/* ===========================
   compress-pdf.cc — Minimalist Design
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=DM+Sans:wght@300;400;500;600&display=swap');

:root {
  --bg:         #fafaf9;
  --bg2:        #f3f2f0;
  --surface:    #ffffff;
  --border:     #e5e3df;
  --border-strong: #c9c5be;
  --text:       #18181b;
  --text-2:     #52525b;
  --muted:      #a1a1aa;
  --accent:     #1a6fe8;
  --brand:      #1a6fe8;
  --accent-dim: rgba(26, 111, 232, 0.08);
  --accent-mid: rgba(26, 111, 232, 0.18);
  --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow:     0 4px 16px rgba(0,0,0,.07), 0 1px 3px rgba(0,0,0,.04);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.10), 0 2px 8px rgba(0,0,0,.05);
  --radius-sm:  6px;
  --radius:     12px;
  --radius-lg:  18px;
  --font-head:  'Instrument Serif', Georgia, serif;
  --font-body:  'DM Sans', -apple-system, sans-serif;
  --ease:       cubic-bezier(.25, .46, .45, .94);
  --transition: .22s var(--ease);
}

[data-theme="dark"] {
  --bg:         #0f0f0f;
  --bg2:        #161616;
  --surface:    #1c1c1c;
  --border:     #2a2a2a;
  --border-strong: #3f3f3f;
  --text:       #fafafa;
  --text-2:     #a8a8a8;
  --muted:      #5a5a5a;
  --accent:     #4a8ff5;
  --brand:      #4a8ff5;
  --accent-dim: rgba(74, 143, 245, 0.1);
  --accent-mid: rgba(74, 143, 245, 0.2);
  --shadow-sm:  0 1px 3px rgba(0,0,0,.3);
  --shadow:     0 4px 20px rgba(0,0,0,.4);
  --shadow-lg:  0 12px 48px rgba(0,0,0,.5);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ─── Navigation ─── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(24px) saturate(1.5);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 var(--border), 0 2px 12px rgba(0,0,0,.04);
  transition: background var(--transition), border-color var(--transition);
}

[data-theme="dark"] nav {
  background: rgba(15,15,15,0.85);
}

.nav-inner {
  max-width: 1160px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 28px; height: 64px;
}

.logo {
  font-family: var(--font-body);
  font-size: 1rem; font-weight: 600;
  color: var(--text); text-decoration: none;
  display: flex; align-items: center; gap: 10px;
  letter-spacing: -.02em;
}

.logo-icon {
  width: 34px; height: 34px;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  background: none;
}

.nav-links {
  display: flex; align-items: center; gap: 24px;
  list-style: none;
}

.nav-links a {
  font-size: .825rem; font-weight: 500;
  color: var(--text-2); text-decoration: none;
  transition: color var(--transition);
  letter-spacing: -.005em;
}

.nav-links a:hover { color: var(--text); }

.nav-right { display: flex; align-items: center; gap: 10px; }

/* ─── Theme Toggle ─── */
.theme-toggle {
  width: 72px; height: 34px;
  background: var(--bg2);
  border: 1.5px solid var(--border-strong);
  border-radius: 34px;
  cursor: pointer; position: relative;
  transition: background var(--transition), border-color var(--transition);
  flex-shrink: 0;
  display: flex; align-items: center;
  padding: 0 6px;
  justify-content: space-between;
}

.theme-toggle::after {
  content: '';
  position: absolute; top: 4px; left: 4px;
  width: 24px; height: 24px;
  background: var(--surface);
  border-radius: 50%;
  transition: transform var(--transition);
  box-shadow: 0 1px 4px rgba(0,0,0,.18);
  z-index: 1;
}

[data-theme="dark"] .theme-toggle {
  background: #1e2a3a;
  border-color: #2d3f55;
}
[data-theme="dark"] .theme-toggle::after {
  transform: translateX(36px);
  background: #2a3f5a;
}

