/*
========================================
Auth System Styles
Modern PWA-Ready Design
========================================

Color Scheme:
- Primary White: #FAFBFC (60%)
- Soft Blue: #4A90E2 (30%)
- Dark Gray: #2C3E50 (10%)

Fonts:
- Persian: IRANYekan
- English: Roboto
*/

/* ========================================
   Import Global Variables & Fonts
======================================== */
@import url('variables.css');

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family:
    'Roboto',
    'IRANYekan',
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  background: var(--color-white);
  color: var(--color-gray);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  position: relative;
  overflow-x: hidden;
}

/* Background Pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(
      circle at 20% 30%,
      rgba(74, 144, 226, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 70%,
      rgba(74, 144, 226, 0.06) 0%,
      transparent 50%
    ),
    var(--gradient-overlay);
  z-index: -1;
  pointer-events: none;
}

/* RTL Support */
/* [dir='rtl'] body {
  font-family:
    'IRANYekan',
    'Roboto',
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
} */

/* ========================================
   base Container
======================================== */
.base-container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   base Card
======================================== */
.base-card {
  background: var(--color-white-pure);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-2xl);
  position: relative;
  overflow: hidden;
}

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

/* ========================================
   base Header
======================================== */
.base-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.base-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 120px;
  height: 120px;
  margin-bottom: var(--spacing-md);
}

.base-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.base-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-gray);
  margin-bottom: var(--spacing-sm);
}

.base-subtitle {
  font-size: 0.95rem;
  color: var(--color-gray-lighter);
}

/* ========================================
   Tabs (Method Selection)
======================================== */
.base-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  background: var(--color-gray-lightest);
  padding: var(--spacing-xs);
  border-radius: var(--radius-md);
}

.base-tab {
  flex: 1;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-gray-light);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.base-tab:hover {
  background: var(--color-white-pure);
  color: var(--color-blue);
}

.base-tab.active {
  background: var(--color-white-pure);
  color: var(--color-blue);
  box-shadow: var(--shadow-sm);
}

.base-tab-icon {
  font-size: 1.2rem;
}

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

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-gray);
}

.form-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-gray);
  background: var(--color-white);
  border: 2px solid var(--color-gray-lightest);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-blue);
  background: var(--color-white-pure);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-input::placeholder {
  color: var(--color-gray-lighter);
}

.form-input.error {
  border-color: var(--color-error);
}

.form-input.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* OTP Input */
.otp-input {
  text-align: center;
  letter-spacing: 1rem;
  font-size: 2rem;
  font-weight: 700;
}

[dir='rtl'] .otp-input {
  direction: ltr;
  text-align: center;
}

/* ========================================
   Buttons
======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  outline: none;
}

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

/* Primary Button */
.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white-pure);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
  background: var(--color-gray-lightest);
  color: var(--color-gray);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-light);
  color: var(--color-white-pure);
}

/* Link Button */
.btn-link {
  background: transparent;
  color: var(--color-blue);
  padding: var(--spacing-sm) var(--spacing-md);
}

.btn-link:hover:not(:disabled) {
  color: var(--color-blue-dark);
  text-decoration: underline;
}

/* Full Width */
.btn-full {
  width: 100%;
}

/* Large Button */
.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: 1.1rem;
}

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

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border-left: 4px solid var(--color-success);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border-left: 4px solid var(--color-error);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
  border-left: 4px solid var(--color-warning);
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-info);
  border-left: 4px solid var(--color-info);
}

[dir='rtl'] .alert {
  border-left: none;
  border-right: 4px solid;
}

/* ========================================
   Timer & Progress
======================================== */
.timer-container {
  text-align: center;
  margin: var(--spacing-lg) 0;
}

.timer {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-blue);
}

.timer-icon {
  font-size: 1.4rem;
}

.timer.expired {
  color: var(--color-error);
}

/* Progress Bar */
.progress-bar {
  height: 4px;
  background: var(--color-gray-lightest);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: var(--spacing-md) 0;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  transition: width var(--transition-slow);
}

/* ========================================
   Back Link
======================================== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-gray-lighter);
  text-decoration: none;
  font-size: 0.9rem;
  margin-top: var(--spacing-lg);
  transition: color var(--transition-base);
}

.back-link:hover {
  color: var(--color-blue);
}

[dir='rtl'] .back-link {
  flex-direction: row-reverse;
}

/* ========================================
   Divider
======================================== */
.divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
  color: var(--color-gray-lighter);
  font-size: 0.9rem;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-gray-lightest);
}

/* ========================================
   Loading Spinner
======================================== */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.btn .spinner {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 640px) {
  body {
    padding: var(--spacing-sm);
  }

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

  .base-title {
    font-size: 1.5rem;
  }

  .base-tabs {
    flex-direction: column;
  }

  .otp-input {
    font-size: 1.5rem;
    letter-spacing: 0.5rem;
  }
}

/* ========================================
   Dark Mode Support (Future)
======================================== */
@media (prefers-color-scheme: dark) {
  /* Will be implemented when needed */
}

/* ========================================
   Print Styles
======================================== */
@media print {
  body::before {
    display: none;
  }

  .base-card {
    box-shadow: none;
    border: 1px solid var(--color-gray-lightest);
  }
}

/* ========================================
   Accessibility
======================================== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}