/**
 * SkyLimit eSIM - Ultimate Design System
 * Premium, Sharp, Professional Typography & Design
 * Inspired by Trill Mobile & Airalo
 */

/* ==========================================================================
   CSS Variables - Design Tokens
   ========================================================================== */
:root {
  /* Primary Colors - SkyLimit Brand */
  --sl-primary-50: #EBF5FF;
  --sl-primary-100: #D6EBFF;
  --sl-primary-200: #ADD6FF;
  --sl-primary-300: #85C2FF;
  --sl-primary-400: #5CADFF;
  --sl-primary-500: #0066FF;
  --sl-primary-600: #0052CC;
  --sl-primary-700: #003D99;
  --sl-primary-800: #002966;
  --sl-primary-900: #001433;

  /* Accent Colors - Cyan */
  --sl-accent-400: #22D3EE;
  --sl-accent-500: #00D4FF;
  --sl-accent-600: #00B8DB;

  /* Neutral Colors */
  --sl-dark: #0F172A;
  --sl-gray-900: #1E293B;
  --sl-gray-800: #334155;
  --sl-gray-700: #475569;
  --sl-gray-600: #64748B;
  --sl-gray-500: #94A3B8;
  --sl-gray-400: #CBD5E1;
  --sl-gray-300: #E2E8F0;
  --sl-gray-200: #F1F5F9;
  --sl-gray-100: #F8FAFC;
  --sl-white: #FFFFFF;

  /* Success/Warning/Error */
  --sl-success: #10B981;
  --sl-warning: #F59E0B;
  --sl-error: #EF4444;

  /* Gradients */
  --sl-gradient-primary: linear-gradient(135deg, var(--sl-primary-500) 0%, var(--sl-accent-500) 100%);
  --sl-gradient-hero: linear-gradient(135deg, var(--sl-primary-600) 0%, #4F46E5 50%, var(--sl-accent-500) 100%);
  --sl-gradient-card: linear-gradient(180deg, var(--sl-white) 0%, var(--sl-gray-100) 100%);
  --sl-gradient-button: linear-gradient(135deg, var(--sl-primary-500) 0%, var(--sl-primary-600) 100%);

  /* Shadows */
  --sl-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --sl-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --sl-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --sl-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --sl-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --sl-shadow-glow: 0 0 40px rgba(0, 102, 255, 0.3);
  --sl-shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);

  /* Border Radius */
  --sl-radius-sm: 0.375rem;
  --sl-radius-md: 0.5rem;
  --sl-radius-lg: 0.75rem;
  --sl-radius-xl: 1rem;
  --sl-radius-2xl: 1.5rem;
  --sl-radius-full: 9999px;

  /* Transitions */
  --sl-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --sl-transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --sl-transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography Scale */
  --sl-text-xs: 0.75rem;
  --sl-text-sm: 0.875rem;
  --sl-text-base: 1rem;
  --sl-text-lg: 1.125rem;
  --sl-text-xl: 1.25rem;
  --sl-text-2xl: 1.5rem;
  --sl-text-3xl: 1.875rem;
  --sl-text-4xl: 2.25rem;
  --sl-text-5xl: 3rem;
  --sl-text-6xl: 3.75rem;
  --sl-text-7xl: 4.5rem;
}

/* ==========================================================================
   Base Typography - Sharp & Professional
   ========================================================================== */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  color: var(--sl-gray-900);
  line-height: 1.6;
  background-color: var(--sl-white);
}

h1, h2, h3, h4, h5, h6, .sl-heading {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--sl-dark);
}

h1, .sl-h1 { font-size: var(--sl-text-5xl); font-weight: 800; letter-spacing: -0.03em; }
h2, .sl-h2 { font-size: var(--sl-text-4xl); font-weight: 700; }
h3, .sl-h3 { font-size: var(--sl-text-2xl); font-weight: 600; }
h4, .sl-h4 { font-size: var(--sl-text-xl); font-weight: 600; }

@media (min-width: 768px) {
  h1, .sl-h1 { font-size: var(--sl-text-6xl); }
  h2, .sl-h2 { font-size: var(--sl-text-5xl); }
}

@media (min-width: 1024px) {
  h1, .sl-h1 { font-size: var(--sl-text-7xl); }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.sl-hero {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, #0052CC 0%, #0066FF 40%, #00B8DB 100%);
  overflow: hidden;
}

.sl-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.sl-hero-wave {
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
}

.sl-hero-wave svg {
  position: relative;
  display: block;
  width: calc(100% + 1.3px);
  height: 100px;
}

@media (min-width: 768px) {
  .sl-hero-wave svg {
    height: 150px;
  }
}

/* Floating Blob Shapes */
.sl-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.3;
  animation: float 8s ease-in-out infinite;
}

