/* ─── VARIABLES ──────────────────────────────────────────── */
:root {
  --accent:   #4f8ef7;
  --accent-2: #7c5cfc;
  --success:  #22c97a;
  --danger:   #f7506b;
  --warn:     #f5a623;

  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  --radius:    16px;
  --radius-sm: 10px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

[data-theme="dark"] {
  --bg:          #0d0f18;
  --surface:     #151824;
  --surface-2:   #1e2235;
  --surface-3:   #252a40;
  --border:      rgba(255,255,255,0.07);
  --text:        #e8ecf5;
  --text-muted:  #7a82a0;
  --text-faint:  #4a5070;
  --shadow:      0 4px 32px rgba(0,0,0,0.5);
  --glow:        0 0 40px rgba(79,142,247,0.12);
}

[data-theme="light"] {
  --bg:          #f0f2fa;
  --surface:     #ffffff;
  --surface-2:   #f5f7ff;
  --surface-3:   #ebeeff;
  --border:      rgba(0,0,0,0.08);
  --text:        #12172e;
  --text-muted:  #5a6080;
  --text-faint:  #9aa0c0;
  --shadow:      0 4px 32px rgba(60,80,180,0.10);
  --glow:        0 0 40px rgba(79,142,247,0.08);
}

/* ─── RESET ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

/* ─── BACKGROUND DECORATION ─────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 15% 15%, rgba(79,142,247,0.09) 0%, transparent 65%),
    radial-gradient(ellipse 50% 45% at 85% 85%, rgba(124,92,252,0.08) 0%, transparent 65%),
    radial-gradient(ellipse 40% 35% at 80% 10%, rgba(79,142,247,0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

/* ─── NAVBAR / LOGO ──────────────────────────────────────── */
.navbar, .global-navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  z-index: 200;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(0,0,0,0.18);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 28px;
  transition: background var(--transition);
}

.navbar > *:first-child, .global-navbar > *:first-child { justify-self: start; }
.navbar > *:nth-child(2), .global-navbar > *:nth-child(2) { justify-self: center; }
.navbar > *:last-child, .global-navbar > *:last-child { justify-self: end; }

.navbar-left, .global-navbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

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

.logo-icon {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 16px rgba(79,142,247,0.35);
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.3px;
  line-height: 1.1;
}

.logo-text span {
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-top: 2px;
}

/* Theme switcher */
.theme-switcher {
  display: flex;
  border-radius: 30px;
  border: 1px solid var(--border);
  background: var(--surface-3);
  padding: 3px;
  gap: 2px;
}

.theme-opt {
  padding: 5px 12px;
  border-radius: 24px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.76rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
  gap: 5px;
  white-space: nowrap;
}
.theme-opt:hover { color: var(--text); }
.theme-opt.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 6px rgba(0,0,0,0.2);
}

/* ─── FOOTER ─────────────────────────────────────────────── */
footer {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 50;
  text-align: center;
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--text-faint);
  background: var(--surface);
  border-top: 1px solid var(--border);
  letter-spacing: 0.3px;
}
footer a {
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

/* ─── SHARED UTILS ────────────────────────────────────────── */
.gradient {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── LOGIN SPECIFIC ──────────────────────────────────────── */
.login-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 20px 60px;
  position: relative;
  min-height: 100vh;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 44px 40px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow), var(--glow);
  animation: fadeUp 0.5s ease;
  position: relative;
  overflow: hidden;
}

.login-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 24px 24px 0 0;
}

.card-header { text-align: center; margin-bottom: 32px; }
.card-icon { font-size: 42px; display: block; margin-bottom: 16px; filter: drop-shadow(0 4px 16px rgba(79,142,247,0.3)); }
.card-title { font-family: var(--font-display); font-weight: 800; font-size: 1.6rem; letter-spacing: -0.4px; margin-bottom: 6px; line-height: 1.15; }
.card-subtitle { font-size: 0.88rem; color: var(--text-muted); line-height: 1.5; }

.form { display: flex; flex-direction: column; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field-label { font-family: var(--font-display); font-size: 0.76rem; font-weight: 700; letter-spacing: 0.8px; text-transform: uppercase; color: var(--text-faint); }
.field-wrap { position: relative; display: flex; align-items: center; }
.field-icon { position: absolute; left: 14px; font-size: 16px; pointer-events: none; color: var(--text-faint); transition: color var(--transition); }
.field-input { width: 100%; padding: 12px 14px 12px 42px; border-radius: var(--radius-sm); border: 2px solid var(--border); background: var(--surface-2); color: var(--text); font-family: var(--font-body); font-size: 0.92rem; outline: none; transition: all var(--transition); }
.field-input:focus { border-color: var(--accent); background: rgba(79,142,247,0.05); box-shadow: 0 0 0 3px rgba(79,142,247,0.12); }
.field-input:focus + .field-icon, .field-wrap:focus-within .field-icon { color: var(--accent); }
.field-toggle { position: absolute; right: 12px; background: none; border: none; cursor: pointer; color: var(--text-faint); font-size: 16px; padding: 4px; transition: color var(--transition); line-height: 1; }

