/* ============================================================
   SKEION — Physics-based space weather intelligence
   Design system. Vanilla CSS, no build step.
   Palette & type per SKEION charte graphique.
   ============================================================ */

:root {
  /* Aurora palette */
  --color-accent-primary: #2DDDB8;
  --color-accent-cyan: #29DDDA;
  --color-accent-blue: #37A7E7;
  --color-accent-deep: #15B89A;

  /* Backgrounds */
  --color-bg-primary: #0A081B;
  --color-bg-secondary: #091231;
  --color-bg-tertiary: rgba(9, 18, 49, 0.55);
  --color-surface: rgba(255, 255, 255, 0.02);
  --color-surface-2: rgba(9, 18, 49, 0.5);

  /* Text */
  --color-text-primary: #F0FCFF;
  --color-text-secondary: #BFC9D4;
  --color-text-muted: #7E8A9A;
  --color-white: #FFFFFF;

  /* Restrained solar-risk accent (used ONLY for risk/energy emphasis) */
  --color-risk: #5BB4EC;
  --color-risk-soft: rgba(91, 180, 236, 0.12);
  --color-risk-border: rgba(91, 180, 236, 0.32);

  /* Hairlines */
  --line: rgba(255, 255, 255, 0.08);
  --line-accent: rgba(45, 221, 184, 0.18);

  --radius-card: 20px;
  --radius-sm: 12px;
  --radius-button: 999px;

  --shadow-soft: 0 0 24px rgba(45, 221, 184, 0.10);
  --shadow-glow: 0 0 44px rgba(45, 221, 184, 0.22);
  --shadow-card: 0 18px 50px rgba(0, 0, 0, 0.45);

  --gradient-aurora: linear-gradient(135deg, #15B89A 0%, #2DDDB8 30%, #29DDDA 60%, #37A7E7 100%);
  --gradient-aurora-text: linear-gradient(90deg, #2DDDB8 0%, #29DDDA 50%, #37A7E7 100%);

  --font-heading: "Spline Sans", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Barlow", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Spline Sans Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --section-spacing: 132px;
  --container-width: 1180px;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-bg-primary);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  line-height: 1.62;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  line-height: 1.12;
  margin-top: 0;
  font-weight: 600;
  text-wrap: balance;
}

a { color: inherit; text-decoration: none; transition: color .25s ease, border-color .25s ease, background .25s ease, opacity .25s ease; }
p { margin: 0 0 1rem; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }
img { max-width: 100%; height: auto; display: block; }
::selection { background: rgba(45, 221, 184, 0.25); color: #fff; }

:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Layout ---------- */
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 28px; }
.section { padding: var(--section-spacing) 0; position: relative; overflow: hidden; }
.section-alt { background: linear-gradient(180deg, var(--color-bg-secondary), #060a1d); }
.section > .container { position: relative; z-index: 2; }
.max-w-content { max-width: 820px; }
.mx-auto { margin-inline: auto; }
.text-center { text-align: center; }

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

/* ---------- Section heading kit ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  font-size: 0.86rem;
  color: var(--color-accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: linear-gradient(90deg, var(--color-accent-primary), transparent);
}
.eyebrow.eyebrow--center::before { display: none; }

.text-gradient {
  background: var(--gradient-aurora-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.heading-xl { font-size: clamp(2.6rem, 5.4vw, 4.4rem); letter-spacing: -0.025em; margin-bottom: 24px; }
.heading-lg { font-size: clamp(2rem, 3.6vw, 3rem); letter-spacing: -0.02em; margin-bottom: 22px; }
.heading-md { font-size: clamp(1.5rem, 2.4vw, 2rem); letter-spacing: -0.01em; margin-bottom: 16px; }
.heading-sm { font-size: 1.32rem; letter-spacing: -0.01em; margin-bottom: 12px; }

.lead { font-size: clamp(1.12rem, 1.5vw, 1.3rem); color: var(--color-text-secondary); line-height: 1.55; }
.section-head { max-width: 760px; margin-bottom: 64px; }
.section-head.text-center { margin-inline: auto; }

.muted { color: var(--color-text-muted); }
.emphasis { color: var(--color-text-primary); font-weight: 500; }

/* ---------- Lists ---------- */
ul.feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
ul.feature-list li { position: relative; padding-left: 26px; color: var(--color-text-secondary); }
ul.feature-list li::before {
  content: "";
  position: absolute; left: 0; top: 0.62em;
  width: 7px; height: 7px;
  background: var(--color-accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-accent-cyan);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 28px;
  border-radius: var(--radius-button);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary {
  background: var(--color-accent-primary);
  color: #04130E;
  box-shadow: var(--shadow-soft);
}
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border-color: rgba(45, 221, 184, 0.45);
}
.btn-outline:hover { background: rgba(45, 221, 184, 0.08); border-color: var(--color-accent-primary); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--color-text-secondary); padding: 14px 0; }
.btn-ghost:hover { color: var(--color-accent-primary); }
.btn-sm { padding: 11px 20px; font-size: 0.9rem; }

