/* =========================================================================
   SnapTools — shared design system
   One stylesheet for the whole site. Cobalt + cool-slate brand.
   Light / dark via tokens. System fonts for fast load.
   ========================================================================= */

:root {
  color-scheme: light dark;

  --bg: #EFF2F7;
  --surface: #FFFFFF;
  --surface-2: #E7ECF3;
  --ink: #16202E;
  --ink-soft: #43566C;
  --muted: #74839A;
  --line: #D7DFE9;
  --line-soft: #E8ECF2;

  --accent: #1657D8;
  --accent-ink: #0E3E9E;
  --accent-tint: #E4ECFB;
  --accent-contrast: #FFFFFF;

  --good: #0B815A;
  --good-tint: #DCF0E7;
  --warn: #B07207;
  --warn-tint: #F6EAD3;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(22,32,46,.05), 0 8px 24px rgba(22,32,46,.07);
  --shadow-lg: 0 8px 40px rgba(22,32,46,.14);
  --maxw: 1080px;

  --sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Code", "SF Mono", Consolas, "Roboto Mono", ui-monospace, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B111B;
    --surface: #121C2A;
    --surface-2: #1A2637;
    --ink: #E9EFF7;
    --ink-soft: #AEBCCD;
    --muted: #6F8296;
    --line: #26364B;
    --line-soft: #1D2A3B;
    --accent: #5A93FF;
    --accent-ink: #9CBEFF;
    --accent-tint: #16233A;
    --accent-contrast: #08101D;
    --good: #33C68C;
    --good-tint: #10281F;
    --warn: #E0A945;
    --warn-tint: #2A2113;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
    --shadow-lg: 0 12px 48px rgba(0,0,0,.5);
  }
}

:root[data-theme="light"] {
  --bg: #EFF2F7; --surface: #FFFFFF; --surface-2: #E7ECF3;
  --ink: #16202E; --ink-soft: #43566C; --muted: #74839A;
  --line: #D7DFE9; --line-soft: #E8ECF2;
  --accent: #1657D8; --accent-ink: #0E3E9E; --accent-tint: #E4ECFB; --accent-contrast: #FFFFFF;
  --good: #0B815A; --good-tint: #DCF0E7; --warn: #B07207; --warn-tint: #F6EAD3;
  --shadow: 0 1px 2px rgba(22,32,46,.05), 0 8px 24px rgba(22,32,46,.07);
  --shadow-lg: 0 8px 40px rgba(22,32,46,.14);
}
:root[data-theme="dark"] {
  --bg: #0B111B; --surface: #121C2A; --surface-2: #1A2637;
  --ink: #E9EFF7; --ink-soft: #AEBCCD; --muted: #6F8296;
  --line: #26364B; --line-soft: #1D2A3B;
  --accent: #5A93FF; --accent-ink: #9CBEFF; --accent-tint: #16233A; --accent-contrast: #08101D;
  --good: #33C68C; --good-tint: #10281F; --warn: #E0A945; --warn-tint: #2A2113;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
  --shadow-lg: 0 12px 48px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

a { color: var(--accent-ink); text-underline-offset: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; gap: 16px; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; letter-spacing: -.02em; color: var(--ink); text-decoration: none; }
.logo .mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-ink));
  display: grid; place-items: center; color: #fff; font-size: 16px;
  box-shadow: 0 0 0 4px var(--accent-tint);
}
.header-nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.header-nav a { font-size: 14px; font-weight: 600; color: var(--ink-soft); text-decoration: none; padding: 7px 12px; border-radius: 8px; }
.header-nav a:hover { background: var(--surface-2); color: var(--ink); }
.theme-toggle {
  width: 38px; height: 38px; border-radius: 9px; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink-soft); cursor: pointer;
  display: grid; place-items: center; font-size: 17px; transition: background .15s, color .15s;
}
.theme-toggle:hover { background: var(--surface-2); color: var(--ink); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-size: 14.5px; font-weight: 700; line-height: 1;
  padding: 11px 18px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink); cursor: pointer;
  text-decoration: none; transition: transform .08s, background .15s, border-color .15s, box-shadow .15s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-contrast); border-color: transparent; box-shadow: 0 2px 12px color-mix(in srgb, var(--accent) 35%, transparent); }
.btn-primary:hover { background: var(--accent-ink); }
.btn-ghost { background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-sm { padding: 8px 13px; font-size: 13px; border-radius: 8px; }