.theme-icon {
  display: flex; align-items: center; justify-content: center;
  width: 20px; height: 20px;
  position: relative; z-index: 0;
  pointer-events: none;
  color: var(--muted);
  flex-shrink: 0;
}

.theme-icon svg { width: 13px; height: 13px; }

[data-theme="dark"] .theme-icon.moon { color: #7ab3e8; }
[data-theme="light"] .theme-icon.sun { color: #e8a020; }

/* ─── Hero ─── */
.hero {
  max-width: 1160px; margin: 0 auto;
  padding: 88px 28px 72px;
  display: flex; flex-direction: column; align-items: center;
  gap: 48px; text-align: center;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-mid);
  padding: 4px 12px; border-radius: 100px;
  font-size: .72rem; font-weight: 600; letter-spacing: .06em;
  text-transform: uppercase; margin-bottom: 22px;
}

.hero-badge::before { content: ''; width: 5px; height: 5px; background: var(--accent); border-radius: 50%; }

h1 {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 400; line-height: 1.1;
  letter-spacing: -.01em;
  margin-bottom: 20px;
  color: var(--text);
}

h1 em {
  font-style: italic;
  color: var(--accent);
}

h1 .highlight {
  color: var(--accent);
  position: relative; display: inline-block;
}

h1 .highlight::after {
  content: '';
  position: absolute; bottom: -2px; left: 0; right: 0;
  height: 2px; background: var(--accent);
  border-radius: 2px; opacity: .25;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-2);
  margin-bottom: 36px;
  max-width: 480px;
  margin-left: auto; margin-right: auto;
  line-height: 1.7;
  font-weight: 400;
}

.hero-stats {
  display: flex; gap: 0;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
  justify-content: center;
}

.stat {
  text-align: center;
  padding: 0 32px;
  border-right: 1px solid var(--border);
}

.stat:last-child { border-right: none; }

.stat-num {
  font-family: var(--font-head);
  font-size: 1.7rem; font-weight: 400; color: var(--text);
  line-height: 1;
  letter-spacing: -.02em;
}
.stat-label { font-size: .775rem; color: var(--muted); margin-top: 3px; font-weight: 500; letter-spacing: .01em; }

/* ─── Upload Area ─── */
.upload-area {
  width: 100%;
  max-width: 540px;
}

/* ─── Upload Card ─── */
.upload-card {
  background: var(--surface);
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 52px 36px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-sm);
}

.upload-card:hover, .upload-card.drag-over {
  border-color: var(--accent);
  border-style: solid;
  background: var(--accent-dim);
  box-shadow: var(--shadow), 0 0 0 4px var(--accent-dim);
}

.upload-icon {
  width: 80px; height: 80px; margin: 0 auto 20px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  border: none;
  background: none;
}

.upload-title {
  font-family: var(--font-body);
  font-size: 1.05rem; font-weight: 600; margin-bottom: 6px;
  color: var(--text);
  letter-spacing: -.015em;
}

.upload-sub { font-size: .825rem; color: var(--muted); margin-bottom: 22px; }

.upload-btn {
  display: inline-block;
  background: var(--accent); color: white;
  padding: 11px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: .9rem; font-weight: 500;
  border: none; cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  letter-spacing: -.01em;
  margin-bottom: 14px;
}

.upload-btn:hover { opacity: .87; transform: translateY(-1px); }

.file-types { font-size: .75rem; color: var(--muted); }

/* ─── Quality Selector ─── */
.quality-selector {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-top: 16px;
  box-shadow: var(--shadow-sm);
}

.quality-label {
  font-size: .8rem; font-weight: 600;
  color: var(--text-2);
  margin-bottom: 14px;
  display: block;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.quality-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.quality-opt {
  position: relative;
}

.quality-opt input[type="radio"] {
  position: absolute; opacity: 0; width: 0; height: 0;
}

.quality-opt label {
  display: flex; flex-direction: column; align-items: center;
  padding: 12px 8px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-2);
  text-align: center;
  gap: 4px;
  background: var(--bg);
}

.quality-opt label .q-name {
  font-weight: 600;
  color: var(--text);
  font-size: .85rem;
}

