/* Exam Simulator - Modern Compact CSS (cleaned) */

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --primary: #0066cc;
  --secondary: #f8f9fa;
  --accent: #00bcf2;
  --success: #28a745;
  --warning: #ffc107;
  --error: #dc3545;
  --info: #17a2b8;

  /* Text Colors */
  --text: #212529;
  --text-light: #6c757d;
  --text-white: #ffffff;

  /* Backgrounds */
  --bg: #ffffff;
  --bg-gray: #f8f9fa;
  --bg-dark: #343a40;
  --card-bg: #ffffff;

  /* Borders & Shadows */
  --border: #dee2e6;
  --border-light: #e9ecef;
  --shadow: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.15);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 1.5rem;

  /* Radii */
  --radius: 6px;

  /* Extended palette */
  --primary-dark: #1e3c72;
  --primary-gradient-end: #2a5298;

  /* Typography */
  --font-heading: 'Segoe UI', 'Helvetica Neue', sans-serif;
  --font-body: 'Segoe UI', system-ui, sans-serif;

  /* Extended radii */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-pill: 999px;
}

[data-theme="dark"], .dark-mode {
  --text: #ffffff;
  --text-light: #adb5bd;
  --bg: #1a1a1a;
  --bg-gray: #2d3338;
  --bg-dark: #212529;
  --card-bg: #2d3338;
  --border: #495057;
  --border-light: #343a40;
}

/* ===== RESET & BASE ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: var(--text);
  line-height: 1.4;
  font-size: 15px;
  min-height: 100vh;
}

[data-theme="dark"] body, .dark-mode body {
  background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
}

.container { max-width: 1350px; margin: 0 auto; padding: var(--space); }

/* ===== UTILITIES ===== */
.screen { display: none; }
.screen.active { display: block; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  background: var(--bg-gray);
  padding: var(--space) var(--space-lg);
  border-bottom: 1px solid var(--border-light);
  font-weight: 600;
}
.card-body { padding: var(--space-lg); }

.grid { display: grid; gap: var(--space-lg); }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }

/* ===== BUTTONS (single source of truth) ===== */
.btn {
  padding: var(--space-sm) var(--space-xl);
  border: 1px solid var(--border);
  border-radius: 25px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(0,102,204,0.3);
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute; inset: 0;
  left: -100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,102,204,0.4); }
.btn:hover::before { left: 100%; }

.btn-primary { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); box-shadow: var(--shadow-lg); }

.btn-secondary {
  background: linear-gradient(135deg, #6c757d, #495057);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(108,117,125,0.3);
}
.btn-secondary:hover { box-shadow: 0 8px 25px rgba(108,117,125,0.4); }

.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-warning { background: var(--warning); color: var(--text); border-color: var(--warning); }
.btn-error   { background: var(--error);   color: #fff; border-color: var(--error); }
.btn-outline {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
}
.btn-info { background: var(--info); color: #fff; border-color: var(--info); }

/* ===== THEME TOGGLE ===== */
.theme-controls {
  position: fixed; top: var(--space-lg); right: var(--space-lg); z-index: 1000;
}
.theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  cursor: pointer; transition: all .2s ease; box-shadow: var(--shadow);
}
.theme-toggle:hover { transform: scale(1.1); }

/* ===== WELCOME SCREEN ===== */
#welcome-screen {
  text-align: center;
  display: flex; flex-direction: column; align-items: center; justify-content: flex-start;
  min-height: 100vh; padding-top: 1.25rem; padding-left: var(--space-sm); padding-right: var(--space-sm);
}

.hero {
  background: var(--card-bg);
  border-radius: 15px;
  padding: var(--space-xl) var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  max-width: 1200px; width: 100%;
}
[data-theme="dark"] .hero, .dark-mode .hero { box-shadow: 0 10px 30px rgba(0,0,0,0.3); }

.logo { display: flex; align-items: center; justify-content: center; gap: var(--space); margin-bottom: var(--space-lg); }
.logo i, .logo h1 {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.logo i { font-size: 2.5rem; }
.logo h1 { font-size: 2rem; font-weight: 700; }

.hero h2 { font-size: 1.4rem; color: var(--text-light); margin-bottom: var(--space-sm); font-weight: 300; }
.hero p  { color: var(--text-light); margin-bottom: var(--space-lg); font-size: 1rem; }

.exam-info {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-lg); margin-bottom: var(--space-xl);
}
.info-card {
  background: linear-gradient(135deg, #ffffff, #f8f9fa);
  padding: var(--space-lg);
  border-radius: 15px; text-align: center;
  transition: all .3s ease; box-shadow: 0 8px 25px rgba(0,0,0,0.08);
  position: relative; overflow: hidden;
}
[data-theme="dark"] .info-card, .dark-mode .info-card { background: linear-gradient(135deg, #495057, #6c757d); color: #fff; }
.info-card::before { content:''; position:absolute; top:0; left:0; width:100%; height:4px;
  background: linear-gradient(90deg, var(--primary), var(--accent)); }
.info-card:hover { transform: translateY(-5px); box-shadow: 0 15px 40px rgba(0,102,204,0.15); }
.info-card i { font-size: 2rem; margin-bottom: var(--space); display: block;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.info-card span {
  display:block; font-size:1.8rem; font-weight:800; margin-bottom: var(--space-xs);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.info-card small { font-size:.9rem; color: var(--text-light); font-weight:500; text-transform: uppercase; letter-spacing:.5px; }

.interactive-features, .modules-and-resources, .progress-section {
  background: var(--card-bg); border-radius: 15px; padding: var(--space-lg);
  margin: var(--space-lg) 0; border: none; box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}
[data-theme="dark"] .interactive-features, .dark-mode .interactive-features,
[data-theme="dark"] .modules-and-resources, .dark-mode .modules-and-resources,
[data-theme="dark"] .progress-section, .dark-mode .progress-section { box-shadow: 0 8px 25px rgba(0,0,0,0.3); }

.features-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space); }
.feature-item {
  display:flex; align-items:center; gap: var(--space);
  padding: var(--space);
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  border-radius:12px; font-size:.9rem; box-shadow: 0 4px 15px rgba(0,0,0,0.05);
  transition: all .3s ease; font-weight:500;
}
[data-theme="dark"] .feature-item, .dark-mode .feature-item { background: linear-gradient(135deg, #495057, #6c757d); color:#fff; }
.feature-item:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,188,212,0.15); }