.form-extras { display: flex; align-items: center; justify-content: space-between; margin-top: -4px; }
.remember-wrap { display: flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.custom-check { width: 17px; height: 17px; border-radius: 5px; border: 2px solid var(--border); background: var(--surface-3); display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: all var(--transition); font-size: 10px; }
.remember-wrap.checked .custom-check { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; }
.remember-label { font-size: 0.8rem; color: var(--text-muted); }
.forgot-link { font-size: 0.8rem; color: var(--accent); text-decoration: none; font-weight: 500; transition: opacity var(--transition); }
.forgot-wrap { position: relative; display: inline-flex; align-items: center; justify-content: flex-end; }
.forgot-popup { display: none; position: absolute; right: 0; top: calc(100% + 8px); min-width: 240px; max-width: min(320px, 82vw); padding: 10px 12px; border-radius: var(--radius-sm); border: 1px solid rgba(245,166,35,0.3); background: var(--surface-2); color: var(--warn); font-size: 0.76rem; line-height: 1.35; box-shadow: var(--shadow); z-index: 20; white-space: normal; }
.forgot-popup.visible { display: block; }

.submit-btn-login {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius);
  border: none;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(79,142,247,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
  margin-top: 4px;
}
.submit-btn-login::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%); transform: translateX(-100%); transition: transform 0.6s ease; }
.submit-btn-login:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79,142,247,0.5); }
.submit-btn-login:hover::before { transform: translateX(100%); }

.divider { display: flex; align-items: center; gap: 12px; margin: 4px 0; }
.divider::before, .divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.divider span { font-size: 0.72rem; color: var(--text-faint); font-weight: 500; white-space: nowrap; }
.register-row { text-align: center; font-size: 0.83rem; color: var(--text-muted); }
.register-row a { color: var(--accent); text-decoration: none; font-weight: 600; transition: opacity var(--transition); }

.alert { display: none; align-items: flex-start; gap: 10px; padding: 12px 14px; border-radius: var(--radius-sm); font-size: 0.82rem; animation: fadeUp 0.3s ease; }
.alert.visible { display: flex; }
.alert.error { background: rgba(247,80,107,0.1); border: 1px solid rgba(247,80,107,0.25); color: var(--danger); }
.alert.info { background: rgba(79,142,247,0.1); border: 1px solid rgba(79,142,247,0.25); color: var(--accent); }

/* ─── HOME SPECIFIC ───────────────────────────────────────── */
.hamburger-btn { display: none; width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface-2); cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 4px; flex-shrink: 0; transition: all var(--transition); margin-right: 4px; }
.hamburger-btn span { display: block; width: 16px; height: 2px; background: var(--text); border-radius: 2px; transition: all var(--transition); }
.hamburger-btn.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger-btn.open span:nth-child(2) { opacity: 0; }
.hamburger-btn.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.sidebar-overlay { display: none; }

/* Botón de logout en navbar */
.logout-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 30px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.76rem;
  cursor: pointer;
  margin-left: 12px;
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.logout-btn .logout-icon { font-size: 1.1em; }
.logout-btn:hover { border-color: var(--danger); color: var(--danger); }

.app { display: flex; height: 100vh; padding-top: 60px; position: relative; transition: padding-left var(--transition); }
.sidebar { width: 320px; min-width: 320px; background: var(--surface); border-right: 1px solid var(--border); display: flex; flex-direction: column; overflow-y: auto; box-shadow: var(--shadow); transition: background var(--transition), transform var(--transition), width var(--transition), min-width var(--transition), opacity var(--transition); scrollbar-width: thin; scrollbar-color: var(--surface-3) transparent; position: relative; z-index: 150; }

/* Colapso automático durante el test */
.sidebar.collapsed {
  width: 0;
  min-width: 0;
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
}

/* Zona sensible para re-desplegar con hover */
.sidebar-trigger {
  position: fixed;
  left: 0;
  top: 60px;
  bottom: 0;
  width: 20px;
  z-index: 160;
  display: none;
}

.sidebar-trigger.active {
  display: block;
}

.sidebar.collapsed.hover-reveal {
  width: 320px;
  min-width: 320px;
  transform: translateX(0);
  opacity: 1;
  pointer-events: all;
  box-shadow: 8px 0 32px rgba(0,0,0,0.4);
}

.sidebar-body { padding: 20px 20px 24px; display: flex; flex-direction: column; gap: 22px; flex: 1; padding-bottom: 80px; }
.section-label { font-family: var(--font-display); font-size: 0.7rem; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text-faint); margin-bottom: 10px; }

.upload-zone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 22px 16px; text-align: center; cursor: pointer; transition: all var(--transition); background: var(--surface-2); position: relative; overflow: hidden; }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--accent); background: rgba(79,142,247,0.07); }
.upload-zone input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.upload-icon { font-size: 28px; display: block; margin-bottom: 8px; transition: transform var(--transition); }
.upload-title { font-family: var(--font-display); font-weight: 600; font-size: 0.88rem; margin-bottom: 4px; }
.upload-hint { font-size: 0.75rem; color: var(--text-muted); }
.upload-success { display: none; align-items: center; gap: 10px; background: rgba(34,201,122,0.1); border: 1px solid rgba(34,201,122,0.25); border-radius: var(--radius-sm); padding: 12px 14px; margin-top: 10px; }
.upload-success.visible { display: flex; }
.q-count-badge { font-size: 0.72rem; background: rgba(34,201,122,0.15); color: var(--success); border-radius: 20px; padding: 2px 8px; font-weight: 600; white-space: nowrap; }

