/* ============================================================
   PrivTools — main.css
   Design system: variables, reset, layout, components
   ============================================================ */

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #8b5cf6;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --grad: linear-gradient(135deg, #6366f1, #8b5cf6);

  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --bg-muted: #f1f5f9;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.07), 0 4px 6px rgba(0,0,0,.05);
  --radius: 8px;
  --radius-sm: 4px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --transition: .2s ease;
}
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  --bg-muted: #1e293b;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --shadow: 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,.25);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.25);
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

/* ── Layout ─────────────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1rem; }
.container-sm { max-width: 800px; margin: 0 auto; padding: 0 1rem; }
.grid { display: grid; }
.flex { display: flex; }
.hidden { display: none !important; }

/* ── Typography helpers ─────────────────────────────────────── */
h1,h2,h3,h4 { line-height: 1.3; color: var(--text); }
.text-sm  { font-size: .875rem; }
.text-xs  { font-size: .75rem; }
.text-muted { color: var(--text-muted); }
.font-mono { font-family: "SF Mono", "Fira Code", "Menlo", monospace; }
.break-all { word-break: break-all; }
.text-center { text-align: center; }

/* ── Navbar ─────────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: background var(--transition), border-color var(--transition);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 1rem; }
.nav-logo { font-size: 1.1rem; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: .4rem; }
.nav-logo:hover { text-decoration: none; color: var(--primary); }
.nav-breadcrumb { font-size: .85rem; color: var(--text-muted); flex: 1; }
.nav-right { display: flex; align-items: center; gap: .5rem; }
.btn-back {
  display: flex; align-items: center; gap: .3rem;
  font-size: .85rem; font-weight: 500;
  padding: .4rem .75rem;
  border-radius: var(--radius-full);
  background: var(--bg-muted);
  color: var(--text);
  transition: background var(--transition);
  white-space: nowrap;
}
.btn-back:hover { background: var(--border); text-decoration: none; }

/* ── Theme toggle button ────────────────────────────────────── */
#theme-toggle {
  position: fixed; bottom: 80px; right: 20px;
  display: flex; align-items: center; gap: .35rem;
  padding: .5rem .85rem;
  background: var(--grad); color: #fff;
  border: none; border-radius: var(--radius-full);
  font-size: .85rem; font-weight: 500;
  box-shadow: var(--shadow-md);
  z-index: 200;
  transition: opacity var(--transition);
}
#theme-toggle:hover { opacity: .9; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .55rem 1.1rem;
  border: none; border-radius: var(--radius);
  font-size: .9rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
  white-space: nowrap;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--grad); color: #fff; }
.btn-primary:hover:not(:disabled) { opacity: .9; transform: translateY(-1px); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { opacity: .9; }
.btn-danger  { background: var(--error); color: #fff; }
.btn-danger:hover:not(:disabled)  { opacity: .9; }
.btn-gray    { background: var(--bg-muted); color: var(--text); border: 1px solid var(--border); }
.btn-gray:hover:not(:disabled)    { background: var(--border); }
.btn-lg { padding: .7rem 1.4rem; font-size: 1rem; }
.btn-sm { padding: .35rem .7rem; font-size: .8rem; }
.btn-icon { background: none; border: none; color: var(--text-muted); padding: .4rem; border-radius: var(--radius-sm); }
.btn-icon:hover { color: var(--text); background: var(--bg-muted); }

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: background var(--transition), border-color var(--transition);
}
.card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 1rem; }

/* ── Form controls ──────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: .35rem; }
.form-label { font-size: .85rem; font-weight: 500; color: var(--text); }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: .55rem .75rem;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  transition: border-color var(--transition), background var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.form-textarea { resize: vertical; min-height: 100px; }
.form-hint { font-size: .78rem; color: var(--text-muted); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

/* Range input */
input[type="range"] { accent-color: var(--primary); cursor: pointer; }

/* Checkbox */
input[type="checkbox"] { accent-color: var(--primary); cursor: pointer; width: 16px; height: 16px; }

