/* ============================================================
   RedSpaceM — cyberpunk landing
   ============================================================ */

:root {
  --bg: #0a0a12;
  --bg-deep: #05050c;
  --panel: #0e0e1a;
  --panel-2: #121222;
  --cyan: #00f0ff;
  --magenta: #ff2bd6;
  --amber: #ffb300;
  --text: #e6e8f2;
  --text-dim: #8a90b5;
  --line: rgba(0, 240, 255, 0.18);
  --font-display: 'Orbitron', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'Share Tech Mono', ui-monospace, 'Cascadia Code', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--cyan); color: #000; }

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

/* ---------- background layers ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -3;
  background-image:
    linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  transform: perspective(600px) rotateX(12deg) scale(1.4);
  transform-origin: 50% 0;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
}

.bg-scanlines {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.22) 0px,
    rgba(0, 0, 0, 0.22) 1px,
    transparent 1px,
    transparent 3px
  );
  opacity: 0.5;
  mix-blend-mode: multiply;
}

.bg-glow {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(600px 380px at 15% 8%, rgba(0, 240, 255, 0.14), transparent 65%),
    radial-gradient(700px 450px at 85% 12%, rgba(255, 43, 214, 0.10), transparent 65%),
    radial-gradient(900px 600px at 50% 105%, rgba(255, 179, 0, 0.06), transparent 70%);
}

/* ---------- navbar ---------- */
.navbar {
  position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 10, 18, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.navbar.scrolled {
  background: rgba(5, 5, 12, 0.9);
  box-shadow: 0 6px 24px rgba(0, 240, 255, 0.08);
}

.nav-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 22px;
  height: 68px; display: flex; align-items: center; justify-content: space-between;
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  font-family: var(--font-display); font-weight: 900;
  color: var(--cyan); text-shadow: 0 0 12px var(--cyan);
  border: 1px solid var(--line); padding: 3px 7px;
  background: rgba(0, 240, 255, 0.06);
}
.logo-text {
  font-family: var(--font-display); font-weight: 700; letter-spacing: 0.08em;
  color: var(--text);
}
.logo-text em { font-style: normal; color: var(--magenta); }

.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-link {
  position: relative; color: var(--text-dim);
  font-size: 14px; letter-spacing: 0.14em; text-transform: uppercase;
  padding: 4px 0; transition: color 0.2s ease;
}
.nav-link::after {
  content: ''; position: absolute; left: 0; bottom: -2px; width: 0; height: 1px;
  background: var(--cyan); box-shadow: 0 0 8px var(--cyan);
  transition: width 0.25s ease;
}
.nav-link:hover { color: var(--cyan); }
.nav-link:hover::after { width: 100%; }
.nav-download {
  color: var(--cyan); border: 1px solid var(--line);
  padding: 8px 16px; background: rgba(0, 240, 255, 0.05);
  box-shadow: inset 0 0 18px rgba(0, 240, 255, 0.06);
}
.nav-download::after { display: none; }
.nav-download:hover {
  background: rgba(0, 240, 255, 0.16);
  box-shadow: 0 0 22px rgba(0, 240, 255, 0.35);
}

.nav-burger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 6px;
}
.nav-burger span { width: 24px; height: 2px; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 90px 22px 60px;
}
.hero-inner { max-width: 900px; width: 100%; position: relative; z-index: 2; }

