/* ============================================================
   Surcouf — Design system
   Inspiration : The Black Room (dark premium, éditorial)
   ============================================================ */

/* ----- Tokens ----- */
:root {
  /* Surfaces */
  --color-bg: oklch(11% 0.005 250);
  --color-bg-elevated: oklch(15% 0.008 250);
  --color-surface: oklch(17% 0.01 250);
  --color-surface-hover: oklch(21% 0.012 250);
  --color-border: oklch(28% 0.015 250 / 0.6);
  --color-border-strong: oklch(40% 0.02 250 / 0.8);

  /* Text */
  --color-text: oklch(96% 0.005 250);
  --color-text-muted: oklch(68% 0.01 250);
  --color-text-dim: oklch(48% 0.008 250);

  /* Accent — bleu électrique */
  --color-accent: oklch(74% 0.18 230);
  --color-accent-strong: oklch(80% 0.2 230);
  --color-accent-soft: oklch(74% 0.18 230 / 0.12);

  /* Sémantique */
  --color-live: oklch(72% 0.17 155);
  --color-live-soft: oklch(72% 0.17 155 / 0.12);
  --color-stub: oklch(62% 0.008 250);
  --color-stub-soft: oklch(62% 0.008 250 / 0.1);

  /* Typographie */
  --font-sans: "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, sans-serif;
  --font-display: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont,
    sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  --text-3xl: clamp(2rem, 1.4rem + 2vw, 2.75rem);
  --text-hero: clamp(2.75rem, 1.6rem + 5vw, 5.5rem);

  /* Espacement */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-section: clamp(4rem, 3rem + 5vw, 8rem);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* Motion */
  --duration-fast: 150ms;
  --duration-normal: 280ms;
  --duration-slow: 500ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);

  /* Layout */
  --container-max: 1280px;
  --container-pad: clamp(1.25rem, 0.8rem + 2vw, 2.5rem);

  /* Shadows */
  --shadow-card: 0 1px 0 oklch(100% 0 0 / 0.03) inset,
    0 12px 32px -16px oklch(0% 0 0 / 0.6);
  --shadow-card-hover: 0 1px 0 oklch(100% 0 0 / 0.05) inset,
    0 24px 60px -20px oklch(0% 0 0 / 0.7);
}

/* ----- Reset léger ----- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.55;
  min-height: 100vh;
  background-image: radial-gradient(
      1200px 600px at 80% -20%,
      oklch(74% 0.18 230 / 0.07),
      transparent 60%
    ),
    radial-gradient(
      900px 500px at 0% 110%,
      oklch(74% 0.18 230 / 0.05),
      transparent 60%
    );
  background-attachment: fixed;
}

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

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

/* ----- Container ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ----- Header / Nav ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  background: oklch(11% 0.005 250 / 0.65);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}

.brand__mark {
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--color-text);
}

.brand__sub {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-dim);
}

.nav__links {
  display: flex;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-sm);
}

.nav__links a {
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out-quart);
}

.nav__links a:hover,
.nav__links a[aria-current="page"] {
  color: var(--color-text);
}

/* ----- Submenu (dropdown nav) ----- */
.has-submenu {
  position: relative;
}

.nav__caret {
  display: inline-block;
  font-size: 9px;
  margin-left: 2px;
  transition: transform var(--duration-fast) var(--ease-out-quart);
}

.has-submenu:hover .nav__caret,
.has-submenu:focus-within .nav__caret {
  transform: rotate(180deg);
}

.submenu {
  position: absolute;
  top: calc(100% + 8px);
  left: -8px;
  margin: 0;
  padding: 6px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 140px;
  background: oklch(15% 0.01 250 / 0.96);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  backdrop-filter: blur(10px);
  box-shadow: 0 14px 32px -10px oklch(0% 0 0 / 0.6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--duration-fast) var(--ease-out-quart),
    transform var(--duration-fast) var(--ease-out-quart),
    visibility 0s linear var(--duration-fast);
  z-index: 60;
}

.has-submenu:hover .submenu,
.has-submenu:focus-within .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s;
}

.submenu a {
  display: block;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
}

.submenu a:hover,
.submenu a[aria-current="page"] {
  background: var(--color-surface-hover);
}

/* ----- Typo / utilitaires ----- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-dim);
  font-weight: 500;
}

.eyebrow::before {
  content: "";
  inline-size: 24px;
  block-size: 1px;
  background: var(--color-text-dim);
  display: inline-block;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 0;
  line-height: 1.05;
}

p {
  margin: 0;
}

/* ----- Hero ----- */
.hero {
  padding-block: clamp(4rem, 2rem + 8vw, 8rem) var(--space-section);
  position: relative;
}

