@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Orbitron:wght@500;600;700;800&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --bg: #02050b;
  --bg-soft: #07101d;
  --panel: rgba(10, 21, 37, 0.74);
  --panel-solid: #0a1525;
  --line: rgba(107, 223, 255, 0.18);
  --line-strong: rgba(107, 223, 255, 0.42);
  --cyan: #49e7ff;
  --cyan-2: #99f4ff;
  --blue: #3178ff;
  --violet: #8b5cf6;
  --text: #f4f8ff;
  --muted: #9aabc2;
  --muted-2: #72839b;
  --success: #66ffc4;
  --danger: #ff6c93;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  --radius: 24px;
  --radius-sm: 16px;
  --max: 1240px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scrollbar-color: var(--cyan) rgba(7, 16, 29, 0.95);
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}
::-webkit-scrollbar-track {
  background: linear-gradient(180deg, rgba(7,16,29,.98), rgba(3,7,14,.98));
}
::-webkit-scrollbar-thumb {
  background: var(--cyan);
  border-radius: 999px;
  border: 2px solid rgba(7,16,29,.96);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.14), 0 0 18px rgba(73,231,255,.38);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--cyan-2);
}
::-webkit-scrollbar-corner {
  background: rgba(7,16,29,.98);
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 15% 5%, rgba(49, 120, 255, 0.11), transparent 28%),
    radial-gradient(circle at 90% 20%, rgba(139, 92, 246, 0.09), transparent 24%),
    var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
  z-index: -1;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }

.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.section { padding: 108px 0; position: relative; }
.section.compact { padding: 72px 0; }
.section-dark { background: linear-gradient(180deg, rgba(7,16,29,.38), rgba(7,16,29,.8)); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-family: 'IBM Plex Mono', monospace;
  font-size: .75rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.eyebrow::before { content: ''; width: 26px; height: 1px; background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }

h1, h2, h3, h4 { margin: 0 0 18px; line-height: 1.1; }
h1, h2, .brand-title { font-family: 'Orbitron', sans-serif; letter-spacing: -.035em; }
h1 { font-size: clamp(2.9rem, 7.7vw, 7.1rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 4.8vw, 4.35rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
p { margin: 0 0 18px; color: var(--muted); }
.lead { font-size: clamp(1.05rem, 2vw, 1.35rem); max-width: 760px; color: #c7d3e5; }
.text-gradient { color: transparent; background: linear-gradient(110deg, #fff 5%, var(--cyan) 46%, #a88cff 80%); background-clip: text; -webkit-background-clip: text; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: .3s ease;
}
.site-header.scrolled {
  background: rgba(2, 5, 11, .84);
  backdrop-filter: blur(18px);
  border-color: var(--line);
}
.nav {
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: max-content; }
.brand-mark { width: 42px; height: 42px; filter: drop-shadow(0 0 16px rgba(73, 231, 255, .34)); }
.brand-copy strong { display: block; font-family: 'Orbitron'; font-size: .83rem; letter-spacing: .09em; }
.brand-copy span { display: block; font-size: .66rem; color: var(--muted-2); letter-spacing: .13em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: .87rem; }
.nav-links a { color: #b8c5d8; transition: .2s; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: -8px; height: 1px; background: var(--cyan); transition: .25s; }
.nav-links a:hover::after, .nav-links a.active::after { right: 0; }
.nav-cta { padding: 11px 18px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--cyan) !important; }
.nav-cta::after { display: none; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: rgba(255,255,255,.03); border-radius: 12px; color: var(--text); }
.menu-toggle span, .menu-toggle::before, .menu-toggle::after { content: ''; display: block; width: 20px; height: 1px; background: currentColor; margin: 5px auto; transition: .25s; }