/* ── Drop Zone ──────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-muted);
  position: relative;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--primary);
  background: rgba(99,102,241,.06);
}
.drop-zone input[type="file"] { display: none; }
.drop-zone-icon { font-size: 2.5rem; margin-bottom: .75rem; }
.drop-zone-title { font-size: 1rem; font-weight: 500; margin-bottom: .3rem; }
.drop-zone-hint { font-size: .85rem; color: var(--text-muted); }

/* ── Tabs ───────────────────────────────────────────────────── */
.tabs { display: flex; gap: .4rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.tab-btn {
  padding: .5rem 1rem; border: 1px solid var(--border);
  border-radius: var(--radius-full); background: var(--bg-muted);
  color: var(--text-muted); font-size: .875rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.tab-btn:hover { border-color: var(--primary); color: var(--primary); }
.tab-btn.active { background: var(--grad); color: #fff; border-color: transparent; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Tool Hero ──────────────────────────────────────────────── */
.tool-hero {
  background: var(--grad);
  color: #fff;
  padding: 2rem 0;
  margin-bottom: 2rem;
}
.tool-hero h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: .3rem; }
.tool-hero p  { font-size: .95rem; opacity: .9; }
.tool-hero-inner { display: flex; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }

/* ── Progress bar ───────────────────────────────────────────── */
.progress {
  height: 6px; background: var(--border);
  border-radius: var(--radius-full); overflow: hidden;
}
.progress-bar {
  height: 100%; background: var(--grad);
  border-radius: var(--radius-full);
  width: 0; transition: width .3s ease;
}

/* ── Notifications (toast) ──────────────────────────────────── */
#toast-container {
  position: fixed; top: 1rem; right: 1rem;
  z-index: 2000; display: flex; flex-direction: column; gap: .5rem;
}
.toast {
  min-width: 240px; max-width: 360px;
  background: var(--bg-card); color: var(--text);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  box-shadow: var(--shadow-lg);
  font-size: .875rem;
  opacity: 0; transform: translateX(120%);
  transition: all .3s ease;
}
.toast.show { opacity: 1; transform: translateX(0); }
.toast.success { border-left-color: var(--success); }
.toast.error   { border-left-color: var(--error); }
.toast.warning { border-left-color: var(--warning); }

/* ── Support Modal ──────────────────────────────────────────── */
#support-modal {
  position: fixed; inset: 0; z-index: 1500;
  background: rgba(0,0,0,.5);
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
#support-modal.hidden { display: none; }
.modal-box {
  background: var(--bg-card); color: var(--text);
  border-radius: var(--radius-xl);
  padding: 2rem; max-width: 420px; width: 100%;
  box-shadow: var(--shadow-lg);
}
.modal-title { font-size: 1.25rem; font-weight: 700; margin-bottom: .75rem; }
.modal-body  { color: var(--text-muted); margin-bottom: 1.25rem; font-size: .9rem; }

/* Support FAB */
#support-fab {
  position: fixed; bottom: 20px; right: 20px;
  background: var(--grad); color: #fff;
  border: none; border-radius: var(--radius-full);
  padding: .7rem 1.2rem;
  font-size: .9rem; font-weight: 600;
  box-shadow: var(--shadow-md); cursor: pointer; z-index: 200;
  transition: opacity var(--transition);
}
#support-fab:hover { opacity: .9; }

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 2rem 0; margin-top: 4rem;
  text-align: center;
  font-size: .875rem; color: var(--text-muted);
  transition: background var(--transition), border-color var(--transition);
}
.footer-links { display: flex; justify-content: center; gap: .75rem; flex-wrap: wrap; margin: .75rem 0; }
.footer-links a { color: var(--text-muted); }
.footer-links a:hover { color: var(--text); }

