/* ========================================
   sarahdocs.com
   Cyanotype palette: blueprint blue on paper
   ======================================== */

:root {
    color-scheme: light dark;

    --color-bg: #F4F5F2;              /* paper */
    --color-bg-alt: #FBFBF9;          /* surface */
    --color-text: #15202B;            /* ink */
    --color-text-secondary: #57626C;
    --color-text-primary: var(--color-text); /* alias used on the Work page */
    --color-accent: #1C4A73;          /* cyanotype */
    --color-accent-hover: #0F3354;
    --color-on-accent: #FFFFFF;
    --color-border: #D3D8DA;
    --color-nav-bg: #F4F5F2;

    --font-display: 'Instrument Serif', Georgia, 'Times New Roman', serif;
    --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-xxl: 6rem;

    --measure: 42rem;                 /* reading column, ~70 characters */
    --radius: 4px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0E1823;
        --color-bg-alt: #14212E;
        --color-text: #E4E8EB;
        --color-text-secondary: #9AA6B1;
        --color-accent: #8FB9DE;
        --color-accent-hover: #B7D3EC;
        --color-on-accent: #0E1823;
        --color-border: #253444;
        --color-nav-bg: #0E1823;
    }
}

/* ========================================
   Base
   ======================================== */

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

body {
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.65;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img {
    max-width: 100%;
    height: auto;
}

::selection {
    background: var(--color-accent);
    color: var(--color-on-accent);
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 2px;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.005em;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

h1 {
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    margin-bottom: var(--space-md);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-top: var(--space-xl);
}

h3 {
    font-size: 1.5rem;
    margin-top: var(--space-lg);
}

p {
    margin-bottom: var(--space-sm);
}

a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
    text-decoration-color: color-mix(in srgb, var(--color-accent) 40%, transparent);
    transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

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

ul, ol {
    margin: 0 0 var(--space-sm) 1.25rem;
}

li {
    margin-bottom: 0.35rem;
}

strong {
    font-weight: 600;
}

hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: var(--space-lg) 0;
}

code, pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

code {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.1em 0.35em;
}

pre {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-sm);
    overflow-x: auto;
    margin-bottom: var(--space-sm);
}

pre code {
    border: 0;
    padding: 0;
    background: none;
}

/* ========================================
   Navigation
   ======================================== */

.nav {
    background-color: var(--color-nav-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: calc(var(--measure) + 2 * var(--space-md));
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--space-md);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-text);
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
}

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

.nav-links a.active {
    color: var(--color-text);
    border-bottom-color: var(--color-accent);
}

/* ========================================
   Main
   ======================================== */

.main {
    min-height: calc(100vh - 200px);
    padding: var(--space-xl) 0 var(--space-xxl);
}

.container {
    max-width: calc(var(--measure) + 2 * var(--space-md));
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ========================================
   Home
   ======================================== */

.hero {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-lg);
    align-items: start;
    margin-bottom: var(--space-xl);
}

.hero h1 {
    font-size: clamp(3.25rem, 9vw, 5.25rem);
    line-height: 0.95;
    letter-spacing: -0.02em;
    margin: 0 0 var(--space-md);
}

.hero-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    margin-bottom: var(--space-lg);
}

.hero-lede {
    font-family: var(--font-display);
    font-size: 1.75rem;
    line-height: 1.25;
    margin-bottom: var(--space-md);
}

.hero-photo {
    width: 12rem;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    object-position: center 20%;
    border-radius: var(--radius);
    filter: grayscale(0.15);
}

.button {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-on-accent);
    padding: 0.7rem 1.4rem;
    border-radius: var(--radius);
    font-weight: 500;
    text-decoration: none;
    margin-top: var(--space-sm);
}

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

.home-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

/* Older intro styles, kept in case a page still uses them */
.intro { margin-bottom: var(--space-xl); }
.intro .subtitle { color: var(--color-text-secondary); }

/* ========================================
   Sections and cards
   ======================================== */

.section {
    margin-bottom: var(--space-xl);
}

.section h2 {
    margin-top: 0;
}

.card {
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-md);
    margin-bottom: var(--space-md);
}

.card h3 {
    margin-top: 0;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-lg) 0;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    text-decoration: none;
}

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

/* ========================================
   Resume PDF viewer
   ======================================== */

.pdf-container {
    margin: var(--space-lg) 0;
}

.pdf-container embed {
    display: block;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: var(--space-md);
}

/* ========================================
   Work and Philosophy page carousels
   These pages have their own <style> blocks with
   hardcoded light colors and shadows. The "main"
   prefix gives these rules enough weight to win,
   so the pages also work in dark mode.
   ======================================== */

main .carousel-item {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: none;
}

main .carousel::-webkit-scrollbar-track,
main .photo-carousel::-webkit-scrollbar-track {
    background: var(--color-border);
    border-radius: var(--radius);
}

main .carousel::-webkit-scrollbar-thumb,
main .photo-carousel::-webkit-scrollbar-thumb {
    border-radius: var(--radius);
}

main .photo-carousel-item img {
    border-radius: var(--radius);
    box-shadow: none;
}

/* Inline photo styles on the About and Work pages add shadows */
.container img {
    box-shadow: none !important;
}

/* Older auto-scrolling carousel */
.carousel-wrapper {
    overflow: hidden;
    margin: var(--space-lg) 0;
}

.carousel-track {
    display: flex;
    gap: var(--space-sm);
    animation: scroll 40s linear infinite;
}

.carousel-track:hover {
    animation-play-state: paused;
}

@keyframes scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ========================================
   Responsive and motion
   ======================================== */

@media (max-width: 700px) {
    .nav-container {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .nav-links {
        gap: var(--space-sm);
    }

    .hero {
        grid-template-columns: 1fr;
    }

    .hero-photo {
        grid-row: 1;
        width: 8rem;
    }

    .hero-lede {
        font-size: 1.5rem;
    }

    .pdf-container embed {
        height: 600px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}