/* Core design tokens - Shona Starks Portfolio */
:root {
    /* Colour palette */
    --paper: #FAF9F7;
    /* warm paper background */
    --ink: #1F2937;
    /* charcoal/stone text */
    --muted: #6B7280;
    /* pencil grey */
    --card: #FFFFFF;
    /* white cards */

    /* Nature/heritage accents - Light green focus */
    --sage: #859F8E;
    /* main green accent */
    --sage-light: #A8C4B0;
    /* lighter sage */
    --sage-dark: #6B8B7A;
    /* darker sage */
    --terracotta: #C97A5C;
    /* warm accent */
    --ultramarine: #2F4F99;
    /* blue accent */
    --butter: #E8D48A;
    /* soft highlight */

    /* Type scale */
    --fs-0: clamp(14px, 1.3vw, 16px);
    --fs-1: clamp(16px, 1.5vw, 18px);
    --fs-2: clamp(18px, 2vw, 22px);
    --fs-3: clamp(22px, 3vw, 34px);

    /* Layout */
    --wrap: 1100px;
    --space-1: 8px;
    --space-2: 12px;
    --space-3: 16px;
    --space-4: 20px;
    --space-5: 28px;
    --space-6: 36px;

    /* Shape & depth */
    --radius: 18px;
    --radius-sm: 12px;
    --shadow: 0 8px 20px rgba(0, 0, 0, .06);
    --shadow-hover: 0 14px 28px rgba(0, 0, 0, .10);
    --hairline: rgba(31, 41, 55, .10);
}

/* Base styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    transition: box-shadow .18s cubic-bezier(.2, .6, .2, 1), background-color .18s, transform .18s;
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        transition: none !important;
    }
}

html {
    font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
    color: var(--ink);
    background: var(--paper);
    /* subtle paper wash using sage + terracotta tints */
    background-image:
        radial-gradient(1200px 600px at 50% -200px, rgba(133, 159, 142, .08), transparent),
        radial-gradient(800px 400px at 90% 10%, rgba(201, 122, 92, .05), transparent);
    background-attachment: fixed;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* Typography */
h1,
h2,
h3 {
    font-family: 'Fraunces', ui-serif, Georgia, "Times New Roman", serif;
    line-height: 1.25;
    letter-spacing: .2px;
    margin: 0 0 var(--space-2) 0;
}

h1 {
    font-size: var(--fs-3);
    font-weight: 600;
}

h2 {
    font-size: var(--fs-2);
    font-weight: 600;
}

h3 {
    font-size: var(--fs-1);
    font-weight: 600;
}

p {
    margin: var(--space-2) 0 var(--space-3) 0;
    font-size: var(--fs-0);
    line-height: 1.6;
}

/* Layout */
.wrap {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: var(--space-5) var(--space-4);
}

/* Header */
.site-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--hairline);
}

.site-nav a {
    display: inline-block;
    padding: var(--space-1) var(--space-2);
    border: 0;
    border-radius: 999px;
    text-decoration: none;
    color: inherit;
    font-weight: 500;
    transition: all .18s cubic-bezier(.2, .6, .2, 1);
}

.site-nav a:hover,
.site-nav a:focus {
    background: transparent;
    box-shadow: none;
    color: var(--sage-dark);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

/* Sections */
.section {
    margin: var(--space-6) 0 var(--space-5) 0;
}

.section-intro {
    color: var(--muted);
    font-size: var(--fs-1);
    margin-bottom: var(--space-4);
}

.lead {
    color: var(--muted);
    font-size: var(--fs-0);
}

/* Grid system */
.grid {
    display: grid;
    gap: var(--space-3);
}

.gallery {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-4);
}

/* Cards */
.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all .18s cubic-bezier(.2, .6, .2, 1);
    border: 1px solid rgba(0, 0, 0, .04);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.card img {
    display: block;
    width: 100%;
    height: auto;
    transition: transform .18s cubic-bezier(.2, .6, .2, 1);
}

.card:hover img {
    transform: scale(1.02);
}

.card figcaption {
    padding: var(--space-2);
    text-align: center;
    color: var(--muted);
    font-size: .9rem;
    letter-spacing: .2px;
    background: transparent;
    border-top: 1px solid var(--hairline);
    margin: 0;
    font-variant-numeric: oldstyle-nums;
}

