/* ============================================================
   Murorebal — Blueprint / Architect Studio Theme
   Blueprint grid background, amber accent, monospace measurements.
   ============================================================ */

:root {
    --paper: #1a2332;
    --paper2: #12192a;
    --line: rgba(96, 165, 250, .13);
    --blueprint: #60a5fa;
    --blueprint-dim: rgba(96, 165, 250, .5);
    --amber: #f5a623;
    --amber2: #e8952c;
    --white: #eef4fd;
    --muted: #8aa3c0;
    --border: rgba(96, 165, 250, .25);
    --card: rgba(255,255,255,.045);
    --card-h: rgba(255,255,255,.08);
    --mono: "Consolas", "Courier New", monospace;
    --sans: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Arial, sans-serif;
    --max: 1160px;
}

* { box-sizing: border-box; margin: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--sans);
    background-color: var(--paper);
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 24px 24px;
    color: var(--white);
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--amber); text-decoration: none; }
a:hover { color: var(--blueprint); }

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

.container { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

.skip-link { position: absolute; left: -9999px; top: 0; background: var(--amber); color: var(--paper); padding: 10px 16px; z-index: 100; }
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */

.site-header { background: rgba(18, 25, 42, .88); backdrop-filter: blur(14px); border-bottom: 2px solid var(--border); position: sticky; top: 0; z-index: 50; }
.header-inner { display: flex; align-items: center; gap: 26px; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; border: 2px solid var(--blueprint); border-radius: 4px; background: transparent; }
.brand-text { font-family: var(--mono); font-size: 1.3rem; font-weight: 700; color: var(--white); letter-spacing: .02em; }
.brand-dot { color: var(--amber); }

.main-nav { display: flex; gap: 4px; margin-left: auto; }
.main-nav a { color: var(--muted); font-weight: 600; font-size: .86rem; font-family: var(--mono); padding: 8px 14px; border-radius: 3px; border: 1px solid transparent; transition: .15s; }
.main-nav a:hover { color: var(--blueprint); border-color: var(--border); background: var(--card); }
.header-actions { display: flex; gap: 10px; }

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 22px; border-radius: 3px; font-weight: 700; font-size: .88rem;
    font-family: var(--mono);
    border: 1px solid transparent; cursor: pointer; transition: .15s;
    line-height: 1.2; text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-lg { padding: 15px 30px; font-size: .96rem; }
.btn-block { width: 100%; }

.btn-solid { background: var(--amber); color: var(--paper); box-shadow: 0 3px 12px rgba(245, 166, 35, .3); }
.btn-solid:hover { background: var(--amber2); color: var(--paper); box-shadow: 0 5px 18px rgba(245, 166, 35, .4); }

.btn-outline { border-color: var(--border); color: var(--blueprint); background: var(--card); }
.btn-outline:hover { border-color: var(--blueprint); color: var(--white); background: var(--card-h); }

/* ---------- Hero ---------- */

.hero { padding: 84px 0 70px; position: relative; }
.hero-kicker { display: inline-block; font-family: var(--mono); font-size: .74rem; font-weight: 700; letter-spacing: .26em; text-transform: uppercase; color: var(--blueprint); margin-bottom: 20px; border: 1px solid var(--border); padding: 6px 14px; border-radius: 2px; }
.hero-title { font-size: 3rem; line-height: 1.1; font-weight: 800; letter-spacing: -.02em; margin: 0 0 20px; color: var(--white); }
.hero-title .accent { color: var(--amber); position: relative; }
.hero-lede { color: var(--muted); font-size: 1.1rem; max-width: 540px; margin: 0 0 30px; }
.hero-actions { display: flex; gap: 13px; flex-wrap: wrap; }
.hero-dim { margin-top: 40px; display: flex; gap: 30px; font-family: var(--mono); font-size: .78rem; color: var(--blueprint-dim); }
.hero-dim span::before { content: "— "; color: var(--amber); }

/* ---------- Sections ---------- */

.section { padding: 64px 0; }
.section-alt { background: var(--paper2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.kicker { display: inline-block; font-family: var(--mono); font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .24em; color: var(--blueprint); margin-bottom: 8px; }
.kicker::before { content: "// "; color: var(--amber); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-title { font-size: 2.2rem; font-weight: 800; letter-spacing: -.02em; margin: 0 0 10px; color: var(--white); }
.section-sub { color: var(--muted); max-width: 500px; margin: 0 auto; font-size: .98rem; }