/* Start Exam Call to Action */
.start-exam-cta {
    text-align: center;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn-start-exam {
    font-size: 1.3rem !important;
    padding: 1.2rem 2.5rem !important;
    border-radius: 50px !important;
    background: linear-gradient(135deg, #00d4ff, #0066cc) !important;
    border: none !important;
    color: white !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 1px !important;
    box-shadow: 0 8px 30px rgba(0, 102, 204, 0.4) !important;
    transition: all 0.3s ease !important;
    position: relative !important;
    overflow: hidden !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    gap: 0.3rem !important;
    min-width: 280px !important;
    margin: 0 auto !important;
}

.btn-start-exam:hover {
    transform: translateY(-5px) scale(1.05) !important;
    box-shadow: 0 15px 40px rgba(0, 102, 204, 0.6) !important;
    background: linear-gradient(135deg, #00bcf2, #0052a3) !important;
}

.btn-start-exam:active {
    transform: translateY(-2px) scale(1.02) !important;
}

.btn-start-exam i {
    font-size: 1.5rem !important;
    margin-right: 0 !important;
}

.btn-start-exam small {
    font-size: 0.75rem !important;
    opacity: 0.9 !important;
    font-weight: 400 !important;
    text-transform: none !important;
    letter-spacing: normal !important;
}

.btn-start-exam::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s ease;
}

.btn-start-exam:hover::before {
    left: 100%;
}

[data-theme="dark"] .start-exam-cta, .dark-mode .start-exam-cta {
    background: linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
    border-color: rgba(255,255,255,0.1);
}

@media (max-width: 768px) {
    .start-exam-cta {
        margin: 1.5rem auto;
        padding: 1rem;
    }
    
    .btn-start-exam {
        font-size: 1.1rem !important;
        padding: 1rem 2rem !important;
        min-width: 240px !important;
        margin: 0 auto !important;
    }
}
.feature-item i { color: var(--accent); font-size:1.1rem; width:20px; text-align:center; }

.modules-resources-grid { display:grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
.modules-section, .resources-section {
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  padding: var(--space-lg); border-radius:12px; box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
[data-theme="dark"] .modules-section, .dark-mode .modules-section, [data-theme="dark"] .resources-section, .dark-mode .resources-section { background: linear-gradient(135deg, #495057, #6c757d); color:#fff; }
.modules-section h4, .resources-section h4 {
  font-size:1rem; font-weight:700; margin-bottom: var(--space); color: var(--text);
  text-transform: uppercase; letter-spacing:.3px;
}
.modules-list { list-style:none; margin-top: var(--space); }
.modules-list li {
  display:flex; align-items:center; gap: var(--space); padding: var(--space-sm) 0;
  font-size:.9rem; border-bottom: 1px solid rgba(0,0,0,0.1); font-weight:500;
}
[data-theme="dark"] .modules-list li, .dark-mode .modules-list li { border-bottom: 1px solid rgba(255,255,255,0.2); }
.modules-list li:last-child { border-bottom:none; }
.modules-list i { color: var(--accent); font-size:.9rem; width:16px; text-align:center; }

.resources-compact { display:flex; flex-direction:column; gap: var(--space-sm); margin-top: var(--space); }
.resource-compact {
  display:flex; align-items:center; gap: var(--space);
  padding: var(--space-sm) var(--space); background:#fff; border-radius:8px; color: var(--text);
  text-decoration:none; font-size:.85rem; transition: all .3s ease; font-weight:500;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.resource-link {
  display:flex;
  align-items:center;
  gap: var(--space-sm);
  padding: 0.65rem 0.85rem;
  background: rgba(255,255,255,0.95);
  border-radius: 10px;
  border: 1px solid rgba(30,60,114,0.12);
  text-decoration: none;
  color: inherit;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.resource-link i {
  color: var(--primary);
  width: 18px;
  text-align: center;
}
.resource-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(30,60,114,0.18);
}
[data-theme="dark"] .resource-link,
.dark-mode .resource-link {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.15);
  color: #fff;
}
[data-theme="dark"] .resource-compact, .dark-mode .resource-compact { background: var(--bg-dark); color:#fff; }
.resource-compact:hover {
  background: linear-gradient(135deg, var(--primary), var(--accent)); color:#fff; transform: translateX(4px);
  box-shadow: 0 4px 15px rgba(0,102,204,0.3);
}

/* Progress (home) */
.progress-summary { display:grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: var(--space); margin-bottom: var(--space-lg); }
.progress-item {
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  padding: var(--space); border-radius:12px; text-align:center; box-shadow: 0 4px 15px rgba(0,0,0,0.05);
  transition: transform .2s ease;
}
[data-theme="dark"] .progress-item, .dark-mode .progress-item { background: linear-gradient(135deg, #495057, #6c757d); color:#fff; }
.progress-item:hover { transform: translateY(-2px); }
.progress-label { font-size:.7rem; color: var(--text-light); text-transform: uppercase; letter-spacing:.5px; margin-bottom: var(--space-xs); font-weight:600; }
.progress-value {
  font-size:1.2rem; font-weight:800;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}

/* Progress Actions */
.progress-actions { display:flex; gap: var(--space); justify-content:center; margin-top: var(--space-lg); }
.btn-progress {
  padding: var(--space-sm) var(--space-lg); border:none; border-radius:12px; cursor:pointer; transition: all .3s ease;
  font-weight:600; font-size:.9rem; text-transform:uppercase; letter-spacing:.3px; display:flex; align-items:center; gap: var(--space-xs);
  background: linear-gradient(135deg, var(--primary), var(--accent)); color:#fff; box-shadow: 0 4px 15px rgba(0,102,204,0.2);
  position:relative; overflow:hidden;
}
.btn-progress::before { content:''; position:absolute; inset:0; left:-100%; background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent); transition:left .5s; }
.btn-progress:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,102,204,0.3); }
.btn-progress:hover::before { left:100%; }
.btn-progress i { font-size:.9rem; }

[data-theme="dark"] .btn-progress, .dark-mode .btn-progress { box-shadow: 0 4px 15px rgba(0,0,0,0.3); }
[data-theme="dark"] .btn-progress:hover, .dark-mode .btn-progress:hover { box-shadow: 0 8px 25px rgba(0,0,0,0.4); }

/* Start Exam button */
#start-exam {
  margin-top: var(--space-xl); padding: var(--space-lg) var(--space-xl); font-size:1.1rem; font-weight:700;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color:#fff; border:none; border-radius:25px;
  cursor:pointer; transition: all .3s ease; box-shadow: 0 8px 25px rgba(0,102,204,0.3);
  text-transform: uppercase; letter-spacing:.5px; position:relative; overflow:hidden;
}
#start-exam::before { content:''; position:absolute; inset:0; left:-100%; background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent); transition:left .5s; }
#start-exam:hover { transform: translateY(-3px); box-shadow: 0 12px 35px rgba(0,102,204,0.4); }
#start-exam:hover::before { left:100%; }

