/* ============================================================
   ADVERTEASE — DESIGN SYSTEM v3.0 (FRONTIER AI HIGH CONTRAST)
   Fonts: Space Grotesk (Headings) + Plus Jakarta Sans (Body) + JetBrains Mono (Data)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── DESIGN TOKENS ───────────────────────────────────────── */
:root {
  --bg:        #040404;
  --s1:        #0B0B0C;
  --s2:        #121214;
  --s3:        #18181C;

  --b1:        #222226;
  --b2:        #2E2E34;
  --b3:        #40404A;

  --sig:       #C8FF00;
  --sig-dim:   rgba(200, 255, 0, 0.14);
  --sig-glow:  rgba(200, 255, 0, 0.06);

  --hot:       #FF4500;
  --hot-dim:   rgba(255, 69, 0, 0.14);

  /* HIGH CONTRAST TEXT - crisp & readable on dark background */
  --t1:        #F5F5F7;
  --t2:        #B5B5C0;
  --t3:        #787885;

  --fd: 'Space Grotesk', sans-serif;
  --fb: 'Plus Jakarta Sans', sans-serif;
  --fm: 'JetBrains Mono', monospace;

  --nav-h:  68px;
  --section-pad: 110px;

  --ease: cubic-bezier(0.2, 0, 0, 1);
}

/* ── RESET ──────────────────────────────────────────────── */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--t1);
  font-family: var(--fb);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  line-height: 1.65;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; color: inherit; }
svg { display: block; }

/* ── GLOBAL DATA STREAM BACKGROUND ──────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--b1) 1px, transparent 1px),
    linear-gradient(90deg, var(--b1) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.3;
}

/* Data Stream Continuous Vertical Line */
.data-stream-line {
  position: fixed; top: 0; bottom: 0; left: 10%; z-index: 0;
  width: 1px; background: linear-gradient(180deg, transparent, var(--b2), var(--sig-dim), transparent);
  pointer-events: none;
}
.data-stream-line::after {
  content: '';
  position: absolute; top: 0; left: -1px; width: 3px; height: 120px;
  background: linear-gradient(180deg, transparent, var(--sig), transparent);
  animation: stream-flow 8s linear infinite;
}
@keyframes stream-flow {
  0% { top: -120px; }
  100% { top: 100%; }
}

/* ── NAVIGATION ─────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  height: var(--nav-h);
  display: flex; align-items: center;
  padding: 0 48px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.nav.scrolled {
  background: rgba(4,4,4,0.96);
  border-color: var(--b1);
  backdrop-filter: blur(12px);
}
.nav-logo { display: flex; align-items: center; }
.nav-logo img { height: 32px; width: auto; }

.nav-center {
  display: flex; align-items: center; gap: 0;
  margin: 0 auto;
}
.nav-center a {
  font-family: var(--fb);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--t2);
  letter-spacing: 0.01em;
  padding: 8px 20px;
  transition: color 0.2s;
}
.nav-center a:hover, .nav-center a.active { color: var(--t1); }

.nav-right { display: flex; align-items: center; gap: 16px; }

.nav-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px;
  font-family: var(--fb);
  font-size: 0.82rem;
  font-weight: 600;
  color: #000;
  background: var(--t1);
  border: 1px solid var(--t1);
  letter-spacing: 0.02em;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.nav-btn:hover { background: var(--sig); border-color: var(--sig); color: #000; }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  width: 24px; cursor: pointer; margin-left: auto;
}
.hamburger span { display: block; height: 1.5px; background: var(--t1); }

.nav-mobile-overlay {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: var(--bg); flex-direction: column;
  align-items: flex-start; justify-content: flex-end;
  padding: 48px;
  gap: 8px;
}
.nav-mobile-overlay.open { display: flex; }
.nav-mobile-overlay a {
  font-family: var(--fd);
  font-size: 2.2rem; font-weight: 700;
  color: var(--t2); transition: color 0.2s;
  padding: 6px 0;
}
.nav-mobile-overlay a:hover { color: var(--t1); }
.nav-close-btn {
  position: absolute; top: 28px; right: 48px;
  font-size: 0.8rem; color: var(--t2); letter-spacing: 0.1em;
  text-transform: uppercase; font-family: var(--fm);
  cursor: pointer;
}

