/* ============================================
   AUTH.CSS - LOGIN & REGISTER (MOBILE OPTIMIZED)
   Ultra Modern | Blue Theme | Mobile-First
   ============================================ */

/* ===== CLEAN BACKGROUND ===== */
.auth-wrapper {
  min-height: 100vh;
  min-height: calc(var(--vh, 1vh) * 100);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: var(--color-bg-primary);
  position: relative;
  overflow-x: hidden;
}

/* ===== CENTER ALIGNMENT - RESPONSIVE ===== */
.auth-wrapper .row {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
}

.auth-wrapper .row > * {
  padding: 0;
}

/* ===== GLASSMORPHISM CARD ===== */
.card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  width: 100%;
  animation: cardEntrance 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

@keyframes cardEntrance {
  0% {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ===== GRADIENT HEADER - BLUE THEME ===== */
.gradient-bg {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 50%, #1e40af 100%);
  padding: var(--space-6) var(--space-4);
  position: relative;
  overflow: hidden;
}

.card-header h4 {
  position: relative;
  z-index: 1;
  font-weight: var(--font-bold);
  font-size: var(--text-xl);
  color: var(--color-white);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  margin-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.card-header h4 i {
  font-size: var(--text-lg);
}

/* ===== CARD BODY - MOBILE OPTIMIZED ===== */
.card-body {
  padding: var(--space-6) var(--space-4);
  background: var(--color-white);
}

/* ===== PROGRESS BAR - BLUE THEME ===== */
.form-progress {
  margin-bottom: var(--space-6);
}

.progress {
  height: 5px;
  border-radius: var(--radius-full);
  background: var(--color-primary-100);
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.progress-bar {
  background: linear-gradient(90deg, #3b82f6 0%, #2563eb 50%, #1d4ed8 100%);
  transition: width var(--transition-base);
  height: 100%;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.4);
}

.progress-text {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
  font-weight: var(--font-medium);
  text-align: center;
}

/* ===== FORM LABELS ===== */
.form-label {
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
}

.form-label i {
  color: var(--color-primary);
  font-size: var(--text-xs);
}

/* ===== FORM CONTROLS - MOBILE OPTIMIZED ===== */
.form-control {
  height: 48px;
  border: 2px solid #e5e7eb;
  border-radius: var(--radius-lg);
  padding: 0 var(--space-3);
  font-size: 16px;
  transition: all 0.2s ease;
  background: #f9fafb;
  color: var(--color-text-primary);
  font-family: inherit;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
}

.form-control:hover {
  border-color: #d1d5db;
  background: var(--color-white);
}

.form-control:focus {
  border-color: #3b82f6;
  box-shadow: 
    0 0 0 3px rgba(59, 130, 246, 0.1),
    0 2px 8px rgba(0, 0, 0, 0.08);
  background: var(--color-white);
  outline: none;
}

.form-control::placeholder {
  color: #9ca3af;
  font-size: 14px;
}

/* ===== PASSWORD FIELD WITH TOGGLE ===== */
.password-field {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  padding: var(--space-2);
  transition: var(--transition-fast);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  -webkit-tap-highlight-color: transparent;
  min-width: 40px;
  min-height: 40px;
}

.password-toggle:hover,
.password-toggle:active {
  color: var(--color-primary);
  background: var(--color-primary-50);
}

/* ===== VALIDATION STATES ===== */
.form-control.is-invalid {
  border-color: var(--color-danger);
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.invalid-feedback {
  display: flex;
  align-items: flex-start;
  gap: var(--space-1);
  color: var(--color-danger);
  font-size: var(--text-xs);
  margin-top: var(--space-2);
  font-weight: var(--font-medium);
  line-height: 1.4;
}

.invalid-feedback i {
  margin-top: 2px;
  flex-shrink: 0;
}

/* ===== EMAIL & PASSWORD VALIDATION INDICATORS ===== */
.email-validation,
.password-match-indicator {
  position: absolute;
  right: 3rem;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 9;
  font-size: var(--text-lg);
  pointer-events: none;
}