.sl-blob-1 {
  width: 400px;
  height: 400px;
  background: var(--sl-accent-500);
  top: 10%;
  right: -10%;
  animation-delay: 0s;
}

.sl-blob-2 {
  width: 300px;
  height: 300px;
  background: #8B5CF6;
  bottom: 20%;
  left: -5%;
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(5deg); }
}

/* ==========================================================================
   Phone Mockup
   ========================================================================== */
.sl-phone-mockup {
  position: relative;
  width: 280px;
  height: 580px;
  background: #1a1a1a;
  border-radius: 40px;
  padding: 12px;
  box-shadow: 
    0 50px 100px -20px rgba(0, 0, 0, 0.25),
    0 30px 60px -30px rgba(0, 0, 0, 0.3),
    inset 0 -3px 0 rgba(255, 255, 255, 0.1);
  animation: phoneFloat 6s ease-in-out infinite;
}

.sl-phone-mockup::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 28px;
  background: #000;
  border-radius: 20px;
  z-index: 10;
}

.sl-phone-screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, var(--sl-primary-500) 0%, var(--sl-primary-700) 100%);
  border-radius: 32px;
  overflow: hidden;
  position: relative;
}

@keyframes phoneFloat {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-20px) rotate(2deg); }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.sl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: var(--sl-text-base);
  font-weight: 600;
  border-radius: var(--sl-radius-xl);
  transition: all var(--sl-transition-fast);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.sl-btn-primary {
  background: var(--sl-gradient-button);
  color: var(--sl-white);
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.4);
}

.sl-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 102, 255, 0.5);
}

.sl-btn-white {
  background: var(--sl-white);
  color: var(--sl-primary-600);
  box-shadow: var(--sl-shadow-lg);
}

.sl-btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--sl-shadow-xl);
}

.sl-btn-outline {
  background: transparent;
  color: var(--sl-white);
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.sl-btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.sl-btn-lg {
  padding: 1rem 2.5rem;
  font-size: var(--sl-text-lg);
}

/* ==========================================================================
   Cards
   ========================================================================== */
.sl-card {
  background: var(--sl-white);
  border-radius: var(--sl-radius-2xl);
  box-shadow: var(--sl-shadow-card);
  transition: all var(--sl-transition-normal);
  overflow: hidden;
}

.sl-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--sl-shadow-xl);
}

.sl-plan-card {
  position: relative;
  padding: 1.5rem;
  border: 1px solid var(--sl-gray-200);
}

.sl-plan-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--sl-gradient-primary);
  transform: scaleX(0);
  transition: transform var(--sl-transition-normal);
}

.sl-plan-card:hover::before {
  transform: scaleX(1);
}

/* ==========================================================================
   Country Grid
   ========================================================================== */
.sl-country-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 1rem;
  background: var(--sl-white);
  border-radius: var(--sl-radius-xl);
  border: 1px solid var(--sl-gray-200);
  text-decoration: none;
  transition: all var(--sl-transition-fast);
}

.sl-country-card:hover {
  border-color: var(--sl-primary-500);
  box-shadow: 0 4px 20px rgba(0, 102, 255, 0.15);
  transform: translateY(-4px);
}

.sl-country-flag {
  font-size: 3rem;
  margin-bottom: 0.75rem;
}

.sl-country-name {
  font-weight: 600;
  color: var(--sl-gray-900);
  margin-bottom: 0.25rem;
}

.sl-country-price {
  font-size: var(--sl-text-sm);
  color: var(--sl-primary-500);
  font-weight: 600;
}

/* ==========================================================================
   Search Bar
   ========================================================================== */
.sl-search-container {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.sl-search-input {
  width: 100%;
  padding: 1.25rem 1.5rem 1.25rem 3.5rem;
  font-size: var(--sl-text-lg);
  border: 2px solid var(--sl-gray-200);
  border-radius: var(--sl-radius-2xl);
  background: var(--sl-white);
  transition: all var(--sl-transition-fast);
  box-shadow: var(--sl-shadow-lg);
}

.sl-search-input:focus {
  outline: none;
  border-color: var(--sl-primary-500);
  box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1), var(--sl-shadow-lg);
}

.sl-search-icon {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--sl-gray-500);
  width: 1.5rem;
  height: 1.5rem;
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.sl-feature-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sl-primary-50);
  border-radius: var(--sl-radius-xl);
  color: var(--sl-primary-500);
  margin-bottom: 1.5rem;
  transition: all var(--sl-transition-fast);
}

.sl-feature-card:hover .sl-feature-icon {
  background: var(--sl-primary-500);
  color: var(--sl-white);
  transform: scale(1.1);
}

