/* ==========================================================================
   StudyCare — Composants UI partagés (consomme tokens.css)
   Header, footer, boutons, inputs, cartes, utilitaires. Réutilisés par toutes
   les pages de l'app (accueil, connexion, …).
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  font-weight: var(--fw-normal);
  line-height: 1.55;
  color: var(--c-body);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { color: var(--c-heading); font-weight: var(--fw-bold); line-height: 1.2; margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--c-blue); outline-offset: 2px; border-radius: 4px; }

/* ---- Layout ---- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--sp-5); }
.section { padding-block: var(--sp-8); }
.section--soft { background: var(--c-bg-soft); }
.text-accent { color: var(--c-primary); }
.text-blue   { color: var(--c-blue); }

/* =====================================================================
   BOUTONS
   ===================================================================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  font-family: inherit; font-size: var(--fs-xs); font-weight: var(--fw-medium);
  line-height: 1; text-align: center; white-space: nowrap;
  padding: 12px 20px; border-radius: var(--r-sm); border: 0;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease, transform .05s ease;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--c-primary); color: var(--c-on-primary); }
.btn--primary:hover { background: var(--c-primary-hover); }
.btn--blue { background: var(--c-blue); color: #fff; }
.btn--blue:hover { background: var(--c-blue-hover); }
.btn--blue-deep { background: var(--c-blue-deep); color: #fff; }
.btn--outline { background: #fff; color: var(--c-heading); border: 2px solid var(--c-border); }
.btn--outline:hover { border-color: var(--c-border-strong); }
.btn--outline-blue { background: #fff; color: var(--c-blue); border: 1.5px solid var(--c-blue); }
.btn--outline-blue:hover { background: var(--c-blue-soft); }
.btn--ghost { background: transparent; color: var(--c-heading); }
.btn--ghost:hover { background: var(--c-bg-soft); }
.btn--lg { padding: 14px 28px; font-size: var(--fs-sm); }
.btn--block { width: 100%; }
.btn--pill { border-radius: var(--r-pill); }
.btn:disabled, .btn[aria-disabled="true"] {
  background: var(--c-disabled-bg); color: var(--c-disabled-fg); cursor: not-allowed; border-color: transparent;
}
.btn:disabled:hover { background: var(--c-disabled-bg); }

/* Lien texte accent */
.link-accent { color: var(--c-primary); font-weight: var(--fw-medium); }
.link-accent:hover { text-decoration: underline; }
.link-muted { color: var(--c-muted); }
.link-muted:hover { color: var(--c-heading); }

/* =====================================================================
   CHAMPS DE FORMULAIRE
   ===================================================================== */
.field { display: block; margin-bottom: var(--sp-4); }
.field__label { display: block; font-size: var(--fs-xs); font-weight: var(--fw-semibold); color: var(--c-heading); margin-bottom: var(--sp-2); }
.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap__icon { position: absolute; left: 14px; display: flex; color: var(--c-faint); pointer-events: none; }
.input {
  width: 100%; font-family: inherit; font-size: var(--fs-xs); font-weight: var(--fw-light);
  color: var(--c-heading); background: #fff;
  border: 1px solid var(--c-border); border-radius: var(--r-lg);
  padding: 13px 14px; transition: border-color .15s ease, box-shadow .15s ease;
}
.input--icon { padding-left: 42px; }
.input::placeholder { color: var(--c-faint); }
.input:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-soft); }
.input-wrap__toggle { position: absolute; right: 12px; background: none; border: 0; color: var(--c-faint); display: flex; padding: 4px; }
.input-wrap__toggle:hover { color: var(--c-muted); }

/* =====================================================================
   CARTE
   ===================================================================== */
.card { background: var(--c-surface); border-radius: var(--r-xl); box-shadow: var(--shadow-card); }
.card--pad { padding: var(--sp-7); }

/* =====================================================================
   HEADER
   ===================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h); background: #fff; border-bottom: 1px solid var(--c-border);
}
.site-header__inner { height: 100%; display: flex; align-items: center; gap: var(--sp-5); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: var(--fw-bold); font-size: 1.35rem; color: var(--c-text); }
.brand__logo { width: 30px; height: 30px; }
.brand__logo-img { height: 34px; width: auto; display: block; }
.nav { display: flex; align-items: center; gap: var(--sp-6); margin-inline: auto; }
.nav a { font-size: var(--fs-xs); font-weight: var(--fw-medium); color: var(--c-heading); }
.nav a:hover { color: var(--c-primary); }
.header-actions { display: flex; align-items: center; gap: var(--sp-3); }
.nav-toggle { display: none; background: none; border: 0; color: var(--c-heading); padding: 6px; }

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer { background: var(--c-blue-deep); color: rgba(255,255,255,.85); padding-block: var(--sp-8) var(--sp-6); }
.site-footer a { color: rgba(255,255,255,.85); font-size: var(--fs-xs); }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--sp-6); }
.footer-brand { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer-brand .brand { color: #fff; }
.footer-col h4 { color: #fff; font-size: var(--fs-xs); margin-bottom: var(--sp-3); font-weight: var(--fw-semibold); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-social { display: flex; gap: var(--sp-3); margin-top: var(--sp-2); }
.footer-bottom { margin-top: var(--sp-6); padding-top: var(--sp-4); border-top: 1px solid rgba(255,255,255,.15); font-size: var(--fs-xs); color: rgba(255,255,255,.7); }

/* =====================================================================
   HELPERS
   ===================================================================== */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.stack { display: flex; flex-direction: column; }
.divider-or { display: flex; align-items: center; gap: var(--sp-3); color: var(--c-muted); font-size: var(--fs-xs); margin-block: var(--sp-4); }
.divider-or::before, .divider-or::after { content: ""; flex: 1; height: 1px; background: var(--c-border); }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 860px) {
  .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; flex-direction: column;
         gap: 0; background: #fff; border-bottom: 1px solid var(--c-border); padding: var(--sp-3) var(--sp-5); }
  .nav.open { display: flex; }
  .nav a { padding-block: 12px; width: 100%; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .header-actions .btn--hide-sm { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .container { padding-inline: var(--sp-4); }
}