/* ── TYPOGRAPHY ─────────────────────────────────────────── */
.label {
  font-family: var(--fm);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--t2);
}
.label-sig { color: var(--sig); }
.label-hot { color: var(--hot); }

.d1 {
  font-family: var(--fd);
  font-size: clamp(2.4rem, 4.5vw, 4.6rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--t1);
}
.d2 {
  font-family: var(--fd);
  font-size: clamp(2rem, 3.8vw, 3.8rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--t1);
}
.d3 {
  font-family: var(--fd);
  font-size: clamp(1.6rem, 2.8vw, 2.6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--t1);
}
.body-lg { font-size: 1.05rem; line-height: 1.75; color: var(--t2); }
.body-md { font-size: 0.92rem; line-height: 1.75; color: var(--t2); }
.body-sm { font-size: 0.82rem; line-height: 1.7; color: var(--t2); }

/* ── LAYOUT ─────────────────────────────────────────────── */
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 48px; }
.wrap-sm { max-width: 880px; margin: 0 auto; padding: 0 48px; }

.section {
  position: relative; z-index: 1;
  padding: var(--section-pad) 0;
  border-top: 1px solid var(--b1);
}
.section:first-of-type { border-top: none; }

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px;
  font-family: var(--fb);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid;
}
.btn-white {
  background: var(--t1);
  color: #000;
  border-color: var(--t1);
}
.btn-white:hover { background: var(--sig); border-color: var(--sig); transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--t2);
  border-color: var(--b2);
}
.btn-outline:hover { color: var(--t1); border-color: var(--b3); transform: translateY(-2px); }
.btn-sig {
  background: var(--sig);
  color: #000;
  border-color: var(--sig);
}
.btn-sig:hover { background: #B4E600; border-color: #B4E600; transform: translateY(-2px); box-shadow: 0 10px 30px rgba(200,255,0,0.25); }
.btn-lg { padding: 15px 34px; font-size: 0.92rem; }
.btn-arr { font-size: 0.85em; transition: transform 0.2s var(--ease); }
.btn:hover .btn-arr { transform: translateX(4px); }

/* ── CARDS & HOVER ANIMATIONS ────────────────────────────── */
.card {
  background: var(--s1);
  border: 1px solid var(--b1);
  padding: 32px;
  position: relative;
  transition: all 0.3s var(--ease);
}
.card:hover {
  border-color: var(--b3);
  transform: translateY(-4px);
}

.cell {
  border: 1px solid var(--b1);
  padding: 40px 32px;
  background: var(--s1);
  position: relative;
  transition: all 0.3s var(--ease);
}
.cell:hover {
  border-color: var(--sig);
  background: var(--s2);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}
.cell::before {
  content: '';
  position: absolute; top: -1px; left: 0; right: 0;
  height: 2px; background: var(--sig);
  opacity: 0; transition: opacity 0.3s;
}
.cell:hover::before { opacity: 1; }

.cell-num {
  font-family: var(--fm);
  font-size: 0.62rem;
  color: var(--t3);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  display: block;
}
.cell h3 {
  font-family: var(--fd);
  font-size: 1.05rem; font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px; color: var(--t1);
}
.cell p { font-size: 0.88rem; color: var(--t2); line-height: 1.75; }

/* ── STAT STRIP ──────────────────────────────────────────── */
.stat-strip {
  display: grid;
  border-top: 1px solid var(--b1);
  border-bottom: 1px solid var(--b1);
}
.stat-strip-4 { grid-template-columns: repeat(4, 1fr); }
.stat-strip-3 { grid-template-columns: repeat(3, 1fr); }
.stat-item {
  padding: 40px 48px;
  border-right: 1px solid var(--b1);
  position: relative; z-index: 1;
}
.stat-item:last-child { border-right: none; }
.stat-val {
  font-family: var(--fm);
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--t1);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-val.sig { color: var(--sig); }
.stat-label { font-size: 0.82rem; color: var(--t2); font-family: var(--fb); }
.stat-sub { font-size: 0.72rem; color: var(--t3); font-family: var(--fm); margin-top: 4px; }

