:root {
  --bg-primary: #0F172A;      /* Alertino Dark Background */
  --bg-secondary: #1E293B;    /* Alertino Dark Surface */
  --bg-card: #1E293B;
  --color-primary: #2563EB;   /* Alertino Primary Blue */
  --color-primary-hover: #1d4ed8;
  --color-accent: #F59E0B;    /* Alertino Warning / Orange Accent */
  --color-success: #10B981;   /* Alertino Success Green */
  --color-error: #EF4444;     /* Alertino Error Red */
  --text-primary: #FFFFFF;
  --text-secondary: #94A3B8;
  --border-color: #334155;    /* Alertino Card Border */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

/* Header & Navbar */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 800;
  font-size: 24px;
  color: var(--text-primary);
  gap: 8px;
}

.logo-bell {
  color: var(--color-accent);
  animation: swing 3s infinite ease-in-out;
}

@keyframes swing {
  0%, 100% { transform: rotate(0); }
  10% { transform: rotate(15deg); }
  20% { transform: rotate(-10deg); }
  30% { transform: rotate(5deg); }
  40% { transform: rotate(-5deg); }
  50% { transform: rotate(0); }
}

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

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

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

.nav-links a.active {
  color: var(--text-primary);
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 4px;
}

.nav-links .nav-login-btn {
  background-color: var(--color-primary);
  color: white !important;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
  border: 1px solid var(--color-primary);
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.nav-links .nav-login-btn:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 28px;
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.18) 0%, transparent 50%),
              radial-gradient(circle at 10% 80%, rgba(245, 158, 11, 0.08) 0%, transparent 40%);
}

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

.hero-text h1 {
  font-size: 48px;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-text h1 span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-text p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: #2d3748;
  transform: translateY(-2px);
}

/* Phone Mockup Frame */
.hero-mockup {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mock {
  position: relative;
  width: 300px;
  height: 600px;
  background-color: #000;
  border-radius: 40px;
  border: 10px solid #334155;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  padding: 30px 16px 16px;
  font-family: var(--font-sans);
}

.phone-notch {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 18px;
  background-color: #000;
  border-radius: 10px;
  z-index: 10;
}

.phone-app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.phone-app-header h3 {
  font-size: 16px;
  font-weight: 700;
}

.phone-app-card {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--color-primary);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.phone-app-card.alert {
  border-left-color: var(--color-accent);
}

.card-title {
  font-size: 12px;
  font-weight: 700;
}

.card-subtitle {
  font-size: 10px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.phone-nav-bar {
  margin-top: auto;
  display: flex;
  justify-content: space-around;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
  font-size: 18px;
  color: var(--text-secondary);
}

.phone-nav-bar i.active {
  color: var(--color-primary);
}

/* Interactive Screenshots Section */
.showcase-section {
  padding: 100px 0;
  background-color: var(--bg-secondary);
}

.showcase-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.showcase-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.showcase-tab {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  text-align: left;
  transition: all 0.3s ease;
}

.showcase-tab.active {
  border-color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.15);
  transform: translateX(10px);
}

.showcase-tab h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.showcase-tab h3 i {
  color: var(--text-secondary);
}

.showcase-tab.active h3 i {
  color: var(--color-primary);
}

.showcase-tab p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Interactive Screen States */
.screen-content {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.camera-preview {
  position: relative;
  background: radial-gradient(circle, #334155 0%, #000 100%);
  flex: 1;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid var(--border-color);
}

.scan-laser {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent);
  animation: laserSweep 3s infinite ease-in-out;
}

@keyframes laserSweep {
  0%, 100% { top: 10%; }
  50% { top: 90%; }
}

.scan-target {
  width: 140px;
  height: 90px;
  border: 2px dashed rgba(255, 255, 255, 0.5);
  border-radius: 6px;
  position: relative;
}

