/* SIGNAL Design System — 360 World */
:root {
  --ink: #0B0B0B;
  --lime: #B8E000;
  --lime-dark: #8FB300;
  --lime-glow: rgba(184, 224, 0, 0.15);
  --gray-100: #F5F5F5;
  --gray-300: #AAAAAA;
  --gray-500: #666666;
  --gray-700: #333333;
  --gray-800: #1A1A1A;
  --gray-900: #111111;
  --white: #FFFFFF;
  --danger: #FF4444;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--ink);
  color: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── NAVIGATION ─── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 11, 11, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(184, 224, 0, 0.1);
  padding: 16px 0;
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 1.2rem;
  color: var(--lime);
  text-decoration: none;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--gray-300);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--lime); }

/* ─── HERO ─── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
}

.hero-content {
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--lime);
  color: var(--lime);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero h1 .accent { color: var(--lime); }

.hero p {
  font-size: 1.25rem;
  color: var(--gray-300);
  max-width: 600px;
  margin-bottom: 40px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--lime);
  color: var(--ink);
  font-weight: bold;
  font-size: 0.9rem;
  text-decoration: none;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: background 0.2s;
}

.hero-cta:hover { background: var(--lime-dark); }

/* ─── SECTIONS ─── */
section {
  padding: 120px 0;
}

.section-label {
  display: inline-block;
  color: var(--lime);
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
  margin-bottom: 24px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray-300);
  max-width: 600px;
  margin-bottom: 64px;
}

/* ─── HOW IT WORKS ─── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.step {
  position: relative;
  padding: 40px 32px;
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  transition: border-color 0.3s;
}

.step:hover { border-color: var(--lime); }

.step-number {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 3rem;
  color: var(--lime);
  opacity: 0.3;
  position: absolute;
  top: 16px;
  right: 24px;
}

.step h3 {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.step p {
  color: var(--gray-300);
  font-size: 0.95rem;
}

/* ─── PRIVACY ─── */
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.privacy-card {
  padding: 32px;
  border: 1px solid var(--gray-800);
  text-align: center;
}

.privacy-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.privacy-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--lime);
}

.privacy-card p {
  color: var(--gray-500);
  font-size: 0.85rem;
}

/* ─── USE CASE GRID ─── */
.uc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.uc-card {
  display: block;
  padding: 32px;
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  text-decoration: none;
  color: var(--white);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.uc-card:hover {
  border-color: var(--lime);
  transform: translateY(-2px);
}

.uc-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transition: transform 0.3s;
}

.uc-card:hover::after { transform: scaleX(1); }

.uc-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.uc-number {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 0.75rem;
  color: var(--lime);
  letter-spacing: 2px;
}

.uc-status {
  font-size: 0.65rem;
  padding: 4px 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: bold;
}

.status-live { background: var(--lime); color: var(--ink); }
.status-pilot { background: rgba(184, 224, 0, 0.2); color: var(--lime); }
.status-poc { background: rgba(184, 224, 0, 0.1); color: var(--lime-dark); }
.status-disc { background: rgba(255,255,255,0.08); color: var(--gray-300); }

.uc-card h3 {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 1.3rem;
  margin-bottom: 12px;
  line-height: 1.2;
}

.uc-card p {
  color: var(--gray-500);
  font-size: 0.9rem;
  line-height: 1.5;
}

.uc-card .uc-lock {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-size: 0.75rem;
  color: var(--gray-500);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.uc-card .uc-lock svg {
  width: 14px;
  height: 14px;
  fill: var(--gray-500);
}

/* ─── USE CASE DETAIL PAGE ─── */
.uc-detail {
  padding-top: 120px;
  min-height: 100vh;
}

.uc-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-300);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 40px;
  transition: color 0.2s;
}

.uc-back:hover { color: var(--lime); }

.uc-detail-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 16px;
}

.uc-detail h1 {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
  margin-bottom: 16px;
}

.uc-detail .uc-tagline {
  font-size: 1.2rem;
  color: var(--gray-300);
  max-width: 700px;
  margin-bottom: 64px;
}

.uc-section {
  margin-bottom: 64px;
}

.uc-section h2 {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 1.5rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.uc-section h2 .icon {
  color: var(--lime);
}

.uc-section p, .uc-section li {
  color: var(--gray-300);
  font-size: 1rem;
  line-height: 1.7;
}

.uc-section ul {
  list-style: none;
  padding: 0;
}

.uc-section ul li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
}

.uc-section ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 16px;
  width: 8px;
  height: 2px;
  background: var(--lime);
}

/* Stats bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  margin: 48px 0;
}

.stat-box {
  padding: 24px;
  border: 1px solid var(--gray-800);
  text-align: center;
}

.stat-value {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 2rem;
  color: var(--lime);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-source {
  font-size: 0.65rem;
  color: var(--gray-700);
  margin-top: 4px;
}

/* Pilot info */
.pilot-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  margin-top: 24px;
  font-size: 0.8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.pilot-badge.live { background: var(--lime); color: var(--ink); font-weight: bold; }
.pilot-badge.pilot { border: 1px solid var(--lime); color: var(--lime); }
.pilot-badge.poc { border: 1px solid var(--gray-500); color: var(--gray-500); }
.pilot-badge.disc { border: 1px solid var(--gray-700); color: var(--gray-500); }

/* ─── AI PROOF GATE ─── */
.aiproof-gate {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(11, 11, 11, 0.97);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s;
}

.aiproof-gate.hidden {
  opacity: 0;
  pointer-events: none;
}

.gate-box {
  text-align: center;
  max-width: 480px;
  padding: 48px;
}

.gate-logo {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 1rem;
  color: var(--lime);
  letter-spacing: 3px;
  margin-bottom: 32px;
}

