/* ============================================================
   BASE — variables, reset, typographie, boutons, feuille levée
   ============================================================ */
:root {
  --green-900: #1b4332;
  --green-800: #22543e;
  --green-700: #2d6a4f;
  --green-950: #17392b; /* Profondeur du bain, second point du dégradé de fond */
  --ink-overlay: 19, 48, 35; /* Voile sombre du hero (rgba(var(--ink-overlay), alpha)) */
  --teal: #2f8f7f;
  --teal-bright: #36a18c;
  --mint: #d8f3dc;
  --mint-soft: #eef7f0;
  --beige: #f5f1e8;
  --paper: #faf8f2;
  --gold: #c9a86a;
  --gold-soft: #e7d6ad;
  --ink: #243029;
  --ink-soft: #4b5a51;

  --serif: "Cormorant Garamond", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;

  --maxw: 1180px;
  --gut: 30px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  /* Le bain : jamais un aplat, toujours une profondeur d'eau épaissie */
  background:
    radial-gradient(120% 80% at 20% 0%, var(--green-800), transparent 60%),
    radial-gradient(100% 70% at 85% 100%, var(--green-950), transparent 65%), var(--green-900);
  background-attachment: fixed;
  color: var(--mint-soft);
  font-family: var(--sans);
  font-size: 1.06rem;
  line-height: 1.7;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.08;
  margin: 0;
}

p {
  margin: 0 0 1.15em;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gut);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  border: 0;
  border-radius: 2px;
  cursor: pointer;
  transition:
    background-color 0.25s ease,
    color 0.25s ease,
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

.btn-gold {
  background: var(--gold);
  color: var(--green-900);
}

.btn-gold:hover,
.btn-gold:focus-visible {
  background: var(--gold-soft);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -16px rgba(0, 0, 0, 0.75);
}

.btn-line {
  background: transparent;
  color: var(--green-800);
  box-shadow: inset 0 0 0 1.5px rgba(45, 106, 79, 0.45);
}

.btn-line:hover,
.btn-line:focus-visible {
  background: var(--mint-soft);
  box-shadow: inset 0 0 0 1.5px var(--green-700);
}

/* Sur le bain, le bouton filet passe en clair */
.planning .btn-line,
.videos .btn-line,
.close .btn-line,
.event .btn-line {
  color: var(--mint);
  box-shadow: inset 0 0 0 1.5px rgba(216, 243, 220, 0.42);
}

.planning .btn-line:hover,
.videos .btn-line:hover,
.close .btn-line:hover,
.event .btn-line:hover {
  background: rgba(216, 243, 220, 0.12);
  box-shadow: inset 0 0 0 1.5px var(--mint);
}

.btn-big {
  padding: 17px 34px;
  font-size: 1rem;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- La feuille levée ---------- */
.sheet {
  background: var(--paper);
  color: var(--ink);
  padding: 48px 52px 52px;
  position: relative;
  box-shadow: 0 30px 70px -34px rgba(0, 0, 0, 0.85);
}

.sheet h2,
.sheet h3 {
  color: var(--green-900);
}

.sheet p {
  color: var(--ink-soft);
}

.sheet b {
  color: var(--ink);
  font-weight: 700;
}