.scan-text {
  position: absolute;
  bottom: 10px;
  width: 100%;
  text-align: center;
  font-size: 10px;
  background-color: rgba(0, 0, 0, 0.6);
  padding: 4px 0;
}

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

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.setting-info span {
  display: block;
  font-size: 12px;
  font-weight: 600;
}

.setting-info small {
  font-size: 9px;
  color: var(--text-secondary);
}

.toggle-switch {
  width: 36px;
  height: 20px;
  background-color: var(--color-primary);
  border-radius: 20px;
  position: relative;
  cursor: pointer;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  background-color: #fff;
  border-radius: 50%;
  top: 2px;
  right: 2px;
  transition: all 0.2s ease;
}

.toggle-switch.off {
  background-color: #475569;
}

.toggle-switch.off::after {
  right: auto;
  left: 2px;
}

/* How It Works Section */
.workflow-section {
  padding: 100px 0;
  background-color: var(--bg-primary);
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
}

.workflow-step {
  text-align: center;
  position: relative;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 40px 24px;
  border-radius: 20px;
  transition: transform 0.3s ease;
}

.workflow-step:hover {
  transform: translateY(-6px);
}

.step-num {
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  margin: -60px auto 24px;
  border: 4px solid var(--bg-primary);
  box-shadow: var(--shadow-md);
}

.workflow-step h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.workflow-step p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* 2026 Core Tech Features */
.tech-section {
  padding: 100px 0;
  background: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.tech-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  gap: 24px;
  transition: all 0.3s ease;
}

.tech-card:hover {
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: 0 10px 30px -10px rgba(37, 99, 235, 0.15);
}

.tech-icon {
  font-size: 32px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.tech-card h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
}

.tech-card p {
  color: var(--text-secondary);
  font-size: 15px;
}

.tech-tag {
  display: inline-block;
  background-color: rgba(37, 99, 235, 0.15);
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

/* Features Section */
.features {
  padding: 100px 0;
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 18px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.feature-card {
  background-color: var(--bg-card);
  padding: 32px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-primary);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 24px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* CTA / Download Section */
.download-cta {
  padding: 100px 0;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 20px;
}

.cta-content p {
  color: var(--text-secondary);
  font-size: 18px;
  margin-bottom: 40px;
}

.store-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background-color: #000;
  color: white;
  border: 1px solid var(--border-color);
  padding: 12px 24px;
  border-radius: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
  width: 200px;
  text-align: left;
}

.store-btn:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.store-btn-icon {
  font-size: 32px;
}

.store-btn-text span {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.store-btn-text strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
}

/* Legal Document Styling (Privacy Page) */
.legal-content {
  padding: 140px 0 100px;
}

.legal-box {
  background-color: var(--bg-secondary);
  padding: 48px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  max-width: 800px;
  margin: 0 auto;
}

.legal-box h1 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
}

.legal-date {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.legal-box h2 {
  font-size: 22px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 16px;
}

.legal-box p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.legal-box ul {
  color: var(--text-secondary);
  margin-bottom: 24px;
  padding-left: 20px;
}

.legal-box li {
  margin-bottom: 8px;
}

/* Footer */
footer {
  background-color: #070a10;
  padding: 60px 0 30px;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  color: var(--text-primary);
  font-weight: 800;
  font-size: 20px;
  margin-bottom: 16px;
}

.footer-col h4 {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 20px;
}

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

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

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  flex-wrap: wrap;
  gap: 20px;
}

/* Mobile Responsive */
@media (max-width: 968px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .btn-group {
    justify-content: center;
  }
  .hero-mockup {
    order: -1;
  }
  .showcase-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .tech-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .legal-box {
    padding: 24px;
  }
  .hero-text h1 {
    font-size: 36px;
  }
  .workflow-steps {
    grid-template-columns: 1fr;
    gap: 60px;
  }
}

.lang-select-dropdown {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s ease;
}

.lang-select-dropdown:hover {
  border-color: var(--color-primary);
}