/* ==========================================================================
   Viael Solutions — design system
   Palette "copper/sand", typo Fraunces (titres) + Inter (texte)
   ========================================================================== */

:root {
  --bg-0: #0d0d0d;
  --bg-1: #161513;
  --bg-2: #1f1d1a;
  --bg-3: #2a2723;
  --line: rgba(212, 165, 116, 0.16);
  --line-strong: rgba(212, 165, 116, 0.32);
  --copper: #d4a574;
  --copper-bright: #e8c49a;
  --copper-deep: #c19050;
  --copper-glow: rgba(212, 165, 116, 0.18);
  --ink-0: #f5f0eb;
  --ink-1: #c8bdaf;
  --ink-2: #8c8174;
  --ink-3: #5a5246;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --r-card: 16px;
  --r-btn: 12px;
  --r-modal: 24px;
  --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-2: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 0 1px var(--line-strong), 0 12px 40px rgba(212, 165, 116, 0.08);
  --ambient: rgba(212, 165, 116, 0.08);
  --wrap: 1180px;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg-0: #faf6f1;
  --bg-1: #f3ece2;
  --bg-2: #ebe2d4;
  --bg-3: #e0d4c1;
  --line: rgba(140, 95, 50, 0.18);
  --line-strong: rgba(140, 95, 50, 0.34);
  --copper: #b07a3d;
  --copper-bright: #c89055;
  --copper-deep: #8e5e2a;
  --copper-glow: rgba(140, 95, 50, 0.14);
  --ink-0: #1c1612;
  --ink-1: #4a3e30;
  --ink-2: #7a6a55;
  --ink-3: #a89880;
  --shadow-1: 0 1px 3px rgba(80, 50, 20, 0.08);
  --shadow-2: 0 8px 32px rgba(80, 50, 20, 0.10);
  --shadow-glow: 0 0 0 1px var(--line-strong), 0 12px 40px rgba(176, 122, 61, 0.12);
  --ambient: rgba(176, 122, 61, 0.10);
  color-scheme: light;
}
[data-theme="light"] .btn-primary { color: #fff8ee; }
[data-theme="light"] .nav { background: rgba(250, 246, 241, 0.72); }
[data-theme="light"] .nav.scrolled { background: rgba(250, 246, 241, 0.92); }
[data-theme="light"] ::selection { background: var(--copper); color: #fff8ee; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  background: var(--bg-0);
  color: var(--ink-0);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background 220ms ease, color 220ms ease;
}
body::after {
  content: "";
  position: fixed;
  top: -20%;
  left: 50%;
  width: 80vw;
  height: 60vh;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, var(--ambient), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
::selection { background: var(--copper-deep); color: #fff8ee; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font: inherit; cursor: pointer; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; line-height: 1.12; margin: 0; color: var(--ink-0); }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; font-weight: 600; }
p { margin: 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 16px; height: 1px; background: var(--copper); }

.sub { color: var(--ink-1); font-size: 1.05rem; max-width: 60ch; }

/* ---- buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--r-btn);
  padding: 12px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
  white-space: nowrap;
}
.btn-primary { background: linear-gradient(135deg, var(--copper-bright), var(--copper-deep)); color: #1a1410; box-shadow: var(--shadow-1); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn-outline { background: transparent; border-color: var(--line-strong); color: var(--ink-0); }
.btn-outline:hover { border-color: var(--copper); background: var(--copper-glow); }
.btn-ghost { background: var(--bg-2); color: var(--ink-1); }
.btn-ghost:hover { color: var(--ink-0); }
.btn-sm { padding: 9px 16px; font-size: 0.84rem; }
.btn-block { width: 100%; justify-content: center; }
.btn-icon { padding: 9px; border-radius: 10px; background: var(--bg-2); color: var(--ink-1); border: 1px solid var(--line); }
.btn-icon:hover { color: var(--copper); border-color: var(--line-strong); }

/* ---- nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(13, 13, 13, 0.7);
  border-bottom: 1px solid transparent;
  transition: background 200ms ease, border-color 200ms ease;
}
.nav.scrolled { background: rgba(13, 13, 13, 0.9); border-color: var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  flex: none;
}
.brand-mark svg { width: 100%; height: 100%; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--serif); font-weight: 600; font-size: 1.05rem; color: var(--ink-0); }
.brand-tag { font-size: 0.72rem; color: var(--ink-2); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 0.9rem; color: var(--ink-1); transition: color 160ms ease; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--copper); }
.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-cta .btn-outline { display: none; }
  .nav-toggle { display: inline-flex; }
}

/* mobile menu */
.mobile-menu {
  display: none;
  position: fixed; inset: 0; z-index: 60;
  background: var(--bg-0);
  padding: 20px 24px;
  overflow-y: auto;
}
.mobile-menu.open { display: block; }
.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu a {
  display: block; padding: 16px 4px; font-family: var(--serif); font-size: 1.5rem;
  color: var(--ink-0); border-bottom: 1px solid var(--line);
}
.mobile-menu .nav-cta { flex-direction: column; align-items: stretch; margin-top: 28px; gap: 12px; }
.mobile-menu .btn { justify-content: center; }