.time-pills { display: flex; flex-wrap: wrap; gap: 7px; }
.pill { padding: 7px 13px; border-radius: 30px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text-muted); font-size: 0.8rem; font-weight: 500; cursor: pointer; transition: all var(--transition); user-select: none; font-family: var(--font-body); }
.pill.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; color: #fff; font-weight: 600; box-shadow: 0 3px 14px rgba(79,142,247,0.35); }

.cat-btns { display: flex; gap: 8px; }
.cat-btn { flex: 1; padding: 9px 10px; border-radius: var(--radius-sm); border: 2px solid var(--border); background: var(--surface-2); color: var(--text-muted); font-family: var(--font-display); font-weight: 600; font-size: 0.78rem; cursor: pointer; transition: all var(--transition); text-align: center; user-select: none; line-height: 1.3; }
.cat-btn.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; color: #fff; box-shadow: 0 3px 14px rgba(79,142,247,0.35); }

/* Hierarchy styles */
.category-hierarchy { display: flex; flex-direction: column; gap: 12px; }
.category-block { display: flex; flex-direction: column; gap: 8px; }
.parent-btn { width: 100%; text-align: left !important; padding: 12px 16px !important; display: flex; align-items: center; gap: 10px; font-size: 0.85rem !important; position: relative; }
.parent-btn .icon { font-size: 1.1rem; transition: transform 0.3s ease; }
.parent-btn.active .icon { transform: rotate(90deg); content: '📂'; }
.sub-cat-container { padding-left: 20px; border-left: 2px solid var(--border); margin-left: 10px; display: flex; flex-direction: column; gap: 8px; animation: slideDown 0.3s ease; }
.sub-cat-container.hidden { display: none; }

@keyframes slideDown { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }

.start-btn { width: 100%; padding: 15px; border-radius: var(--radius); border: none; background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%); color: #fff; font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; letter-spacing: 0.3px; cursor: pointer; transition: all var(--transition); box-shadow: 0 4px 20px rgba(79,142,247,0.35); position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; gap: 8px; }
.start-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79,142,247,0.5); }

.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar { height: 64px; display: flex; align-items: center; justify-content: space-between; padding: 0 32px; border-bottom: 1px solid var(--border); background: var(--surface); flex-shrink: 0; box-shadow: 0 1px 0 var(--border); transition: background var(--transition); }
.progress-bar-wrap { width: 200px; height: 5px; background: var(--surface-3); border-radius: 10px; overflow: hidden; }
.progress-bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 10px; transition: width 0.4s cubic-bezier(0.4,0,0.2,1); }

.content { flex: 1; overflow-y: auto; padding-bottom: 48px; display: flex; align-items: flex-start; justify-content: center; padding: 32px 32px 48px; scrollbar-width: thin; scrollbar-color: var(--surface-3) transparent; }
.welcome { width: 100%; max-width: 600px; text-align: center; padding: 80px 40px; display: flex; flex-direction: column; align-items: center; gap: 20px; animation: fadeUp 0.5s ease; }
.welcome h1 { font-family: var(--font-display); font-weight: 800; font-size: 2.2rem; line-height: 1.15; letter-spacing: -0.5px; }

.question-wrap { width: 100%; max-width: 760px; display: flex; flex-direction: column; gap: 20px; animation: fadeUp 0.35s ease; }
.question-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 30px; box-shadow: var(--shadow); transition: background var(--transition); }
.option-btn { width: 100%; text-align: left; border: 2px solid var(--border); border-radius: var(--radius-sm); padding: 14px 18px; background: var(--surface-2); color: var(--text); font-family: var(--font-body); font-size: 0.9rem; cursor: pointer; margin-bottom: 10px; }

/* Countdown Checkbox styles */
.countdown-check-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  margin-top: 12px;
  padding: 8px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.countdown-check-wrap:hover {
  background: var(--surface-3);
  border-color: var(--text-faint);
}

.countdown-check-wrap.checked {
  background: rgba(79, 142, 247, 0.05);
  border-color: var(--accent);
}

.custom-checkbox {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 2px solid var(--border);
  background: var(--surface-3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
  font-size: 11px;
  color: #fff;
}

.countdown-check-wrap.checked .custom-checkbox {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
}

.countdown-check-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.countdown-check-wrap.checked .countdown-check-label {
  color: var(--text);
}

/* ─── RESPONSIVE ─────────────────────────────────────────── */
/* Nota: breakpoint 480px movido después del 768px para respetar la cascada CSS */

body.login-page::before {
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 60% 50% at 15% 15%, rgba(79,142,247,0.09) 0%, transparent 65%),
    radial-gradient(ellipse 50% 45% at 85% 85%, rgba(124,92,252,0.08) 0%, transparent 65%),
    radial-gradient(ellipse 40% 35% at 80% 10%, rgba(79,142,247,0.05) 0%, transparent 60%);
}

