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

/* ══════════════════════════════════════════════════
   DESIGN TOKENS — Sistema de diseño unificado
══════════════════════════════════════════════════ */
:root {
  --bg: #f0f4f8;
  --surface: rgba(255,255,255,0.9);
  --glass-border: rgba(255,255,255,0.6);
  --glass-glow: rgba(25,91,139,0.04);
  --primary: #195B8B;
  --primary-dark: #0B3660;
  --primary-light: #2d7abf;
  --text: #0f172a;
  --muted: #64748b;
  --border: #dde3ec;
  --accent: #10b981;
  --accent-dark: #059669;
  --success: #059669;
  --danger: #ef4444;
  --ad-bg: rgba(241,245,249,0.5);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-xs: 0 1px 4px rgba(15,23,42,0.06);
  --shadow: 0 4px 20px rgba(15,23,42,0.08);
  --shadow-lg: 0 12px 40px rgba(15,23,42,0.12);
  --shadow-primary: 0 8px 28px rgba(25,91,139,0.18);
  --transition: all 0.22s cubic-bezier(0.4,0,0.2,1);
}

/* ══════════════════════════════════════════════════
   BASE
══════════════════════════════════════════════════ */
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: linear-gradient(145deg, #e8eef5 0%, #f5f8fc 55%, #edf2f7 100%);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  font-feature-settings: "kern" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ══════════════════════════════════════════════════
   AD SLOTS
══════════════════════════════════════════════════ */
.ad-slot {
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  overflow: hidden;
}

/* ══════════════════════════════════════════════════
   HEADER — Glass premium
══════════════════════════════════════════════════ */
header {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255,255,255,0.5);
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(15,23,42,0.06), 0 4px 16px rgba(15,23,42,0.04);
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 0;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  white-space: nowrap;
  letter-spacing: -0.3px;
}

.logo span { font-size: 26px; }

/* ── Nav links ── */
.nav-links-header {
  display: flex;
  gap: 6px;
  align-items: center;
}

.nav-links-header a {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 8px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-links-header a:hover {
  color: var(--primary);
  background: rgba(25,91,139,0.07);
}

.ad-header { width: 468px; height: 60px; max-width: 100%; flex-shrink: 1; }

/* ── Login button ── */
.btn-login {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 9px 18px;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(25,91,139,0.22);
  letter-spacing: -0.1px;
}

.btn-login:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 20px rgba(25,91,139,0.32);
  transform: translateY(-1px);
}

.btn-login:active { transform: scale(0.97); }
.btn-login img { width: 17px; height: 17px; }

/* ── User panel ── */
.user-panel {
  display: none;
  align-items: center;
  gap: 10px;
  position: relative;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2.5px solid var(--primary);
  cursor: pointer;
  object-fit: cover;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(25,91,139,0.2);
}

.user-avatar:hover { transform: scale(1.06); box-shadow: 0 4px 14px rgba(25,91,139,0.3); }

.user-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -0.1px;
}

/* ── Dropdown ── */
.user-dropdown {
  position: absolute;
  top: 52px;
  right: 0;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 6px;
  min-width: 190px;
  display: none;
  z-index: 200;
  animation: dropIn 0.18s cubic-bezier(0.4,0,0.2,1);
}

@keyframes dropIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.user-dropdown.open { display: block; }

.dropdown-item {
  padding: 9px 13px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 9px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  transition: var(--transition);
}

.dropdown-item:hover { background: var(--bg); color: var(--primary); }
.dropdown-item svg { opacity: 0.6; }
.dropdown-item:hover svg { opacity: 1; }
.dropdown-item.danger { color: #dc2626; }
.dropdown-item.danger:hover { background: rgba(220,38,38,0.06); color: #dc2626; }

/* ══════════════════════════════════════════════════
   LAYOUT
══════════════════════════════════════════════════ */
.wrapper {
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px 24px;
  display: grid;
  grid-template-columns: 1fr 160px;
  gap: 28px;
}

.main { display: flex; flex-direction: column; gap: 20px; }
.sidebar { display: flex; flex-direction: column; gap: 16px; }
.ad-side { width: 160px; height: 600px; }
.ad-side2 { width: 160px; height: 300px; }

/* ══════════════════════════════════════════════════
   CARDS — Glass morphism premium
══════════════════════════════════════════════════ */
.card {
  background: var(--surface);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px;
  transition: var(--transition);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(145deg, rgba(255,255,255,0.3) 0%, transparent 60%);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card h2 {
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ══════════════════════════════════════════════════
   DROP ZONE
══════════════════════════════════════════════════ */
.drop-zone {
  border: 2px dashed rgba(25,91,139,0.35);
  border-radius: 14px;
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: linear-gradient(135deg, rgba(25,91,139,0.02), rgba(25,91,139,0.05));
  position: relative;
  overflow: hidden;
}

.drop-zone::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(25,91,139,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.drop-zone:hover, .drop-zone.drag {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(25,91,139,0.06), rgba(25,91,139,0.1));
  transform: scale(1.005);
}