.email-validation.show,
.password-match-indicator.show {
  opacity: 1;
}

.email-validation.valid,
.password-match-indicator.match {
  color: var(--color-success);
  animation: checkPop 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes checkPop {
  0% { transform: translateY(-50%) scale(0); }
  50% { transform: translateY(-50%) scale(1.2); }
  100% { transform: translateY(-50%) scale(1); }
}

.email-validation.invalid,
.password-match-indicator.no-match {
  color: var(--color-danger);
}

/* ===== PHONE INPUT ===== */
.phone-input-group {
  position: relative;
}

.phone-prefix {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  font-weight: var(--font-semibold);
  z-index: 9;
  font-size: 16px;
  background: var(--color-white);
  padding-right: var(--space-2);
}

.form-control.has-prefix {
  padding-left: 3rem;
}

/* ===== PASSWORD STRENGTH - BLUE THEME ===== */
.password-strength {
  height: 5px;
  border-radius: var(--radius-full);
  background: var(--color-gray-200);
  overflow: hidden;
  margin-top: var(--space-2);
}

.password-strength-bar {
  height: 100%;
  width: 0;
  transition: width 0.3s ease, background-color 0.3s ease;
  border-radius: var(--radius-full);
}

.password-strength-bar.weak {
  width: 33%;
  background: linear-gradient(90deg, var(--color-danger) 0%, #f87171 100%);
}

.password-strength-bar.medium {
  width: 66%;
  background: linear-gradient(90deg, #3b82f6 0%, #60a5fa 100%);
}

.password-strength-bar.strong {
  width: 100%;
  background: linear-gradient(90deg, var(--color-success) 0%, #4ade80 100%);
}

.password-strength-text {
  font-size: var(--text-xs);
  margin-top: var(--space-1);
  font-weight: var(--font-semibold);
  text-align: right;
}

.password-strength-text.weak { color: var(--color-danger); }
.password-strength-text.medium { color: #3b82f6; }
.password-strength-text.strong { color: var(--color-success); }

/* ===== PASSWORD REQUIREMENTS ===== */
.password-requirements {
  background: var(--color-primary-50);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  margin-top: var(--space-3);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.password-requirements ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.password-requirements li {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.4;
  transition: color 0.2s ease;
}

.password-requirements li:last-child {
  margin-bottom: 0;
}

.password-requirements li::before {
  content: '✗';
  position: absolute;
  left: 0;
  color: var(--color-danger);
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
}

.password-requirements li.valid {
  color: var(--color-success);
}

.password-requirements li.valid::before {
  content: '✓';
  color: var(--color-success);
}

/* ===== CHECKBOX - TOUCH OPTIMIZED ===== */
.form-check {
  padding-left: 1.75rem;
  margin-bottom: var(--space-4);
  min-height: 24px;
}

.form-check-input {
  width: 1.125rem;
  height: 1.125rem;
  border: 2px solid var(--color-border);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 0.125rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  -webkit-appearance: none;
  appearance: none;
}

.form-check-input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M6 10l3 3l6-6'/%3e%3c/svg%3e");
}

.form-check-input:focus {
  box-shadow: 0 0 0 3px var(--color-primary-50);
  border-color: var(--color-primary);
  outline: none;
}

.form-check-label {
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  cursor: pointer;
  margin-bottom: 0;
  line-height: 1.5;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* ===== TERMS CHECKBOX ===== */
.terms-checkbox {
  background: var(--color-primary-50);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-3);
  margin-bottom: var(--space-5);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.terms-checkbox .form-check-label {
  font-size: var(--text-xs);
  line-height: 1.5;
}

