:root {
  --bg-page: #fafafb;
  --bg-surface: #ffffff;
  --bg-subtle: #f4f4f6;
  --k-pink: #ff2e7e;
  --k-pink-dark: #e01b66;
  --k-pink-soft: #fff0f6;
  --k-pink-border: #ffd6e7;
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #8e8e99;
  --border-light: #ececf0;
  --status-pass: #0d9488;
  --status-pass-bg: #f0fdfa;
  --status-warn: #d97706;
  --status-warn-bg: #fffbeb;
  --status-alert: #e11d48;
  --status-alert-bg: #fff1f2;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Inter", "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.55;
  padding-bottom: 84px;
  -webkit-font-smoothing: antialiased;
}

.app-shell {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  background-color: var(--bg-page);
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
}

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-mark {
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.6px;
  color: var(--k-pink);
}

.brand-sub {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: -0.1px;
}

.sync-status {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Layout */
.main-content {
  padding: 20px;
  flex: 1;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 18px;
  padding: 24px 20px;
  margin-bottom: 16px;
  box-shadow: 0 2px 14px rgba(24, 24, 27, 0.03);
}

.section-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--k-pink);
  margin-bottom: 6px;
}

.hero-title {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.hero-sub {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

/* Scanner Viewport */
.scanner-viewport {
  width: 100%;
  min-height: 188px;
  background: var(--bg-Pink-soft, #fff8fb);
  border: 1.5px dashed var(--k-pink-border);
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 22px 18px;
  margin-bottom: 16px;
  text-align: center;
  overflow: hidden;
}

.viewport-hint {
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  max-width: 280px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 13px 18px;
  border-radius: 12px;
  font-size: 0.92rem;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  letter-spacing: -0.1px;
}

.btn:active {
  transform: scale(0.99);
}

.btn-primary {
  background: var(--k-pink);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--k-pink-dark);
}

.btn-secondary {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: #e9e9ee;
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  margin-top: 10px;
  font-weight: 600;
  font-size: 0.85rem;
}

.btn-outline:hover {
  border-color: var(--k-pink-border);
  color: var(--k-pink);
  background: var(--k-pink-soft);
}

/* Input Row */
.input-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.barcode-input {
  flex: 1;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  background: var(--bg-page);
  color: var(--text-primary);
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease;
}

.barcode-input:focus {
  border-color: var(--k-pink);
  background: #ffffff;
}

.btn-inline {
  width: auto;
  padding: 12px 20px;
}

/* Sample Barcode Links */
.sample-bar {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.sample-label {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.quick-demo-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.demo-chip {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-page);
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  padding: 6px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.demo-chip:hover {
  background: var(--k-pink-soft);
  color: var(--k-pink);
  border-color: var(--k-pink-border);
}

/* Verdict Stamp Box (Badge used ONLY here) */
.stamp-box {
  border-radius: 16px;
  padding: 20px;
  margin-top: 18px;
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
}

.stamp-red {
  background: var(--status-alert-bg);
  border-color: #fecdd3;
}

.stamp-green {
  background: var(--status-pass-bg);
  border-color: #99f6e4;
}

.stamp-blue {
  background: var(--k-pink-soft);
  border-color: var(--k-pink-border);
}

.stamp-amber {
  background: var(--status-warn-bg);
  border-color: #fde68a;
}

.stamp-badge {
  display: inline-block;
  font-weight: 800;
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 10px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

.stamp-red .stamp-badge {
  background: var(--status-alert);
  color: #ffffff;
}

.stamp-green .stamp-badge {
  background: var(--status-pass);
  color: #ffffff;
}

.stamp-blue .stamp-badge {
  background: var(--k-pink);
  color: #ffffff;
}

.stamp-amber .stamp-badge {
  background: var(--status-warn);
  color: #ffffff;
}

/* Questions & Options */
.question-block {
  margin-top: 14px;
  padding: 16px;
  background: #ffffff;
  border-radius: 12px;
  border: 1px solid var(--border-light);
}

.question-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.option-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 11px 14px;
  margin-bottom: 6px;
  border-radius: 10px;
  border: 1px solid var(--border-light);
  background: var(--bg-page);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.12s ease;
}

.option-btn:hover {
  border-color: var(--k-pink-border);
}

.option-btn.selected {
  border-color: var(--k-pink);
  background: var(--k-pink-soft);
  color: var(--k-pink-dark);
  font-weight: 700;
}

.meta-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.ad-slot {
  margin-top: 16px;
  padding: 12px;
  border-radius: 10px;
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.2px;
}

/* Guide List */
.guide-item {
  display: block;
  padding: 16px;
  border-radius: 14px;
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  margin-bottom: 10px;
  text-decoration: none;
  color: var(--text-primary);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.guide-item:hover {
  border-color: var(--k-pink);
  background: #ffffff;
}

.guide-meta {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--k-pink);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-around;
  max-width: 480px;
  margin: 0 auto;
  padding: 8px 12px;
  z-index: 60;
  backdrop-filter: blur(12px);
}

.nav-tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 8px 4px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  transition: color 0.15s ease, background 0.15s ease;
}

/* GEO Direct Answer Box & Semantic Comparison Table */
.geo-answer-box {
  background: var(--k-pink-soft);
  border-left: 3px solid var(--k-pink);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 18px;
  font-size: 0.86rem;
  color: var(--text-primary);
}

.spec-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 14px 0 18px 0;
  border: 1px solid var(--border-light);
  border-radius: 12px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  text-align: left;
  background: #ffffff;
}

.spec-table th {
  background: var(--bg-page);
  color: var(--text-primary);
  font-weight: 700;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-light);
}

.spec-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: top;
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.lockin-box {
  margin-top: 18px;
  padding: 16px;
  border-radius: 14px;
  border: 1.5px dashed var(--k-pink-border);
  background: #fff8fb;
}

.nav-tab svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.nav-tab.active {
  color: var(--k-pink);
  background: var(--k-pink-soft);
  font-weight: 700;
}

/* Consent Banner */
.consent-banner {
  position: fixed;
  bottom: 74px;
  left: 16px;
  right: 16px;
  max-width: 448px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid var(--k-pink-border);
  border-radius: 16px;
  padding: 16px;
  z-index: 70;
  box-shadow: 0 12px 32px rgba(24, 24, 27, 0.1);
}

/* PWA Top Install Ribbon Strip */
.pwa-strip {
  background: var(--k-pink-soft);
  border-bottom: 1px solid var(--k-pink-border);
  padding: 10px 16px;
  font-size: 0.8rem;
  color: var(--text-primary);
}

.pwa-strip-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.pwa-strip-text {
  flex: 1;
  line-height: 1.35;
  color: var(--text-primary);
}

.pwa-strip-title {
  font-weight: 800;
  color: var(--k-pink-dark);
  margin-right: 4px;
}

.pwa-strip-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.pwa-btn-install {
  background: var(--k-pink);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
}

.pwa-btn-install:hover {
  background: var(--k-pink-dark);
}

.pwa-btn-close {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--k-pink-border);
  border-radius: 8px;
  padding: 5px 8px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
}

.pwa-ios-guide {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--k-pink-border);
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.hidden {
  display: none !important;
}