/* Christopher M. Ackerman - Personal Website */

:root {
    --text-dark: #0f172a;
    --text-medium: #475569;
    --text-light: #64748b;
    --accent: #1d4ed8;
    --accent-hover: #1e3a8a;
    --accent-soft: #eff6ff;
    --accent-border: #bfdbfe;
    --background: #fefefe;
    --surface: #f8fafc;
    --border: #e2e8f0;
}

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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 17px;
    line-height: 1.65;
    color: var(--text-dark);
    background-color: var(--background);
    margin: 0;
    padding: 0;
}

::selection {
    background: var(--accent-border);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--accent-hover);
}

a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ---------- Navigation ---------- */

.site-nav {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(254, 254, 254, 0.85);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-top: 3px solid var(--accent);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 0.7rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-name {
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
}

.nav-name:hover {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-medium);
}

.nav-links a:hover {
    color: var(--accent);
}

/* ---------- Layout ---------- */

main {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    margin-top: 3rem;
    scroll-margin-top: 4.5rem;
}

/* ---------- Intro / hero ---------- */

.intro {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: center;
    padding: 3.25rem 0 0.5rem;
}

h1 {
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 2.6rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin: 0 0 1rem;
}

.intro-text p {
    margin: 0 0 0.9rem;
    color: var(--text-medium);
}

.intro-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1.4rem;
}

.button {
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 0.95rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--background);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-medium);
    transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.button:hover {
    color: var(--accent);
    border-color: var(--accent-border);
    background: var(--accent-soft);
}

.button-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

.button-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #ffffff;
}

.profile-pic {
    width: 200px;
    height: 230px;
    border-radius: 14px;
    object-fit: cover;
    object-position: center 25%;
    border: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

/* ---------- Section headings ---------- */

h2 {
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 1.7rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0 0 1.25rem;
    color: var(--text-dark);
}

h2::after {
    content: '';
    display: block;
    width: 28px;
    height: 2px;
    border-radius: 2px;
    background: var(--accent);
    margin-top: 0.4rem;
}

/* ---------- Publications ---------- */

.pub {
    padding: 1.3rem 0;
}

.pub + .pub {
    border-top: 1px solid var(--border);
}

.pub-title {
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 1.28rem;
    font-weight: 600;
    line-height: 1.35;
    margin: 0 0 0.4rem;
}

.pub-title a {
    color: var(--accent);
}

.pub-title a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
}

.badge {
    display: inline-block;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    line-height: 1.4;
    padding: 0.16rem 0.6rem;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-light);
    vertical-align: 0.18em;
    margin-left: 0.35rem;
    white-space: nowrap;
}

.badge-accent {
    background: var(--accent-soft);
    border-color: var(--accent-border);
    color: var(--accent-hover);
}

.pub-desc {
    margin: 0 0 0.7rem;
    color: var(--text-medium);
    font-size: 0.98rem;
}

.pub-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pub-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-medium);
    padding: 0.24rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--background);
    transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.pub-links a:hover {
    color: var(--accent);
    border-color: var(--accent-border);
    background: var(--accent-soft);
}

.pub-links a span {
    font-size: 0.8em;
    opacity: 0.7;
}

/* ---------- Contact ---------- */

#contact p {
    color: var(--text-medium);
    margin: 0 0 1.1rem;
}

.contact-email {
    font-weight: 600;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

/* ---------- Footer ---------- */

.site-footer {
    border-top: 1px solid var(--border);
    margin-top: 3.5rem;
    padding: 1.4rem 1.5rem;
    text-align: center;
}

.site-footer p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ---------- Responsive ---------- */

@media (max-width: 700px) {
    .intro {
        grid-template-columns: 1fr;
        gap: 1.75rem;
        padding-top: 2.25rem;
    }

    .profile-pic {
        order: -1;
        margin: 0 auto;
        width: 160px;
        height: 180px;
    }

    h1 {
        font-size: 2.05rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .pub-title {
        font-size: 1.18rem;
    }
}

@media (max-width: 480px) {
    .nav-name {
        display: none;
    }

    .nav-inner {
        justify-content: center;
    }
}

/* ---------- Print ---------- */

@media print {
    .site-nav,
    .intro-actions,
    .contact-links,
    .site-footer {
        display: none;
    }

    a {
        color: #000;
    }

    .profile-pic {
        display: none;
    }

    .pub-links a {
        border: none;
        padding: 0;
    }
}