/* =========================================
   NexusCode Landing Page
   ========================================= */

:root {
  --bg: #050c18;
  --bg2: #071020;
  --bg3: #0a1828;
  --fg: #e8eef4;
  --fg2: #8fa3b8;
  --accent: #00e5ff;
  --accent-dim: rgba(0, 229, 255, 0.12);
  --accent-glow: rgba(0, 229, 255, 0.25);
  --warn: #ffb800;
  --warn-dim: rgba(255, 184, 0, 0.15);
  --danger: #ff4d4d;
  --green: #00e87a;
  --card: #0a1a2e;
  --border: rgba(0, 229, 255, 0.12);
  --font-display: 'Chakra Petch', monospace;
  --font-body: 'DM Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(5, 12, 24, 0.85);
  backdrop-filter: blur(20px);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.05em;
}
.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--fg2);
  font-family: var(--font-display);
  letter-spacing: 0.05em;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 100px 40px 60px;
  position: relative;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,229,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 80%);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13px;
  font-family: var(--font-display);
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}
.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}
.hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 5.5vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero-text h1 em {
  font-style: normal;
  color: var(--accent);
}
.hero-sub {
  font-size: 17px;
  color: var(--fg2);
  max-width: 460px;
  line-height: 1.65;
  margin-bottom: 40px;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-val {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
}
.stat-label { font-size: 12px; color: var(--fg2); letter-spacing: 0.04em; text-transform: uppercase; }
.stat-div { width: 1px; height: 36px; background: var(--border); }

/* HERO VISUAL */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-end;
}
.phone-frame {
  position: relative;
  width: 280px;
  background: #0d1f35;
  border-radius: 36px;
  padding: 14px;
  border: 1px solid rgba(0,229,255,0.2);
  box-shadow:
    0 0 0 1px rgba(0,229,255,0.08),
    0 20px 60px rgba(0,0,0,0.6),
    0 0 80px rgba(0,229,255,0.08);
}
.phone-notch {
  width: 80px;
  height: 24px;
  background: #071020;
  border-radius: 0 0 14px 14px;
  margin: 0 auto 10px;
}
.phone-screen {
  background: #050c18;
  border-radius: 22px;
  overflow: hidden;
  position: relative;
  min-height: 500px;
}
.scan-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: scanmove 3s ease-in-out infinite;
  z-index: 2;
}
@keyframes scanmove {
  0% { top: 0; opacity: 1; }
  100% { top: 100%; opacity: 0.3; }
}
.scan-overlay {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.scan-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.scan-icon { opacity: 0.8; }
.pulse { animation: blink 1s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.2; } }

.code-block { display: flex; flex-direction: column; gap: 8px; }
.code-row {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.code-row.code-warn { border-color: rgba(255,184,0,0.2); background: rgba(255,184,0,0.05); }
.code-prefix {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}
.code-desc { font-size: 11px; color: var(--fg2); }

.severity-bar { display: flex; flex-direction: column; gap: 6px; }
.sev-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--fg2); font-family: var(--font-display); }
.sev-track {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  position: relative;
}
.sev-fill {
  height: 100%;
  border-radius: 3px;
  position: absolute;
  left: 0;
  top: 0;
}
.sev-orange { background: linear-gradient(90deg, var(--accent), var(--warn)); width: 60%; }
.sev-cursor {
  position: absolute;
  right: 40%;
  top: -3px;
  width: 2px;
  height: 12px;
  background: var(--warn);
  border-radius: 1px;
  box-shadow: 0 0 6px var(--warn);
}
.sev-val { font-size: 11px; color: var(--warn); font-family: var(--font-display); font-weight: 600; }

.phone-footer { display: flex; gap: 10px; }
.phone-tag { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--fg2); }
.tag-dot { width: 7px; height: 7px; border-radius: 50%; }
.tag-dot.orange { background: var(--warn); box-shadow: 0 0 5px var(--warn); }
.tag-dot.green { background: var(--green); box-shadow: 0 0 5px var(--green); }

.phone-glow {
  position: absolute;
  inset: -1px;
  border-radius: 36px;
  background: transparent;
  box-shadow: 0 0 40px rgba(0,229,255,0.12);
  pointer-events: none;
}

/* AR HUD */
.ar-hud {
  background: rgba(10, 24, 40, 0.7);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  width: 280px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.hud-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--fg2);
}
.hud-line.hud-warn { color: var(--warn); }
.hud-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fg2);
  flex-shrink: 0;
}
.hud-dot.warn { background: var(--warn); box-shadow: 0 0 6px var(--warn); }
.hud-dot.green { background: var(--green); }

/* SCROLL CUE */
.hero-scroll-cue {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--fg2);
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(4px); }
}

/* FEATURES */
.features {
  padding: 100px 40px;
  background: var(--bg2);
  border-top: 1px solid var(--border);
}
.features-header {
  max-width: 1200px;
  margin: 0 auto 60px;
}
.section-label {
  font-family: var(--font-display);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  display: block;
  margin-bottom: 16px;
}
.features-header h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 46px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.features-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  transition: border-color 0.3s, transform 0.3s;
}
.feature-card:hover {
  border-color: rgba(0,229,255,0.3);
  transform: translateY(-2px);
}
.feature-primary {
  background: linear-gradient(135deg, rgba(0,229,255,0.06), rgba(0,229,255,0.02));
  border-color: rgba(0,229,255,0.2);
}
.feature-icon { margin-bottom: 18px; }
.feature-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--fg);
}
.feature-card p { font-size: 14px; color: var(--fg2); line-height: 1.6; }

