:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-eco: #10b981;
    --accent-struc: #3b82f6;
    --accent-presu: #f59e0b;
    --accent-crm: #8b5cf6;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
                radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.15), transparent 25%);
    animation: pulse 15s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.container {
    max-width: 1200px;
    width: 100%;
    padding: 2rem;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 4rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.grid-menu {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    text-decoration: none;
    color: var(--text-main);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    border-color: rgba(255,255,255,0.2);
}

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

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.eco { background: rgba(16, 185, 129, 0.1); color: var(--accent-eco); }
.struc { background: rgba(59, 130, 246, 0.1); color: var(--accent-struc); }
.presu { background: rgba(245, 158, 11, 0.1); color: var(--accent-presu); }
.crm { background: rgba(139, 92, 246, 0.1); color: var(--accent-crm); }

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    flex-grow: 1;
    margin-bottom: 2rem;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.card:hover .card-footer {
    color: #fff;
}

.card-footer i {
    transform: translateX(0);
    transition: transform 0.3s ease;
}

.card:hover .card-footer i {
    transform: translateX(5px);
}

/* Animations on load */
.card {
    animation: fadeInUp 0.6s ease-out backwards;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }

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

@media (max-width: 768px) {
    header h1 { font-size: 2.5rem; }
    .grid-menu { grid-template-columns: 1fr; }
}