.hero {
  min-height: 100svh;
  display: grid;
  place-items: center;
  position: relative;
  isolation: isolate;
  overflow: hidden;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -3; }
.hero::after { content: ''; position: absolute; inset: 0; z-index: -2; background: linear-gradient(to bottom, rgba(2,5,11,.05), rgba(2,5,11,.2) 55%, var(--bg) 100%); }
.hero-content { padding-top: 110px; padding-bottom: 70px; text-align: center; }
.hero h1 { max-width: 1180px; margin-inline: auto; text-transform: uppercase; }
.hero .lead { margin: 24px auto 34px; }
.hero-status { display: inline-flex; align-items: center; gap: 10px; padding: 9px 14px; border: 1px solid var(--line); border-radius: 999px; background: rgba(3,8,15,.55); color: #afbdd1; font-family: 'IBM Plex Mono'; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 14px var(--success); animation: pulse 1.7s infinite; }
@keyframes pulse { 50% { opacity: .42; transform: scale(.76); } }
.hero-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 52px; padding: 0 23px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,.025); color: var(--text); font-weight: 600; transition: .25s; }
.btn:hover { transform: translateY(-2px); border-color: var(--line-strong); background: rgba(73,231,255,.08); }
.btn-primary { background: linear-gradient(110deg, var(--blue), var(--violet)); border-color: transparent; box-shadow: 0 14px 38px rgba(49,120,255,.25); }
.btn-primary:hover { background: linear-gradient(110deg, #4b8dff, #9a72ff); }
.btn-small { min-height: 42px; padding: 0 17px; font-size: .85rem; }
.btn-icon::after { content: '↗'; font-size: 1rem; }
.scroll-indicator { position: absolute; left: 50%; bottom: 27px; transform: translateX(-50%); display: grid; gap: 8px; justify-items: center; color: var(--muted-2); font-size: .62rem; letter-spacing: .18em; text-transform: uppercase; }
.scroll-line { width: 1px; height: 46px; background: linear-gradient(var(--cyan), transparent); animation: scan 2s infinite; }
@keyframes scan { 0% { transform: scaleY(.2); transform-origin: top; opacity:.2;} 50% { transform: scaleY(1); opacity:1;} 100% { transform: scaleY(.2); transform-origin: bottom; opacity:.2;} }

.signal-strip { border-block: 1px solid var(--line); background: rgba(5,13,24,.7); overflow: hidden; }
.signal-strip-inner { height: 92px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; gap: 20px; }
.signal-metric { border-right: 1px solid var(--line); padding-right: 20px; }
.signal-metric:last-child { border: 0; }
.signal-metric small { display: block; color: var(--muted-2); font-family: 'IBM Plex Mono'; text-transform: uppercase; letter-spacing: .1em; }
.signal-metric strong { font-family: 'Orbitron'; font-size: 1.3rem; color: #dffbff; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 88px); align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 46px; }
.section-head p { max-width: 620px; }

.glass-card {
  background: linear-gradient(145deg, rgba(14, 30, 52, .76), rgba(6, 14, 26, .64));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.info-card { padding: 28px; position: relative; overflow: hidden; }
.info-card::before { content: ''; position: absolute; width: 150px; height: 150px; border-radius: 50%; background: var(--cyan); filter: blur(100px); opacity: .08; right: -20px; top: -30px; }
.info-card .number { font-family: 'Orbitron'; font-size: .8rem; color: var(--cyan); margin-bottom: 38px; }
.info-card p { font-size: .94rem; }
.icon-box { width: 52px; height: 52px; border-radius: 15px; display: grid; place-items: center; border: 1px solid var(--line); background: rgba(73,231,255,.06); margin-bottom: 22px; color: var(--cyan); font-size: 1.45rem; }