.status-pill {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--line);
  background: rgba(10, 10, 18, 0.7);
  padding: 7px 16px; margin-bottom: 34px;
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.06);
}
.status-pill .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #666; box-shadow: 0 0 6px #666;
  transition: background 0.3s, box-shadow 0.3s;
}
.status-pill.online .dot { background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 1.6s infinite; }
.status-pill.offline .dot { background: var(--magenta); box-shadow: 0 0 10px var(--magenta); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* glitch title */
.glitch {
  font-family: var(--font-display);
  font-size: clamp(52px, 11vw, 132px);
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--text);
  text-shadow: 0 0 26px rgba(0, 240, 255, 0.35);
  position: relative;
  display: inline-block;
  animation: flicker 4s infinite steps(1);
}
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute; inset: 0;
  pointer-events: none;
}
.glitch::before {
  color: var(--cyan);
  clip-path: inset(0 0 60% 0);
  transform: translate(-3px, -2px);
  animation: glitch-a 3.2s infinite steps(2);
  opacity: 0.8;
}
.glitch::after {
  color: var(--magenta);
  clip-path: inset(55% 0 0 0);
  transform: translate(3px, 2px);
  animation: glitch-b 2.7s infinite steps(2);
  opacity: 0.8;
}

@keyframes glitch-a {
  0%, 86% { clip-path: inset(0 0 60% 0); transform: translate(-3px, -2px); }
  88% { clip-path: inset(18% 0 42% 0); transform: translate(4px, 1px); }
  92% { clip-path: inset(48% 0 12% 0); transform: translate(-5px, 2px); }
  96% { clip-path: inset(8% 0 70% 0); transform: translate(3px, -2px); }
  100% { clip-path: inset(0 0 60% 0); transform: translate(-3px, -2px); }
}
@keyframes glitch-b {
  0%, 88% { clip-path: inset(55% 0 0 0); transform: translate(3px, 2px); }
  90% { clip-path: inset(70% 0 5% 0); transform: translate(-4px, -1px); }
  94% { clip-path: inset(38% 0 30% 0); transform: translate(5px, 1px); }
  98% { clip-path: inset(64% 0 8% 0); transform: translate(-3px, 2px); }
  100% { clip-path: inset(55% 0 0 0); transform: translate(3px, 2px); }
}
@keyframes flicker {
  0%, 100% { opacity: 1; }
  41% { opacity: 1; }
  42% { opacity: 0.75; }
  43% { opacity: 1; }
  77% { opacity: 1; }
  78% { opacity: 0.6; }
  79% { opacity: 1; }
}

.hero-tag {
  font-family: var(--font-display);
  font-size: clamp(15px, 2.4vw, 22px);
  letter-spacing: 0.12em;
  margin-top: 26px;
  color: var(--text);
}
.accent-cyan { color: var(--cyan); text-shadow: 0 0 14px rgba(0, 240, 255, 0.6); }
.accent-magenta { color: var(--magenta); text-shadow: 0 0 14px rgba(255, 43, 214, 0.6); }
.accent-amber { color: var(--amber); text-shadow: 0 0 14px rgba(255, 179, 0, 0.5); }

.hero-sub {
  max-width: 640px; margin: 18px auto 0;
  color: var(--text-dim); font-size: 15px;
}

.hero-cta { display: flex; gap: 18px; justify-content: center; margin-top: 40px; flex-wrap: wrap; }

.btn {
  font-family: var(--font-display);
  font-size: 14px; letter-spacing: 0.16em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; cursor: pointer;
  border: 1px solid var(--cyan); color: var(--cyan);
  background: transparent; position: relative; overflow: hidden;
  transition: color 0.25s, background 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.btn::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent, rgba(0, 240, 255, 0.25), transparent);
  transform: translateX(-120%);
  transition: transform 0.6s ease;
}
.btn:hover::before { transform: translateX(120%); }
.btn:hover { box-shadow: 0 0 28px rgba(0, 240, 255, 0.35); }
.btn-icon { font-size: 16px; }

.btn-primary { background: rgba(0, 240, 255, 0.08); }
.btn-primary:hover { background: rgba(0, 240, 255, 0.18); }

.btn-ghost { border-color: var(--magenta); color: var(--magenta); }
.btn-ghost:hover { box-shadow: 0 0 28px rgba(255, 43, 214, 0.3); }

.hero-meta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 46px; }
.meta-chip {
  font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim); border: 1px solid var(--line);
  padding: 6px 12px; background: rgba(10, 10, 18, 0.5);
}

