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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #0f1117;
    color: #e0e0e0;
    line-height: 1.6;
}

a {
    color: #4fc3f7;
    text-decoration: none;
}

a:hover {
    color: #81d4fa;
    text-decoration: underline;
}

header {
    background: #1a1d2e;
    border-bottom: 1px solid #2a2d3e;
    padding: 0 2rem;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: #4fc3f7;
    letter-spacing: 0.05em;
}

nav a {
    margin-left: 1.5rem;
    font-size: 0.9rem;
    color: #b0bec5;
}

nav a:hover {
    color: #4fc3f7;
    text-decoration: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.hero {
    text-align: center;
    padding: 4rem 2rem;
    border-bottom: 1px solid #2a2d3e;
}

.hero h1 {
    font-size: 2.5rem;
    color: #4fc3f7;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.1rem;
    color: #90a4ae;
    max-width: 600px;
    margin: 0 auto;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.card {
    background: #1a1d2e;
    border: 1px solid #2a2d3e;
    border-radius: 8px;
    padding: 1.5rem;
    transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
    border-color: #4fc3f7;
    transform: translateY(-2px);
}

.card h3 {
    color: #4fc3f7;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.card p {
    color: #90a4ae;
    font-size: 0.9rem;
}

.card .tag {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.2rem 0.6rem;
    background: #0d47a1;
    border-radius: 4px;
    font-size: 0.75rem;
    color: #90caf9;
}

.page-title {
    font-size: 1.8rem;
    color: #4fc3f7;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #2a2d3e;
}

footer {
    margin-top: 4rem;
    padding: 1.5rem 2rem;
    border-top: 1px solid #2a2d3e;
    text-align: center;
    color: #546e7a;
    font-size: 0.85rem;
}