.drop-zone .icon { font-size: 40px; margin-bottom: 8px; }
.drop-zone p { color: var(--muted); font-size: 13.5px; margin-top: 6px; line-height: 1.6; }
.drop-zone strong { color: var(--primary); font-size: 15px; font-weight: 700; }

#fileInput { display: none; }

/* ══════════════════════════════════════════════════
   STATUS BAR
══════════════════════════════════════════════════ */
.status-bar {
  background: var(--bg);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 14px;
  border: 1px solid var(--border);
  font-weight: 500;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
  transition: background 0.3s;
}

.dot.active { background: var(--primary); animation: pulse 1.2s ease-in-out infinite; }
.dot.done   { background: var(--success); }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.85); }
}

/* ══════════════════════════════════════════════════
   PROGRESS BARS
══════════════════════════════════════════════════ */
.progress-wrap {
  background: var(--border);
  border-radius: 99px;
  height: 5px;
  margin-top: 8px;
  overflow: hidden;
  display: none;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 99px;
  transition: width 0.35s ease;
  width: 0;
  box-shadow: 0 0 6px rgba(25,91,139,0.4);
}

/* ══════════════════════════════════════════════════
   USER INFO CARD
══════════════════════════════════════════════════ */
.user-info-card {
  background: linear-gradient(135deg, rgba(239,246,255,0.9), rgba(245,243,255,0.9));
  border: 1px solid rgba(196,181,253,0.4);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: none;
  align-items: center;
  gap: 16px;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(99,102,241,0.08);
}

.user-info-card.visible { display: flex; }

.uic-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 2.5px solid var(--primary);
  box-shadow: 0 4px 12px rgba(25,91,139,0.2);
  flex-shrink: 0;
}

.uic-text p { font-size: 12px; color: var(--muted); margin-bottom: 2px; font-weight: 500; }
.uic-text strong { font-size: 15px; color: var(--text); font-weight: 700; letter-spacing: -0.2px; }

.uic-badge {
  margin-left: auto;
  background: linear-gradient(135deg, #dbeafe, #e0e7ff);
  color: #1d4ed8;
  font-size: 10.5px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 99px;
  border: 1px solid rgba(99,102,241,0.2);
}

.uic-buttons { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }

/* ══════════════════════════════════════════════════
   ADS
══════════════════════════════════════════════════ */
.ads-rect-row { display: flex; gap: 16px; align-items: flex-start; justify-content: center; }

/* ══════════════════════════════════════════════════
   VOICE CONTROLS
══════════════════════════════════════════════════ */
.controls-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

label.ctrl-label {
  font-size: 11px;
  color: var(--muted);
  font-weight: 700;
  display: block;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

select, input[type=range] {
  width: 100%;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 13px;
  background: rgba(255,255,255,0.8);
  color: var(--text);
  outline: none;
  transition: var(--transition);
  font-family: inherit;
}

select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(25,91,139,0.1); }

input[type=range] {
  padding: 0;
  height: 6px;
  cursor: pointer;
  accent-color: var(--primary);
  border: none;
  background: none;
}

.speed-val {
  font-size: 12px;
  color: var(--primary);
  font-weight: 700;
  margin-left: 4px;
  background: rgba(25,91,139,0.08);
  padding: 1px 6px;
  border-radius: 5px;
}

/* ══════════════════════════════════════════════════
   PLAYER — Premium dark glass
══════════════════════════════════════════════════ */
.player {
  background: linear-gradient(145deg, rgba(9,50,90,0.97), rgba(25,91,139,0.95));
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius);
  padding: 24px;
  color: #fff;
  box-shadow: 0 16px 48px rgba(9,50,90,0.3), 0 0 0 1px rgba(255,255,255,0.05) inset;
  transition: var(--transition);
  position: sticky;
  top: 90px;
  z-index: 99;
  overflow: hidden;
}

.player::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
}

.player-title { font-size: 10.5px; opacity: 0.55; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.1em; font-weight: 600; }
.player-file  { font-size: 14.5px; font-weight: 700; margin-bottom: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; letter-spacing: -0.2px; }
.player-user  { font-size: 11.5px; opacity: 0.55; margin-bottom: 16px; }

.timeline {
  position: relative;
  height: 5px;
  background: rgba(255,255,255,0.18);
  border-radius: 99px;
  cursor: pointer;
  margin-bottom: 10px;
  transition: height 0.15s;
}

.timeline:hover { height: 7px; }

.timeline-fill {
  position: absolute;
  left: 0; top: 0;
  height: 100%;
  background: linear-gradient(90deg, rgba(255,255,255,0.9), #fff);
  border-radius: 99px;
  pointer-events: none;
  transition: width 0.12s;
}

.time-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  opacity: 0.6;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.player-btns { display: flex; align-items: center; gap: 12px; }

.btn-circle {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.12);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.btn-circle:hover {
  background: rgba(255,255,255,0.24);
  border-color: rgba(255,255,255,0.24);
  transform: scale(1.06);
}

.btn-circle.primary {
  background: #fff;
  color: var(--primary);
  width: 52px;
  height: 52px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
  border: none;
}