.gate-icon {
  width: 80px;
  height: 80px;
  border: 2px solid var(--lime);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.gate-icon svg {
  width: 36px;
  height: 36px;
  fill: var(--lime);
}

.gate-box h2 {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.gate-box p {
  color: var(--gray-500);
  font-size: 0.95rem;
  margin-bottom: 32px;
  line-height: 1.6;
}

.gate-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 40px;
  background: var(--lime);
  color: var(--ink);
  font-weight: bold;
  font-size: 0.9rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.gate-btn:hover { background: var(--lime-dark); }
.gate-btn:disabled { background: var(--gray-700); color: var(--gray-500); cursor: wait; }

.gate-status {
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--gray-500);
  min-height: 20px;
}

.gate-status.success { color: var(--lime); }
.gate-status.error { color: var(--danger); }

.gate-spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--gray-700);
  border-top-color: var(--lime);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 8px;
  vertical-align: middle;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── FOOTER ─── */
footer {
  padding: 48px 0;
  border-top: 1px solid var(--gray-800);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: "Arial Black", Arial, sans-serif;
  color: var(--lime);
  font-size: 0.9rem;
  letter-spacing: 2px;
}

.footer-text {
  color: var(--gray-700);
  font-size: 0.75rem;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .steps-grid, .privacy-grid {
    grid-template-columns: 1fr;
  }

  .uc-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }
}

/* ─── BILLING / PRICING ─── */
.pricing-hero {
  padding: 140px 0 48px;
  text-align: center;
}
.pricing-hero h1 {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 3rem;
  letter-spacing: -1px;
  margin-bottom: 16px;
}
.pricing-hero h1 .accent { color: var(--lime); }
.pricing-hero p {
  color: var(--gray-300);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.1rem;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 56px 0 88px;
}

.plan-card {
  position: relative;
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  border-radius: 14px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.plan-card:hover {
  transform: translateY(-4px);
  border-color: rgba(184, 224, 0, 0.4);
}

.plan-card.highlight {
  border: 2px solid var(--lime);
  box-shadow: 0 0 50px rgba(184, 224, 0, 0.18);
}

.plan-card.highlight::before {
  content: "MOST POPULAR";
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--lime);
  color: var(--ink);
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 0.7rem;
  letter-spacing: 2px;
  padding: 6px 12px;
  border-radius: 4px;
}

.plan-name {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 1.4rem;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.plan-tagline {
  color: var(--gray-300);
  font-size: 0.85rem;
  min-height: 40px;
  margin-bottom: 20px;
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 28px;
}

.plan-price .amount {
  font-family: "Arial Black", Arial, sans-serif;
  font-size: 2.6rem;
  color: var(--white);
  line-height: 1;
}

.plan-price .period {
  color: var(--gray-500);
  font-size: 0.85rem;
}

.plan-price.custom .amount { font-size: 1.4rem; }

.plan-features {
  list-style: none;
  padding: 0;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features li {
  position: relative;
  padding: 8px 0 8px 28px;
  border-bottom: 1px solid var(--gray-800);
  color: var(--gray-100);
  font-size: 0.9rem;
}

.plan-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 8px;
  color: var(--lime);
  font-weight: bold;
}

.plan-features li:last-child { border-bottom: none; }

.plan-cta {
  display: block;
  width: 100%;
  text-align: center;
  background: var(--lime);
  color: var(--ink);
  font-family: "Arial Black", Arial, sans-serif;
  letter-spacing: 1px;
  padding: 14px 20px;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.plan-cta:hover { background: var(--lime-dark); }

.plan-cta.outline {
  background: transparent;
  color: var(--lime);
  border: 1px solid var(--lime);
}
.plan-cta.outline:hover {
  background: var(--lime);
  color: var(--ink);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.faq-card {
  background: var(--gray-900);
  border-radius: 10px;
  padding: 24px;
  border: 1px solid var(--gray-800);
}

.faq-card h4 {
  color: var(--lime);
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.faq-card p {
  color: var(--gray-300);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* ─── BILLING DASHBOARD ─── */
.billing-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-top: 32px;
}

.billing-card {
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  border-radius: 12px;
  padding: 28px;
}

.billing-card h3 {
  font-family: "Arial Black", Arial, sans-serif;
  letter-spacing: 1px;
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--lime);
}

.usage-meter {
  height: 14px;
  background: var(--gray-800);
  border-radius: 7px;
  overflow: hidden;
  margin: 12px 0 8px;
}

.usage-meter-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--lime), var(--lime-dark));
  transition: width 0.4s ease;
}

.usage-meter-fill.warning { background: linear-gradient(90deg, #ff9900, #cc7700); }
.usage-meter-fill.danger  { background: linear-gradient(90deg, #ff4444, #aa2222); }

.usage-stats {
  display: flex;
  justify-content: space-between;
  color: var(--gray-300);
  font-size: 0.9rem;
}

.kv-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-800);
  font-size: 0.92rem;
}
.kv-row:last-child { border-bottom: none; }
.kv-row .k { color: var(--gray-300); }
.kv-row .v { color: var(--white); font-family: "Arial Black", Arial, sans-serif; }

.billing-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.btn-secondary {
  background: var(--gray-800);
  color: var(--white);
  padding: 10px 18px;
  border-radius: 6px;
  border: 1px solid var(--gray-700);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-secondary:hover { background: var(--gray-700); }

@media (max-width: 768px) {
  .plan-grid { grid-template-columns: 1fr; }
  .faq-grid  { grid-template-columns: 1fr; }
  .billing-grid { grid-template-columns: 1fr; }
}