:root {
  --primary: #0f766e;
  --primary-dark: #115e59;
  --primary-light: #f0fdfa;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #f8fafc;
  --white: #ffffff;
  --danger: #dc2626;
  --warning: #d97706;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
  --font: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 17px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), #14b8a6);
  color: #fff;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 15px;
}
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  color: var(--ink);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 8px;
}
.nav-links a:hover { background: var(--primary-light); text-decoration: none; }
.nav-links .nav-cta {
  background: var(--primary);
  color: #fff;
  margin-left: 8px;
}
.nav-links .nav-cta:hover { background: var(--primary-dark); }
.nav-toggle { display: none; background: none; border: 0; font-size: 24px; cursor: pointer; }

/* ---------- Layout ---------- */
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section-title { font-size: 30px; margin: 0 0 8px; letter-spacing: -0.5px; }
.section-sub { color: var(--muted); margin: 0 0 36px; max-width: 640px; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #134e4a 60%, #0f766e 100%);
  color: #fff;
  padding: 96px 0;
}
.hero-grid {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 48px;
  align-items: center;
}
.hero h1 { font-size: 44px; line-height: 1.15; margin: 0 0 16px; letter-spacing: -1px; }
.hero p { font-size: 18px; color: #b6d7d2; margin: 0 0 32px; max-width: 540px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-actions .btn-secondary { background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.3); color: #fff; }
.hero-actions .btn-secondary:hover { background: rgba(255, 255, 255, 0.18); }
.hero-card {
  background: #fff;
  color: var(--ink);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.hero-card h3 { margin: 0 0 12px; font-size: 18px; }
.hero-card p { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 40px; }
.hero-stats div { background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.12); border-radius: 12px; padding: 16px; text-align: center; }
.hero-stats strong { display: block; font-size: 22px; }
.hero-stats span { font-size: 12px; color: #b6d7d2; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  padding: 12px 22px;
  border-radius: 10px;
  border: 0;
  cursor: pointer;
  transition: background 0.15s;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-lg { padding: 15px 30px; font-size: 16px; }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary-light); }
.btn-block { width: 100%; justify-content: center; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

/* ---------- Cards / Grid ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.feature-icon {
  width: 46px; height: 46px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}
.feature-icon svg { width: 22px; height: 22px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
.price-hint { font-size: 13px; font-weight: 700; color: var(--primary); background: var(--primary-light); display: inline-block; padding: 4px 10px; border-radius: 999px; margin-bottom: 14px; }

/* ---------- Forms ---------- */
.form-card { max-width: 720px; margin: 0 auto; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
label { font-size: 13px; font-weight: 700; color: var(--ink); }
input, select, textarea {
  font: inherit;
  font-size: 15px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  color: var(--ink);
  width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}
textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 13px; color: var(--muted); }

.alert {
  display: none;
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
}
.alert.show { display: block; }
.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* ---------- Availability ---------- */
.slot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px; }
.slot {
  padding: 10px;
  text-align: center;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  background: #fff;
  transition: all 0.12s;
}
.slot:hover { border-color: var(--primary); }
.slot.selected { background: var(--primary); border-color: var(--primary); color: #fff; }
.slot[disabled] { opacity: 0.4; cursor: not-allowed; text-decoration: line-through; }
.slot-empty { color: var(--muted); font-size: 14px; }

/* ---------- Contact / Infos ---------- */
.contact-card p { color: var(--muted); font-size: 15px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact-item:last-child { border-bottom: 0; }
.contact-item strong { display: block; font-size: 14px; }
.contact-item span { font-size: 14px; color: var(--muted); }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { position: relative; }
.step-num {
  width: 40px; height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  margin-bottom: 14px;
}
.step h3 { font-size: 16px; margin: 0 0 6px; }
.step p { color: var(--muted); font-size: 14px; margin: 0; }

/* ---------- Footer ---------- */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 56px 0 32px;
  margin-top: 72px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.site-footer h4 { color: #fff; margin: 0 0 14px; font-size: 15px; }
.site-footer a { color: #94a3b8; display: block; margin-bottom: 8px; font-size: 14px; }
.site-footer a:hover { color: #fff; }
.site-footer p { font-size: 14px; margin: 0; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); margin-top: 40px; padding-top: 20px; text-align: center; font-size: 13px; }

/* ---------- Badge / misc ---------- */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge.nouveau { background: #fef3c7; color: #92400e; }
.badge.confirme { background: #d1fae5; color: #065f46; }
.badge.traite { background: #e0e7ff; color: #3730a3; }
.badge.annule { background: #fee2e2; color: #991b1b; }

/* ---------- Admin ---------- */
.admin-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.admin-table th, .admin-table td { padding: 12px 14px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.admin-table th { background: var(--primary-light); color: var(--primary-dark); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.admin-table tr:last-child td { border-bottom: 0; }
.admin-login { max-width: 400px; margin: 80px auto; }
.admin-tabs { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.admin-tabs button { padding: 10px 18px; border-radius: 10px; border: 1px solid var(--line); background: #fff; font-weight: 700; font-size: 14px; cursor: pointer; color: var(--ink); }
.admin-tabs button.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.status-select { font-size: 13px; padding: 6px 8px; border-radius: 8px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .grid-3, .grid-2, .steps, .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .slot-grid { grid-template-columns: repeat(3, 1fr); }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 12px 24px 20px;
    gap: 4px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
}