/* =====================================================================
   GREEN BOX ENERGY AUTOMATION - TANKON PRO OFFICIAL WEBSITE
   Theme: Sleek Dark / Cyber Neon Emerald / Modern Animated Hardware UI
   ===================================================================== */

:root {
  --bg-dark: #070a08;
  --bg-card: rgba(13, 20, 16, 0.75);
  --bg-card-hover: rgba(18, 30, 23, 0.85);
  --bg-secondary: #0c130f;
  
  --emerald-neon: #10b981;
  --emerald-bright: #34d399;
  --emerald-glow: rgba(16, 185, 129, 0.35);
  --emerald-subtle: rgba(16, 185, 129, 0.12);
  --emerald-border: rgba(16, 185, 129, 0.25);
  
  --text-main: #f0fdf4;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --lcd-blue-bg: #0c4a6e;
  --lcd-blue-text: #38bdf8;
  --lcd-blue-glow: rgba(56, 189, 248, 0.5);
  
  --accent-red: #ef4444;
  --accent-yellow: #f59e0b;
  
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.25);
  --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.6);
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Ambient Background Lights */
.glow-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.35;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #059669 0%, transparent 70%);
  top: -150px;
  right: -100px;
}

.orb-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #10b981 0%, transparent 70%);
  bottom: 20%;
  left: -200px;
  animation-duration: 22s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #047857 0%, transparent 70%);
  top: 45%;
  right: 15%;
  opacity: 0.2;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.1); }
  100% { transform: translate(-30px, 50px) scale(0.95); }
}

.grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(16, 185, 129, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 185, 129, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -1;
}

/* Announcement Top Bar */
.announcement-bar {
  background: linear-gradient(90deg, #064e3b, #052e16);
  border-bottom: 1px solid var(--emerald-border);
  padding: 8px 16px;
  font-size: 0.85rem;
  overflow: hidden;
  white-space: nowrap;
}

.marquee-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: #a7f3d0;
}

.marquee-content .dot {
  color: var(--emerald-neon);
}

/* Containers */
.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 10, 8, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--emerald-border);
  padding: 14px 0;
  transition: all var(--transition-fast);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-box {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #059669, #10b981);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #042f1a;
  box-shadow: 0 0 15px var(--emerald-glow);
}

.brand-title {
  display: block;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #ffffff;
}

.brand-sub {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--emerald-bright);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

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

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--emerald-neon);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-smooth);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #022013;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #34d399, #10b981);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(16, 185, 129, 0.6);
}

.btn-outline-glow {
  background: transparent;
  color: var(--emerald-bright);
  border: 1px solid var(--emerald-border);
  backdrop-filter: blur(10px);
}

.btn-outline-glow:hover {
  border-color: var(--emerald-neon);
  background: var(--emerald-subtle);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 30px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  transition: var(--transition-fast);
}

.mobile-drawer {
  display: none;
  flex-direction: column;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--emerald-border);
  padding: 20px;
  gap: 14px;
}

.drawer-link {
  color: var(--text-main);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 500;
  padding: 8px 0;
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--emerald-bright);
  margin-bottom: 24px;
}

.pulse-indicator {
  width: 8px;
  height: 8px;
  background: var(--emerald-neon);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--emerald-neon);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, #34d399 20%, #10b981 60%, #a7f3d0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 30px;
}

.hero-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid rgba(16, 185, 129, 0.15);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: #e2e8f0;
  font-weight: 500;
}

.h-icon {
  width: 18px;
  height: 18px;
  color: var(--emerald-bright);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 44px;
}

.hero-social-proof {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.proof-stat {
  display: flex;
  flex-direction: column;
}

.proof-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--emerald-bright);
  font-family: var(--font-mono);
}

.proof-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.proof-divider {
  width: 1px;
  height: 34px;
  background: rgba(255, 255, 255, 0.1);
}

/* Hero 3D Device Representation */
.device-card-3d {
  background: linear-gradient(145deg, #101c15, #080d0a);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.8), var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.device-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.terminal-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.device-brand-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--emerald-bright);
  letter-spacing: 1px;
}

.status-chip {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.live-chip {
  background: rgba(16, 185, 129, 0.15);
  color: var(--emerald-bright);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.blink-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--emerald-neon);
  animation: pulseDot 1.2s infinite;
}

