/* Amber Guard Laboratory. 0 байт JS. Нулевая зависимость от CDN. */

:root {
    --bg: #0a0a0b;
    --bg-soft: #111114;
    --bg-panel: #141418;
    --line: #1e1e24;
    --text: #d8d8dc;
    --text-dim: #8a8a92;
    --amber: #f4a261;
    --amber-dim: #a86a2d;
    --cyan: #4ec9b0;
    --cyan-dim: #2a7a6b;
    --red: #e06c75;
    --green: #98c379;
    --magenta: #c678dd;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Consolas, "Ubuntu Mono", monospace;
    --max-w: 1280px;
    --pad: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 19px;
    line-height: 1.6;
    min-height: 100vh;
    background-image:
        radial-gradient(ellipse at top, rgba(244, 162, 97, 0.04), transparent 60%),
        radial-gradient(ellipse at bottom, rgba(78, 201, 176, 0.03), transparent 60%);
    background-attachment: fixed;
}

a {
    color: var(--cyan);
    text-decoration: none;
}

a:hover {
    color: var(--amber);
    /* text-decoration: underline; */
    text-underline-offset: 3px;
}

code,
pre,
kbd,
samp {
    font-family: var(--font-mono);
    font-size: 0.92em;
}

code {
    color: var(--amber);
    padding: 0 6px;
    background: var(--bg-soft);
    border-radius: 3px;
    border: 1px solid var(--line);
}

pre {
    background: var(--bg-panel);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 16px;
    overflow-x: auto;
    color: var(--text);
}

/* ---------- HEADER ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(10, 10, 11, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 14px var(--pad);
    gap: 16px;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text);
    font-size: 15px;
    text-transform: uppercase;
}

.logo span {
    color: var(--amber);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 13px;
    flex-wrap: wrap;
}

.site-nav>a,
.site-nav .nav-drop>summary {
    padding: 8px 14px;
    color: var(--text-dim);
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: color .15s, border-color .15s;
}

.site-nav>a:hover,
.site-nav .nav-drop>summary:hover,
.site-nav .nav-drop[open]>summary {
    color: var(--amber);
    border-color: var(--line);
}

.nav-drop {
    position: relative;
}

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

.nav-drop-body {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--bg-panel);
    border: 1px solid var(--line);
    border-radius: 4px;
    min-width: 260px;
    padding: 8px 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    z-index: 20;
}

.nav-drop-body a {
    display: block;
    padding: 8px 16px;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 13px;
}

.nav-drop-body a:hover {
    color: var(--amber);
    background: rgba(244, 162, 97, 0.06);
    text-decoration: none;
}

.site-nav a.lang {
    color: var(--cyan);
    border: 1px solid var(--cyan-dim);
}

.site-nav a.lang:hover {
    background: rgba(78, 201, 176, 0.08);
    border-color: var(--cyan);
}

/* ---------- MAIN ---------- */
main {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: var(--pad);
}

main>section {
    padding: 30px 0;
    border-bottom: 1px solid var(--line);
}

main>section:last-child {
    border-bottom: none;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.2;
    color: var(--text);
}

h1 {
    font-size: clamp(32px, 5vw, 56px);
}

h2 {
    font-size: clamp(24px, 3.5vw, 36px);
    margin-bottom: 20px;
}

h3 {
    font-size: clamp(18px, 2.5vw, 22px);
    margin-bottom: 12px;
    color: var(--amber);
}

h4 {
    font-size: 15px;
    font-family: var(--font-mono);
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

p {
    margin-bottom: 14px;
    color: var(--text);
}

.section-label {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--amber-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 12px;
    display: inline-block;
    padding: 4px 10px;
    border: 1px solid var(--amber-dim);
    border-radius: 3px;
}

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 10px 20px;
    border: 1px solid var(--amber);
    color: var(--amber);
    border-radius: 3px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: all .15s;
}

.btn:hover {
    background: var(--amber);
    color: var(--bg);
    text-decoration: none;
}

.btn-ghost {
    border-color: var(--line);
    color: var(--text-dim);
}

.btn-ghost:hover {
    border-color: var(--cyan);
    color: var(--cyan);
    background: transparent;
}

