/* ============================================================
   CERTIVARA EXAM — Stylesheet
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --primary:      #00B4D8;
  --primary-dark: #0077B6;
  --accent:       #F72585;
  --accent2:      #7B2FBE;
  --success:      #00D464;
  --danger:       #FF4757;
  --warning:      #FFD700;
  --bg:           #05080F;
  --bg2:          #0D1421;
  --bg3:          #111827;
  --text:         #E8F4FD;
  --text2:        #A8BED4;
  --text3:        #5A7A94;
  --border:       rgba(255,255,255,0.07);
  --card-bg:      rgba(13,20,33,0.85);
  --shadow:       0 4px 32px rgba(0,180,216,0.12);
  --radius:       12px;
  --radius-lg:    20px;
  --sidebar-w:    260px;
  --navbar-h:     62px;
  --transition:   0.3s cubic-bezier(.4,0,.2,1);
  --font:         'Inter', sans-serif;
}

[data-theme="light"] {
  --bg:      #F0F4F8;
  --bg2:     #FFFFFF;
  --bg3:     #E2EAF0;
  --text:    #0D1B2A;
  --text2:   #3A4A5C;
  --text3:   #6B7F93;
  --border:  rgba(0,0,0,0.08);
  --card-bg: rgba(255,255,255,0.85);
  --shadow:  0 4px 24px rgba(0,100,180,0.10);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow: hidden;
  transition: background var(--transition), color var(--transition);
}

/* ── Anti-screenshot / No-select ── */
.no-select {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  pointer-events: none;
}
.no-select { pointer-events: auto; } /* allow click but no copy */

/* Context menu block is in JS */
body { -webkit-user-select: none; -moz-user-select: none; }
input, textarea, select { -webkit-user-select: auto; user-select: auto; }

/* ── Watermark overlay ── */
.watermark {
  position: fixed; inset: 0; z-index: 999;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent 0, transparent 80px,
    rgba(0,180,216,0.025) 80px, rgba(0,180,216,0.025) 160px
  );
}
.watermark::before {
  content: attr(data-text);
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%,-50%) rotate(-30deg);
  font-size: 2.5rem; font-weight: 800;
  color: rgba(0,180,216,0.04);
  white-space: nowrap; letter-spacing: 0.1em;
  text-transform: uppercase;
  pointer-events: none;
}

/* ── Security Overlay ── */
.security-overlay {
  position: fixed; inset: 0; z-index: 99999;
  background: rgba(5,8,15,0.97);
  backdrop-filter: blur(20px);
  display: flex; align-items: center; justify-content: center;
  text-align: center;
}
.security-overlay.hidden { display: none; }
.security-overlay-content { max-width: 400px; padding: 40px; }
.security-icon { font-size: 4rem; margin-bottom: 20px; }
.security-overlay-content h2 { font-size: 1.8rem; margin-bottom: 12px; }
.security-overlay-content p { color: var(--text2); margin-bottom: 16px; line-height: 1.6; }

/* ── Loader ── */
.exam-loader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; text-align: center;
  transition: opacity 0.5s ease;
}
.exam-loader.hidden { opacity: 0; pointer-events: none; }
.loader-logo-wrap { margin-bottom: 20px; }
.loader-app-icon { width: 80px; height: 80px; border-radius: 20px; object-fit: cover; margin: 0 auto; box-shadow: 0 8px 32px rgba(0,180,216,0.3); }
.loader-title { font-size: 2rem; font-weight: 800; letter-spacing: 0.05em; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 4px; }
.loader-subtitle { color: var(--text3); font-size: 0.9rem; margin-bottom: 28px; }
.loader-progress-bar { width: 240px; height: 3px; background: var(--border); border-radius: 3px; overflow: hidden; margin: 0 auto 12px; }
.loader-progress-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 3px; width: 0; transition: width 0.3s ease; }
.loader-status { font-size: 0.82rem; color: var(--text3); }

