:root {
    --nuit: #150a2e;
    --nuit-2: #2a1052;
    --rose: #ff4fa3;
    --violet: #9b5cff;
    --cyan: #3ee6ff;
    --or: #ffd84d;
    --blanc: #fff7fd;
    --rumi: #b36bff;
    --mira: #ff4fa3;
    --zoey: #3ee6ff;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Baloo 2', 'Comic Sans MS', system-ui, sans-serif;
    color: var(--blanc);
    background: radial-gradient(ellipse at top, var(--nuit-2), var(--nuit) 70%);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* Étoiles scintillantes en fond */
.etoiles {
    position: fixed; inset: 0; pointer-events: none; z-index: 0;
    background-image:
        radial-gradient(2px 2px at 10% 20%, #fff, transparent),
        radial-gradient(1.5px 1.5px at 30% 70%, #fff, transparent),
        radial-gradient(2px 2px at 55% 15%, #ffd84d, transparent),
        radial-gradient(1.5px 1.5px at 75% 45%, #fff, transparent),
        radial-gradient(2px 2px at 90% 80%, #3ee6ff, transparent),
        radial-gradient(1.5px 1.5px at 20% 90%, #ff4fa3, transparent),
        radial-gradient(2px 2px at 65% 90%, #fff, transparent),
        radial-gradient(1.5px 1.5px at 45% 40%, #fff, transparent);
    animation: scintille 4s ease-in-out infinite alternate;
}
@keyframes scintille { from { opacity: .5; } to { opacity: 1; } }

header, main, footer { position: relative; z-index: 1; }

header { text-align: center; padding: 28px 16px 8px; }
.sur-titre { margin: 0; font-size: 1.1rem; color: var(--cyan); }
h1 {
    margin: 0; font-size: clamp(3rem, 12vw, 5.5rem); font-weight: 800; line-height: 1;
    background: linear-gradient(90deg, var(--rose), var(--violet), var(--cyan));
    -webkit-background-clip: text; background-clip: text; color: transparent;
    filter: drop-shadow(0 0 18px rgba(255, 79, 163, .55));
}
h1 span { color: var(--or); -webkit-text-fill-color: var(--or); display: inline-block; animation: brille 1.8s ease-in-out infinite alternate; }
@keyframes brille { to { filter: drop-shadow(0 0 12px var(--or)); } }
.sous-titre { margin: 4px 0 16px; font-size: 1.2rem; letter-spacing: .08em; text-transform: uppercase; opacity: .85; }

.equipe { display: flex; justify-content: center; gap: 18px; margin-bottom: 14px; }
.heroine { margin: 0; text-align: center; }
.heroine span {
    display: grid; place-items: center; width: 64px; height: 64px; border-radius: 50%;
    font-size: 2rem; background: var(--nuit); border: 3px solid currentColor;
    box-shadow: 0 0 16px currentColor; animation: flotte 3s ease-in-out infinite;
}
.heroine.mira span { animation-delay: .4s; }
.heroine.zoey span { animation-delay: .8s; }
.heroine figcaption { margin-top: 4px; font-weight: 700; }
.rumi { color: var(--rumi); } .mira { color: var(--mira); } .zoey { color: var(--zoey); }
@keyframes flotte { 50% { transform: translateY(-6px); } }

.bandeau { font-size: 1.25rem; font-weight: 700; margin: 8px 0 12px; }

.jauge {
    position: relative; max-width: 420px; height: 28px; margin: 0 auto;
    border-radius: 99px; background: rgba(255, 255, 255, .12); overflow: hidden;
}
.jauge-remplie { height: 100%; background: linear-gradient(90deg, var(--rose), var(--cyan)); transition: width .6s; }
.jauge span { position: absolute; inset: 0; display: grid; place-items: center; font-weight: 700; font-size: .95rem; }