.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-heading); font-weight: 600; font-size: 0.95rem;
  color: var(--color-accent-primary);
}
.link-arrow svg { width: 16px; height: 16px; transition: transform .25s ease; }
.link-arrow:hover svg { transform: translateX(4px); }

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 0;
  transition: background .3s ease, padding .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.site-nav.scrolled, .site-nav.menu-open {
  background: rgba(8, 7, 20, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-logo { display: flex; align-items: center; gap: 13px; flex-shrink: 0; }
.logo-mark { height: 46px; width: auto; transition: height .3s ease; }
.logo-word { height: 23px; width: auto; transition: height .3s ease; }
.site-nav.scrolled .logo-mark { height: 40px; }
.site-nav.scrolled .logo-word { height: 20px; }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-item {
  font-family: var(--font-heading); font-weight: 500; font-size: 0.94rem;
  color: var(--color-text-secondary); position: relative; padding: 4px 0; white-space: nowrap;
}
.nav-item::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: var(--color-accent-primary); transition: width .25s ease;
}
.nav-item:hover, .nav-item.active { color: var(--color-text-primary); }
.nav-item:hover::after, .nav-item.active::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 16px; }

/* Language toggle */
.lang-toggle {
  display: inline-flex; align-items: center;
  border: 1px solid var(--line); border-radius: var(--radius-button);
  overflow: hidden; font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 1px;
}
.lang-btn {
  background: transparent; border: none; cursor: pointer;
  color: var(--color-text-muted); padding: 6px 11px; font: inherit;
  transition: color .2s ease, background .2s ease;
}
.lang-btn.active { color: #04130E; background: var(--color-accent-primary); font-weight: 600; }

.nav-toggle {
  display: none; background: transparent; border: none; cursor: pointer;
  width: 30px; height: 22px; position: relative;
}
.nav-toggle span { display: block; width: 100%; height: 2px; background: var(--color-text-primary); position: absolute; left: 0; transition: all .3s ease; }
.nav-toggle span:nth-child(1) { top: 0; }
.nav-toggle span:nth-child(2) { top: 10px; }
.nav-toggle span:nth-child(3) { top: 20px; }
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg); top: 10px; }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg); top: 10px; }

/* ============================================================
   HERO  (3 variants switch via body[data-hero])
   ============================================================ */
.hero {
  min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center; position: relative; overflow: hidden;
  padding-top: 120px; padding-bottom: 80px;
  background:
    radial-gradient(135% 100% at 78% 6%, rgba(10,8,27,0.12), rgba(10,8,27,0.74) 52%, rgba(10,8,27,0.92)),
    linear-gradient(180deg, rgba(10,8,27,0.86), rgba(10,8,27,0.82) 55%, var(--color-bg-primary)),
    url("./assets/images/borealis.avif");
  background-size: cover; background-position: center;
}
.hero::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 160px; z-index: 1;
  background: linear-gradient(180deg, rgba(6,5,16,0.72), transparent);
  pointer-events: none;
}
#solar-canvas-container { position: absolute; inset: 0; z-index: 1; pointer-events: auto; }
#solar-canvas-container canvas { display: block; }
.hero .container { position: relative; z-index: 2; width: 100%; pointer-events: none; }
.hero-content { max-width: 660px; pointer-events: auto; }

.hero-eyebrow { margin-bottom: 24px; }
.hero h1 { margin-bottom: 26px; }
.hero .lead { font-size: clamp(1.18rem, 1.6vw, 1.4rem); margin-bottom: 24px; color: var(--color-text-secondary); }
.hero-support {
  font-size: 1.02rem; color: var(--color-text-muted);
  padding-left: 18px; border-left: 2px solid var(--line-accent);
  margin-bottom: 38px; max-width: 560px;
}
.hero-support strong { color: var(--color-text-primary); font-weight: 600; }
.hero .btn-row { margin-bottom: 52px; }

/* Trust cues */
.hero-trust { display: flex; flex-wrap: wrap; gap: 28px 40px; pointer-events: auto; }
.trust-item { max-width: 200px; }
.trust-item .trust-k { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 2px; text-transform: uppercase; color: var(--color-accent-cyan); margin-bottom: 6px; }
.trust-item .trust-v { font-size: 0.96rem; color: var(--color-text-secondary); line-height: 1.4; }