/* ===== EXAM SCREEN ===== */
#exam-screen {
  background: var(--card-bg); border-radius: 15px; margin: var(--space) auto; box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  border:none; max-width:800px;
}
[data-theme="dark"] #exam-screen,
.dark-mode #exam-screen {
  background: #1e293b;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.exam-header {
  background: linear-gradient(135deg, var(--primary), var(--accent)); color:#fff;
  padding: var(--space) var(--space-lg); display:flex; justify-content:space-between; align-items:center;
  border-radius: 15px 15px 0 0; box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.exam-progress { display:flex; align-items:center; gap: var(--space-lg); }
.exam-title { font-size:1.2rem; font-weight:600; margin:0; text-shadow: 0 1px 2px rgba(0,0,0,0.2); }

.question-counter, #question-counter {
  background: rgba(255,255,255,0.2); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  padding: var(--space-xs) var(--space-sm); border-radius: 20px; font-size:.85rem; font-weight:500; color:#fff;
  border: 1px solid rgba(255,255,255,0.1);
}

.progress-bar { width:150px; height:6px; background: rgba(255,255,255,0.2); border-radius:3px; overflow:hidden; -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
.progress-fill { height:100%; background: linear-gradient(90deg, #00ff88, #00d4ff); transition: width .3s ease; box-shadow: 0 0 10px rgba(0,255,136,0.3); }

/* Timer (aligns with HTML .exam-timer) */
.exam-timer {
  background: rgba(255,255,255,0.2); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); color:#fff;
  padding: var(--space-xs) var(--space-sm); border-radius:20px; font-weight:600; font-size:.9rem;
  display:flex; align-items:center; gap: var(--space-xs); border:1px solid rgba(255,255,255,0.1);
  font-variant-numeric: tabular-nums;
}
.exam-timer.warn  { background: rgba(255,193,7,0.9); color: var(--text); animation: pulse 2s infinite; }
.exam-timer.danger{ background: rgba(220,53,69,0.9); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:.7;} }

.question-container { padding: var(--space-lg) var(--space-xl); background: var(--card-bg); position:relative; }
.question-header { display:flex; justify-content:space-between; align-items:center; margin-bottom: var(--space); padding-bottom: var(--space-sm); border-bottom:1px solid var(--border-light); }
.question-number { font-size:.9rem; font-weight:600; color: var(--accent); display:flex; align-items:center; gap: var(--space-xs); }
.question-module  { background: var(--bg-gray); padding: var(--space-xs) var(--space-sm); border-radius: var(--radius); font-size:.7rem; color: var(--text-light); border:1px solid var(--border-light); }

/* .question-text — authoritative version in exam-enhancements.css */

/* Options container (match HTML id/class) */
.options-container, .options {
  margin-bottom: 0;
  padding-bottom: var(--space-xs);
  display:flex; flex-direction:column; gap: var(--space-sm);
}

/* Option card (single definition) */
.option { margin:0; }
.option input[type="radio"], .option input[type="checkbox"] { display:none; }

/* .option label — authoritative version in exam-enhancements.css */

.option label::before {
  content:''; width:18px; height:18px; border:2px solid var(--border); border-radius:50%; background:#fff;
  flex-shrink:0; margin-top:2px; transition: all .3s ease;
}
.option input[type="checkbox"] + label::before { border-radius:4px; }

/* .option checked states — authoritative version in exam-enhancements.css */

/* Controls under options */
.question-controls {
  margin-top: calc(var(--space-xl) * 1);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-light);
  display:flex; gap: var(--space-lg); justify-content:center; align-items:center;
  min-height: 100px; /* garante “meia altura” visual */
}

/* Dedicated CTA buttons used here (keep your gradients) */
.mark-review-btn, .show-answer-btn { /* if you use these classes elsewhere */
  padding: var(--space-sm) var(--space-lg);
  border-radius: 25px; border:none; cursor:pointer; transition: all .3s ease;
  font-size:.85rem; font-weight:700; display:flex; align-items:center; gap: var(--space-xs);
  text-transform: uppercase; letter-spacing:.5px; box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.mark-review-btn { background: linear-gradient(135deg, #ffc107, #ffeb3b); color:#333; }
.mark-review-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(255,193,7,0.3); }
.mark-review-btn.marked { background: linear-gradient(135deg, #ff9800, #ffc107); animation: marked-pulse 2s infinite; }
@keyframes marked-pulse { 0%,100%{transform:scale(1);} 50%{transform:scale(1.05);} }
.show-answer-btn { background: linear-gradient(135deg, var(--info), #00bcd4); color:#fff; }
.show-answer-btn:hover { background: linear-gradient(135deg, var(--primary), var(--accent)); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,188,212,0.3); }

/* .navigation-buttons — authoritative version in exam-enhancements.css */

/* ===== ANSWER FEEDBACK ===== */
#answer-feedback {
  position:absolute; top:100%; left:0; right:0; background: var(--card-bg); border:none; border-radius:20px;
  padding: var(--space-xl); box-shadow: 0 20px 60px rgba(0,0,0,0.3); width:100%; z-index:1000;
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); animation: feedbackSlideIn .3s ease-out; margin-top: var(--space-xl);
}
[data-theme="dark"] #answer-feedback, .dark-mode #answer-feedback { box-shadow: 0 20px 60px rgba(0,0,0,0.5); }

.feedback-header { display:flex; justify-content:space-between; align-items:center; margin-bottom: var(--space-lg); padding-bottom: var(--space); border-bottom:2px solid var(--border-light); }
.feedback-status {
  font-weight:700; padding: var(--space-sm) var(--space-lg); border-radius:25px; font-size:.9rem; text-transform:uppercase; letter-spacing:.5px;
  display:flex; align-items:center; gap: var(--space-xs);
}
.feedback-status.correct { background: linear-gradient(135deg, var(--success), #22c55e); color:#fff; box-shadow: 0 4px 15px rgba(40,167,69,0.3); }
.feedback-status.incorrect { background: linear-gradient(135deg, var(--error), #ef4444); color:#fff; box-shadow: 0 4px 15px rgba(220,53,69,0.3); }

