/* =============================================
   Composer Atlas: Main Stylesheet
   Dark design system with CSS custom properties
   ============================================= */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* ---- Design Tokens ---- */
:root {
  --color-bg: #0d0d0d;
  --color-surface: #141414;
  --color-surface-raised: #1a1a1a;
  --color-border: #1f1f1f;
  --color-border-hover: #2e2e2e;
  --color-primary: #f0f0f0;
  --color-secondary: #b0b0b0;
  --color-disabled: #c0c0c0;
  --color-green: #00e676;
  --color-pink: #ff4d8d;
  --color-blue: #4d9fff;
  --color-yellow: #f5c518;
  --color-purple: #a78bfa;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --nav-height: 56px;
  --max-width: 1280px;
  --page-px: 24px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--color-bg);
  color: var(--color-primary);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

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

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-px);
}

.page {
  flex: 1;
  padding-top: var(--nav-height);
}

/* ---- Typography ---- */
h1 { font-size: 2rem; font-weight: 700; line-height: 1.2; }
h2 { font-size: 1.375rem; font-weight: 700; line-height: 1.3; }
h3 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; }
h4 { font-size: 0.9375rem; font-weight: 600; }

p { color: var(--color-secondary); }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-disabled { color: var(--color-disabled); }
.text-green { color: var(--color-green); }
.text-pink { color: var(--color-pink); }
.text-blue { color: var(--color-blue); }
.text-yellow { color: var(--color-yellow); }
.text-purple { color: var(--color-purple); }
.font-mono { font-family: var(--font-mono); }

.label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-disabled);
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-px);
  gap: 16px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-primary);
  transition: color 0.15s;
  flex-shrink: 0;
}

.nav-logo:hover { color: var(--color-green); }

.nav-logo-mark {
  font-family: 'Segoe UI Emoji', 'Apple Color Emoji', 'Noto Color Emoji', sans-serif;
  font-size: 1.25rem;
  line-height: 1;
}

.nav-logo-text {
  display: none;
}

@media (min-width: 480px) {
  .nav-logo-text { display: inline; }
}

.nav-links {
  display: none;
  align-items: center;
  gap: 4px;
}

@media (min-width: 768px) {
  .nav-links { display: flex; }
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-secondary);
  transition: color 0.15s, background 0.15s;
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-surface);
}

.nav-link.active {
  color: var(--color-primary);
  background: var(--color-surface);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-cta {
  display: none;
}

@media (min-width: 768px) {
  .nav-cta { display: inline-flex; }
}

.nav-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  padding: 8px;
  transition: background 0.15s;
  flex-shrink: 0;
}

.nav-hamburger:hover { background: var(--color-surface); }

.nav-hamburger span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (min-width: 768px) {
  .nav-hamburger { display: none; }
}

/* Mobile nav drawer */
.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  gap: 2px;
}

.nav-mobile.open { display: flex; }

.mobile-nav-link {
  display: block;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: var(--color-secondary);
  transition: color 0.15s, background 0.15s;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--color-primary);
  background: var(--color-surface);
}

.mobile-nav-cta {
  margin-top: 8px;
  justify-content: center;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  transition: opacity 0.15s, background 0.15s, color 0.15s, border-color 0.15s;
  cursor: pointer;
  white-space: nowrap;
}

.btn-green {
  background: var(--color-green);
  color: var(--color-bg);
  border: 1px solid transparent;
}

.btn-green:hover { opacity: 0.9; }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface);
}

.btn-outline-green {
  background: transparent;
  color: var(--color-green);
  border: 1px solid var(--color-green);
  font-size: 0.8125rem;
  padding: 5px 12px;
}

.btn-outline-green:hover {
  background: var(--color-green);
  color: var(--color-bg);
}

.btn-sm {
  padding: 5px 12px;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 11px 22px;
  font-size: 0.9375rem;
}

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color 0.15s;
  display: flex;
  flex-direction: column;
}

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

.card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
  margin-bottom: 8px;
  transition: color 0.15s;
}