.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--text-dim); font-size: 11px; letter-spacing: 0.3em;
}
.scroll-line { width: 1px; height: 42px; background: var(--line); position: relative; overflow: hidden; }
.scroll-line::after {
  content: ''; position: absolute; top: -100%; left: 0; width: 100%; height: 100%;
  background: var(--cyan); box-shadow: 0 0 8px var(--cyan);
  animation: scroll-fall 1.8s ease-in-out infinite;
}
@keyframes scroll-fall {
  0% { top: -100%; }
  60%, 100% { top: 100%; }
}

/* ---------- sections ---------- */
.section { padding: 96px 22px; position: relative; z-index: 2; max-width: 1160px; margin: 0 auto; }
.section-alt {
  max-width: 100%;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(18, 18, 34, 0.35);
}

.section-head { text-align: center; margin-bottom: 54px; }
.section-eyebrow {
  color: var(--text-dim); font-size: 13px; letter-spacing: 0.35em;
  text-transform: uppercase; margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(26px, 4.5vw, 42px); letter-spacing: 0.06em;
}

/* ---------- features ---------- */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.feature-card {
  position: relative;
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  padding: 34px 28px;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.feature-card::before {
  content: attr(data-index);
  position: absolute; top: 10px; right: 16px;
  font-family: var(--font-display); font-weight: 900; font-size: 40px;
  color: transparent; -webkit-text-stroke: 1px rgba(0, 240, 255, 0.18);
}
.feature-card::after {
  content: ''; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  box-shadow: 0 0 12px var(--cyan);
  transition: width 0.35s ease;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 240, 255, 0.5);
  box-shadow: 0 10px 40px rgba(0, 240, 255, 0.14), inset 0 0 30px rgba(0, 240, 255, 0.04);
}
.feature-card:hover::after { width: 100%; }

.feature-icon {
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: var(--cyan);
  border: 1px solid var(--line); margin-bottom: 20px;
  background: rgba(0, 240, 255, 0.05);
  text-shadow: 0 0 10px var(--cyan);
  transition: box-shadow 0.25s, border-color 0.25s;
}
.feature-card:hover .feature-icon { border-color: var(--cyan); box-shadow: 0 0 16px rgba(0, 240, 255, 0.4); }

.feature-card h3 {
  font-family: var(--font-display); font-size: 17px; letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.feature-card p { color: var(--text-dim); font-size: 14px; }

/* ---------- architecture ---------- */
.arch {
  display: flex; align-items: center; justify-content: center;
  gap: 26px; flex-wrap: wrap; margin-bottom: 34px;
}
.arch-node {
  border: 1px solid var(--line); padding: 26px 34px; text-align: center;
  background: rgba(10, 10, 18, 0.7); position: relative;
  box-shadow: inset 0 0 26px rgba(0, 240, 255, 0.04);
}
.arch-node::before, .arch-node::after {
  content: ''; position: absolute; width: 8px; height: 8px; border: 1px solid var(--cyan);
}
.arch-node::before { top: -5px; left: -5px; border-right: 0; border-bottom: 0; }
.arch-node::after { bottom: -5px; right: -5px; border-left: 0; border-top: 0; }
.arch-client::before, .arch-client::after { border-color: var(--cyan); }
.arch-server::before, .arch-server::after { border-color: var(--magenta); }

.arch-label { font-family: var(--font-display); font-size: 16px; letter-spacing: 0.12em; color: var(--text); }
.arch-desc { color: var(--text-dim); font-size: 13px; margin-top: 8px; }
.arch-link {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  min-width: 150px; position: relative; padding: 8px 0;
}
.arch-line { width: 100%; height: 1px; background: linear-gradient(90deg, var(--cyan), var(--magenta)); box-shadow: 0 0 8px var(--cyan); }
.arch-pulse { color: var(--cyan); text-shadow: 0 0 12px var(--cyan); animation: pulse 1.4s infinite; font-size: 14px; }
.arch-caption { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-dim); }

