/* ==========================================================================
   PDF Toolkit AI — Design System
   Light & Dark theme via CSS variables. Mobile-first.
   ========================================================================== */

:root {
  --bg: #f7f8fc;
  --bg-elev: #ffffff;
  --bg-soft: #eef0f6;
  --text: #0f172a;
  --text-soft: #475569;
  --text-mute: #94a3b8;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --brand: #6366f1;
  --brand-2: #8b5cf6;
  --brand-3: #ec4899;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow: 0 4px 12px rgba(15, 23, 42, .08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, .12);
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 22px;
  --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-soft: linear-gradient(135deg, rgba(99,102,241,.10), rgba(236,72,153,.10));
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
}

[data-theme="dark"] {
  --bg: #0b1020;
  --bg-elev: #131a30;
  --bg-soft: #1a2240;
  --text: #f1f5f9;
  --text-soft: #cbd5e1;
  --text-mute: #64748b;
  --border: #1f2a48;
  --border-strong: #2c3a5e;
  --brand: #818cf8;
  --brand-2: #a78bfa;
  --brand-3: #f472b6;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 4px 16px rgba(0, 0, 0, .35);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, .5);
  --gradient-soft: linear-gradient(135deg, rgba(129,140,248,.15), rgba(244,114,182,.15));
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  transition: background .25s ease, color .25s ease;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

/* ============================== Layout ============================== */

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: 64px 0; }
.section-sm { padding: 36px 0; }

.grid {
  display: grid;
  gap: 22px;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ============================== Navbar ============================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
}
.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 17px;
  box-shadow: var(--shadow-sm);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  color: var(--text-soft);
  font-weight: 500;
  font-size: 14px;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}
@media (max-width: 768px) {
  .nav-links { display: none; }
}

/* ============================== Buttons ============================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all .2s ease;
  background: var(--bg-elev);
  color: var(--text);
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 24px rgba(99,102,241,.35);
}
.btn-primary:hover { box-shadow: 0 12px 30px rgba(99,102,241,.45); }
.btn-ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-soft); color: var(--text); }
.btn-lg { padding: 14px 28px; font-size: 16px; border-radius: 12px; }
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* ============================== Hero ============================== */

.hero {
  position: relative;
  padding: 80px 0 60px;
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -10% -10% auto -10%;
  height: 70%;
  background: radial-gradient(ellipse at center, rgba(99,102,241,.18), transparent 60%);
  z-index: -1;
}
.hero h1 {
  font-size: clamp(34px, 5.5vw, 60px);
  line-height: 1.1;
  margin: 0 0 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.hero h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--text-soft);
  max-width: 640px;
  margin: 0 auto 30px;
}
.hero-badges {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero-badges .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(16,185,129,.18);
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ============================== Cards ============================== */

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}
.tool-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
}
.tool-card .icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 22px;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  color: var(--brand);
}
.tool-card h3 {
  font-size: 17px;
  margin: 0;
  font-weight: 700;
}
.tool-card p {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0;
}
.tool-card .tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--text-mute);
  margin-top: auto;
}
.tool-card .arrow {
  position: absolute;
  top: 22px; right: 22px;
  color: var(--text-mute);
  font-size: 18px;
  transition: transform .2s ease, color .2s ease;
}
.tool-card:hover .arrow { color: var(--brand); transform: translate(3px, -3px); }

.section-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-align: center;
  margin: 0 0 12px;
}
.section-sub {
  text-align: center;
  color: var(--text-soft);
  max-width: 600px;
  margin: 0 auto 40px;
}

/* ============================== Feature strip ============================== */

.feature-strip {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 18px;
  margin-top: 30px;
}
.feature-strip .item {
  display: flex; align-items: center; gap: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-soft);
}
.feature-strip .ic {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--gradient-soft);
  display: grid; place-items: center;
  font-size: 17px;
  flex-shrink: 0;
}
@media (max-width: 800px) {
  .feature-strip { grid-template-columns: repeat(2, 1fr); }
}

/* ============================== Tool Page ============================== */

.tool-hero {
  padding: 56px 0 28px;
  text-align: center;
}
.tool-hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.tool-hero p { color: var(--text-soft); max-width: 600px; margin: 0 auto; }