/* ---- hero ---- */
.hero { padding: 72px 0 56px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  background: var(--bg-2); border: 1px solid var(--line-strong);
  font-size: 0.82rem; color: var(--ink-1); margin-bottom: 24px;
}
.hero-badge strong { color: var(--copper-bright); }
.hero h1 { margin-bottom: 20px; }
.hero .accent { color: var(--copper-bright); font-style: italic; }
.hero-sub { font-size: 1.15rem; color: var(--ink-1); max-width: 56ch; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero-panel {
  border-radius: var(--r-card);
  background: var(--bg-1);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-glow);
  padding: 28px;
  display: grid;
  gap: 16px;
  align-content: center;
  min-height: 320px;
  position: relative;
  overflow: hidden;
}
.hero-panel::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 0%, var(--copper-glow), transparent 55%);
}
.hp-row { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 10px; background: var(--bg-2); border: 1px solid var(--line); font-family: var(--mono); font-size: 0.82rem; color: var(--ink-1); position: relative; z-index: 1; }
.hp-row .dot { width: 7px; height: 7px; border-radius: 50%; background: #6bcf7f; flex: none; box-shadow: 0 0 0 3px rgba(107,207,127,0.18); }
.hp-quote { position: relative; z-index: 1; padding-top: 6px; border-top: 1px solid var(--line); margin-top: 4px; }
.hp-quote-stars { color: var(--copper-bright); letter-spacing: 2px; font-size: 0.85rem; margin-bottom: 8px; }
.hp-quote-text { font-family: var(--serif); font-size: 1.05rem; color: var(--ink-0); margin-bottom: 8px; }
.hp-quote-by { font-size: 0.82rem; color: var(--ink-2); }

.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 40px; }
}

.section-divider { height: 1px; background: var(--line); max-width: var(--wrap); margin: 0 auto; }

/* ---- sections ---- */
.section { padding: 88px 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
@media (max-width: 720px) { .section { padding: 56px 0; } }

/* ---- services grid ---- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 980px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .services-grid { grid-template-columns: 1fr; } }

.service-card {
  border-radius: var(--r-card);
  background: var(--bg-1);
  border: 1px solid var(--line);
  padding: 28px;
  display: flex; flex-direction: column; gap: 14px;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}
.service-card:hover { transform: translateY(-3px); border-color: var(--line-strong); box-shadow: var(--shadow-2); }
.service-num { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-3); }
.service-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--copper-glow); color: var(--copper-bright); flex: none;
}
.service-card h3 { margin-top: 4px; }
.service-card p { color: var(--ink-1); font-size: 0.94rem; flex: 1; }
.service-card .btn { margin-top: 4px; align-self: flex-start; }

/* service detail blocks (services.html) */
.service-detail {
  display: grid; grid-template-columns: 220px 1fr; gap: 40px;
  padding: 56px 0; border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}
.service-detail:first-of-type { border-top: none; padding-top: 0; }
.service-detail-aside { display: flex; flex-direction: column; gap: 14px; }
.service-detail-body p { color: var(--ink-1); margin-bottom: 16px; max-width: 68ch; }
.service-detail-body ul { display: grid; gap: 10px; margin: 20px 0 24px; }
.service-detail-body ul li { display: flex; gap: 10px; color: var(--ink-1); font-size: 0.95rem; align-items: flex-start; }
.service-detail-body ul li svg { flex: none; margin-top: 3px; color: var(--copper); }
@media (max-width: 720px) {
  .service-detail { grid-template-columns: 1fr; gap: 16px; }
}

/* ---- why / cards ---- */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 980px) { .why-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .why-grid { grid-template-columns: 1fr; } }
.why-card { border-radius: var(--r-card); background: var(--bg-1); border: 1px solid var(--line); padding: 26px; }
.why-card.feature { grid-column: span 2; background: linear-gradient(150deg, var(--bg-2), var(--bg-1)); }
@media (max-width: 980px) { .why-card.feature { grid-column: span 2; } }
@media (max-width: 640px) { .why-card.feature { grid-column: span 1; } }
.why-num { font-family: var(--mono); color: var(--copper); font-size: 0.85rem; margin-bottom: 10px; }
.why-card h3 { margin-bottom: 10px; }
.why-card p { color: var(--ink-1); font-size: 0.94rem; }
.why-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.why-tag { font-family: var(--mono); font-size: 0.72rem; padding: 4px 10px; border-radius: 999px; background: var(--bg-2); border: 1px solid var(--line); color: var(--ink-2); }

/* ---- stats band ---- */
.stats-band { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding: 40px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
@media (max-width: 720px) { .stats-band { grid-template-columns: 1fr; gap: 28px; text-align: center; } }
.stat-num { font-family: var(--serif); font-size: clamp(1.8rem, 4vw, 2.6rem); color: var(--copper-bright); }
.stat-label { color: var(--ink-2); font-size: 0.88rem; margin-top: 4px; }

