/* ================================================================
   MPL.AI Design System — styles.css
   Pure monochrome: black / white / gray only
   Dark/light mode via html.dark selector
================================================================ */

/* ── Brand Tokens ─────────────────────────────────────────────── */
:root {
  /* Accent: pure white on dark / pure black on light */
  --accent:         #000000;
  --accent-inv:     #ffffff;

  /* Dark surfaces */
  --dark:           #0a0a0a;
  --dark-surface:   #141414;
  --dark-surface-2: #1e1e1e;
  --dark-border:    rgba(255,255,255,0.08);

  /* Light surfaces */
  --light:          #ffffff;
  --light-bg:       #f5f5f5;
  --light-surface:  #ebebeb;

  /* Text */
  --text-primary:   #0a0a0a;
  --text-secondary: #6b6b6b;
  --text-muted:     #a0a0a0;

  /* Borders */
  --border:         rgba(0,0,0,0.10);

  /* Radii */
  --radius:         10px;
  --radius-lg:      16px;
  --radius-xl:      24px;

  /* Shadows */
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:      0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:      0 8px 32px rgba(0,0,0,0.14);

  /* Layout */
  --nav-h:          68px;
  --container-max:  1200px;
  --section-py:     96px;
}

html.dark {
  --accent:         #ffffff;
  --accent-inv:     #000000;
  --text-primary:   #f0f0f0;
  --text-secondary: rgba(240,240,240,0.55);
  --text-muted:     rgba(240,240,240,0.30);
  --border:         rgba(255,255,255,0.08);
  --light-bg:       #0a0a0a;
  --light-surface:  #141414;
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.40);
  --shadow-md:      0 4px 16px rgba(0,0,0,0.50);
  --shadow-lg:      0 8px 32px rgba(0,0,0,0.60);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--light);
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s, color 0.2s;
}

html.dark body {
  background: var(--dark);
  color: var(--text-primary);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Typography ───────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Sora', system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

.display-xl { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; }
.display-lg { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; }
.display-md { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; }

.text-label {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.text-mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
}

/* ── Layout ───────────────────────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: var(--section-py) 0; }

.section-dark {
  background: var(--dark);
  color: var(--text-primary);
}
html.dark .section-dark { background: #050505; }

.section-slate {
  background: var(--light-bg);
}
html.dark .section-slate { background: var(--dark-surface); }

.section-white {
  background: var(--light);
}
html.dark .section-white { background: var(--dark); }

/* ── Navigation ───────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s, background 0.2s;
}

html.dark .site-nav {
  background: rgba(10,10,10,0.94);
  border-bottom-color: var(--dark-border);
}

.site-nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--light-bg);
}

html.dark .nav-links a:hover,
html.dark .nav-links a.active {
  background: var(--dark-surface);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.nav-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  color: var(--text-primary);
  transition: background 0.15s;
}

.nav-hamburger:hover { background: var(--light-bg); }
html.dark .nav-hamburger:hover { background: var(--dark-surface); }

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 24px 16px;
  background: var(--light);
  border-top: 1px solid var(--border);
}

html.dark .nav-mobile {
  background: var(--dark);
  border-top-color: var(--dark-border);
}

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

.nav-mobile a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 10px 12px;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}

.nav-mobile a:hover { color: var(--text-primary); background: var(--light-bg); }
html.dark .nav-mobile a:hover { background: var(--dark-surface); }

/* ── Buttons ──────────────────────────────────────────────────── */
/* Primary: solid black (light mode) / solid white (dark mode) */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--text-primary);
  color: var(--light) !important;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid var(--text-primary);
  transition: opacity 0.15s, transform 0.1s, box-shadow 0.15s;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary:hover {
  opacity: 0.85;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

html.dark .btn-primary {
  background: #ffffff;
  color: #0a0a0a !important;
  border-color: #ffffff;
}

/* Secondary: outlined */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: transparent;
  color: var(--text-primary) !important;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid var(--text-primary);
  transition: background 0.15s, transform 0.1s;
  text-decoration: none;
  cursor: pointer;
}

.btn-secondary:hover {
  background: var(--light-bg);
  transform: translateY(-1px);
}

html.dark .btn-secondary {
  color: #ffffff !important;
  border-color: rgba(255,255,255,0.50);
}

html.dark .btn-secondary:hover {
  background: var(--dark-surface);
}

/* White button (on dark backgrounds) */
.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: #fff;
  color: #0a0a0a !important;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid #fff;
  transition: opacity 0.15s, transform 0.1s, box-shadow 0.15s;
  text-decoration: none;
  cursor: pointer;
}

.btn-white:hover {
  opacity: 0.90;
  box-shadow: 0 4px 16px rgba(0,0,0,0.20);
  transform: translateY(-1px);
}

/* Ghost button (on dark backgrounds) */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: transparent;
  color: rgba(255,255,255,0.75) !important;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 2px solid rgba(255,255,255,0.22);
  transition: border-color 0.15s, color 0.15s;
  text-decoration: none;
  cursor: pointer;
}

