/* ============================================
   Goami — Landing site
   Design tokens dérivés du DESIGN_SYSTEM.md V2.3
   ============================================ */

:root {
  /* Couleurs neutres - Light */
  --neutral-0: #FFFFFF;
  --neutral-50: #FAFAFA;
  --neutral-100: #F4F4F5;
  --neutral-200: #E4E4E7;
  --neutral-300: #D4D4D8;
  --neutral-400: #A1A1AA;
  --neutral-500: #71717A;
  --neutral-600: #52525B;
  --neutral-700: #3F3F46;
  --neutral-800: #27272A;
  --neutral-1000: #000000;

  /* Tokens sémantiques */
  --bg-canvas: var(--neutral-0);
  --bg-surface: var(--neutral-50);
  --bg-muted: var(--neutral-100);
  --border-subtle: var(--neutral-200);
  --border-default: var(--neutral-300);
  --text-primary: var(--neutral-1000);
  --text-secondary: var(--neutral-500);
  --text-tertiary: var(--neutral-300);
  --text-inverse: var(--neutral-0);
  --accent-default: var(--neutral-1000);
  --accent-hover: var(--neutral-800);

  /* Couleurs sémantiques */
  --signal-positive: #22C55E;
  --signal-negative: #F97316;

  /* Espacements (échelle 4pt) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* Typo */
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Container max-widths */
  --container-narrow: 640px;
  --container-default: 880px;
}

/* Dark mode (suit la préférence système) */
@media (prefers-color-scheme: dark) {
  :root {
    --neutral-0: #000000;
    --neutral-50: #09090B;
    --neutral-100: #1C1C1E;
    --neutral-200: #2C2C2E;
    --neutral-300: #3A3A3C;
    --neutral-400: #52525B;
    --neutral-500: #71717A;
    --neutral-600: #A1A1AA;
    --neutral-700: #D4D4D8;
    --neutral-800: #E4E4E7;
    --neutral-1000: #FFFFFF;

    --accent-hover: var(--neutral-700);
  }
}

/* ============================================
   Reset & base
   ============================================ */

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

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

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  font-weight: 400;
}

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

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

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

/* ============================================
   Layout & containers
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-default);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

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

/* ============================================
   Header
   ============================================ */

.site-header {
  padding: var(--space-5) 0;
  border-bottom: 1px solid transparent;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand__mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.brand__wordmark {
  line-height: 1;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background-color: var(--bg-muted);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.lang-switch button {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.8125rem;
  padding: 0 var(--space-1);
}

.lang-switch button.active {
  color: var(--text-primary);
  font-weight: 600;
}

.lang-switch__sep {
  color: var(--text-tertiary);
}

/* ============================================
   Hero
   ============================================ */

.hero {
  padding: var(--space-20) 0 var(--space-16);
  text-align: center;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  padding: var(--space-1) var(--space-3);
  background-color: var(--bg-muted);
  border-radius: var(--radius-full);
}

.hero__title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-5);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero__subtitle {
  font-size: 1.125rem;
  line-height: 1.5;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto var(--space-8);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background-color: var(--accent-default);
  color: var(--text-inverse);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background-color 0.15s ease;
}

.hero__cta:hover {
  background-color: var(--accent-hover);
}

.hero__cta-arrow {
  display: inline-block;
  transition: transform 0.15s ease;
}

.hero__cta:hover .hero__cta-arrow {
  transform: translateX(2px);
}

.hero__note {
  display: block;
  margin-top: var(--space-4);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ============================================
   Sections
   ============================================ */

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

.section--muted {
  background-color: var(--bg-surface);
}

.section__title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
  text-align: center;
}

.section__lead {
  font-size: 1rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--space-12);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Features grid
   ============================================ */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
  max-width: 880px;
  margin: 0 auto;
}

.feature {
  padding: var(--space-6);
  background-color: var(--bg-muted);
  border-radius: var(--radius-lg);
}

.feature__icon {
  width: 24px;
  height: 24px;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.feature__title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.feature__desc {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* ============================================
   Comparison / contrast block
   ============================================ */

.contrast {
  max-width: 680px;
  margin: 0 auto;
}

.contrast__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  background-color: var(--bg-muted);
  margin-bottom: var(--space-2);
}

.contrast__label {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.005em;
}

.contrast__check {
  font-size: 1.25rem;
  font-weight: 700;
}

.contrast__check--yes {
  color: var(--signal-positive);
}

.contrast__check--no {
  color: var(--signal-negative);
}

/* ============================================
   CTA section
   ============================================ */

.cta-section {
  padding: var(--space-20) 0;
  text-align: center;
}

.cta-section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-4);
}

.cta-section__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  padding: var(--space-10) 0 var(--space-8);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.site-footer__links {
  display: flex;
  gap: var(--space-6);
}

.site-footer__links a {
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.site-footer__links a:hover {
  color: var(--text-primary);
}

/* ============================================
   Generic prose (privacy page)
   ============================================ */

.prose {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: var(--space-12) var(--space-4);
}

.prose h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.prose .prose__date {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

.prose h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.prose p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.prose ul {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  padding-left: var(--space-5);
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose a {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  color: var(--text-primary);
}

.prose__back {
  display: inline-block;
  margin-bottom: var(--space-8);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ============================================
   Links page (bio link aggregator)
   ============================================ */

.links-page {
  max-width: 420px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-4);
  text-align: center;
}

.links-page__logo {
  width: 88px;
  height: 88px;
  margin: 0 auto var(--space-5);
  display: block;
}

.links-page__brand {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.links-page__tagline {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-10);
}

.links-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.links-list a {
  display: block;
  padding: var(--space-4) var(--space-5);
  background-color: var(--bg-muted);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background-color 0.15s ease;
}

.links-list a:hover {
  background-color: var(--border-subtle);
}

/* ============================================
   Visibility helpers for FR/EN content
   ============================================ */

[data-lang]:not(.active) {
  display: none;
}

/* ============================================
   Responsive tweaks
   ============================================ */

@media (max-width: 640px) {
  .hero {
    padding: var(--space-12) 0 var(--space-10);
  }

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

  .hero__cta {
    width: 100%;
    justify-content: center;
  }

  .site-footer__inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}