.close-feedback {
  background: rgba(108,117,125,0.1); border:none; font-size:1.5rem; cursor:pointer; color: var(--text-light);
  width:35px; height:35px; border-radius:50%; display:grid; place-items:center; transition: all .2s ease;
}
.close-feedback:hover { background: rgba(220,53,69,0.1); color: var(--error); transform: scale(1.1); }

.feedback-content {
  font-size:1rem; line-height:1.5; padding: var(--space-lg);
  background: linear-gradient(135deg, #f8f9fa, #e9ecef); border-radius:12px; border-left:4px solid var(--accent);
}
[data-theme="dark"] .feedback-content, .dark-mode .feedback-content { background: linear-gradient(135deg, #495057, #6c757d); color:#fff; }

.correct-answer { margin-bottom: var(--space-lg); }
.correct-answer h4 { font-size:1rem; font-weight:700; margin-bottom: var(--space); color: var(--success); text-transform:uppercase; letter-spacing:.5px; }
.correct-answer ol { list-style:none; padding:0; margin:0; counter-reset:item; }
.correct-answer li {
  padding: var(--space-sm) var(--space-lg); margin-bottom: var(--space-sm);
  background: rgba(40,167,69,0.1); border-radius:8px; border-left:3px solid var(--success); font-weight:500; position:relative;
}
.correct-answer li::before { content: counter(item) "."; counter-increment:item; font-weight:700; color: var(--success); margin-right: var(--space-sm); }
[data-theme="dark"] .correct-answer li, .dark-mode .correct-answer li { background: rgba(40,167,69,0.2); }

/* Option result states — moved to exam-enhancements.css */

/* ===== RESULTS SCREEN ===== */
#results-screen { padding: var(--space); min-height:100vh; padding-top:60px; }
.results-container {
  background: transparent; border-radius:20px; margin:0 auto; max-width:1100px; width:100%;
}
[data-theme="dark"] .results-container, .dark-mode .results-container { box-shadow:none; }

.results-shell {
  background: rgba(255,255,255,0.75);
  border-radius:30px;
  padding: var(--space-xl);
  box-shadow: 0 30px 80px rgba(14,30,68,0.15);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  display:flex;
  flex-direction:column;
  gap: var(--space-xl);
}
[data-theme="dark"] .results-shell, .dark-mode .results-shell {
  background: rgba(20,24,33,0.85);
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
}

.results-layout {
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.results-summary-card {
  background: linear-gradient(160deg, #0f172a, #1d4ed8);
  color:#fff;
  border-radius:24px;
  padding: var(--space-xl);
  position:relative;
  overflow:hidden;
  box-shadow: 0 25px 60px rgba(15,23,42,0.4);
}
.results-summary-card::after {
  content:'';
  position:absolute;
  inset:20px;
  border:1px solid rgba(255,255,255,0.1);
  border-radius:20px;
  pointer-events:none;
}
.results-summary-card.failed {
  background: linear-gradient(160deg, #2d0f24, #b91c1c);
}
.summary-top-row {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: var(--space);
  margin-bottom: var(--space-lg);
}
#results-screen .exam-name-badge {
  background: rgba(255,255,255,0.18);
  color: #fff;
  padding: 6px 16px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,0.25);
  font-size:0.85rem;
  font-weight:600;
  margin:0;
}
#results-screen .results-summary-card.failed .exam-name-badge {
  border-color: rgba(255,255,255,0.4);
}
.result-status-chip {
  padding:6px 18px;
  border-radius:999px;
  font-weight:700;
  letter-spacing:0.08em;
  text-transform:uppercase;
  font-size:0.85rem;
  background: rgba(255,255,255,0.15);
  border:1px solid rgba(255,255,255,0.25);
}
.result-status-chip.passed { color:#bbf7d0; border-color: rgba(187,247,208,0.4); }
.result-status-chip.failed { color:#fecaca; border-color: rgba(254,202,202,0.4); }

.exam-name-pill {
  padding:6px 16px;
  border-radius:999px;
  background: rgba(255,255,255,0.12);
  border:1px solid rgba(255,255,255,0.2);
  font-weight:600;
  font-size:0.85rem;
}

.summary-visuals {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: var(--space-xl);
  position:relative;
  z-index:1;
}

.score-ring {
  --score-deg: 0deg;
  width: 200px;
  height: 200px;
  border-radius:50%;
  background: conic-gradient(#34d399 var(--score-deg), rgba(255,255,255,0.08) 0deg);
  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.25);
}
.results-summary-card.failed .score-ring {
  background: conic-gradient(#f87171 var(--score-deg), rgba(255,255,255,0.08) 0deg);
}
.score-ring-inner {
  width: 140px;
  height: 140px;
  border-radius:50%;
  background: rgba(15,23,42,0.85);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap: var(--space-xs);
  text-align:center;
  padding: var(--space);
}
.results-summary-card.failed .score-ring-inner {
  background: rgba(24,10,15,0.85);
}
.score-percentage {
  font-size:3rem;
  font-weight:900;
  color:#fff;
  text-shadow:none;
}
.score-label { font-size:0.85rem; opacity:0.8; letter-spacing:0.08em; text-transform:uppercase; }

.status-icon {
  width:96px;
  height:96px;
  border-radius:24px;
  background: rgba(255,255,255,0.12);
  display:grid;
  place-items:center;
  border:1px solid rgba(255,255,255,0.2);
  animation: float 8s ease-in-out infinite;
}
.status-icon i { font-size:2.5rem; color:#fff; }
.status-icon.failed { background: rgba(255,255,255,0.08); }


.summary-metrics {
  margin: var(--space-lg) 0;
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: var(--space);
  text-align:center;
}
.summary-metric {
  background: rgba(255,255,255,0.08);
  padding: var(--space);
  border-radius:16px;
  border:1px solid rgba(255,255,255,0.12);
}
.summary-metric .metric-label {
  font-size:0.75rem;
  text-transform:uppercase;
  letter-spacing:0.08em;
  opacity:0.7;
}
.summary-metric .metric-value {
  font-size:1.6rem;
  font-weight:800;
  color:#fff;
}

.summary-divider {
  height:1px;
  background: rgba(255,255,255,0.1);
  margin-bottom: var(--space-lg);
}

.summary-meta {
  display:flex;
  justify-content:space-between;
  gap: var(--space-lg);
  font-size:0.9rem;
  text-transform:uppercase;
  letter-spacing:0.06em;
}
.summary-meta .meta-label { display:block; font-size:0.75rem; opacity:0.7; margin-bottom:4px; }
.summary-meta strong { font-size:1.2rem; }