.card:hover .card-title { color: var(--color-green); }

.card-title a { color: inherit; text-decoration: none; }

.card-desc {
  font-size: 0.875rem;
  color: var(--color-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

/* Strategy card metrics row */
.card-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.card-metric-label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-disabled);
  margin-bottom: 2px;
}

.card-metric-value {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Tags row */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
  min-height: 22px;
}

.card-footer {
  margin-top: auto;
}

/* ---- Tags (GlossaryTag pills) ---- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid;
  transition: opacity 0.15s;
  cursor: pointer;
}

.tag:hover { opacity: 0.8; }

.tag-rsi, .tag-200d-ma { background: rgba(77, 159, 255, 0.08); color: var(--color-blue); border-color: rgba(77, 159, 255, 0.25); }
.tag-momentum { background: rgba(167, 139, 250, 0.08); color: var(--color-purple); border-color: rgba(167, 139, 250, 0.25); }
.tag-vix-tiers { background: rgba(245, 197, 24, 0.08); color: var(--color-yellow); border-color: rgba(245, 197, 24, 0.25); }
.tag-leveraged-etfs { background: rgba(255, 77, 141, 0.08); color: var(--color-pink); border-color: rgba(255, 77, 141, 0.25); }
.tag-sharpe-ratio, .tag-calmar-ratio, .tag-max-drawdown { background: rgba(0, 230, 118, 0.08); color: var(--color-green); border-color: rgba(0, 230, 118, 0.25); }
.tag-zoop { background: rgba(255, 149, 0, 0.08); color: #ff9500; border-color: rgba(255, 149, 0, 0.25); }
.tag-default { background: var(--color-surface-raised); color: var(--color-secondary); border-color: var(--color-border-hover); }

/* Category badge (ConceptCard) */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid;
}

.badge-indicator { background: rgba(77, 159, 255, 0.1); color: var(--color-blue); border-color: rgba(77, 159, 255, 0.2); }
.badge-risk-metric { background: rgba(255, 77, 141, 0.1); color: var(--color-pink); border-color: rgba(255, 77, 141, 0.2); }
.badge-asset-class { background: rgba(245, 197, 24, 0.1); color: var(--color-yellow); border-color: rgba(245, 197, 24, 0.2); }
.badge-strategy-concept { background: rgba(167, 139, 250, 0.1); color: var(--color-purple); border-color: rgba(167, 139, 250, 0.2); }

/* ---- Metrics Table ---- */
.metrics-section {
  margin-bottom: 20px;
}

.metrics-section-label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-disabled);
  margin-bottom: 8px;
}

.metrics-table {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.metrics-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
}

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

.metrics-row dt {
  font-size: 0.875rem;
  color: var(--color-secondary);
}

.metrics-row dd {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ---- Grid layouts ---- */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 1024px) {
  .grid-2 { grid-template-columns: 2fr 1fr; }
}

/* ---- Detail page layout ---- */
.detail-main { min-width: 0; }

.detail-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

@media (min-width: 1024px) {
  .detail-sidebar-sticky {
    position: sticky;
    top: calc(var(--nav-height) + 20px);
  }
}

/* ---- Compact strategy list (sidebar) ---- */
.strategy-list-compact {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.strategy-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  transition: background 0.15s;
  color: var(--color-secondary);
  font-size: 0.875rem;
}

.strategy-list-item:last-child { border-bottom: none; }
.strategy-list-item:hover { background: var(--color-surface-raised); color: var(--color-primary); }

.strategy-list-item .arr {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  flex-shrink: 0;
}

/* ---- Hero section ---- */
.hero {
  padding: 64px 0 48px;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-green);
  margin-bottom: 12px;
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-primary);
  margin-bottom: 16px;
  max-width: 600px;
}

.hero-desc {
  font-size: 1.0625rem;
  color: var(--color-secondary);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---- Stats bar ---- */
.stats-bar {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 16px 0;
}

.stats-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-disabled);
  margin-top: 4px;
}

/* ---- Section headings ---- */
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 24px;
}

