/* ==========================================================================
   AURA — ULTRA HIGH-TECH CYBERNETIC DESIGN SYSTEM
   Theme: Precision Deep Obsidian, Neural Particle Canvas & Luminous Laser Accents
   ========================================================================== */

:root {
  /* Core Obsidian Canvas */
  --bg-primary: #030509;
  --bg-secondary: #060a12;
  --bg-surface: #0a0f1c;
  --bg-card: rgba(10, 16, 28, 0.78);
  --bg-card-hover: rgba(15, 23, 42, 0.92);

  /* Luminous Cyber Accents */
  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.4);
  --accent-cyan-subtle: rgba(0, 240, 255, 0.08);
  --accent-violet: #8b5cf6;
  --accent-violet-glow: rgba(139, 92, 246, 0.4);
  --accent-indigo: #6366f1;
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.4);
  --accent-orange: #fb923c;

  /* Laser Tech Borders */
  --border-subtle: rgba(255, 255, 255, 0.09);
  --border-medium: rgba(255, 255, 255, 0.18);
  --border-cyan: rgba(0, 240, 255, 0.35);
  --border-cyan-bright: rgba(0, 240, 255, 0.75);

  /* Typography */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #334155;
}

/* ==========================================================================
   DYNAMIC INTERACTIVE TECH CANVAS & BACKGROUND
   ========================================================================== */
#tech-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

.tech-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  background: #030509;
  overflow: hidden;
}

/* Top Multi-Spectral Laser Spotlight */
.tech-spotlight-top {
  position: absolute;
  top: -25%;
  left: 50%;
  transform: translateX(-50%);
  width: 90vw;
  height: 70vh;
  background: radial-gradient(ellipse at center, rgba(0, 240, 255, 0.16) 0%, rgba(99, 102, 241, 0.22) 35%, rgba(139, 92, 246, 0.08) 65%, transparent 85%);
  filter: blur(75px);
  pointer-events: none;
}

.tech-spotlight-glow {
  position: absolute;
  bottom: -15%;
  right: 5%;
  width: 55vw;
  height: 55vh;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.09) 0%, rgba(16, 185, 129, 0.04) 50%, transparent 75%);
  filter: blur(85px);
  pointer-events: none;
}

/* Cybernetic Grid with Fading Masks */
.tech-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(0, 240, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 240, 255, 0.045) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, rgba(0, 0, 0, 1) 0%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, rgba(0, 0, 0, 1) 0%, transparent 90%);
}

.tech-horizon-beam {
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.8), rgba(0, 240, 255, 1), rgba(99, 102, 241, 0.8), transparent);
  box-shadow: 0 0 25px 2px rgba(0, 240, 255, 0.6);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   NAVIGATION BAR — CLEAN, MINIMALIST & HIGH-TECH
   ========================================================================== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(3, 5, 9, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.25s ease;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-svg-mark {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-svg-mark svg {
  width: 100%;
  height: 100%;
  overflow: visible;
  filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: 0.16em;
  color: #ffffff;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Precision Tech Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: #ffffff;
  color: #030509;
  border-color: #ffffff;
  font-weight: 600;
  box-shadow: 0 0 20px -3px rgba(255, 255, 255, 0.4);
}

.btn-primary:hover {
  background: #00f0ff;
  border-color: #00f0ff;
  color: #030509;
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.65);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border-color: var(--border-medium);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(0, 240, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.825rem;
}

.btn-lg {
  padding: 0.9rem 2rem;
  font-size: 1rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

/* ==========================================================================
   SECTIONS & TYPOGRAPHY
   ========================================================================== */
.section {
  padding: 6.5rem 0;
  position: relative;
}

.section-hero {
  padding: 9rem 0 5.5rem 0;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.text-center {
  text-align: center;
}

.heading-display {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: #ffffff;
}

.gradient-text-accent {
  background: linear-gradient(135deg, #00f0ff 0%, #38bdf8 50%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 25px rgba(0, 240, 255, 0.35));
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-cyan);
  margin-bottom: 0.85rem;
  display: inline-block;
  font-weight: 600;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  line-height: 1.2;
  color: #ffffff;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.075rem;
  max-width: 650px;
  margin: 0 auto 3rem auto;
  line-height: 1.7;
}

/* High-Tech Pill Badge */
.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.05);
  border: 1px solid var(--border-cyan);
  font-size: 0.775rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
  font-family: var(--font-mono);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulseLight 1.8s infinite;
}

