/* Police */
/* L'adresse de la police n'est pas versionnée et reste en cache un an : changer le fichier = changer son nom. */
@font-face {
    font-family: 'Plus Jakarta Sans';
    src: url('../fonts/plus-jakarta-sans-latin.v1.woff2') format('woff2');
    font-weight: 200 800;
    font-display: swap;
}

/* Couleurs : thème clair */
:root {
    color-scheme: light;
    --violet: #8b5cf6;
    --pink: #ec4899;
    --gold: #f59e0b;
    --gradient: linear-gradient(135deg, #8b5cf6, #ec4899);

    --bg: linear-gradient(160deg, #faf5ff 0%, #f0e7ff 40%, #fdf2f8 100%);
    --bg-color: #f6efff;
    --halo-opacity: 0.5;

    --surface: #ffffff;
    --surface-glass: rgba(255, 255, 255, 0.8);
    --surface-soft: #faf5ff;
    --surface-tint: #f3e8ff;
    --border: #e9d5ff;
    --border-strong: #c4b5fd;

    --text: #1e1b4b;
    --text-soft: #5b5b7a;
    --text-faint: #8f8aac;
    --label: #7c3aed;
    --placeholder: #b3a8dc;
    --explain-text: #4c1d95;

    --success: #16a34a;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --gold-bg: #fffbeb;
    --gold-border: #fde68a;

    --shadow-card: 0 2px 8px rgba(139, 92, 246, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-lift: 0 10px 30px rgba(139, 92, 246, 0.14), 0 2px 6px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 4px 14px rgba(139, 92, 246, 0.3);

    --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* Couleurs : thème sombre */
:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: linear-gradient(160deg, #0d0a1f 0%, #171031 45%, #200f2d 100%);
    --bg-color: #120d27;
    --halo-opacity: 0.32;

    --surface: #1b1535;
    --surface-glass: rgba(27, 21, 53, 0.76);
    --surface-soft: #231b45;
    --surface-tint: #2d2357;
    --border: #35296a;
    --border-strong: #5540a3;

    --text: #f3efff;
    --text-soft: #bdb6dc;
    --text-faint: #8f88b5;
    --label: #c4b5fd;
    --placeholder: #6f6796;
    --explain-text: #ddd6fe;

    --success: #4ade80;
    --danger: #fca5a5;
    --danger-bg: rgba(220, 38, 38, 0.14);
    --danger-border: rgba(248, 113, 113, 0.4);
    --gold-bg: rgba(245, 158, 11, 0.12);
    --gold-border: rgba(245, 158, 11, 0.45);

    --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-lift: 0 12px 34px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(139, 92, 246, 0.12);
    --shadow-glow: 0 4px 18px rgba(139, 92, 246, 0.45);
}

/* Reset & body */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    background: var(--bg-color);
    min-height: 100vh;
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

/* Fond : dégradé fixe et halos qui dérivent */
.backdrop {
    position: fixed; inset: 0; z-index: -1;
    background: var(--bg);
    overflow: hidden;
}
.halo {
    position: absolute;
    width: 60vmax; height: 60vmax;
    border-radius: 50%;
    opacity: var(--halo-opacity);
    will-change: transform;
    animation: drift 28s ease-in-out infinite alternate;
}
.halo-violet {
    top: -25vmax; left: -20vmax;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.55) 0%, rgba(139, 92, 246, 0) 65%);
}
.halo-pink {
    bottom: -30vmax; right: -20vmax;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.45) 0%, rgba(236, 72, 153, 0) 65%);
    animation-duration: 34s;
    animation-direction: alternate-reverse;
}
.halo-lilac {
    top: 30%; left: 45%;
    width: 40vmax; height: 40vmax;
    background: radial-gradient(circle, rgba(167, 139, 250, 0.4) 0%, rgba(167, 139, 250, 0) 65%);
    animation-duration: 40s;
    animation-delay: -12s;
}
@keyframes drift {
    from { transform: translate3d(-6%, -4%, 0) scale(1); }
    50% { transform: translate3d(8%, 6%, 0) scale(1.12); }
    to { transform: translate3d(-3%, 10%, 0) scale(0.95); }
}

.app-container { max-width: 800px; margin: 0 auto; padding: 20px; }

/* Apparitions */
@keyframes rise {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: none; }
}
@keyframes drop {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: none; }
}

/* Header */
.app-header {
    position: relative;
    text-align: center; padding: 8px 0 8px;
    animation: drop 0.6s var(--ease) both;
}
.header-actions {
    position: absolute; top: 8px; right: 0;
    display: flex; gap: 8px;
}
.logo { display: flex; align-items: center; justify-content: center; }
.logo-img {
    height: 64px;
    width: auto;
}
.logo-dark { display: none; }
[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: block; }
.app-tagline {
    margin-top: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--label);
    letter-spacing: 0.5px;
    opacity: 0.85;
}

.form-card, .side-section { animation: rise 0.6s var(--ease) both; }

/* Icônes */
.icon {
    width: 18px; height: 18px;
    fill: none; stroke: currentColor;
    stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
    flex-shrink: 0;
}
.icon-btn {
    position: relative;
    width: 36px; height: 36px;
    display: grid; place-items: center;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    background: var(--surface-glass);
    color: var(--label);
    cursor: pointer;
    transition: border-color 0.2s, transform 0.2s var(--ease), background 0.2s;
}
.icon-btn:hover { border-color: var(--violet); transform: translateY(-1px); }
.icon-btn:active { transform: scale(0.94); }