/* ── Lock Screen ── */
.lock-screen {
  position: fixed; inset: 0; z-index: 9000;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
}
.lock-screen.hidden { display: none; }
.lock-inner { max-width: 440px; width: 90%; text-align: center; padding: 40px; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-lg); backdrop-filter: blur(20px); box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.lock-logo { width: 80px; height: 80px; border-radius: 20px; margin: 0 auto 16px; object-fit: cover; }
.lock-inner h1 { font-size: 1.6rem; font-weight: 800; margin-bottom: 8px; }
.lock-inner > p { color: var(--text2); margin-bottom: 24px; }
.lock-code-wrap { display: flex; gap: 10px; margin-bottom: 12px; }
.lock-input {
  flex: 1; padding: 14px 16px;
  font-size: 1rem; font-weight: 600; letter-spacing: 0.12em;
  text-align: center; text-transform: uppercase;
  background: var(--bg); border: 2px solid var(--border);
  border-radius: var(--radius); color: var(--text);
  font-family: 'Courier New', monospace;
  transition: border-color var(--transition);
}
.lock-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(0,180,216,0.12); }
.lock-error { color: var(--danger); font-size: 0.85rem; margin-bottom: 12px; }
.lock-error.hidden { display: none; }
.lock-contact { font-size: 0.82rem; color: var(--text3); margin-top: 16px; }
.lock-contact a { color: var(--primary); }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 24px; border-radius: 50px; font-weight: 600;
  font-size: 0.9rem; cursor: pointer; border: none; outline: none;
  transition: all var(--transition); text-decoration: none;
  position: relative; overflow: hidden;
}
.btn-sm { padding: 8px 16px; font-size: 0.82rem; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; box-shadow: 0 4px 16px rgba(0,180,216,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,180,216,0.45); }
.btn-accent { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; }
.btn-accent:hover { transform: translateY(-2px); }
.btn-ghost { background: var(--card-bg); border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--primary); color: #fff; border-color: transparent; }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }
.tag { font-size: 0.72rem; font-weight: 600; padding: 3px 10px; border-radius: 50px; background: rgba(0,180,216,0.1); color: var(--primary); border: 1px solid rgba(0,180,216,0.2); }

/* ── Exam App Layout ── */
.exam-app { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }
.exam-app.hidden { display: none; }

/* Navbar */
.exam-navbar {
  height: var(--navbar-h);
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0; z-index: 100;
  backdrop-filter: blur(12px);
}
.exam-nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; padding: 0 20px;
}
.exam-nav-brand { display: flex; align-items: center; gap: 12px; }
.exam-nav-logo { width: 36px; height: 36px; border-radius: 10px; object-fit: cover; }
.exam-nav-title { font-weight: 800; font-size: 1rem; letter-spacing: 0.04em; }
.exam-nav-sub { font-size: 0.68rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.08em; }
.exam-nav-center { flex: 1; display: flex; justify-content: center; }
.session-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.8rem; font-weight: 600; color: var(--primary);
  padding: 5px 14px; border-radius: 50px;
  background: rgba(0,180,216,0.08);
  border: 1px solid rgba(0,180,216,0.2);
}
.exam-nav-actions { display: flex; gap: 6px; }
.exam-nav-btn {
  width: 36px; height: 36px; border-radius: 9px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text2); cursor: pointer; font-size: 0.95rem;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition); text-decoration: none;
}
.exam-nav-btn:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

/* Content area */
.exam-content { display: flex; flex: 1; overflow: hidden; }

/* Sidebar */
.exam-sidebar {
  width: var(--sidebar-w); min-width: var(--sidebar-w);
  background: var(--bg2); border-right: 1px solid var(--border);
  overflow-y: auto; flex-shrink: 0;
  transition: transform var(--transition);
}
.exam-sidebar::-webkit-scrollbar { width: 4px; }
.exam-sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.sidebar-nav { padding: 16px 12px; }
.sidebar-section-title { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text3); padding: 6px 10px; margin-bottom: 4px; }
.sidebar-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 10px 12px; border-radius: 10px; border: none;
  background: transparent; color: var(--text2); font-size: 0.88rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition); text-align: left;
  position: relative;
}
.sidebar-item:hover { background: rgba(0,180,216,0.08); color: var(--primary); }
.sidebar-item.active { background: rgba(0,180,216,0.12); color: var(--primary); font-weight: 600; }
.sidebar-item i { width: 18px; text-align: center; }
.sidebar-badge {
  margin-left: auto; background: var(--accent);
  color: #fff; font-size: 0.65rem; font-weight: 700;
  padding: 2px 7px; border-radius: 50px; min-width: 20px; text-align: center;
  display: none;
}
.sidebar-badge.visible { display: block; }