.arch-note { text-align: center; max-width: 720px; margin: 0 auto; color: var(--text-dim); font-size: 14px; }
.arch-note a { border-bottom: 1px dashed var(--cyan); }

/* ---------- stack strip ---------- */
.stack-strip {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px;
}
.stack-item {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  padding: 26px 12px; border: 1px solid var(--line);
  background: rgba(10, 10, 18, 0.55);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.stack-item:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 179, 0, 0.5);
  box-shadow: 0 8px 30px rgba(255, 179, 0, 0.12);
}
.stack-cube {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 900; font-size: 18px;
  color: var(--amber);
  border: 1px solid rgba(255, 179, 0, 0.4);
  background: rgba(255, 179, 0, 0.05);
  text-shadow: 0 0 10px var(--amber);
  transform: rotate(45deg);
}
.stack-cube::first-letter { transform: rotate(-45deg); }
.stack-cube > span { display: inline-block; transform: rotate(-45deg); }
.stack-name { font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text); }

/* ---------- download ---------- */
.dl-panel {
  max-width: 900px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 30px; align-items: center;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  padding: 40px;
  box-shadow: 0 0 40px rgba(0, 240, 255, 0.06);
}
.version-badge { display: inline-flex; align-items: baseline; gap: 14px; margin-bottom: 16px; }
.v-label { font-size: 12px; letter-spacing: 0.25em; color: var(--text-dim); text-transform: uppercase; }
.v-value {
  font-family: var(--font-display); font-weight: 700; font-size: 28px;
  color: var(--cyan); text-shadow: 0 0 18px rgba(0, 240, 255, 0.6);
}
.dl-desc { color: var(--text-dim); font-size: 14px; }

.code-block {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--bg-deep); border: 1px solid var(--line);
  padding: 16px 18px; font-size: 15px; color: var(--text);
  box-shadow: inset 0 0 20px rgba(0, 240, 255, 0.05);
}
.copy-btn {
  background: none; border: 1px solid var(--line); color: var(--cyan);
  width: 34px; height: 34px; cursor: pointer; font-size: 15px;
  transition: box-shadow 0.2s, background 0.2s;
}
.copy-btn:hover { background: rgba(0, 240, 255, 0.12); box-shadow: 0 0 12px rgba(0, 240, 255, 0.4); }
.copy-btn.copied { border-color: var(--amber); color: var(--amber); }

.dl-actions { display: flex; gap: 14px; margin-top: 22px; flex-wrap: wrap; }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--line); background: var(--bg-deep);
  padding: 56px 22px 40px; position: relative; z-index: 2;
}
.footer-inner { max-width: 1160px; margin: 0 auto; display: flex; flex-direction: column; gap: 26px; align-items: center; text-align: center; }
.footer-logo { font-size: 20px; }
.footer-tag { color: var(--text-dim); font-size: 13px; margin-top: 8px; }
.footer-links { display: flex; gap: 26px; flex-wrap: wrap; justify-content: center; }
.footer-links a { color: var(--text-dim); font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; transition: color 0.2s; }
.footer-links a:hover { color: var(--cyan); }
.footer-copy { color: var(--text-dim); font-size: 12px; letter-spacing: 0.1em; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stack-strip { grid-template-columns: repeat(3, 1fr); }
  .dl-panel { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .nav-links {
    position: fixed; top: 68px; right: 0; left: 0;
    flex-direction: column; gap: 0; background: rgba(5, 5, 12, 0.97);
    border-bottom: 1px solid var(--line);
    transform: translateY(-140%); transition: transform 0.3s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links .nav-link { padding: 16px 22px; width: 100%; text-align: center; border-bottom: 1px solid rgba(0,240,255,0.06); }
  .nav-burger { display: flex; }
  .features-grid { grid-template-columns: 1fr; }
  .stack-strip { grid-template-columns: repeat(2, 1fr); }
  .arch { flex-direction: column; }
  .arch-link { min-width: 0; width: 100%; }
  .hero { min-height: 88vh; }
}