/* ---------- Category tiles ---------- */

.room-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(235px, 1fr)); }
.room-card {
    background: var(--card); border: 1px solid var(--border); border-radius: 4px;
    padding: 26px 22px 22px; text-align: center; color: var(--white); display: block;
    transition: transform .16s ease, border-color .16s ease, background .16s ease;
    position: relative;
}
.room-card::before {
    content: ""; position: absolute; left: 12px; right: 12px; top: 0; height: 2px;
    background: var(--amber); opacity: 0; transition: opacity .16s;
}
.room-card:hover { transform: translateY(-4px); border-color: var(--blueprint); background: var(--card-h); text-decoration: none; }
.room-card:hover::before { opacity: 1; }
.room-icon { font-size: 1.9rem; display: block; margin-bottom: 10px; }
.room-name { font-size: 1.02rem; font-weight: 700; margin: 0 0 5px; letter-spacing: -.01em; }
.room-tag { font-family: var(--mono); font-size: .76rem; color: var(--muted); margin: 0; }

/* ---------- Guide cards ---------- */

.guide-list { display: grid; gap: 12px; }
.guide-row {
    background: var(--card); border: 1px solid var(--border); border-left: 3px solid var(--blueprint);
    padding: 18px 24px; display: flex; gap: 22px; align-items: center; justify-content: space-between;
    transition: border-left-color .15s, background .15s, transform .15s;
}
.guide-row:hover { border-left-color: var(--amber); background: var(--card-h); transform: translateY(-1px); }
.guide-name { font-size: 1.05rem; font-weight: 700; margin: 0 0 4px; letter-spacing: -.01em; }
.guide-name a { color: var(--white); }
.guide-name a:hover { color: var(--amber); }
.guide-desc { color: var(--muted); font-size: .86rem; margin: 0; }
.guide-side { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; flex-shrink: 0; }
.guide-cat { font-family: var(--mono); font-size: .66rem; font-weight: 700; text-transform: uppercase; letter-spacing: .16em; color: var(--blueprint); }
.guide-meta { font-family: var(--mono); font-size: .74rem; color: var(--muted); white-space: nowrap; }

/* ---------- Category head + article ---------- */

.breadcrumb { font-family: var(--mono); font-size: .8rem; color: var(--muted); margin: 22px 0 0; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--blueprint); }

.cat-head { padding: 42px 0 6px; text-align: center; }
.cat-icon { font-size: 2.5rem; display: block; margin-bottom: 8px; }
.cat-title { font-size: 2.4rem; font-weight: 800; letter-spacing: -.02em; margin: 0 0 8px; color: var(--white); }
.cat-tagline { font-family: var(--mono); color: var(--amber); font-size: .92rem; margin: 0; }

.two-col { display: grid; grid-template-columns: 2.1fr 1fr; gap: 32px; padding-top: 40px; padding-bottom: 68px; }

.article { background: var(--paper2); border: 1px solid var(--border); border-radius: 6px; padding: 44px 48px; }
.article-lede { font-size: 1.1rem; color: var(--blueprint); font-weight: 600; border-bottom: 1px dashed var(--border); padding-bottom: 16px; }
.article-title { font-size: 2.2rem; line-height: 1.14; letter-spacing: -.02em; margin: 10px 0 12px; color: var(--white); }
.article-heading { font-size: 1.28rem; font-weight: 700; margin: 36px 0 12px; color: var(--white); position: relative; padding-left: 16px; }
.article-heading::before { content: "▸"; position: absolute; left: 0; top: 2px; color: var(--amber); }
.article p { color: #b8cce3; margin: 0 0 15px; font-size: .96rem; }
.article ul, .article ol { margin: 0 0 15px; padding-left: 23px; color: #b8cce3; }
.article li { margin-bottom: 8px; }
.article a { color: var(--blueprint); border-bottom: 1px solid var(--blueprint-dim); }
.article a:hover { color: var(--amber); border-color: var(--amber); }

.guide-meta { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 24px; }
.meta-chip { font-family: var(--mono); font-size: .72rem; font-weight: 700; padding: 4px 12px; border-radius: 2px; background: var(--card); color: var(--blueprint); border: 1px solid var(--border); }
.meta-solid { background: var(--amber); color: var(--paper); border-color: var(--amber); }