.results-insights-card {
  background: rgba(255,255,255,0.92);
  border-radius:24px;
  padding: var(--space-xl);
  box-shadow: 0 20px 50px rgba(15,23,42,0.08);
  display:flex;
  flex-direction:column;
  gap: var(--space-lg);
}
[data-theme="dark"] .results-insights-card, .dark-mode .results-insights-card {
  background: rgba(18,24,38,0.9);
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
  color:#fff;
}
.insights-header h3 {
  font-size:1.3rem;
  margin:0;
  display:flex;
  align-items:center;
  gap: var(--space-sm);
}
.insights-header p {
  margin:4px 0 0;
  color: var(--text-light);
  font-size:0.9rem;
}
[data-theme="dark"] .insights-header p, .dark-mode .insights-header p { color: rgba(255,255,255,0.7); }

.insight-progress { display:flex; flex-direction:column; gap: var(--space-xs); }
.insight-label-row {
  display:flex;
  justify-content:space-between;
  font-size:0.85rem;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.05em;
}
.insight-value { font-weight:800; }
.insight-bar {
  width:100%;
  height:10px;
  background: rgba(15,23,42,0.08);
  border-radius:999px;
  overflow:hidden;
}
[data-theme="dark"] .insight-bar, .dark-mode .insight-bar { background: rgba(255,255,255,0.08); }
.insight-bar .stat-progress {
  height:100%;
  border-radius:999px;
  box-shadow:none;
  animation:none;
}
.insight-bar .stat-progress::after { display:none; }
.insight-correct { background: linear-gradient(90deg, #22c55e, #4ade80); }
.insight-incorrect { background: linear-gradient(90deg, #f97316, #ef4444); }

.insights-list {
  list-style:none;
  padding:0;
  margin:0;
  display:flex;
  flex-direction:column;
  gap: var(--space-sm);
}
.insights-list li {
  display:flex;
  justify-content:space-between;
  padding: var(--space-sm) var(--space);
  border-radius:16px;
  background: rgba(15,23,42,0.04);
  font-weight:600;
}
[data-theme="dark"] .insights-list li, .dark-mode .insights-list li { background: rgba(255,255,255,0.05); }

.insight-hint {
  display:flex;
  align-items:center;
  gap: var(--space-sm);
  font-size:0.85rem;
  padding: var(--space-sm) var(--space);
  border-radius:14px;
  background: rgba(59,130,246,0.12);
  color: #1d4ed8;
}
[data-theme="dark"] .insight-hint, .dark-mode .insight-hint {
  background: rgba(37,99,235,0.2);
  color: #93c5fd;
}

.results-actions-modern {
  padding: var(--space-xl);
  background: rgba(15,23,42,0.05);
  border-radius:22px;
  border:1px solid rgba(15,23,42,0.08);
  display:flex;
  justify-content:center;
  gap: var(--space-lg);
  flex-wrap:wrap;
}
[data-theme="dark"] .results-actions-modern, .dark-mode .results-actions-modern {
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.08);
}

/* Quick Certificate Section */
.quick-certificate-section {
    padding: var(--space-lg);
    background: linear-gradient(135deg, rgba(0,102,204,0.05), rgba(0,188,242,0.05));
    border: 1px solid rgba(0,102,204,0.1);
    border-radius: 20px;
    margin: var(--space-lg) 0;
}

.certificate-quick-card {
    background: linear-gradient(135deg, #ffffff, #f8fcff);
    border-radius: 16px;
    padding: var(--space-xl);
    box-shadow: 0 8px 30px rgba(0,102,204,0.15);
    border: 2px solid rgba(0,102,204,0.1);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    position: relative;
    overflow: hidden;
}

.certificate-quick-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #0066cc, #00bcf2, #0066cc);
    animation: certificateShine 3s infinite;
}

@keyframes certificateShine {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.certificate-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #0066cc, #00bcf2);
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: white;
    font-size: 2rem;
    flex-shrink: 0;
    box-shadow: 0 8px 20px rgba(0,102,204,0.3);
}

.certificate-content {
    flex: 1;
}

.certificate-content h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #0066cc;
    margin-bottom: var(--space-xs);
}

.certificate-content p {
    color: var(--text-light);
    margin-bottom: var(--space-lg);
    font-size: 0.95rem;
}

.certificate-actions {
    display: flex;
    gap: var(--space);
    flex-wrap: wrap;
}

.btn-certificate-download,
.btn-certificate-view {
    padding: var(--space) var(--space-lg);
    border-radius: 25px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    text-decoration: none;
    flex-direction: column;
    min-width: 120px;
}

.btn-certificate-download {
    background: linear-gradient(135deg, #0066cc, #00bcf2);
    color: white;
    box-shadow: 0 4px 15px rgba(0,102,204,0.3);
}

.btn-certificate-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,102,204,0.4);
    background: linear-gradient(135deg, #0052a3, #00a4ef);
}

.btn-certificate-view {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    color: #0066cc;
    border: 2px solid rgba(0,102,204,0.2);
}

.btn-certificate-view:hover {
    transform: translateY(-3px);
    background: linear-gradient(135deg, #e9ecef, #dee2e6);
    border-color: rgba(0,102,204,0.4);
}

.btn-certificate-download i,
.btn-certificate-view i {
    font-size: 1.1rem;
}

.btn-certificate-download small,
.btn-certificate-view small {
    font-size: 0.7rem;
    opacity: 0.8;
    font-weight: 400;
}

[data-theme="dark"] .certificate-quick-card, .dark-mode .certificate-quick-card {
    background: linear-gradient(135deg, #343a40, #495057);
    border-color: rgba(0,188,242,0.2);
}

[data-theme="dark"] .certificate-content h4, .dark-mode .certificate-content h4 {
    color: #00bcf2;
}

[data-theme="dark"] .certificate-content p, .dark-mode .certificate-content p {
    color: #adb5bd;
}

[data-theme="dark"] .btn-certificate-view, .dark-mode .btn-certificate-view {
    background: linear-gradient(135deg, #495057, #6c757d);
    color: #00bcf2;
    border-color: rgba(0,188,242,0.3);
}

[data-theme="dark"] .btn-certificate-view:hover, .dark-mode .btn-certificate-view:hover {
    background: linear-gradient(135deg, #6c757d, #868e96);
}

@media (max-width: 768px) {
    .certificate-quick-card {
        flex-direction: column;
        text-align: center;
        padding: var(--space-lg);
    }
    
    .certificate-actions {
        justify-content: center;
    }
    
    .btn-certificate-download,
    .btn-certificate-view {
        min-width: 140px;
    }
}