/* ---- realisations / cases ---- */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 720px) { .cases-grid { grid-template-columns: 1fr; } }
.case-card { border-radius: var(--r-card); background: var(--bg-1); border: 1px solid var(--line); padding: 28px; display: flex; flex-direction: column; gap: 12px; }
.case-tag { font-family: var(--mono); font-size: 0.72rem; color: var(--copper); text-transform: uppercase; letter-spacing: 0.06em; }
.case-card h3 { font-size: 1.2rem; }
.case-card p { color: var(--ink-1); font-size: 0.94rem; }
.case-result { font-family: var(--mono); font-size: 0.88rem; color: var(--copper-bright); padding-top: 10px; border-top: 1px solid var(--line); margin-top: 4px; }
.placeholder-note {
  border: 1px dashed var(--line-strong); border-radius: var(--r-card);
  padding: 24px; color: var(--ink-2); font-size: 0.9rem; text-align: center;
}

/* ---- contact ---- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-list { display: grid; gap: 18px; margin: 28px 0; }
.contact-list li { display: flex; align-items: flex-start; gap: 14px; }
.contact-list .ic { width: 36px; height: 36px; border-radius: 10px; background: var(--bg-2); border: 1px solid var(--line); display: grid; place-items: center; color: var(--copper); flex: none; }
.contact-list .lbl { display: block; font-size: 0.78rem; color: var(--ink-2); margin-bottom: 2px; }
.contact-list a, .contact-list span.value { font-size: 0.98rem; color: var(--ink-0); }
.contact-list a:hover { color: var(--copper); }
.socials { display: flex; gap: 10px; margin-top: 8px; }
.socials a { width: 38px; height: 38px; border-radius: 10px; background: var(--bg-2); border: 1px solid var(--line); display: grid; place-items: center; color: var(--ink-1); transition: color 160ms ease, border-color 160ms ease; }
.socials a:hover { color: var(--copper); border-color: var(--line-strong); }

.contact-form { background: var(--bg-1); border: 1px solid var(--line); border-radius: var(--r-card); padding: 32px; box-shadow: var(--shadow-1); }
.contact-form h3 { margin-bottom: 20px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.85rem; color: var(--ink-1); margin-bottom: 7px; }
.input, .textarea, select.input {
  width: 100%; padding: 12px 14px; border-radius: 10px;
  background: var(--bg-0); border: 1px solid var(--line-strong);
  color: var(--ink-0); font: inherit; font-size: 0.95rem;
  transition: border-color 160ms ease;
}
.input:focus, .textarea:focus, select.input:focus { outline: none; border-color: var(--copper); }
.textarea { resize: vertical; min-height: 120px; }
.form-toast { display: none; margin-top: 14px; padding: 12px 14px; border-radius: 10px; background: rgba(107,207,127,0.12); border: 1px solid rgba(107,207,127,0.35); color: #6bcf7f; font-size: 0.88rem; }
.form-toast.error { background: rgba(220,80,80,0.12); border-color: rgba(220,80,80,0.35); color: #e08080; }
.form-toast.show { display: block; }

/* ---- cta band ---- */
.cta-band { background: linear-gradient(150deg, var(--bg-2), var(--bg-1)); border-radius: var(--r-card); border: 1px solid var(--line); padding: 48px; text-align: center; }
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { color: var(--ink-1); margin: 0 auto 26px; max-width: 50ch; }
.cta-band .btn-row { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
@media (max-width: 640px) { .cta-band { padding: 32px 22px; } }

/* ---- footer ---- */
footer { border-top: 1px solid var(--line); padding: 56px 0 28px; background: var(--bg-1); }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media (max-width: 720px) { .foot-grid { grid-template-columns: 1fr; gap: 28px; } }
.foot-tag { color: var(--ink-2); font-size: 0.9rem; margin-top: 14px; max-width: 34ch; }
.foot-col h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-2); margin-bottom: 16px; font-family: var(--sans); font-weight: 600; }
.foot-col ul { display: grid; gap: 10px; }
.foot-col a { color: var(--ink-1); font-size: 0.92rem; }
.foot-col a:hover { color: var(--copper); }
.foot-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; border-top: 1px solid var(--line); flex-wrap: wrap; gap: 12px; font-size: 0.82rem; color: var(--ink-3); }

/* ---- breadcrumb / page header (inner pages) ---- */
.page-head { padding: 56px 0 8px; }
.page-head .eyebrow { margin-bottom: 18px; }
.page-head p.sub { margin-top: 16px; }

/* ---- reveal animation ---- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 560ms ease, transform 560ms ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(16px); transition: opacity 520ms ease, transform 520ms ease; }
.reveal-stagger.in > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.in > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: 60ms; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: 120ms; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: 180ms; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: 240ms; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: 300ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-stagger > * { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---- skip link ---- */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--copper); color: #1a1410; padding: 12px 18px; border-radius: 0 0 10px 0;
  font-size: 0.9rem; font-weight: 600;
}
.skip-link:focus { left: 0; }