@keyframes pulseLight {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.4); opacity: 1; filter: drop-shadow(0 0 6px #00f0ff); }
  100% { transform: scale(0.9); opacity: 0.8; }
}

/* ==========================================================================
   INTERACTIVE NEURAL VOICE & AI CONSOLE (HERO RIGHT)
   ========================================================================== */
.hero-console-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.85), 0 0 30px rgba(0, 240, 255, 0.15);
  backdrop-filter: blur(24px);
  position: relative;
  overflow: hidden;
}

.hero-console-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-violet), transparent);
}

.console-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
}

.console-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #e2e8f0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.console-status-live {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.725rem;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.12);
  padding: 3px 9px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(16, 185, 129, 0.35);
  font-weight: 600;
}

.waveform-box {
  background: rgba(3, 5, 10, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.waveform-header {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.725rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.waveform-bars {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  gap: 4px;
}

.wave-bar {
  flex: 1;
  background: linear-gradient(180deg, var(--accent-cyan) 0%, var(--accent-indigo) 100%);
  border-radius: 2px;
  min-height: 4px;
  animation: equalize 1.4s ease-in-out infinite alternate;
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
}

.wave-bar:nth-child(2) { animation-delay: 0.15s; }
.wave-bar:nth-child(3) { animation-delay: 0.35s; }
.wave-bar:nth-child(4) { animation-delay: 0.2s; }
.wave-bar:nth-child(5) { animation-delay: 0.45s; }
.wave-bar:nth-child(6) { animation-delay: 0.1s; }
.wave-bar:nth-child(7) { animation-delay: 0.5s; }
.wave-bar:nth-child(8) { animation-delay: 0.25s; }
.wave-bar:nth-child(9) { animation-delay: 0.4s; }
.wave-bar:nth-child(10) { animation-delay: 0.05s; }
.wave-bar:nth-child(11) { animation-delay: 0.3s; }
.wave-bar:nth-child(12) { animation-delay: 0.55s; }
.wave-bar:nth-child(13) { animation-delay: 0.18s; }
.wave-bar:nth-child(14) { animation-delay: 0.38s; }
.wave-bar:nth-child(15) { animation-delay: 0.12s; }
.wave-bar:nth-child(16) { animation-delay: 0.48s; }

@keyframes equalize {
  0% { height: 6px; opacity: 0.35; }
  50% { height: 46px; opacity: 1; }
  100% { height: 16px; opacity: 0.6; }
}

.console-metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.metric-cell {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  padding: 0.65rem;
  text-align: center;
}

.metric-cell-label {
  font-size: 0.675rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 0.25rem;
}

.metric-cell-val {
  font-family: var(--font-mono);
  font-size: 0.925rem;
  font-weight: 700;
  color: var(--text-primary);
}

.btn-test-voice {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--border-cyan);
  color: #fff;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-test-voice:hover {
  background: rgba(0, 240, 255, 0.2);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
  transform: translateY(-1px);
}

/* ==========================================================================
   SOLUTIONS SECTION — LUMINOUS HIGH-TECH CARDS (HÌNH 2 ĐƯỢC LỘT XÁC)
   ========================================================================== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2.5rem 2.25rem;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.5), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.solution-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-cyan);
  transform: translateY(-3px);
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.8), 0 0 30px rgba(0, 240, 255, 0.15);
}

.solution-card:hover::before {
  opacity: 1;
}

.solution-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.12), rgba(99, 102, 241, 0.12));
  border: 1px solid var(--border-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

.solution-card:hover .solution-icon-box {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
}

.solution-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.35rem;
  letter-spacing: -0.02em;
}

.solution-subtitle {
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  margin-bottom: 1.15rem;
  font-weight: 500;
}

.solution-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.solution-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.solution-pill {
  font-family: var(--font-mono);
  font-size: 0.725rem;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  background: rgba(0, 240, 255, 0.04);
  border: 1px solid rgba(0, 240, 255, 0.2);
  color: #cbd5e1;
  font-weight: 500;
  transition: all 0.2s ease;
}

.solution-card:hover .solution-pill {
  border-color: rgba(0, 240, 255, 0.4);
  color: #fff;
}

/* ==========================================================================
   METRICS COUNTER SECTION (HÌNH 1 ĐƯỢC LỘT XÁC KHÔNG BUỒN TẺ)
   ========================================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin: 3.5rem 0;
}