/* Variant: centered statement */
body[data-hero="centered"] .hero { text-align: center; }
body[data-hero="centered"] .hero-content { max-width: 880px; margin-inline: auto; display: flex; flex-direction: column; align-items: center; }
body[data-hero="centered"] .hero-eyebrow::before { display: none; }
body[data-hero="centered"] .hero-support { border-left: none; padding-left: 0; text-align: center; }
body[data-hero="centered"] .hero-trust { justify-content: center; }
body[data-hero="centered"] #solar-canvas-container { opacity: 0.55; }

/* Variant: split with readout panel */
body[data-hero="split"] .hero .container { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
body[data-hero="split"] .hero-content { max-width: 600px; }
body[data-hero="split"] .hero-readout { display: block; }
.hero-readout { display: none; pointer-events: auto; }

.readout-card {
  background: linear-gradient(160deg, rgba(9,18,49,0.78), rgba(8,7,20,0.7));
  border: 1px solid var(--line-accent);
  border-radius: var(--radius-card);
  padding: 26px; box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
}
.readout-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.readout-title { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--color-text-muted); }
.readout-badge {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 1px;
  padding: 5px 11px; border-radius: var(--radius-button);
  background: var(--color-risk-soft); color: var(--color-risk); border: 1px solid var(--color-risk-border);
}
.readout-row { display: flex; align-items: center; justify-content: space-between; padding: 13px 0; border-top: 1px solid var(--line); font-size: 0.92rem; }
.readout-row:first-of-type { border-top: none; }
.readout-row .rk { color: var(--color-text-muted); font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.5px; }
.readout-row .rv { color: var(--color-text-primary); font-weight: 500; }
.readout-bar { height: 5px; border-radius: 3px; background: rgba(255,255,255,0.08); overflow: hidden; margin-top: 16px; }
.readout-bar > span { display: block; height: 100%; width: 68%; background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-blue)); }

/* ============================================================
   PROBLEM
   ============================================================ */
#problem {
  background:
    linear-gradient(180deg, rgba(10,8,27,0.9), rgba(10,8,27,0.97)),
    url("./assets/images/fond-ecran2-soliel-terre.avif");
  background-size: cover; background-position: center;
}
.problem-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: start; }
.fragment-list { display: grid; gap: 0; margin-top: 8px; border-top: 1px solid var(--line); }
.fragment-list li { list-style: none; padding: 15px 0; border-bottom: 1px solid var(--line); color: var(--color-text-secondary); display: flex; gap: 14px; align-items: baseline; }
.fragment-list li .idx { font-family: var(--font-mono); font-size: 0.78rem; color: var(--color-text-muted); }
.emphasis-block {
  margin-top: 40px; padding: 26px 28px;
  border-radius: var(--radius-sm);
  background: var(--color-risk-soft);
  border: 1px solid var(--color-risk-border);
  border-left: 3px solid var(--color-risk);
}
.emphasis-block p { color: var(--color-text-primary); font-family: var(--font-heading); font-size: 1.18rem; font-weight: 500; }
.emphasis-block .tag { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 2px; text-transform: uppercase; color: var(--color-risk); display: block; margin-bottom: 10px; }

/* ============================================================
   PIPELINE
   ============================================================ */
.pipeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin-top: 12px; position: relative; }
.pipe-step { position: relative; padding: 0 18px; }
.pipe-step:not(:last-child)::after {
  content: ""; position: absolute; top: 27px; right: -1px; width: 2px; /* placeholder */
}
.pipe-node {
  width: 54px; height: 54px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(45,221,184,0.06); border: 1px solid var(--line-accent);
  color: var(--color-accent-primary); margin-bottom: 20px;
}
.pipe-node svg { width: 24px; height: 24px; }
.pipe-step .pipe-n { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 1.5px; color: var(--color-text-muted); margin-bottom: 8px; }
.pipe-step h4 { font-size: 1.05rem; margin-bottom: 8px; }
.pipe-step p { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.5; }
.pipe-connect {
  display: grid; grid-template-columns: repeat(5, 1fr);
  margin: 30px 0 6px; align-items: center;
}
.pipe-line { height: 1px; background: linear-gradient(90deg, var(--line-accent), var(--color-accent-cyan), var(--line-accent)); position: relative; }

