:root {
  --dp-bg: #faf7f0;
  --dp-surface: #ffffff;
  --dp-surface-alt: #f5f0e8;
  --dp-border: #e0d5c0;
  --dp-text: #111111;
  --dp-text-dim: #6b6580;
  --dp-gold: #8b6914;
  --dp-gold-light: #b8860b;
  --dp-gold-bg: rgba(139, 105, 20, 0.08);
  --dp-red: #b91c1c;
  --dp-red-light: #dc2626;
  --dp-green: #15803d;
  --dp-blue: #1d4ed8;
  --dp-purple: #7c3aed;
  --dp-font: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --dp-font-display: "PingFang SC", "Microsoft YaHei", serif;
  --dp-radius: 1rem;
  --dp-seal-color: var(--dp-gold);
}

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

body {
  font-family: var(--dp-font);
  background: var(--dp-bg);
  color: var(--dp-text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 1000;
  padding: 0.75rem 1.5rem;
  background: var(--dp-gold);
  color: var(--dp-bg);
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 0.5rem 0;
}
.skip-link:focus {
  top: 0;
}

.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;
}

#app {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phase {
  display: none;
  width: 100%;
  max-width: 30rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  min-height: 100vh;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.phase.active { display: flex; }

:focus-visible {
  outline: 0.1875rem solid var(--dp-gold);
  outline-offset: 0.125rem;
}
:focus:not(:focus-visible) {
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--dp-gold), var(--dp-gold-light));
  color: #ffffff;
  border: none;
  padding: 1rem 3rem;
  border-radius: 999px;
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  font-family: var(--dp-font);
  min-height: 2.75rem;
}

.btn-primary:hover { transform: scale(1.05); box-shadow: 0 0 1.875rem rgba(184, 134, 11, 0.3); }

.btn-secondary {
  background: transparent;
  color: var(--dp-gold);
  border: 1px solid var(--dp-gold);
  padding: 0.75rem 2rem;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--dp-font);
  text-decoration: none;
  display: inline-block;
  min-height: 2.75rem;
}

.btn-secondary:hover { background: var(--dp-gold-bg); }

.hook-bg {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 50% 30%, rgba(184, 134, 11, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hook-content { text-align: center; }

.hook-line {
  font-family: var(--dp-font-display);
  font-size: 1.75rem;
  font-weight: 900;
  line-height: 1.6;
  letter-spacing: 0.04em;
  opacity: 0;
  animation: fadeInUp 0.6s ease-out forwards;
}

.hook-line-1 { animation-delay: 0.2s; }
.hook-line-2 { animation-delay: 0.8s; }
.hook-line-3 { animation-delay: 1.4s; font-size: 1.25rem; color: var(--dp-text-dim); }

.highlight { color: var(--dp-gold); font-weight: 900; }

#btn-start {
  margin-top: 2.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.8s forwards;
}

.hook-counter {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--dp-text-dim);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 1.2s forwards;
}

.hook-privacy {
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--dp-text-dim);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 1.4s forwards;
}

.hook-privacy a {
  color: var(--dp-gold);
  text-decoration: underline;
}

.hook-disclaimer {
  font-size: 0.6875rem;
  color: var(--dp-text-dim);
  opacity: 0.7;
  margin-top: 0.25rem;
}

.privacy-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.8125rem;
  color: var(--dp-text-dim);
  cursor: pointer;
}

.privacy-check input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--dp-gold);
  cursor: pointer;
  flex-shrink: 0;
}

.privacy-check a {
  color: var(--dp-gold);
  text-decoration: underline;
}

.card-privacy {
  font-size: 0.75rem;
  margin-top: 0.5rem;
}

.card-privacy a {
  color: var(--dp-text-dim);
  opacity: 0.6;
  transition: opacity 0.2s;
}

.card-privacy a:hover {
  opacity: 1;
  color: var(--dp-gold);
}

.card-disclaimer {
  font-size: 0.6875rem;
  color: var(--dp-text-dim);
  opacity: 0.7;
  margin-bottom: 0.25rem;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(1.25rem); }
  to { opacity: 1; transform: translateY(0); }
}