.workspace {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  margin-bottom: 40px;
}

.dropzone {
  position: relative;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  background: var(--bg-soft);
  cursor: pointer;
  transition: all .2s ease;
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--brand);
  background: var(--gradient-soft);
}
.dropzone .icon {
  font-size: 48px;
  margin-bottom: 12px;
  display: block;
}
.dropzone h3 { margin: 0 0 6px; font-size: 18px; }
.dropzone p { margin: 0; color: var(--text-soft); font-size: 14px; }
.dropzone input[type="file"] {
  position: absolute; inset: 0;
  opacity: 0;
  cursor: pointer;
}

.options-panel {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-soft);
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(99,102,241,.18);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
  align-items: center;
}

.eta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--bg-soft);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  transition: opacity .2s ease;
}
.eta-badge[hidden] { display: none; }
.eta-badge.is-working { color: var(--primary); border-color: var(--primary); background: var(--bg); }
.eta-badge.is-done { color: #16a34a; border-color: #16a34a; background: var(--bg); }
.eta-badge.is-overrun { color: #b91c1c; border-color: #b91c1c; background: var(--bg); }
:root[data-theme="dark"] .eta-badge.is-working { color: #a5b4fc; border-color: #4f46e5; }
:root[data-theme="dark"] .eta-badge.is-done { color: #4ade80; border-color: #16a34a; }
:root[data-theme="dark"] .eta-badge.is-overrun { color: #fca5a5; border-color: #dc2626; }

.file-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.file-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.file-row .name { flex: 1; font-size: 14px; font-weight: 500; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-row .size { color: var(--text-mute); font-size: 12px; }
.file-row .x {
  background: transparent;
  border: none;
  color: var(--text-mute);
  font-size: 18px;
  cursor: pointer;
  width: 28px; height: 28px;
  border-radius: 6px;
}
.file-row .x:hover { background: var(--bg); color: var(--danger); }

.progress-wrap {
  margin-top: 20px;
  display: none;
}
.progress-wrap.active { display: block; }
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-soft);
  margin-bottom: 6px;
}
.progress {
  height: 8px;
  background: var(--bg-soft);
  border-radius: 100px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: var(--gradient);
  width: 0%;
  transition: width .25s ease;
  border-radius: 100px;
}

.result {
  margin-top: 24px;
  padding: 20px;
  background: color-mix(in srgb, var(--success) 10%, var(--bg-elev));
  border: 1px solid color-mix(in srgb, var(--success) 35%, var(--border));
  border-radius: var(--radius);
  display: none;
}
.result.active { display: block; }
.result h4 { margin: 0 0 6px; color: var(--success); }
.result .result-meta {
  font-size: 13px;
  color: var(--text-soft);
  margin-bottom: 14px;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.preview-grid .thumb {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 3/4;
}
.preview-grid .thumb canvas, .preview-grid .thumb img {
  width: 100%; height: 100%; object-fit: contain;
}

/* ============================== FAQ ============================== */

.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 12px;
  transition: border-color .2s ease;
}
.faq details[open] { border-color: var(--brand); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq summary::after {
  content: "+";
  font-size: 22px;
  color: var(--text-mute);
  transition: transform .2s ease;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 12px 0 0; color: var(--text-soft); font-size: 14px; }

/* ============================== Footer ============================== */

.footer {
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  padding: 50px 0 30px;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 30px;
}
.footer h5 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-mute);
  margin: 0 0 14px;
  font-weight: 700;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer ul li { margin-bottom: 8px; }
.footer ul a { color: var(--text-soft); font-size: 14px; }
.footer ul a:hover { color: var(--text); text-decoration: none; }
.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-mute);
  flex-wrap: wrap;
  gap: 10px;
}
@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================== Theme toggle ============================== */

.theme-toggle {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  cursor: pointer;
  display: grid; place-items: center;
  font-size: 17px;
  transition: all .2s ease;
}
.theme-toggle:hover { background: var(--bg-soft); }

/* ============================== Cookie banner ============================== */

