/* ===========================
   Design System: Modern Dark Cinema
   Glassmorphism + Indigo accent
   =========================== */
:root {
  --bg-deep: #020203;
  --bg-base: #050506;
  --bg-elevated: #0a0a0c;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --surface-2: rgba(255, 255, 255, 0.08);
  --surface-3: rgba(255, 255, 255, 0.12);
  --text: #EDEDEF;
  --text-muted: #8A8F98;
  --primary: #5E6AD2;
  --primary-hover: #7B83E0;
  --primary-glow: rgba(94, 106, 210, 0.2);
  --primary-glow-strong: rgba(94, 106, 210, 0.4);
  --accent: #F97316;
  --success: #34D399;
  --success-dim: rgba(52, 211, 153, 0.12);
  --warning: #FBBF24;
  --warning-dim: rgba(251, 191, 36, 0.12);
  --danger: #F87171;
  --danger-dim: rgba(248, 113, 113, 0.12);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 250ms var(--ease-out);
  --transition-slow: 400ms var(--ease-out);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --- Ambient blobs --- */
body::before,
body::after {
  content: "";
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(80px);
}
body::before {
  width: 500px; height: 500px;
  top: -120px; right: -100px;
  background: radial-gradient(circle, rgba(94, 106, 210, 0.08) 0%, transparent 70%);
  animation: blobDrift 20s ease-in-out infinite;
}
body::after {
  width: 400px; height: 400px;
  bottom: -80px; left: -80px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
  animation: blobDrift 25s ease-in-out infinite reverse;
}

@keyframes blobDrift {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(30px, -20px); }
  66% { transform: translate(-20px, 30px); }
}

.hidden { display: none !important; }

/* --- Glass card mixin --- */
.glass {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* --- Resume Banner --- */
.resume-banner {
  background: linear-gradient(135deg, var(--primary), #7C3AED);
  color: white;
  text-align: center;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  font-weight: 500;
  position: relative;
  z-index: 10;
}
.resume-banner button {
  font-size: 13px;
  border-radius: var(--radius-xs);
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.15);
  color: white;
  cursor: pointer;
  font-family: var(--font);
  font-weight: 600;
  transition: background var(--transition-fast);
}
.resume-banner button:hover { background: rgba(255,255,255,0.25); }

/* --- Container --- */
.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 28px 24px;
  position: relative;
  z-index: 1;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font);
  position: relative;
  outline: none;
}
.btn:focus-visible {
  box-shadow: 0 0 0 2px var(--bg-base), 0 0 0 4px var(--primary);
}
.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 0 20px var(--primary-glow), 0 1px 3px rgba(0,0,0,0.3);
}
.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 0 30px var(--primary-glow-strong), 0 4px 12px rgba(0,0,0,0.4);
}
.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}
.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
}
.btn-ghost:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: var(--radius-xs);
}

/* --- Education View --- */
.hero {
  text-align: center;
  padding: 56px 0 40px;
  animation: fadeUp 0.6s var(--ease-out);
}
.hero h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #FFFFFF 0%, #FFFFFF 40%, var(--primary-hover) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Formula */
.formula-box {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin: 36px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.formula-box::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
}
.formula-box h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: 20px;
  font-weight: 600;
}
.formula {
  font-size: 17px;
  line-height: 2.2;
  font-weight: 600;
  letter-spacing: -0.2px;
}
.formula .highlight {
  color: var(--primary-hover);
  position: relative;
}
.formula .op {
  color: var(--text-muted);
  font-weight: 400;
}

/* Variable cards */
.variables-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 36px 0;
}
.variable-card {
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.variable-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-hover), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.variable-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.variable-card:hover::before { opacity: 1; }