.sidebar-categories { display: flex; flex-direction: column; gap: 2px; }
.cat-btn {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 8px 12px; border-radius: 8px; border: none;
  background: transparent; color: var(--text3); font-size: 0.8rem;
  cursor: pointer; transition: all var(--transition); text-align: left;
}
.cat-btn:hover { background: rgba(0,180,216,0.06); color: var(--primary); }
.cat-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--primary); flex-shrink: 0; }
.cat-count { margin-left: auto; font-size: 0.68rem; color: var(--text3); }

/* ── Main Panel ── */
.exam-main {
  flex: 1; overflow-y: auto; position: relative;
  padding: 28px 32px;
}
.exam-main::-webkit-scrollbar { width: 5px; }
.exam-main::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.sidebar-toggle {
  display: none; position: fixed; bottom: 24px; left: 16px; z-index: 200;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--primary); border: none; color: #fff;
  font-size: 1rem; cursor: pointer; box-shadow: 0 4px 16px rgba(0,180,216,0.4);
  align-items: center; justify-content: center;
}

/* ── Views ── */
.view.hidden { display: none; }
.view-header { margin-bottom: 28px; }
.view-title { font-size: 1.7rem; font-weight: 800; margin-bottom: 4px; letter-spacing: -0.02em; }
.view-sub { color: var(--text3); font-size: 0.9rem; }
.section-h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; }

/* ── Dashboard ── */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 32px; }
.stat-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  text-align: center; backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.stat-icon { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; margin: 0 auto 12px; }
.stat-val { font-size: 1.6rem; font-weight: 800; margin-bottom: 4px; }
.stat-label { font-size: 0.75rem; color: var(--text3); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }

.quick-actions { margin-bottom: 40px; }
.quick-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quick-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  backdrop-filter: blur(12px);
  transition: all var(--transition); cursor: pointer;
}
.quick-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(0,180,216,0.3); }
.qc-icon { font-size: 2.2rem; margin-bottom: 12px; }
.quick-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.quick-card p { font-size: 0.83rem; color: var(--text3); margin-bottom: 16px; }

.categories-section {}
.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.category-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
  cursor: pointer; transition: all var(--transition);
  display: flex; align-items: center; gap: 12px;
}
.category-card:hover { border-color: rgba(0,180,216,0.4); background: rgba(0,180,216,0.04); transform: translateX(4px); }
.cat-card-icon { font-size: 1.4rem; flex-shrink: 0; }
.cat-card-name { font-size: 0.87rem; font-weight: 600; margin-bottom: 2px; }
.cat-card-count { font-size: 0.72rem; color: var(--text3); }

/* ── Filter Bar ── */
.filter-bar { margin-bottom: 24px; }
.filter-bar-top { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.filter-controls { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.filter-select {
  padding: 8px 32px 8px 14px; border-radius: 10px;
  background: var(--bg); border: 1.5px solid var(--border);
  color: var(--text); font-size: 0.88rem; cursor: pointer;
  outline: none; transition: border-color var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235A7A94' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
}
.filter-select:focus { border-color: var(--primary); }

/* ── Question Container ── */
.question-container { max-width: 780px; margin: 0 auto; }
.q-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; gap: 12px; }
.q-progress-wrap { flex: 1; display: flex; align-items: center; gap: 12px; }
.q-progress-bar { flex: 1; height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.q-progress-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 3px; transition: width 0.4s ease; }
.q-counter { font-size: 0.82rem; font-weight: 600; color: var(--text3); white-space: nowrap; }
.q-actions-top { display: flex; align-items: center; gap: 8px; }
.q-btn {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--card-bg); border: 1px solid var(--border);
  color: var(--text2); cursor: pointer; font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.q-btn:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.q-btn.bookmarked { background: rgba(255,215,0,0.15); border-color: rgba(255,215,0,0.4); color: var(--warning); }
.q-category-tag { font-size: 0.72rem; font-weight: 600; padding: 3px 12px; border-radius: 50px; background: rgba(0,180,216,0.1); color: var(--primary); border: 1px solid rgba(0,180,216,0.2); white-space: nowrap; }