/* ============================================================
   STAT / CREDIBILITY BAND
   ============================================================ */
.stat-section { padding-top: 92px; padding-bottom: 92px; border-top: 1px solid var(--line); position: relative; }
.stat-section .container { position: relative; z-index: 2; }
.magnetic-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  z-index: 1; pointer-events: none; opacity: 0.5;
}
.stat-band {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0; border: 1px solid var(--line); border-radius: var(--radius-card);
  background: var(--color-surface); overflow: hidden;
}
.stat-item {
  padding: 40px 36px; text-align: center;
  border-left: 1px solid var(--line);
}
.stat-item:first-child { border-left: none; }
.stat-n {
  font-family: var(--font-heading); font-weight: 600; line-height: 1;
  font-size: clamp(2.8rem, 5vw, 4rem); letter-spacing: -0.03em;
  background: var(--gradient-aurora-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  margin-bottom: 16px;
}
.stat-n .stat-plus { font-size: 0.6em; vertical-align: 0.12em; margin-left: 2px; }
.stat-l {
  color: var(--color-text-secondary); font-size: 0.98rem; line-height: 1.45;
  max-width: 230px; margin: 0 auto;
}
.stat-l em { color: var(--color-text-primary); font-style: italic; }
.stat-foot {
  text-align: center; color: var(--color-text-muted);
  max-width: 720px; margin: 34px auto 0; font-size: 1rem; line-height: 1.55;
}

/* ============================================================
   PRODUCTS
   ============================================================ */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  position: relative;
  background: linear-gradient(180deg, rgba(9,18,49,0.5), rgba(9,18,49,0.22));
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 34px 30px 30px;
  display: flex; flex-direction: column;
  transition: transform .3s ease, border-color .3s ease, background .3s ease;
  overflow: hidden;
}
.product-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--accent, var(--color-accent-primary)); opacity: 0.7;
}
.product-card:hover { transform: translateY(-6px); border-color: var(--line-accent); background: linear-gradient(180deg, rgba(9,18,49,0.66), rgba(9,18,49,0.3)); }
.product-index { font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 2px; color: var(--color-text-muted); margin-bottom: 18px; display: block; }
.product-card h3 { font-size: 1.42rem; margin-bottom: 6px; }
.product-card .product-sub { color: var(--accent, var(--color-accent-primary)); font-size: 0.96rem; font-weight: 500; margin-bottom: 18px; }
.product-card > p { color: var(--color-text-secondary); font-size: 1.06rem; line-height: 1.6; margin-bottom: 24px; }
.product-card .feature-list { margin-bottom: 28px; }
.product-card .feature-list li { font-size: 0.96rem; }
.product-card .feature-list li::before { background: var(--accent, var(--color-accent-cyan)); box-shadow: 0 0 10px var(--accent, var(--color-accent-cyan)); }
.product-card .card-foot { margin-top: auto; }

/* ============================================================
   USE CASES
   ============================================================ */
.usecase-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.usecase-card {
  border: 1px solid var(--line); border-radius: var(--radius-card);
  overflow: hidden; background: var(--color-surface-2);
  display: flex; flex-direction: column;
  transition: transform .3s ease, border-color .3s ease;
}
.usecase-card:hover { transform: translateY(-4px); border-color: var(--line-accent); }
.usecase-media { position: relative; aspect-ratio: 16 / 7; overflow: hidden; background: #060a1d; }
.usecase-media img { width: 100%; height: 100%; object-fit: cover; opacity: 0.85; transition: transform .5s ease; }
.usecase-card:hover .usecase-media img { transform: scale(1.05); }
.usecase-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,8,27,0.1), rgba(9,18,49,0.7)); }
.usecase-tag {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 1.5px; text-transform: uppercase;
  padding: 5px 11px; border-radius: var(--radius-button);
  background: rgba(8,7,20,0.7); color: var(--color-accent-cyan); border: 1px solid var(--line-accent);
  backdrop-filter: blur(6px);
}
.usecase-credit {
  position: absolute; bottom: 12px; right: 14px; z-index: 2;
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 1px;
  color: var(--color-text-secondary); opacity: 0.75;
  background: rgba(8,7,20,0.55); padding: 3px 8px; border-radius: 6px;
  backdrop-filter: blur(4px);
}
.usecase-body { padding: 28px 28px 30px; display: flex; flex-direction: column; flex: 1; }
.usecase-body h3 { font-size: 1.22rem; margin-bottom: 12px; }
.usecase-body p { font-size: 0.96rem; color: var(--color-text-secondary); margin-bottom: 20px; }
.usecase-body .card-foot { margin-top: auto; }

/* Image placeholder (striped) */
.img-placeholder {
  position: relative; width: 100%; height: 100%;
  background:
    repeating-linear-gradient(135deg, rgba(55,167,231,0.07) 0 12px, rgba(55,167,231,0.02) 12px 24px),
    #070c1f;
  display: flex; align-items: center; justify-content: center;
}
.img-placeholder span {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 1px; text-transform: uppercase;
  color: var(--color-text-muted); border: 1px dashed rgba(127,138,154,0.35); padding: 7px 13px; border-radius: 6px;
}