@media (max-width: 640px) {
  .summary-visuals { flex-direction:column; }
  .score-ring { width:160px; height:160px; }
  .score-ring-inner { width:120px; height:120px; }
  .summary-meta { flex-direction:column; align-items:flex-start; }
}

/* Performance Dashboard */
.performance-dashboard { padding: var(--space-xl); background: linear-gradient(135deg, #f8f9fa, #e9ecef); border-bottom:1px solid var(--border-light); }
[data-theme="dark"] .performance-dashboard, .dark-mode .performance-dashboard { background: linear-gradient(135deg, #495057, #6c757d); }
.dashboard-title {
  font-size:1.5rem; font-weight:700; margin-bottom: var(--space-xl); color: var(--text);
  display:flex; align-items:center; gap: var(--space); text-transform:uppercase; letter-spacing:.5px;
}
[data-theme="dark"] .dashboard-title, .dark-mode .dashboard-title { color:#fff; }
.dashboard-title i { color: var(--accent); font-size:1.8rem; }

.stats-grid-modern { display:grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--space-lg); }
.stat-card-modern {
  background:#fff; border-radius:15px; padding: var(--space-xl); box-shadow: 0 8px 25px rgba(0,0,0,0.1);
  transition: all .3s ease; position:relative; overflow:hidden; display:flex; align-items:center; gap: var(--space-lg);
}
[data-theme="dark"] .stat-card-modern, .dark-mode .stat-card-modern { background: var(--bg-dark); color:#fff; }
.stat-card-modern::before { content:''; position:absolute; top:0; left:0; width:100%; height:4px; background: var(--text-light); }
.stat-card-modern.correct::before   { background: linear-gradient(90deg, var(--success), #22c55e); }
.stat-card-modern.incorrect::before { background: linear-gradient(90deg, var(--error), #ef4444); }
.stat-card-modern.time::before      { background: linear-gradient(90deg, var(--info), #0ea5e9); }
.stat-card-modern:hover { transform: translateY(-5px); box-shadow: 0 15px 40px rgba(0,0,0,0.15); }

.stat-icon { width:60px; height:60px; border-radius:15px; display:grid; place-items:center; flex-shrink:0; }
.stat-card-modern.correct .stat-icon   { background: linear-gradient(135deg, var(--success), #22c55e); color:#fff; }
.stat-card-modern.incorrect .stat-icon { background: linear-gradient(135deg, var(--error), #ef4444); color:#fff; }
.stat-card-modern.time .stat-icon      { background: linear-gradient(135deg, var(--info), #0ea5e9); color:#fff; }
.stat-icon i { font-size:1.5rem; }

.stat-content { flex:1; }
.stat-number { font-size:2.2rem; font-weight:800; display:block; margin-bottom: var(--space-xs); }
.stat-card-modern.correct .stat-number   { background: linear-gradient(135deg, var(--success), #22c55e); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.stat-card-modern.incorrect .stat-number { background: linear-gradient(135deg, var(--error), #ef4444); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.stat-card-modern.time .stat-number      { background: linear-gradient(135deg, var(--info), #0ea5e9); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.stat-label { font-size:.9rem; color: var(--text-light); text-transform:uppercase; font-weight:600; letter-spacing:.5px; margin-bottom: var(--space); }
.stat-bar { width:100%; height:6px; background: rgba(0,0,0,0.1); border-radius:3px; overflow:hidden; margin-top: var(--space-sm); }
.stat-progress { height:100%; border-radius:3px; transition: width .8s ease-out; position:relative; overflow:hidden; }
.stat-progress::after { content:''; position:absolute; inset:0; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent); animation: shimmer 2s infinite; }
.correct-progress { background: linear-gradient(90deg, var(--success), #22c55e); }
.incorrect-progress { background: linear-gradient(90deg, var(--error), #ef4444); }
.time-indicator { margin-top: var(--space-sm); }
.time-remaining { font-size:.8rem; color: var(--success); font-weight:600; padding: var(--space-xs) var(--space-sm); background: rgba(40,167,69,0.1); border-radius:12px; }

/* Module Performance */
.module-performance { padding: var(--space-xl); background: var(--card-bg); }
.section-title { font-size:1.4rem; font-weight:700; margin-bottom: var(--space-lg); color: var(--text); display:flex; align-items:center; gap: var(--space); text-transform:uppercase; letter-spacing:.5px; }
.section-title i { color: var(--accent); font-size:1.6rem; }

.module-stats-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-lg); margin: var(--space-xl) 0; }
.module-stat {
  background:#fff; border-radius:16px; padding: var(--space-lg); box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  border-left:4px solid transparent; transition: all .3s ease; position:relative; overflow:hidden;
}
.module-stat::before { content:''; position:absolute; top:0; left:0; right:0; height:4px; background: linear-gradient(90deg, var(--primary), var(--accent)); }
.module-stat:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.module-stat h3 { font-size:.9rem; font-weight:600; color: var(--text-light); margin-bottom: var(--space-sm); text-transform:uppercase; letter-spacing:.5px; }
.module-score { font-size:2rem; font-weight:700; color: var(--primary); margin-bottom: var(--space-xs); }
.module-detail { font-size:.85rem; color: var(--text-light); }
[data-theme="dark"] .module-stat, .dark-mode .module-stat { background: var(--card-bg); box-shadow: 0 4px 20px rgba(0,0,0,0.3); }
[data-theme="dark"] .module-score, .dark-mode .module-score { color: var(--accent); }

/* Detailed Review */
.detailed-review-section { padding: var(--space-xl); background: linear-gradient(135deg, #f8f9fa, #e9ecef); border-top:1px solid var(--border-light); }
[data-theme="dark"] .detailed-review-section, .dark-mode .detailed-review-section { background: linear-gradient(135deg, #495057, #6c757d); }
.section-header { display:flex; justify-content:space-between; align-items:center; margin-bottom: var(--space-lg); padding-bottom: var(--space); border-bottom:2px solid var(--border-light); }
.review-filters { display:flex; gap: var(--space-sm); background:#fff; padding: var(--space-xs); border-radius:25px; box-shadow: inset 0 2px 4px rgba(0,0,0,0.1); }
[data-theme="dark"] .review-filters, .dark-mode .review-filters { background: var(--bg-dark); }
.filter-btn {
  padding: var(--space-sm) var(--space-lg); border:none; border-radius:20px; background:transparent; cursor:pointer; transition: all .3s ease;
  font-size:.85rem; font-weight:600; text-transform:uppercase; letter-spacing:.3px; color: var(--text-light); display:flex; align-items:center; gap: var(--space-xs);
}
.filter-btn.active { background: linear-gradient(135deg, var(--primary), var(--accent)); color:#fff; transform: translateY(-1px); box-shadow: 0 4px 15px rgba(0,102,204,0.3); }
.filter-btn:hover:not(.active) { background: rgba(0,102,204,0.1); color: var(--primary); }
.detailed-answers-grid { display:flex; flex-direction:column; gap: var(--space); }