.btn-circle.primary:hover {
  background: #f0f6ff;
  transform: scale(1.08);
  box-shadow: 0 8px 24px rgba(0,0,0,0.28);
}

.btn-export {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
}

.btn-export:hover {
  background: rgba(255,255,255,0.22);
  transform: translateY(-1px);
}

.cloud-sync {
  font-size: 10.5px;
  opacity: 0.6;
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ══════════════════════════════════════════════════
   TEXT BOX
══════════════════════════════════════════════════ */
.text-box {
  background: rgba(248,250,252,0.8);
  border-radius: 10px;
  padding: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
  max-height: 220px;
  overflow-y: auto;
  border: 1.5px solid var(--border);
  white-space: pre-wrap;
  transition: border-color 0.2s;
}

.text-box::-webkit-scrollbar { width: 4px; }
.text-box::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ══════════════════════════════════════════════════
   BUTTONS
══════════════════════════════════════════════════ */
.btn {
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
  letter-spacing: -0.1px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(25,91,139,0.22);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(25,91,139,0.35);
  transform: translateY(-1px);
}

.btn-primary:active { transform: scale(0.97); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-ai {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  font-family: inherit;
  box-shadow: 0 4px 14px rgba(16,185,129,0.2);
}

.btn-ai:hover {
  box-shadow: 0 6px 20px rgba(16,185,129,0.35);
  transform: translateY(-1px);
}

.btn-ai:disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }

/* ══════════════════════════════════════════════════
   SUMMARY BOX
══════════════════════════════════════════════════ */
.summary-box {
  background: linear-gradient(135deg, rgba(250,245,255,0.95), rgba(245,243,255,0.95));
  border: 1.5px solid rgba(196,181,253,0.4);
  border-radius: 12px;
  padding: 18px;
  font-size: 13.5px;
  line-height: 1.8;
  color: #2d1b69;
  max-height: 300px;
  overflow-y: auto;
  display: none;
  margin-top: 14px;
  backdrop-filter: blur(8px);
}

.summary-box.visible { display: block; animation: fadeUp 0.3s ease; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.key-point {
  background: rgba(196,181,253,0.2);
  border-left: 3px solid var(--accent);
  padding: 7px 12px;
  border-radius: 0 8px 8px 0;
  margin: 8px 0;
  font-size: 13px;
  color: #2d1b69;
}

/* ══════════════════════════════════════════════════
   ADS SLOTS SIZES
══════════════════════════════════════════════════ */
.ad-banner { width: 100%; height: 90px; }
.ad-rect   { width: 300px; height: 250px; margin: 0 auto; }

/* ══════════════════════════════════════════════════
   REC BADGE
══════════════════════════════════════════════════ */
.rec-badge {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff;
  font-size: 10.5px;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 99px;
  display: none;
  align-items: center;
  gap: 5px;
  letter-spacing: 0.06em;
  box-shadow: 0 2px 8px rgba(239,68,68,0.35);
}

.rec-badge.visible { display: flex; }

/* ══════════════════════════════════════════════════
   FAQ SECTION
══════════════════════════════════════════════════ */
.faq-section {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.faq-section h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.4px;
}

.faq-section .faq-subtitle {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 28px;
  line-height: 1.6;
}

.faq-item {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
}

.faq-item:hover { box-shadow: var(--shadow); border-color: rgba(25,91,139,0.2); }
.faq-item.open  { border-color: rgba(25,91,139,0.25); box-shadow: 0 6px 24px rgba(25,91,139,0.1); }

.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 18px 22px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: inherit;
  transition: color 0.2s;
  letter-spacing: -0.1px;
}

.faq-question:hover { color: var(--primary); }

.faq-question .faq-icon {
  font-size: 18px;
  color: var(--primary);
  font-weight: 700;
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}

.faq-item.open .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1);
}

.faq-answer-inner {
  padding: 0 22px 20px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.faq-item.open .faq-answer { max-height: 400px; }

.faq-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 9.5px;
  font-weight: 800;
  padding: 2px 9px;
  border-radius: 99px;
  margin-left: 8px;
  vertical-align: middle;
  letter-spacing: 0.05em;
}

/* ══════════════════════════════════════════════════
   HOW TO USE
══════════════════════════════════════════════════ */
.how-section {
  max-width: 1240px;
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.how-inner { width: 100%; }

.how-inner > p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 32px;
  max-width: 560px;
  line-height: 1.75;
}

.how-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.4px;
}

.how-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.how-step {
  background: var(--surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1.5px solid var(--glass-border);
  border-radius: 16px;
  padding: 22px 20px;
  position: relative;
  transition: var(--transition);
  overflow: hidden;
}

.how-step::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity 0.2s;
}

.how-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-primary); }
.how-step:hover::before { opacity: 1; }

.how-step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(25,91,139,0.3);
}

.how-step-icon { font-size: 26px; margin-bottom: 10px; line-height: 1; }
.how-step h3   { font-size: 13.5px; font-weight: 700; color: var(--text); margin-bottom: 7px; letter-spacing: -0.1px; }
.how-step p    { font-size: 12.5px; color: var(--muted); line-height: 1.7; }
.how-connector { display: none; }