/* ── ICON BOX ────────────────────────────────────────────── */
.icon-box {
  width: 44px; height: 44px;
  border: 1px solid var(--b2);
  display: flex; align-items: center; justify-content: center;
  background: var(--s2);
  flex-shrink: 0;
  transition: border-color 0.2s;
}
.cell:hover .icon-box { border-color: var(--sig); }

/* ── BADGES ──────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  font-family: var(--fm);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid;
}
.badge-live {
  border-color: var(--sig);
  color: var(--sig);
  background: var(--sig-glow);
}
.badge-live::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--sig);
  animation: pulse-live 2s infinite;
}
.badge-neutral { border-color: var(--b2); color: var(--t2); }
.badge-hot { border-color: var(--hot); color: var(--hot); background: var(--hot-dim); }

/* ── DEMO VIDEO GLOW BACKGROUND ───────────────────────────── */
.demo-glow-wrapper {
  position: relative;
  max-width: 960px; margin: 0 auto;
}
.demo-glow-wrapper::before {
  content: '';
  position: absolute; inset: -10px;
  background: radial-gradient(circle at 50% 50%, rgba(200,255,0,0.12), transparent 70%);
  filter: blur(20px);
  z-index: 0;
  pointer-events: none;
  animation: pulse-glow 4s ease-in-out infinite alternate;
}
@keyframes pulse-glow {
  0% { opacity: 0.4; }
  100% { opacity: 1; }
}

/* ── FORM CONTROLS ───────────────────────────────────────── */
.field { margin-bottom: 16px; }
.field-label {
  display: block;
  font-family: var(--fm);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--t2);
  margin-bottom: 6px;
}
.field-input, .field-select, .field-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--s2);
  border: 1px solid var(--b2);
  color: var(--t1);
  font-family: var(--fb);
  font-size: 0.9rem;
  transition: border-color 0.2s;
  -webkit-appearance: none;
}
.field-input:focus, .field-select:focus, .field-textarea:focus {
  outline: none;
  border-color: var(--sig);
}
.field-input::placeholder, .field-textarea::placeholder { color: var(--t3); }
.field-textarea { resize: vertical; min-height: 100px; line-height: 1.6; }
.field-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23B5B5C0' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--b2);
  outline: none;
  margin: 12px 0;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  background: var(--sig);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px rgba(200,255,0,0.5);
}

/* ── MODAL POPUP ─────────────────────────────────────────── */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 1000;
  background: rgba(4,4,4,0.85); backdrop-filter: blur(8px);
  align-items: center; justify-content: center;
  padding: 24px;
}
.modal-overlay.active { display: flex; }
.modal-card {
  background: var(--s1);
  border: 1px solid var(--sig);
  padding: 48px; max-width: 520px; width: 100%;
  text-align: center;
  position: relative;
  box-shadow: 0 30px 90px rgba(0,0,0,0.8);
  animation: modal-in 0.3s var(--ease);
}
@keyframes modal-in {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-title { font-family: var(--fd); font-size: 1.6rem; font-weight: 700; color: var(--t1); margin-bottom: 12px; }
.modal-text { font-size: 0.95rem; color: var(--t2); line-height: 1.7; margin-bottom: 28px; }

/* ── TERMINALS ───────────────────────────────────────────── */
.terminal {
  background: #000;
  border: 1px solid var(--b2);
  font-family: var(--fm);
  font-size: 0.75rem;
  overflow: hidden;
}
.terminal-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--b2);
  background: var(--s1);
}
.terminal-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--b3); }
.terminal-filename {
  font-family: var(--fm); font-size: 0.62rem;
  color: var(--t3); margin-left: 8px; letter-spacing: 0.05em;
}
.terminal-body { padding: 20px; line-height: 2; color: var(--t2); }
.t-sig   { color: var(--sig); }
.t-hot   { color: var(--hot); }
.t-t1    { color: var(--t1); }
.t-t3    { color: var(--t3); }