.quality-opt label .q-desc {
  font-size: .72rem;
  color: var(--muted);
}

.quality-opt input:checked + label {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}

.quality-opt input:checked + label .q-name {
  color: var(--accent);
}

.quality-opt label:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* ─── Progress Section ─── */
.progress-wrap {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.progress-wrap.active { display: block; }

.progress-bar-bg {
  background: var(--bg2);
  border-radius: 100px;
  height: 6px;
  margin: 20px 0 10px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 100px;
  transition: width .3s var(--ease);
  width: 0%;
}

/* ─── Result Section ─── */
.result-wrap {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.result-wrap.active { display: block; }

.result-icon {
  width: 56px; height: 56px;
  background: #f0fdf4;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
}

[data-theme="dark"] .result-icon { background: #0a2010; }

.result-title {
  font-family: var(--font-head);
  font-size: 1.5rem; font-weight: 400;
  margin-bottom: 8px;
}

.result-stats {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin: 20px 0 24px;
  flex-wrap: wrap;
}

.result-stat {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: .825rem;
  color: var(--text-2);
  min-width: 120px;
}

.result-stat .rs-num {
  font-family: var(--font-head);
  font-size: 1.3rem;
  color: var(--text);
  display: block;
  line-height: 1.1;
}

.result-stat.saved .rs-num { color: #16a34a; }

[data-theme="dark"] .result-stat.saved .rs-num { color: #4ade80; }

.download-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: white;
  padding: 13px 32px; border-radius: var(--radius-sm);
  font-weight: 500; font-size: .95rem;
  font-family: var(--font-body);
  text-decoration: none;
  letter-spacing: -.01em;
  transition: opacity var(--transition), transform var(--transition);
  margin-bottom: 12px;
}

.download-btn:hover { opacity: .85; transform: translateY(-1px); }

.convert-another-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: none;
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 11px 24px; border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: .875rem; font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: -.01em;
  margin-left: 8px;
}

.convert-another-btn:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

/* ─── Section ─── */
.section {
  max-width: 1160px; margin: 0 auto;
  padding: 80px 28px;
}

.section-label {
  font-size: .72rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 400;
  color: var(--text);
  letter-spacing: -.01em;
  margin-bottom: 14px;
}

.section-sub {
  color: var(--text-2);
  font-size: .95rem;
  max-width: 520px;
  line-height: 1.7;
}

/* ─── Features Grid ─── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 52px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow var(--transition), border-color var(--transition);
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--accent-mid);
}

.feature-icon {
  width: 44px; height: 44px;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  color: var(--accent);
}

.feature-title {
  font-weight: 600; font-size: .95rem;
  margin-bottom: 8px;
  letter-spacing: -.01em;
}

.feature-desc { font-size: .85rem; color: var(--text-2); line-height: 1.65; }

/* ─── Steps ─── */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 52px;
}

.step {
  background: var(--bg2);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--border);
}

.step-num {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent-dim);
  border: 1px solid var(--accent-mid);
  border-radius: 50%;
  font-family: var(--font-body);
  font-size: .8rem; font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
}

.step-title {
  font-family: var(--font-body);
  font-weight: 600; font-size: 1rem;
  margin-bottom: 8px;
  letter-spacing: -.01em;
}

.step-desc { font-size: .85rem; color: var(--text-2); line-height: 1.65; }

/* ─── FAQ ─── */
.faq { margin-top: 48px; display: flex; flex-direction: column; }

.faq-item {
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.faq-item:first-child { border-top: 1px solid var(--border); }

.faq-q {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 0; cursor: pointer;
  font-weight: 500; font-size: .9rem;
  gap: 16px;
  transition: color var(--transition);
}

.faq-item.open .faq-q { color: var(--accent); }

.faq-chevron {
  flex-shrink: 0;
  color: var(--muted);
  font-size: .65rem;
  transition: transform var(--transition), color var(--transition);
  line-height: 1;
}