@media(max-width:900px) { .how-steps { grid-template-columns: repeat(2,1fr); } }
@media(max-width:540px) { .how-steps { grid-template-columns: 1fr; } }

/* ══════════════════════════════════════════════════
   BENEFITS
══════════════════════════════════════════════════ */
.benefits-section {
  max-width: 1240px;
  margin: 0 auto;
  padding: 40px 24px 24px;
}

.benefits-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.4px;
}

.benefits-sub {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 32px;
  max-width: 620px;
  line-height: 1.75;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 48px;
}

.benefit-card {
  background: var(--surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1.5px solid var(--glass-border);
  border-radius: 16px;
  padding: 24px 22px;
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.benefit-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.benefit-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-primary); }
.benefit-card:hover::after { transform: scaleX(1); }

.benefit-icon { font-size: 30px; margin-bottom: 12px; line-height: 1; }
.benefit-card h3 { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 9px; letter-spacing: -0.15px; }
.benefit-card p  { font-size: 13px; color: var(--muted); line-height: 1.75; }

@media(max-width:768px) { .benefits-grid { grid-template-columns: 1fr 1fr; } }
@media(max-width:500px) { .benefits-grid { grid-template-columns: 1fr; } }

/* ══════════════════════════════════════════════════
   ARTICLE
══════════════════════════════════════════════════ */
.article-section {
  background: var(--surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 56px 24px;
  margin-bottom: 8px;
}

.article-inner { max-width: 860px; margin: 0 auto; }
.article-inner h2 { font-size: 24px; font-weight: 800; color: var(--primary); margin-bottom: 18px; letter-spacing: -0.4px; }
.article-inner h3 { font-size: 16px; font-weight: 700; color: var(--text); margin: 32px 0 12px; letter-spacing: -0.2px; }
.article-inner p  { font-size: 14px; color: var(--muted); line-height: 1.9; margin-bottom: 16px; }
.article-inner ul { padding-left: 20px; margin-bottom: 16px; }
.article-inner ul li { font-size: 14px; color: var(--muted); line-height: 1.85; margin-bottom: 7px; }
.article-inner strong { color: var(--text); font-weight: 700; }

.article-tag {
  display: inline-block;
  background: rgba(25,91,139,0.1);
  color: var(--primary);
  font-size: 11px;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: 99px;
  margin-bottom: 18px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid rgba(25,91,139,0.2);
}

/* ══════════════════════════════════════════════════
   STATS
══════════════════════════════════════════════════ */
.stats-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 48px 24px;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(16,185,129,0.12) 0%, transparent 60%);
}

.stats-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
  position: relative;
}

.stat-item {}

.stat-num {
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  font-weight: 500;
  letter-spacing: 0.02em;
}

@media(max-width:640px) { .stats-inner { grid-template-columns: repeat(2,1fr); } }

/* ══════════════════════════════════════════════════
   COMMENTS
══════════════════════════════════════════════════ */
.comments-section { max-width: 820px; margin: 0 auto; padding: 56px 24px 28px; }
.comments-title { font-size: 24px; font-weight: 800; color: var(--primary); margin-bottom: 8px; text-align: center; letter-spacing: -0.4px; }
.comments-sub   { font-size: 14px; color: var(--muted); margin-bottom: 32px; text-align: center; line-height: 1.6; }
.comments-list  { display: flex; flex-direction: column; gap: 14px; }

.comment-card {
  background: var(--surface);
  border: 1.5px solid var(--glass-border);
  border-radius: 14px;
  padding: 18px;
  display: flex;
  gap: 14px;
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
}

.comment-card:hover { box-shadow: var(--shadow); transform: translateY(-1px); }

.comment-avatar { width: 40px; height: 40px; border-radius: 50%; flex-shrink: 0; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.comment-content { flex: 1; }
.comment-header  { display: flex; justify-content: space-between; align-items: center; margin-bottom: 5px; }
.comment-name    { font-size: 14px; font-weight: 700; color: var(--text); letter-spacing: -0.1px; }
.comment-date    { font-size: 11px; color: var(--muted); font-weight: 500; }
.comment-text    { font-size: 13.5px; color: var(--text); line-height: 1.65; white-space: pre-wrap; word-break: break-word; opacity: 0.85; }

/* ══════════════════════════════════════════════════
   TIPS
══════════════════════════════════════════════════ */
.tips-section { max-width: 1240px; margin: 0 auto; padding: 20px 24px 56px; }
.tips-title { font-size: 24px; font-weight: 800; color: var(--primary); margin-bottom: 8px; display: flex; align-items: center; gap: 10px; letter-spacing: -0.4px; }
.tips-sub   { font-size: 14px; color: var(--muted); margin-bottom: 28px; line-height: 1.6; }
.tips-list  { display: flex; flex-direction: column; gap: 12px; }