/* ---------- Shelf (sidebar) ---------- */

.shelf { background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 26px 24px; position: sticky; top: 88px; }
.shelf-title { font-size: 1.05rem; font-weight: 700; margin: 0 0 2px; color: var(--white); }
.shelf-sub { font-family: var(--mono); font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; color: var(--amber); margin: 0 0 14px; }
.shelf-list { display: grid; gap: 2px; max-height: 560px; overflow-y: auto; padding-right: 4px; }
.shelf-item { display: block; padding: 11px 12px; border-radius: 3px; border-bottom: 1px solid rgba(96,165,250,.1); }
.shelf-item:hover { background: var(--card-h); }
.shelf-name { display: block; color: var(--white); font-size: .9rem; font-weight: 600; margin-bottom: 2px; }
.shelf-meta { display: block; font-family: var(--mono); font-size: .7rem; color: var(--muted); }

/* ---------- Videos ---------- */

.video-grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.video-card { background: var(--card); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; transition: transform .16s, border-color .16s; }
.video-card:hover { transform: translateY(-4px); border-color: var(--blueprint); }
.video-card img { width: 100%; display: block; aspect-ratio: 16 / 9; object-fit: cover; }
.video-body { padding: 16px 18px 20px; }
.video-kicker { font-family: var(--mono); font-size: .64rem; font-weight: 700; text-transform: uppercase; letter-spacing: .16em; color: var(--blueprint); }
.video-title { font-size: 1rem; font-weight: 700; margin: 7px 0 5px; letter-spacing: -.01em; }
.video-title a { color: var(--white); }
.video-title a:hover { color: var(--amber); }
.video-sub { color: var(--muted); font-size: .82rem; margin: 0; font-family: var(--mono); }

/* ---------- FAQ ---------- */

.faq-item { border-bottom: 1px dashed var(--border); padding: 16px 0; }
.faq-item h3 { font-size: .96rem; font-weight: 700; margin: 0 0 6px; color: var(--amber); font-family: var(--mono); }
.faq-item h3::before { content: "Q: "; color: var(--blueprint); }
.faq-item p { color: var(--muted); margin: 0; font-size: .9rem; }

/* ---------- Forms ---------- */

.form-card { max-width: 450px; margin: 0 auto; background: var(--paper2); border: 1px solid var(--border); border-radius: 6px; padding: 36px 34px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 700; margin-bottom: 6px; font-size: .8rem; font-family: var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--blueprint); }
.form-group input { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 3px; font-size: .94rem; background: var(--paper); font-family: inherit; color: var(--white); }
.form-group input:focus { outline: none; border-color: var(--blueprint); box-shadow: 0 0 0 3px rgba(96, 165, 250, .18); }
.form-note { text-align: center; color: var(--muted); font-size: .86rem; margin-top: 16px; }
.alert { padding: 12px 16px; border-radius: 3px; margin-bottom: 16px; font-size: .88rem; font-family: var(--mono); }
.alert-error { background: rgba(239, 68, 68, .12); color: #f87171; border: 1px solid rgba(239, 68, 68, .35); }
.alert-success { background: rgba(34, 197, 94, .1); color: #4ade80; border: 1px solid rgba(34, 197, 94, .3); }

/* ---------- Footer ---------- */

.site-footer { background: var(--paper2); border-top: 2px solid var(--amber); margin-top: 72px; padding: 48px 0 22px; }
.footer-grid { display: grid; gap: 32px; grid-template-columns: 1.5fr 1fr 1fr 1fr; }
.footer-brand .brand-text { color: var(--white); font-size: 1.2rem; }
.footer-tagline { color: var(--muted); font-size: .88rem; max-width: 280px; font-family: var(--mono); }
.footer-title { font-family: var(--mono); color: var(--blueprint); font-size: .9rem; font-weight: 700; margin: 0 0 10px; text-transform: uppercase; letter-spacing: .08em; }
.footer-col a { display: block; color: var(--muted); padding: 3px 0; font-size: .88rem; }
.footer-col a:hover { color: var(--amber); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; border-top: 1px dashed var(--border); margin-top: 36px; padding-top: 18px; color: var(--muted); font-size: .8rem; font-family: var(--mono); }
.footer-bottom a { color: var(--blueprint); }
.footer-bottom a:hover { color: var(--amber); }

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
    .two-col { grid-template-columns: 1fr; }
    .hero-title { font-size: 2.3rem; }
}

@media (max-width: 768px) {
    .main-nav { display: none; }
    .header-inner { gap: 12px; }
    .hero-title { font-size: 1.8rem; }
    .cat-title { font-size: 1.8rem; }
    .article-title { font-size: 1.6rem; }
    .article { padding: 26px 20px; }
    .guide-row { flex-direction: column; align-items: flex-start; }
    .guide-side { align-items: flex-start; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}