.feature-visual { min-height: 500px; position: relative; overflow: hidden; display: grid; place-items: center; }
.spacetime-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(73,231,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(73,231,255,.12) 1px, transparent 1px); background-size: 40px 40px; transform: perspective(600px) rotateX(62deg) scale(1.5); transform-origin: center bottom; mask-image: radial-gradient(circle, black 20%, transparent 72%); }
.orbit-system { position: relative; width: 310px; aspect-ratio: 1; }
.orbit-ring { position: absolute; inset: 10%; border: 1px solid rgba(73,231,255,.23); border-radius: 50%; animation: rotate 12s linear infinite; }
.orbit-ring::before, .orbit-ring::after { content: ''; position: absolute; top: 50%; width: 42px; aspect-ratio: 1; border-radius: 50%; transform: translateY(-50%); background: radial-gradient(circle at 35% 35%, #d8faff 0 4%, #538fff 16%, #050812 55%); box-shadow: 0 0 30px rgba(49,120,255,.6); }
.orbit-ring::before { left: -21px; }
.orbit-ring::after { right: -21px; width: 34px; background: radial-gradient(circle at 35% 35%, #e9ddff 0 4%, #8b5cf6 16%, #050812 55%); }
.orbit-core { position: absolute; inset: 38%; border-radius: 50%; background: radial-gradient(circle, white 0 2%, var(--cyan) 7%, rgba(49,120,255,.3) 24%, transparent 68%); filter: blur(.3px); animation: pulseCore 2.4s ease-in-out infinite; }
@keyframes rotate { to { transform: rotate(360deg); } }
@keyframes pulseCore { 50% { transform: scale(1.22); filter: blur(1px); } }

.steps { display: grid; gap: 14px; }
.step { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: rgba(255,255,255,.02); display: grid; grid-template-columns: 42px 1fr; gap: 16px; transition: .25s; }
.step:hover { border-color: var(--line-strong); transform: translateX(6px); background: rgba(73,231,255,.035); }
.step-index { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: rgba(73,231,255,.08); color: var(--cyan); font-family: 'IBM Plex Mono'; }
.step h3 { font-size: 1.06rem; margin: 2px 0 7px; }
.step p { margin: 0; font-size: .9rem; }

.lab-card { min-height: 360px; padding: 28px; position: relative; overflow: hidden; display: flex; flex-direction: column; transition: .3s; }
.lab-card:hover { transform: translateY(-8px); border-color: var(--line-strong); }
.lab-card .visual { height: 140px; border-radius: 18px; margin-bottom: 25px; position: relative; overflow: hidden; background: radial-gradient(circle at 50% 50%, rgba(49,120,255,.3), rgba(2,5,11,.3) 52%), linear-gradient(135deg, rgba(73,231,255,.06), rgba(139,92,246,.08)); border: 1px solid rgba(255,255,255,.05); }
.lab-card .visual::before { content:''; position:absolute; inset:0; background-image: radial-gradient(circle, rgba(255,255,255,.8) 0 1px, transparent 1.3px); background-size: 29px 29px; opacity:.15; }
.lab-card h3 { font-family: 'Orbitron'; font-size: 1.25rem; }
.lab-card p { font-size: .91rem; flex: 1; }
.lab-card .card-link { color: var(--cyan); font-weight: 600; font-size: .9rem; }
.wave-graphic { position:absolute; left:7%; right:7%; top:50%; height:2px; background: var(--cyan); box-shadow: 0 0 16px var(--cyan); transform: translateY(-50%); clip-path: polygon(0 45%,8% 45%,12% 25%,16% 70%,20% 10%,24% 90%,28% 30%,34% 60%,40% 42%,48% 52%,56% 46%,65% 49%,75% 47%,85% 50%,100% 48%,100% 53%,85% 54%,75% 52%,65% 55%,56% 52%,48% 58%,40% 49%,34% 67%,28% 37%,24% 96%,20% 16%,16% 77%,12% 32%,8% 52%,0 52%); height:58px; }
.interferometer-graphic::before, .interferometer-graphic::after { content:''; position:absolute; background:linear-gradient(90deg,transparent,var(--cyan),transparent); box-shadow:0 0 12px var(--cyan); }
.interferometer-graphic::before { height:2px; left:50%; right:7%; top:50%; }
.interferometer-graphic::after { width:2px; top:8%; bottom:50%; left:50%; }
.interferometer-graphic span { position:absolute; width:18px; height:18px; border:2px solid var(--cyan); left:calc(50% - 9px); top:calc(50% - 9px); transform:rotate(45deg); }
.blackhole-graphic::before, .blackhole-graphic::after { content:''; position:absolute; top:50%; width:68px; aspect-ratio:1; border-radius:50%; background:#010204; box-shadow:0 0 0 5px rgba(73,231,255,.08),0 0 35px rgba(73,231,255,.44); }
.blackhole-graphic::before { left:22%; transform:translateY(-50%); }
.blackhole-graphic::after { right:22%; transform:translateY(-50%) scale(.75); box-shadow:0 0 0 5px rgba(139,92,246,.08),0 0 35px rgba(139,92,246,.44); }