/* ============================================================
   SCIENCE
   ============================================================ */
.science-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: center; }
.nature-covers { position: relative; width: 100%; max-width: 380px; aspect-ratio: 3/4; margin: 0 auto; }
.nature-cover {
  position: absolute; width: 74%; border-radius: 10px; box-shadow: var(--shadow-card);
  border: 1px solid var(--line-accent);
  transition: transform .45s cubic-bezier(.2,.8,.2,1), box-shadow .45s ease;
}
.cover-back { top: 0; left: 0; animation: coverCycleBack 9s ease-in-out infinite; }
.cover-front { bottom: 0; right: 0; animation: coverCycleFront 9s ease-in-out infinite; }
.nature-covers:hover .cover-back, .nature-covers:hover .cover-front { animation-play-state: paused; }
@keyframes coverCycleFront {
  0%, 38% { transform: rotate(6deg) translate(0, 0) scale(1); z-index: 3; box-shadow: var(--shadow-glow); }
  50%, 88% { transform: rotate(3deg) translate(-11%, 7%) scale(0.93); z-index: 1; box-shadow: var(--shadow-card); }
  100% { transform: rotate(6deg) translate(0, 0) scale(1); z-index: 3; box-shadow: var(--shadow-glow); }
}
@keyframes coverCycleBack {
  0%, 38% { transform: rotate(-6deg) translate(0, 0) scale(0.93); z-index: 1; box-shadow: var(--shadow-card); }
  50%, 88% { transform: rotate(-3deg) translate(11%, -7%) scale(1); z-index: 3; box-shadow: var(--shadow-glow); }
  100% { transform: rotate(-6deg) translate(0, 0) scale(0.93); z-index: 1; box-shadow: var(--shadow-card); }
}
.cover-caption { position: absolute; bottom: -34px; left: 0; right: 0; text-align: center; font-family: var(--font-mono); font-size: 0.74rem; color: var(--color-text-muted); letter-spacing: 1px; }
.trust-line {
  margin-top: 30px; padding: 22px 26px; border-radius: var(--radius-sm);
  background: rgba(45,221,184,0.05); border: 1px solid var(--line-accent);
}
.trust-line p { color: var(--color-text-primary); font-family: var(--font-heading); font-size: 1.08rem; font-weight: 500; }

/* ============================================================
   WHY SKEION (pillars)
   ============================================================ */
.pillar-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.pillar {
  padding: 30px 26px; border: 1px solid var(--line); border-radius: var(--radius-card);
  background: var(--color-surface); transition: border-color .3s ease, transform .3s ease;
}
.pillar:hover { border-color: var(--line-accent); transform: translateY(-4px); }
.pillar .pillar-num { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 1.5px; color: var(--color-accent-cyan); margin-bottom: 18px; display: block; }
.pillar h3 { font-size: 1.18rem; margin-bottom: 10px; }
.pillar p { font-size: 0.92rem; color: var(--color-text-muted); }

/* ============================================================
   FINAL CTA
   ============================================================ */
.cta-band {
  position: relative; text-align: center;
  background:
    linear-gradient(180deg, rgba(10,8,27,0.55), rgba(10,8,27,0.88)),
    url("./assets/images/infrastructures-critiques.avif");
  background-size: cover; background-position: center;
}
.cta-band .btn-row { justify-content: center; }

/* ============================================================
   CONTACT
   ============================================================ */
#contact { background: linear-gradient(180deg, #060a1d, var(--color-bg-primary)); }
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 56px; align-items: start; }
.contact-note { font-size: 0.96rem; color: var(--color-text-muted); margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
.contact-form {
  background: var(--color-surface-2); padding: 36px;
  border-radius: var(--radius-card); border: 1px solid var(--line);
}
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 1px; text-transform: uppercase; color: var(--color-text-muted); margin-bottom: 9px; }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; background: rgba(10,8,27,0.6);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 14px 15px; color: var(--color-white);
  font-family: var(--font-body); font-size: 1rem; transition: all .25s ease;
}
.contact-form select { appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%237E8A9A' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 15px center; padding-right: 40px;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus {
  outline: none; border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(45,221,184,0.12); background: rgba(10,8,27,0.92);
}
.contact-form input::placeholder, .contact-form textarea::placeholder { color: rgba(255,255,255,0.22); }
.contact-form textarea { resize: vertical; min-height: 120px; }
.form-reassure {
  display: flex; align-items: flex-start; gap: 10px;
  margin: 16px 0 0; font-size: 0.84rem; line-height: 1.45;
  color: var(--color-text-muted);
}
.form-reassure svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 2px; color: var(--color-accent-primary); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: #05040e; padding: 84px 0 36px; border-top: 1px solid var(--line); }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 56px; }
.footer-brand img { height: 70px; width: auto; margin-bottom: 22px; }
.footer-brand p { max-width: 300px; font-size: 0.95rem; color: var(--color-text-muted); }
.footer-cred {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.5px;
  color: var(--color-text-secondary); margin-top: 16px !important;
}
.footer-col h4 { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--color-text-secondary); margin-bottom: 18px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 11px; }
.footer-col a { color: var(--color-text-muted); font-size: 0.94rem; }
.footer-col a:hover { color: var(--color-accent-primary); }
.footer-bottom {
  border-top: 1px solid var(--line); padding-top: 28px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  font-size: 0.88rem; color: var(--color-text-muted);
}
.footer-bottom a { color: var(--color-text-muted); }
.footer-bottom a:hover { color: var(--color-accent-primary); }