.navbar {
  z-index: 100;
}

.page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 20px 60px;
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

.login-page .submit-btn {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius);
  border: none;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(79,142,247,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
  margin-top: 4px;
}

.login-page .submit-btn::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.login-page .submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(79,142,247,0.5);
}

.login-page .submit-btn:hover::before {
  transform: translateX(100%);
}

.login-page .submit-btn:active {
  transform: translateY(0);
}

.format-hint {
  background: rgba(79,142,247,0.07);
  border: 1px solid rgba(79,142,247,0.18);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-top: 8px;
}

.format-hint summary {
  font-size: 0.76rem;
  color: var(--accent);
  cursor: pointer;
  font-weight: 500;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}

.format-hint summary::before {
  content: '▶';
  font-size: 0.6rem;
  transition: transform var(--transition);
}

.format-hint[open] summary::before {
  transform: rotate(90deg);
}

.format-hint pre {
  margin-top: 8px;
  font-size: 0.68rem;
  color: var(--text-muted);
  white-space: pre-wrap;
  line-height: 1.5;
  font-family: 'Courier New', monospace;
  max-height: 180px;
  overflow-y: auto;
}

.qcount-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.qcount-display {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.qcount-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--accent);
  line-height: 1;
}

.qcount-value span {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-faint);
  margin-left: 4px;
}

.qcount-available {
  font-size: 0.72rem;
  color: var(--text-faint);
}

.qcount-available b {
  color: var(--text-muted);
  font-weight: 600;
}

.qcount-range-wrap {
  position: relative;
  height: 36px;
  display: flex;
  align-items: center;
}

.qcount-track {
  position: absolute;
  left: 0;
  right: 0;
  height: 5px;
  border-radius: 10px;
  background: var(--surface-3);
  overflow: hidden;
}

.qcount-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 10px;
  transition: width 0.15s ease;
  width: 0%;
}

.qcount-range {
  position: relative;
  width: 100%;
  height: 36px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
  outline: none;
  z-index: 1;
}

.qcount-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 2px 8px rgba(79,142,247,0.45);
  border: 2px solid var(--surface);
  cursor: grab;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.qcount-range::-webkit-slider-thumb:active {
  cursor: grabbing;
  transform: scale(1.2);
  box-shadow: 0 4px 16px rgba(79,142,247,0.6);
}

.qcount-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 2px 8px rgba(79,142,247,0.45);
  border: 2px solid var(--surface);
  cursor: grab;
}

.qcount-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 2px;
}

.qcount-labels span {
  font-size: 0.65rem;
  color: var(--text-faint);
  font-family: var(--font-display);
}

.order-btns {
  display: flex;
  gap: 8px;
}

.order-btn {
  flex: 1;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  user-select: none;
  line-height: 1.3;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.order-btn:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  background: rgba(124,92,252,0.07);
}

.order-btn.active {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 3px 14px rgba(124,92,252,0.35);
}

.mode-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.mode-card {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 12px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  background: var(--surface-2);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.mode-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.mode-card.estudio::before { background: linear-gradient(135deg, rgba(34,201,122,0.12), transparent); }
.mode-card.prueba::before { background: linear-gradient(135deg, rgba(247,80,107,0.12), transparent); }
.mode-card.examen::before { background: linear-gradient(135deg, rgba(245,166,35,0.12), transparent); }
.mode-card:hover { border-color: var(--text-faint); transform: translateY(-2px); }
.mode-card:hover::before { opacity: 1; }
.mode-card.active.estudio { border-color: var(--success); box-shadow: 0 0 0 1px var(--success), 0 4px 20px rgba(34,201,122,0.2); }
.mode-card.active.prueba { border-color: var(--danger); box-shadow: 0 0 0 1px var(--danger), 0 4px 20px rgba(247,80,107,0.2); }
.mode-card.active.examen { border-color: var(--warn); box-shadow: 0 0 0 1px var(--warn), 0 4px 20px rgba(245,166,35,0.2); }
.mode-card.active::before { opacity: 1; }

.mode-icon { font-size: 22px; display: block; margin-bottom: 7px; }
.mode-title { font-family: var(--font-display); font-weight: 700; font-size: 0.82rem; margin-bottom: 4px; }
.mode-desc { font-size: 0.7rem; color: var(--text-muted); line-height: 1.4; }

.start-btn::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.start-btn:hover::before { transform: translateX(100%); }
.start-btn:active { transform: translateY(0); }
.start-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }

.topbar-left { display: flex; align-items: center; gap: 16px; flex: 1; }
.topbar-center { display: flex; align-items: center; justify-content: center; flex: 0 0 auto; }
.topbar-right { display: flex; align-items: center; justify-content: flex-end; gap: 16px; flex: 1; }

.progress-info {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.progress-info span { color: var(--accent); }

.timer {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 30px;
  padding: 6px 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 1px;
  transition: all var(--transition);
}

.timer.warn { border-color: var(--warn); color: var(--warn); background: rgba(245,166,35,0.1); }
.timer.critical { border-color: var(--danger); color: var(--danger); background: rgba(247,80,107,0.1); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.6; } }