/* Results actions modern */
.results-actions-modern {
  padding: var(--space-xl);
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  border-top:1px solid var(--border-light);
  display:flex; justify-content:center; gap: var(--space-lg); flex-wrap:wrap;
}
[data-theme="dark"] .results-actions-modern, .dark-mode .results-actions-modern { background: linear-gradient(135deg, #495057, #6c757d); }

.certificate-btn, .restart-btn, .study-btn, .home-btn {
  padding: var(--space-lg) var(--space-xl); border:none; border-radius:15px; cursor:pointer; transition: all .3s ease;
  font-weight:700; text-transform:uppercase; letter-spacing:.5px; display:flex; flex-direction:column; align-items:center; gap: var(--space);
  min-width:180px; box-shadow: 0 8px 25px rgba(0,0,0,0.15); position:relative; overflow:hidden;
}
.certificate-btn { background: linear-gradient(135deg, #ffd700, #ffed4e); color:#333; }
.restart-btn     { background: linear-gradient(135deg, var(--primary), var(--accent)); color:#fff; }
.study-btn       { background: linear-gradient(135deg, var(--success), #22c55e); color:#fff; }
.home-btn        { background: linear-gradient(135deg, var(--secondary), #e9ecef); color: var(--text); border: 2px solid var(--border-light); }
.certificate-btn:hover, .restart-btn:hover, .study-btn:hover, .home-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 35px rgba(0,0,0,0.2); }

.btn-icon { width:50px; height:50px; border-radius:50%; background: rgba(255,255,255,0.2); display:grid; place-items:center; -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
.btn-icon i { font-size:1.5rem; }
.btn-content { text-align:center; }
.btn-title { font-size:1rem; font-weight:700; margin-bottom: var(--space-xs); }
.btn-subtitle { font-size:.8rem; opacity:.8; font-weight:400; }

[data-theme="dark"] .home-btn, .dark-mode .home-btn { background: linear-gradient(135deg, var(--card-bg), #495057); color: #fff; border: 2px solid var(--border); }

/* Progress tracking (results) */
.progress-stats-section { background: var(--card-bg); border-radius: var(--radius-lg); margin: var(--space-lg) 0; box-shadow: var(--shadow); border:1px solid var(--border-light); overflow:hidden; }
.progress-stats-header { background: var(--bg-gray); padding: var(--space) var(--space-lg); display:flex; justify-content:space-between; align-items:center; border-bottom:1px solid var(--border-light); }
.progress-overview { display:grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: var(--space); padding: var(--space-lg); background: var(--bg-gray); border-bottom:1px solid var(--border-light); }
.progress-metric { text-align:center; padding: var(--space); background: var(--card-bg); border-radius: var(--radius); transition: transform .2s ease; border:1px solid var(--border-light); }
.progress-metric:hover { transform: translateY(-1px); }
.progress-metric.positive .metric-value { color: var(--success); }
.progress-metric.negative .metric-value { color: var(--error); }
.metric-value { font-size:1.3rem; font-weight:700; margin-bottom: var(--space-xs); }
.metric-label { font-size:.7rem; color: var(--text-light); text-transform: uppercase; letter-spacing:.3px; }
.progress-chart { padding: var(--space-lg); min-height:150px; }
.chart-container { display:flex; align-items:flex-end; justify-content:center; gap: var(--space-sm); height:100px; }
.chart-bar { min-width:30px; background: var(--text-light); border-radius: var(--radius) var(--radius) 0 0; position:relative; transition: all .3s ease; cursor:pointer; }
.chart-bar:hover { transform: translateY(-2px); }
.chart-bar.passed { background: linear-gradient(to top, var(--success), #22c55e); }
.chart-bar.failed { background: linear-gradient(to top, var(--error), #ef4444); }
.bar-value {
  position:absolute; top:-20px; left:50%; transform:translateX(-50%); font-size:.65rem; font-weight:600;
  background: var(--card-bg); padding: var(--space-xs); border-radius: var(--radius); white-space:nowrap; opacity:0; transition: opacity .2s ease; border:1px solid var(--border-light);
}
.chart-bar:hover .bar-value { opacity:1; }
.bar-label { position:absolute; bottom:-15px; left:50%; transform:translateX(-50%); font-size:.65rem; color: var(--text-light); white-space:nowrap; }
.recent-attempts { padding: var(--space-lg); border-top:1px solid var(--border-light); }
.recent-attempts h4 { margin:0 0 var(--space) 0; font-size:.9rem; font-weight:600; }
.attempts-list { display:flex; flex-direction:column; gap: var(--space-sm); }
.attempt-item {
  display:flex; justify-content:space-between; align-items:center; padding: var(--space-sm);
  background: var(--bg-gray); border-radius: var(--radius); border-left:3px solid var(--text-light); font-size:.8rem;
}
.attempt-item.passed { border-left-color: var(--success); }
.attempt-item.failed { border-left-color: var(--error); }
.attempt-date { color: var(--text-light); }
.attempt-score { font-weight:600; }
.attempt-status { display:flex; align-items:center; gap: var(--space-xs); font-weight:500; }
.attempt-status i { font-size:.7rem; }
.progress-attempt-actions { display:flex; gap: var(--space-sm); flex-wrap:wrap; margin-top: var(--space-sm); }
.progress-attempt-btn {
  display:inline-flex; align-items:center; gap: var(--space-xs); padding: 8px 12px;
  border:0; border-radius: var(--radius); font-weight:600; cursor:pointer; color:#fff;
}
.progress-attempt-btn.primary { background: linear-gradient(135deg, var(--primary), var(--accent)); }
.progress-attempt-btn.secondary { background: var(--success); }
.progress-attempt-btn:disabled { background: var(--text-light); cursor:not-allowed; opacity:.7; }

/* ===== CERTIFICATE ===== */
#certificate-screen { background: var(--bg); padding: var(--space-xl); text-align:center; }
.certificate-container {
  background: var(--card-bg); border:2px solid var(--primary); border-radius: var(--radius-lg);
  padding: var(--space-xl); max-width:600px; margin:0 auto; box-shadow: var(--shadow-lg);
}