/* Hero section */
.hero-card {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: var(--space-2);
    text-align: center;
    padding: var(--space-4);
    background: linear-gradient(to bottom, rgba(133, 159, 142, .06), rgba(255, 255, 255, .7));
    border: 1px solid rgba(0, 0, 0, .04);
}

.hero-card img {
    width: 100%;
    display: block;
    margin-bottom: var(--space-3);
}

.hero-subtitle {
    color: var(--muted);
    font-size: var(--fs-1);
    font-weight: 500;
    margin-bottom: var(--space-2);
    letter-spacing: .2px;
}

.hero-description {
    color: var(--ink);
    font-size: var(--fs-0);
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto var(--space-3);
}

.hero-card figcaption {
    font-size: var(--fs-2);
    font-weight: 600;
    color: var(--sage-dark);
    margin-bottom: var(--space-2);
}

/* Projects */
.project {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
    margin: var(--space-4) 0 var(--space-5) 0;
}

.project-media img {
    border-radius: var(--radius-sm);
    width: 100%;
    display: block;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0, 0, 0, .04);
}

.project-body .muted {
    color: var(--muted);
}

.project details summary {
    cursor: pointer;
    margin-top: var(--space-1);
    color: var(--ultramarine);
    font-weight: 500;
    transition: color .18s cubic-bezier(.2, .6, .2, 1);
}

.project details[open] summary {
    color: var(--terracotta);
}

.project details[open] {
    margin-top: var(--space-3);
}

/* Tools */
.tools {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    margin-top: var(--space-2);
}

.tool {
    background: var(--card);
    border: 1px solid rgba(0, 0, 0, .06);
    border-radius: 999px;
    padding: var(--space-1) var(--space-2);
    font-size: .9rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, .04);
    color: var(--sage-dark);
    font-weight: 500;
}

/* Contact */
.contact-list {
    list-style: none;
    padding: 0;
    margin: var(--space-2) 0 0;
}

.contact-list li {
    margin: var(--space-1) 0;
}

.contact-list a {
    color: var(--sage-dark);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color .18s cubic-bezier(.2, .6, .2, 1);
}

.contact-list a:hover {
    border-bottom-color: var(--sage);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--hairline);
    padding-top: var(--space-2);
    margin-top: var(--space-5);
    text-align: center;
    color: var(--muted);
}

/* Accessibility */
.skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.skip-link:focus {
    position: static;
    width: auto;
    height: auto;
    padding: var(--space-1);
    background: var(--card);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    outline: 2px solid var(--sage);
    outline-offset: 3px;
}

/* Decorative divider */
.divider-sawtooth {
    height: 10px;
    background:
        linear-gradient(-135deg, transparent 8px, var(--paper) 0) 0 0/24px 24px,
        linear-gradient(135deg, transparent 8px, var(--paper) 0) 12px 0/24px 24px,
        linear-gradient(to right, rgba(133, 159, 142, .55), rgba(133, 159, 142, .75), rgba(133, 159, 142, .55));
    margin: var(--space-6) 0;
}

/* Responsive */
@media (min-width: 860px) {
    .project {
        grid-template-columns: 1.1fr 1fr;
    }
}

/* Lightbox */
.zoomable {
    cursor: zoom-in;
}

.lightbox-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .8);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    z-index: 1000;
}

.lightbox-backdrop.open {
    display: flex;
}

.lightbox-backdrop img {
    max-width: 96vw;
    max-height: 92vh;
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
}

.lightbox-close {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    background: var(--card);
    border: 1px solid rgba(0, 0, 0, .08);
    border-radius: 999px;
    padding: var(--space-1) var(--space-2);
    cursor: pointer;
    font-weight: 500;
    color: var(--ink);
    transition: all .18s cubic-bezier(.2, .6, .2, 1);
}

.lightbox-close:hover {
    background: var(--sage-light);
    color: var(--ink);
}

/* Utility classes */
.small {
    font-size: .9rem;
}

.muted {
    color: var(--muted);
}

/* Focus styles */
*:focus {
    outline: 2px solid var(--sage);
    outline-offset: 3px;
}

/* Print styles */
@media print {
    .site-header {
        position: static;
    }

    body {
        background: white;
        color: black;
    }

    .lightbox-backdrop,
    .skip-link {
        display: none !important;
    }
}