.timer-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  animation: blink 2s infinite;
}

.timer.warn .timer-dot { background: var(--warn); }
.timer.critical .timer-dot { background: var(--danger); animation: pulse 0.5s infinite; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

.mode-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-display);
  letter-spacing: 0.3px;
}

.mode-badge.estudio { background: rgba(34,201,122,0.12); color: var(--success); border: 1px solid rgba(34,201,122,0.25); }
.mode-badge.prueba { background: rgba(247,80,107,0.12); color: var(--danger); border: 1px solid rgba(247,80,107,0.25); }
.mode-badge.examen { background: rgba(245,166,35,0.12); color: var(--warn); border: 1px solid rgba(245,166,35,0.25); }

.topbar .submit-btn {
  padding: 8px 18px;
  border-radius: 30px;
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
  display: none;
}

.topbar .submit-btn.visible { display: flex; align-items: center; gap: 6px; }
.topbar .submit-btn:hover { background: var(--accent); color: #fff; box-shadow: 0 3px 14px rgba(79,142,247,0.35); }

.end-btn {
  padding: 8px 18px;
  border-radius: 30px;
  border: 2px solid var(--danger);
  background: transparent;
  color: var(--danger);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
  display: none;
  align-items: center;
  gap: 6px;
}

.end-btn.visible { display: flex; }
.end-btn:hover { background: var(--danger); color: #fff; box-shadow: 0 3px 14px rgba(247,80,107,0.35); }

.welcome-icon { font-size: 72px; line-height: 1; display: block; filter: drop-shadow(0 8px 24px rgba(79,142,247,0.25)); }
.welcome p { color: var(--text-muted); font-size: 1rem; line-height: 1.6; max-width: 420px; }
.welcome-steps { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin-top: 8px; }
.step-chip { display: flex; align-items: center; gap: 8px; background: var(--surface); border: 1px solid var(--border); border-radius: 30px; padding: 8px 16px; font-size: 0.82rem; color: var(--text-muted); box-shadow: var(--shadow); }
.step-chip .num { width: 22px; height: 22px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; font-size: 0.72rem; font-weight: 700; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); flex-shrink: 0; }

.q-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.q-num { font-family: var(--font-display); font-size: 0.75rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--text-faint); flex-shrink: 0; padding-top: 2px; }
.q-id-badge { font-size: 0.7rem; background: var(--surface-3); color: var(--text-faint); border-radius: 6px; padding: 2px 8px; font-weight: 500; white-space: nowrap; }
.question-text { font-size: 1.05rem; font-weight: 400; line-height: 1.65; color: var(--text); margin-bottom: 24px; }
.options-list { display: flex; flex-direction: column; gap: 10px; }

.option-btn {
  width: 100%;
  text-align: left;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  background: var(--surface-2);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  position: relative;
  overflow: hidden;
  margin-bottom: 0;
}

.option-btn::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  transition: width 0.3s ease;
}

.option-letter { width: 30px; height: 30px; border-radius: 8px; border: 1.5px solid var(--border); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 700; font-size: 0.8rem; transition: all var(--transition); flex-shrink: 0; background: var(--surface-3); }
.option-text { padding-top: 4px; line-height: 1.5; flex: 1; }
.option-btn:hover:not(:disabled) { border-color: var(--accent); background: rgba(79,142,247,0.06); transform: translateX(3px); }
.option-btn:hover:not(:disabled) .option-letter { background: var(--accent); color: #fff; border-color: var(--accent); }
.option-btn.selected:not(.correct):not(.incorrect) { border-color: var(--accent); background: rgba(79,142,247,0.08); }
.option-btn.selected:not(.correct):not(.incorrect) .option-letter { background: var(--accent); color: #fff; border-color: var(--accent); }
.option-btn.correct { border-color: var(--success); background: rgba(34,201,122,0.08); }
.option-btn.correct .option-letter { background: var(--success); color: #fff; border-color: var(--success); }
.option-btn.incorrect { border-color: var(--danger); background: rgba(247,80,107,0.08); }
.option-btn.incorrect .option-letter { background: var(--danger); color: #fff; border-color: var(--danger); }
.option-btn:disabled { cursor: not-allowed; }
.check-icon { margin-left: auto; font-size: 16px; display: none; flex-shrink: 0; padding-top: 5px; }
.option-btn.correct .check-icon, .option-btn.incorrect .check-icon { display: block; }