/* ── Scroll Reveal ──────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .5s ease, transform .5s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ── Index page: Hero ───────────────────────────────────────── */
.hero {
  background: var(--grad); color: #fff;
  padding: 5rem 0 3.5rem;
  text-align: center;
}
.hero h1 { font-size: clamp(1.8rem, 5vw, 3rem); font-weight: 800; margin-bottom: .75rem; }
.hero p   { font-size: clamp(.95rem, 2vw, 1.2rem); opacity: .9; max-width: 600px; margin: 0 auto 2rem; }
.hero-stats {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; margin-top: 2.5rem;
}
.stat { text-align: center; }
.stat-num { font-size: 2rem; font-weight: 800; }
.stat-label { font-size: .8rem; opacity: .8; text-transform: uppercase; letter-spacing: .05em; }

/* ── Index page: Search + Filter ───────────────────────────── */
.search-section { padding: 1.5rem 0; }
.search-bar {
  display: flex; gap: .75rem; flex-wrap: wrap;
  align-items: center; margin-bottom: 1rem;
}
.search-bar input {
  flex: 1; min-width: 200px;
  padding: .65rem 1rem;
  background: var(--bg-card); color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: .95rem;
  transition: border-color var(--transition), background var(--transition);
}
.search-bar input:focus { outline: none; border-color: var(--primary); }
.filter-bar { display: flex; flex-wrap: wrap; gap: .5rem; }
.filter-btn {
  padding: .35rem .85rem; border-radius: var(--radius-full);
  background: var(--bg-muted); border: 1px solid var(--border);
  color: var(--text-muted); font-size: .82rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--grad); color: #fff; border-color: transparent; }

/* ── Index page: Tools grid ─────────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  padding: 1.5rem 0 3rem;
}
.tool-card {
  display: flex; flex-direction: column;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.35rem;
  text-decoration: none; color: var(--text);
  transition: all .25s ease;
  box-shadow: var(--shadow);
}
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--primary); text-decoration: none; }
.tool-card-icon { font-size: 2rem; margin-bottom: .6rem; }
.tool-card-name { font-weight: 600; font-size: 1rem; margin-bottom: .3rem; }
.tool-card-desc { font-size: .82rem; color: var(--text-muted); flex: 1; line-height: 1.5; }
.tool-card-badge {
  display: inline-block; margin-top: .75rem;
  padding: .2rem .6rem; font-size: .7rem; font-weight: 600;
  background: rgba(99,102,241,.1); color: var(--primary);
  border-radius: var(--radius-full);
}
.tool-card.hidden-filter { display: none; }

/* ── Index page: About section ─────────────────────────────── */
.about-section { padding: 4rem 0; }
.about-section h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: .5rem; }
.skill-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0; }
.skill-tag {
  padding: .3rem .75rem; background: rgba(99,102,241,.1);
  color: var(--primary); border-radius: var(--radius-full);
  font-size: .8rem; font-weight: 500;
}
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
@media (max-width: 700px) { .about-grid { grid-template-columns: 1fr; } }

/* ── Tool page specific: Algorithm cards ───────────────────── */
.algo-card {
  display: flex; align-items: center; gap: .5rem;
  padding: .75rem 1rem;
  border: 2px solid var(--border); border-radius: var(--radius);
  cursor: pointer; transition: all var(--transition);
  background: var(--bg-card);
}
.algo-card:hover  { border-color: var(--primary); }
.algo-card.selected { border-color: var(--primary); background: rgba(99,102,241,.08); }
.algo-card label { cursor: pointer; font-weight: 500; }
.algo-card .algo-desc { font-size: .75rem; color: var(--text-muted); margin-top: .15rem; }

/* ── Hash output ─────────────────────────────────────────────── */
.hash-result { border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; }
.hash-result-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: .5rem; }
.hash-value {
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: .8rem; word-break: break-all; line-height: 1.6;
  background: var(--bg-muted); padding: .5rem .75rem;
  border-radius: var(--radius-sm); color: var(--text);
}

/* ── Comparison result ──────────────────────────────────────── */
.cmp-match   { background: #ecfdf5; border: 1px solid #10b981; border-radius: var(--radius); padding: 1rem; color: #065f46; }
.cmp-nomatch { background: #fef2f2; border: 1px solid #ef4444; border-radius: var(--radius); padding: 1rem; color: #991b1b; }
[data-theme="dark"] .cmp-match   { background: rgba(16,185,129,.1); color: #6ee7b7; }
[data-theme="dark"] .cmp-nomatch { background: rgba(239,68,68,.1); color: #fca5a5; }