.btn-ghost:hover {
  border-color: rgba(255,255,255,0.55);
  color: #fff !important;
}

/* Nav buttons */
.btn-nav-ghost {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  background: transparent;
  color: var(--text-secondary) !important;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 7px;
  border: 1px solid var(--border);
  transition: color 0.15s, border-color 0.15s;
  text-decoration: none;
}

.btn-nav-ghost:hover { color: var(--text-primary) !important; border-color: var(--text-secondary); }

.btn-nav-primary {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  background: var(--text-primary);
  color: var(--light) !important;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 7px;
  border: 1px solid var(--text-primary);
  transition: opacity 0.15s, box-shadow 0.15s;
  text-decoration: none;
}

.btn-nav-primary:hover {
  opacity: 0.80;
  box-shadow: var(--shadow-sm);
}

html.dark .btn-nav-primary {
  background: #ffffff;
  color: #0a0a0a !important;
  border-color: #ffffff;
}

/* ── Theme Toggle ─────────────────────────────────────────────── */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  color: var(--text-secondary);
  transition: background 0.15s, color 0.15s;
}

.theme-toggle:hover {
  background: var(--light-bg);
  color: var(--text-primary);
}

html.dark .theme-toggle:hover { background: var(--dark-surface); }

/* Icon visibility per mode */
html:not(.dark) .icon-moon { display: none; }
html.dark .icon-sun { display: none; }
html.dark .icon-moon { display: block; }

html:not(.dark) .theme-label-dark { display: none !important; }
html.dark .theme-label-light { display: none !important; }
html.dark .theme-label-dark { display: inline !important; }

/* Logo visibility per mode */
html:not(.dark) .logo-img-dark { display: none !important; }
html:not(.dark) .logo-img-light { display: block !important; }
html.dark .logo-img-light { display: none !important; }
html.dark .logo-img-dark { display: block !important; }

/* ── Language Switcher ────────────────────────────────────────── */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
}

.lang-flag-link {
  font-size: 1.1rem;
  line-height: 1;
  padding: 4px;
  border-radius: 4px;
  transition: transform 0.15s, background 0.15s;
  text-decoration: none;
}

.lang-flag-link:hover {
  transform: scale(1.2);
  background: var(--light-bg);
}

html.dark .lang-flag-link:hover { background: var(--dark-surface); }

/* ── Hero Section ─────────────────────────────────────────────── */
.section-hero {
  background: var(--dark);
  color: #fff;
  padding: 120px 0 96px;
  position: relative;
  overflow: hidden;
}

/* Subtle noise/grid texture on hero */
.section-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: rgba(255,255,255,0.70);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-family: 'Sora', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  margin-bottom: 24px;
}

/* Accent on hero: white underline instead of color */
.hero-title .accent {
  color: #fff;
  border-bottom: 3px solid rgba(255,255,255,0.45);
  padding-bottom: 2px;
}

.hero-subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: rgba(240,240,240,0.65);
  max-width: 600px;
  line-height: 1.65;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
}

.hero-stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.8125rem;
  color: rgba(240,240,240,0.50);
  margin-top: 4px;
}

/* ── Cards ────────────────────────────────────────────────────── */
.card {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: box-shadow 0.2s, transform 0.2s;
}

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

html.dark .card {
  background: var(--dark-surface);
  border-color: var(--dark-border);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--light-bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

html.dark .card-icon {
  background: var(--dark-surface-2);
  border-color: var(--dark-border);
  color: rgba(255,255,255,0.80);
}

.card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── Grid Layouts ─────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Section Headers ──────────────────────────────────────────── */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── Process / Steps ──────────────────────────────────────────── */
.step-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

/* ── Metric / KPI Blocks ──────────────────────────────────────── */
.metric-block {
  text-align: center;
  padding: 32px 24px;
}

.metric-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

html.dark .metric-value { color: #ffffff; }

.metric-label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* ── Dividers ─────────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

html.dark .divider { border-top-color: var(--dark-border); }

/* ── Badges / Tags ────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: var(--light-bg);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
  border: 1px solid var(--border);
}

html.dark .badge {
  background: var(--dark-surface-2);
  color: rgba(255,255,255,0.65);
  border-color: var(--dark-border);
}

.badge-active {
  background: var(--dark-surface-2);
  color: #fff;
  border-color: rgba(255,255,255,0.20);
}

/* ── Accordion (FAQ) ──────────────────────────────────────────── */
.accordion-item {
  border-bottom: 1px solid var(--border);
}

html.dark .accordion-item { border-bottom-color: var(--dark-border); }

.accordion-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  gap: 16px;
  transition: color 0.15s;
}

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

.accordion-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
  transition: transform 0.25s;
}

.accordion-item.open .accordion-icon { transform: rotate(45deg); }

.accordion-body {
  display: none;
  padding: 0 0 20px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.accordion-item.open .accordion-body { display: block; }