/* Futuristic LCD Screen */
.lcd-screen-container {
  margin-bottom: 20px;
}

.lcd-glass {
  background: var(--lcd-blue-bg);
  border: 2px solid #0369a1;
  border-radius: var(--radius-sm);
  padding: 16px;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5), 0 0 15px var(--lcd-blue-glow);
  font-family: var(--font-mono);
  color: var(--lcd-blue-text);
}

.lcd-row-1 {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  font-size: 0.95rem;
  font-weight: 700;
}

.lcd-level-val {
  color: #bae6fd;
}

.lcd-bar-wrapper {
  background: rgba(0, 0, 0, 0.4);
  height: 12px;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 10px;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.lcd-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #0284c7, #38bdf8);
  box-shadow: 0 0 8px #38bdf8;
  transition: width 0.5s ease;
}

.lcd-row-2 {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
}

.pump-on { color: #4ade80; font-weight: 700; }
.pump-off { color: #94a3b8; font-weight: 600; }
.shield-active { color: #38bdf8; }

/* Ultrasonic Acoustic Simulation Zone */
.acoustic-wave-zone {
  background: rgba(0, 0, 0, 0.4);
  border: 1px dashed rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  margin-bottom: 20px;
}

.sensor-emitter {
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 2;
}

.sensor-nozzle {
  width: 44px;
  height: 20px;
  background: #334155;
  border-radius: 6px 6px 0 0;
  position: relative;
  display: flex;
  justify-content: center;
}

.sound-ring {
  position: absolute;
  top: 100%;
  width: 24px;
  height: 14px;
  border-bottom: 2px solid var(--emerald-neon);
  border-radius: 50%;
  opacity: 0;
  animation: soundPulse 2.4s infinite cubic-bezier(0.2, 0.8, 0.4, 1);
}

.sound-ring.r2 { animation-delay: 0.8s; }
.sound-ring.r3 { animation-delay: 1.6s; }

@keyframes soundPulse {
  0% { transform: scale(0.6) translateY(0); opacity: 0.8; }
  100% { transform: scale(3.5) translateY(90px); opacity: 0; }
}

.sensor-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--emerald-bright);
  margin-top: 6px;
}

.virtual-tank {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.water-surface {
  background: linear-gradient(180deg, rgba(6, 78, 59, 0.85), rgba(4, 47, 34, 0.95));
  border-top: 3px solid var(--emerald-neon);
  position: relative;
  transition: height 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 10px;
}

.water-wave {
  position: absolute;
  top: -4px;
  left: 0;
  width: 100%;
  height: 6px;
  background: rgba(52, 211, 153, 0.6);
  filter: blur(2px);
}

.surface-badge {
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--emerald-neon);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: #a7f3d0;
}

.hardware-specs-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.chip-spec {
  display: flex;
  flex-direction: column;
  text-align: center;
}

.chip-spec .label {
  font-size: 0.65rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.chip-spec .val {
  font-size: 0.78rem;
  font-weight: 700;
  color: #e2e8f0;
}

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

.section-header {
  margin-bottom: 54px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--emerald-bright);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

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

/* Simulator Section */
.simulator-section {
  background: linear-gradient(180deg, transparent, rgba(5, 46, 22, 0.2), transparent);
}

.sim-dashboard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.sim-controls-card, .sim-display-card {
  background: var(--bg-card);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  margin-bottom: 24px;
}

.control-group {
  margin-bottom: 28px;
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.control-header label {
  font-weight: 600;
  color: #e2e8f0;
}

.range-display {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--emerald-bright);
}

/* Custom Range Slider */
.custom-slider {
  width: 100%;
  -webkit-appearance: none;
  height: 8px;
  border-radius: 4px;
  background: #1e293b;
  outline: none;
  transition: opacity 0.2s;
}

.custom-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--emerald-bright);
  cursor: pointer;
  box-shadow: 0 0 12px var(--emerald-neon);
  border: 2px solid #064e3b;
}

.slider-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 8px;
  font-family: var(--font-mono);
}

.sim-presets {
  margin-bottom: 28px;
}

.preset-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.preset-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.btn-preset {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-preset:hover {
  border-color: var(--emerald-neon);
  background: var(--emerald-subtle);
  color: var(--emerald-bright);
}