.question-body {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  backdrop-filter: blur(12px); margin-bottom: 20px;
}

.question-text {
  font-size: 1.05rem; font-weight: 500; line-height: 1.7;
  margin-bottom: 24px; color: var(--text);
  -webkit-user-select: none; user-select: none;
}

.options-grid { display: flex; flex-direction: column; gap: 10px; }
.option-btn {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 18px; border-radius: 12px; cursor: pointer;
  border: 1.5px solid var(--border);
  background: var(--bg); color: var(--text);
  text-align: left; font-size: 0.92rem; font-weight: 500; line-height: 1.55;
  transition: all var(--transition); -webkit-user-select: none; user-select: none;
}
.option-btn:hover:not(.answered) { border-color: var(--primary); background: rgba(0,180,216,0.06); transform: translateX(4px); }
.option-letter {
  width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
  background: rgba(0,180,216,0.1); border: 1px solid rgba(0,180,216,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem; font-weight: 700; color: var(--primary);
  font-family: monospace; margin-top: 1px;
}
.option-text { flex: 1; }

.option-btn.selected { border-color: var(--primary); background: rgba(0,180,216,0.1); }
.option-btn.correct  { border-color: var(--success); background: rgba(0,212,100,0.1); }
.option-btn.correct .option-letter { background: rgba(0,212,100,0.2); border-color: var(--success); color: var(--success); }
.option-btn.wrong    { border-color: var(--danger); background: rgba(255,71,87,0.1); }
.option-btn.wrong .option-letter { background: rgba(255,71,87,0.2); border-color: var(--danger); color: var(--danger); }
.option-btn.answered { cursor: default; transform: none !important; }

/* Explanation */
.explanation-box {
  background: rgba(0,180,216,0.06); border: 1px solid rgba(0,180,216,0.2);
  border-radius: var(--radius); padding: 18px 20px; margin-bottom: 20px;
  animation: fadeInUp 0.4s ease;
}
.explanation-box.hidden { display: none; }
.expl-header { display: flex; align-items: center; gap: 8px; font-weight: 700; margin-bottom: 10px; }
.expl-icon { font-size: 1.2rem; }
.expl-text { font-size: 0.9rem; color: var(--text2); line-height: 1.7; -webkit-user-select: none; user-select: none; }

/* Navigation */
.q-nav { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.q-nav-center { flex: 1; text-align: center; }
.q-score-live { font-size: 0.85rem; font-weight: 600; color: var(--text3); }

/* ── Exam Timer Bar ── */
.exam-timer-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 14px 20px; background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 20px; flex-wrap: wrap;
}
.timer-text { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.1rem; color: var(--primary); }
.exam-progress-wrap { display: flex; align-items: center; gap: 12px; flex: 1; justify-content: flex-end; }
.exam-p-bar { width: 200px; height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.exam-p-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 3px; transition: width 0.3s ease; }
.timer-urgent { color: var(--danger) !important; animation: timerPulse 1s ease infinite; }
@keyframes timerPulse { 0%,100%{opacity:1} 50%{opacity:0.5} }

/* ── Results ── */
.results-panel { display: flex; align-items: center; justify-content: center; min-height: 60vh; }
.results-panel.hidden { display: none; }
.results-inner { text-align: center; max-width: 500px; padding: 40px; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-lg); backdrop-filter: blur(12px); }
.results-icon { font-size: 4rem; margin-bottom: 16px; animation: iconBounce 1s ease; }
@keyframes iconBounce { 0%{transform:scale(0)} 60%{transform:scale(1.15)} 100%{transform:scale(1)} }
.results-inner h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 20px; }
.results-score-big { margin-bottom: 24px; }
.results-score-big span { font-size: 3.5rem; font-weight: 900; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.results-score-big small { display: block; font-size: 1.1rem; color: var(--text3); margin-top: 4px; }
.results-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-bottom: 28px; }
.result-stat { padding: 14px; background: var(--bg); border-radius: 12px; }
.result-stat span { display: block; font-size: 1.4rem; font-weight: 800; margin-bottom: 4px; }
.result-stat small { font-size: 0.72rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.06em; }
.results-actions { display: flex; flex-direction: column; gap: 10px; }