.principal-content { text-align: center; }

.principal-label {
  font-size: 1.25rem;
  color: var(--dp-text-dim);
  margin-bottom: 1rem;
}

.principal-amount {
  font-family: var(--dp-font-display);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--dp-gold);
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.principal-hint {
  font-size: 1rem;
  color: var(--dp-text-dim);
  margin-bottom: 2.5rem;
}

#btn-begin { margin-top: 1rem; }

.quiz-container { width: 100%; }

.quiz-progress { margin-bottom: 1.5rem; }

.progress-bar {
  width: 100%;
  height: 0.25rem;
  background: var(--dp-surface-alt);
  border-radius: 0.125rem;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--dp-gold), var(--dp-gold-light));
  border-radius: 0.125rem;
  transition: width 0.5s ease-out;
  width: 0%;
}

.progress-text {
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  color: var(--dp-text-dim);
  text-align: right;
}

.quiz-card {
  background: var(--dp-surface);
  border: 1px solid var(--dp-border);
  border-radius: var(--dp-radius);
  padding: 1.75rem 1.5rem;
}

.q-scene {
  font-size: 0.8125rem;
  color: var(--dp-gold);
  font-weight: 700;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.q-text {
  font-size: 1.0625rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  white-space: pre-line;
  color: var(--dp-text);
  font-weight: 500;
}

.q-options { display: flex; flex-direction: column; gap: 0.75rem; }

.q-option {
  background: var(--dp-surface-alt);
  border: 1px solid var(--dp-border);
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--dp-text);
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--dp-font);
  text-align: left;
  white-space: pre-line;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  min-height: 2.75rem;
}

.q-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.5rem;
  background: rgba(184, 134, 11, 0.08);
  color: var(--dp-gold);
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.q-text-inner {
  flex: 1;
}

.q-option:hover {
  border-color: var(--dp-gold);
  background: var(--dp-gold-bg);
}

.q-option.selected {
  border-color: var(--dp-gold);
  background: rgba(184, 134, 11, 0.12);
}

.insight-card {
  background: var(--dp-surface);
  border: 1px solid var(--dp-border);
  border-radius: var(--dp-radius);
  padding: 2rem 1.5rem;
  text-align: center;
}

.insight-text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--dp-gold-light);
  margin-bottom: 2rem;
}

.reveal-container { width: 100%; text-align: center; }

.reveal-suspense { padding: 3.75rem 0; }

.reveal-loading {
  font-size: 1.125rem;
  color: var(--dp-text-dim);
  margin-bottom: 2rem;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.reveal-dims {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.dim-flash {
  padding: 0.375rem 0.875rem;
  background: var(--dp-surface-alt);
  border: 1px solid var(--dp-border);
  border-radius: 0.5rem;
  font-size: 0.8125rem;
  color: var(--dp-text-dim);
  animation: dimFlash 0.8s ease-out forwards;
}

@keyframes dimFlash {
  0% { opacity: 0; transform: scale(0.8); }
  50% { opacity: 1; border-color: var(--dp-gold); color: var(--dp-gold); }
  100% { opacity: 0.3; }
}

.reveal-card { animation: fadeInUp 0.6s ease-out; }
.reveal-card.hidden { display: none; }

.card-flip {
  perspective: 50rem;
  margin-bottom: 2rem;
}

.card-front {
  background: linear-gradient(145deg, var(--dp-surface), var(--dp-surface-alt));
  border: 2px solid var(--dp-gold);
  border-radius: 1.25rem;
  padding: 2.5rem 1.5rem;
  animation: cardFlipIn 0.8s ease-out;
}

@keyframes cardFlipIn {
  0% { transform: rotateY(90deg); opacity: 0; }
  100% { transform: rotateY(0); opacity: 1; }
}

.persona-emoji {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 6rem;
  height: 6rem;
  border: 3px solid var(--dp-seal-color);
  border-radius: 0.5rem;
  background: color-mix(in srgb, var(--dp-seal-color) 12%, transparent);
  color: var(--dp-seal-color);
  transform: rotate(-8deg);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--dp-seal-color) 30%, transparent), inset 0 0 0 2px color-mix(in srgb, var(--dp-seal-color) 10%, transparent);
}
.persona-name {
  font-family: var(--dp-font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--dp-gold);
  margin-bottom: 0.75rem;
  letter-spacing: 0.06em;
}
.persona-quote { font-size: 1rem; color: var(--dp-text-dim); font-style: italic; }