.cookie-banner {
  position: fixed;
  bottom: 16px;
  left: 16px; right: 16px;
  max-width: 560px;
  margin: 0 auto;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  display: none;
  font-size: 13px;
  color: var(--text-soft);
}
.cookie-banner.show { display: block; }
.cookie-banner .row {
  display: flex; gap: 12px; align-items: center; justify-content: space-between;
  flex-wrap: wrap;
}
.cookie-banner p { margin: 0 0 10px; }
.cookie-banner button {
  background: var(--gradient);
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 13px;
}

/* ============================== Loader ============================== */

.loader {
  width: 18px; height: 18px;
  border: 2.5px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .8s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================== Misc ============================== */

.muted { color: var(--text-mute); }
.soft  { color: var(--text-soft); }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }
.hidden { display: none !important; }
.flex { display: flex; }
.gap-2 { gap: 12px; } .gap-3 { gap: 18px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* prose content (blog) */
.prose {
  max-width: 740px;
  margin: 0 auto;
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.8;
}
.prose h1, .prose h2, .prose h3 { color: var(--text); }
.prose h2 { margin-top: 38px; font-size: 26px; }
.prose h3 { margin-top: 26px; font-size: 20px; }
.prose code {
  background: var(--bg-soft);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--text);
}
.prose ul, .prose ol { padding-left: 22px; }
.prose a { color: var(--brand); }

/* ============================== Breadcrumb ============================== */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--text-mute);
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px 24px 0;
}
.breadcrumb a {
  color: var(--text-soft);
  text-decoration: none;
  transition: color .15s ease;
}
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb .sep { opacity: .4; }
.breadcrumb .current { color: var(--text); font-weight: 500; }

/* ============================== Category Card (homepage) ============================== */

.cat-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
  padding: 24px 22px;
  background: var(--bg-elev);
}
.cat-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity .25s ease;
}
.cat-card:hover::before { opacity: 1; }
.cat-card .cat-head {
  display: flex;
  align-items: center;
  gap: 14px;
}
.cat-card .cat-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  flex-shrink: 0;
  color: var(--brand);
  text-decoration: none !important;
  transition: transform .2s ease, box-shadow .2s ease;
}
.cat-card .cat-icon:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(99,102,241,.18);
}
.cat-card .cat-icon svg {
  width: 24px;
  height: 24px;
  display: block;
}
.cat-card h3 {
  font-size: 19px;
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.cat-card h3 a {
  color: var(--text);
  text-decoration: none;
  transition: color .15s ease;
}
.cat-card h3 a:hover {
  color: var(--brand);
}
.cat-card .cat-sub {
  color: var(--text-soft);
  font-size: 13.5px;
  line-height: 1.55;
  margin: 0;
}
.cat-card .cat-tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 4px 0 0;
}
.cat-card .cat-tools-grid.is-single {
  grid-template-columns: 1fr;
}
.cat-card .cat-tools-grid.is-wide {
  grid-template-columns: 1fr;
}
.cat-card .cat-tools-grid.is-wide .mini-tool {
  flex-direction: row;
}

.mini-tool {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px 11px 13px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none !important;
  color: var(--text) !important;
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.2;
  transition: all .18s ease;
  position: relative;
  min-width: 0;
  overflow: hidden;
}
.mini-tool .ic {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  display: grid; place-items: center;
  flex-shrink: 0;
  color: var(--brand);
  transition: all .18s ease;
}
.mini-tool .ic svg {
  width: 16px; height: 16px;
  display: block;
}
.mini-tool .label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.mini-tool .arrow {
  font-size: 13px;
  color: var(--text-mute);
  transition: all .18s ease;
  flex-shrink: 0;
  margin-left: 4px;
}
.mini-tool:hover {
  border-color: var(--brand);
  background: var(--bg-elev);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99,102,241,.14);
}
.mini-tool:hover .ic {
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
  transform: scale(1.05);
}
.mini-tool:hover .arrow {
  color: var(--brand);
  transform: translateX(2px);
}

.cat-card .cat-foot {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--brand) !important;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none !important;
  transition: gap .2s ease;
}
.cat-card .cat-foot:hover { gap: 10px; text-decoration: none; }

/* ============================== Category Page ============================== */