.reveal-card { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 20px; margin-top: 8px; }
.reveal-answer { display: none; animation: fadeUp 0.3s ease; }
.reveal-answer.visible { display: block; }
.reveal-label { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--text-faint); margin-bottom: 8px; font-family: var(--font-display); }
.reveal-text { font-size: 0.92rem; line-height: 1.6; color: var(--text); }
.reveal-sources { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.source-item { font-size: 0.76rem; color: var(--text-muted); padding: 4px 0; display: flex; gap: 6px; align-items: flex-start; }
.source-item::before { content: '›'; color: var(--accent); flex-shrink: 0; }
.reveal-btns { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.reveal-btn { padding: 9px 18px; border-radius: 30px; border: none; font-family: var(--font-display); font-weight: 600; font-size: 0.8rem; cursor: pointer; transition: all var(--transition); }
.reveal-btn.show { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 3px 14px rgba(79,142,247,0.3); }
.reveal-btn.show:hover { transform: translateY(-1px); box-shadow: 0 5px 18px rgba(79,142,247,0.4); }
.self-eval { display: none; gap: 10px; flex-wrap: wrap; }
.self-eval.visible { display: flex; }
.self-btn { padding: 9px 18px; border-radius: 30px; border: 2px solid transparent; font-family: var(--font-display); font-weight: 600; font-size: 0.8rem; cursor: pointer; transition: all var(--transition); }
.self-btn.known { border-color: var(--success); color: var(--success); background: rgba(34,201,122,0.08); }
.self-btn.known:hover { background: rgba(34,201,122,0.18); }
.self-btn.unknown { border-color: var(--danger); color: var(--danger); background: rgba(247,80,107,0.08); }
.self-btn.unknown:hover { background: rgba(247,80,107,0.18); }

.feedback-banner { border-radius: var(--radius-sm); padding: 14px 18px; display: none; align-items: flex-start; gap: 12px; animation: fadeUp 0.3s ease; }
.feedback-banner.visible { display: flex; }
.feedback-banner.correct { background: rgba(34,201,122,0.1); border: 1px solid rgba(34,201,122,0.25); }
.feedback-banner.incorrect { background: rgba(247,80,107,0.1); border: 1px solid rgba(247,80,107,0.25); }
.feedback-icon { font-size: 20px; flex-shrink: 0; }
.feedback-title { font-family: var(--font-display); font-weight: 700; font-size: 0.88rem; margin-bottom: 4px; }
.feedback-banner.correct .feedback-title { color: var(--success); }
.feedback-banner.incorrect .feedback-title { color: var(--danger); }
.feedback-body { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }
.feedback-ref { font-size: 0.75rem; color: var(--text-faint); margin-top: 6px; font-style: italic; }

.nav-btns { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.nav-btn { padding: 10px 22px; border-radius: 30px; border: 2px solid var(--border); background: var(--surface); color: var(--text); font-family: var(--font-display); font-weight: 600; font-size: 0.85rem; cursor: pointer; transition: all var(--transition); display: flex; align-items: center; gap: 8px; }
.nav-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(79,142,247,0.06); }
.nav-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.nav-btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; color: #fff; box-shadow: 0 3px 14px rgba(79,142,247,0.3); }
.nav-btn.primary:hover { transform: translateY(-1px); box-shadow: 0 5px 18px rgba(79,142,247,0.4); color: #fff; border-color: transparent; }
.q-status-mini { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }

