/* ===== pdftotext.site — Premium Design System ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-hero: linear-gradient(135deg, #0f172a 0%, #1e1b4b 40%, #312e81 70%, #0f172a 100%);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent-1: #6366f1;
  --accent-2: #8b5cf6;
  --accent-3: #06b6d4;
  --border: #e2e8f0;
  --glass-bg: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.15);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.15);
  --radius: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #0b0f1a;
  --bg-secondary: #111827;
  --bg-card: #1e2235;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #1e293b;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.5);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

/* ===== ANIMATED HERO ===== */
.hero {
  background: var(--bg-hero);
  position: relative;
  overflow: hidden;
  padding: 80px 24px 100px;
  text-align: center;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(99,102,241,0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 50%, rgba(6,182,212,0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 80%, rgba(139,92,246,0.1) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}
@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-3%, 2%) scale(1.05); }
  100% { transform: translate(3%, -2%) scale(1); }
}
.hero * { position: relative; z-index: 1; }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.hero h1 .gradient-text {
  background: linear-gradient(135deg, #818cf8, #06b6d4, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: rgba(255,255,255,0.7);
  max-width: 680px;
  margin: 0 auto 32px;
  font-weight: 400;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
}
.hero-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  color: rgba(255,255,255,0.9);
  font-size: 0.85rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  transition: transform var(--transition), background var(--transition);
}
.hero-badge:hover { transform: translateY(-2px); background: rgba(255,255,255,0.12); }
.hero-badge svg { width: 16px; height: 16px; color: #34d399; }
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: #fff;
  border: none;
  border-radius: 14px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 25px rgba(99,102,241,0.4);
}
.hero-cta:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 8px 35px rgba(99,102,241,0.5); }

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px);
  transition: background var(--transition), border var(--transition);
}
[data-theme="dark"] .header { background: rgba(17,24,39,0.85); }
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-3));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
}
.logo-text {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text-primary);
}
.logo-text span { color: var(--accent-1); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}
.nav-links a {
  padding: 8px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--accent-1); background: rgba(99,102,241,0.08); }
.theme-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  color: var(--text-secondary);
}
.theme-toggle:hover { border-color: var(--accent-1); color: var(--accent-1); }

/* ===== TOOL GRID ===== */
.section { max-width: 1200px; margin: 0 auto; padding: 60px 24px; }
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.section-sub {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-3));
  opacity: 0;
  transition: opacity var(--transition);
}
.tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent-1); }
.tool-card:hover::before { opacity: 1; }
.tool-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.5rem;
}
.tool-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.tool-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }
.tool-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 12px;
}
.badge-popular { background: rgba(34,197,94,0.1); color: #16a34a; }
.badge-new { background: rgba(99,102,241,0.1); color: #6366f1; }
.badge-ocr { background: rgba(245,158,11,0.1); color: #d97706; }

/* ===== CONVERTER / UPLOADER ===== */
.converter {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-md);
  margin-bottom: 48px;
}
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-primary);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.dropzone:hover, .dropzone.drag {
  border-color: var(--accent-1);
  background: rgba(99,102,241,0.04);
  transform: translateY(-2px);
}
.dropzone-icon { font-size: 3rem; margin-bottom: 12px; opacity: 0.5; }
.dropzone p { color: var(--text-secondary); font-size: 0.9rem; }
.btn {
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 15px rgba(99,102,241,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99,102,241,0.4); }
.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent-1); color: var(--accent-1); }
.btn-success {
  background: linear-gradient(135deg, #059669, #34d399);
  color: #fff;
  box-shadow: 0 4px 15px rgba(5,150,105,0.3);
}
.btn-success:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(5,150,105,0.4); }
.btn-danger { background: rgba(239,68,68,0.1); color: #ef4444; border: 1px solid rgba(239,68,68,0.2); }
.btn-danger:hover { background: rgba(239,68,68,0.15); }
.btn-group { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.progress-bar { height: 6px; background: var(--bg-primary); border-radius: 100px; overflow: hidden; margin: 16px 0 8px; }
.progress-fill { height: 100%; border-radius: 100px; background: linear-gradient(90deg, var(--accent-1), var(--accent-3)); width: 0%; transition: width 0.3s ease; }
.progress-text { font-size: 0.8rem; color: var(--text-muted); }
.form-select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border var(--transition);
}
.form-select:focus { outline: none; border-color: var(--accent-1); }
.form-label { font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; display: block; text-transform: uppercase; letter-spacing: 0.05em; }
.textarea {
  width: 100%;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  resize: vertical;
  min-height: 200px;
  transition: border var(--transition);
}
.textarea:focus { outline: none; border-color: var(--accent-1); }