/* ── File list (bulk renamer) ───────────────────────────────── */
.file-item {
  display: grid; grid-template-columns: 1fr 1fr auto;
  gap: 1rem; align-items: center;
  padding: .75rem 1rem;
  background: var(--bg-muted); border: 1px solid var(--border);
  border-radius: var(--radius); font-size: .85rem;
  transition: all var(--transition);
}
.file-item.changed { background: rgba(16,185,129,.07); border-color: var(--success); }
.file-name-original { font-family: monospace; color: var(--text); }
.file-name-new { font-family: monospace; color: var(--success); font-weight: 500; }

/* ── Invoice table ──────────────────────────────────────────── */
.invoice-table { width: 100%; border-collapse: collapse; }
.invoice-table th, .invoice-table td {
  border: 1px solid var(--border); padding: .75rem;
  text-align: left; background: var(--bg-card); color: var(--text);
}
.invoice-table th { background: var(--bg-muted); font-weight: 600; }
.invoice-table tfoot td { font-weight: 600; }
.invoice-total { background: rgba(99,102,241,.06) !important; border-color: var(--primary) !important; }

/* ── Audio player ───────────────────────────────────────────── */
.audio-player {
  background: #1e293b; border-radius: var(--radius-lg);
  padding: 1.5rem; color: #f1f5f9;
}
[data-theme="dark"] .audio-player { background: #0f172a; }
.waveform-wrap {
  position: relative; background: #334155;
  border-radius: var(--radius); min-height: 80px; margin: 1rem 0;
  overflow: hidden;
}
.waveform { width: 100%; height: 80px; background: linear-gradient(90deg, #10b981, #059669, #10b981); border-radius: 4px; position: relative; }
.playhead { position: absolute; top: 0; bottom: 0; width: 2px; background: #ef4444; z-index: 5; transition: left .1s ease; }
.trim-region { position: absolute; top: 0; bottom: 0; background: rgba(34,197,94,.2); border: 1px solid #22c55e; z-index: 2; }
.trim-marker { position: absolute; top: 0; bottom: 0; width: 3px; z-index: 3; cursor: ew-resize; }
.trim-start { background: #22c55e; left: 0; }
.trim-end   { background: #f59e0b; }
.time-badge {
  font-family: monospace; font-size: .8rem;
  background: #334155; color: #f3f4f6;
  padding: .3rem .6rem; border-radius: var(--radius-sm);
}
.audio-btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .55rem .9rem;
  background: var(--primary); color: #fff;
  border: none; border-radius: var(--radius);
  font-size: .875rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.audio-btn:hover:not(:disabled) { background: var(--primary-dark); }
.audio-btn:disabled { background: #4b5563; cursor: not-allowed; }

/* ── Category card (unit converter) ────────────────────────── */
.category-card {
  padding: 1rem; border: 2px solid var(--border);
  border-radius: var(--radius-lg); cursor: pointer;
  text-align: center; background: var(--bg-card);
  transition: all var(--transition);
}
.category-card:hover  { border-color: var(--primary); transform: translateY(-2px); }
.category-card.active { border-color: var(--primary); background: rgba(99,102,241,.08); }
.category-icon { font-size: 1.75rem; margin-bottom: .4rem; }

/* ── Quick convert items ─────────────────────────────────────── */
.quick-item {
  padding: .75rem 1rem; background: var(--bg-muted);
  border: 1px solid var(--border); border-radius: var(--radius);
  cursor: pointer; transition: all var(--transition);
  font-size: .85rem;
}
.quick-item:hover { border-color: var(--primary); background: rgba(99,102,241,.06); }

/* ── Conversion result box ──────────────────────────────────── */
.conversion-result {
  background: rgba(99,102,241,.07); border: 2px solid var(--primary);
  border-radius: var(--radius-lg); padding: 1rem;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.conversion-value { font-size: 1.2rem; font-weight: 700; color: var(--primary); }
.conversion-formula { font-size: .8rem; color: var(--text-muted); }

