:root {
  --bg: #f9fafb;
  --surface: #ffffff;
  --text-strong: #0f172a;
  --text: #334155;
  --text-soft: #64748b;
  --border: #e5e7eb;
  --radius: 10px;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

.page {
  min-height: 100vh;
  max-width: 900px;
  margin: 0 auto;
  padding: 36px 20px;
}

/* GRID DES TUILES */

.tiles {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

/* TUILE */

.tile {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 18px 18px;
  cursor: pointer;
  text-align: left;
  transition:
    border-color 120ms ease,
    background-color 120ms ease,
    transform 120ms ease;
}

.tile__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-strong);
  letter-spacing: -0.01em;
}

.tile:hover {
  transform: translateY(-1px);
  background-color: #fbfbfb;
  border-color: #d1d5db;
}

.tile:focus-visible {
  outline: 2px solid #0f172a;
  outline-offset: 3px;
}

/* OVERLAY */

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 48px 16px;
  background: rgba(15, 23, 42, 0.3);
  backdrop-filter: blur(6px);
  z-index: 100;
}

.overlay--hidden {
  display: none;
}

.overlay__inner {
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  max-width: 820px;
  width: 100%;
  padding: 22px 24px 26px;
}

/* BOUTON FERMER */

.overlay__close {
  float: right;
  border: none;
  background: none;
  font-size: 18px;
  color: var(--text-soft);
  cursor: pointer;
}

/* TITRE & CONTENU */

.overlay__title {
  margin: 0 0 12px 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: -0.01em;
}

.overlay__body {
  color: var(--text);
  line-height: 1.6;
  max-height: 70vh;
  overflow-y: auto;
}

.overlay__body p {
  margin-top: 0;
  margin-bottom: 0.9em;
}

.overlay__body h1,
.overlay__body h2,
.overlay__body h3 {
  color: var(--text-strong);
  letter-spacing: -0.01em;
  margin-top: 1.4em;
  margin-bottom: 0.6em;
}

/* CODE */

.overlay__body code {
  font-family: ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.85em;
}

.overlay__body pre {
  background: #0f172a;
  color: #f9fafb;
  padding: 14px;
  border-radius: 10px;
  overflow: auto;
  font-size: 0.85rem;
}

/* RESPONSIVE */

@media (max-width: 600px) {
  .page {
    padding: 20px 14px;
  }

  .overlay {
    padding: 24px 10px;
  }

  .overlay__inner {
    padding: 18px 16px 20px;
    border-radius: 10px;
  }

  .overlay__title {
    font-size: 1rem;
  }
}