/* ============================================================
   AVENUE BELMONT — BASE
   Reset, typographie, composants réutilisables
   ============================================================ */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  /* overflow-x: clip (et non hidden) : empêche le scroll horizontal sans
     transformer html/body en conteneur de scroll, ce qui casserait tous
     les position: sticky de la page (ex. section Authentification). */
  overflow-x: clip;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* ── Typographie ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-regular);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-primary);
}

h1 { font-size: clamp(var(--text-4xl), 6vw, var(--text-6xl)); }
h2 { font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl)); }
h3 { font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl)); }
h4 { font-size: clamp(var(--text-xl),  2vw, var(--text-3xl)); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  line-height: var(--leading-normal);
  color: var(--color-text-muted);
}

strong { font-weight: var(--weight-semibold); color: var(--color-text); }
small  { font-size: var(--text-xs); letter-spacing: var(--tracking-wide); text-transform: uppercase; }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-px);
}
.container--wide   { max-width: var(--container-wide); }
.container--narrow { max-width: var(--container-narrow); }

/* ── Sections ── */
.section    { padding-block: clamp(var(--space-16), 10vw, var(--space-32)); }
.section--sm { padding-block: clamp(var(--space-10), 6vw, var(--space-20)); }
.section--lg { padding-block: clamp(var(--space-24), 14vw, var(--space-40)); }

/* ── Label / Overline ── */
.label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-primary-mid);
}
.label--light { color: rgba(255,255,255,0.5); }
.label--grey  { color: var(--color-secondary-dark); }

/* ── Classes typographiques sémantiques ── */
.type-h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  text-transform: uppercase;
  line-height: var(--leading-tight);
  letter-spacing: -0.01em;
  color: var(--color-black);
}
.type-h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  font-weight: 600;
  text-transform: uppercase;
  line-height: var(--leading-tight);
  color: var(--color-black);
}
.type-h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 600;
  text-transform: uppercase;
  line-height: var(--leading-snug);
  color: var(--color-black);
}
.type-h4 {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-grey-600);
}
.type-body-lg {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 300;
  line-height: var(--leading-loose);
  color: var(--color-grey-800);
}
.type-body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: var(--leading-normal);
  color: var(--color-grey-800);
}
.type-body-sm {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: var(--leading-normal);
  color: var(--color-grey-600);
}
.type-caption {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-grey-600);
}
.type-price {
  font-family: var(--font-body);
  font-size: clamp(1.4rem, 2vw, 1.75rem);
  font-weight: 600;
  color: var(--color-black);
}
.type-ref {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-grey-500);
}

/* ── Divider ── */
.divider {
  width: 36px;
  height: 1px;
  background: var(--color-primary-mid);
  margin-block: var(--space-5);
  opacity: 0.4;
}
.divider--center { margin-inline: auto; }
.divider--wide   { width: 60px; }
.divider--light  { background: rgba(255,255,255,0.3); }

/* ── Boutons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  position: relative;
}

/* Primaire — bordeaux sombre */
.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-mid);
  border-color: var(--color-primary-mid);
  color: var(--color-white);
}

/* Outline bordeaux */
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* Outline blanc (sur fond sombre) */
.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.45);
}
.btn--outline-white:hover {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

/* Secondaire — gris */
.btn--secondary {
  background: var(--color-secondary);
  color: var(--color-primary);
  border-color: var(--color-secondary);
}
.btn--secondary:hover {
  background: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  color: var(--color-white);
}

/* Ghost — texte avec flèche */
.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: transparent;
  padding-inline: 0;
  gap: var(--space-3);
}
.btn--ghost::after {
  content: '→';
  transition: transform var(--transition-base);
  display: inline-block;
}
.btn--ghost:hover::after { transform: translateX(5px); }
.btn--ghost-light { color: rgba(255,255,255,0.75); }
.btn--ghost-light:hover { color: var(--color-white); }

/* WhatsApp */
.btn--whatsapp {
  background: #25D366;
  color: var(--color-white);
  border-color: #25D366;
}
.btn--whatsapp:hover {
  background: #1ebe5d;
  border-color: #1ebe5d;
}

/* ── Badges ── */
.badge {
  display: inline-block;
  font-size: 10px;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  padding: 3px 10px;
}
.badge--primary   { background: var(--color-primary); color: var(--color-white); }
.badge--secondary { background: var(--color-secondary); color: var(--color-primary); }
.badge--sold      { background: var(--color-grey-400); color: var(--color-white); }

/* ── Grilles ── */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--space-8); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--space-8); }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--space-6); }

@media (max-width:1024px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .grid-3 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width:640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Utilitaires ── */
.text-center  { text-align: center; }
.text-left    { text-align: left; }
.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col     { display: flex; flex-direction: column; }
.gap-4        { gap: var(--space-4); }
.gap-6        { gap: var(--space-6); }
.gap-8        { gap: var(--space-8); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ── Animations minimalistes ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; opacity: 1; transform: none; }
}