/* ═══════════════════════════════════════════════════════════
   DS PROJECT — components.css
   Boutons · Navigation · Formulaires · Retour en haut
═══════════════════════════════════════════════════════════ */


/* ════════════════════════
   BOUTONS
════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1;
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--transition),
    border-color     var(--transition),
    color            var(--transition),
    transform        var(--transition),
    box-shadow       var(--transition);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

/* Primaire — fond doré, texte noir */
.btn-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #0D0D0D;
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-primary:active { transform: translateY(0); box-shadow: none; }

/* Contour — bordure dorée, texte doré → fond doré au hover */
.btn-outline {
  background-color: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-outline:hover {
  background-color: var(--color-accent);
  color: #0D0D0D;
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

/* Fantôme — contour sombre pour fonds clairs */
.btn-ghost {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Tailles */
.btn-sm  { padding: 0.5rem 1.1rem; font-size: 0.8rem; }
.btn-lg  { padding: 0.9rem 2rem; font-size: 1rem; }
.btn-full { width: 100%; }

/* Icône dans le bouton */
.btn-icon { flex-shrink: 0; transition: transform var(--transition); }
.btn:hover .btn-icon { transform: translateX(3px); }


/* ════════════════════════
   NAVIGATION FIXE
════════════════════════ */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition:
    box-shadow       var(--transition-slow),
    border-bottom-color var(--transition-slow);
}

/* Classe ajoutée par JS au scroll */
#header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.1);
  border-bottom-color: transparent;
}

.nav { height: var(--nav-height); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo texte — fallback si pas de fichier image */
.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  transition: opacity var(--transition);
}

.logo:hover { opacity: 0.8; }

/* [LOGO_URL] — Classe pour le <img> logo */
.logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

/* Fallback texte "DS PROJECT" en Montserrat Bold */
.logo-text {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

/* Point doré decoratif après le texte logo */
.logo-text::after {
  content: '.';
  color: var(--color-accent);
}

/* Liens de navigation (desktop) */
.nav-links {
  display: none;
  list-style: none;
  gap: var(--space-xl);
  align-items: center;
}

@media (min-width: 1024px) { .nav-links { display: flex; } }

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}

/* Soulignement doré animé */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  border-radius: 1px;
}

.nav-link:hover           { color: var(--color-text); }
.nav-link:hover::after,
.nav-link.active::after   { transform: scaleX(1); }
.nav-link.active          { color: var(--color-text); }


/* ── Burger (mobile) ── */
.burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition);
  -webkit-tap-highlight-color: transparent;
}

@media (min-width: 1024px) { .burger { display: none; } }

.burger:hover { background-color: rgba(0,0,0,0.06); }

.burger:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.burger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* État ouvert */
.burger.is-open .burger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-open .burger-line:nth-child(2) { opacity: 0; transform: scaleX(0); }
.burger.is-open .burger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Menu mobile déployé */
.nav-links.is-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-xl) var(--space-xl);
  gap: 0;
  align-items: stretch;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.nav-links.is-open li {
  border-bottom: 1px solid var(--color-border-light);
}

.nav-links.is-open li:last-child {
  border-bottom: none;
  padding-top: var(--space-md);
}

.nav-links.is-open .nav-link {
  display: block;
  padding: 0.875rem 0;
  font-size: 1rem;
  color: var(--color-text);
}

.nav-links.is-open .btn-primary { width: 100%; justify-content: center; }


/* ════════════════════════
   FORMULAIRES (fond clair)
════════════════════════ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.required {
  color: var(--color-accent);
  margin-left: 1px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: #ffffff;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.5;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--color-text-light); }

/* Select — flèche personnalisée (sombre) */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-select option { background-color: #ffffff; color: var(--color-text); }

/* Focus — bordure dorée */
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(201,168,76,0.15);
}

/* Erreur */
.form-input.error,
.form-select.error,
.form-textarea.error { border-color: var(--color-error); }

.form-error {
  font-size: 0.78rem;
  color: var(--color-error);
  min-height: 1.1em;
}

.form-textarea { resize: vertical; min-height: 120px; }

/* Rangée 2 colonnes sur tablette+ */
.form-row { display: grid; gap: var(--space-md); }

@media (min-width: 640px) { .form-row { grid-template-columns: 1fr 1fr; } }

/* Message de succès */
.form-success {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: var(--space-md) var(--space-lg);
  background-color: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius);
  color: #047857;
  font-size: 0.95rem;
  margin-top: var(--space-md);
}


/* ════════════════════════
   BOUTON RETOUR EN HAUT
════════════════════════ */
.back-to-top {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  width: 44px;
  height: 44px;
  background-color: var(--color-accent);
  color: #0D0D0D;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition:
    opacity    var(--transition),
    transform  var(--transition),
    background-color var(--transition);
  box-shadow: var(--shadow-accent);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-3px);
}

.back-to-top:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}