.map-card { min-height: 520px; position: relative; overflow: hidden; background: radial-gradient(circle at 55% 45%, rgba(49,120,255,.17), transparent 28%), linear-gradient(160deg,#09192d,#03070e); }
.map-card::before { content:''; position:absolute; inset:0; background-image: radial-gradient(circle, rgba(73,231,255,.42) 0 1px, transparent 1.4px); background-size: 34px 34px; opacity:.11; }
.sardinia-shape { width: 210px; height: 390px; position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%) rotate(-8deg); background: linear-gradient(160deg,rgba(73,231,255,.33),rgba(49,120,255,.07)); filter: drop-shadow(0 0 28px rgba(73,231,255,.25)); clip-path: polygon(48% 0,70% 7%,75% 22%,67% 31%,76% 45%,66% 58%,70% 72%,58% 100%,43% 93%,31% 79%,25% 63%,30% 50%,18% 38%,28% 27%,31% 11%); border:1px solid var(--cyan); }
.map-pin { position:absolute; left:53%; top:43%; width:18px; height:18px; border:3px solid var(--cyan); border-radius:50%; box-shadow:0 0 0 10px rgba(73,231,255,.08),0 0 24px var(--cyan); animation:pulse 1.7s infinite; }
.map-label { position:absolute; left:57%; top:40%; padding:8px 12px; border:1px solid var(--line); border-radius:8px; background:rgba(2,5,11,.84); font-family:'IBM Plex Mono'; font-size:.7rem; color:var(--cyan); }

.news-card { overflow:hidden; }
.news-image { height:210px; position:relative; background: radial-gradient(circle at 55% 50%, rgba(73,231,255,.15), transparent 26%), linear-gradient(135deg,#0c2240,#070d18 58%,#1b1036); border-bottom: 1px solid rgba(255,255,255,.05); }
.news-image img { width:100%; height:100%; object-fit:cover; display:block; }
.news-body { padding:26px; }
.meta { display:flex; gap:12px; align-items:center; color:var(--muted-2); font-family:'IBM Plex Mono'; font-size:.7rem; text-transform:uppercase; letter-spacing:.08em; margin-bottom:14px; }
.tag { color:var(--cyan); }

.page-hero { min-height: 560px; padding-top: 170px; display: flex; align-items: center; position: relative; overflow: hidden; }
.page-hero::before { content:''; position:absolute; width:700px; height:700px; border-radius:50%; border:1px solid rgba(73,231,255,.12); right:-240px; top:-250px; box-shadow:0 0 0 80px rgba(73,231,255,.012),0 0 0 160px rgba(73,231,255,.008); }
.page-hero h1 { font-size: clamp(2.8rem, 7vw, 6.2rem); max-width:1000px; }

.article-layout { display:grid; grid-template-columns:minmax(0,1fr) 320px; gap:54px; align-items:start; }
.prose { max-width:820px; }
.prose h2 { font-size:clamp(1.7rem,3vw,2.6rem); margin-top:54px; }
.prose h3 { margin-top:34px; }
.prose p, .prose li { color:#b3c1d5; }
.prose ul { padding-left:20px; }
.sidebar { position:sticky; top:110px; padding:24px; }
.sidebar a { display:block; padding:12px 0; border-bottom:1px solid var(--line); color:var(--muted); font-size:.9rem; }
.sidebar a:hover { color:var(--cyan); }
.callout { padding:26px; border-left:3px solid var(--cyan); background:rgba(73,231,255,.045); border-radius:0 16px 16px 0; margin:32px 0; }
.callout p:last-child { margin-bottom:0; }