.cat-hero {
  padding: 56px 0 32px;
  text-align: center;
}
.cat-hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  line-height: 1.15;
}
.cat-hero .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cat-hero p {
  font-size: 17px;
  color: var(--text-soft);
  max-width: 640px;
  margin: 0 auto 22px;
  line-height: 1.6;
}
.cat-hero .cat-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-mute);
  padding: 6px 14px;
  background: var(--bg-soft);
  border-radius: 999px;
  border: 1px solid var(--border);
}
.cat-hero .cat-meta svg {
  flex-shrink: 0;
  color: var(--brand);
}

.tool-grid-large {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
@media (max-width: 900px) {
  .tool-grid-large { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .tool-grid-large { grid-template-columns: 1fr; }
}

/* ============================== Related tools (tool pages) ============================== */

.related-tools {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.related-tools h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 22px;
  text-align: center;
}
.related-tools .grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
@media (max-width: 800px) {
  .related-tools .grid { grid-template-columns: 1fr; }
}

/* ============================== Feedback Module ============================== */

.feedback-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 10px;
  border: 1.5px solid var(--brand);
  background: transparent;
  color: var(--brand);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all .2s ease;
  white-space: nowrap;
  font-family: var(--font);
}
.feedback-trigger:hover {
  background: var(--brand);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(99,102,241,.3);
}
.feedback-trigger svg { flex-shrink: 0; }

@media (max-width: 640px) {
  .feedback-trigger span { display: none; }
  .feedback-trigger { padding: 7px 10px; }
}

/* ---- Overlay ---- */
.feedback-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(15, 23, 42, .5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease, visibility .25s ease;
}
.feedback-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ---- Modal card ---- */
.feedback-modal {
  background: var(--bg-elev);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px;
  position: relative;
  transform: translateY(20px) scale(.98);
  transition: transform .25s ease;
}
.feedback-overlay.active .feedback-modal {
  transform: translateY(0) scale(1);
}

/* ---- Close button ---- */
.feedback-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-soft);
  border-radius: 8px;
  font-size: 22px;
  line-height: 1;
  color: var(--text-soft);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all .15s ease;
}
.feedback-close:hover {
  color: var(--text);
  transform: scale(1.08);
}

/* ---- Header ---- */
.feedback-header h2 {
  font-size: 22px;
  font-weight: 800;
  margin: 0 0 6px;
  padding-right: 36px;
}
.feedback-header p {
  color: var(--text-soft);
  font-size: 14px;
  margin: 0 0 24px;
  line-height: 1.5;
}

/* ---- Type selector ---- */
.feedback-types {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}
.feedback-type {
  cursor: pointer;
  display: block;
}
.feedback-type input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.type-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 5px;
  padding: 14px 6px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  transition: all .18s ease;
  background: var(--bg-soft);
  height: 100%;
}
.feedback-type input:checked + .type-card {
  border-color: var(--brand);
  background: var(--gradient-soft);
}
.feedback-type:hover .type-card {
  border-color: var(--brand);
}
.type-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--brand);
  flex-shrink: 0;
}
.type-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
}
.type-desc {
  font-size: 10.5px;
  color: var(--text-mute);
  line-height: 1.3;
}

@media (max-width: 480px) {
  .feedback-types { grid-template-columns: 1fr; }
  .type-card {
    flex-direction: row;
    text-align: left;
    gap: 10px;
    padding: 12px 14px;
  }
}

/* ---- Form fields ---- */
.feedback-field { margin-bottom: 16px; }
.feedback-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}
.feedback-field label .req { color: var(--danger); }
.feedback-field label .opt { color: var(--text-mute); font-weight: 400; }
.feedback-field textarea,
.feedback-field input[type="email"] {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--bg-soft);
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
  resize: vertical;
  transition: border-color .15s ease;
}
.feedback-field textarea:focus,
.feedback-field input[type="email"]:focus {
  outline: none;
  border-color: var(--brand);
}
.feedback-field textarea::placeholder,
.feedback-field input::placeholder {
  color: var(--text-mute);
}

.feedback-submit { margin-top: 4px; }

/* ---- Success state ---- */
.feedback-success {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  padding: 20px 0;
}
.success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--success);
  color: #fff;
  display: grid;
  place-items: center;
}
.feedback-success h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}
.feedback-success p {
  color: var(--text-soft);
  font-size: 14px;
  margin: 0;
  line-height: 1.5;
}