/* Bascule de thème : le soleil et la lune se relaient en tournant */
#theme-toggle .icon {
    position: absolute;
    transition: transform 0.5s var(--ease), opacity 0.3s;
}
.icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.5); }
[data-theme="dark"] .icon-sun { opacity: 1; transform: none; }
[data-theme="dark"] .icon-moon { opacity: 0; transform: rotate(90deg) scale(0.5); }

/* Cards */
.card {
    background: var(--surface-glass);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-card);
    transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s var(--ease);
}
.card:hover { box-shadow: var(--shadow-lift); }
.card-title { font-size: 22px; font-weight: 800; letter-spacing: -0.3px; }
.card-lead { color: var(--text-soft); font-size: 14px; margin-top: 2px; }

/* Buttons */
.btn-primary {
    position: relative; overflow: hidden;
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    width: 100%;
    background: linear-gradient(120deg, #8b5cf6, #ec4899, #8b5cf6);
    background-size: 200% 100%;
    color: white; border: none; border-radius: 12px;
    padding: 15px 32px; font-size: 16px; font-weight: 700;
    cursor: pointer; text-align: center;
    box-shadow: var(--shadow-glow);
    letter-spacing: 0.3px;
    transition: background-position 0.6s var(--ease), transform 0.2s var(--ease), box-shadow 0.25s;
}
/* Reflet qui traverse le bouton au survol */
.btn-primary::after {
    content: '';
    position: absolute; top: 0; bottom: 0; left: -60%;
    width: 40%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-20deg);
    transition: left 0.7s var(--ease);
}
.btn-primary:hover {
    background-position: 100% 0;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.45);
}
.btn-primary:hover::after { left: 120%; }
.btn-primary:active { transform: translateY(0) scale(0.985); }
.btn-primary:disabled {
    opacity: 0.6; cursor: not-allowed;
    transform: none; box-shadow: none;
}
.btn-primary.is-loading { opacity: 0.85; animation: flow 1.4s linear infinite; }
@keyframes flow { to { background-position: -200% 0; } }

.btn-outline {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    background: var(--surface-glass); color: var(--label);
    border: 1.5px solid var(--border); border-radius: 12px;
    padding: 15px 32px; font-size: 16px; font-weight: 700;
    cursor: pointer; text-align: center;
    transition: border-color 0.25s, background 0.25s, transform 0.2s var(--ease);
}
.btn-outline:hover {
    border-color: var(--violet);
    background: var(--surface-soft);
    transform: translateY(-2px);
}
.btn-outline:active { transform: scale(0.985); }

.btn-ghost {
    background: none; border: 1px solid var(--border); border-radius: 8px;
    padding: 6px 12px; font-size: 13px; font-weight: 600;
    color: var(--label); cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.btn-ghost:hover { border-color: var(--violet); background: var(--surface-soft); }
.btn-ghost.btn-danger { color: var(--danger); }
.btn-ghost.btn-danger:hover { border-color: var(--danger); background: var(--danger-bg); }

:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; }

/* Footer */
.app-footer {
    text-align: center;
    padding: 24px 0 16px;
    font-size: 12px;
    color: var(--text-faint);
}

/* Flash / Error */
.flash-error, .flash-info {
    padding: 10px 16px; border-radius: 10px;
    margin-bottom: 16px; font-size: 14px;
}
.flash-error {
    background: var(--danger-bg); border: 1px solid var(--danger-border);
    color: var(--danger);
    animation: shake 0.4s var(--ease);
}
.flash-info {
    background: var(--surface-tint); border: 1px solid var(--border-strong);
    color: var(--explain-text);
}
.error-message {
    background: var(--danger-bg); border: 1px solid var(--danger-border);
    color: var(--danger); padding: 16px; border-radius: 12px;
    text-align: center; margin-bottom: 16px;
    animation: shake 0.4s var(--ease);
}
@keyframes shake {
    25% { transform: translateX(-5px); }
    50% { transform: translateX(4px); }
    75% { transform: translateX(-2px); }
}

/* Message bref en bas d'écran */
.toast {
    position: fixed; left: 16px; right: 16px; bottom: 24px; z-index: 50;
    width: fit-content; margin: 0 auto;
    transform: translateY(20px);
    background: #1e1b4b; color: white;
    padding: 10px 18px; border-radius: 20px;
    font-size: 14px; font-weight: 600; text-align: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    opacity: 0; pointer-events: none;
    transition: opacity 0.25s, transform 0.35s var(--ease);
}
[data-theme="dark"] .toast { background: #f3efff; color: #1e1b4b; }
.toast.visible { opacity: 1; transform: none; }

/* Bloc dépliable */
.collapsible {
    display: grid; grid-template-rows: 0fr;
    opacity: 0;
    transition: grid-template-rows 0.4s var(--ease), opacity 0.3s;
}
.collapsible.open { grid-template-rows: 1fr; opacity: 1; }
.collapsible-inner { overflow: hidden; min-height: 0; }

/* Responsive */
@media (max-width: 600px) {
    .app-container { padding: 12px; }
    .logo-img { height: 48px; }
    .card { padding: 18px; }
    .card-title { font-size: 20px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .halo { animation: none; }
}