/* ── Exam Setup ── */
.exam-setup-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; max-width: 700px; }
.setup-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  backdrop-filter: blur(12px); cursor: pointer;
  transition: all var(--transition);
}
.setup-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(0,180,216,0.3); }
.setup-icon { font-size: 2.5rem; margin-bottom: 12px; }
.setup-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
.setup-card p { font-size: 0.85rem; color: var(--text3); margin-bottom: 12px; }
.setup-tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* ── Bookmarks ── */
.bookmark-toolbar { display: flex; gap: 10px; margin-bottom: 20px; }
.bookmarks-list { display: flex; flex-direction: column; gap: 12px; }
.bookmark-item {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px;
  backdrop-filter: blur(12px); position: relative;
}
.bookmark-item-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.bookmark-item-q { font-size: 0.92rem; font-weight: 500; line-height: 1.5; flex: 1; -webkit-user-select: none; user-select: none; }
.bookmark-remove { background: none; border: none; color: var(--text3); cursor: pointer; font-size: 0.9rem; padding: 4px; border-radius: 6px; transition: all var(--transition); }
.bookmark-remove:hover { background: rgba(255,71,87,0.15); color: var(--danger); }
.bookmark-item-cat { font-size: 0.72rem; color: var(--primary); font-weight: 600; }
.empty-state { text-align: center; padding: 60px 20px; }
.empty-state h3 { font-size: 1.2rem; margin-bottom: 8px; }
.empty-state p { color: var(--text3); }

/* ── Stats Detail ── */
.stats-detail-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-bottom: 32px; }
.cat-progress-section {}
.cat-progress-item { margin-bottom: 14px; }
.cat-progress-header { display: flex; justify-content: space-between; margin-bottom: 5px; font-size: 0.85rem; }
.cat-progress-name { font-weight: 600; }
.cat-progress-pct { color: var(--text3); font-size: 0.78rem; }
.cat-progress-bar-wrap { background: var(--border); height: 6px; border-radius: 3px; overflow: hidden; }
.cat-progress-bar-fill { height: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); transition: width 0.6s ease; }

/* ── Modal ── */
.modal {
  position: fixed; top: 50%; left: 50%; transform: translate(-50%,-50%);
  z-index: 10000; max-width: 380px; width: 90%;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  text-align: center;
}
.modal.hidden { display: none; }
.modal h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.modal p { color: var(--text2); font-size: 0.9rem; margin-bottom: 20px; }
.modal-actions { display: flex; gap: 10px; justify-content: center; }
.modal-overlay { position: fixed; inset: 0; z-index: 9999; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); }
.modal-overlay.hidden { display: none; }

/* ── Animations ── */
@keyframes fadeInUp { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:translateY(0)} }

/* ── Responsive ── */
@media (max-width: 900px) {
  .exam-sidebar {
    position: fixed; top: var(--navbar-h); left: 0; bottom: 0; z-index: 500;
    transform: translateX(-100%);
  }
  .exam-sidebar.open { transform: translateX(0); box-shadow: 8px 0 30px rgba(0,0,0,0.3); }
  .sidebar-toggle { display: flex; }
  .exam-main { padding: 20px 16px; }
  .stats-row { grid-template-columns: repeat(2,1fr); }
  .quick-grid { grid-template-columns: 1fr; }
  .exam-setup-grid { grid-template-columns: 1fr; }
  .stats-detail-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 600px) {
  .stats-row { grid-template-columns: repeat(2,1fr); }
  .q-header { flex-direction: column; align-items: flex-start; }
  .results-grid { grid-template-columns: repeat(3,1fr); }
  .exam-progress-wrap { display: none; }
}