/* ===== CSS VARIABLES & DESIGN SYSTEM ===== */
:root {
  /* Colors */
  --bg-color: #0B0D14;
  --bg-color-alt: #161A26;
  --text-color: #F8FAFC;
  --text-muted: #94A3B8;
  --primary-color: #3B82F6; /* Vibrant Blue */
  --primary-hover: #2563EB;
  --accent-color: #10B981; /* Emerald Green */
  --accent-glow: rgba(59, 130, 246, 0.5);
  
  /* Glassmorphism */
  --glass-bg: rgba(22, 26, 38, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  
  /* Layout */
  --max-width: 1200px;
  --nav-height: 80px;
  --radius-lg: 16px;
  --radius-md: 12px;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  overflow-x: hidden;
  background-image: radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.05), transparent 25%),
                    radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.05), transparent 25%);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.5rem; }

.gradient-text {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

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

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  gap: 8px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px var(--accent-glow);
}

.btn-secondary {
  background-color: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-color);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(11, 13, 20, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
}

.brand-accent {
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-color);
}

.nav-cta {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 8px 20px;
  border-radius: 50px;
  color: var(--text-color) !important;
}

.nav-cta:hover {
  background: var(--primary-color) !important;
  border-color: var(--primary-color) !important;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  width: 30px;
  height: 20px;
  position: relative;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-color);
  position: absolute;
  transition: 0.3s;
}

.nav-toggle span:nth-child(1) { top: 0; }
.nav-toggle span:nth-child(2) { top: 9px; }
.nav-toggle span:nth-child(3) { top: 18px; }

.nav-toggle.active span:nth-child(1) { top: 9px; transform: rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { top: 9px; transform: rotate(-45deg); }

/* ===== SECTIONS ===== */
section {
  padding: 100px 0;
  position: relative;
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

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

.hero-description {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: 40px;
  max-width: 500px;
}

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

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-phone-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 500px;
  background: var(--primary-color);
  filter: blur(100px);
  opacity: 0.3;
  z-index: -1;
  border-radius: 50%;
}

.hero-phone {
  background: var(--bg-color-alt);
  border: 1px solid var(--glass-border);
  padding: 12px;
  border-radius: 40px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.4);
  max-width: 320px;
  position: relative;
}

.hero-phone img {
  width: 100%;
  height: auto;
  border-radius: 30px;
  display: block;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 50px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary-color);
  margin-bottom: 24px;
}

/* ===== FEATURES GRID ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-top: 60px;
}

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

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-muted);
}

/* ===== FOOTER ===== */
footer {
  background: var(--bg-color-alt);
  padding: 60px 0 30px;
  border-top: 1px solid var(--glass-border);
}

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

.footer-brand p {
  color: var(--text-muted);
  margin-top: 16px;
  max-width: 300px;
}

.footer-links h4 {
  margin-bottom: 20px;
  color: white;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-muted);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 40px;
  }
  
  .hero-description {
    margin: 0 auto 40px;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--bg-color);
    flex-direction: column;
    padding: 30px 24px;
    gap: 24px;
    border-bottom: 1px solid var(--glass-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
}

/* Page Headers */
.page-header {
  padding: 160px 0 80px;
  text-align: center;
  background: linear-gradient(to bottom, rgba(59, 130, 246, 0.1), transparent);
}

/* Content Blocks */
.content-block {
  max-width: 800px;
  margin: 0 auto;
  color: var(--text-muted);
}

.content-block h2, .content-block h3 {
  color: var(--text-color);
  margin-top: 40px;
}

.content-block p, .content-block ul {
  margin-bottom: 20px;
}

.content-block ul {
  padding-left: 20px;
  list-style: disc;
}