.tip-item {
  background: var(--surface);
  backdrop-filter: blur(12px);
  border: 1.5px solid var(--glass-border);
  border-radius: 14px;
  padding: 18px 22px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
}

.tip-item:hover { box-shadow: var(--shadow); transform: translateX(3px); }

.tip-num {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 99px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
  letter-spacing: 0.04em;
}

.tip-item h4 { font-size: 13.5px; font-weight: 700; color: var(--text); margin-bottom: 5px; letter-spacing: -0.1px; }
.tip-item p  { font-size: 13px; color: var(--muted); line-height: 1.7; }

/* ══════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════ */
footer {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border);
  padding: 28px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
  margin-top: 24px;
}

.ad-footer { width: 728px; height: 90px; max-width: 100%; margin: 0 auto 20px; }

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 12px 0 8px;
  flex-wrap: wrap;
}

.footer-links a { color: var(--primary); text-decoration: none; font-size: 13px; font-weight: 500; transition: opacity 0.15s; }
.footer-links a:hover { opacity: 0.75; }
.footer-links span { color: var(--border); }

/* ══════════════════════════════════════════════════
   MODALS
══════════════════════════════════════════════════ */
.modal-h1  { font-size: 22px; font-weight: 800; color: var(--primary); margin-bottom: 4px; letter-spacing: -0.3px; }
.modal-date { font-size: 12px; color: var(--muted); margin-bottom: 22px; font-weight: 500; }
.modal-h2  { font-size: 15px; font-weight: 700; color: var(--text); margin: 22px 0 8px; padding-top: 12px; border-top: 1px solid var(--border); }
.modal-p   { margin-bottom: 9px; color: #334155; font-size: 13.5px; line-height: 1.75; }
.modal-ul  { padding-left: 20px; margin-bottom: 9px; color: #334155; }
.modal-ul li { margin-bottom: 5px; font-size: 13.5px; line-height: 1.7; }

/* Library modal */
.library-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.library-content {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  width: 100%;
  max-width: 600px;
  max-height: 82vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 30px 60px rgba(0,0,0,0.2);
  animation: modalIn 0.22s cubic-bezier(0.4,0,0.2,1);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.96) translateY(12px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.library-header { padding: 22px 26px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.library-header h2 { font-size: 18px; font-weight: 800; color: var(--text); letter-spacing: -0.3px; }
.library-body  { padding: 20px 24px; overflow-y: auto; flex: 1; }

.file-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(255,255,255,0.7);
}

.file-item:hover {
  border-color: var(--primary);
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(25,91,139,0.1);
}

.file-item-icon { font-size: 24px; }
.file-item-info { flex: 1; overflow: hidden; }
.file-item-name { font-weight: 700; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text); letter-spacing: -0.1px; }
.file-item-size { font-size: 12px; color: var(--muted); margin-top: 2px; font-weight: 500; }

.close-btn {
  background: rgba(0,0,0,0.04);
  border: 1px solid var(--border);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  color: var(--muted);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.close-btn:hover { color: var(--danger); background: rgba(239,68,68,0.08); border-color: rgba(239,68,68,0.2); transform: scale(1.08); }

.upload-progress { width: 100%; height: 4px; background: var(--border); border-radius: 4px; margin-top: 14px; overflow: hidden; display: none; }
.upload-bar { height: 100%; background: linear-gradient(90deg, var(--success), var(--accent)); width: 0%; transition: width 0.3s; }

/* ══════════════════════════════════════════════════
   SUMMARY STYLE PILLS
══════════════════════════════════════════════════ */
.summary-style-pills { display: flex; flex-wrap: wrap; gap: 8px; }

.style-pill {
  background: var(--surface);
  color: var(--muted);
  border: 1.5px solid var(--border);
  border-radius: 99px;
  padding: 7px 16px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.style-pill:hover {
  background: rgba(25,91,139,0.06);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.style-pill.active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(16,185,129,0.28);
  transform: translateY(-1px);
}

.summary-style-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(16,185,129,0.1);
  color: var(--accent);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 10px;
  letter-spacing: 0.03em;
}

/* ══════════════════════════════════════════════════
   TEXT TOOLBAR
══════════════════════════════════════════════════ */
.text-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding: 10px 14px;
  background: rgba(240,244,248,0.7);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  backdrop-filter: blur(8px);
}

.text-search-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1 1 300px;
  min-width: 0;
}

.text-search-wrap input {
  flex: 1;
  min-width: 120px;
  height: 34px;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  padding: 0 12px;
  font-size: 13px;
  background: rgba(255,255,255,0.85);
  color: var(--text);
  outline: none;
  font-family: inherit;
  box-sizing: border-box;
  transition: var(--transition);
}

.text-search-wrap input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(25,91,139,0.1);
}

.text-tools {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  flex: 2 1 auto;
}

.tb-btn {
  background: rgba(255,255,255,0.85);
  border: 1.5px solid var(--border);
  color: var(--text);
  border-radius: 9px;
  padding: 0 13px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  white-space: nowrap;
  box-sizing: border-box;
  gap: 5px;
}

