/* ============================================================
   ARENA/404 — SHAMSUL — industrial-brutalist-ui · tactile telemetry
   substrate: deactivated CRT / #0A0A0A · phosphor / #EAEAEA · hazard / #E61919
   ============================================================ */

:root {
  --bg: #0a0a0a;
  --panel: #111111;
  --fg: #eaeaea;
  --muted: #8a8a8a;
  --dim: #5a5a5a;
  --red: #e61919;
  --green: #4af626;
  --line: #262626;
  --font-disp: "Archivo Black", "Archivo", sans-serif;
  --font-ss: "Archivo", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Space Mono", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; border-radius: 0 !important; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-ss);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.mono { font-family: var(--font-mono); }

a { color: inherit; text-decoration: none; }

::selection { background: var(--red); color: var(--bg); }

/* ————— analog degradation ————— */
.noise {
  position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}
.scanlines {
  position: fixed; inset: 0; z-index: 9997; pointer-events: none; opacity: 0.5;
  background: repeating-linear-gradient(0deg, transparent 0 2px, rgba(0, 0, 0, 0.14) 2px 4px);
}

/* ============================================================
   MASTHEAD
   ============================================================ */
.masthead {
  position: sticky; top: 0; z-index: 100;
  display: grid; grid-template-columns: auto 1fr auto; align-items: stretch;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(4px);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.masthead > * { padding: 0.9rem 1.1rem; }
.brand { display: flex; gap: 1rem; border-right: 1px solid var(--line); white-space: nowrap; }
.brand-mark { color: var(--red); }
.brand-id { color: var(--muted); }
.nav { display: flex; align-items: center; gap: 0; justify-content: flex-start; overflow-x: auto; }
.nav a {
  padding: 0.9rem 1.1rem; border-left: 1px solid var(--line);
  transition: background 0.15s, color 0.15s; white-space: nowrap;
}
.nav a:hover { background: var(--fg); color: var(--bg); }
.nav-router { color: var(--red); }
.sys-status {
  display: flex; align-items: center; gap: 0.5rem;
  border-left: 1px solid var(--line); color: var(--green); white-space: nowrap;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50% !important; background: var(--green);
  animation: blink 1.6s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0.15; } }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  max-width: 1500px; margin: 0 auto;
  padding: 4rem clamp(1rem, 4vw, 3rem) 3rem;
  position: relative;
}
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; justify-content: space-between;
  font-size: 0.72rem; letter-spacing: 0.12em; color: var(--muted);
  text-transform: uppercase;
  padding-bottom: 1rem; border-bottom: 2px solid var(--line);
}
.hero-name {
  font-family: var(--font-disp);
  font-size: clamp(4.2rem, 17vw, 17rem);
  line-height: 0.85; letter-spacing: -0.04em;
  text-transform: uppercase; user-select: none;
}
.hero-name-alt {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3vw, 2.2rem);
  color: var(--muted); letter-spacing: 0.3em; margin-top: 0.4rem;
}
.hero-tagline {
  display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap;
  margin-top: 2rem; font-family: var(--font-disp);
  font-size: clamp(1.6rem, 5vw, 4.2rem); text-transform: uppercase;
  line-height: 1;
}
.strike {
  color: var(--dim); position: relative; display: inline-block;
}
.strike::after {
  content: ""; position: absolute; left: -2%; right: -2%; top: 52%; height: 6%;
  background: var(--red);
}
.arrow { color: var(--muted); font-family: var(--font-mono); font-size: 0.6em; }
.accent { color: var(--red); }
.hero-role {
  margin-top: 2.2rem; color: var(--muted); font-size: 0.78rem;
  letter-spacing: 0.12em; line-height: 1.9; text-transform: uppercase;
  padding-top: 1rem; border-top: 1px solid var(--line);
}

/* ============================================================
   SHEETS / GRID COMPARTMENTS
   ============================================================ */
.sheet { max-width: 1500px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 3rem); }
.sheet-head {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 1rem; flex-wrap: wrap;
  padding: 1.2rem 0; border-top: 3px solid var(--fg); border-bottom: 1px solid var(--line);
}
.sheet-title {
  font-family: var(--font-disp); font-size: clamp(1.3rem, 4vw, 2.4rem);
  letter-spacing: 0.02em; text-transform: uppercase; white-space: nowrap;
}
.bracket { color: var(--red); }
.sheet-ref { font-size: 0.7rem; color: var(--muted); letter-spacing: 0.1em; text-transform: uppercase; }

.grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.cell {
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: clamp(1.2rem, 3vw, 2.4rem);
}
.cell-wide { grid-column: span 1; }
@media (min-width: 900px) {
  .grid { grid-template-columns: 2fr 1fr 1fr; }
  .cell:nth-child(1) { grid-column: span 2; }
  .cell:nth-child(2),
  .cell:nth-child(3) { }
  .cell:nth-child(4) { grid-column: span 3; }
}

