:root {
    --primary: #1b4965;
    --primary-hover: #15384d;

    --background: #f3f5f7;
    --surface: #ffffff;

    --text: #2d3748;
    --text-light: #718096;

    --border: #dfe4ea;

    --radius: 12px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;

    font-family:
        "Segoe UI",
        system-ui,
        sans-serif;

    background: var(--background);
    color: var(--text);

    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */

.hero {
    background: white;
    border-bottom: 1px solid var(--border);
    text-align: center;

    padding: 3rem 1rem 2rem;
}

.hero img {
    max-width: 280px;
    width: 100%;
    height: auto;
}

.tagline {
    margin-top: 1rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Main Content */

main {
    padding: 3rem 0;
}

section {
    margin-bottom: 3rem;
}

h2 {
    color: var(--primary);
    margin-bottom: 1rem;
}

h3 {
    margin-top: 0;
    color: var(--primary);
}

/* Archive Cards */

.archive-card {
    background: var(--surface);

    border: 1px solid var(--border);
    border-radius: var(--radius);

    padding: 2rem;

    box-shadow: var(--shadow);
}

/* Buttons */

.button-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;

    margin-top: 1.5rem;
}

.button {
    display: inline-block;

    padding: 0.85rem 1.5rem;

    text-decoration: none;
    font-weight: 600;

    color: white;
    background: var(--primary);

    border-radius: 8px;

    transition:
        background 0.2s ease,
        transform 0.2s ease;
}

.button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.button.secondary {
    background: #6b7280;
}

.button.secondary:hover {
    background: #4b5563;
}

/* Footer */

footer {
    border-top: 1px solid var(--border);

    background: white;

    margin-top: 4rem;
    padding: 2rem 0;
}

footer p {
    margin: 0;

    text-align: center;
    color: var(--text-light);
}

/* Mobile */

@media (max-width: 768px) {

    .button-group {
        flex-direction: column;
    }

    .button {
        text-align: center;
    }

    .archive-card {
        padding: 1.5rem;
    }

}