.simulator-shell { padding-top: 125px; min-height:100vh; }
.simulator-head { display:flex; justify-content:space-between; align-items:end; gap:24px; margin-bottom:28px; }
.simulator-head h1 { font-size:clamp(2rem,4vw,4rem); }
.simulator-grid { display:grid; grid-template-columns:330px minmax(0,1fr); gap:22px; align-items:start; }
.control-panel { padding:24px; position:sticky; top:105px; }
.control-group { margin-bottom:22px; }
.control-label { display:flex; justify-content:space-between; align-items:center; gap:10px; margin-bottom:9px; font-size:.87rem; color:#c6d3e4; }
.control-value { font-family:'IBM Plex Mono'; color:var(--cyan); font-size:.78rem; }
input[type='range'] { width:100%; accent-color:var(--cyan); }
select, input[type='text'], input[type='email'], textarea { width:100%; background:#07101d; border:1px solid var(--line); color:var(--text); border-radius:12px; padding:12px 14px; outline:none; }
select:focus, input:focus, textarea:focus { border-color:var(--cyan); box-shadow:0 0 0 3px rgba(73,231,255,.08); }
.simulator-stage { min-height:640px; padding:18px; display:grid; grid-template-rows:minmax(380px,1fr) auto; gap:18px; }
.canvas-wrap { min-height:420px; border-radius:18px; background:radial-gradient(circle at 50% 50%,#102444,#030711 55%); border:1px solid rgba(255,255,255,.05); overflow:hidden; position:relative; }
.canvas-wrap canvas { width:100%; height:100%; display:block; }
.data-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; }
.data-box { padding:16px; border:1px solid var(--line); border-radius:14px; background:rgba(255,255,255,.02); }
.data-box small { display:block; color:var(--muted-2); font-size:.69rem; text-transform:uppercase; letter-spacing:.08em; }
.data-box strong { display:block; margin-top:5px; color:#e9fbff; font-family:'IBM Plex Mono'; font-size:.9rem; }
.explainer { margin-top:22px; padding:28px; }
.disclaimer { color:var(--muted-2); font-size:.78rem; margin-top:15px; }

.glossary-tools { display:flex; gap:12px; margin-bottom:30px; }
.glossary-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:18px; }
.glossary-item { padding:25px; }
.glossary-item h3 { color:var(--cyan-2); font-family:'Orbitron'; font-size:1rem; }
.glossary-letter { font-family:'Orbitron'; color:var(--cyan); font-size:2.6rem; margin:38px 0 14px; }

.contact-grid { display:grid; grid-template-columns:.8fr 1.2fr; gap:46px; }
.form-card { padding:30px; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.form-field { margin-bottom:15px; }
.form-field label { display:block; margin-bottom:8px; font-size:.84rem; color:#c5d1e2; }
textarea { min-height:150px; resize:vertical; }

.site-footer { padding:66px 0 26px; border-top:1px solid var(--line); background:#02050a; }
.footer-grid { display:grid; grid-template-columns:1.4fr repeat(3,1fr); gap:38px; }
.footer-grid h4 { font-family:'Orbitron'; font-size:.8rem; letter-spacing:.08em; text-transform:uppercase; color:#dce8f8; }
.footer-grid a { display:block; color:var(--muted-2); margin:9px 0; font-size:.88rem; }
.footer-grid a:hover { color:var(--cyan); }
.footer-brand p { max-width:390px; font-size:.88rem; }
.footer-bottom { margin-top:46px; padding-top:20px; border-top:1px solid var(--line); display:flex; justify-content:space-between; gap:22px; color:var(--muted-2); font-size:.74rem; }

.reveal { opacity:0; transform:translateY(28px); transition:opacity .75s ease,transform .75s ease; }
.reveal.visible { opacity:1; transform:none; }

@media (max-width: 1050px) {
  .nav-links { position:fixed; inset:84px 18px auto; padding:22px; flex-direction:column; align-items:stretch; background:rgba(4,10,19,.97); border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow); transform:translateY(-18px); opacity:0; pointer-events:none; transition:.25s; }
  .nav-links.open { transform:none; opacity:1; pointer-events:auto; }
  .menu-toggle { display:block; }
  .grid-3 { grid-template-columns:repeat(2,1fr); }
  .grid-4 { grid-template-columns:repeat(2,1fr); }
  .simulator-grid { grid-template-columns:1fr; }
  .control-panel { position:relative; top:auto; }
  .article-layout { grid-template-columns:1fr; }
  .sidebar { position:relative; top:auto; }
}