.results-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(8px); z-index: 300; display: none; align-items: center; justify-content: center; padding: 20px; animation: fadeIn 0.3s ease; }
.results-overlay.visible { display: flex; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.results-card { background: var(--surface); border-radius: 24px; padding: 40px; max-width: 560px; width: 100%; border: 1px solid var(--border); box-shadow: 0 24px 80px rgba(0,0,0,0.4); animation: scaleIn 0.4s cubic-bezier(0.34,1.56,0.64,1); max-height: 90vh; overflow-y: auto; }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.85); } to { opacity: 1; transform: scale(1); } }
.results-header { text-align: center; margin-bottom: 32px; }
.score-ring { width: 130px; height: 130px; border-radius: 50%; margin: 0 auto 20px; display: flex; flex-direction: column; align-items: center; justify-content: center; position: relative; background: conic-gradient(var(--success) 0deg, var(--surface-3) 0deg); box-shadow: 0 0 0 6px var(--surface-2), 0 0 0 7px var(--border); transition: background 1s ease; }
.score-ring::before { content: ''; position: absolute; inset: 10px; border-radius: 50%; background: var(--surface); }
.score-num { position: relative; z-index: 1; font-family: var(--font-display); font-weight: 800; font-size: 2.2rem; line-height: 1; color: var(--text); }
.score-label { position: relative; z-index: 1; font-size: 0.7rem; color: var(--text-muted); font-weight: 500; margin-top: 2px; }
.results-title { font-family: var(--font-display); font-weight: 800; font-size: 1.6rem; letter-spacing: -0.3px; margin-bottom: 6px; }
.results-sub { font-size: 0.9rem; color: var(--text-muted); }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 24px; }
.stat-box { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 12px; text-align: center; }
.stat-val { font-family: var(--font-display); font-weight: 800; font-size: 1.8rem; line-height: 1; margin-bottom: 4px; }
.stat-val.correct { color: var(--success); }
.stat-val.incorrect { color: var(--danger); }
.stat-val.skipped { color: var(--text-faint); }
.stat-lbl { font-size: 0.72rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; font-family: var(--font-display); }
.breakdown-title { font-family: var(--font-display); font-weight: 700; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-faint); margin-bottom: 12px; }
.breakdown-list { display: flex; flex-direction: column; gap: 8px; max-height: 380px; overflow-y: auto; scrollbar-width: thin; margin-bottom: 24px; }
.breakdown-item { display: flex; align-items: flex-start; gap: 12px; padding: 14px 14px; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--border); font-size: 0.82rem; transition: border-color var(--transition); }
.breakdown-item.bd-correct { border-left: 3px solid var(--success); }
.breakdown-item.bd-incorrect { border-left: 3px solid var(--danger); }
.breakdown-item.bd-skipped { border-left: 3px solid var(--text-faint); }
.breakdown-status { font-size: 15px; flex-shrink: 0; margin-top: 2px; }
.breakdown-q { color: var(--text); line-height: 1.5; flex: 1; min-width: 0; }
.breakdown-q .bd-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 5px; }
.breakdown-q .bd-num { font-family: var(--font-display); font-size: 0.68rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-faint); white-space: nowrap; }
.breakdown-q .bd-badge { font-size: 0.65rem; font-weight: 700; padding: 1px 7px; border-radius: 20px; white-space: nowrap; font-family: var(--font-display); letter-spacing: 0.3px; }
.bd-badge.correct { background: rgba(34,201,122,0.15); color: var(--success); }
.bd-badge.incorrect { background: rgba(247,80,107,0.15); color: var(--danger); }
.bd-badge.skipped { background: rgba(100,100,130,0.15); color: var(--text-faint); }
.breakdown-q .bd-pregunta { font-size: 0.82rem; color: var(--text); margin-bottom: 8px; line-height: 1.5; }
.bd-answers { display: flex; flex-direction: column; gap: 4px; margin-top: 6px; padding-top: 8px; border-top: 1px solid var(--border); }
.bd-answer-row { display: flex; align-items: flex-start; gap: 7px; font-size: 0.77rem; line-height: 1.4; }
.bd-answer-label { font-family: var(--font-display); font-weight: 700; font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.4px; white-space: nowrap; padding-top: 1px; flex-shrink: 0; }
.bd-answer-row.bd-correct-ans .bd-answer-label { color: var(--success); }
.bd-answer-row.bd-wrong-ans .bd-answer-label { color: var(--danger); }
.bd-answer-row.bd-correct-ans .bd-answer-text { color: var(--success); }
.bd-answer-row.bd-wrong-ans .bd-answer-text { color: var(--danger); }
.bd-answer-text { color: var(--text-muted); }
.results-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.action-btn { flex: 1; padding: 12px; border-radius: var(--radius-sm); border: 2px solid var(--border); font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; cursor: pointer; transition: all var(--transition); display: flex; align-items: center; justify-content: center; gap: 8px; }
.action-btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; color: #fff; box-shadow: 0 3px 14px rgba(79,142,247,0.3); }
.action-btn.primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(79,142,247,0.4); }
.action-btn.secondary { background: transparent; color: var(--text-muted); }
.action-btn.secondary:hover { border-color: var(--text-muted); color: var(--text); }
.empty-state { text-align: center; padding: 32px 16px; color: var(--text-faint); font-size: 0.85rem; }
.empty-state .empty-icon { font-size: 36px; display: block; margin-bottom: 10px; opacity: 0.5; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 10px; }

@media (max-width: 900px) {
  .sidebar { width: 280px; min-width: 280px; }
  .mode-cards { grid-template-columns: 1fr 1fr; }
  .mode-card.examen { grid-column: 1 / -1; }
  .content { padding: 20px; }
  .topbar { padding: 0 20px; }
  .progress-bar-wrap { width: 130px; }
  /* Botón logout en tablet: algo más compacto */
  .logout-btn { padding: 5px 10px; font-size: 0.72rem; }
}