.btn-preset-danger {
  border-color: rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.btn-preset-danger:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: #ef4444;
  color: #fca5a5;
}

.toggle-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 20px;
}

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

.toggle-item strong {
  font-size: 0.92rem;
  color: #fff;
  display: block;
}

.toggle-item p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch .slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #334155;
  transition: .3s;
  border-radius: 24px;
}

.switch .slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
}

.switch input:checked + .slider {
  background-color: var(--emerald-neon);
}

.switch input:checked + .slider:before {
  transform: translateX(22px);
}

/* Simulated LCD Character Matrix Unit */
.lcd-enclosure {
  background: #111a14;
  border: 3px solid #2d3748;
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.8);
  margin-bottom: 24px;
}

.enclosure-branding {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.matrix-lcd {
  background: #0284c7;
  background-image: 
    linear-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
  background-size: 3px 3px;
  color: #f0f9ff;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  padding: 16px 20px;
  border-radius: 4px;
  border: 4px solid #0369a1;
  box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.6), 0 0 20px rgba(2, 132, 199, 0.4);
  letter-spacing: 2px;
}

.matrix-line {
  min-height: 28px;
  display: flex;
  align-items: center;
}

.led-strip {
  display: flex;
  justify-content: space-around;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.led-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.led-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #334155;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.5);
  transition: all 0.3s;
}

.led-dot.active.led-green {
  background: #22c55e;
  box-shadow: 0 0 12px #22c55e;
}

.led-dot.active.led-blue {
  background: #38bdf8;
  box-shadow: 0 0 12px #38bdf8;
}

.led-dot.active.led-yellow {
  background: #facc15;
  box-shadow: 0 0 12px #facc15;
}

.led-dot.active.led-red {
  background: #ef4444;
  box-shadow: 0 0 12px #ef4444;
}

.led-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
}

/* Depth Visualizer */
.depth-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.d-stat {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 12px;
  border-radius: var(--radius-sm);
  text-align: center;
}

.d-label {
  display: block;
  font-size: 0.68rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.d-val {
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.text-green { color: var(--emerald-bright); }
.text-red { color: #f87171; }

.alert-banner {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  animation: shake 0.5s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  position: relative;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-card);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--emerald-neon);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.feature-card.highlight-card {
  border-color: var(--emerald-neon);
  background: linear-gradient(145deg, rgba(16, 185, 129, 0.12), rgba(13, 20, 16, 0.85));
}

.f-num {
  position: absolute;
  top: 24px;
  right: 28px;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: rgba(16, 185, 129, 0.4);
}

.f-icon-box {
  width: 52px;
  height: 52px;
  background: var(--emerald-subtle);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--emerald-bright);
  margin-bottom: 22px;
}

.f-icon-box svg {
  width: 26px;
  height: 26px;
}

.f-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.f-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
}

.f-footer-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--emerald-bright);
  font-weight: 600;
  padding: 4px 10px;
  background: rgba(16, 185, 129, 0.08);
  border-radius: var(--radius-full);
}

/* Comparison Table */
.table-responsive {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--emerald-border);
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, .comparison-table td {
  padding: 18px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.comparison-table th {
  background: rgba(6, 78, 59, 0.25);
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

.col-spec { width: 28%; }
.col-tankon {
  width: 34%;
  background: rgba(16, 185, 129, 0.15) !important;
  border-left: 2px solid var(--emerald-neon);
  border-right: 2px solid var(--emerald-neon);
}

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

.badge-rec {
  background: var(--emerald-neon);
  color: #022013;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.feature-name {
  font-weight: 600;
  color: #e2e8f0;
}

.val-tankon {
  background: rgba(16, 185, 129, 0.06);
  border-left: 2px solid var(--emerald-neon);
  border-right: 2px solid var(--emerald-neon);
  color: #f0fdf4;
  font-weight: 600;
}

.val-bad {
  color: var(--text-dim);
}

.check {
  color: var(--emerald-bright);
  font-weight: 900;
  margin-right: 6px;
}

.cross {
  color: #f87171;
  font-weight: 900;
  margin-right: 6px;
}

/* Applications Gallery */
.apps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  box-shadow: var(--shadow-card);
}

