:root {
  --bg-primary: #0a0f1d;
  --bg-secondary: #10182b;
  --bg-card: rgba(18, 26, 47, 0.82);
  --bg-card-hover: rgba(26, 37, 65, 0.95);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: #3b82f6;
  
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.35);

  --accent: #38bdf8;
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.3);
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.3);
  --warning: #f59e0b;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --shadow-card: 0 20px 45px -10px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 30px 16px 60px;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background ambient glows */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}
.bg-glow-1 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.18), transparent 70%);
  top: -100px;
  right: -100px;
}
.bg-glow-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.12), transparent 70%);
  bottom: 0;
  left: -150px;
}

.container {
  width: 100%;
  max-width: 680px;
  position: relative;
  z-index: 1;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

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

.brand-badge {
  background: linear-gradient(135deg, #2563eb, #38bdf8);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 1px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-company {
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.8px;
  color: #fff;
}

.brand-sub {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.guide-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Cards */
.card {
  display: none;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-card);
  animation: fadeIn 0.3s ease-out;
}

.card.active {
  display: block;
}

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

/* Hero Section */
.card-hero {
  text-align: center;
  margin-bottom: 28px;
}

.hero-icon {
  font-size: 42px;
  margin-bottom: 12px;
  display: inline-block;
  animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.card-hero h1 {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

.info-badges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.badge-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 10px;
  text-align: center;
}

.badge-num {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 2px;
}

.badge-label {
  font-size: 11px;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group-full {
  grid-column: span 2;
}

label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

.required {
  color: var(--danger);
}

input[type="text"],
input[type="email"] {
  background: rgba(10, 15, 29, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 13px 16px;
  color: #fff;
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}

input[type="text"]:focus,
input[type="email"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: rgba(10, 15, 29, 0.9);
}

.field-hint {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* Checkbox */
.checkbox-container {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  position: relative;
  user-select: none;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.checkmark {
  width: 20px;
  height: 20px;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  flex-shrink: 0;
  position: relative;
  transition: var(--transition);
  margin-top: 2px;
}

.checkbox-container input:checked ~ .checkmark {
  background-color: var(--primary);
  border-color: var(--primary);
}

.checkmark::after {
  content: "";
  position: absolute;
  display: none;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.checkbox-container input:checked ~ .checkmark::after {
  display: block;
}

.consent-text {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 700;
  font-size: 14px;
  padding: 13px 22px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #1d4ed8);
  color: #fff;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(37, 99, 235, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

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

.btn-block {
  width: 100%;
}

/* QUIZ INTERFACE */
.quiz-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.quiz-candidate-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.candidate-avatar {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #38bdf8, #2563eb);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
}

.candidate-name {
  font-weight: 700;
  font-size: 14px;
  color: #fff;
}

.candidate-email {
  font-size: 12px;
  color: var(--text-dim);
}

.quiz-counter {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 700;
}

.counter-curr {
  color: var(--accent);
  font-size: 16px;
}

.counter-total {
  color: var(--text-dim);
  font-size: 13px;
}

.progress-wrap {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 28px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #38bdf8, #2563eb);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.section-pill {
  display: inline-block;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.question-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  line-height: 1.45;
  margin-bottom: 22px;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.option-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

.option-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateX(3px);
}

.option-card.selected {
  background: rgba(37, 99, 235, 0.15);
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary), 0 4px 14px var(--primary-glow);
}

.opt-letter {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
  flex-shrink: 0;
  transition: var(--transition);
}

.option-card.selected .opt-letter {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.opt-text {
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.4;
  font-weight: 500;
}

.quiz-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

/* RESULTS SCREEN */
.result-header {
  border-radius: var(--radius-md);
  padding: 30px;
  text-align: center;
  margin-bottom: 28px;
  position: relative;
  overflow: hidden;
}

.result-header.success-theme {
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.04));
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.result-header.fail-theme {
  background: linear-gradient(180deg, rgba(239, 68, 68, 0.15), rgba(239, 68, 68, 0.04));
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.result-icon-wrap {
  font-size: 48px;
  margin-bottom: 8px;
}

.result-badge-status {
  display: inline-block;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 1.5px;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.success-theme .result-badge-status {
  background: rgba(16, 185, 129, 0.2);
  color: var(--success);
  border: 1px solid var(--success);
}

.fail-theme .result-badge-status {
  background: rgba(239, 68, 68, 0.2);
  color: var(--danger);
  border: 1px solid var(--danger);
}

.result-title {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.result-desc {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 24px;
  line-height: 1.5;
}

.score-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  padding: 20px;
  max-width: 440px;
  margin: 0 auto;
}

.score-circle {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.score-value {
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.score-percent {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  margin-top: 4px;
}

.score-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.meta-row {
  display: flex;
  gap: 8px;
  font-size: 13px;
}

.meta-label {
  color: var(--text-dim);
}

.meta-val {
  font-weight: 700;
  color: #fff;
}

.text-success {
  color: var(--success);
}
.text-danger {
  color: var(--danger);
}

.result-actions {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

/* Question Review */
.review-section {
  border-top: 1px solid var(--border-color);
  padding-top: 28px;
}

.review-section h3 {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.review-intro {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 18px;
}

.review-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.review-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: var(--transition);
}

.review-card.correct {
  border-left: 4px solid var(--success);
}

.review-card.incorrect {
  border-left: 4px solid var(--danger);
}

.review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.review-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  text-transform: uppercase;
}

.review-card.correct .review-badge {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.review-card.incorrect .review-badge {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

.review-q-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  line-height: 1.4;
}

.review-answers {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  margin-bottom: 10px;
}

.ans-row {
  display: flex;
  gap: 6px;
}

.ans-label {
  color: var(--text-dim);
  width: 100px;
  flex-shrink: 0;
}

.ans-val-user {
  font-weight: 600;
}
.ans-val-user.ok { color: var(--success); }
.ans-val-user.bad { color: var(--danger); }

.ans-val-correct {
  font-weight: 600;
  color: var(--success);
}

.review-explanation {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.45;
  border-left: 2px solid var(--accent);
}

/* Footer */
.app-footer {
  text-align: center;
  margin-top: 32px;
  font-size: 12px;
  color: var(--text-dim);
}

/* Responsive adjustments */
@media (max-width: 600px) {
  body {
    padding: 16px 12px 40px;
  }
  .card {
    padding: 24px 18px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-group-full {
    grid-column: span 1;
  }
  .score-display {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }
  .score-meta {
    text-align: center;
  }
}