:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --accent-color: #38bdf8;
    --accent-gradient: linear-gradient(135deg, #38bdf8, #818cf8);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(129, 140, 248, 0.15) 0px, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

/* HEADER */
header {
    text-align: center;
    padding: 80px 20px 40px;
    animation: fadeInDown 0.8s ease-out;
}

header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    max-width: 600px;
    margin: 0 auto;
}

/* CONTAINER */
.container {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    padding: 40px;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
}

/* CARD */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 40px;
    text-align: left;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out both;
}

.card:nth-child(2) {
    animation-delay: 0.2s;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(56, 189, 248, 0.4);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card > * {
    position: relative;
    z-index: 1;
}

/* TEXT */
.card h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 24px;
}

.card strong {
    color: var(--accent-color);
    font-weight: 600;
}

/* BIG BUTTON */
.btn {
    margin-top: auto;
    padding: 16px 24px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card:hover .btn {
    background: var(--accent-gradient);
    border-color: transparent;
    box-shadow: 0 8px 16px rgba(56, 189, 248, 0.2);
}

/* 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 */
@media (max-width: 640px) {
    .container {
        padding: 20px;
        grid-template-columns: 1fr;
    }

    .card {
        padding: 30px;
    }

    header {
        padding: 60px 20px 20px;
    }
}