/* PW Consulting — feuille de style partagée */

:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --fg-muted: #555;
  --bg: #fafafa;
  --bg-elev: #ffffff;
  --border: #e4e4e4;
  --accent: #1c5b99;
  --accent-strong: #144577;
  --accent-warm: #ffb208;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.06);
  --radius: 12px;
  --max-w: 64rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --fg-muted: #a0a0a0;
    --bg: #0f1419;
    --bg-elev: #161c22;
    --border: #2a323b;
    --accent: #6cb4e0;
    --accent-strong: #8ec7eb;
    --accent-warm: #ffb208;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.5);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease, color 120ms ease;
}
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}
@media (hover: hover) {
  a:hover { border-bottom-color: currentColor; }
}
a:active { color: var(--accent-strong); }

h1, h2, h3 {
  color: var(--fg);
  line-height: 1.25;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); font-weight: 600; }
h3 { font-size: 1.125rem; font-weight: 600; }
p { margin: 0 0 1rem; }

/* Layout */
.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
  padding-top: env(safe-area-inset-top);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  color: var(--fg);
  border: none;
}
.brand img {
  height: 1.75rem;
  width: auto;
  display: block;
}
@media (prefers-color-scheme: dark) {
  .brand img {
    /* léger éclaircissement du logo bleu en dark mode pour rester lisible */
    filter: brightness(1.15) saturate(0.95);
  }
}
.nav {
  display: flex;
  gap: clamp(0.5rem, 2vw, 1.25rem);
  align-items: center;
}
.nav a {
  color: var(--fg-muted);
  font-size: 0.95rem;
  padding: 0.5rem 0.25rem;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
}
@media (hover: hover) {
  .nav a:hover { color: var(--fg); border-bottom-color: transparent; }
}
.nav .lang-switch {
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  min-width: 48px;
  justify-content: center;
}
@media (hover: hover) {
  .nav .lang-switch:hover {
    border-color: var(--accent);
    color: var(--accent);
    border-bottom-color: var(--accent);
  }
}
@media (max-width: 540px) {
  .nav a:not(.lang-switch) { display: none; }
}

/* Hero */
.hero {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 6vw, 4rem);
}
.hero .eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}
.hero h1 { max-width: 36ch; }
.hero .lead {
  font-size: clamp(1.125rem, 2.5vw, 1.25rem);
  color: var(--fg-muted);
  max-width: 52ch;
  margin-top: 1rem;
}
.cta-row {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 80ms ease, background 120ms ease, border-color 120ms ease;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:active { transform: translateY(1px); }
@media (hover: hover) {
  .btn-primary:hover { background: var(--accent-strong); border-bottom-color: transparent; }
}
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
@media (hover: hover) {
  .btn-ghost:hover { border-color: var(--fg-muted); border-bottom-color: var(--fg-muted); }
}

/* Sections */
section.section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
section.section + section.section { border-top: 1px solid var(--border); }
.section-head { max-width: 48ch; margin-bottom: 2.5rem; }
.section-head p { color: var(--fg-muted); margin-top: 0.5rem; }

/* Pillars grid */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.25rem;
}
.pillar {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.pillar .icon {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  margin-bottom: 1rem;
}
.pillar .icon svg { width: 1.25rem; height: 1.25rem; }
.pillar h3 { margin-bottom: 0.375rem; }
.pillar p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* Approach */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1.25rem 2rem;
  margin-top: 1.5rem;
}
.approach-item h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}
.approach-item p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* Contact */
.contact-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2rem);
  box-shadow: var(--shadow);
  display: grid;
  gap: 1rem;
}
.contact-card dl {
  margin: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.5rem 1rem;
  font-size: 0.95rem;
}
.contact-card dt { color: var(--fg-muted); }
.contact-card dd { margin: 0; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 calc(2.5rem + env(safe-area-inset-bottom));
  color: var(--fg-muted);
  font-size: 0.875rem;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}
.site-footer a { color: var(--fg-muted); }
@media (hover: hover) {
  .site-footer a:hover { color: var(--fg); }
}

/* Legal page */
.legal {
  padding: clamp(2rem, 5vw, 4rem) 0;
  max-width: 50rem;
}
.legal h2 {
  margin-top: 2.5rem;
  font-size: 1.25rem;
  font-weight: 600;
}
.legal h2:first-of-type { margin-top: 1rem; }
.legal address {
  font-style: normal;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}
.legal ul { padding-left: 1.25rem; }
.legal li { margin-bottom: 0.25rem; }

/* Skip link (a11y) */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip:focus {
  left: 0.5rem;
  top: 0.5rem;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  z-index: 100;
}

/* Print */
@media print {
  .site-header, .cta-row, .site-footer .legal-link { display: none; }
  body { background: #fff; color: #000; }
}