/* ============================================================
   CONTACT FAB (floating shortcut to the contact form)
   ============================================================ */
.contact-fab {
  position: fixed; right: 22px; bottom: 22px; z-index: 200;
  display: inline-flex; align-items: center;
  height: 56px; border-radius: 999px;
  background: var(--color-accent-primary); color: #04130E;
  box-shadow: 0 10px 30px rgba(45,221,184,0.32), var(--shadow-card);
  overflow: hidden;
  transition: box-shadow .3s ease, transform .3s ease;
}
.contact-fab__icon { width: 56px; height: 56px; display: grid; place-items: center; flex-shrink: 0; }
.contact-fab__icon svg { width: 23px; height: 23px; }
.contact-fab__label {
  font-family: var(--font-heading); font-weight: 600; font-size: 0.95rem; white-space: nowrap;
  max-width: 0; opacity: 0;
  transition: max-width .38s cubic-bezier(.22,.61,.36,1), opacity .25s ease, padding .38s ease;
}
.contact-fab:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(45,221,184,0.46), var(--shadow-card); }
.contact-fab:hover .contact-fab__label { max-width: 200px; opacity: 1; padding-right: 24px; }
.contact-fab::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  animation: fabPulse 3.6s ease-out infinite;
}
@keyframes fabPulse {
  0% { box-shadow: 0 0 0 0 rgba(45,221,184,0.45); }
  70%, 100% { box-shadow: 0 0 0 18px rgba(45,221,184,0); }
}
@media (max-width: 560px) { .contact-fab { right: 16px; bottom: 16px; } }

/* ============================================================
   ANIMATIONS — scroll reveal + entrances (motion-safe only)
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(26px); transition: opacity .75s cubic-bezier(.22,.61,.36,1), transform .75s cubic-bezier(.22,.61,.36,1); }
  .reveal.in-view { opacity: 1; transform: none; }

  .reveal-line { transform: scaleX(0); transform-origin: left center; transition: transform .9s cubic-bezier(.22,.61,.36,1); }
  .reveal-line.in-view { transform: scaleX(1); }

  .hero-content > * { animation: heroIn .85s cubic-bezier(.22,.61,.36,1) both; }
  .hero-content > *:nth-child(1) { animation-delay: .06s; }
  .hero-content > *:nth-child(2) { animation-delay: .15s; }
  .hero-content > *:nth-child(3) { animation-delay: .24s; }
  .hero-content > *:nth-child(4) { animation-delay: .33s; }
  .hero-content > *:nth-child(5) { animation-delay: .42s; }
  .hero-content > *:nth-child(6) { animation-delay: .51s; }
  @keyframes heroIn { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1040px) {
  .nav-links, .nav-actions .lang-toggle { gap: 22px; }
  .nav-container { gap: 16px; }
  .nav-logo { margin-right: auto; }
  .nav-actions { order: 1; }
  .nav-toggle { order: 2; display: block; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(8,7,20,0.98); backdrop-filter: blur(14px);
    flex-direction: column; align-items: flex-start; gap: 22px;
    padding: 28px; border-bottom: 1px solid var(--line);
    opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all .3s ease;
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: translateY(0); }
}

@media (max-width: 1024px) {
  :root { --section-spacing: 100px; }
  .product-grid { grid-template-columns: 1fr; max-width: 520px; margin-inline: auto; }
  .pillar-grid { grid-template-columns: repeat(2, 1fr); }
  body[data-hero="split"] .hero .container { grid-template-columns: 1fr; }
  body[data-hero="split"] .hero-readout { max-width: 480px; margin-top: 36px; }
}

@media (max-width: 900px) {
  .problem-grid, .science-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .usecase-grid { grid-template-columns: 1fr; max-width: 520px; margin-inline: auto; }
  .pipeline { grid-template-columns: 1fr 1fr; gap: 28px 18px; }
  .pipe-connect { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer-brand { grid-column: 1 / -1; }
  .stat-band { grid-template-columns: 1fr; }
  .stat-item { border-left: none; border-top: 1px solid var(--line); padding: 30px 24px; }
  .stat-item:first-child { border-top: none; }
}