.faq-item.open .faq-chevron { transform: rotate(180deg); color: var(--accent); }

.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .4s var(--ease);
  font-size: .875rem; color: var(--text-2); line-height: 1.75;
}

.faq-item.open .faq-a { max-height: 240px; }
.faq-a-inner { padding: 0 0 20px; }

/* ─── CTA Banner ─── */
.cta-banner {
  background: var(--text);
  color: white; text-align: center;
  padding: 80px 28px;
}

[data-theme="dark"] .cta-banner { background: var(--surface); border-top: 1px solid var(--border); }

.cta-banner h2 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 400; margin-bottom: 14px;
  letter-spacing: -.01em;
}

.cta-banner p { opacity: .65; font-size: 1rem; margin-bottom: 36px; }

.cta-btn-white {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: white;
  padding: 13px 32px; border-radius: var(--radius-sm);
  font-weight: 500; font-size: .95rem;
  font-family: var(--font-body);
  text-decoration: none; cursor: pointer;
  border: none; letter-spacing: -.01em;
  transition: opacity var(--transition), transform var(--transition);
}

.cta-btn-white:hover { opacity: .85; transform: translateY(-1px); }

/* ─── Footer ─── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 56px 28px 28px;
}

.footer-inner {
  max-width: 1160px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: .825rem; color: var(--muted);
  margin-top: 12px; max-width: 240px;
  line-height: 1.7;
}

.footer-col h4 {
  font-family: var(--font-body);
  font-weight: 600; font-size: .75rem;
  letter-spacing: .07em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 16px;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }

.footer-col a {
  font-size: .825rem; color: var(--text-2);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--text); }

.footer-bottom {
  max-width: 1160px; margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  font-size: .775rem; color: var(--muted);
  flex-wrap: wrap; gap: 10px;
}

/* ─── Inner Pages ─── */
.page-hero {
  border-bottom: 1px solid var(--border);
  padding: 72px 28px;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  margin-bottom: 14px;
}

.page-hero p { color: var(--text-2); font-size: 1rem; }

.page-content {
  max-width: 720px; margin: 72px auto;
  padding: 0 28px;
}

.page-content h2 {
  font-family: var(--font-head);
  font-size: 1.5rem; font-weight: 400;
  margin: 44px 0 14px;
  color: var(--text);
  letter-spacing: -.01em;
}

.page-content h2:first-child { margin-top: 0; }

.page-content p {
  color: var(--text-2); font-size: .9rem;
  line-height: 1.8; margin-bottom: 16px;
}

.page-content ul {
  color: var(--text-2); font-size: .9rem;
  line-height: 1.8; margin-bottom: 16px;
  padding-left: 18px;
}

.page-content ul li { margin-bottom: 8px; }

/* ─── Contact ─── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 56px; align-items: start;
}

.contact-info { display: flex; flex-direction: column; gap: 20px; }

.contact-item {
  display: flex; gap: 14px; align-items: flex-start;
}

.contact-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: var(--bg2);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  border: 1px solid var(--border);
}

.contact-item h4 { font-weight: 600; margin-bottom: 3px; font-size: .9rem; }
.contact-item p { font-size: .825rem; color: var(--text-2); }

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block; font-size: .8rem; font-weight: 600;
  margin-bottom: 7px; color: var(--text);
  letter-spacing: -.005em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: .875rem;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--muted); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-group textarea { resize: vertical; min-height: 110px; }

.form-submit {
  width: 100%; padding: 12px;
  background: var(--accent); color: white;
  border: none; border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 500; font-size: .925rem;
  cursor: pointer; letter-spacing: -.01em;
  transition: opacity var(--transition), transform var(--transition);
}

.form-submit:hover { opacity: .85; transform: translateY(-1px); }

.success-msg {
  background: #f0fdf4; color: #15803d;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm); padding: 11px 14px;
  font-size: .825rem; margin-top: 12px; display: none;
}

/* ─── Utilities ─── */
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.divider { height: 1px; background: var(--border); max-width: 1160px; margin: 0 auto; }