/* ==========================================================================
   Trust Badge Bar
   ========================================================================== */
.sl-trust-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem 3rem;
  padding: 1.5rem 2rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--sl-radius-2xl);
}

.sl-trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--sl-white);
  font-weight: 500;
  font-size: var(--sl-text-sm);
}

.sl-trust-icon {
  width: 20px;
  height: 20px;
  color: #10B981;
}

/* ==========================================================================
   Steps / How It Works
   ========================================================================== */
.sl-step {
  position: relative;
  text-align: center;
  padding: 2rem;
}

.sl-step-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sl-gradient-primary);
  color: var(--sl-white);
  font-weight: 700;
  font-size: var(--sl-text-xl);
  border-radius: var(--sl-radius-full);
  margin: 0 auto 1.5rem;
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.4);
}

.sl-step-connector {
  position: absolute;
  top: 3.5rem;
  left: calc(50% + 40px);
  width: calc(100% - 80px);
  height: 2px;
  background: var(--sl-gray-200);
}

.sl-step:last-child .sl-step-connector {
  display: none;
}

/* ==========================================================================
   Testimonials
   ========================================================================== */
.sl-testimonial-card {
  padding: 2rem;
  background: var(--sl-white);
  border-radius: var(--sl-radius-2xl);
  box-shadow: var(--sl-shadow-card);
}

.sl-testimonial-quote {
  font-size: var(--sl-text-lg);
  color: var(--sl-gray-700);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.sl-testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.sl-testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--sl-radius-full);
  object-fit: cover;
}

.sl-testimonial-name {
  font-weight: 600;
  color: var(--sl-gray-900);
}

.sl-testimonial-location {
  font-size: var(--sl-text-sm);
  color: var(--sl-gray-500);
}

.sl-stars {
  display: flex;
  gap: 0.25rem;
  color: #FBBF24;
}

/* ==========================================================================
   Personalized Greeting
   ========================================================================== */
.sl-greeting {
  font-size: var(--sl-text-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sl-greeting-emoji {
  animation: wave 2s ease-in-out infinite;
}

@keyframes wave {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(20deg); }
  75% { transform: rotate(-10deg); }
}

/* ==========================================================================
   Animations - Scroll Triggered
   ========================================================================== */
.sl-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.sl-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

.sl-animate-delay-1 { transition-delay: 0.1s; }
.sl-animate-delay-2 { transition-delay: 0.2s; }
.sl-animate-delay-3 { transition-delay: 0.3s; }
.sl-animate-delay-4 { transition-delay: 0.4s; }

/* Fade in from left/right */
.sl-fade-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.sl-fade-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.sl-fade-left.visible,
.sl-fade-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale up animation */
.sl-scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.sl-scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.sl-footer {
  background: var(--sl-dark);
  color: var(--sl-gray-400);
  padding: 4rem 0 2rem;
}

.sl-footer-heading {
  color: var(--sl-white);
  font-weight: 600;
  margin-bottom: 1.5rem;
  font-size: var(--sl-text-base);
}

.sl-footer-link {
  display: block;
  color: var(--sl-gray-400);
  text-decoration: none;
  padding: 0.375rem 0;
  transition: color var(--sl-transition-fast);
}

.sl-footer-link:hover {
  color: var(--sl-white);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */
@media (max-width: 768px) {
  .sl-hero {
    min-height: auto;
    padding: 6rem 0 4rem;
  }
  
  .sl-phone-mockup {
    width: 220px;
    height: 460px;
    margin: 2rem auto;
  }
  
  .sl-trust-bar {
    gap: 1rem 2rem;
    padding: 1rem;
  }
  
  .sl-step-connector {
    display: none;
  }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.sl-gradient-text {
  background: var(--sl-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sl-section {
  padding: 5rem 0;
}

.sl-section-sm {
  padding: 3rem 0;
}

.sl-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .sl-container {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .sl-container {
    padding: 0 2rem;
  }
}

/* Badge */
.sl-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--sl-text-xs);
  font-weight: 600;
  border-radius: var(--sl-radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sl-badge-primary {
  background: var(--sl-primary-100);
  color: var(--sl-primary-700);
}

.sl-badge-success {
  background: #D1FAE5;
  color: #065F46;
}

.sl-badge-warning {
  background: #FEF3C7;
  color: #92400E;
}

/* App Store Buttons */
.sl-app-store-btn {
  display: inline-flex;
  height: 48px;
  transition: transform var(--sl-transition-fast);
}

.sl-app-store-btn:hover {
  transform: scale(1.05);
}

.sl-app-store-btn img {
  height: 100%;
  width: auto;
}