/* Web Fonts */
@font-face {
    font-family: 'Nostromo Bold';
    src: url('/assets/fonts/Great Scott - Nostromo Bold.otf') format('opentype');
    font-weight: bold;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Nostromo Medium';
    src: url('/assets/fonts/Great Scott - Nostromo Medium.otf') format('opentype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* Visual system */
:root {
    color-scheme: light;
    --color-page: #f3f0e8;
    --color-surface: #fffdf8;
    --color-surface-subtle: #eae5da;
    --color-text: #171a1c;
    --color-muted: #5b6267;
    --color-border: #2b3034;
    --color-border-subtle: #c9c2b5;
    --color-link: #075b91;
    --color-link-hover: #0a4267;
    --color-link-visited: #684575;
    --color-accent: #1469aa;
    --color-accent-subtle: #dcebf5;
    --color-status: #705000;
    --color-status-border: #bd8700;
    --color-status-surface: #fff1c9;
    --color-focus: #b5323b;
    --color-highlight: #ffe08a;
    --color-shadow: rgba(23, 26, 28, 0.15);
    --loading-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="0 0 40 40"><rect width="40" height="40" fill="%23ddd"/><text x="50%" y="50%" text-anchor="middle" dy="0.35em" font-family="Arial, sans-serif" font-size="12" fill="%23666">Loading...</text></svg>');
    --font-body: Georgia, 'Times New Roman', serif;
    --font-interface: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Nostromo Bold', sans-serif;
    --font-display-medium: 'Nostromo Medium', sans-serif;
    --content-width: 46rem;
    --layout-width: 75rem;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --color-page: #151718;
    --color-surface: #1e2123;
    --color-surface-subtle: #292d30;
    --color-text: #ece8df;
    --color-muted: #b9b3a8;
    --color-border: #777b7e;
    --color-border-subtle: #454a4e;
    --color-link: #76b9e6;
    --color-link-hover: #b8ddf4;
    --color-link-visited: #c7a0d3;
    --color-accent: #4f9ed2;
    --color-accent-subtle: #17354a;
    --color-status: #f3d57a;
    --color-status-border: #9b760f;
    --color-status-surface: #352d16;
    --color-focus: #ff6b74;
    --color-highlight: #6a5314;
    --color-shadow: rgba(0, 0, 0, 0.45);
    --loading-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="0 0 40 40"><rect width="40" height="40" fill="%23383c40"/><text x="50%" y="50%" text-anchor="middle" dy="0.35em" font-family="Arial, sans-serif" font-size="12" fill="%23c5c9cc">Loading...</text></svg>');
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        color-scheme: dark;
        --color-page: #151718;
        --color-surface: #1e2123;
        --color-surface-subtle: #292d30;
        --color-text: #ece8df;
        --color-muted: #b9b3a8;
        --color-border: #777b7e;
        --color-border-subtle: #454a4e;
        --color-link: #76b9e6;
        --color-link-hover: #b8ddf4;
        --color-link-visited: #c7a0d3;
        --color-accent: #4f9ed2;
        --color-accent-subtle: #17354a;
        --color-status: #f3d57a;
        --color-status-border: #9b760f;
        --color-status-surface: #352d16;
        --color-focus: #ff6b74;
        --color-highlight: #6a5314;
        --color-shadow: rgba(0, 0, 0, 0.45);
        --loading-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="0 0 40 40"><rect width="40" height="40" fill="%23383c40"/><text x="50%" y="50%" text-anchor="middle" dy="0.35em" font-family="Arial, sans-serif" font-size="12" fill="%23c5c9cc">Loading...</text></svg>');
    }
}

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

html {
    color: var(--color-text);
    background: var(--color-page);
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 15px;
    color: var(--color-text);
    background: var(--color-page);
    font-family: var(--font-body);
    line-height: 1.65;
}

::selection {
    color: var(--color-text);
    background: var(--color-highlight);
}

a {
    color: var(--color-link);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.16em;
}

a:visited {
    color: var(--color-link-visited);
}

a:hover {
    color: var(--color-link-hover);
    text-decoration-thickness: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 3px;
}

/* Header */
.site-header {
    margin-bottom: 20px;
    padding-bottom: 10px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.main-nav {
    position: relative;
}

.main-nav h1 {
    padding-right: 6.5rem;
}

.main-nav h1 {
    margin-top: unset;
}

.main-nav h1 a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 1.05rem;
    line-height: 1.2;
}

.main-nav h1 a:visited,
.main-nav h1 a:hover {
    color: var(--color-text);
}

.site-subtitle {
    margin: 0 0 5px 0;
    font-size: 0.75rem;
    color: var(--color-muted);
    font-style: italic;
    font-family: var(--font-display-medium);
    line-height: 1.2;
}

