* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 20px;
    font-family: Arial, sans-serif;
    background: linear-gradient(180deg, #001326 0%, #000000 100%);
    color: #ffffff;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* 🎄 Kleineres Weihnachtsbanner */
.xmas-banner {
    width: 100%;
    padding: 20px 10px;   /* kleiner als vorher */
    text-align: center;
    background: linear-gradient(135deg, #8b0000, #b30000, #d40000);
    border-bottom: 3px solid gold;
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.4);
}

.xmas-banner h1 {
    font-family: "Cinzel", serif;
    font-size: 2rem;      /* kleinere Schrift */
    color: gold;
    margin: 0;
    letter-spacing: 2px;
    text-shadow: 
        0 0 6px rgba(255, 0, 0, 0.6),
        0 0 12px rgba(255, 215, 0, 0.7);
}


/* ✨ Glitzernde Schrift */
.glitter-text {
    font-family: "Cinzel", serif;
    font-size: 3.2rem;
    color: gold;
    letter-spacing: 3px;
    position: relative;
    animation: glitter 2.5s infinite linear;
    text-shadow:
        0 0 10px rgba(255, 215, 0, 0.7),
        0 0 20px rgba(255, 215, 0, 0.8),
        0 0 30px rgba(255, 215, 0, 0.9);
}


header {
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    margin: 0 0 8px 0;
    letter-spacing: 2px;
}

.hint {
    margin: 0;
    font-size: 14px;
    opacity: 0.9;
}

.calendar {
    display: grid;
    grid-template-columns: repeat(6, minmax(80px, 1fr));
    gap: 12px;
    max-width: 900px;
    margin: 0 auto;
}

.door {
    position: relative;
    width: 100%;
    padding-top: 120%;
    perspective: 900px;
}

.door-inner {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    transition: transform 0.8s ease;
}

.door-front,

.door-back {
    position: absolute;
    inset: 0;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    backface-visibility: hidden;
    box-shadow: 0 0 12px rgba(0, 0, 0, 0.6);
}

.door-front {
    background: #8b0000 url("img/door.svg") center/cover no-repeat;
    border: 2px solid rgba(255, 215, 0, 0.7);
}

.door-number {
    font-size: 26px;
    font-weight: 700;
    text-shadow: 0 0 8px rgba(0, 0, 0, 0.8);
}

.door-back {
    background: rgba(255, 255, 255, 0.95);
    color: #000000;
    transform: rotateY(180deg);
    padding: 10px;
    font-size: 14px;
    line-height: 1.3;
    text-align: center;
}

.door.opened .door-inner {
    transform: rotateY(180deg);
}

.door.opened .door-front {
    cursor: default;
}

.footer-text {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    opacity: 0.8;
}

#snow-container {
    pointer-events: none;
    position: fixed;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.snowflake {
    position: absolute;
    top: -10px;
    font-size: 8px;
    opacity: 0.8;
    filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.8));
    animation-name: snow-fall;
    animation-timing-function: linear;
    animation-iteration-count: 1;
}

@keyframes snow-fall {
    0% {
        transform: translateY(-10px);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    100% {
        transform: translateY(110vh);
        opacity: 0;
    }
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    .calendar {
        grid-template-columns: repeat(4, minmax(70px, 1fr));
    }

    .door-back {
        font-size: 12px;
    }
}