.variable-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.variable-card-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  flex-shrink: 0;
}
.variable-card-icon svg {
  width: 22px;
  height: 22px;
  stroke-width: 1.8;
}
.variable-card h3 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.2px;
}
.variable-card p {
  color: var(--text-muted);
  font-size: 13.5px;
  margin-bottom: 14px;
  line-height: 1.6;
}
.variable-card .example {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 10px 14px;
  font-size: 12.5px;
  white-space: pre-line;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Comparison */
.comparison {
  margin: 36px 0;
}
.comparison h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
  letter-spacing: -0.3px;
}
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.comparison-card {
  border-radius: var(--radius);
  padding: 22px;
  position: relative;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.comparison-card.weak {
  background: var(--danger-dim);
  border: 1px solid rgba(248, 113, 113, 0.15);
}
.comparison-card.strong {
  background: var(--success-dim);
  border: 1px solid rgba(52, 211, 153, 0.15);
}
.comparison-card h3 {
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.comparison-card h3 svg { width: 16px; height: 16px; }
.comparison-card.weak h3 { color: var(--danger); }
.comparison-card.strong h3 { color: var(--success); }
.comparison-card .offer-text {
  font-size: 13.5px;
  line-height: 1.7;
  margin-bottom: 14px;
  color: var(--text);
}
.comparison-card ul {
  list-style: none;
  font-size: 12.5px;
}
.comparison-card li {
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}
.comparison-card li svg { width: 14px; height: 14px; flex-shrink: 0; }

/* CTA */
.cta-section {
  text-align: center;
  padding: 48px 0;
}
.cta-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}
.cta-section p {
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: 15px;
}
.btn-cta {
  padding: 16px 44px;
  font-size: 16px;
  border-radius: var(--radius);
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 700;
  font-family: var(--font);
  letter-spacing: -0.2px;
  transition: all var(--transition-base);
  box-shadow: 0 0 24px var(--primary-glow), 0 2px 8px rgba(0,0,0,0.3);
  position: relative;
  outline: none;
}
.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px var(--primary-glow-strong), 0 8px 24px rgba(0,0,0,0.4);
  background: var(--primary-hover);
}
.btn-cta:focus-visible {
  box-shadow: 0 0 0 2px var(--bg-base), 0 0 0 4px var(--primary);
}
.btn-cta:active {
  transform: translateY(0);
}

/* --- Questionnaire View --- */
#view-questionnaire {
  animation: fadeUp 0.4s var(--ease-out);
}
.q-header {
  margin-bottom: 36px;
}
.q-block-number {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary);
  font-weight: 600;
}
.q-block-title h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 6px 0;
  letter-spacing: -0.5px;
}
.q-block-desc {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 18px;
}
.q-progress {
  height: 4px;
  background: var(--surface-2);
  border-radius: 2px;
  overflow: hidden;
}
.q-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
  border-radius: 2px;
  transition: width 0.4s var(--ease-out);
  box-shadow: 0 0 8px var(--primary-glow);
}
.q-progress-text {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  display: block;
  font-weight: 500;
}

.q-label {
  display: block;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.2px;
}
.q-input {
  width: 100%;
  padding: 16px 18px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 15px;
  font-family: var(--font);
  resize: vertical;
  min-height: 110px;
  transition: all var(--transition-fast);
  outline: none;
  line-height: 1.6;
}
.q-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}
.q-input::placeholder {
  color: #555A65;
}
.q-required {
  display: block;
  font-size: 12px;
  color: var(--danger);
  margin-top: 8px;
  font-weight: 500;
}
.q-optional {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 500;
}

.q-validation {
  background: var(--warning-dim);
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-top: 14px;
  font-size: 14px;
  animation: fadeUp 0.3s var(--ease-out);
}
.q-validation p { margin-bottom: 10px; color: var(--text); }
.q-validation-actions {
  display: flex;
  gap: 8px;
}

.q-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 28px;
  gap: 12px;
}

/* --- Diagnosis View --- */
#view-diagnosis {
  animation: fadeUp 0.5s var(--ease-out);
}
#view-diagnosis .container {
  max-width: 740px;
}
.diag-section {
  margin-bottom: 36px;
}
.diag-section h2 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.diag-section h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

