:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --hover-glow: rgba(56, 189, 248, 0.15);
    --accent-blue: #38bdf8;
    --accent-purple: #c084fc;
    --accent-green: #4ade80;
    --accent-orange: #fb923c;
    --accent-pink: #f472b6;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Animated background mesh gradient */
.background-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background-image: 
        radial-gradient(at 10% 20%, rgba(56, 189, 248, 0.15) 0px, transparent 50%),
        radial-gradient(at 80% 10%, rgba(192, 132, 252, 0.15) 0px, transparent 50%),
        radial-gradient(at 40% 80%, rgba(74, 222, 128, 0.1) 0px, transparent 50%);
    animation: pulse 15s ease-in-out infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.05); opacity: 1; }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeInDown 0.8s ease-out;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Grid layout automatically adjusts cards based on screen size */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.app-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, var(--hover-glow) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.app-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.4);
}

.app-card:hover::before {
    opacity: 1;
}

.app-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    z-index: 1;
    transition: transform 0.3s ease;
}

.app-card:hover .app-icon {
    transform: scale(1.1);
}

.app-icon svg {
    width: 100%;
    height: 100%;
}

/* App-specific icon colors */
.nextcloud-icon { color: var(--accent-blue); }
.immich-icon { color: var(--accent-pink); }
.forgejo-icon { color: var(--accent-orange); }
.stalwart-icon { color: var(--accent-green); }
.keycloak-icon { color: var(--accent-purple); }

.app-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    z-index: 1;
}

.app-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    z-index: 1;
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .container {
        padding: 2rem 1rem;
    }
    
    header h1 {
        font-size: 2.2rem;
    }
    
    .app-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }

    .app-card {
        padding: 1.5rem;
    }
    
    .app-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 1rem;
    }

    .app-card h2 {
        font-size: 1.2rem;
    }
}