.tb-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(25,91,139,0.2);
}

.tb-btn:active { transform: scale(0.95); }

/* Font size group */
.font-size-group {
  display: inline-flex;
  align-items: center;
  background: rgba(255,255,255,0.85);
  border: 1.5px solid var(--border);
  border-radius: 9px;
  padding: 2px;
  height: 34px;
  box-sizing: border-box;
}

.font-size-group .font-btn {
  background: transparent;
  border: none;
  color: var(--text);
  padding: 0 10px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  outline: none;
  font-family: inherit;
}

.font-size-group .font-btn:hover {
  background: rgba(25,91,139,0.1);
  color: var(--primary);
}

.font-size-group .font-btn:active { transform: scale(0.92); }

.font-size-group span {
  font-size: 11px;
  color: var(--muted);
  min-width: 32px;
  text-align: center;
  font-weight: 700;
  user-select: none;
}

/* ══════════════════════════════════════════════════
   PLAYER BUTTON FEEDBACK
══════════════════════════════════════════════════ */
.btn-circle:active { transform: scale(0.88); }
.btn-circle.primary:active { transform: scale(0.91); }

/* ══════════════════════════════════════════════════
   CANCEL OCR BUTTON
══════════════════════════════════════════════════ */
#btnCancelOCR { animation: pulse-red 1.5s infinite; }

@keyframes pulse-red {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239,68,68,0.4); }
  50%       { box-shadow: 0 0 0 8px rgba(239,68,68,0); }
}

/* ══════════════════════════════════════════════════
   NAV TOOLS HIGHLIGHT
══════════════════════════════════════════════════ */
.nav-tools-highlight {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff !important;
  font-weight: 700 !important;
  padding: 7px 16px !important;
  border-radius: 99px;
  border: 1px solid rgba(255,255,255,0.14);
  box-shadow: 0 4px 14px rgba(25,91,139,0.28);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform 0.2s, box-shadow 0.2s !important;
}

.nav-tools-highlight:hover {
  transform: translateY(-1.5px) !important;
  box-shadow: 0 7px 22px rgba(25,91,139,0.42) !important;
  color: #fff !important;
  background: linear-gradient(135deg, var(--primary-light), var(--primary)) !important;
}

.nav-tools-highlight:active { transform: scale(0.96) !important; }

/* ══════════════════════════════════════════════════
   TOOLS PROMO BANNER
══════════════════════════════════════════════════ */
.tools-promo-banner {
  background: linear-gradient(135deg, rgba(25,91,139,0.06), rgba(25,91,139,0.02));
  border: 1.5px dashed rgba(25,91,139,0.3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
}

.tools-promo-banner:hover { border-style: solid; border-color: var(--primary); }
.tools-promo-text h3 { font-size: 15px; font-weight: 700; color: var(--primary); margin-bottom: 5px; letter-spacing: -0.2px; }
.tools-promo-text p  { font-size: 12.5px; color: var(--muted); line-height: 1.6; }

.btn-promo-tools {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 22px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(25,91,139,0.25);
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
}

.btn-promo-tools:hover {
  transform: translateY(-1.5px);
  box-shadow: 0 8px 22px rgba(25,91,139,0.4);
}

@media(max-width:600px) {
  .tools-promo-banner { flex-direction: column; align-items: stretch; text-align: center; }
  .btn-promo-tools { text-align: center; width: 100%; justify-content: center; }
}

/* ══════════════════════════════════════════════════
   ZEN MODE
══════════════════════════════════════════════════ */
body.zen-active {
  background: linear-gradient(145deg, #080e1a 0%, #0f172a 50%, #0d1a2e 100%) !important;
  color: #f8fafc !important;
  overflow-x: hidden;
}

body.zen-active header,
body.zen-active .how-section,
body.zen-active .faq-section,
body.zen-active .benefits-section,
body.zen-active .article-section,
body.zen-active .stats-section,
body.zen-active .comments-section,
body.zen-active .tips-section,
body.zen-active footer,
body.zen-active .sidebar,
body.zen-active #userInfoCard,
body.zen-active .tools-promo-banner,
body.zen-active #uploaderCard,
body.zen-active .ads-rect-row,
body.zen-active #readerCard h2 {
  display: none !important;
}

body.zen-active .wrapper {
  grid-template-columns: 1fr !important;
  max-width: 780px !important;
  margin: 0 auto !important;
  padding: 40px 20px !important;
  gap: 0 !important;
}

body.zen-active .main {
  width: 100% !important;
  max-width: 780px !important;
  margin: 0 auto !important;
}

body.zen-active #readerCard {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  margin: 0 auto 170px auto !important;
  transform: none !important;
  width: 100% !important;
}

body.zen-active .text-box {
  background: transparent !important;
  border: none !important;
  max-height: none !important;
  overflow-y: visible !important;
  font-size: 19px !important;
  line-height: 2.05 !important;
  color: #cbd5e1 !important;
  font-family: 'Inter', system-ui, sans-serif !important;
  text-align: justify;
}

