/* Modern Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #0f172a;
    /* Slate 900 */
    color: #f8fafc;
    /* Slate 50 */
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Background Effects */
.bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 15% 50%, rgba(79, 70, 229, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(14, 165, 233, 0.15), transparent 25%);
    z-index: -1;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}

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

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

p.subtitle {
    font-size: 1.25rem;
    color: #94a3b8;
    /* Slate 400 */
    max-width: 600px;
    margin: 0 auto;
}

/* Cards Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
    max-width: 900px;
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

/* Card Styles */
.card {
    background: rgba(30, 41, 59, 0.7);
    /* Slate 800 */
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    padding: 2.5rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.card:hover {
    transform: translateY(-5px);
    background: rgba(30, 41, 59, 0.9);
    border-color: rgba(99, 102, 241, 0.5);
    /* Indigo 500 */
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
}

.card-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease;
}

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

.card h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #f1f5f9;
}

.card p {
    color: #94a3b8;
    font-size: 1rem;
    margin-bottom: 2rem;
}

.card-link {
    margin-top: auto;
    color: #818cf8;
    /* Indigo 400 */
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.9;
    transition: opacity 0.2s;
}

.card:hover .card-link {
    opacity: 1;
}

.arrow {
    transition: transform 0.2s;
}

.card:hover .arrow {
    transform: translateX(4px);
}

/* Specific Card Colors */
.card.code33:hover .card-icon {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.2));
    color: #60a5fa;
}

.card.etf:hover .card-icon {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(5, 150, 105, 0.2));
    color: #34d399;
}

.card.fund:hover .card-icon {
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.2), rgba(139, 92, 246, 0.2));
    color: #a78bfa;
}

/* Footer */
footer {
    padding: 2rem;
    text-align: center;
    color: #475569;
    font-size: 0.875rem;
}

/* 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);
    }
}

/* Mobile Responsive */
@media (max-width: 640px) {
    h1 {
        font-size: 2.5rem;
    }

    .container {
        padding: 1rem;
    }
}