/* ============================
   NEXUS-MIRROR.COM — DESIGN SYSTEM
   Minimalist AI-Tech Corporate Interface
   ============================ */

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

/* ---- CSS Custom Properties ---- */
:root {
  /* Backgrounds */
  --bg-light: #cfd3da;
  --bg-mid: #aeb4be;
  --bg-gradient: linear-gradient(145deg, #d4d8df 0%, #c0c5cd 40%, #aeb4be 100%);

  /* Panels */
  --panel-dark: #111111;
  --panel-charcoal: #161616;
  --panel-graphite: #1b1b1b;
  --panel-surface: #1f1f1f;
  --panel-elevated: #252525;
  --panel-border: #2a2a2a;
  --panel-border-light: #333333;

  /* Foreground */
  --text-primary: #f2f2f2;
  --text-secondary: #9a9a9a;
  --text-muted: #6b6b6b;
  --text-dark: #111111;
  --text-on-light: #1b1b1b;

  /* Accents */
  --accent-white: #f2f2f2;
  --accent-gray: #9a9a9a;
  --accent-line: rgba(242,242,242,0.08);
  --accent-hover: rgba(242,242,242,0.04);

  /* Status */
  --color-green: #4a7c59;
  --color-green-light: #5a9c6c;
  --color-amber: #8a7040;
  --color-red: #7c4a4a;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Shadows */
  --shadow-card: 0 2px 12px rgba(0,0,0,0.4);
  --shadow-elevated: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-hero: 0 20px 60px rgba(0,0,0,0.3);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Layout */
  --container-max: 1200px;
  --container-wide: 1400px;
  --nav-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-gradient);
  color: var(--text-on-light);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul, ol { list-style: none; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }

p {
  line-height: 1.75;
  color: var(--text-on-light);
}

.text-light { color: var(--text-primary); }
.text-muted { color: var(--text-secondary); }
.text-small { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }

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

.container--wide {
  max-width: var(--container-wide);
}

.section {
  padding: var(--space-4xl) 0;
}

.section--dark {
  background: var(--panel-dark);
  color: var(--text-primary);
}

.section--dark p { color: var(--text-secondary); }
.section--dark h2, .section--dark h3 { color: var(--text-primary); }

.section--charcoal {
  background: var(--panel-charcoal);
  color: var(--text-primary);
}

.section--charcoal p { color: var(--text-secondary); }
.section--charcoal h2, .section--charcoal h3 { color: var(--text-primary); }

.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-gray);
  margin-bottom: var(--space-sm);
}

.section-header {
  margin-bottom: var(--space-2xl);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.flex { display: flex; }
.flex--center { align-items: center; justify-content: center; }
.flex--between { align-items: center; justify-content: space-between; }
.flex--gap { gap: var(--space-md); }

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(17,17,17,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--panel-border);
  z-index: 1000;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav__logo img {
  height: 40px;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__link {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.5rem 1.25rem;
  background: var(--text-primary);
  color: var(--panel-dark);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), opacity var(--transition-fast);
}

.nav__cta:hover { background: #d8d8d8; }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-sm);
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  transition: var(--transition-fast);
}

.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--panel-dark);
  border-bottom: 1px solid var(--panel-border);
  padding: var(--space-lg) var(--space-xl);
  z-index: 999;
}

.nav__mobile.open { display: block; }

.nav__mobile .nav__link {
  display: block;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--panel-border);
}

.nav__mobile .nav__link:last-child { border-bottom: none; }

/* ---- Hero ---- */
.hero {
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-4xl);
  display: flex;
  align-items: center;
  background: var(--bg-gradient);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse 60% 50% at 75% 50%, rgba(100,110,130,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  width: 100%;
}

.hero__label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--panel-dark);
  margin-bottom: var(--space-lg);
}

.hero__title span {
  color: var(--panel-graphite);
  display: block;
  font-weight: 300;
  font-size: 0.65em;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero__subtitle {
  font-size: 1rem;
  line-height: 1.7;
  color: #3a3a3a;
  max-width: 480px;
  margin-bottom: var(--space-2xl);
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__canvas-wrap {
  position: relative;
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1;
}

#hero-canvas {
  width: 100% !important;
  height: 100% !important;
}

/* Screenshot hero variant */
.hero__screenshot {
  width: 100%;
  max-width: 580px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hero);
  border: 1px solid rgba(0,0,0,0.15);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.8rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--panel-dark);
  color: var(--text-primary);
}

