:root {
    --bg-color: #0b0f19;
    --card-bg: rgba(23, 32, 54, 0.7);
    --card-border: rgba(99, 102, 241, 0.25);
    --card-hover-border: rgba(129, 140, 248, 0.6);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #6366f1;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --button-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --button-hover: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
}

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

body {
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", sans-serif;
    background: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #0b0f19 75%);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3rem 1.5rem 5rem;
    line-height: 1.6;
}

header {
    text-align: center;
    max-width: 800px;
    margin-bottom: 3.5rem;
}

.badge {
    display: inline-block;
    padding: 0.35rem 0.9rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #a5b4fc;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 9999px;
    margin-bottom: 1.25rem;
}

h1 {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.75rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
}

main.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    width: 100%;
    max-width: 1200px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    padding: 2rem 1.75rem 1.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient, var(--button-gradient));
    opacity: 0.8;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
    box-shadow: 0 20px 35px -12px rgba(99, 102, 241, 0.25);
}

.card-content {
    margin-bottom: 1.75rem;
}

.card-title {
    font-size: 1.45rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.85rem;
    letter-spacing: -0.01em;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.975rem;
    line-height: 1.65;
}

.card-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.card-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    background: var(--button-gradient);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 10px;
    box-shadow: 0 4px 14px var(--accent-glow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    width: 100%;
    text-align: center;
}

.card-btn:hover {
    background: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.card-btn svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
    transition: transform 0.2s ease;
}

.card-btn:hover svg {
    transform: translateX(3px);
}

@media (max-width: 640px) {
    h1 {
        font-size: 2.1rem;
    }
    main.card-grid {
        grid-template-columns: 1fr;
    }
}