/* FONT */
@font-face {
    font-family: 'TemelYazi';
    src: url('TemelYazi.otf') format('opentype');
    font-weight: normal;
    font-style: normal;
}

.font-temel {
    font-family: 'TemelYazi', sans-serif;
}

/* YILDIZLAR VE UZAY */
body {
    background: radial-gradient(circle at center, #0f172a 0%, #000000 100%);
}

.stars {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: transparent url('http://assets.iceable.com/img/noise-transparent.png') repeat 0 0;
    animation: bg-animation 60s infinite linear;
    opacity: 0.1;
    z-index: 0;
    pointer-events: none;
}

@keyframes bg-animation {
    0% { transform: translate(0,0); }
    100% { transform: translate(-100px, -100px); }
}

.group-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border-radius: 1.5rem;
    color: white;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border-bottom: 6px solid rgba(0,0,0,0.3);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.group-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

.group-card:active {
    transform: translateY(2px);
    border-bottom-width: 2px;
}

.planet-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.5));
}

.group-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.group-chars {
    font-family: 'TemelYazi', sans-serif;
    font-size: 1.2rem;
    opacity: 0.9;
    letter-spacing: 2px;
}

/* MENÜ AKTİVİTE BUTONLARI */
.activity-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border-radius: 1rem;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
    transition: all 0.2s;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    background-image: linear-gradient(to bottom right, var(--tw-gradient-from), var(--tw-gradient-to));
    border: 2px solid rgba(255,255,255,0.1);
}

.activity-btn:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.activity-btn:active {
    transform: scale(0.95);
}

/* ANİMASYONLAR */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.animate-float {
    animation: float 4s ease-in-out infinite;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}
.animate-shake {
    animation: shake 0.4s;
}