/* ============================================
   Modern Payment Gateway - Dark Theme
   Responsive Design with Glassmorphism
   RTL & LTR Support
   ============================================ */

/* ============================================
   CSS Variables - Design Tokens
   ============================================ */
:root {
  /* Dark Theme Colors */
  --color-bg-primary: #0a0e27;
  --color-bg-secondary: #151b3d;
  --color-bg-tertiary: #1e2749;
  --color-bg-glass: rgba(30, 39, 73, 0.7);
  --color-bg-glass-light: rgba(30, 39, 73, 0.4);

  /* Accent Colors */
  --color-accent-primary: #6366f1;
  --color-accent-secondary: #8b5cf6;
  --color-accent-success: #10b981;
  --color-accent-warning: #f59e0b;
  --color-accent-error: #ef4444;

  /* Text Colors */
  --color-text-primary: #f8fafc;
  --color-text-secondary: #cbd5e1;
  --color-text-tertiary: #94a3b8;
  --color-text-muted: #64748b;

  /* Gradient Colors */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-purple: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.4);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

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

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Fonts */
  --font-arabic: 'Cairo', 'Tajawal', sans-serif;
  --font-english: 'Inter', 'Roboto', sans-serif;
}

/* ============================================
   Global Styles
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

/* Animated Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
  z-index: -1;
  animation: backgroundPulse 15s ease-in-out infinite;
}

@keyframes backgroundPulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.8;
  }
}

/* English Language Support */
body.lang-en {
  font-family: var(--font-english);
  direction: ltr;
}

/* ============================================
   Container & Layout
   ============================================ */
.payment-container {
  max-width: 500px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* ============================================
   Language Switcher
   ============================================ */
.language-switcher {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1000;
  display: flex;
  gap: var(--spacing-sm);
  background: var(--color-bg-glass);
  backdrop-filter: blur(10px);
  padding: var(--spacing-sm);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
}

body[dir="rtl"] .language-switcher {
  right: auto;
  left: var(--spacing-lg);
}

.lang-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.875rem;
  font-weight: 500;
}

.lang-btn:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-glass-light);
}

.lang-btn.active {
  background: var(--gradient-primary);
  color: white;
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow);
}

/* ============================================
   Logo & Branding
   ============================================ */
.payment-logo {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  animation: fadeInDown 0.6s ease-out;
}

.payment-logo img {
  max-width: 280px;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
  transition: transform var(--transition-base);
}

.payment-logo img:hover {
  transform: scale(1.05);
}

/* ============================================
   Payment Card - Glassmorphism
   ============================================ */
.payment-card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  width: 100%;
  box-shadow: var(--shadow-xl);
  animation: fadeInUp 0.6s ease-out;
  position: relative;
  overflow: hidden;
}

.payment-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

/* ============================================
   Card Header
   ============================================ */
.payment-card-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.payment-card-title {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.payment-card-subtitle {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

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

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-secondary);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  font-size: 1rem;
  transition: all var(--transition-base);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: var(--color-bg-tertiary);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

/* OTP Input Special Styling */
.otp-input {
  text-align: center;
  font-size: 1.5rem;
  letter-spacing: 0.5rem;
  font-weight: 600;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

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

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: 1.125rem;
}

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

.btn-secondary:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-accent-primary);
}

.btn-text {
  background: transparent;
  color: var(--color-accent-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 500;
  text-decoration: none;
}

.btn-text:hover {
  color: var(--color-accent-secondary);
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-1px);
}

/* Loading State */
.btn-loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ============================================
   Payment Method Buttons
   ============================================ */
.payment-methods {
  margin-top: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.payment-method-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: var(--spacing-lg) 0;
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
}

.payment-method-divider::before,
.payment-method-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.payment-method-divider span {
  padding: 0 var(--spacing-md);
}

.btn-apple-pay {
  background: #000;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-apple-pay:hover {
  background: #1a1a1a;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-google-pay {
  background: white;
  color: #3c4043;
  border: 1px solid #dadce0;
}

.btn-google-pay:hover {
  background: #f8f9fa;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-card-pay {
  background: var(--gradient-purple);
  color: white;
}

.btn-card-pay:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(139, 92, 246, 0.4);
}

/* Payment Icons */
.payment-icon {
  width: 24px;
  height: 24px;
}

/* ============================================
   Info Box
   ============================================ */
.info-box {
  background: var(--color-bg-secondary);
  border-left: 4px solid var(--color-accent-primary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-lg);
}

body[dir="rtl"] .info-box {
  border-left: none;
  border-right: 4px solid var(--color-accent-primary);
}

.info-box-title {
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.info-box-content {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* ============================================
   OTP Timer
   ============================================ */
.otp-timer {
  text-align: center;
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
}

.otp-timer-label {
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.otp-timer-value {
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-variant-numeric: tabular-nums;
}

.otp-timer.expired .otp-timer-value {
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   Alert Messages
   ============================================ */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  animation: slideInDown 0.3s ease-out;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--color-accent-success);
  color: var(--color-accent-success);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-accent-error);
  color: var(--color-accent-error);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--color-accent-warning);
  color: var(--color-accent-warning);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablets */
@media (max-width: 768px) {
  .payment-container {
    padding: var(--spacing-lg);
  }

  .payment-card {
    padding: var(--spacing-xl);
  }

  .payment-card-title {
    font-size: 1.25rem;
  }

  .language-switcher {
    top: var(--spacing-md);
    right: var(--spacing-md);
  }

  body[dir="rtl"] .language-switcher {
    right: auto;
    left: var(--spacing-md);
  }
}

/* Mobile */
@media (max-width: 480px) {
  .payment-container {
    padding: var(--spacing-md);
  }

  .payment-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
  }

  .payment-logo img {
    max-width: 200px;
  }

  .payment-card-title {
    font-size: 1.125rem;
  }

  .form-input {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  .btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
  }

  .otp-timer-value {
    font-size: 1.5rem;
  }

  .language-switcher {
    padding: var(--spacing-xs);
  }

  .lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
  text-align: center;
}

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

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.hidden {
  display: none;
}

.fade-in {
  animation: fadeInUp 0.6s ease-out;
}

/* ============================================
   Payment Icons Row
   ============================================ */
.payment-icons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.payment-icons img {
  width: 70px;
  height: 70px;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
  transition: transform var(--transition-base);
  border-radius: var(--radius-sm);
  background: transparent;
  padding: 0;
}

.payment-icons img:hover {
  transform: scale(1.15);
  filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.4));
}

@media (max-width: 480px) {
  .payment-icons img {
    width: 55px;
    height: 55px;
  }
}

/* Language Switcher with Flags */
.lang-btn img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}