.btn--primary:hover {
  background: var(--panel-graphite);
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
}

.btn--secondary {
  background: transparent;
  color: var(--panel-dark);
  border: 1.5px solid rgba(17,17,17,0.35);
}

.btn--secondary:hover {
  background: rgba(17,17,17,0.06);
  border-color: rgba(17,17,17,0.55);
}

.btn--outline-light {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--panel-border-light);
}

.btn--outline-light:hover {
  background: var(--accent-hover);
  border-color: var(--accent-gray);
}

.btn--ghost {
  background: var(--panel-elevated);
  color: var(--text-primary);
}

.btn--ghost:hover {
  background: var(--panel-border-light);
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
}

.btn--lg {
  padding: 1rem 2.5rem;
  font-size: 0.9rem;
}

/* ---- Cards ---- */
.card {
  background: var(--panel-charcoal);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-elevated);
}

.card__icon {
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-lg);
  opacity: 0.85;
}

.card__image {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-lg);
  opacity: 0.9;
}

.card__label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.card__text {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

.card--light {
  background: rgba(255,255,255,0.45);
  border-color: rgba(255,255,255,0.6);
  color: var(--text-on-light);
}

.card--light .card__title { color: var(--panel-dark); }
.card--light .card__text { color: #3a3a3a; }
.card--light .card__label { color: var(--text-muted); }

.card--stat {
  text-align: center;
  padding: var(--space-2xl);
}

.card__stat-number {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.card__stat-label {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ---- Feature Grid ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--panel-charcoal);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
}

.feature-card__img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  opacity: 0.85;
}

.feature-card__body {
  padding: var(--space-lg);
}

.feature-card__num {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.feature-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.feature-card__text {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ---- News Grid ---- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.news-card {
  background: var(--panel-charcoal);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
}

.news-card__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  opacity: 0.88;
}

.news-card__body {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.news-card__date {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.news-card__category {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--panel-border);
  padding: 2px 8px;
  border-radius: 2px;
}

.news-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}

.news-card__excerpt {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
  flex: 1;
}

/* ---- FAQ ---- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--panel-border);
}

.faq-item:first-child { border-top: 1px solid var(--panel-border); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  gap: var(--space-lg);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
}

.faq-question:hover { color: var(--accent-white); }

.faq-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  border: 1.5px solid var(--panel-border-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base), border-color var(--transition-fast);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  border-color: var(--accent-gray);
  color: var(--text-primary);
}

.faq-answer {
  display: none;
  padding: 0 0 var(--space-lg) 0;
  font-size: 0.925rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.faq-answer p { color: var(--text-secondary); }
.faq-answer a { color: var(--accent-white); text-decoration: underline; }

.faq-item.open .faq-answer { display: block; }

/* ---- Tags & Badges ---- */
.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 2px;
  background: var(--panel-border);
  color: var(--text-muted);
}

.tag--green {
  background: rgba(74,124,89,0.2);
  color: #6ab87d;
}

.tag--amber {
  background: rgba(138,112,64,0.2);
  color: #c9a456;
}

/* ---- Onion Links (Enter Marketplace) ---- */
.onion-card {
  background: var(--panel-surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-bottom: var(--space-md);
}

.onion-card__label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.onion-card__label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-green-light);
}

.onion-card__url {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9rem;
  color: var(--text-primary);
  word-break: break-all;
  line-height: 1.6;
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  background: var(--panel-dark);
  border-radius: var(--radius-sm);
  border: 1px solid var(--panel-border);
}

.onion-card__copy {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.45rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--panel-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--panel-border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.onion-card__copy:hover {
  background: var(--panel-border-light);
  color: var(--text-primary);
}

.onion-card__copy.copied {
  color: #6ab87d;
  border-color: rgba(74,124,89,0.4);
}

/* ---- PGP Block ---- */
.pgp-block {
  background: var(--panel-dark);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--text-secondary);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ---- Stats / Charts area ---- */
.stats-bar {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.stat-item {
  flex: 1;
  min-width: 140px;
  background: var(--panel-surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.stat-item__number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-item__label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ---- Breadcrumbs ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: var(--space-md) 0;
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--text-primary); }
.breadcrumb__sep { color: var(--text-muted); }
.breadcrumb__current { color: var(--text-primary); }

