/* ==========================================================================
   Tech Rebellion — Site Stylesheet
   ========================================================================== */

/* Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Colour palette */
  --color-bg: #0a0a0a;
  --color-bg-elevated: #141414;
  --color-bg-subtle: #1a1a1a;
  --color-text: #f5f5f5;
  --color-text-muted: #a0a0a0;
  --color-text-dim: #6b6b6b;
  --color-accent: #c1121f;
  --color-accent-hover: #e11d2b;
  --color-border: #262626;
  --color-border-strong: #3a3a3a;

  /* Typography */
  --font-display: "Georgia", "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "SF Mono", "Monaco", "Consolas", monospace;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 6rem;
  --space-16: 8rem;

  /* Layout */
  --max-width: 72rem;
  --max-width-narrow: 44rem;
  --max-width-reading: 38rem;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  margin-bottom: var(--space-5);
}

h3 {
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  margin-bottom: var(--space-4);
}

h4 {
  font-size: 1.125rem;
  margin-bottom: var(--space-3);
}

p {
  margin-bottom: var(--space-4);
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 150ms ease;
}

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

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

/* Layout primitives
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

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

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

.section {
  padding: var(--space-12) 0;
}

.section-lg {
  padding: var(--space-16) 0;
}

.section-divider {
  border-top: 1px solid var(--color-border);
}

/* Header & navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-brand:hover {
  color: var(--color-text);
}

.site-brand-mark {
  color: var(--color-accent);
  font-size: 1.5rem;
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav a {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color 150ms ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-2);
}

/* Hero
   -------------------------------------------------------------------------- */
.hero {
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-5);
}

.hero h1 {
  margin-bottom: var(--space-5);
}

.hero-tagline {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--color-text-muted);
  max-width: 38rem;
  line-height: 1.5;
}

.hero-flag {
  position: absolute;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-accent) 0%, transparent 100%);
  opacity: 0.6;
}

/* Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 150ms ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-text);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-text);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* Cards
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  padding: var(--space-6);
  transition: border-color 200ms ease, transform 200ms ease;
}

.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card-link:hover {
  color: inherit;
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.card-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-3);
}

.card-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card-status.active {
  color: var(--color-accent);
}

.card h3 {
  margin-bottom: var(--space-3);
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* Project grid
   -------------------------------------------------------------------------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-8);
}

/* Feature list (Secret Mission page)
   -------------------------------------------------------------------------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.feature {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-4);
}

.feature h3 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  letter-spacing: 0;
}

.feature p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin: 0;
}

/* Principles list (About page)
   -------------------------------------------------------------------------- */
.principle {
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-border);
}

.principle:last-child {
  border-bottom: none;
}

.principle-number {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}

.principle h3 {
  margin-bottom: var(--space-3);
}

.principle p {
  color: var(--color-text-muted);
}

/* Privacy policy
   -------------------------------------------------------------------------- */
.policy {
  padding: var(--space-12) 0;
}

.policy h2 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  font-size: 1.5rem;
}

.policy h2:first-of-type {
  margin-top: 0;
}

.policy p {
  color: var(--color-text);
}

.policy .meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.policy .short-version {
  background-color: var(--color-bg-elevated);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-8);
}

.policy .short-version h2 {
  margin-top: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: var(--space-3);
}

.policy .short-version p:last-child {
  margin-bottom: 0;
}

/* FAQ
   -------------------------------------------------------------------------- */
.faq {
  margin-top: var(--space-8);
}

.faq details {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-5) 0;
}

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

.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.0625rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 1.25rem;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform 200ms ease;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
}

/* Callout / notice
   -------------------------------------------------------------------------- */
.callout {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0;
}

.callout-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-2);
}

/* Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0 var(--space-6);
  margin-top: var(--space-16);
}

.site-footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-5);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.site-footer .site-brand {
  font-size: 1rem;
}

.footer-meta {
  display: flex;
  gap: var(--space-5);
  font-size: 0.875rem;
  color: var(--color-text-dim);
}

.footer-meta a {
  color: var(--color-text-muted);
}

.footer-meta a:hover {
  color: var(--color-text);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  text-align: center;
  width: 100%;
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

/* Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) var(--space-5);
  }

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

  .site-nav a {
    display: block;
    width: 100%;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav a:last-child {
    border-bottom: none;
  }

  .hero {
    padding: var(--space-10) 0 var(--space-8);
  }

  .section {
    padding: var(--space-10) 0;
  }

  .section-lg {
    padding: var(--space-12) 0;
  }

  .site-footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}