/* ── History items ───────────────────────────────────────────── */
.history-item {
  padding: .6rem .9rem; background: var(--bg-muted);
  border: 1px solid var(--border); border-radius: var(--radius);
  font-family: monospace; font-size: .82rem;
  cursor: pointer; transition: all var(--transition);
}
.history-item:hover { border-color: var(--primary); }

/* ── Stats cards ─────────────────────────────────────────────── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 1rem; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1rem; text-align: center; }
.stat-card-num { font-size: 1.75rem; font-weight: 700; color: var(--primary); }
.stat-card-label { font-size: .75rem; color: var(--text-muted); }

/* ── Image grid (pdf-to-image) ──────────────────────────────── */
.image-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; }
.image-card { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; text-align: center; background: var(--bg-card); }
.image-card img { width: 100%; display: block; }
.image-card-label { padding: .5rem; font-size: .75rem; color: var(--text-muted); }

/* ── Page grid (split-pdf) ──────────────────────────────────── */
.page-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: .5rem; }
.page-thumb {
  border: 2px solid var(--border); border-radius: var(--radius);
  padding: .5rem; text-align: center; cursor: pointer;
  background: var(--bg-card); transition: all var(--transition);
  font-size: .75rem;
}
.page-thumb:hover  { border-color: var(--primary); }
.page-thumb.selected { border-color: var(--primary); background: rgba(99,102,241,.1); }
.page-thumb input { margin-bottom: .3rem; }

/* ── File list (merge-pdf) ──────────────────────────────────── */
.merge-file-item {
  display: flex; align-items: center; gap: .75rem;
  padding: .75rem 1rem; background: var(--bg-muted);
  border: 1px solid var(--border); border-radius: var(--radius);
  cursor: grab; transition: all var(--transition);
}
.merge-file-item:hover { border-color: var(--primary); }
.merge-file-item.dragging { opacity: .5; }

/* ── Color palette grid ─────────────────────────────────────── */
.palette-grid { display: flex; gap: .5rem; flex-wrap: wrap; }
.palette-swatch {
  width: 70px; height: 70px; border-radius: var(--radius);
  cursor: pointer; position: relative;
  border: 2px solid transparent; transition: transform var(--transition);
}
.palette-swatch:hover { transform: scale(1.05); }
.palette-swatch-hex {
  position: absolute; bottom: 2px; left: 0; right: 0;
  text-align: center; font-size: .65rem; font-weight: 600;
  background: rgba(0,0,0,.35); color: #fff;
  padding: 1px; border-radius: 0 0 4px 4px;
}

/* ── Gradient preview ───────────────────────────────────────── */
.gradient-preview {
  width: 100%; height: 150px;
  border-radius: var(--radius-lg); border: 1px solid var(--border);
  margin-bottom: 1rem;
}
.color-stop-item {
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem; background: var(--bg-muted);
  border-radius: var(--radius); margin-bottom: .4rem;
}

/* ── Code output ─────────────────────────────────────────────── */
.code-output {
  background: var(--bg-muted); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: .85rem; word-break: break-all; color: var(--text);
  white-space: pre-wrap;
}

/* ── Password strength bar ──────────────────────────────────── */
.strength-bar {
  height: 8px; border-radius: var(--radius-full);
  background: var(--border); overflow: hidden; margin: .5rem 0;
}
.strength-fill { height: 100%; border-radius: var(--radius-full); transition: all .3s ease; }

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-muted); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Print ──────────────────────────────────────────────────── */
@media print {
  .navbar, .site-footer, #support-fab, #theme-toggle, .print-hidden { display: none !important; }
  body { background: #fff; color: #000; }
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .tool-hero h1 { font-size: 1.4rem; }
  .tools-grid   { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .file-item    { grid-template-columns: 1fr; }
  .about-grid   { grid-template-columns: 1fr; }
  .form-row     { grid-template-columns: 1fr; }
  .nav-breadcrumb { display: none; }
}