/* Design System - IPTV Modern */
:root {
  /* Cores Modernas */
  --primary-50: #f0fdf4;
  --primary-100: #dcfce7;
  --primary-500: #22c55e;
  --primary-600: #16a34a;
  --primary-700: #15803d;
  
  --neutral-0: #ffffff;
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;
  
  --accent-400: #34d399;
  --accent-500: #10b981;
  --accent-600: #059669;
  
  --warning-400: #fbbf24;
  --warning-500: #f59e0b;
  
  --error-400: #f87171;
  --error-500: #ef4444;
  
  /* Background Dark Theme */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: rgba(31, 41, 55, 0.7);
  --bg-glass: rgba(17, 24, 39, 0.6);
  
  /* Text Colors */
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --text-accent: var(--primary-500);
  
  /* Gradientes */
  --gradient-primary: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  --gradient-secondary: linear-gradient(135deg, var(--neutral-800), var(--neutral-900));
  --gradient-glow: radial-gradient(circle at center, rgba(34, 197, 94, 0.15) 0%, transparent 70%);
  
  /* Tipografia */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Espaçamentos */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Bordas */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Sombras */
  --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, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(34, 197, 94, 0.3);
  
  /* Animações */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 350ms;
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --max-width: 1280px;
  --header-height: 80px;
}

/* Reset e Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.heading-1 {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.heading-2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.heading-3 {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  line-height: 1.3;
}

.heading-4 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  line-height: 1.4;
}

.text-lg {
  font-size: var(--font-size-lg);
  line-height: 1.7;
}

.text-base {
  font-size: var(--font-size-base);
  line-height: 1.6;
}

.text-sm {
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

/* Componentes Base */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
}

/* Botões Modernos */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--duration-slow) var(--ease-out);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--neutral-0);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

/* Cards Modernos */
.card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  backdrop-filter: blur(10px);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
  border-color: rgba(34, 197, 94, 0.3);
}

.card-glow {
  position: relative;
}

.card-glow::after {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
  z-index: -1;
}

.card-glow:hover::after {
  opacity: 0.3;
}

/* Grid Responsivo */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

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

/* Animações */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Utilitários */
.text-center {
  text-align: center;
}

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Glass Effect */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Glow Effects */
.glow {
  position: relative;
}

.glow::before {
  content: '';
  position: absolute;
  inset: -20px;
  background: var(--gradient-glow);
  filter: blur(40px);
  z-index: -1;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-4);
  }
  
  .section {
    padding: var(--space-16) 0;
  }
  
  .heading-1 {
    font-size: var(--font-size-4xl);
  }
  
  .heading-2 {
    font-size: var(--font-size-3xl);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .btn {
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-sm);
  }
  
  .card {
    padding: var(--space-6);
  }
}

@media (max-width: 480px) {
  .heading-1 {
    font-size: var(--font-size-3xl);
  }
  
  .heading-2 {
    font-size: var(--font-size-2xl);
  }
  
  .section {
    padding: var(--space-12) 0;
  }
}