@media (max-width: 760px) {
  .container { width:min(calc(100% - 28px),var(--max)); }
  .section { padding:78px 0; }
  .hero-content { padding-top:100px; }
  .hero h1 { font-size:clamp(2.5rem,14vw,4.6rem); }
  .hero .lead { font-size:1rem; }
  .signal-strip-inner { height:auto; padding:20px 0; grid-template-columns:1fr 1fr; }
  .signal-metric:nth-child(2) { border-right:0; }
  .grid-2, .grid-3, .grid-4, .contact-grid { grid-template-columns:1fr; }
  .section-head { align-items:start; flex-direction:column; }
  .feature-visual { min-height:390px; }
  .map-card { min-height:430px; }
  .page-hero { min-height:500px; padding-top:140px; }
  .data-grid { grid-template-columns:1fr 1fr; }
  .simulator-stage { min-height:560px; }
  .simulator-head { align-items:start; flex-direction:column; }
  .glossary-grid { grid-template-columns:1fr; }
  .form-row { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .footer-brand { grid-column:1/-1; }
  .footer-bottom { flex-direction:column; }
}

@media (max-width: 480px) {
  .brand-copy span { display:none; }
  .brand-mark { width:36px; height:36px; }
  .nav { height:74px; }
  .nav-links { inset:74px 12px auto; }
  .hero-actions .btn { width:100%; }
  .signal-strip-inner, .data-grid, .footer-grid { grid-template-columns:1fr; }
  .signal-metric { border-right:0; border-bottom:1px solid var(--line); padding-bottom:12px; }
  .signal-metric:last-child { border:0; }
  .lab-card { min-height:330px; }
}

.beta-notice {
  display:flex;
  align-items:flex-start;
  gap:16px;
  margin:0 0 24px;
  padding:17px 20px;
  border:1px solid rgba(73,231,255,.28);
  border-radius:16px;
  background:linear-gradient(135deg,rgba(49,120,255,.09),rgba(139,92,246,.07));
}
.beta-notice p { margin:0; font-size:.88rem; line-height:1.55; color:#b8c7dc; }
.beta-chip {
  display:inline-flex;
  flex:0 0 auto;
  align-items:center;
  min-height:28px;
  padding:5px 10px;
  border:1px solid rgba(73,231,255,.45);
  border-radius:999px;
  background:rgba(73,231,255,.08);
  color:var(--cyan);
  font-family:'IBM Plex Mono',monospace;
  font-size:.68rem;
  font-weight:500;
  letter-spacing:.1em;
  text-transform:uppercase;
}
body.modal-open { overflow:hidden; }
.beta-modal {
  position:fixed;
  inset:0;
  z-index:9999;
  display:grid;
  place-items:center;
  padding:22px;
  background:rgba(0,3,9,.82);
  backdrop-filter:blur(14px);
}
.beta-modal-panel {
  width:min(100%,620px);
  padding:34px;
  border-color:rgba(73,231,255,.35);
  box-shadow:0 32px 120px rgba(0,0,0,.7),0 0 70px rgba(49,120,255,.12);
}
.beta-modal-panel h2 { margin-top:18px; font-size:clamp(1.65rem,4vw,2.45rem); }
.beta-modal-panel p { color:#b6c5d9; }
.beta-modal-warning {
  margin:22px 0 26px;
  padding:15px 17px;
  border-left:3px solid var(--cyan);
  background:rgba(73,231,255,.06);
  color:#d9f7ff;
  font-size:.88rem;
  line-height:1.55;
}
@media (max-width:680px) {
  .beta-notice { flex-direction:column; gap:11px; }
  .beta-modal { padding:14px; }
  .beta-modal-panel { padding:25px 21px; }
}

.sidebar-line { margin:9px 0; color:var(--muted-2); font-size:.9rem; }