/* ── TIMELINE ────────────────────────────────────────────── */
.timeline { display: flex; flex-direction: column; gap: 0; }
.tl-item {
  display: grid;
  grid-template-columns: 120px 1px 1fr;
  gap: 0 24px;
  padding-bottom: 40px;
}
.tl-date {
  font-family: var(--fm);
  font-size: 0.65rem;
  color: var(--t3);
  letter-spacing: 0.08em;
  padding-top: 4px;
  text-align: right;
}
.tl-line { display: flex; flex-direction: column; align-items: center; }
.tl-dot {
  width: 7px; height: 7px;
  border: 1px solid var(--b3);
  border-radius: 50%;
  background: var(--bg);
  flex-shrink: 0; margin-top: 4px;
}
.tl-dot.done { background: var(--sig); border-color: var(--sig); }
.tl-dot.active { background: var(--hot); border-color: var(--hot); }
.tl-connector { flex: 1; width: 1px; background: var(--b1); margin-top: 4px; }
.tl-title {
  font-family: var(--fd); font-size: 0.95rem; font-weight: 600;
  color: var(--t1); margin-bottom: 6px;
}
.tl-desc { font-size: 0.85rem; color: var(--t2); line-height: 1.7; }

/* ── FOOTER ─────────────────────────────────────────────── */
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--b1);
  padding: 60px 0 40px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 80px; margin-bottom: 60px;
}
.footer-logo { height: 28px; filter: brightness(0) invert(1); margin-bottom: 16px; }
.footer-about { font-size: 0.85rem; color: var(--t2); line-height: 1.75; max-width: 280px; }
.footer-col h5 {
  font-family: var(--fm); font-size: 0.6rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--t3); margin-bottom: 16px;
}
.footer-col a {
  display: block; font-size: 0.85rem; color: var(--t2);
  margin-bottom: 10px; transition: color 0.15s;
}
.footer-col a:hover { color: var(--t1); }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 28px; border-top: 1px solid var(--b1);
  font-size: 0.78rem; color: var(--t3); font-family: var(--fm);
}
.footer-sig { display: flex; align-items: center; gap: 6px; font-size: 0.65rem; color: var(--t3); letter-spacing: 0.05em; }
.footer-sig-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--sig); animation: pulse-live 3s infinite; }

/* ── REVEAL ANIMATIONS ───────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(20px); }
.reveal.in { opacity: 1; transform: none; transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal-up { opacity: 0; transform: translateY(30px); }
.reveal-up.in { opacity: 1; transform: none; transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }

@keyframes pulse-live {
  0%,100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ── PAGE HERO ───────────────────────────────────────────── */
.page-hero {
  padding: calc(var(--nav-h) + 60px) 0 60px;
  border-bottom: 1px solid var(--b1);
  position: relative; overflow: hidden;
}
.page-hero-inner { position: relative; z-index: 1; }

.sec-label {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 48px;
}
.sec-label-line { flex: 1; height: 1px; background: var(--b1); }
.sec-label-num {
  font-family: var(--fm); font-size: 0.62rem;
  color: var(--t3); letter-spacing: 0.15em; flex-shrink: 0;
}

/* ── TABS ────────────────────────────────────────────────── */
.tab-bar { display: flex; border-bottom: 1px solid var(--b2); margin-bottom: 48px; }
.tab-btn {
  padding: 12px 24px; font-family: var(--fm);
  font-size: 0.65rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--t3);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: color 0.2s, border-color 0.2s; cursor: pointer;
}
.tab-btn:hover { color: var(--t2); }
.tab-btn.active { color: var(--t1); border-color: var(--sig); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

@media (max-width: 1024px) {
  :root { --section-pad: 80px; }
  .wrap, .wrap-sm { padding: 0 32px; }
  .nav { padding: 0 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 48px; }
  .stat-strip-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --section-pad: 60px; }
  .wrap, .wrap-sm { padding: 0 20px; }
  .nav { padding: 0 20px; }
  .nav-center, .nav-right .nav-btn { display: none; }
  .hamburger { display: flex; }
  .stat-strip-4, .stat-strip-3 { grid-template-columns: 1fr; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--b1); }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .d1 { font-size: clamp(2.2rem, 8vw, 3.6rem); }
}