.cell-label {
  font-size: 0.72rem; letter-spacing: 0.14em; color: var(--red);
  text-transform: uppercase; margin-bottom: 1rem;
}
.cell-big {
  font-family: var(--font-disp); font-size: clamp(1.6rem, 5vw, 3.6rem);
  line-height: 0.95; letter-spacing: -0.02em; text-transform: uppercase;
  margin-bottom: 1.2rem;
}
.cell-copy { color: var(--muted); max-width: 60ch; }

/* data lists */
.data div {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: 0.45rem 0; border-bottom: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.06em;
  text-transform: uppercase;
}
.data dt { color: var(--dim); }
.data dd { color: var(--fg); text-align: right; }
.data .ok { color: var(--green); }
.hero-name { position: relative; cursor: crosshair; }
.hero-name::after {
  content: "+";
  position: absolute;
  left: var(--cx, 10px); top: var(--cy, 10px);
  transform: translate(-50%, -50%);
  font-family: var(--font-mono); font-size: 18px; color: var(--red);
  pointer-events: none; opacity: 0.85; z-index: 2;
}

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tags li {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em;
  border: 1px solid var(--line); padding: 0.28rem 0.6rem; color: var(--muted);
  text-transform: uppercase;
}

/* ============================================================
   PROJECT
   ============================================================ */
.project { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.project-block {
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: clamp(1.2rem, 3vw, 2.4rem);
}
@media (max-width: 900px) { .project { grid-template-columns: 1fr; } }

.project-index { font-size: 0.72rem; color: var(--red); letter-spacing: 0.14em; text-transform: uppercase; }
.project-spec { font-size: 0.68rem; color: var(--dim); letter-spacing: 0.1em; text-transform: uppercase; margin-top: 0.4rem; }
.project-name {
  font-family: var(--font-disp); font-size: clamp(2.6rem, 9vw, 7rem);
  line-height: 0.9; letter-spacing: -0.03em; text-transform: uppercase;
  margin: 1.4rem 0 0.4rem;
}
.project-sub { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.16em; color: var(--red); text-transform: uppercase; }
.project-copy { margin-top: 1.4rem; color: var(--muted); max-width: 62ch; }

.diagram {
  font-family: var(--font-mono); font-size: 0.68rem; line-height: 1.45;
  color: var(--fg); overflow-x: auto;
  background: var(--panel); border: 1px solid var(--line);
  padding: 1rem; margin: 0 0 1.2rem;
}
.diagram .red { color: var(--red); }
.project-meta { display: flex; flex-direction: column; justify-content: flex-end; }

/* ============================================================
   CONTACT LINKS
   ============================================================ */
.links { border-top: 1px solid var(--line); }
.link {
  display: grid; grid-template-columns: 3rem 1fr auto 2rem; align-items: center;
  gap: 1rem; padding: 1.2rem clamp(0.4rem, 2vw, 1.4rem);
  border-bottom: 1px solid var(--line);
  transition: background 0.15s, color 0.15s;
}
.link:hover { background: var(--fg); color: var(--bg); }
.link-num { color: var(--red); font-size: 0.75rem; }
.link-name { font-family: var(--font-disp); font-size: clamp(1.3rem, 4vw, 2.6rem); letter-spacing: -0.01em; text-transform: uppercase; }
.link-url { font-size: 0.72rem; color: var(--muted); letter-spacing: 0.06em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.link:hover .link-url { color: var(--bg); }
.link-go { font-size: 1.2rem; }
.link:hover .link-num, .link:hover .link-go { color: var(--red); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  max-width: 1500px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 1.5rem;
  padding: 1.6rem clamp(1rem, 4vw, 3rem) 2.6rem;
  font-size: 0.68rem; color: var(--dim); letter-spacing: 0.1em; text-transform: uppercase;
}
.footer p { line-height: 1.8; }
.footer .accent { color: var(--red); }
.barcode {
  width: 120px; height: 28px;
  background-image:
    repeating-linear-gradient(90deg, var(--fg) 0 2px, transparent 2px 5px, var(--fg) 5px 6px, transparent 6px 11px, var(--fg) 11px 12px, transparent 12px 15px, var(--fg) 15px 19px, transparent 19px 22px);
  opacity: 0.5;
}

/* ============================================================
   RESPONSIVE DENSITY
   ============================================================ */
@media (max-width: 760px) {
  .masthead { grid-template-columns: 1fr auto; }
  .nav { grid-column: 1 / -1; order: 3; border-top: 1px solid var(--line); }
  .nav a { flex: 1; text-align: center; border-left: 0; border-right: 1px solid var(--line); }
  .sys-status { padding: 0.7rem 1rem; }
  .grid { grid-template-columns: 1fr; }
  .grid .cell:nth-child(n) { grid-column: span 1; }
  .link { grid-template-columns: 2rem 1fr auto; }
  .link-url { display: none; }
  .footer { grid-template-columns: 1fr; }
  .barcode { display: none; }
}