/* ── Forms ────────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9375rem;
  color: var(--text-primary);
  background: var(--light);
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}

html.dark .form-input,
html.dark .form-select,
html.dark .form-textarea {
  background: var(--dark-surface);
  border-color: var(--dark-border);
  color: var(--text-primary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--text-primary);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}

html.dark .form-input:focus,
html.dark .form-select:focus,
html.dark .form-textarea:focus {
  border-color: rgba(255,255,255,0.40);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.04);
}

.form-textarea { resize: vertical; min-height: 120px; }

/* ── Pricing Cards ────────────────────────────────────────────── */
.pricing-card {
  background: var(--light);
  border: 2px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  position: relative;
  transition: box-shadow 0.2s, transform 0.2s;
}

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

html.dark .pricing-card {
  background: var(--dark-surface);
  border-color: var(--dark-border);
}

.pricing-card.featured {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 1px var(--text-primary), var(--shadow-lg);
}

html.dark .pricing-card.featured {
  border-color: rgba(255,255,255,0.60);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.60), var(--shadow-lg);
}

.pricing-card-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--light);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 100px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

html.dark .pricing-card-badge {
  background: #ffffff;
  color: #0a0a0a;
}

.pricing-price {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.pricing-period {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-left: 4px;
}

.pricing-features {
  margin: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.pricing-feature-icon {
  width: 18px;
  height: 18px;
  color: var(--text-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

html.dark .pricing-feature-icon { color: rgba(255,255,255,0.70); }

/* ── Blog ─────────────────────────────────────────────────────── */
.blog-card {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}

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

html.dark .blog-card {
  background: var(--dark-surface);
  border-color: var(--dark-border);
}

.blog-card-body { padding: 24px; }

.blog-card-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.blog-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Footer ───────────────────────────────────────────────────── */
.site-footer {
  background: var(--dark);
  color: rgba(240,240,240,0.60);
  padding: 72px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand p {
  font-size: 0.9375rem;
  line-height: 1.65;
  margin-top: 16px;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(240,240,240,0.45);
  transition: background 0.15s, color 0.15s;
}

.footer-social a:hover {
  background: rgba(255,255,255,0.12);
  color: rgba(240,240,240,0.90);
}

.footer-col h4 {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8125rem;
  font-weight: 700;
  color: rgba(240,240,240,0.90);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }

.footer-col a {
  font-size: 0.9rem;
  color: rgba(240,240,240,0.50);
  transition: color 0.15s;
}

.footer-col a:hover { color: rgba(240,240,240,0.90); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 32px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.8125rem;
  color: rgba(240,240,240,0.30);
}

/* ── Scroll Animations ────────────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Auth Pages ───────────────────────────────────────────────── */
.auth-page {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  background: var(--light-bg);
}

html.dark .auth-page { background: var(--dark); }

.auth-card {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}

html.dark .auth-card {
  background: var(--dark-surface);
  border-color: var(--dark-border);
}

/* ── Simulation / Terminal ────────────────────────────────────── */
.sim-terminal {
  background: #0a0a0a;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
}

.sim-terminal-bar {
  background: #1a1a1a;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

.sim-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
}

.sim-terminal-title {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.40);
  margin-left: 4px;
}

.sim-terminal-body {
  padding: 20px;
  min-height: 280px;
  color: rgba(255,255,255,0.80);
  line-height: 1.8;
  overflow-y: auto;
  max-height: 420px;
}

.sim-line { display: flex; gap: 10px; margin-bottom: 4px; }
.sim-prompt { color: rgba(255,255,255,0.25); flex-shrink: 0; }
.sim-text { color: rgba(255,255,255,0.75); }
.sim-text.dim { color: rgba(255,255,255,0.35); }
.sim-text.bold { color: #ffffff; font-weight: 600; }
.sim-text.success { color: #e0e0e0; }
.sim-cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background: rgba(255,255,255,0.70);
  animation: blink 1s step-end infinite;
  vertical-align: middle;
  margin-left: 2px;
}

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

/* Scenario selector tabs */
.sim-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.sim-tab {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
  transition: all 0.15s;
}

.sim-tab:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.sim-tab.active {
  background: var(--text-primary);
  color: var(--light);
  border-color: var(--text-primary);
}

html.dark .sim-tab.active {
  background: #ffffff;
  color: #0a0a0a;
  border-color: #ffffff;
}

/* KPI bar */
.sim-kpi-bar {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  padding: 16px 20px;
  background: #111111;
  border-top: 1px solid rgba(255,255,255,0.07);
}

.sim-kpi {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sim-kpi-label {
  font-size: 0.6875rem;
  color: rgba(255,255,255,0.35);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: 'JetBrains Mono', monospace;
}

.sim-kpi-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --section-py: 64px; }
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
  .hero-stats { gap: 32px; }
  .auth-card { padding: 32px 24px; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary,
  .hero-actions .btn-ghost { width: 100%; justify-content: center; }
}

/* ── Utility ──────────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-accent { color: var(--text-primary); }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }
.gap-2 { gap: 8px; }
.flex { display: flex; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.flex-wrap { flex-wrap: wrap; }
.items-between { justify-content: space-between; }