.nav-summary {
    position: absolute;
    top: 0;
    right: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 8px 12px;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-family: var(--font-interface);
    font-size: 0.875rem;
    font-weight: 700;
    line-height: 1;
    list-style: none;
    cursor: pointer;
}

.nav-summary::-webkit-details-marker {
    display: none;
}

.nav-summary::after {
    content: '+';
    font-size: 1.25rem;
    font-weight: 400;
    line-height: 0.8;
}

.nav-disclosure[open] .nav-summary {
    color: var(--color-link);
    background: var(--color-accent-subtle);
    border-color: var(--color-accent);
}

.nav-disclosure[open] .nav-summary::after {
    content: '−';
}

.nav-links-mobile {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border-subtle);
}

.nav-links-desktop {
    display: none;
}

.nav-item-about {
    margin-bottom: 12px !important;
}

.nav-group {
    margin: 0 !important;
    padding: 12px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.nav-group:last-child {
    padding-bottom: 0;
}

.nav-group-label {
    display: block;
    margin-bottom: 4px;
    color: var(--color-muted);
    font-family: var(--font-interface);
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.2;
    text-transform: uppercase;
}

.nav-group-links li {
    margin: 4px 0;
}

/* Heading Styles */
h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: bold;
    line-height: 1.2;
    letter-spacing: 0.015em;
}

main > h1,
main > h2,
main > h3,
main > p,
main > blockquote {
    max-width: var(--content-width);
}

main > h1:first-child {
    margin-top: 0;
}

blockquote {
    margin: 1.75rem 0;
    padding: 0.25rem 0 0.25rem 1.25rem;
    color: var(--color-muted);
    border-left: 4px solid var(--color-accent);
}

blockquote p {
    margin: 0;
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav ul li {
    display: block;
    margin: 5px 0;
}

.main-nav ul li a {
    color: var(--color-text);
    font-family: var(--font-interface);
    font-size: 16px;
    text-decoration-color: var(--color-border-subtle);
}

.main-nav ul li a[aria-current="page"],
.main-nav ul li a[aria-current="page"]:visited {
    color: var(--color-link);
    font-weight: bold;
    text-decoration: none;
    border-bottom: 3px solid var(--color-accent);
}

.main-nav ul li a:visited {
    color: var(--color-text);
}

.main-nav ul li a:hover {
    color: var(--color-link-hover);
    text-decoration-color: currentColor;
}

/* Footer */
.site-footer {
    margin-top: 30px;
    padding-top: 15px;
    color: var(--color-muted);
    border-top: 1px solid var(--color-border-subtle);
    font-family: var(--font-interface);
    text-align: center;
    font-size: 14px;
}

/* Search styles */
.header-utilities {
    display: none;
    gap: 10px;
    margin: 16px 0 0;
    padding-top: 16px;
    border-top: 1px solid var(--color-border-subtle);
}

.main-nav:has(.nav-disclosure[open]) .header-utilities {
    display: grid;
}

#search-container {
    position: relative;
    margin: 0;
}

#search-input {
    width: 100%;
    padding: 8px 12px;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-size: 14px;
    font-family: var(--font-interface);
}

#search-input::placeholder {
    color: var(--color-muted);
}

.theme-picker {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 8px;
    color: var(--color-muted);
    font-family: var(--font-interface);
    font-size: 0.75rem;
}

.theme-picker-label {
    font-weight: 600;
}

#theme-select {
    width: 100%;
    min-height: 38px;
    padding: 6px 28px 6px 8px;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-family: var(--font-interface);
    font-size: 0.875rem;
}

#search-results {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top: none;
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 8px 20px var(--color-shadow);
}

.search-result {
    padding: 10px;
    border-bottom: 1px solid var(--color-border-subtle);
}

.search-result:last-child {
    border-bottom: none;
}

.search-result h4 {
    margin: 0 0 5px 0;
    font-size: 14px;
}

.search-result h4 a {
    color: var(--color-link);
    text-decoration: underline;
}

.search-result p {
    margin: 0;
    font-size: 12px;
    color: var(--color-muted);
    line-height: 1.4;
}

.search-result mark {
    color: var(--color-text);
    background: var(--color-highlight);
    padding: 1px 2px;
}

.search-no-results,
.search-error {
    padding: 10px;
    text-align: center;
    color: var(--color-muted);
    font-size: 12px;
}

/* Page navigation */
.page-nav {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-subtle);
    text-align: right;
}

.page-nav-link {
    color: var(--color-link);
    font-family: var(--font-interface);
    text-decoration: underline;
    font-size: 14px;
}