@media (max-width: 768px) {
  .nav-actions .btn { display: none; }
}

@media (max-width: 560px) {
  body { font-size: 17px; }
  :root { --section-spacing: 76px; }
  .container { padding: 0 20px; }
  .hero { padding-top: 104px; }
  .hero-trust { gap: 22px 28px; }
  .pipeline { grid-template-columns: 1fr; }
  .pillar-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .contact-form { padding: 26px 22px; }
  .btn { width: 100%; }
  .hero .btn-row .btn, .cta-band .btn { width: auto; }
  .logo-word { display: none; }
  .nav-logo { gap: 0; }
}

/* ============================================================
   SUBPAGES (aiXplore / Use Cases / EU Space Act)
   ============================================================ */
.page-hero {
  position: relative; overflow: hidden;
  padding: 184px 0 96px;
  background:
    radial-gradient(120% 120% at 80% 0%, rgba(45,221,184,0.10), transparent 55%),
    linear-gradient(180deg, rgba(10,8,27,0.78), rgba(10,8,27,0.92) 62%, var(--color-bg-primary)),
    url("./assets/images/borealis.avif");
  background-size: cover; background-position: center;
}
.page-hero::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-accent), transparent);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero-inner { max-width: 820px; }
.page-hero h1 { margin-bottom: 22px; }
.page-hero .lead { margin-bottom: 34px; max-width: 720px; }
.page-hero .btn-row { margin-top: 4px; }

.breadcrumb { display: flex; align-items: center; gap: 9px; font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 1px; color: var(--color-text-muted); margin-bottom: 26px; }
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-accent-primary); }
.breadcrumb svg { width: 13px; height: 13px; opacity: 0.6; }

/* Note / disclaimer block */
.note-block {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 22px 26px; border-radius: var(--radius-sm);
  background: rgba(55,167,231,0.06); border: 1px solid rgba(55,167,231,0.22);
  max-width: 760px;
}
.note-block svg { width: 22px; height: 22px; color: var(--color-accent-blue); flex-shrink: 0; margin-top: 2px; }
.note-block p { font-size: 0.96rem; color: var(--color-text-secondary); }
.note-block strong { color: var(--color-text-primary); }
.page-hero .note-block { margin-top: 34px; }

/* Capability cards (richer than pillars) */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cap-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cap-card {
  padding: 32px 28px; border: 1px solid var(--line); border-radius: var(--radius-card);
  background: linear-gradient(180deg, rgba(9,18,49,0.42), rgba(9,18,49,0.18));
  transition: border-color .3s ease, transform .3s ease;
}
.cap-card:hover { border-color: var(--line-accent); transform: translateY(-5px); }
.cap-ico {
  width: 50px; height: 50px; border-radius: 13px; margin-bottom: 22px;
  display: grid; place-items: center;
  background: rgba(45,221,184,0.07); border: 1px solid var(--line-accent); color: var(--color-accent-primary);
}
.cap-ico svg { width: 23px; height: 23px; }
.cap-card h3 { font-size: 1.18rem; margin-bottom: 10px; }
.cap-card p { font-size: 0.96rem; color: var(--color-text-secondary); }