/* Summary card */
.diag-summary-card {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  gap: 28px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.diag-summary-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
}
.diag-overall {
  text-align: center;
  flex-shrink: 0;
}
.diag-score-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  font-weight: 800;
  margin: 0 auto 6px;
  background: conic-gradient(
    var(--primary) calc(var(--pct, 0) * 1%),
    var(--surface-2) calc(var(--pct, 0) * 1%)
  );
  position: relative;
  letter-spacing: -1px;
}
.diag-score-circle::before {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--bg-elevated);
}
.diag-score-circle span {
  position: relative;
  z-index: 1;
  color: var(--primary-hover);
}
.diag-overall .label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}
.diag-summary-text p {
  font-size: 14px;
  margin-bottom: 8px;
  color: var(--text-muted);
  line-height: 1.5;
}
.diag-summary-text strong {
  color: var(--text);
}

/* Score bars */
.diag-scores-grid {
  display: grid;
  gap: 10px;
}
.diag-score-card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: border-color var(--transition-fast);
}
.diag-score-card:hover {
  border-color: var(--border-hover);
}
.diag-score-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.diag-score-icon svg { width: 18px; height: 18px; }
.diag-score-bar-container { flex: 1; }
.diag-score-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.1px;
}
.diag-score-bar {
  height: 6px;
  background: var(--surface-2);
  border-radius: 3px;
  overflow: hidden;
}
.diag-score-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.8s var(--ease-out);
}
.diag-score-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 38px;
  text-align: right;
  letter-spacing: -0.5px;
}

/* Weak points */
.diag-weak-points {
  display: grid;
  gap: 10px;
}
.diag-weak-point {
  background: var(--danger-dim);
  border: 1px solid rgba(248, 113, 113, 0.15);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.diag-weak-point-header {
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--danger);
}
.diag-weak-point-header svg { width: 16px; height: 16px; }
.diag-weak-point p {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 4px;
  line-height: 1.5;
}
.diag-tip {
  color: var(--warning) !important;
}

/* Recommendations */
.diag-recommendations {
  display: grid;
  gap: 10px;
}
.diag-recommendation {
  background: var(--success-dim);
  border: 1px solid rgba(52, 211, 153, 0.15);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.diag-recommendation strong {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 13.5px;
  color: var(--success);
}
.diag-recommendation strong svg { width: 16px; height: 16px; }
.diag-recommendation p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Offers */
.diag-offer {
  border-radius: var(--radius);
  padding: 22px 24px;
  font-size: 15px;
  line-height: 1.8;
  white-space: pre-line;
  position: relative;
}
.diag-offer.original {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.diag-offer.improved {
  background: rgba(94, 106, 210, 0.08);
  border: 1px solid rgba(94, 106, 210, 0.2);
  color: var(--text);
  font-weight: 500;
}
.diag-offer.irresistible {
  background: linear-gradient(135deg, rgba(94, 106, 210, 0.12), rgba(124, 58, 237, 0.12));
  border: 1px solid rgba(94, 106, 210, 0.3);
  font-weight: 600;
  font-size: 16px;
  position: relative;
  overflow: hidden;
}
.diag-offer.irresistible::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-glow-strong), transparent);
}

/* Actions */
.diag-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 20px 0;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-hover);
  color: var(--text);
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  transition: all 0.3s var(--ease-out);
  z-index: 1000;
  pointer-events: none;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .variables-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .container { padding: 18px 16px; }
  .hero { padding: 40px 0 28px; }
  .hero h1 { font-size: 24px; }
  .formula { font-size: 14px; }
  .comparison-grid { grid-template-columns: 1fr; }
  .diag-summary-card { flex-direction: column; text-align: center; }
  .diag-actions { flex-direction: column; }
  .diag-actions .btn { width: 100%; justify-content: center; }
  .q-nav { flex-direction: column-reverse; }
  .q-nav .btn { width: 100%; justify-content: center; }
  .btn-cta { width: 100%; }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- Print --- */
@media print {
  body {
    background: white;
    color: #111;
  }
  body::before, body::after { display: none; }
  .hidden { display: none !important; }
  .diag-actions { display: none; }
  .resume-banner { display: none; }
  .glass, .variable-card, .diag-summary-card, .diag-score-card,
  .diag-weak-point, .diag-recommendation, .diag-offer {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: 1px solid #ddd;
    background: #f9f9f9;
  }
  .formula-box, .comparison-card {
    backdrop-filter: none;
    border: 1px solid #ddd;
  }
}