/* --- VARIABLES GLOBALES --- */
:root {
    --bg-dark: #0d0f14;
    --bg-card: #151922;
    --accent: #4bd3ff;
    --accent-soft: rgba(75, 211, 255, 0.2);
    --text: #e8eef7;
    --text-soft: #99a1b3;
    --radius: 18px;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    --gradient: linear-gradient(135deg, #4bd3ff, #3a76ff);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Inter", sans-serif;
    background: var(--bg-dark);
    
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

a {
    color: var(--accent);
    text-decoration: none;
}

/* --- HERO --- */
.hero {
    padding: 90px 0 120px;
    text-align: center;
    background: radial-gradient(circle at top, #1a2030, #0d0f14 80%);
    position: relative;
}

.hero h1 {
    font-family: "Space Grotesk", sans-serif;
    font-size: 3rem;
    font-weight: 700;
}

.hero .subtitle {
    margin-top: 10px;
    color: var(--text-soft);
    font-size: 1.1rem;
}

/* --- COUNTDOWN --- */
.countdown {
    margin-top: 30px;
    display: flex;
    gap: 40px;
    justify-content: center;
}

.countdown-item span {
    font-size: 2.4rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    color: transparent;
}

.countdown small {
    display: block;
    margin-top: 4px;
    font-size: 0.9rem;
    color: var(--text-soft);
}

/* --- AUTH CARD --- */
.auth-section {
    margin-top: -60px;
    padding-bottom: 60px;
}

.auth-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.auth-card h2 {
    font-family: "Space Grotesk";
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.auth-form {
    margin-top: 25px;
    display: flex;
    gap: 12px;
    justify-content: center;
}

.modern-input {
    padding: 14px 18px;
    border-radius: var(--radius);
    border: 1px solid #2a2f3d;
    background: #0f121a;
    color: var(--text);
    width: 260px;
    font-size: 1rem;
    transition: 0.2s;
}

.modern-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.btn-primary {
    background: var(--gradient);
    padding: 14px 22px;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: #fff;
    font-size: 1rem;
    transition: 0.25s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(75, 211, 255, 0.25);
}

.features {
    margin-top: 30px;
    display: flex;
    gap: 20px;
    justify-content: center;
}

.feature {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-soft);
    font-size: 0.95rem;
}

.feature i {
    color: var(--accent);
}

/* --- ABOUT / CATEGORIES --- */
.about-section h2 {
    text-align: center;
    font-family: "Space Grotesk";
    margin-bottom: 40px;
}

.categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

.category-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: 0.25s;
}

.category-card:hover {
    transform: translateY(-4px);
}

.category-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.category-icon.dev {
    background: rgba(75, 211, 255, 0.15);
    color: var(--accent);
}

.category-icon.maker {
    background: rgba(255, 174, 0, 0.2);
    color: #ffae00;
}

.category-icon.design {
    background: rgba(255, 96, 195, 0.2);
    color: #ff60c3;
}

/* --- ADVENT GRID --- */
.advent-section {
    margin-top: 60px;
    text-align: center;
}

.calendar-grid {
    margin-top: 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 18px;
}

.calendar-grid .day {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 22px;
    font-size: 1.4rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.25s;
    border: 1px solid #1f232e;
}

.calendar-grid .day:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.advent-door {
    aspect-ratio: 1;
    background: var(--card-bg);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 3px solid transparent;
    box-shadow: 0 8px 25px var(--shadow-color);
}

.advent-door:hover:not(.locked):not(.opened) {
    transform: translateY(-10px) scale(1.05);
    border-color: var(--primary-color);
    box-shadow: 0 15px 40px rgba(171, 159, 242, 0.25);
}

.advent-door.locked {
    cursor: not-allowed;
    opacity: 0.6;
    filter: grayscale(0.3);
}

.advent-door.opened {
    background: linear-gradient(135deg, var(--pastel-green), var(--pastel-blue));
    color: white;
}

.advent-door .day-number {
    font-size: 3rem;
    font-weight: 700;
    font-family: 'Space Grotesk', sans-serif;
    margin-bottom: 10px;
}

.advent-door .day-title {
    font-size: 0.9rem;
    text-align: center;
    padding: 0 10px;
    font-weight: 500;
}

.advent-door.locked .day-number {
    color: var(--titre-color);
}

.advent-door.opened .day-number {
    color: white;
}

.advent-door .lock-icon {
    position: absolute;
    top: 15px;
    right: 15px;
    color: var(--titre-color);
    font-size: 1.2rem;
}

.advent-door.opened .lock-icon {
    display: none;
}

.advent-door.opened .check-icon {
    position: absolute;
    top: 15px;
    right: 15px;
    color: white;
    font-size: 1.5rem;
}

.today-hint {
    margin-top: 35px;
    color: var(--text-soft);
    font-size: 1rem;
    display: flex;
    gap: 10px;
    justify-content: center;
}

.today-hint i {
    color: var(--accent);
}

/* --- FOOTER --- */
footer {
    margin-top: 80px;
    padding: 50px 0;
    background: #0b0d12;
    font-size: 0.95rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: space-between;
}

.footer-brand h3 {
    font-family: "Space Grotesk";
}

.social a {
    margin-right: 12px;
    font-size: 1.2rem;
    color: var(--text-soft);
    transition: 0.2s;
}

.social a:hover {
    color: var(--accent);
}

.footer-bottom {
    flex-direction: column;
    display: flex;
    gap: 10px;
    margin-top: 40px;
    text-align: center;
    color: var(--text-soft);
}

.footer-bottom a {
    color: var(--accent);
}

/* --- RESPONSIVE --- */
@media (max-width: 700px) {
    .auth-form {
        flex-direction: column;
    }

    .countdown {
        gap: 20px;
    }

    .hero h1 {
        font-size: 2.4rem;
    }
}

/* Tombée de neige CSS */
.snowflakes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

.snowflake {
    position: absolute;
    background-color: #ffffff;
    border-radius: 50%;
    opacity: 0.8;
    animation-name: fall;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

/* Animation de chute */
@keyframes fall {
    0% {
        transform: translateY(-10px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}