/* Alternating feature rows (use cases) */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.feature-row + .feature-row { margin-top: 110px; }
.feature-row:nth-child(even) .feature-row__media { order: 2; }
.feature-row__media {
  position: relative; border-radius: var(--radius-card); overflow: hidden;
  aspect-ratio: 4 / 3; border: 1px solid var(--line); background: #060a1d;
}
.feature-row__media img { width: 100%; height: 100%; object-fit: cover; }
.feature-row__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,8,27,0.05), rgba(9,18,49,0.45)); }
.feature-row__tag {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 1.5px; text-transform: uppercase;
  padding: 6px 12px; border-radius: var(--radius-button);
  background: rgba(8,7,20,0.72); color: var(--color-accent-cyan); border: 1px solid var(--line-accent);
  backdrop-filter: blur(6px);
}
/* Variant: pin the tag to the bottom-right corner (keeps top-left of the shot visible) */
.feature-row__tag--br { top: auto; left: auto; bottom: 16px; right: 16px; }
/* aiXplore hero brand lockup */
.aix-hero-logo { height: 104px; width: auto; margin: 0 0 26px; display: block; filter: drop-shadow(0 6px 24px rgba(55,167,231,0.28)); }
@media (max-width: 560px) { .aix-hero-logo { height: 80px; margin-bottom: 20px; } }
.feature-row__body .uc-headline { font-size: clamp(1.4rem, 2.2vw, 1.85rem); margin-bottom: 18px; }
.uc-meta { margin: 22px 0; display: grid; gap: 16px; }
.uc-meta .uc-pain, .uc-meta .uc-value { padding-left: 16px; border-left: 2px solid var(--line); }
.uc-meta .uc-value { border-left-color: var(--color-accent-primary); }
.uc-meta .uc-k { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--color-text-muted); display: block; margin-bottom: 7px; }
.uc-meta .uc-value .uc-k { color: var(--color-accent-primary); }
.uc-meta p { font-size: 0.98rem; color: var(--color-text-secondary); }
.uc-outputs { display: flex; flex-wrap: wrap; gap: 9px; margin: 22px 0 26px; }
.uc-chip {
  font-size: 0.84rem; font-family: var(--font-mono); letter-spacing: 0.3px; white-space: nowrap;
  padding: 7px 13px; border-radius: var(--radius-button);
  background: rgba(255,255,255,0.03); border: 1px solid var(--line); color: var(--color-text-secondary);
}
.uc-airbus {
  margin: 24px 0 26px; padding: 20px 24px; border-radius: var(--radius-sm);
  background: rgba(45,221,184,0.05); border: 1px solid var(--line-accent);
}
.uc-airbus .uc-k { color: var(--color-accent-cyan); }
.uc-airbus p { font-size: 0.96rem; color: var(--color-text-primary); }

/* Numbered flow steps */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: flow; }
.flow.cols-4 { grid-template-columns: repeat(4, 1fr); }
.flow-step { padding: 26px 22px; border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--color-surface); position: relative; }
.flow-step::before {
  counter-increment: flow; content: counter(flow, decimal-leading-zero);
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-accent-primary);
  display: block; margin-bottom: 14px; letter-spacing: 1px;
}
.flow-step h4 { font-size: 1.08rem; margin-bottom: 8px; }
.flow-step p { font-size: 0.9rem; color: var(--color-text-muted); }

/* Module cards (resilience / EU Space Act) */
.module-card {
  display: grid; grid-template-columns: auto 1fr; gap: 22px; align-items: start;
  padding: 28px 30px; border: 1px solid var(--line); border-radius: var(--radius-card);
  background: linear-gradient(180deg, rgba(9,18,49,0.4), rgba(9,18,49,0.16));
  transition: border-color .3s ease;
}
.module-card + .module-card { margin-top: 16px; }
.module-card:hover { border-color: var(--line-accent); }
.module-card .cap-ico { margin-bottom: 0; }
.module-card h3 { font-size: 1.2rem; margin-bottom: 9px; }
.module-card p { font-size: 0.98rem; color: var(--color-text-secondary); }
.module-card .module-note { margin-top: 12px; font-size: 0.88rem; color: var(--color-text-muted); font-style: italic; }

/* Boundaries (what SKEION does not do) */
.boundary-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 28px; }
.boundary-grid li {
  list-style: none; display: flex; gap: 13px; align-items: flex-start;
  padding: 15px 0; border-bottom: 1px solid var(--line); color: var(--color-text-secondary); font-size: 0.98rem;
}
.boundary-grid li svg { width: 19px; height: 19px; color: var(--color-text-muted); flex-shrink: 0; margin-top: 2px; }

/* Audience / persona cards */
.persona-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.persona {
  padding: 28px 28px; border: 1px solid var(--line); border-radius: var(--radius-card);
  background: var(--color-surface); display: flex; gap: 18px; align-items: flex-start;
  transition: border-color .3s ease, transform .3s ease;
}
.persona:hover { border-color: var(--line-accent); transform: translateY(-4px); }
.persona .cap-ico { margin-bottom: 0; }
.persona h3 { font-size: 1.12rem; margin-bottom: 8px; }
.persona p { font-size: 0.94rem; color: var(--color-text-muted); }

@media (max-width: 1024px) {
  .cap-grid, .cap-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .flow, .flow.cols-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .feature-row { grid-template-columns: 1fr; gap: 32px; }
  .feature-row:nth-child(even) .feature-row__media { order: 0; }
  .feature-row + .feature-row { margin-top: 72px; }
  .persona-grid { grid-template-columns: 1fr; }
  .boundary-grid { grid-template-columns: 1fr; gap: 0; }
}
@media (max-width: 620px) {
  .cap-grid, .cap-grid.cols-2, .flow, .flow.cols-4 { grid-template-columns: 1fr; }
  .page-hero { padding-top: 150px; }
  .module-card { grid-template-columns: 1fr; gap: 16px; }
}

/* Reduce motion: disable transforms/animation niceties */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}