@media (max-width: 768px) {
  .global-navbar, .navbar {
    display: flex !important;
    justify-content: space-between !important;
    padding: 0 12px;
    height: 54px;
  }
  .global-navbar-left {
    gap: 6px;
    flex: 1;
    min-width: 0;
    overflow: hidden;
  }
  .logo-text { font-size: 1rem; }
  .logo-text span { display: none; }
  /* Theme-switcher más compacto para dejar espacio al logout */
  .theme-switcher { flex-shrink: 0; }
  .theme-opt { padding: 4px 8px; font-size: 0.68rem; gap: 3px; }
  .hamburger-btn { display: flex; flex-shrink: 0; }
  /* Logout: ocultar texto en tablets/móviles para evitar superposiciones */
  .logout-btn {
    padding: 6px 8px;
    margin-left: 8px;
    border: none;
    background: transparent;
  }
  .logout-btn .logout-text { display: none; }
  .logout-btn .logout-icon { font-size: 1.25rem; margin: 0; }
  .theme-switcher .theme-text { display: none; }
  .theme-opt { padding: 6px 10px; }
  .app { padding-top: 54px; height: calc(100vh - 54px); min-height: 0; }
  /* Sidebar: overlay type en móvil. z-index 250 > navbar (200) para cubrirla si necesario */
  .sidebar {
    position: fixed;
    top: 54px;
    left: 0;
    bottom: 0;
    width: 88vw;
    max-width: 340px;
    z-index: 250;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
    box-shadow: 4px 0 32px rgba(0,0,0,0.35);
    overflow-y: auto;
    /* Anular colapso de escritorio cuando estamos en móvil */
    opacity: 1 !important;
    pointer-events: auto !important;
    min-width: unset !important;
    width: 88vw !important;
  }
  /* Sidebar abierto */
  .sidebar.open {
    transform: translateX(0) !important;
  }
  /* El colapso de test no aplica en móvil */
  .sidebar.collapsed {
    transform: translateX(-100%) !important;
    width: 88vw !important;
    min-width: unset !important;
  }
  .sidebar.collapsed.open {
    transform: translateX(0) !important;
  }
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 54px 0 0 0;
    background: rgba(0,0,0,0.5);
    z-index: 240;
    backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .sidebar-overlay.visible { opacity: 1; pointer-events: all; }
  .main { width: 100%; }
  .topbar { padding: 8px 12px; height: auto; min-height: 52px; flex-wrap: wrap; gap: 6px; justify-content: center; }
  .topbar-left { gap: 8px; flex: 1 1 100%; min-width: 0; justify-content: center; }
  .topbar-center { flex: 1 1 100%; order: -1; margin-bottom: 4px; }
  .topbar-right { gap: 8px; flex: 1 1 100%; justify-content: center; }
  .progress-bar-wrap { width: 90px; }
  .progress-info { font-size: 0.75rem; }
  .mode-badge { font-size: 0.68rem; padding: 3px 8px; }
  .topbar .submit-btn, .end-btn { font-size: 0.72rem; padding: 6px 10px; }
  .timer { font-size: 0.78rem; padding: 4px 10px; }
  .content { padding: 16px 14px 80px; align-items: flex-start; }
  .welcome { padding: 32px 16px 24px; gap: 14px; }
  .welcome-icon { font-size: 52px; }
  .welcome h1 { font-size: 1.7rem; }
  .welcome p { font-size: 0.9rem; }
  .welcome-steps { gap: 8px; }
  .step-chip { font-size: 0.75rem; padding: 6px 12px; }
  .question-wrap { gap: 14px; }
  .question-card { padding: 18px 16px; }
  .question-text { font-size: 0.95rem; margin-bottom: 16px; }
  .option-btn { padding: 11px 14px; font-size: 0.85rem; gap: 10px; }
  .option-letter { width: 26px; height: 26px; font-size: 0.75rem; }
  .nav-btns { gap: 8px; }
  .nav-btn { padding: 9px 14px; font-size: 0.8rem; }
  .q-status-mini { font-size: 0.72rem; }
  .results-overlay { padding: 0; align-items: flex-end; }
  .results-card { border-radius: 20px 20px 0 0; max-width: 100%; width: 100%; max-height: 92vh; padding: 28px 20px 32px; }
  .score-ring { width: 110px; height: 110px; }
  .score-num { font-size: 1.9rem; }
  .results-title { font-size: 1.3rem; }
  .stats-grid { gap: 8px; }
  .stat-val { font-size: 1.5rem; }
  .results-actions { flex-direction: column; }
  .action-btn { flex: unset; width: 100%; }
  footer { font-size: 0.65rem; padding: 8px 12px; }
  .reveal-btns { flex-direction: column; }
  .reveal-btn, .self-btn { width: 100%; text-align: center; justify-content: center; }
  .feedback-banner { padding: 12px 14px; }
  .mode-cards { grid-template-columns: 1fr; }
  .mode-card.examen { grid-column: auto; }
}

@media (max-width: 480px) {
  .navbar, .global-navbar { padding: 0 10px; }
  .logo-text span { display: none; }
  .theme-opt { padding: 4px 8px; font-size: 0.85rem; }
  .login-page { padding: 74px 14px 56px; }
  .login-card { padding: 32px 22px 28px; border-radius: 18px; }
  .card-title { font-size: 1.4rem; }
  .form-extras { flex-direction: column; align-items: flex-start; gap: 10px; }
  .forgot-popup { right: auto; left: 0; min-width: 220px; max-width: min(300px, 82vw); }
  .hamburger-btn { display: flex; }
  /* Botón logout en móvil: ajustar márgenes */
  .logout-btn {
    margin-left: 4px;
  }
  /* Theme switcher más compacto */
  .theme-switcher { flex-shrink: 1; min-width: 0; }
  .global-navbar-left { gap: 4px; }
}

@media (max-width: 400px) {
  .global-navbar { padding: 0 12px; }
  .logo-icon { width: 32px; height: 32px; font-size: 15px; }
  .logo-text { font-size: 0.9rem; }
  .theme-opt { padding: 4px 8px; font-size: 0.85rem; }
  .welcome h1 { font-size: 1.45rem; }
  .question-text { font-size: 0.88rem; }
  .content { padding: 12px 10px 80px; }
  .question-card { padding: 14px 12px; }
}

.navbar-right-placeholder { visibility: hidden; }

/* ─── FOOTER GLOBALES ──────────────────────────────────────── */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  text-align: center;
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--text-faint);
  background: var(--surface);
  border-top: 1px solid var(--border);
  letter-spacing: 0.3px;
}
.site-footer a {
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

/* ─── OTRAS UTILIDADES GLOBALES ────────────────────────────── */
.upload-success-icon { font-size: 18px; flex-shrink: 0; }

.hidden {
  display: none !important;
}