@import url('https://fonts.googleapis.com/css2?family=Heebo:wght@300;400;500;600;700;800;900&family=Rubik:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #f5f5f8;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafe;
  --bg-accent: #f0f0f6;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8888a4;
  --accent-blue: #4361ee;
  --accent-purple: #7c3aed;
  --accent-teal: #0d9488;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;
  --accent-green: #16a34a;
  --border-color: #dddde8;
  --border-subtle: #e8e8f0;
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Heebo', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(67, 97, 238, 0.06), transparent),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(124, 58, 237, 0.04), transparent),
    radial-gradient(ellipse 60% 40% at 20% 80%, rgba(13, 148, 136, 0.03), transparent);
  pointer-events: none;
  z-index: 0;
}

#app {
  position: relative;
  z-index: 1;
}

/* ===== UPLOAD SCREEN ===== */
.upload-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 20px;
  animation: fadeIn 0.6s ease-out;
}

.upload-logo {
  font-family: 'Rubik', sans-serif;
  font-size: 3.2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.upload-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  margin-bottom: 48px;
  font-weight: 300;
}

.upload-zone {
  width: 100%;
  max-width: 560px;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-xl);
  padding: 64px 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(67, 97, 238, 0.04), transparent 70%);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent-blue);
  background: var(--bg-card);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.upload-zone:hover::before,
.upload-zone.drag-over::before {
  opacity: 1;
}

.upload-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(124, 58, 237, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.upload-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--accent-blue);
  fill: none;
  stroke-width: 1.5;
}

.upload-zone h2 {
  font-family: 'Rubik', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}

.upload-zone p {
  color: var(--text-muted);
  font-size: 0.95rem;
  position: relative;
  z-index: 1;
}

.upload-zone input[type="file"] {
  display: none;
}

.upload-hint {
  margin-top: 32px;
  padding: 16px 24px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  max-width: 560px;
  width: 100%;
  box-shadow: var(--shadow-card);
}

.upload-hint code {
  color: var(--accent-teal);
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  direction: ltr;
  unicode-bidi: embed;
  display: block;
  margin-top: 8px;
  background: var(--bg-accent);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  text-align: left;
}

.upload-hint .hint-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== VIEWER ===== */
.viewer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px 80px;
}

/* Hero Header */
.hero {
  padding: 60px 0 48px;
  text-align: center;
  animation: slideDown 0.7s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(67, 97, 238, 0.08), rgba(124, 58, 237, 0.08));
  border: 1px solid rgba(67, 97, 238, 0.2);
  padding: 6px 18px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent-blue);
  margin-bottom: 20px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
  animation: pulse 2s infinite;
}

.hero h1 {
  font-family: 'Rubik', sans-serif;
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 32px;
  font-weight: 300;
  line-height: 1.8;
}

.hero-meta {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.hero-meta-item .icon {
  width: 18px;
  height: 18px;
  opacity: 0.6;
}

/* Navigation */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 245, 248, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  margin: 0 -32px;
  padding: 0 32px;
  animation: slideDown 0.5s ease-out 0.2s both;
}

.nav-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 10px 0;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.25s ease;
  border: 1px solid transparent;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-link.active {
  color: var(--accent-blue);
  background: rgba(67, 97, 238, 0.08);
  border-color: rgba(67, 97, 238, 0.2);
}

/* Back button */
.back-btn {
  position: fixed;
  bottom: 32px;
  left: 32px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  color: var(--text-secondary);
  font-family: 'Heebo', sans-serif;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-card);
}

.back-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.back-btn svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

/* Sections */
.section {
  padding-top: 32px;
  animation: fadeIn 0.3s ease-out;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.section-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.section-icon svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.5;
  fill: none;
}

.section-header h2 {
  font-family: 'Rubik', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Color variants for section icons */
.section-icon.blue { background: rgba(67, 97, 238, 0.08); }
.section-icon.blue svg { stroke: var(--accent-blue); }
.section-icon.purple { background: rgba(124, 58, 237, 0.08); }
.section-icon.purple svg { stroke: var(--accent-purple); }
.section-icon.teal { background: rgba(13, 148, 136, 0.08); }
.section-icon.teal svg { stroke: var(--accent-teal); }
.section-icon.amber { background: rgba(217, 119, 6, 0.08); }
.section-icon.amber svg { stroke: var(--accent-amber); }
.section-icon.rose { background: rgba(225, 29, 72, 0.08); }
.section-icon.rose svg { stroke: var(--accent-rose); }
.section-icon.green { background: rgba(22, 163, 74, 0.08); }
.section-icon.green svg { stroke: var(--accent-green); }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.card:hover {
  border-color: var(--border-color);
  box-shadow: var(--shadow-card);
}

.cards-grid {
  display: grid;
  gap: 16px;
}

.cards-grid.cols-2 {
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
}

.cards-grid.cols-3 {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Card content elements */
.card-title {
  font-family: 'Rubik', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

/* Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid;
}

.tag.blue {
  color: var(--accent-blue);
  background: rgba(67, 97, 238, 0.06);
  border-color: rgba(67, 97, 238, 0.18);
}

.tag.purple {
  color: var(--accent-purple);
  background: rgba(124, 58, 237, 0.06);
  border-color: rgba(124, 58, 237, 0.18);
}

.tag.teal {
  color: var(--accent-teal);
  background: rgba(13, 148, 136, 0.06);
  border-color: rgba(13, 148, 136, 0.18);
}

.tag.amber {
  color: var(--accent-amber);
  background: rgba(217, 119, 6, 0.06);
  border-color: rgba(217, 119, 6, 0.18);
}

.tag.rose {
  color: var(--accent-rose);
  background: rgba(225, 29, 72, 0.06);
  border-color: rgba(225, 29, 72, 0.18);
}

.tag.green {
  color: var(--accent-green);
  background: rgba(22, 163, 74, 0.06);
  border-color: rgba(22, 163, 74, 0.18);
}

/* KPI Cards */
.kpi-card {
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.kpi-card:nth-child(3n+1)::before { background: var(--accent-blue); }
.kpi-card:nth-child(3n+2)::before { background: var(--accent-purple); }
.kpi-card:nth-child(3n)::before { background: var(--accent-teal); }

.kpi-target {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Rubik', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-blue);
  margin-top: 8px;
}

.kpi-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* User type cards */
.user-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.user-avatar:nth-of-type(1) {
  background: linear-gradient(135deg, rgba(67, 97, 238, 0.12), rgba(124, 58, 237, 0.12));
  color: var(--accent-blue);
}

.card-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
  margin-top: 16px;
}

/* Lists */
.list-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.list-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.list-item::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
  margin-top: 10px;
  flex-shrink: 0;
  opacity: 0.6;
}

/* Platform cards */
.platform-priority {
  display: inline-flex;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

.platform-priority.high {
  background: rgba(225, 29, 72, 0.07);
  color: var(--accent-rose);
  border: 1px solid rgba(225, 29, 72, 0.2);
}

.platform-priority.medium {
  background: rgba(217, 119, 6, 0.07);
  color: var(--accent-amber);
  border: 1px solid rgba(217, 119, 6, 0.2);
}

.platform-priority.low {
  background: rgba(22, 163, 74, 0.07);
  color: var(--accent-green);
  border: 1px solid rgba(22, 163, 74, 0.2);
}

.tech-badge {
  direction: ltr;
  unicode-bidi: embed;
  display: inline-flex;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  background: var(--bg-accent);
  color: var(--accent-teal);
  font-family: 'Courier New', monospace;
}

/* Flow steps */
.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.flow-step {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  position: relative;
}

.flow-step:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 19px;
  top: 60px;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Rubik', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

.step-content {
  flex: 1;
  padding-top: 6px;
}

.step-content h4 {
  font-family: 'Rubik', sans-serif;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.step-content p {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.step-screen {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--accent-teal);
  margin-top: 6px;
}

/* Status lifecycle */
.lifecycle {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  padding: 16px 0;
}

.lifecycle-status {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.88rem;
  font-weight: 500;
  background: var(--bg-accent);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.lifecycle-arrow {
  color: var(--text-muted);
  padding: 0 8px;
  font-size: 1.2rem;
}

/* API Endpoint */
.endpoint-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.method-badge {
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  direction: ltr;
  unicode-bidi: embed;
}

.method-badge.GET { background: rgba(22, 163, 74, 0.1); color: var(--accent-green); }
.method-badge.POST { background: rgba(67, 97, 238, 0.1); color: var(--accent-blue); }
.method-badge.PUT { background: rgba(217, 119, 6, 0.1); color: var(--accent-amber); }
.method-badge.DELETE { background: rgba(225, 29, 72, 0.1); color: var(--accent-rose); }

.endpoint-path {
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  color: var(--text-primary);
  direction: ltr;
  unicode-bidi: embed;
}

.auth-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
}

.auth-badge.required {
  background: rgba(217, 119, 6, 0.07);
  color: var(--accent-amber);
  border: 1px solid rgba(217, 119, 6, 0.2);
}

.auth-badge.none {
  background: rgba(22, 163, 74, 0.07);
  color: var(--accent-green);
  border: 1px solid rgba(22, 163, 74, 0.2);
}

/* Screen spec */
.screen-card {
  border-right: 3px solid var(--accent-purple);
}

.screen-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.screen-detail-group h4 {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Table-like layouts */
.info-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.info-row:last-child {
  border-bottom: none;
}

.info-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  min-width: 120px;
  flex-shrink: 0;
}

.info-value {
  font-size: 0.92rem;
  color: var(--text-primary);
}

/* Transitions table */
.transition-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-accent);
  border-radius: var(--radius-md);
}

.transition-from,
.transition-to {
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
}