.app-img-wrap {
  position: relative;
  overflow: hidden;
  min-height: 380px;
}

.app-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.app-card:hover .app-img {
  transform: scale(1.03);
}

.app-overlay {
  position: absolute;
  top: 16px;
  left: 16px;
}

.app-badge {
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--emerald-neon);
  color: var(--emerald-bright);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.app-content {
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.app-title {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
}

.app-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.app-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-bullets li {
  font-size: 0.95rem;
  color: #e2e8f0;
  font-weight: 500;
}

/* Specs Section */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.specs-card {
  background: var(--bg-card);
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.specs-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--emerald-bright);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.specs-list dt {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 14px;
  font-family: var(--font-mono);
}

.specs-list dd {
  font-size: 0.98rem;
  font-weight: 600;
  color: #f1f5f9;
  margin-bottom: 4px;
}

/* Calculator Card */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  box-shadow: var(--shadow-card);
}

.calc-group {
  margin-bottom: 20px;
}

.calc-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: #e2e8f0;
  margin-bottom: 8px;
}

.calc-select, .calc-input {
  width: 100%;
  padding: 12px 16px;
  background: #0d1510;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.calc-select:focus, .calc-input:focus {
  border-color: var(--emerald-neon);
}

.calc-results {
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.res-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.res-label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.res-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
}

.highlight-res .res-val {
  color: var(--emerald-bright);
}

.total-item {
  border-bottom: none;
  padding-top: 16px;
}

.total-val {
  font-size: 1.8rem;
  color: var(--emerald-bright);
}

.res-badge {
  text-align: center;
  background: var(--emerald-subtle);
  border: 1px solid var(--emerald-border);
  color: var(--emerald-bright);
  font-weight: 700;
  padding: 8px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-top: 14px;
}

/* FAQ Accordion */
.faq-container {
  max-width: 840px;
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--emerald-neon);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.chevron {
  transition: transform 0.3s ease;
  color: var(--emerald-bright);
}

.faq-item.active .chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  padding-bottom: 20px;
}

.faq-answer p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Contact & Order Section */
.contact-card {
  background: linear-gradient(135deg, rgba(16, 28, 21, 0.9), rgba(8, 13, 10, 0.95));
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.contact-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
  line-height: 1.2;
}

.contact-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 30px;
}

.contact-points {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 36px;
}

.c-point {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  color: #e2e8f0;
}

.c-point svg {
  color: var(--emerald-bright);
  margin-top: 2px;
}

.c-point strong {
  display: block;
  font-size: 0.85rem;
  color: var(--emerald-bright);
}

.trust-badge-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.trust-item {
  font-size: 0.82rem;
  font-weight: 600;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Inquiry Form */
.inquiry-form {
  background: rgba(13, 20, 16, 0.85);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-md);
  padding: 32px;
}

.form-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: #cbd5e1;
  margin-bottom: 6px;
}

.form-group input, .form-group textarea, .form-select {
  width: 100%;
  padding: 12px 14px;
  background: #080d0a;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.92rem;
  outline: none;
  font-family: inherit;
  transition: border-color var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus, .form-select:focus {
  border-color: var(--emerald-neon);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.25);
}

.form-disclaimer {
  font-size: 0.78rem;
  color: var(--emerald-bright);
  text-align: center;
  margin-top: 14px;
}

/* Footer */
.footer {
  background: #040705;
  border-top: 1px solid var(--emerald-border);
  padding: 70px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

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

.footer-col li {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.online-pill {
  color: var(--emerald-bright);
  font-weight: 600;
  font-size: 0.78rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

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

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #064e3b;
  border: 1px solid var(--emerald-neon);
  color: #fff;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 999;
}

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

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .features-grid, .specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .app-card {
    grid-template-columns: 1fr;
  }
  .contact-card, .calc-card, .sim-dashboard {
    grid-template-columns: 1fr;
  }
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .mobile-drawer.open {
    display: flex;
  }
  .hero-title {
    font-size: 2.4rem;
  }
  .features-grid, .specs-grid {
    grid-template-columns: 1fr;
  }
  .footer-content {
    grid-template-columns: 1fr;
  }
  .bottom-row {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .preset-buttons {
    grid-template-columns: 1fr;
  }
}