.card-details { margin-bottom: 2rem; }

.detail-row {
  padding: 1rem 1.25rem;
  background: var(--dp-surface);
  border-radius: 0.75rem;
  margin-bottom: 0.5rem;
  text-align: left;
}

.detail-label { font-size: 0.8125rem; color: var(--dp-text-dim); margin-bottom: 0.25rem; }
.detail-value { font-size: 1rem; font-weight: 600; }
.detail-value.power { color: var(--dp-green); }
.detail-value.cost { color: var(--dp-red); }

.money-lost { border: 1px solid rgba(192, 57, 43, 0.25); }
.detail-value.money {
  font-family: var(--dp-font-display);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--dp-red);
  font-variant-numeric: tabular-nums;
}

.detail-value.money-gain {
  font-family: var(--dp-font-display);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--dp-green);
  font-variant-numeric: tabular-nums;
}

.money-compare {
  font-size: 0.8125rem;
  color: var(--dp-text-dim);
  margin-top: 0.375rem;
  line-height: 1.5;
}

.money-scale {
  font-size: 0.75rem;
  color: var(--dp-gold);
  margin-top: 0.25rem;
  opacity: 0.8;
}

.cp-row { border: 1px solid rgba(108, 63, 160, 0.25); }
.detail-value.cp { color: var(--dp-purple); }

.radar-section {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--dp-surface);
  border-radius: var(--dp-radius);
}

.radar-title { font-size: 0.875rem; color: var(--dp-text-dim); margin-bottom: 1rem; }
.radar-chart { width: 100%; height: 17.5rem; }
.radar-hint { font-size: 0.8125rem; color: var(--dp-gold); margin-top: 0.75rem; }

.card-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.card-watermark {
  font-size: 0.75rem;
  color: var(--dp-text-dim);
  opacity: 0.5;
}

.card-revisit {
  margin-bottom: 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--dp-surface);
  border: 1px dashed var(--dp-border);
  border-radius: 0.75rem;
  text-align: center;
}

.revisit-hint {
  font-size: 0.875rem;
  color: var(--dp-text-dim);
  margin-bottom: 0.75rem;
}

.btn-retest {
  background: transparent;
  color: var(--dp-gold);
  border: 1px solid var(--dp-border);
  padding: 0.625rem 1.5rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--dp-font);
  min-height: 2.75rem;
}

.btn-retest:hover {
  border-color: var(--dp-gold);
  background: var(--dp-gold-bg);
}

.save-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(10, 10, 26, 0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.25rem;
}

.save-overlay.hidden { display: none; }

.save-card {
  width: 22.5rem;
  max-width: 100%;
  background: linear-gradient(145deg, #ffffff, #f5f0e8);
  border: 2px solid var(--dp-gold);
  border-radius: 1.25rem;
  overflow: hidden;
}

.save-card-header {
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, rgba(184, 134, 11, 0.1), transparent);
  border-bottom: 1px solid var(--dp-border);
}

.save-brand { font-size: 0.875rem; font-weight: 700; color: var(--dp-gold); letter-spacing: 0.125rem; }

.save-card-body { padding: 2rem 1.5rem; text-align: center; }

.save-emoji {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 5rem;
  height: 5rem;
  border: 3px solid var(--dp-seal-color);
  border-radius: 0.5rem;
  background: color-mix(in srgb, var(--dp-seal-color) 12%, transparent);
  color: var(--dp-seal-color);
  transform: rotate(-8deg);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--dp-seal-color) 30%, transparent), inset 0 0 0 2px color-mix(in srgb, var(--dp-seal-color) 10%, transparent);
}
.save-name {
  font-family: var(--dp-font-display);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--dp-gold);
  margin-bottom: 0.5rem;
  letter-spacing: 0.04em;
}
.save-quote { font-size: 0.875rem; color: var(--dp-text-dim); font-style: italic; margin-bottom: 1rem; }