.transition-from {
  background: rgba(225, 29, 72, 0.07);
  color: var(--accent-rose);
  border: 1px solid rgba(225, 29, 72, 0.2);
}

.transition-to {
  background: rgba(22, 163, 74, 0.07);
  color: var(--accent-green);
  border: 1px solid rgba(22, 163, 74, 0.2);
}

.transition-arrow-icon {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.transition-details {
  flex: 1;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Schema fields */
.field-row {
  display: grid;
  grid-template-columns: 1fr 100px auto;
  gap: 16px;
  align-items: center;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
}

.field-row:hover {
  background: var(--bg-accent);
}

.field-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.92rem;
}

.field-type {
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  color: var(--accent-teal);
  direction: ltr;
  unicode-bidi: embed;
}

.field-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* JSON code block */
.code-block {
  background: var(--bg-accent);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  color: var(--accent-teal);
  direction: ltr;
  unicode-bidi: embed;
  overflow-x: auto;
  line-height: 1.8;
}

/* Notification channel */
.channel-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.channel-type {
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(67, 97, 238, 0.08);
  color: var(--accent-blue);
  border: 1px solid rgba(67, 97, 238, 0.2);
}

/* Test cases */
.test-priority {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.test-priority::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.test-priority.high::before { background: var(--accent-rose); }
.test-priority.medium::before { background: var(--accent-amber); }
.test-priority.low::before { background: var(--accent-green); }

/* Summary cards at top */
.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.summary-stat {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: all 0.25s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.summary-stat:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.summary-stat .stat-value {
  font-family: 'Rubik', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.summary-stat .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== DOCUMENT / PROSE STYLES ===== */
.section-background {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 28px;
  max-width: 860px;
}

.narrative-block {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 20px;
  padding: 20px 24px;
  background: var(--bg-accent);
  border-radius: var(--radius-md);
  border-right: 3px solid var(--accent-blue);
}

.narrative-block.purple-border { border-right-color: var(--accent-purple); }
.narrative-block.teal-border { border-right-color: var(--accent-teal); }
.narrative-block.amber-border { border-right-color: var(--accent-amber); }
.narrative-block.rose-border { border-right-color: var(--accent-rose); }

.prose {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 16px;
}

.card-narrative {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.platform-narrative {
  margin-bottom: 20px;
}

.platform-narrative .narrative-block {
  margin-bottom: 16px;
}

.platform-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.screen-narrative {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 16px;
  padding: 16px;
  background: rgba(67, 97, 238, 0.03);
  border-radius: var(--radius-sm);
}

.screen-layout-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}

.action-item {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  margin-bottom: 8px;
  background: var(--bg-secondary);
}

.action-item-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.action-item-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.action-item-trigger {
  font-size: 0.78rem;
  color: var(--accent-blue);
  margin-top: 4px;
}

.state-item {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  margin-bottom: 8px;
  background: var(--bg-secondary);
}

.state-item-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.state-item-name::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-purple);
  flex-shrink: 0;
}

.state-item-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-right: 16px;
}

.nav-links-block {
  display: flex;
  gap: 24px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.nav-links-group {
  font-size: 0.85rem;
}

.nav-links-group .nav-links-label {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.step-expected {
  font-size: 0.82rem;
  color: var(--accent-green);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.step-expected::before {
  content: '✓';
  font-weight: 700;
}

.preconditions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.side-effects {
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--accent-amber);
}

.security-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.security-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 8px 12px;
  background: rgba(225, 29, 72, 0.03);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(225, 29, 72, 0.1);
}

.security-item::before {
  content: '🛡';
  flex-shrink: 0;
}

/* Edge case cards */
.edge-case-card {
  border-right: 3px solid var(--accent-amber);
}

.mitigation-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-green);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 12px;
  margin-bottom: 4px;
}

/* Tab content switching */
.section {
  display: none;
}

.section.active {
  display: block;
}

/* Collapsible screen cards */
.screen-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 20px 28px;
  margin: -28px -28px 0;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  transition: background 0.2s ease;
  user-select: none;
}

.screen-card-header:hover {
  background: var(--bg-accent);
}

.screen-card-header .header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.screen-card-header .header-right .card-title {
  margin-bottom: 0;
}

.screen-card-header .header-purpose {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-right: 8px;
}

.screen-card-chevron {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.screen-card-chevron svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.screen-card.collapsed .screen-card-chevron {
  transform: rotate(-90deg);
}

.screen-card.collapsed .screen-card-body {
  display: none;
}

.screen-card-body {
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  margin-top: 20px;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Loading spinner */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
  .viewer {
    padding: 0 16px 60px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .cards-grid.cols-2,
  .cards-grid.cols-3 {
    grid-template-columns: 1fr;
  }

  .nav-bar {
    margin: 0 -16px;
    padding: 0 16px;
  }

  .field-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .transition-card {
    flex-direction: column;
    text-align: center;
  }

  .back-btn {
    bottom: 16px;
    left: 16px;
  }
}