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

.hero__title {
  font-size: var(--text-hero);
  max-width: 18ch;
  line-height: 0.98;
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__lede {
  margin-top: var(--space-5);
  max-width: 56ch;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  line-height: 1.55;
}

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

/* ----- Boutons ----- */
.btn {
  --btn-bg: var(--color-text);
  --btn-fg: var(--color-bg);
  --btn-border: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-border);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
  font: inherit;
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out-quart),
    background var(--duration-fast) var(--ease-out-quart),
    color var(--duration-fast) var(--ease-out-quart);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--color-text);
  --btn-border: var(--color-border-strong);
}

.btn--ghost:hover {
  --btn-bg: var(--color-surface-hover);
  --btn-border: var(--color-accent);
}

.btn--accent {
  --btn-bg: var(--color-accent);
  --btn-fg: oklch(15% 0.02 250);
  --btn-border: var(--color-accent);
}

.btn--accent:hover {
  --btn-bg: var(--color-accent-strong);
  --btn-border: var(--color-accent-strong);
}

/* ----- Section ----- */
.section {
  padding-block: var(--space-section);
}

.section__head {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-7);
  max-width: 60ch;
}

.section__title {
  font-size: var(--text-3xl);
}

.section__lede {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

/* ----- Grille modules ----- */
.modules {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(12, 1fr);
}

.module {
  grid-column: span 12;
  position: relative;
  background: linear-gradient(
    180deg,
    var(--color-surface) 0%,
    var(--color-bg-elevated) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out-expo),
    border-color var(--duration-normal) var(--ease-out-quart),
    box-shadow var(--duration-normal) var(--ease-out-quart);
}

.module::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    400px 200px at var(--mx, 50%) var(--my, 0%),
    oklch(74% 0.18 230 / 0.08),
    transparent 60%
  );
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out-quart);
}

.module:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card-hover);
}

.module:hover::after {
  opacity: 1;
}

.module--live {
  border-color: oklch(74% 0.18 230 / 0.4);
}

.module--live:hover {
  border-color: var(--color-accent);
}

@media (min-width: 720px) {
  .module {
    grid-column: span 6;
  }
}

@media (min-width: 1080px) {
  .module {
    grid-column: span 6;
    min-height: 320px;
  }
  .module--featured {
    grid-column: span 12;
    min-height: 360px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-7);
    align-items: center;
  }
}

.module__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.module__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-dim);
  letter-spacing: 0.08em;
}

.module__title {
  font-size: var(--text-2xl);
  margin-top: var(--space-2);
}

.module__tagline {
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.module__desc {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 52ch;
}

.module__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: auto;
}

/* Badge statut */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-full);
  font-weight: 500;
}

.badge--live {
  background: var(--color-live-soft);
  color: var(--color-live);
}

.badge--stub {
  background: var(--color-stub-soft);
  color: var(--color-stub);
}

.badge__dot {
  inline-size: 6px;
  block-size: 6px;
  border-radius: var(--radius-full);
  background: currentColor;
}

.badge--live .badge__dot {
  box-shadow: 0 0 0 4px oklch(72% 0.17 155 / 0.18);
  animation: pulse 2.4s var(--ease-out-quart) infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 oklch(72% 0.17 155 / 0.35);
  }
  50% {
    box-shadow: 0 0 0 6px oklch(72% 0.17 155 / 0);
  }
}

/* Arrow CTA */
.module__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.module__cta .arrow {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-out-quart);
}

.module:hover .module__cta .arrow {
  transform: translateX(4px);
}

.module--stub .module__cta {
  color: var(--color-text-dim);
}

/* ----- Pipeline visualisation ----- */
.pipeline {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.pipeline__title {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-dim);
  font-weight: 500;
}

.pipeline__steps {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: pipeline;
}

.pipeline__steps li {
  counter-increment: pipeline;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: baseline;
  padding-block: var(--space-2);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.pipeline__steps li:first-child {
  border-top: 0;
  padding-top: 0;
}

.pipeline__steps li::before {
  content: counter(pipeline, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

/* ----- Stub page ----- */
.stub {
  padding-block: var(--space-section);
}

.stub__title {
  font-size: var(--text-3xl);
  max-width: 18ch;
}

.stub__tagline {
  color: var(--color-accent);
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.stub__body {
  margin-top: var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  max-width: 62ch;
}

.stub__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-7);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

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

/* ----- Footer ----- */
.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-section);
  padding-block: var(--space-6);
  color: var(--color-text-dim);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

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

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