/* Grille des cases */
.grille {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 14px; max-width: 900px; margin: 24px auto; padding: 0 16px;
}
.case {
    position: relative; aspect-ratio: 1; border: none; border-radius: 18px; cursor: pointer;
    font-family: inherit; color: var(--blanc);
    background: linear-gradient(145deg, var(--violet), var(--rose));
    box-shadow: 0 6px 0 rgba(0, 0, 0, .35), inset 0 0 0 3px rgba(255, 255, 255, .25);
    transition: transform .15s, box-shadow .15s;
}
.case:nth-child(3n) { background: linear-gradient(145deg, #3b7bff, var(--cyan)); }
.case:nth-child(4n) { background: linear-gradient(145deg, #ff7a3d, var(--or)); color: var(--nuit); }
.case.grande { grid-column: span 2; aspect-ratio: auto; background: linear-gradient(135deg, var(--rose), var(--violet), var(--cyan)); }
.numero { font-size: 2.6rem; font-weight: 800; text-shadow: 0 3px 0 rgba(0, 0, 0, .25); }
.cadenas { position: absolute; top: 8px; right: 10px; font-size: 1rem; }

.case.ouvrable { animation: appelle 1.6s ease-in-out infinite; }
.case.ouvrable:hover { transform: translateY(-4px) scale(1.04); }
@keyframes appelle { 50% { box-shadow: 0 6px 0 rgba(0,0,0,.35), 0 0 26px 6px rgba(255, 216, 77, .7); } }

.case.fermee { filter: grayscale(.6) brightness(.7); cursor: not-allowed; }
.case.ouverte { filter: none; opacity: .75; }
.case.ouverte::after { content: '⭐'; position: absolute; bottom: 6px; right: 10px; font-size: 1.3rem; }
.case.secoue { animation: secoue .4s; }
@keyframes secoue { 25% { transform: translateX(-6px) rotate(-3deg); } 75% { transform: translateX(6px) rotate(3deg); } }

/* Fenêtre de la surprise */
dialog {
    border: none; padding: 0; background: transparent; max-width: min(520px, 92vw); color: var(--blanc);
}
dialog::backdrop { background: rgba(10, 4, 25, .8); backdrop-filter: blur(4px); }
dialog[open] .carte { animation: apparait .45s cubic-bezier(.2, 1.4, .4, 1); }
@keyframes apparait { from { transform: scale(.4) rotate(-8deg); opacity: 0; } }
.carte {
    position: relative; padding: 28px 24px 22px; border-radius: 26px; text-align: center;
    background: linear-gradient(160deg, var(--nuit-2), var(--nuit));
    border: 3px solid var(--rose); box-shadow: 0 0 40px rgba(255, 79, 163, .6);
}
.carte.rumi { border-color: var(--rumi); box-shadow: 0 0 40px var(--rumi); }
.carte.mira { border-color: var(--mira); box-shadow: 0 0 40px var(--mira); }
.carte.zoey { border-color: var(--zoey); box-shadow: 0 0 40px var(--zoey); }
.fermer {
    position: absolute; top: 10px; right: 12px; width: 38px; height: 38px; border-radius: 50%;
    border: none; background: rgba(255, 255, 255, .15); color: inherit; font-size: 1.1rem; cursor: pointer;
}
.carte-jour { margin: 0; color: var(--cyan); font-weight: 700; }
.carte-emoji { font-size: 4.5rem; line-height: 1.2; }
.carte-titre { margin: 4px 0 10px; font-size: 1.7rem; line-height: 1.15; }
.carte-message { font-size: 1.15rem; line-height: 1.5; margin: 0 0 16px; }
.carte-defi { background: rgba(255, 255, 255, .1); border-radius: 16px; padding: 12px 16px; text-align: left; }
.carte-defi strong { color: var(--or); font-size: 1.1rem; }
.carte-defi p { margin: 6px 0 0; font-size: 1.1rem; line-height: 1.45; }
.carte-signature { margin: 14px 0 0; font-weight: 700; }

/* Confettis */
.confetti {
    position: fixed; top: -20px; z-index: 1000; pointer-events: none;
    font-size: 1.4rem; animation: tombe linear forwards;
}
@keyframes tombe { to { transform: translateY(110vh) rotate(720deg); } }

footer { text-align: center; padding: 16px 16px 32px; opacity: .7; }

@media (max-width: 480px) {
    .grille { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .numero { font-size: 2rem; }
    .heroine span { width: 54px; height: 54px; font-size: 1.6rem; }
}