:root {
    color-scheme: light;
    --bg: #ffffff;
    --surface: #ffffff;
    --surface-soft: #fafafa;
    --ink: #0f0f10;
    --ink-soft: #6b6b70;
    --line: #d4d4d4;
    --line-strong: #c0c0c0;
    --accent: #2f4ad0;
    --accent-soft: #eef1fc;
    --ok: #1f9d55;
    --ok-soft: #e7f6ec;
    --bad: #c53030;
    --bad-soft: #fdecec;
    --shadow-card: 0 8px 24px -12px rgba(15, 15, 16, 0.18);
    --shadow-focus: 0 0 0 4px rgba(15, 15, 16, 0.06);
    --shadow-toplink: 0 4px 14px -6px rgba(15, 15, 16, 0.12);
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0c0c0e;
    --surface: #141418;
    --surface-soft: #1c1c21;
    --ink: #f5f5f7;
    --ink-soft: #9b9ba3;
    --line: #2e2e35;
    --line-strong: #44444c;
    --accent: #7c8fff;
    --accent-soft: #1c2244;
    --ok: #4ade80;
    --ok-soft: #102a1a;
    --bad: #f87171;
    --bad-soft: #2c1414;
    --shadow-card: 0 8px 24px -8px rgba(0, 0, 0, 0.6);
    --shadow-focus: 0 0 0 4px rgba(124, 143, 255, 0.18);
    --shadow-toplink: 0 4px 14px -6px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    letter-spacing: -0.005em;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-weight: 600; letter-spacing: -0.025em; line-height: 1.05; }

.page {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
    padding: 20px 0 80px;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 100;
    padding: 8px 16px;
    border-radius: 0 0 8px 8px;
    background: var(--ink);
    color: var(--bg);
    text-decoration: none;
}
.skip-link:focus { left: 0; }

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    margin-bottom: 32px;
}

.brand, .nav-actions, .nav-tag, .breadcrumb a, .card-top, .card-foot span {
    display: inline-flex;
    align-items: center;
}
.brand {
    gap: 10px;
    color: var(--ink);
    font-weight: 600;
    text-decoration: none;
}
.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--ink);
    color: var(--bg);
    font-size: 14px;
}
.nav-actions { gap: 12px; }
.nav-tag {
    gap: 6px;
    padding: 4px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--ink-soft);
    font-size: 0.78rem;
}

.theme-toggle {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--surface-soft);
    color: var(--ink);
    cursor: pointer;
    font-size: 14px;
}
.theme-toggle:hover, .theme-toggle:focus-visible {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
    outline: 0;
}
.theme-toggle-icon { display: none; }
[data-theme="dark"] .theme-toggle-icon-light { display: inline-block; }
:root:not([data-theme="dark"]) .theme-toggle-icon-dark { display: inline-block; }

.breadcrumb { margin-bottom: 16px; }
.breadcrumb a {
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--ink-soft);
    text-decoration: none;
    font-size: 0.9rem;
}
.breadcrumb a:hover, .breadcrumb a:focus-visible {
    color: var(--accent);
    border-color: var(--accent);
    outline: 0;
}

.hero {
    max-width: 880px;
    padding: 16px 0 56px;
}
.eyebrow {
    margin-bottom: 8px;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}
.hero h1 {
    margin-bottom: 12px;
    font-size: clamp(2.2rem, 7vw, 5rem);
}
.hero p {
    color: var(--ink-soft);
    font-size: 1.1rem;
}

.search-wrap {
    display: flex;
    justify-content: center;
    margin-bottom: 32px;
}
.hero-search {
    position: relative;
    width: 100%;
    max-width: 520px;
}
.hero-search-input {
    width: 100%;
    height: 56px;
    border: 1px solid var(--line-strong);
    border-radius: 14px;
    background: var(--surface);
    color: var(--ink);
    font: inherit;
    padding: 10px 18px 10px 52px;
}
.hero-search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--ink-soft);
}
.hero-search-input:focus {
    border-color: var(--ink);
    box-shadow: var(--shadow-focus);
    outline: 0;
}

.projects-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    margin-bottom: 18px;
}
.projects-head h2 { font-size: clamp(1.3rem, 2vw, 1.6rem); }
.projects-count {
    color: var(--ink-soft);
    font-size: 0.9rem;
}
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
    padding: 0;
    margin: 0;
    list-style: none;
}
.card a {
    display: flex;
    min-height: 100%;
    flex-direction: column;
    gap: 22px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
    color: var(--ink);
    text-decoration: none;
    transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}
.card a:hover, .card a:focus-visible {
    transform: translateY(-2px);
    border-color: var(--ink);
    box-shadow: var(--shadow-card);
    outline: 0;
}
.card-top {
    justify-content: space-between;
    gap: 12px;
}
.card-icon {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 18px;
}
.card a:hover .card-icon, .card a:focus-visible .card-icon {
    background: var(--accent);
    color: var(--bg);
}
.card-num, .card-arrow { color: var(--ink-soft); }
.card-body { display: grid; gap: 8px; }
.card-tag {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.card-title { font-size: clamp(1.5rem, 2.5vw, 1.85rem); }
.card-desc { color: var(--ink-soft); }
.card-foot {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
}
.card-foot span {
    gap: 6px;
    color: var(--ink-soft);
    font-size: 0.86rem;
}
.empty {
    color: var(--ink-soft);
    text-align: center;
    margin-top: 24px;
}

.foot {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 72px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    color: var(--ink-soft);
}

@media (max-width: 760px) {
    .page { width: min(100% - 28px, 1120px); }
    .grid { grid-template-columns: 1fr; }
    .hero-search-input { height: 52px; }
}