:root {
    --color-bg: #f4f6f8;
    --color-surface: #ffffff;
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-accent: #3b6ea5;
    --color-accent-hover: #2f5883;
    --color-border: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
    --radius: 10px;
    --max-width: 720px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.5;
}

.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.banner-decoration {
    height: 28px;
    background-image: url("/bannerloop.png");
    background-repeat: repeat-x;
    background-size: auto 100%;
}

.header-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.75rem 1.25rem 1.25rem;
    text-align: center;
}

.site-header h1 {
    margin: 0 0 0.75rem;
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.site-nav {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav-link {
    display: inline-block;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.nav-link:hover {
    color: var(--color-accent);
    background: rgba(59, 110, 165, 0.08);
}

.nav-link.is-active {
    color: var(--color-accent);
    background: rgba(59, 110, 165, 0.12);
    font-weight: 600;
}

.content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem 1.25rem 2.5rem;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
}

.card + .card {
    margin-top: 1.25rem;
}

.card-title {
    margin: 0 0 1rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.link-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.75rem;
    margin-right: 0.5rem;
    padding: 0.65rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.link-button:hover {
    background: rgba(59, 110, 165, 0.06);
    border-color: rgba(59, 110, 165, 0.25);
}

.page-intro {
    margin: 0 0 1.25rem;
    color: var(--color-text-muted);
}

.contact-line {
    margin: 0 0 1.25rem;
}

.contact-line a {
    color: var(--color-accent);
    text-decoration: none;
}

.contact-line a:hover {
    text-decoration: underline;
}

.file-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.5rem;
}

.file-list a {
    display: block;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    text-decoration: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
}

.file-list a:hover {
    border-color: rgba(59, 110, 165, 0.35);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.file-list a::before {
    content: "PDF";
    display: inline-block;
    margin-right: 0.65rem;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    background: rgba(59, 110, 165, 0.1);
    color: var(--color-accent);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    vertical-align: middle;
}

.project-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.5rem;
}

.project-list a {
    display: block;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    text-decoration: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
}

.project-list a:hover {
    border-color: rgba(59, 110, 165, 0.35);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}