body.zen-active .text-toolbar {
  background: rgba(15,23,42,0.5) !important;
  border: 1px solid rgba(255,255,255,0.08) !important;
  border-radius: 14px !important;
  backdrop-filter: blur(14px) !important;
  -webkit-backdrop-filter: blur(14px) !important;
  margin-bottom: 36px !important;
  padding: 10px 16px !important;
}

body.zen-active .tb-btn {
  background: rgba(15,23,42,0.4) !important;
  color: #94a3b8 !important;
  border: 1px solid rgba(255,255,255,0.08) !important;
}

body.zen-active .tb-btn:hover {
  background: var(--primary) !important;
  color: #fff !important;
}

body.zen-active .font-size-group {
  background: rgba(15,23,42,0.4) !important;
  border: 1px solid rgba(255,255,255,0.08) !important;
}

body.zen-active .font-size-group .font-btn { color: #94a3b8 !important; }
body.zen-active .font-size-group .font-btn:hover { background: rgba(255,255,255,0.06) !important; color: #fff !important; }

body.zen-active #btnWordDefine {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
  color: #fff !important;
  border-color: transparent !important;
  box-shadow: 0 4px 14px rgba(25,91,139,0.3) !important;
}

body.zen-active .player {
  position: fixed !important;
  bottom: 24px !important;
  top: auto !important;
  left: 50% !important;
  transform: translateX(-50%) !important;
  width: 90% !important;
  max-width: 720px !important;
  height: auto !important;
  max-height: 160px !important;
  z-index: 999 !important;
  background: rgba(10,18,38,0.85) !important;
  backdrop-filter: blur(24px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(24px) saturate(180%) !important;
  border: 1px solid rgba(255,255,255,0.12) !important;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5) !important;
  border-radius: 22px !important;
  padding: 18px 26px !important;
  margin: 0 !important;
  transition: all 0.3s cubic-bezier(0.4,0,0.2,1) !important;
}

.zen-exit-btn { display: none; }

body.zen-active .zen-exit-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  position: absolute;
  top: 14px;
  right: 18px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.65);
  padding: 6px 12px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

body.zen-active .zen-exit-btn:hover {
  background: rgba(239,68,68,0.15);
  border-color: rgba(239,68,68,0.3);
  color: #ef4444;
  transform: translateY(-1px);
}

body.zen-active .player-title,
body.zen-active .player-user,
body.zen-active .cloud-sync { display: none !important; }

body.zen-active .player-file {
  font-size: 14px !important;
  margin-bottom: 6px !important;
  text-align: center !important;
  color: rgba(255,255,255,0.9) !important;
}

body.zen-active .time-labels {
  margin-bottom: 9px !important;
  font-size: 11px !important;
  color: rgba(255,255,255,0.55) !important;
}

body.zen-active .player-btns {
  justify-content: center !important;
  gap: 16px !important;
  display: flex !important;
  align-items: center !important;
}

body.zen-active .btn-circle { width: 40px !important; height: 40px !important; background: rgba(255,255,255,0.08) !important; }
body.zen-active .btn-circle:hover { background: rgba(255,255,255,0.18) !important; }
body.zen-active .btn-circle.primary { width: 50px !important; height: 50px !important; background: #fff !important; color: #0f172a !important; }
body.zen-active .btn-export,
body.zen-active .rec-badge { display: none !important; }

/* ══════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════ */
@media(max-width:768px) {
  .wrapper { grid-template-columns: 1fr; padding: 16px; gap: 16px; }
  .sidebar { display: none; }
  .controls-grid { grid-template-columns: 1fr; }

  .user-info-card { flex-direction: column; align-items: center; text-align: center; gap: 12px; padding: 18px 14px; }
  .uic-buttons { margin-left: 0 !important; width: 100%; justify-content: center; flex-wrap: wrap; }

  .ads-rect-row { flex-direction: column; align-items: center; gap: 16px; }
  .ad-header { display: none !important; }

  .header-inner { flex-wrap: wrap; gap: 8px; padding: 10px 0; }
  .logo { font-size: 18px !important; }
  .logo img { height: 44px !important; }
  .btn-login { font-size: 12px; padding: 7px 12px; gap: 5px; }
  .btn-login img { width: 15px; height: 15px; }
  .user-name { max-width: 80px; }
  .nav-links-header { display: none; }

  .player {
    position: sticky;
    top: 64px;
    padding: 14px 16px;
    border-radius: 14px;
    box-shadow: 0 8px 28px rgba(9,50,90,0.25);
  }

  .player-title, .player-user, .cloud-sync { display: none !important; }
  .player-file { font-size: 13px; margin-bottom: 3px; }
  .time-labels { margin-bottom: 7px; font-size: 11px; }
  .player-btns { gap: 8px; }
  .btn-circle { width: 38px; height: 38px; }
  .btn-circle.primary { width: 44px; height: 44px; }

  .text-toolbar { flex-direction: column; align-items: stretch; }
  .text-search-wrap, .text-tools { width: 100%; }

  .how-section, .benefits-section, .faq-section, .tips-section { padding-left: 16px; padding-right: 16px; }
  .faq-section { padding-bottom: 32px; }
}

