/* =========================================================
   SwiftKit — Feuille de styles principale
   Palette : bleu (#2563EB) + blanc, contrastes WCAG AA
   ========================================================= */

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

/* ---------- Variables de thème ---------- */
:root {
  --color-primary: #2563EB;        /* contraste 4.5:1 sur blanc */
  --color-primary-dark: #1E40AF;
  --color-primary-light: #DBEAFE;
  --color-bg: #FFFFFF;
  --color-surface: #F8FAFC;
  --color-border: #E2E8F0;
  --color-text: #0F172A;           /* contraste 16:1 sur blanc */
  --color-text-muted: #475569;     /* contraste 7:1 sur blanc */
  --color-error: #B91C1C;          /* contraste 5.9:1 sur blanc */
  --color-success: #15803D;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);
  --shadow-lg: 0 10px 25px rgba(15, 23, 42, .08);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: 180ms ease;
}

[data-theme="dark"] {
  --color-primary: #60A5FA;        /* contraste 7:1 sur fond sombre */
  --color-primary-dark: #93C5FD;
  --color-primary-light: #1E3A8A;
  --color-bg: #0F172A;
  --color-surface: #1E293B;
  --color-border: #334155;
  --color-text: #F1F5F9;
  --color-text-muted: #CBD5E1;
  --color-error: #FCA5A5;
  --color-success: #86EFAC;
}

/* ---------- Base ---------- */
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition), color var(--transition);
}

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

/* ---------- Accessibilité ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: white;
  padding: .75rem 1rem;
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Visually hidden mais accessible aux lecteurs d'écran */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(8px);
}
.site-header .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .875rem 1rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}
.brand svg { width: 32px; height: 32px; }

.nav-main { margin-left: auto; display: flex; gap: .25rem; }
.nav-main a {
  padding: .5rem .75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: .9375rem;
  transition: background var(--transition), color var(--transition);
}
.nav-main a:hover,
.nav-main a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.header-controls { display: flex; gap: .25rem; margin-left: .5rem; }
.icon-btn {
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text);
  transition: background var(--transition), border-color var(--transition);
}
.icon-btn:hover { background: var(--color-surface); border-color: var(--color-primary); }
.icon-btn[hidden] { display: none; }
.icon-btn .lang-code { font-weight: 700; font-size: .8125rem; }

/* ---------- Main ---------- */
main { flex: 1; padding: 2rem 0 4rem; }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 2rem 0 3rem; }
.hero h1 {
  font-size: clamp(1.875rem, 5vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: .75rem;
}
.hero p {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  max-width: 640px;
  margin: 0 auto 1.5rem;
}

/* ---------- Grille d'outils ---------- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.tool-card {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}
.tool-card .tool-icon {
  width: 44px; height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: .25rem;
}
.tool-card h3 { font-size: 1.0625rem; font-weight: 600; }
.tool-card p { color: var(--color-text-muted); font-size: .9375rem; }

/* ---------- Vue outil ---------- */
.tool-view { max-width: 780px; margin: 0 auto; }
.tool-view h2 {
  font-size: 1.5rem;
  margin-bottom: .375rem;
  letter-spacing: -.01em;
}
.tool-view .tool-desc {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  margin-bottom: 1rem;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}
.back-link:hover { text-decoration: underline; }

/* ---------- Formulaires ---------- */
form.tool-form {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  margin-bottom: 1.5rem;
}
.field { display: flex; flex-direction: column; gap: .375rem; }
.field label { font-weight: 500; font-size: .9375rem; }
.field input,
.field textarea,
.field select {
  padding: .75rem .875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
}
.field textarea { resize: vertical; min-height: 90px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .75rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
}
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-primary:disabled { opacity: .6; cursor: not-allowed; }
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-primary-light); }

/* ---------- Résultats ---------- */
.results { display: flex; flex-direction: column; gap: 1rem; }
.result-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--color-surface);
}
.result-card h3 { font-size: 1rem; margin-bottom: .5rem; }
.result-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin-top: .5rem;
}
.meta { color: var(--color-text-muted); font-size: .875rem; }

/* Images : grille Pinterest */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: .75rem;
}
.image-grid figure {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-border);
  aspect-ratio: 3 / 4;
}
.image-grid img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition);
}
.image-grid figure:hover img { transform: scale(1.04); }
.image-grid a {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: .5rem;
  background: linear-gradient(to top, rgba(0,0,0,.55), transparent 45%);
  text-decoration: none;
  color: white;
  font-weight: 600;
  opacity: 0;
  transition: opacity var(--transition);
}
.image-grid figure:hover a,
.image-grid a:focus-visible { opacity: 1; }

/* Comparaison avant/après */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem;
  margin-top: .75rem;
}
.compare figure {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-border);
}
.compare img { width: 100%; height: auto; display: block; }
.compare figcaption {
  padding: .375rem .5rem;
  font-size: .8125rem;
  color: var(--color-text-muted);
  background: var(--color-bg);
  text-align: center;
}

/* ---------- États : chargement, vide, erreur ---------- */
.state {
  padding: 1rem;
  border-radius: var(--radius);
  font-size: .9375rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.state-info { background: var(--color-primary-light); color: var(--color-primary-dark); }
.state-error { background: #FEE2E2; color: var(--color-error); }
[data-theme="dark"] .state-error { background: #450A0A; }
.state-empty { background: var(--color-surface); color: var(--color-text-muted); }

.spinner {
  width: 16px; height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Historique ---------- */
.history-list { display: flex; flex-direction: column; gap: .5rem; margin-top: 1rem; }
.history-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}
.history-item .tool-tag {
  font-size: .75rem;
  font-weight: 600;
  padding: .125rem .5rem;
  border-radius: 999px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}
.history-item .meta { flex: 1; min-width: 0; }
.history-item .meta span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: .875rem;
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}
.site-footer nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.site-footer a { color: inherit; text-decoration: none; }
.site-footer a:hover { color: var(--color-primary); text-decoration: underline; }

/* ---------- Toast ---------- */
.toast-container {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  z-index: 200;
  pointer-events: none;
}
.toast {
  padding: .75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
  font-size: .875rem;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: slideUp .2s ease-out;
}
@keyframes slideUp {
  from { transform: translateY(8px); opacity: 0; }
  to   { transform: translateY(0);   opacity: 1; }
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  /* Header : autorise le retour à la ligne */
  .site-header .container {
    flex-wrap: wrap;
    gap: .5rem;
    padding: .625rem 1rem;
  }

  /* Navigation : visible, scrollable horizontalement si besoin */
  .nav-main {
    order: 3;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    padding: .125rem 0;
    gap: .125rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
  }
  .nav-main::-webkit-scrollbar { display: none; } /* Chrome/Safari */

  .nav-main a {
    padding: .375rem .625rem;
    font-size: .8125rem;
    white-space: nowrap;
  }

  /* Contrôles alignés à droite */
  .header-controls { margin-left: auto; }

  /* Comparaison avant/après : passe en colonne */
  .compare { grid-template-columns: 1fr; }
}

/* ---------- Réduction des animations (accessibilité) ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}