/* ---------- Home: hero ---------- */
main { flex: 1 0 auto; }
.hero { text-align: center; padding: 56px 0 28px; }
.hero .eyebrow { font-size: 12.5px; text-transform: uppercase; letter-spacing: .14em; color: var(--accent-ink); font-weight: 700; margin-bottom: 14px; }
.hero h1 { font-size: clamp(30px, 5.5vw, 48px); line-height: 1.05; letter-spacing: -.03em; margin: 0 auto 14px; font-weight: 800; max-width: 16ch; text-wrap: balance; }
.hero p.tagline { font-size: clamp(16px, 2.2vw, 19px); color: var(--ink-soft); max-width: 54ch; margin: 0 auto; }
.trust-row { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 22px; }
.trust { font-size: 12.5px; font-weight: 600; color: var(--ink-soft); background: var(--surface); border: 1px solid var(--line); padding: 6px 12px; border-radius: 999px; display: inline-flex; align-items: center; gap: 6px; }
.trust svg { width: 14px; height: 14px; color: var(--good); }

/* ---------- Search ---------- */
.search-wrap { max-width: 560px; margin: 28px auto 0; position: relative; }
.search-wrap svg.si { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 19px; height: 19px; color: var(--muted); pointer-events: none; }
#toolSearch {
  width: 100%; font-family: inherit; font-size: 16px; color: var(--ink);
  padding: 15px 18px 15px 46px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--surface); box-shadow: var(--shadow); transition: border-color .15s, box-shadow .15s;
}
#toolSearch::placeholder { color: var(--muted); }
#toolSearch:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-tint); }

/* ---------- Tool grid ---------- */
.cat-block { padding: 12px 0 8px; }
.cat-head { display: flex; align-items: center; gap: 10px; margin: 30px 0 14px; }
.cat-head h2 { font-size: 15px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 700; margin: 0; }
.cat-head .rule { flex: 1; height: 1px; background: var(--line-soft); }
.cat-head .count { font-size: 12.5px; color: var(--muted); font-weight: 600; }

.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.tool-card {
  display: flex; flex-direction: column; gap: 8px; text-decoration: none;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); transition: transform .12s, box-shadow .15s, border-color .15s;
}
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.tool-card .ic { width: 42px; height: 42px; border-radius: 11px; background: var(--accent-tint); color: var(--accent-ink); display: grid; place-items: center; margin-bottom: 4px; }
.tool-card .ic svg { width: 22px; height: 22px; }
.tool-card h3 { margin: 0; font-size: 16px; font-weight: 700; letter-spacing: -.01em; color: var(--ink); }
.tool-card p { margin: 0; font-size: 13.5px; color: var(--ink-soft); line-height: 1.5; }
.no-results { text-align: center; color: var(--muted); padding: 40px 0; font-size: 15px; }

/* ---------- Tool page ---------- */
.breadcrumb { font-size: 13px; color: var(--muted); padding: 22px 0 0; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); text-decoration: underline; }
.tool-head { padding: 14px 0 8px; }
.tool-head h1 { font-size: clamp(26px, 4vw, 34px); letter-spacing: -.025em; margin: 0 0 8px; font-weight: 800; text-wrap: balance; }
.tool-head p.sub { font-size: 16px; color: var(--ink-soft); margin: 0; max-width: 62ch; }

.tool-app { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; margin: 22px 0; }

/* Dropzone */
.dropzone {
  border: 2px dashed var(--line); border-radius: var(--radius); background: var(--bg);
  padding: 44px 24px; text-align: center; cursor: pointer; transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: var(--accent-tint); }
.dropzone .dz-ic { width: 52px; height: 52px; margin: 0 auto 12px; color: var(--accent); }
.dropzone .dz-ic svg { width: 100%; height: 100%; }
.dropzone h3 { margin: 0 0 6px; font-size: 17px; font-weight: 700; }
.dropzone p { margin: 0; font-size: 13.5px; color: var(--muted); }
.dropzone .browse { color: var(--accent-ink); font-weight: 700; text-decoration: underline; }

/* Controls */
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; margin-top: 20px; padding: 16px 18px; background: var(--bg); border: 1px solid var(--line-soft); border-radius: var(--radius-sm); }
.control { display: flex; flex-direction: column; gap: 6px; }
.control label { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.control .row { display: flex; align-items: center; gap: 10px; }
input[type="range"] { accent-color: var(--accent); width: 180px; }
select, input[type="number"] {
  font-family: inherit; font-size: 14px; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 11px;
}
select:focus, input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-tint); }
.val-badge { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--accent-ink); min-width: 46px; }
.controls .spacer { flex: 1; }