/* ══════════════════════════════════════════════════
   DARK MODE
══════════════════════════════════════════════════ */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --surface: rgba(22,36,56,0.9);
    --glass-border: rgba(255,255,255,0.08);
    --text: #f1f5f9;
    --muted: #94a3b8;
    --border: #2a3a4e;
    --ad-bg: rgba(15,23,42,0.5);
  }

  body { background: linear-gradient(145deg, #080e1a 0%, #0f172a 55%, #0a1525 100%); }

  header { background: rgba(10,18,38,0.8); border-bottom-color: rgba(255,255,255,0.06); }

  .drop-zone { background: rgba(25,91,139,0.05); }
  .drop-zone:hover, .drop-zone.drag { background: rgba(25,91,139,0.12); }

  .user-info-card { background: linear-gradient(135deg, rgba(22,36,56,0.95), rgba(30,41,59,0.95)); border-color: rgba(99,102,241,0.2); }
  .summary-box { background: rgba(30,41,59,0.95); border-color: rgba(99,102,241,0.2); color: #c4b5fd; }
  .key-point { background: rgba(99,102,241,0.12); color: #e2e8f0; }

  .file-item { background: rgba(22,36,56,0.8); }
  .file-item:hover { background: rgba(30,41,59,0.95); }

  .how-step, .benefit-card, .tip-item, .faq-item, .comment-card { background: rgba(22,36,56,0.85); }

  .article-section { background: rgba(22,36,56,0.7); }

  .nav-links-header a { color: rgba(255,255,255,0.65); }
  .nav-links-header a:hover { color: #fff; background: rgba(255,255,255,0.06); }

  .style-pill { background: rgba(22,36,56,0.7); color: #94a3b8; border-color: #2a3a4e; }
  .style-pill:hover { background: rgba(25,91,139,0.2); color: #f1f5f9; }
  .style-pill.active { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; border-color: transparent; }

  .summary-style-badge { background: rgba(16,185,129,0.15); color: #10b981; border-color: rgba(16,185,129,0.3); }

  .text-toolbar { background: rgba(10,18,38,0.65); border-color: #2a3a4e; }
  .tb-btn { background: rgba(22,36,56,0.85); color: #94a3b8; border-color: #2a3a4e; }
  .tb-btn:hover { background: var(--primary); color: #fff; }

  .text-search-wrap input { background: rgba(10,18,38,0.65); color: #f1f5f9; border-color: #2a3a4e; }
  .font-size-group { background: rgba(22,36,56,0.85); border-color: #2a3a4e; }
  .font-size-group .font-btn { color: #94a3b8; }
  .font-size-group .font-btn:hover { background: rgba(255,255,255,0.06); color: #fff; }

  .card { background: rgba(22,36,56,0.88); }
  select { background: rgba(22,36,56,0.85); }
  .status-bar { background: rgba(10,18,38,0.6); }
  .user-dropdown { background: rgba(18,30,46,0.97); border-color: #2a3a4e; }
  .dropdown-item:hover { background: rgba(255,255,255,0.05); }
  footer { background: rgba(10,18,38,0.75); }

  .library-content { background: rgba(18,30,46,0.98); }
}

/* ══════════════════════════════════════════════════
   VISUAL DOCUMENT READER STYLES
   ══════════════════════════════════════════════════ */
.reader-tab:hover {
  background: rgba(25, 91, 139, 0.12) !important;
  color: var(--primary) !important;
}
.reader-tab.active:hover {
  color: #fff !important;
}

/* Custom styles for Word HTML document styling */
.word-reader-content table {
  width: 100% !important;
  border-collapse: collapse !important;
  margin: 20px 0 !important;
}
.word-reader-content th, 
.word-reader-content td {
  border: 1px solid #cbd5e1 !important;
  padding: 10px 14px !important;
  text-align: left !important;
}
.word-reader-content th {
  background-color: #f1f5f9 !important;
  font-weight: 700 !important;
}
.word-reader-content h1,
.word-reader-content h2,
.word-reader-content h3 {
  font-family: 'Inter', sans-serif !important;
  color: #0f172a !important;
  margin-top: 24px !important;
  margin-bottom: 12px !important;
  font-weight: 700 !important;
}
.word-reader-content p {
  margin-bottom: 14px !important;
  color: #334155 !important;
  text-align: justify !important;
}

/* Dark mode overrides for Mammoth Word reader */
@media (prefers-color-scheme: dark) {
  .word-reader-content {
    background: #0f172a !important;
    color: #f1f5f9 !important;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4) !important;
  }
  .word-reader-content th {
    background-color: #1e293b !important;
    color: #f1f5f9 !important;
  }
  .word-reader-content th,
  .word-reader-content td {
    border-color: #334155 !important;
  }
  .word-reader-content h1,
  .word-reader-content h2,
  .word-reader-content h3 {
    color: #ffffff !important;
  }
  .word-reader-content p {
    color: #cbd5e1 !important;
  }
  
  .epub-reader-content {
    background: #0f172a !important;
    color: #f1f5f9 !important;
  }
}