/* ===== PRIVACY COMPARISON ===== */
.privacy-section { background: var(--bg-secondary); border-radius: var(--radius); padding: 48px 32px; border: 1px solid var(--border); }
.privacy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 32px; }
.privacy-card {
  border-radius: 14px;
  padding: 28px;
  position: relative;
}
.privacy-bad { background: rgba(239,68,68,0.06); border: 1px solid rgba(239,68,68,0.15); }
.privacy-good { background: rgba(34,197,94,0.06); border: 1px solid rgba(34,197,94,0.15); }
.privacy-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.privacy-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.privacy-step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}
.privacy-bad .privacy-step-num { background: rgba(239,68,68,0.15); color: #ef4444; }
.privacy-good .privacy-step-num { background: rgba(34,197,94,0.15); color: #16a34a; }

/* ===== CONVERSION HISTORY ===== */
.history-section { margin-top: 24px; }
.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--bg-primary);
  margin-bottom: 8px;
  font-size: 0.85rem;
  transition: background var(--transition);
}
.history-item:hover { background: rgba(99,102,241,0.06); }
.history-name { font-weight: 600; color: var(--text-primary); }
.history-meta { color: var(--text-muted); font-size: 0.75rem; }

/* ===== STATS ===== */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 48px;
  padding: 32px 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-num { font-size: 1.5rem; font-weight: 800; color: var(--accent-1); }
.stat-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-top: 2px; }

/* ===== FEATURES ===== */
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all var(--transition);
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}
.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 0.88rem; color: var(--text-secondary); }

/* ===== FAQ ===== */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 10px;
  overflow: hidden;
  transition: border var(--transition);
}
.faq-item:hover { border-color: var(--accent-1); }
.faq-q {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-q::after { content: '+'; font-size: 1.2rem; color: var(--text-muted); transition: transform var(--transition); }
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 18px; }

/* ===== FOOTER ===== */
.footer {
  background: #0b0f1a;
  color: #94a3b8;
  padding: 60px 24px 32px;
  margin-top: 60px;
}
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer h4 { color: #fff; font-size: 0.85rem; font-weight: 700; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.08em; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 8px; }
.footer a { color: #94a3b8; text-decoration: none; font-size: 0.85rem; transition: color var(--transition); }
.footer a:hover { color: #fff; }
.footer-bottom { max-width: 1200px; margin: 0 auto; padding-top: 24px; border-top: 1px solid #1e293b; text-align: center; font-size: 0.8rem; }

/* ===== MOBILE MENU ===== */
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); margin: 5px 0; transition: all 0.3s; border-radius: 2px; }
.hamburger.active span:nth-child(1) { transform: rotate(-45deg) translate(-5px, 6px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(45deg) translate(-5px, -6px); }
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: var(--bg-secondary);
  z-index: 200;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  box-shadow: -10px 0 40px rgba(0,0,0,0.15);
}
.mobile-menu.active { transform: translateX(0); }
.mobile-menu-inner { padding: 24px; }
.mobile-menu a {
  display: block;
  padding: 12px 16px;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  border-radius: 8px;
  transition: background var(--transition);
  font-size: 0.9rem;
}
.mobile-menu a:hover { background: rgba(99,102,241,0.08); }
.mobile-menu .menu-section { font-size: 0.7rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; padding: 16px 16px 4px; }
.mobile-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 199; display: none; }
.mobile-backdrop.active { display: block; }

/* ===== DROPDOWN ===== */
.dropdown { position: relative; }
.dropdown-trigger { cursor: pointer; display: flex; align-items: center; gap: 4px; }
.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 8px;
  z-index: 50;
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a { display: block; padding: 8px 14px; border-radius: 6px; color: var(--text-secondary); text-decoration: none; font-size: 0.85rem; transition: all var(--transition); }
.dropdown-menu a:hover { background: rgba(99,102,241,0.08); color: var(--accent-1); }
.dropdown-divider { height: 1px; background: var(--border); margin: 4px 0; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .hamburger { display: block; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero { padding: 60px 16px 80px; }
  .section { padding: 40px 16px; }
  .privacy-grid { grid-template-columns: 1fr; }
  .stats-bar { gap: 24px; flex-wrap: wrap; }
  .converter { padding: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .tool-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .tool-card { padding: 20px 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .btn-group { flex-direction: column; }
  .btn-group .btn { width: 100%; justify-content: center; }
}
@media (max-width: 480px) {
  .tool-grid { grid-template-columns: 1fr; }
}

/* ===== PREVIEW / THUMBNAILS ===== */
#previewImg { max-height: 300px; object-fit: contain; border-radius: 10px; width: 100%; display: none; }
#thumbnails { display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: 10px; }
#thumbnails canvas { width: 100%; border-radius: 6px; cursor: pointer; border: 2px solid var(--border); transition: border var(--transition); }
#thumbnails canvas:hover { border-color: var(--accent-1); }

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 20px;
  box-shadow: var(--shadow-lg);
  font-size: 0.85rem;
  z-index: 300;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}
.toast.show { transform: translateY(0); opacity: 1; }