.save-rarity {
  font-size: 0.8125rem;
  color: var(--dp-gold);
  font-weight: 700;
  margin-bottom: 1rem;
  padding: 0.375rem 0.75rem;
  background: rgba(184, 134, 11, 0.08);
  border-radius: 999px;
  display: inline-block;
}

.save-money {
  font-family: var(--dp-font-display);
  font-size: 1.375rem;
  font-weight: 900;
  color: var(--dp-red);
  margin-bottom: 0.75rem;
}

.save-cp { font-size: 0.875rem; color: var(--dp-purple); }

.save-card-footer {
  padding: 0.75rem 1.5rem;
  border-top: 1px solid var(--dp-border);
  text-align: center;
}

.save-card-footer p { font-size: 0.75rem; color: var(--dp-text-dim); }

.save-card-no {
  font-size: 0.6875rem;
  color: var(--dp-text-dim);
  letter-spacing: 0.05em;
  margin-bottom: 0.375rem;
}

.save-qrcode-hint {
  font-size: 0.6875rem;
  color: var(--dp-text-dim);
}

.save-preview {
  display: block;
  max-width: 100%;
  border-radius: 0.5rem;
  margin: 0 auto 0.75rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
}

.save-preview.hidden { display: none; }

#btn-download.hidden { display: none; }

.save-qrcode {
  display: flex;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.save-qrcode canvas {
  border-radius: 0.375rem;
}

.save-actions { margin-top: 1.5rem; text-align: center; }
.save-tip { font-size: 0.875rem; color: var(--dp-text-dim); margin-bottom: 1rem; }

.deep-container {
  width: 100%;
  max-width: 36rem;
}

.deep-hook {
  font-size: 1.375rem;
  font-weight: 800;
  line-height: 1.5;
  color: var(--dp-red);
  margin-bottom: 2rem;
  padding: 1.25rem;
  background: rgba(192, 57, 43, 0.06);
  border-left: 3px solid var(--dp-red);
  border-radius: 0 0.75rem 0.75rem 0;
}

.deep-block {
  background: var(--dp-surface);
  border: 1px solid var(--dp-border);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-bottom: 0.75rem;
}

.deep-block-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.0625rem;
  margin-bottom: 0.5rem;
  color: var(--dp-text-dim);
}

.deep-block-text {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--dp-text);
}

.btn-expand {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.25rem 0.75rem;
  background: transparent;
  color: var(--dp-gold);
  border: 1px solid var(--dp-border);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--dp-font);
  transition: all 0.2s;
}

.btn-expand:hover {
  border-color: var(--dp-gold);
  background: var(--dp-gold-bg);
}

.btn-expand.hidden { display: none; }

.data-block {
  border-color: rgba(184, 134, 11, 0.25);
}
.data-block .deep-block-label {
  color: var(--dp-gold);
}

.trap-block {
  border-color: rgba(192, 57, 43, 0.25);
}
.trap-block .deep-block-label {
  color: var(--dp-red);
}

.method-block {
  border-color: rgba(26, 138, 74, 0.25);
  background: linear-gradient(135deg, var(--dp-surface), rgba(26, 138, 74, 0.04));
}
.method-block .deep-block-label {
  color: var(--dp-green);
}

.deep-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.deep-locked {
  background: var(--dp-surface);
  border: 1px dashed var(--dp-border);
  border-radius: var(--dp-radius);
  padding: 2.5rem 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.deep-lock-visual {
  margin-bottom: 1.5rem;
}

.lock-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.6;
}

.lock-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dp-text);
  margin-bottom: 0.5rem;
}

.lock-desc {
  font-size: 0.8125rem;
  color: var(--dp-text-dim);
  line-height: 1.6;
}

.btn-unlock {
  display: block;
  width: 100%;
  max-width: 18rem;
  margin: 0 auto 1rem;
}

.lock-hint {
  font-size: 0.75rem;
  color: var(--dp-text-dim);
}

.deep-unlocked.hidden { display: none; }

.deep-loading {
  text-align: center;
  padding: 3rem 1.5rem;
}
.loading-text {
  font-size: 1rem;
  color: var(--dp-text-dim);
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.deep-content.hidden { display: none; }

