/**
 * Benefit Exchange - Общие стили
 * Используются как на веб-сайте, так и в Telegram MiniApp
 */

:root {
  /* Основные цвета в стиле Liquid Glass */
  --primary-color: #007AFF;
  --primary-dark: #0051D5;
  --primary-light: #5AC8FA;
  --secondary-color: rgba(248, 249, 250, 0.8);
  --text-primary: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-light: #86868B;
  --border-color: rgba(0, 0, 0, 0.1);
  --success-color: #34C759;
  --error-color: #FF3B30;
  --warning-color: #FF9500;
  
  /* Градиенты Dark Theme */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  --gradient-light: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
  --gradient-background: linear-gradient(180deg, #1a1a2e 0%, #0d0d1a 50%, #050510 100%);
  
  /* Тени в стиле Liquid Glass */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  
  /* Радиусы (более закругленные) */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  
  /* Отступы */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  /* Шрифты */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 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: 2rem;
  --font-size-4xl: 2.5rem;
  
  /* Переходы */
  --transition-fast: 0.15s;
  --transition-base: 0.3s;
  --transition-slow: 0.5s;
}

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

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background: var(--gradient-background);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

/* Animated Shader Background Container */
#shader-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

#shader-background canvas {
  display: block;
  width: 100vw !important;
  height: 100vh !important;
  position: absolute;
  top: 0;
  left: 0;
}

/* Fallback анимированный фон (если WebGL не поддерживается или шейдер отключен) */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 20%, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(118, 75, 162, 0.06) 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
  pointer-events: none;
  z-index: -2;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, 30px) scale(1.1); }
}

/* Контейнеры */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.container-fluid {
  width: 100%;
  padding: var(--spacing-md);
  position: relative;
  z-index: 1;
}

/* Заголовки */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

/* Кнопки в стиле Liquid Glass */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  background: rgba(102, 126, 234, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: white;
  box-shadow: var(--shadow-glass), var(--shadow-glow);
  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 0.5s;
}

.btn:hover:not(:disabled)::before {
  left: 100%;
}

.btn:hover:not(:disabled) {
  background: rgba(102, 126, 234, 1);
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  opacity: 0.6;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-secondary {
  background: var(--secondary-color);
  color: var(--text-primary);
}

.btn-success {
  background: var(--success-color);
  color: white;
}

.btn-danger {
  background: var(--error-color);
  color: white;
}

.btn-block {
  width: 100%;
  display: block;
}

.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: 16px 32px;
  font-size: var(--font-size-lg);
}

/* Формы */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: all var(--transition-base);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text-primary);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: rgba(102, 126, 234, 0.5);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05), 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-light);
  opacity: 0.7;
}

.form-input[readonly] {
  background-color: var(--secondary-color);
  cursor: not-allowed;
}

.form-error {
  color: var(--error-color);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* Карточки - тёмная тема */
.card {
  background: rgba(20, 20, 35, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(102, 126, 234, 0.15);
  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, 0.4), transparent);
}

.card-header {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.card-body {
  padding: var(--spacing-md) 0;
  color: rgba(255, 255, 255, 0.9);
}

.card-body p,
.card-body strong {
  color: rgba(255, 255, 255, 0.95);
}

.card-body code {
  background: rgba(0, 0, 0, 0.2);
  padding: 4px 8px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.95);
  font-family: 'Monaco', 'Courier New', monospace;
}

.card-footer {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

/* Алерты */
.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.alert-warning {
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffeaa7;
}

.alert-info {
  background: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}

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

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

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

.text-primary {
  color: var(--primary-color);
}

.text-secondary {
  color: var(--text-secondary);
}

.text-success {
  color: var(--success-color);
}

.text-error {
  color: var(--error-color);
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }
.justify-center { justify-content: center; }
.align-center { align-items: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* Адаптивность */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-sm);
  }
  
  h1 {
    font-size: var(--font-size-3xl);
  }
  
  h2 {
    font-size: var(--font-size-2xl);
  }
  
  .card {
    padding: var(--spacing-md);
  }
}

/* Анимации */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s linear infinite;
}

/* Footer Styles - тёмная тема */
footer {
  background: rgba(10, 10, 20, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(102, 126, 234, 0.1);
  margin-top: 60px;
  padding: 40px 0 20px;
  position: relative;
  z-index: 1;
}

.footer-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 30px;
}

.footer-section h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 600;
}

.footer-section p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  text-decoration: none;
}

.footer-social {
  display: flex;
  align-items: center;
  justify-content: center;
}

.telegram-link {
  display: inline-block;
  transition: all 0.3s ease;
  border-radius: 50%;
  line-height: 0;
}

.telegram-link:hover {
  transform: translateY(-4px) scale(1.05);
  filter: drop-shadow(0 8px 16px rgba(42, 171, 238, 0.4));
}

.telegram-link svg {
  display: block;
  border-radius: 50%;
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  line-height: 1.8;
}

.footer-bottom p {
  margin: 6px 0;
}

/* Features Section */
.features-section {
  margin: 50px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 30px;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: rgba(20, 20, 35, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(102, 126, 234, 0.2);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(102, 126, 234, 0.15);
  border-color: rgba(102, 126, 234, 0.4);
  background: rgba(30, 30, 50, 0.8);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  filter: drop-shadow(0 4px 8px rgba(102, 126, 234, 0.3));
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 600;
}

.feature-card p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

@media (max-width: 768px) {
  footer {
    padding: 30px 0 15px;
    margin-top: 40px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 25px;
    margin-bottom: 20px;
  }

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