/* ==========================================================================
   OTax Liquid Glass Design System
   Enterprise B2B Dark Mode Aesthetic for Egyptian E-Invoicing & Tax Compliance
   ========================================================================== */

:root {
  --bg-dark: #0B0F1C;
  --bg-card: rgba(18, 26, 46, 0.65);
  --bg-card-liquid: rgba(26, 38, 66, 0.75);
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-glow: rgba(46, 142, 255, 0.35);
  --accent: #2E8EFF;
  --accent-glow: #00F2FE;
  --accent-2: #8A2BE2;
  --good: #00E676;
  --warn: #FFB300;
  --danger: #FF5252;
  --text: #EAF1FF;
  --text-muted: #93A2C4;
  --text-dim: #64748B;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-ar: 'Cairo', 'Segoe UI', Tahoma, sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--text);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

html[dir="rtl"] {
  font-family: var(--font-ar);
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  background: radial-gradient(circle at 50% -20%, #1A2B4C 0%, var(--bg-dark) 70%);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--accent);
  color: #fff;
  padding: 12px 20px;
  z-index: 10000;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus { top: 20px; }

/* Container & Grids */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Glassmorphism Classes */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}

.glass::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
}

.glass-liquid {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%), var(--bg-card-liquid);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transition: var(--transition);
}

.glass-liquid:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 242, 254, 0.6);
  box-shadow: 0 40px 90px rgba(46, 142, 255, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(11, 15, 28, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-glow) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  box-shadow: 0 0 20px rgba(46, 142, 255, 0.5);
}

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

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text);
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
}

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

.lang-switch {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}
.lang-switch:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #0062FF 100%);
  color: #fff;
  box-shadow: 0 10px 30px rgba(46, 142, 255, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(46, 142, 255, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  opacity: 0.4;
}
.orb.a { width: 500px; height: 500px; background: var(--accent); top: -100px; left: -100px; }
.orb.b { width: 450px; height: 450px; background: var(--accent-2); top: 100px; right: -100px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background: rgba(46, 142, 255, 0.12);
  border: 1px solid rgba(46, 142, 255, 0.3);
  color: var(--accent-glow);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--good);
  box-shadow: 0 0 10px var(--good);
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.grad-text {
  background: linear-gradient(135deg, #FFFFFF 0%, var(--accent-glow) 50%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Telemetry Console Card */
.telemetry-card {
  padding: 28px;
  border-radius: var(--radius-lg);
}

.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-glass);
  margin-bottom: 20px;
}

.telemetry-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--good);
  font-weight: 600;
}

.telemetry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.telemetry-box {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px;
  border-radius: var(--radius-md);
}

.telemetry-box label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.telemetry-box val {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

/* Section Common */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-top: 12px;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.15rem;
  color: var(--text-muted);
}

/* Impact Metrics Banner */
.metrics-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.metric-card {
  padding: 32px;
  text-align: center;
}

.metric-number {
  font-size: 2.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-glow) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.metric-label {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Bento Grid 4 Pillars */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.bento-card {
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.bento-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(46, 142, 255, 0.12);
  border: 1px solid rgba(46, 142, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-glow);
  margin-bottom: 24px;
}

.bento-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.bento-card p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.6;
}

/* CPA & Multi-Tenant Spotlight */
.cpa-banner {
  padding: 60px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.price-card {
  padding: 36px;
  display: flex;
  flex-direction: column;
}

.price-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.price-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 44px;
}

.price-features {
  list-style: none;
  margin-bottom: 32px;
  flex: 1;
}

.price-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text);
  margin-bottom: 14px;
}

/* Footer */
.footer {
  background: #070A14;
  border-top: 1px solid var(--border-glass);
  padding: 80px 0 40px;
  margin-top: 100px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  color: var(--text-dim);
}

/* Responsive */
@media (max-width: 992px) {
  .hero-grid, .cpa-banner, .bento-grid {
    grid-template-columns: 1fr;
  }
  .hero-title { font-size: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .hero-cta-group { flex-direction: column; width: 100%; }
  .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}