/* SCANNER SECTION */
.scanner-section {
  padding: 100px 40px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.scanner-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.scanner-text h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}
.scanner-text p {
  font-size: 16px;
  color: var(--fg2);
  margin-bottom: 36px;
  line-height: 1.65;
}
.scan-steps { display: flex; flex-direction: column; gap: 28px; }
.step { display: flex; gap: 20px; }
.step-num {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: 0.04em;
}
.step-body h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}
.step-body p { font-size: 13px; color: var(--fg2); line-height: 1.6; }

/* DIAG PANEL */
.diag-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.diag-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(0,229,255,0.04);
}
.diag-title {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.diag-time {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--accent);
}
.diag-systems { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.sys-row { display: flex; align-items: center; gap: 12px; }
.sys-name { font-size: 12px; color: var(--fg2); width: 130px; flex-shrink: 0; }
.sys-status {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 4px;
  width: 60px;
  text-align: center;
  flex-shrink: 0;
}
.sys-status.ok { background: rgba(0,232,122,0.1); color: var(--green); }
.sys-status.warn { background: rgba(255,184,0,0.1); color: var(--warn); }
.sys-bar {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}
.bar-fill { height: 100%; border-radius: 2px; }
.bar-fill.green { background: var(--green); }
.bar-fill.orange { background: linear-gradient(90deg, var(--accent), var(--warn)); }
.diag-footer {
  display: flex;
  justify-content: space-between;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--fg2);
}
.diag-score { color: var(--warn); font-family: var(--font-display); font-weight: 600; }

/* CODE SECTION */
.code-section {
  padding: 100px 40px;
  background: var(--bg2);
  border-top: 1px solid var(--border);
}
.code-inner { max-width: 900px; margin: 0 auto; }
.code-header { margin-bottom: 48px; }
.code-header h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.code-examples { display: flex; flex-direction: column; gap: 20px; }
.code-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.code-card-head {
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.code-badge {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 4px;
}
.badge-urgent { background: rgba(255,77,77,0.15); color: var(--danger); }
.badge-monitor { background: var(--warn-dim); color: var(--warn); }
.code-id { font-family: var(--font-display); font-size: 14px; font-weight: 600; color: var(--fg); }
.code-body { padding: 20px; }
.code-plain { font-size: 15px; color: var(--fg); line-height: 1.65; margin-bottom: 20px; }
.code-meta { display: flex; flex-direction: column; gap: 10px; }
.meta-row { display: flex; gap: 12px; font-size: 13px; }
.meta-row > span:first-child {
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  width: 70px;
  flex-shrink: 0;
  padding-top: 1px;
}
.meta-row > span:last-child { color: var(--fg2); }

/* VISION */
.vision-section {
  padding: 100px 40px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.vision-inner { max-width: 900px; margin: 0 auto; text-align: center; }
.vision-quote { margin-bottom: 60px; }
.vision-text {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.5vw, 30px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--fg);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}
.vision-sub { font-size: 16px; color: var(--fg2); line-height: 1.65; max-width: 600px; margin: 0 auto; }
.vision-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding-top: 60px;
  border-top: 1px solid var(--border);
}
.vstat { display: flex; flex-direction: column; gap: 8px; }
.vstat-num {
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.vstat-desc { font-size: 13px; color: var(--fg2); line-height: 1.5; }

/* CLOSING */
.closing-section {
  padding: 100px 40px;
  background: linear-gradient(180deg, var(--bg2) 0%, var(--bg) 100%);
  border-top: 1px solid var(--border);
  text-align: center;
}
.closing-inner { max-width: 700px; margin: 0 auto; }
.closing-section h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}
.closing-section p {
  font-size: 17px;
  color: var(--fg2);
  line-height: 1.65;
  margin-bottom: 40px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.closing-cta { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.cta-phone {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--fg);
  font-family: var(--font-display);
  letter-spacing: 0.04em;
}
.cta-terms {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--fg2);
}
.sep { color: var(--fg2); opacity: 0.4; }

/* FOOTER */
.footer {
  padding: 40px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.footer-inner { max-width: 1200px; margin: 0 auto; text-align: center; }
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--fg);
  margin-bottom: 12px;
}
.footer-tagline { font-size: 14px; color: var(--fg2); margin-bottom: 8px; }
.footer-copy { font-size: 12px; color: var(--fg2); opacity: 0.5; }

/* NAV CTA */
.nav-scan-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 8px;
  padding: 8px 16px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
}
.nav-scan-btn:hover { opacity: 0.88; transform: scale(0.97); }

/* CLOSING CTA */
.closing-scan-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--bg);
  border-radius: 12px;
  padding: 16px 40px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
  margin-bottom: 8px;
}
.closing-scan-btn:hover { opacity: 0.88; transform: scale(0.98); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { align-items: center; }
  .scanner-inner { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .vision-stats { grid-template-columns: 1fr; gap: 28px; }
  .phone-frame { width: 260px; }
  .ar-hud { width: 260px; }
}
@media (max-width: 600px) {
  .nav { padding: 0 20px; }
  .hero { padding: 80px 20px 50px; }
  .features, .scanner-section, .code-section, .vision-section, .closing-section { padding: 60px 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 18px; }
  .stat-val { font-size: 18px; }
}