/* ===== ANSWER REVIEW CARDS (review page) ===== */
.answer-review-card {
  background:#fff; border-radius:12px; padding: var(--space-lg); margin-bottom: var(--space-lg); box-shadow: 0 2px 15px rgba(0,0,0,0.08);
  border-left:4px solid transparent; transition: all .3s ease;
}
.answer-review-card.correct   { border-left-color:#28a745; background: linear-gradient(135deg, #f8fff9, #f1f9f2); }
.answer-review-card.incorrect { border-left-color:#dc3545; background: linear-gradient(135deg, #fff8f8, #fef2f2); }
.answer-header { display:flex; justify-content:space-between; align-items:center; margin-bottom: var(--space-lg); padding-bottom: var(--space-sm); border-bottom:1px solid var(--border-light); }
.answer-status-badge { padding: var(--space-xs) var(--space-sm); border-radius:20px; font-size:.85rem; font-weight:600; display:flex; align-items:center; gap: var(--space-xs); }
.answer-status-badge.correct { background:#28a745; color:#fff; }
.answer-status-badge.incorrect { background:#dc3545; color:#fff; }
.answer-details { margin-top: var(--space-lg); }
.answer-option { padding: var(--space-sm) var(--space-lg); margin: var(--space-xs) 0; border-radius:8px; background:#f8f9fa; border-left:3px solid transparent; }
.answer-option.correct-answer { background: linear-gradient(135deg, #d4edda, #c3e6cb); border-left-color:#28a745; color:#155724; font-weight:600; }
.answer-option.user-answer { background: linear-gradient(135deg, #f8d7da, #f5c6cb); border-left-color:#dc3545; color:#721c24; font-weight:600; }
.answer-option.user-correct { background: linear-gradient(135deg, #d4edda, #c3e6cb); border-left-color:#28a745; color:#155724; font-weight:600; }
[data-theme="dark"] .answer-review-card, .dark-mode .answer-review-card { background: var(--card-bg); box-shadow: 0 2px 15px rgba(0,0,0,0.3); }
[data-theme="dark"] .answer-review-card.correct, .dark-mode .answer-review-card.correct   { background: linear-gradient(135deg, #1e3a20, #2d5a31); }
[data-theme="dark"] .answer-review-card.incorrect, .dark-mode .answer-review-card.incorrect { background: linear-gradient(135deg, #3a1e1e, #5a2d2d); }
[data-theme="dark"] .answer-option, .dark-mode .answer-option { background: rgba(255,255,255,0.05); }
[data-theme="dark"] .answer-option.correct-answer, .dark-mode .answer-option.correct-answer { background: linear-gradient(135deg, rgba(40,167,69,0.2), rgba(40,167,69,0.1)); color:#90ee90; }
[data-theme="dark"] .answer-option.user-answer, .dark-mode .answer-option.user-answer    { background: linear-gradient(135deg, rgba(220,53,69,0.2), rgba(220,53,69,0.1)); color:#ffb3ba; }
[data-theme="dark"] .answer-option.user-correct, .dark-mode .answer-option.user-correct   { background: linear-gradient(135deg, rgba(40,167,69,0.2), rgba(40,167,69,0.1)); color:#90ee90; }

/* Explanation Section */
.explanation-section { margin-top: var(--space-lg); padding-top: var(--space-lg); border-top:1px solid var(--border-light); }
.explanation-section h4 { color: var(--primary); font-size:.95rem; margin-bottom: var(--space-sm); display:flex; align-items:center; gap: var(--space-xs); }
.explanation-content { background: linear-gradient(135deg, #e3f2fd, #f8f9fa); padding: var(--space-lg); border-radius:8px; border-left:4px solid var(--info); line-height:1.6; }
.explanation-content img { max-width:100%; height:auto; border-radius:8px; margin: var(--space) auto; display:block; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
[data-theme="dark"] .explanation-content, .dark-mode .explanation-content { background: linear-gradient(135deg, rgba(33,150,243,0.1), rgba(255,255,255,0.05)); color: var(--text); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .container { padding: var(--space-xs); }
  .hero { padding: var(--space-lg); }
  #exam-screen, .results-container { margin: var(--space-xs); }
  .exam-header { flex-direction:column; gap: var(--space); text-align:center; }
  .exam-progress { gap: var(--space); }
  .progress-bar { width:120px; }
  .navigation-buttons { flex-direction:column; gap: var(--space); }
  .score-summary { grid-template-columns: repeat(2, 1fr); }
  .module-grid { grid-template-columns: 1fr; }
  .analysis-header { flex-direction:column; gap: var(--space); }
  .results-actions { flex-direction:column; }
  .modules-resources-grid { grid-template-columns: 1fr; }
  .progress-overview { grid-template-columns: repeat(2, 1fr); }
  .attempt-item { flex-direction:column; align-items:flex-start; gap: var(--space-xs); }
  #answer-feedback { margin-top: var(--space); padding: var(--space-lg); }
  .correct-answer li { padding: var(--space-xs) var(--space); font-size:.9rem; }
}
@media (max-width: 480px) {
  .exam-info { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .score-summary { grid-template-columns: 1fr; }
  .progress-summary { grid-template-columns: repeat(2, 1fr); }
}

/* ===== ACCESSIBILIDADE ===== */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }

.is-hidden { display: none; }

/* Focus styles */
button:focus, input:focus, select:focus, textarea:focus, a:focus {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

/* High contrast support */
@media (prefers-contrast: high) {
  :root { --border:#000; --border-light:#666; --shadow: 0 2px 4px rgba(0,0,0,0.5); }
  [data-theme="dark"], .dark-mode { --border:#fff; --border-light:#ccc; }
}

/* ===== PRINT STYLES ===== */
@media print {
    .theme-controls, .theme-toggle, .navigation-buttons,
    .question-controls, .exam-timer, .sidebar,
    #mark-review-btn, #show-answer-btn, #finish-exam,
    .btn-start-exam, .quick-actions {
        display: none !important;
    }
    body {
        background: white !important;
        color: black !important;
    }
    .exam-header {
        background: none !important;
        color: black !important;
        border-bottom: 2px solid #333;
    }
    .results-container, .option label, .question-text,
    .review-item, .score-card {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
        border: 1px solid #ccc;
    }
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* ===== PROGRESS MODAL ===== */
.progress-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    padding: 20px;
}
.progress-modal-content {
    background: var(--bg, #fff);
    color: var(--text, #333);
    border-radius: var(--radius-lg, 12px);
    padding: 32px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.progress-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: inherit;
    opacity: 0.6;
}
.progress-modal-close:hover { opacity: 1; }
.progress-modal-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 20px;
}