/* ===== GRADIENT BUTTON - BLUE THEME ===== */
.btn-gradient {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 50%, #1d4ed8 100%);
  border: none;
  color: var(--color-white);
  font-weight: var(--font-bold);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 
    0 4px 12px rgba(59, 130, 246, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.1);
  width: 100%;
  cursor: pointer;
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  -webkit-tap-highlight-color: transparent;
  min-height: 48px;
  touch-action: manipulation;
}

.btn-gradient::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 ease;
}

.btn-gradient:active:not(:disabled) {
  transform: scale(0.98);
  box-shadow: 
    0 2px 8px rgba(59, 130, 246, 0.3),
    0 1px 2px rgba(0, 0, 0, 0.1);
}

.btn-gradient:focus {
  box-shadow: 
    0 0 0 3px rgba(59, 130, 246, 0.2),
    0 4px 12px rgba(59, 130, 246, 0.3);
  outline: none;
}

/* Loading state */
.btn-gradient:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-gradient.loading {
  color: transparent;
}

.btn-gradient.loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  top: 50%;
  left: 50%;
  margin-left: -9px;
  margin-top: -9px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--color-white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ===== LINKS - TOUCH OPTIMIZED ===== */
.card-body a {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
  text-decoration: none;
  transition: color 0.2s ease;
  position: relative;
  display: inline-block;
  -webkit-tap-highlight-color: transparent;
  padding: var(--space-1) 0;
}

.card-body a:active {
  color: var(--color-primary-dark);
}

/* ===== DIVIDER ===== */
.divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: var(--space-5) 0;
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--color-border);
}

.divider span {
  padding: 0 var(--space-3);
  font-weight: var(--font-medium);
  background: var(--color-white);
}

/* ===== FORM TEXT ===== */
.form-text {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: var(--space-1);
  margin-top: var(--space-1);
  line-height: 1.4;
}

.form-text i {
  color: var(--color-primary);
  margin-top: 2px;
  flex-shrink: 0;
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.w-100 { width: 100%; }
.d-flex { display: flex; }
.d-block { display: block; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.align-items-center { align-items: center; }
.position-relative { position: relative; }

/* ===== RESPONSIVE BREAKPOINTS ===== */

/* Small phones (320px - 374px) */
@media (max-width: 374px) {
  .auth-wrapper {
    padding: var(--space-3) var(--space-2);
  }

  .card {
    border-radius: var(--radius-xl);
  }

  .card-body {
    padding: var(--space-5) var(--space-3);
  }

  .gradient-bg {
    padding: var(--space-5) var(--space-3);
  }

  .card-header h4 {
    font-size: var(--text-lg);
    gap: var(--space-1);
  }

  .card-header h4 i {
    font-size: var(--text-base);
  }

  .btn-gradient {
    padding: var(--space-3) var(--space-4);
    font-size: 12px;
    min-height: 44px;
  }

  .form-control {
    height: 44px;
    padding: 0 var(--space-2);
  }

  .password-requirements,
  .terms-checkbox {
    padding: var(--space-2);
  }

  .password-requirements li,
  .form-check-label,
  .form-text {
    font-size: 11px;
  }
}

/* Standard phones (375px - 767px) */
@media (min-width: 375px) and (max-width: 767px) {
  .auth-wrapper {
    padding: var(--space-4) var(--space-3);
  }
}

/* Tablets (768px+) */
@media (min-width: 768px) {
  .auth-wrapper {
    padding: var(--space-8) var(--space-6);
  }

  .auth-wrapper .row {
    max-width: 540px;
  }

  .card {
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  }

  .card-body {
    padding: 3rem 2.5rem;
  }

  .gradient-bg {
    padding: 2.5rem;
    border-radius: 24px 24px 0 0;
  }

  .card-header h4 {
    font-size: 1.75rem;
  }

  .form-control {
    height: 56px;
    padding: 0 1.25rem;
    font-size: 15px;
    border-radius: 12px;
  }

  .btn-gradient {
    padding: 1rem 2rem;
    font-size: 15px;
    min-height: 56px;
    border-radius: 12px;
  }

