/* ===== CSS Variables ===== */
:root {
  --primary: #0066FF;
  --primary-dark: #0052CC;
  --secondary: #00D4FF;
  --accent: #FFD700;
  --dark: #0a0a1a;
  --dark-lighter: #12122a;
  --text: #ffffff;
  --text-muted: #a0a0b0;
  --gradient-primary: linear-gradient(135deg, #0066FF 0%, #00D4FF 100%);
  --gradient-accent: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a1a 0%, #1a1a3a 100%);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(0, 102, 255, 0.3);
  --radius: 16px;
  --radius-sm: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 24px;
  background: rgba(10, 10, 26, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 24px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

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

.nav-cta {
  background: var(--gradient-primary);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  color: white !important;
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  padding: 120px 24px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at top center, rgba(0, 102, 255, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at bottom right, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
}

.lightning-effect {
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 300px;
  background: linear-gradient(180deg, transparent, var(--secondary), transparent);
  opacity: 0;
  animation: lightning 4s infinite;
}

.lightning-effect.delay {
  left: 60%;
  animation-delay: 2s;
}

@keyframes lightning {
  0%, 95%, 100% { opacity: 0; }
  96%, 98% { opacity: 1; }
  97% { opacity: 0.5; }
}

.hero-container {
  max-width: 800px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid rgba(255, 215, 0, 0.3);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero-note {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 16px;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 102, 255, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-large {
  padding: 20px 40px;
  font-size: 18px;
}

.btn-icon {
  display: flex;
  align-items: center;
}

/* ===== Hero Preview ===== */
.hero-preview {
  margin-top: 60px;
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 700px;
}

.preview-window {
  background: var(--dark-lighter);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.preview-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.preview-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.preview-dots span:nth-child(1) { background: #ff5f56; }
.preview-dots span:nth-child(2) { background: #ffbd2e; }
.preview-dots span:nth-child(3) { background: #27ca40; }

.preview-title {
  font-size: 13px;
  color: var(--text-muted);
}

.preview-content {
  padding: 20px;
}

.mailspark-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(93, 211, 232, 0.3) 0%, rgba(135, 206, 235, 0.3) 100%);
  border: 2px solid rgba(255, 215, 0, 0.5);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.ms-logo {
  font-weight: 800;
  font-size: 14px;
  color: #1a1a2e;
  background: rgba(255, 255, 255, 0.9);
  padding: 4px 8px;
  border-radius: 6px;
}

.ms-dropdown {
  background: rgba(255, 255, 255, 0.8);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  color: #1a1a2e;
  font-weight: 500;
}

.ms-btn {
  background: linear-gradient(135deg, #4a90d9 0%, #357abd 100%);
  color: white;
  border: none;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  margin-left: auto;
}

.email-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.email-line {
  height: 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
}

.email-line.short { width: 40%; }
.email-line.medium { width: 70%; }

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

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  margin-bottom: 16px;
}

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

/* ===== Features Section ===== */
.features {
  padding: 120px 24px;
  background: var(--dark-lighter);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.3s;
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(0, 102, 255, 0.3);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

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

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

/* ===== How It Works ===== */
.how-it-works {
  padding: 120px 24px;
}

.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 250px;
  max-width: 300px;
  text-align: center;
  padding: 32px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
}

.step-number {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 800;
  margin: 0 auto 20px;
}

.step h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.step-arrow {
  font-size: 32px;
  color: var(--primary);
}

/* ===== Pricing ===== */
.pricing {
  padding: 120px 24px;
  background: var(--dark-lighter);
}

.pricing-cards {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.pricing-card {
  flex: 1;
  max-width: 380px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 40px;
  position: relative;
}

.pricing-card.featured {
  background: rgba(0, 102, 255, 0.1);
  border-color: rgba(0, 102, 255, 0.3);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.pricing-header {
  text-align: center;
  margin-bottom: 32px;
}

.pricing-header h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.pricing-price {
  font-size: 56px;
  font-weight: 800;
}

.pricing-price span {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-muted);
}

.pricing-header p {
  color: var(--text-muted);
  margin-top: 8px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-card .btn {
  width: 100%;
  justify-content: center;
}

/* ===== CTA Section ===== */
.cta {
  padding: 120px 24px;
  text-align: center;
  background: radial-gradient(ellipse at center, rgba(0, 102, 255, 0.15) 0%, transparent 70%);
}

.cta h2 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta p {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ===== Footer ===== */
.footer {
  padding: 60px 24px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  font-size: 24px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  color: var(--text-muted);
  margin-top: 12px;
}

.footer-links {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.footer-column a {
  display: block;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-size: 14px;
  transition: color 0.2s;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .hero {
    padding-top: 100px;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .steps {
    flex-direction: column;
  }
  
  .step-arrow {
    transform: rotate(90deg);
  }
  
  .mailspark-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .ms-btn {
    margin-left: 0;
    width: 100%;
    margin-top: 12px;
  }
  
  .footer-container {
    flex-direction: column;
  }
  
  .footer-links {
    gap: 32px;
  }
}