/* ---- Page Hero (inner pages) ---- */
.page-hero {
  background: var(--panel-dark);
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
  border-bottom: 1px solid var(--panel-border);
}

.page-hero__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.page-hero__label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.page-hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

.page-hero__subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 640px;
}

/* ---- Dividers ---- */
.divider {
  height: 1px;
  background: var(--accent-line);
  margin: var(--space-2xl) 0;
}

/* ---- Inline info blocks ---- */
.info-block {
  background: var(--panel-elevated);
  border-left: 3px solid var(--panel-border-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}

.info-block--warn {
  border-left-color: var(--color-amber);
  background: rgba(138,112,64,0.08);
}

.info-block--danger {
  border-left-color: var(--color-red);
  background: rgba(124,74,74,0.08);
}

.info-block--success {
  border-left-color: var(--color-green);
  background: rgba(74,124,89,0.08);
}

/* ---- Inline guide steps ---- */
.steps-list {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.step {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.step__num {
  counter-increment: step;
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  background: var(--panel-elevated);
  border: 1.5px solid var(--panel-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.step__num::before { content: counter(step); }

.step__content {
  flex: 1;
}

.step__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.step__text {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* ---- Tabs ---- */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--panel-dark);
  padding: 4px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.5rem 1rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-radius: var(--radius-sm) - 2px;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.tab-btn:hover { color: var(--text-primary); background: var(--panel-elevated); }

.tab-btn.active {
  background: var(--panel-elevated);
  color: var(--text-primary);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---- Footer ---- */
.footer {
  background: var(--panel-dark);
  border-top: 1px solid var(--panel-border);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand img {
  height: 36px;
  margin-bottom: var(--space-lg);
}

.footer__brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.footer__col-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer__link:hover { color: var(--text-secondary); }

.footer__bottom {
  border-top: 1px solid var(--panel-border);
  padding-top: var(--space-xl);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.footer__disclaimer {
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 700px;
}

.footer__meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ---- Animations ---- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.animate-fade-up {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-up--delay-1 { animation-delay: 0.1s; }
.animate-fade-up--delay-2 { animation-delay: 0.2s; }
.animate-fade-up--delay-3 { animation-delay: 0.35s; }
.animate-fade-up--delay-4 { animation-delay: 0.5s; }

/* ---- Content prose ---- */
.prose {
  max-width: 760px;
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-2xl) 0 var(--space-md);
}

.prose h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-xl) 0 var(--space-sm);
}

.prose p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.prose ul, .prose ol {
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
}

.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }

.prose li {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.prose a {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover { color: var(--accent-white); }

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

.prose blockquote {
  border-left: 3px solid var(--panel-border-light);
  padding-left: var(--space-lg);
  margin: var(--space-lg) 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* ---- Two column layout (article + sidebar) ---- */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-3xl);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-lg));
}

.sidebar-card {
  background: var(--panel-surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.sidebar-card__title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--panel-border);
}

.sidebar-toc {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.sidebar-toc a {
  font-size: 0.825rem;
  color: var(--text-muted);
  padding: 4px 0;
  border-left: 2px solid transparent;
  padding-left: var(--space-sm);
  transition: all var(--transition-fast);
}

.sidebar-toc a:hover {
  color: var(--text-primary);
  border-left-color: var(--accent-gray);
}

/* ---- Chart placeholder (canvas based) ---- */
.chart-container {
  background: var(--panel-surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
}

.chart-container canvas {
  max-height: 300px;
}

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-2xl); }
  .content-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}

@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .hero__visual { display: none; }
  .grid--3 { grid-template-columns: 1fr 1fr; }
  .grid--4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
  .features-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .grid--2 { grid-template-columns: 1fr; }
  .grid--3 { grid-template-columns: 1fr; }
  .grid--4 { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .footer__bottom { flex-direction: column; }
  .stats-bar { flex-direction: column; }
  :root { --space-4xl: 4rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .grid--4 { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; }
  .btn--lg { width: 100%; justify-content: center; }
}

/* ---- Utility classes ---- */
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }

.pt-nav { padding-top: var(--nav-height); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.hidden { display: none !important; }

.opacity-70 { opacity: 0.7; }
.opacity-50 { opacity: 0.5; }

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track { background: var(--panel-dark); }
::-webkit-scrollbar-thumb {
  background: var(--panel-border-light);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---- Print ---- */
@media print {
  .nav, .footer { display: none; }
  body { background: white; color: black; }
}