.page-nav-link:hover {
    text-decoration: none;
}

/* Revision status */
.revision-notice {
    max-width: var(--content-width);
    margin: 20px 0 30px;
    padding: 14px 16px;
    color: var(--color-text);
    background: var(--color-status-surface);
    border: 1px solid var(--color-status-border);
    border-left-width: 5px;
}

.revision-notice p {
    margin: 0;
}

.revision-notice-label {
    margin-bottom: 4px;
    color: var(--color-status);
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
}

.revision-notice time {
    white-space: nowrap;
}

/* Board placemat */
.board-placemat {
    width: 100%;
    max-width: 1000px;
    margin: 30px auto;
}

.board-placemat a {
    display: block;
}

.board-placemat img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    box-shadow: 0 0 0 1px var(--color-border-subtle);
}

.board-placemat figcaption {
    margin-top: 5px;
    color: var(--color-muted);
    font-size: 14px;
    text-align: center;
}

/* Header anchors */
.header-anchor {
    color: var(--color-muted);
    text-decoration: none;
    margin-left: 5px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

h1:hover .header-anchor,
h2:hover .header-anchor,
h3:hover .header-anchor,
h4:hover .header-anchor,
h5:hover .header-anchor,
h6:hover .header-anchor {
    opacity: 1;
}

.header-anchor:hover {
    color: var(--color-link-hover);
    text-decoration: none;
}

/* Cards Grid Styles */
.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin: 30px 0;
}

.card-item {
    display: flex;
    justify-content: center;
}

.card-spoiler-button {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 0;
    padding: 0;
    border: 0;
    background: none;
    cursor: pointer;
    font: inherit;
}

.card-spoiler-button.is-revealed {
    cursor: default;
}

.card-item img {
    width: 100%;
    height: auto;
    max-width: 300px;
    display: block;
    transition: opacity 0.3s;
}

/* Lazy loading styles */
.card-item img.lazyload {
    opacity: 0;
    background: var(--color-surface-subtle);
    min-height: 200px;
}

.card-item img.lazyloading {
    opacity: 1;
    background: var(--color-surface-subtle) var(--loading-image) center center no-repeat;
}

.card-item img.lazyloaded {
    opacity: 1;
    background: none;
}

/* Desktop styles */
@media (min-width: 768px) {
    body {
        margin: 0;
        padding: 0;
    }
    
    .site-header {
        margin-bottom: 25px;
        padding: 15px 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
    }
    
    .main-nav {
        max-width: var(--layout-width);
        margin: 0 auto;
        padding: 0 20px;
    }
    
    main {
        max-width: var(--layout-width);
        margin: 0 auto;
        padding: 0 20px;
    }
    
    .site-footer {
        max-width: var(--layout-width);
        margin: 40px auto 0;
        padding: 20px 20px 0;
    }
    
    .main-nav {
        display: block;
    }

    .main-nav h1 {
        padding-right: 0;
    }

    .nav-disclosure {
        display: none;
    }
    
    .main-nav h1 a {
        font-size: 1.25rem;
    }
    
    .site-subtitle {
        font-size: 0.8rem;
        font-family: var(--font-display-medium);
    }
    
    #search-container {
        width: 200px;
        margin: 0;
    }

    .header-utilities {
        position: absolute;
        top: 0;
        right: 20px;
        display: flex;
        align-items: center;
        gap: 12px;
        margin: 0;
        padding-top: 0;
        border-top: 0;
    }

    .theme-picker {
        display: flex;
    }

    #theme-select {
        width: 96px;
    }
    
    .nav-links-desktop {
        display: flex;
        flex-wrap: wrap;
        align-items: baseline;
        gap: 10px 16px;
        width: 100%;
        margin-top: 5px;
    }

    .nav-links-desktop > li {
        margin: 0;
    }

    .nav-links-desktop .nav-item-about {
        margin: 0 !important;
    }

    .nav-links-desktop .nav-group {
        display: flex;
        align-items: baseline;
        gap: 10px;
        min-width: 0;
        padding: 0 0 0 16px;
        border-top: 0;
        border-left: 1px solid var(--color-border-subtle);
    }

    .nav-links-desktop .nav-group-label {
        margin-bottom: 0;
        white-space: nowrap;
    }

    .nav-links-desktop .nav-group-links {
        display: flex;
        flex-wrap: wrap;
        gap: 0 14px;
    }

    .nav-links-desktop .nav-group-links li {
        display: inline;
        margin: 0;
    }
    
    .main-nav ul li {
        display: inline;
        margin: 0 15px 0 0;
    }
    
    .main-nav ul li a {
        font-size: 14px;
    }
    
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

}

@media (min-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 20px;
    }
    
    .card-item img {
        max-width: 200px;
    }

    .card-spoiler-button {
        max-width: 200px;
    }
}