.section-header h2 { color: var(--color-primary); }

.section-count {
  font-size: 0.875rem;
  color: var(--color-secondary);
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-secondary);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb-sep { color: var(--color-disabled); }

.breadcrumb a {
  color: var(--color-secondary);
  transition: color 0.15s;
}

.breadcrumb a:hover { color: var(--color-primary); }

.breadcrumb .current {
  color: var(--color-primary);
}

/* ---- Signals list ---- */
.signal-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 8px;
}

.signal-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.signal-name {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.signal-desc {
  font-size: 0.875rem;
  color: var(--color-secondary);
  line-height: 1.6;
}

/* ---- Risk profile box ---- */
.risk-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 0.875rem;
  color: var(--color-secondary);
  line-height: 1.7;
}

/* ---- AI Summary box ---- */
.ai-summary {
  background: linear-gradient(180deg, rgba(167, 139, 250, 0.06), rgba(167, 139, 250, 0.02));
  border: 1px solid rgba(167, 139, 250, 0.25);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
}

.ai-summary-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.ai-summary-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background: rgba(167, 139, 250, 0.12);
  color: var(--color-purple);
  font-size: 0.875rem;
  line-height: 1;
}

.ai-summary-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.ai-summary-p {
  font-size: 0.9375rem;
  color: var(--color-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.ai-summary-p:last-child {
  margin-bottom: 0;
}

/* ---- Prose (glossary content) ---- */
.prose h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 28px 0 12px;
}

.prose h2:first-child { margin-top: 0; }

.prose p {
  font-size: 0.9375rem;
  color: var(--color-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.prose p:last-child { margin-bottom: 0; }

.prose strong { color: var(--color-primary); font-weight: 600; }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--color-green);
  background: rgba(0, 230, 118, 0.08);
  padding: 1px 5px;
  border-radius: 3px;
}

.prose pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  margin: 16px 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-primary);
  line-height: 1.6;
}

.prose pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.875rem;
}

.prose th {
  text-align: left;
  padding: 8px 12px;
  background: var(--color-surface-raised);
  color: var(--color-primary);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
}

.prose td {
  padding: 8px 12px;
  color: var(--color-secondary);
  border-bottom: 1px solid var(--color-border);
}

.prose ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 14px;
}

.prose li {
  color: var(--color-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 6px;
}

/* ---- Formula box ---- */
.formula-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-top: 16px;
}

.formula-label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-disabled);
  margin-bottom: 6px;
}

.formula-value {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-green);
}

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 2rem;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 1rem;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--color-secondary);
  transition: color 0.15s;
}

.footer-links a:hover { color: var(--color-primary); }

.footer-legal {
  font-size: 0.75rem;
  color: var(--color-secondary);
  line-height: 1.6;
  max-width: 560px;
  margin: 0 auto 0.5rem;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--color-secondary);
}

.footer-copy a {
  color: var(--color-blue);
  text-decoration: none;
}

.footer-copy a:hover { color: var(--color-primary); }

/* ---- Loading state ---- */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-green);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ---- Error state ---- */
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  text-align: center;
  gap: 12px;
}

.error-state h2 { color: var(--color-primary); }
.error-state p { color: var(--color-secondary); }

/* ---- 404 / empty state ---- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
  gap: 16px;
  padding: 48px 24px;
}

.empty-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-green);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.empty-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.empty-desc { max-width: 380px; }

.empty-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 8px;
}

/* ---- Section padding ---- */
.py-12 { padding-top: 48px; padding-bottom: 48px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.mb-10 { margin-bottom: 40px; }

/* ---- About page prose ---- */
.about-content {
  max-width: 720px;
}

.about-content h2 {
  color: var(--color-primary);
  margin-top: 40px;
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.about-content p {
  font-size: 0.9375rem;
  color: var(--color-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.about-content ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 16px;
}

.about-content li {
  font-size: 0.9375rem;
  color: var(--color-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
}

.about-content strong { color: var(--color-primary); }

.about-content a {
  color: var(--color-green);
  transition: opacity 0.15s;
}

.about-content a:hover { opacity: 0.8; }