/* Result list */
.results { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.file-row { display: grid; grid-template-columns: 56px 1fr auto; gap: 14px; align-items: center; padding: 12px 14px; background: var(--bg); border: 1px solid var(--line-soft); border-radius: var(--radius-sm); }
.file-row .thumb { width: 56px; height: 56px; border-radius: 8px; object-fit: cover; background: var(--surface-2); border: 1px solid var(--line); }
.file-row .fi { min-width: 0; }
.file-row .fi .name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-row .fi .stat { font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums; margin-top: 3px; }
.file-row .fi .stat .save { color: var(--good); font-weight: 700; }
.file-row .fi .stat .arrow { margin: 0 5px; opacity: .6; }
.file-actions { display: flex; gap: 8px; align-items: center; }
.results-bar { display: flex; align-items: center; gap: 12px; margin-top: 18px; flex-wrap: wrap; }
.results-bar .summary { font-size: 13.5px; color: var(--ink-soft); }
.results-bar .summary b { color: var(--good); }
.results-bar .spacer { flex: 1; }
.spin { display: inline-block; width: 15px; height: 15px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; vertical-align: -2px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Content sections (SEO / AdSense) */
.content { padding: 8px 0 10px; }
.content h2 { font-size: 22px; letter-spacing: -.02em; margin: 34px 0 12px; font-weight: 800; }
.content h3 { font-size: 17px; margin: 22px 0 8px; font-weight: 700; }
.content p { color: var(--ink-soft); max-width: 72ch; margin: 0 0 14px; }
.content ul { color: var(--ink-soft); max-width: 72ch; padding-left: 20px; }
.content li { margin: 6px 0; }
.steps-num { counter-reset: s; list-style: none; padding: 0; max-width: 72ch; }
.steps-num li { counter-increment: s; position: relative; padding: 4px 0 4px 40px; margin: 10px 0; color: var(--ink-soft); }
.steps-num li::before { content: counter(s); position: absolute; left: 0; top: 2px; width: 26px; height: 26px; background: var(--accent-tint); color: var(--accent-ink); border-radius: 7px; display: grid; place-items: center; font-weight: 800; font-size: 13px; }
.faq details { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 2px 16px; margin: 10px 0; background: var(--surface); }
.faq summary { cursor: pointer; font-weight: 700; padding: 13px 0; font-size: 15px; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-size: 20px; font-weight: 400; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { padding: 0 0 14px; margin: 0; }

/* Related tools */
.related { margin: 10px 0 0; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 12px; }

/* ---------- Footer ---------- */
.site-footer { flex-shrink: 0; border-top: 1px solid var(--line); background: var(--surface); margin-top: 50px; }
.site-footer .container { padding-top: 30px; padding-bottom: 34px; }
.footer-top { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; }
.footer-brand { max-width: 300px; }
.footer-brand .logo { margin-bottom: 8px; }
.footer-brand p { font-size: 13.5px; color: var(--muted); margin: 0; }
.footer-links { display: flex; gap: 40px; flex-wrap: wrap; }
.footer-col h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 10px; }
.footer-col a { display: block; font-size: 13.5px; color: var(--ink-soft); text-decoration: none; padding: 4px 0; }
.footer-col a:hover { color: var(--accent-ink); }
.footer-bottom { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--line-soft); font-size: 12.5px; color: var(--muted); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- Text / developer tools ---------- */
.tta { width: 100%; min-height: 190px; resize: vertical; font-family: var(--sans); font-size: 15px; line-height: 1.6; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px; }
.tta:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-tint); }
.tta.mono { font-family: var(--mono); font-size: 13.5px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(116px, 1fr)); gap: 12px; margin: 18px 0 6px; }
.stat-box { background: var(--bg); border: 1px solid var(--line-soft); border-radius: var(--radius-sm); padding: 14px 16px; }
.stat-box .num { font-size: 26px; font-weight: 800; letter-spacing: -.02em; color: var(--accent); font-variant-numeric: tabular-nums; line-height: 1.1; }
.stat-box .lab { font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 700; margin-top: 4px; }
.tool-row { display: flex; gap: 9px; flex-wrap: wrap; align-items: center; margin: 14px 0; }
.out-row { display: grid; grid-template-columns: 150px 1fr auto; gap: 12px; align-items: center; padding: 11px 14px; background: var(--bg); border: 1px solid var(--line-soft); border-radius: var(--radius-sm); }
.out-row + .out-row { margin-top: 9px; }
.out-row .lab { font-size: 12.5px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.out-row .val { font-family: var(--mono); font-size: 13.5px; color: var(--ink); word-break: break-word; overflow-wrap: anywhere; }
.copied { color: var(--good); font-size: 12.5px; font-weight: 700; }
.field { display: flex; flex-direction: column; gap: 6px; margin: 12px 0; }
.field label { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.msg-ok { color: var(--good); font-weight: 700; font-size: 13.5px; }
.msg-err { color: #bc3a56; font-weight: 700; font-size: 13.5px; }
@media (max-width: 560px) { .out-row { grid-template-columns: 1fr; gap: 6px; } }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .tool-grid, .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .tool-grid, .related-grid { grid-template-columns: 1fr; }
  .header-nav a.nav-hide { display: none; }
  .hero { padding: 38px 0 18px; }
  .controls { gap: 14px; }
  input[type="range"] { width: 140px; }
  .file-row { grid-template-columns: 44px 1fr; }
  .file-row .thumb { width: 44px; height: 44px; }
  .file-actions { grid-column: 1 / -1; just-content: flex-start; }
}