.stat-item {
  padding: 2.25rem 1.75rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  text-align: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
}

.stat-item:hover {
  border-color: var(--border-cyan);
  transform: translateY(-3px);
  box-shadow: 0 15px 35px -10px rgba(0, 240, 255, 0.2);
}

/* Corner crosshair accents for cyber precision */
.stat-item::before {
  content: '+';
  position: absolute;
  top: 8px;
  left: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(0, 240, 255, 0.4);
}
.stat-item::after {
  content: '+';
  position: absolute;
  bottom: 8px;
  right: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(0, 240, 255, 0.4);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.85rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.75rem;
  letter-spacing: -0.04em;
  color: #ffffff;
}

.stat-number.cyan-glow {
  color: var(--accent-cyan);
  text-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
}

.stat-number.violet-glow {
  color: #c084fc;
  text-shadow: 0 0 25px rgba(192, 132, 252, 0.5);
}

.stat-number.emerald-glow {
  color: var(--accent-emerald);
  text-shadow: 0 0 25px rgba(16, 185, 129, 0.5);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Mini Pulse Indicator inside metric cards */
.metric-indicator-bar {
  display: flex;
  justify-content: center;
  gap: 3px;
  margin-top: 1rem;
}

.indicator-dot {
  width: 14px;
  height: 2px;
  border-radius: 1px;
  background: rgba(0, 240, 255, 0.2);
}

.indicator-dot.active {
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

/* ==========================================================================
   CODE PLAYGROUND
   ========================================================================== */
.code-playground {
  background: #060912;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.85);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-subtle);
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
}

.lang-tabs {
  display: flex;
  gap: 0.35rem;
}

.lang-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.775rem;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  color: #fff;
}

.lang-btn.active {
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.08);
  border-color: var(--border-cyan);
}

.btn-copy {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.725rem;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-copy:hover {
  color: #fff;
  border-color: var(--border-medium);
}

.code-body {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
  color: #e2e8f0;
}

.code-body pre {
  margin: 0;
}

.hl-keyword { color: #f472b6; }
.hl-function { color: #60a5fa; }
.hl-string { color: #34d399; }
.hl-comment { color: #64748b; font-style: italic; }
.hl-variable { color: #fbbf24; }
.hl-number { color: #38bdf8; }

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-top: 3rem;
}

.price-card {
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(20px);
}

.price-card.featured {
  border-color: var(--border-cyan);
  background: rgba(14, 22, 38, 0.95);
  box-shadow: 0 0 35px -10px rgba(0, 240, 255, 0.25);
}

.price-badge {
  position: absolute;
  top: -10px;
  right: 20px;
  background: var(--accent-cyan);
  color: #030509;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
}

.price-tier {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.35rem;
}

.price-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 40px;
}

.price-figure {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 1.75rem;
}

.price-period {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-muted);
}

.price-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.price-feature {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #cbd5e1;
}

.feature-check {
  color: var(--accent-cyan);
  font-weight: bold;
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.825rem;
  font-weight: 600;
  color: #cbd5e1;
  margin-bottom: 0.4rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 0.95rem;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
  background: rgba(255, 255, 255, 0.05);
}

.form-textarea {
  resize: vertical;
  min-height: 110px;
}

/* ==========================================================================
   FOOTER (LỘT XÁC HOÀN TOÀN — CHUẨN SAAS TOÀN CẦU)
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: rgba(2, 4, 7, 0.98);
  padding: 5rem 0 2.5rem 0;
  margin-top: 6rem;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3.5rem;
  margin-bottom: 3.5rem;
}

.footer-brand-desc {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 1.25rem 0 1.25rem 0;
  max-width: 320px;
}

.footer-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: var(--accent-emerald);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 500;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  font-weight: 600;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.footer-link:hover {
  color: var(--accent-cyan);
  transform: translateX(2px);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.825rem;
  color: var(--text-muted);
}

/* Toast */
.aura-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 0.75rem 1.25rem;
  background: rgba(10, 16, 28, 0.95);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.825rem;
  font-family: var(--font-mono);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7), 0 0 15px rgba(0, 240, 255, 0.2);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.25s ease;
}

.aura-toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Responsive */
@media (max-width: 1024px) {
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .section-hero {
    padding: 6.5rem 0 3rem 0;
  }
  .section-title {
    font-size: 2rem;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}