.deep-section {
  margin-bottom: 2.5rem;
}
.deep-section-title {
  font-family: var(--dp-font-display);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--dp-gold);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--dp-border);
  letter-spacing: 0.04em;
}

.persona-section .deep-block { margin-bottom: 1rem; }

.pattern-section {
  background: rgba(192, 57, 43, 0.04);
  border: 1px solid rgba(192, 57, 43, 0.15);
  border-radius: var(--dp-radius);
  padding: 1.5rem;
}
.pattern-section .deep-section-title {
  color: var(--dp-red);
  border-bottom-color: rgba(192, 57, 43, 0.25);
}
.pattern-card {
  background: var(--dp-surface);
  border: 1px solid var(--dp-border);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.pattern-card.severity-5 { border-left: 4px solid var(--dp-red); }
.pattern-card.severity-4 { border-left: 4px solid #f97316; }
.pattern-card.severity-3 { border-left: 4px solid var(--dp-gold); }
.pattern-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--dp-red-light);
  margin-bottom: 1rem;
}

.perq-section .deep-section-title {
  color: var(--dp-purple);
  border-bottom-color: rgba(108, 63, 160, 0.25);
}
.perq-card {
  background: var(--dp-surface);
  border: 1px solid var(--dp-border);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.perq-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}
.perq-scene {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--dp-gold);
  background: rgba(184, 134, 11, 0.08);
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
}
.perq-choice {
  font-size: 0.8125rem;
  color: var(--dp-text-dim);
}
.perq-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--dp-text);
  margin-bottom: 1rem;
  line-height: 1.5;
}
.perq-fallback {
  text-align: center;
  color: var(--dp-text-dim);
  padding: 2rem;
  font-size: 0.9375rem;
}

.ad-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(10, 10, 26, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 1.25rem;
}

.ad-overlay.hidden { display: none; }

.ad-container {
  width: 100%;
  max-width: 20rem;
  background: var(--dp-surface);
  border: 1px solid var(--dp-border);
  border-radius: var(--dp-radius);
  overflow: hidden;
}

.ad-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--dp-border);
}

.ad-title {
  font-size: 0.75rem;
  color: var(--dp-text-dim);
  font-weight: 600;
}

.ad-countdown {
  font-size: 0.875rem;
  color: var(--dp-gold);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.ad-slot {
  height: 15rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--dp-surface-alt);
}

.ad-placeholder {
  font-size: 1.125rem;
  color: var(--dp-text-dim);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.ad-placeholder-hint {
  font-size: 0.75rem;
  color: var(--dp-text-dim);
  opacity: 0.6;
  padding: 0 1rem;
  text-align: center;
}

.ad-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--dp-border);
  text-align: right;
}

.btn-ad-close {
  background: transparent;
  color: var(--dp-text-dim);
  border: 1px solid var(--dp-border);
  padding: 0.375rem 1rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  cursor: pointer;
  font-family: var(--dp-font);
  transition: all 0.2s;
  min-height: 2.75rem;
}

.btn-ad-close:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-ad-close:not(:disabled):hover {
  color: var(--dp-text);
  border-color: var(--dp-text-dim);
}

.save-challenge {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--dp-gold);
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--dp-border);
}

.save-teaser {
  font-size: 0.8125rem;
  color: var(--dp-text-dim);
  margin-top: 0.5rem;
}

@media (max-width: 30rem) {
  .principal-amount { font-size: 2.625rem; }
  .hook-line { font-size: 1.5rem; }
  .save-card { width: 100%; }
  .persona-emoji { width: 5rem; height: 5rem; font-size: 2.5rem; }
}

@media (min-width: 48rem) {
  .phase { padding: 2rem; }
  .hook-line { font-size: 2rem; }
  .principal-amount { font-size: 4rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .hook-line, #btn-start, .hook-counter {
    opacity: 1;
  }
  .reveal-card {
    animation: none;
  }
  .card-front {
    animation: none;
  }
}

@media (prefers-contrast: more) {
  :root {
    --dp-text-dim: #4a4560;
    --dp-border: #c8b898;
  }
  .btn-primary,
  .btn-secondary,
  .btn-retest,
  .q-option {
    border-width: 2px;
  }
}