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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #000000;
    color: #ffffff;
    line-height: 1.6;
    font-size: 16px;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid #ffffff;
    z-index: 100;
}

.logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: #ffffff;
}

.logo span {
    color: #ffffff;
}

header nav a {
    color: #ffffff;
    margin-left: 1.5rem;
    font-size: 0.95rem;
    transition: opacity 0.2s;
}

header nav a:hover {
    opacity: 0.6;
}

/* Hero */
.hero {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 2rem 60px;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: #ffffff;
    max-width: 600px;
}

/* Cards Grid */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    padding: 0 2rem 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background: #000000;
    border: 1px solid #ffffff;
    border-radius: 12px;
    padding: 2rem;
    transition: background 0.2s, transform 0.2s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
}

.card h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #ffffff;
}

.card h2 .card-icon {
    font-size: 1.3rem;
    margin-left: 0.5rem;
}

.card p {
    color: #ffffff;
    font-size: 0.95rem;
    flex: 1;
}

.card .tag {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.3rem 0.8rem;
    background: transparent;
    color: #ffffff;
    border: 1px solid #ffffff;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    align-self: flex-start;
}

/* Detail Page */
.detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 120px 2rem 4rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: #ffffff;
    font-size: 0.95rem;
    margin-bottom: 2rem;
    transition: opacity 0.2s;
}

.back-link:hover {
    opacity: 0.6;
}

.detail h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.detail .subtitle {
    color: #ffffff;
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.detail section {
    margin-bottom: 2.5rem;
}

.detail section h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #ffffff;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #ffffff;
    display: inline-block;
}

.detail section p,
.detail section ul {
    color: #ffffff;
    line-height: 1.8;
}

.detail section ul {
    padding-left: 1.5rem;
}

.detail section li {
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: #ffffff;
    font-size: 0.85rem;
    border-top: 1px solid #ffffff;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .cards {
        grid-template-columns: 1fr;
        padding: 0 1rem 3rem;
    }

    .detail {
        padding: 100px 1rem 3rem;
    }

    .detail h1 {
        font-size: 1.6rem;
    }

    header {
        padding: 0 1rem;
    }
}