/* ---------- FOOTER ---------- */
.site-footer {
    border-top: 1px solid var(--line);
    padding: 32px var(--pad);
    margin-top: 40px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-dim);
    text-align: center;
}

.footer-links {
    margin-bottom: 12px;
}

.footer-links a {
    margin: 0 10px;
}

.zero-js {
    opacity: 0.6;
    letter-spacing: 0.05em;
}

/* ---------- 404 ---------- */
.page-404 {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-family: var(--font-mono);
}

.page-404 h1 {
    font-size: clamp(80px, 20vw, 200px);
    color: var(--amber-dim);
    line-height: 1;
    letter-spacing: -0.05em;
}

.page-404 p {
    color: var(--text-dim);
    margin: 16px 0;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
    :root {
        --pad: 16px;
    }

    .site-header {
        flex-wrap: wrap;
    }

    .site-nav {
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
    }

    .site-nav>a,
    .site-nav .nav-drop>summary {
        white-space: nowrap;
        padding: 6px 10px;
        font-size: 12px;
    }

    main>section {
        padding: 48px 0;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 13px;
    }

    .site-nav {
        font-size: 11px;
    }

    h1 {
        font-size: 28px;
    }
}

@media (min-width: 1600px) {
    :root {
        --max-w: 1440px;
    }
}

/* Spec tables: factory / combat / corridor */
table.spec {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 12px;
    margin: 12px 0 16px;
}

table.spec th {
    text-align: left;
    color: var(--text-dim);
    font-weight: 500;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .08em;
    padding: 6px 10px;
    border-bottom: 1px solid var(--line);
}

table.spec td {
    padding: 6px 10px;
    border-bottom: 1px solid var(--line);
    color: var(--text);
}

table.spec td.val {
    color: var(--amber);
}

table.spec td.cor {
    color: var(--cyan);
}

.core-anchor-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0 8px;
}

article.core-line {
    padding: 24px 0;
    border-top: 1px dashed var(--line);
}

article.core-line:first-of-type {
    border-top: none;
}

article.core-line h3 {
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--text);
}

article.core-line h3 code {
    color: var(--cyan);
    background: none;
    border: none;
    padding: 0;
}

/* Full physics of a core line: zero-JS accordion */
details.core-full {
    margin: 10px 0 4px;
    border: 1px dashed var(--line);
    border-radius: 4px;
}

details.core-full summary {
    cursor: pointer;
    padding: 10px 14px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--cyan);
    list-style: none;
}

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

details.core-full summary::before {
    content: "+ ";
    color: var(--amber);
}

details.core-full[open] summary::before {
    content: "− ";
}

details.core-full .core-body {
    padding: 6px 16px 16px;
}

details.core-full h4 {
    margin: 14px 0 6px;
}

/* Full physics of a core line: text fades into the button. Zero JS. */
.core-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.core-full {
    position: relative;
    margin: 12px 0 4px;
}

.core-body {
    position: relative;
    max-height: 230px;
    overflow: hidden;
    padding: 4px 2px 0;
}

.core-body::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 150px;
    background: linear-gradient(180deg, rgba(10, 10, 11, 0) 0%, var(--bg) 80%);
    pointer-events: none;
    transition: opacity .25s ease;
}

.core-toggle:checked~.core-body {
    max-height: none;
    overflow: visible;
}

.core-toggle:checked~.core-body::after {
    opacity: 0;
}

.core-more-wrap {
    position: relative;
    display: flex;
    justify-content: flex-end;
    z-index: 2;
    text-align: center;
    margin-top: -20px;
}

.core-toggle:checked~.core-more-wrap {
    margin-top: 16px;
}

.core-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--amber);
    border: 1px solid var(--amber-dim);
    border-radius: 3px;
    padding: 9px 18px;
    background: rgba(10, 10, 11, 0.92);
    transition: border-color .15s, background .15s;
}

.core-more:hover {
    border-color: var(--amber);
    background: rgba(244, 162, 97, 0.08);
}

.core-more-close {
    display: none;
}

.core-toggle:checked~.core-more-wrap .core-more-open {
    display: none;
}

.core-toggle:checked~.core-more-wrap .core-more-close {
    display: inline;
}

.core-toggle:focus-visible~.core-more-wrap .core-more {
    outline: 2px solid var(--cyan);
    outline-offset: 2px;
}