  .btn-gradient:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 
      0 8px 20px rgba(59, 130, 246, 0.4),
      0 4px 8px rgba(0, 0, 0, 0.15);
  }

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

  .password-requirements,
  .terms-checkbox {
    padding: var(--space-4);
  }

  .form-label {
    font-size: 14px;
    margin-bottom: 0.5rem;
  }
}

/* Desktop Medium (992px+) */
@media (min-width: 992px) {
  .auth-wrapper {
    padding: var(--space-8) 10%;
  }

  .auth-wrapper .row {
    max-width: 600px;
  }

  .card {
    border-radius: 28px;
  }

  .card-body {
    padding: 3.5rem 3rem;
  }

  .gradient-bg {
    padding: 3rem;
  }
}

/* Desktop Large (1200px+) */
@media (min-width: 1200px) {
  .auth-wrapper {
    padding: var(--space-8) 15%;
  }

  .auth-wrapper .row {
    max-width: 750px;
  }

  .card {
    border-radius: 32px;
  }

  .card-body {
    padding: 4rem 3.5rem;
  }

  .gradient-bg {
    padding: 3.5rem;
  }

  .form-control {
    height: 60px;
    font-size: 16px;
  }

  .btn-gradient {
    min-height: 60px;
    font-size: 16px;
  }
}

/* Extra Large Desktop (1400px+) */
@media (min-width: 1400px) {
  .auth-wrapper {
    padding: var(--space-8) 20%;
  }

  .auth-wrapper .row {
    max-width: 1500px;
  }

  .card {
    border-radius: 36px;
  }
}

/* Landscape phones */
@media (max-height: 667px) and (orientation: landscape) {
  .auth-wrapper {
    padding: var(--space-3) var(--space-4);
  }

  .card-body {
    padding: var(--space-4) var(--space-4);
  }

  .gradient-bg {
    padding: var(--space-4) var(--space-4);
  }

  .password-requirements,
  .terms-checkbox {
    padding: var(--space-2);
  }

  .form-progress {
    margin-bottom: var(--space-3);
  }
}

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

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-md);
}

@media (prefers-contrast: high) {
  .form-control {
    border-width: 3px;
  }

  .btn-gradient {
    border: 2px solid var(--color-white);
  }

  .card {
    border: 2px solid var(--color-border-dark);
  }
}

/* ===== DARK MODE ===== */
body.dark-mode .card,
html.dark-mode .card,
[data-theme="dark"] .card {
  background: var(--color-bg-card);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-border);
}

body.dark-mode .card-body,
html.dark-mode .card-body,
[data-theme="dark"] .card-body {
  background: var(--color-bg-card);
}

body.dark-mode .form-control,
html.dark-mode .form-control,
[data-theme="dark"] .form-control {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

body.dark-mode .form-control:focus,
html.dark-mode .form-control:focus,
[data-theme="dark"] .form-control:focus {
  background: var(--color-bg-primary);
  border-color: var(--color-primary-light);
}

body.dark-mode .password-requirements,
body.dark-mode .terms-checkbox,
html.dark-mode .password-requirements,
html.dark-mode .terms-checkbox,
[data-theme="dark"] .password-requirements,
[data-theme="dark"] .terms-checkbox {
  background: rgba(37, 99, 235, 0.1);
  border-left-color: var(--color-primary-light);
}

body.dark-mode .divider span,
html.dark-mode .divider span,
[data-theme="dark"] .divider span {
  background: var(--color-bg-card);
}

/* ===== SAFE AREA INSETS (for iPhone X+) ===== */
@supports (padding: max(0px)) {
  .auth-wrapper {
    padding-left: max(var(--space-4), env(safe-area-inset-left));
    padding-right: max(var(--space-4), env(safe-area-inset-right));
    padding-bottom: max(var(--space-4), env(safe-area-inset-bottom));
  }
}

/* ===== END OF AUTH.CSS ===== */