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  /* ── Nav ── */
  .nav-inner { padding: 0 16px; height: 56px; }
  .nav-links { display: none; }
  .logo { font-size: .9rem; }
  .logo-icon { width: 28px; height: 28px; }
  .logo-icon svg { width: 28px; height: 28px; }

  /* ── Hero ── */
  .hero { padding: 40px 16px 48px; gap: 32px; }
  h1 { font-size: clamp(2rem, 9vw, 2.6rem); }
  .hero-desc { font-size: .9rem; margin-bottom: 24px; }
  .hero-badge { font-size: .68rem; }

  /* ── Stats ── */
  .hero-stats { gap: 0; flex-wrap: nowrap; }
  .stat { padding: 0 16px; }
  .stat-num { font-size: 1.3rem; }
  .stat-label { font-size: .7rem; }

  /* ── Upload ── */
  .upload-area { max-width: 100%; }
  .upload-card { padding: 36px 20px; }
  .upload-icon { width: 64px; height: 64px; }
  .upload-icon svg { width: 48px; height: 48px; }
  .upload-title { font-size: .95rem; }
  .upload-btn { padding: 10px 22px; font-size: .85rem; width: 100%; }

  /* ── Quality selector ── */
  .quality-selector { padding: 16px; }
  .quality-options { grid-template-columns: 1fr; gap: 6px; }
  .quality-opt label { flex-direction: row; justify-content: flex-start; padding: 10px 14px; gap: 10px; }
  .quality-opt label .q-desc { margin-left: auto; }

  /* ── Progress / Result ── */
  .progress-wrap { padding: 28px 20px; }
  .result-wrap { padding: 28px 20px; }
  .result-stats { gap: 8px; flex-direction: column; align-items: center; }
  .result-stat { min-width: 0; width: 100%; max-width: 260px; }
  .download-btn { width: 100%; justify-content: center; }
  .convert-another-btn { width: 100%; justify-content: center; margin-left: 0; margin-top: 8px; }

  /* ── Sections ── */
  .section { padding: 48px 16px; }
  .section-title { font-size: clamp(1.6rem, 6vw, 2rem); }
  .features-grid { grid-template-columns: 1fr; margin-top: 32px; }
  .steps { grid-template-columns: 1fr; margin-top: 32px; }
  .step { padding: 24px 18px; }

  /* ── CTA Banner ── */
  .cta-banner { padding: 48px 16px; }
  .cta-banner h2 { font-size: clamp(1.7rem, 6vw, 2.2rem); }
  .cta-btn-white { width: 100%; justify-content: center; }

  /* ── Footer ── */
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  footer { padding: 40px 16px 80px; } /* extra bottom padding for sticky ad */
  .footer-bottom { flex-direction: column; text-align: center; gap: 6px; }
  .page-hero { padding: 40px 16px; }

  /* ── Contact ── */
  .contact-form { padding: 24px 18px; }

  /* ── Sticky ad bar — give body some bottom breathing room ── */
  body { padding-bottom: 72px; }
}

/* ── Hamburger menu for mobile ── */
.nav-hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  cursor: pointer;
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1;
}

@media (max-width: 640px) {
  .nav-hamburger { display: flex; align-items: center; }
}

.nav-mobile-menu {
  display: none;
  position: fixed;
  top: 56px; left: 0; right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: 99;
  padding: 12px 0 16px;
}

.nav-mobile-menu.open { display: block; }

.nav-mobile-menu ul {
  list-style: none;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-mobile-menu ul li a {
  display: block;
  padding: 12px 8px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}

.nav-mobile-menu ul li a:hover {
  background: var(--bg2);
  color: var(--text);
}

/* ─── Animations ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes spin { to { transform: rotate(360deg); } }

.fade-up { animation: fadeUp .55s var(--ease) both; }
.fade-up-1 { animation-delay: .06s; }
.fade-up-2 { animation-delay: .14s; }
.fade-up-3 { animation-delay: .22s; }
.fade-up-4 { animation-delay: .30s; }

/* ─── File Input Hidden ─── */
#file-input { display: none; }