { padding-inline: 1.5rem; } }

/* Reduced motion: only intrusive effects */
@media (prefers-reduced-motion: reduce) {
  .tool-tile, .btn-primary { transition: none; }
}