/* ============================================================
   Register Page Styles — Glass morphism card, form, animations
   Same design language as login page (dark theme, animated orbs)
   ============================================================ */

/* ---- Page Layout ---- */

.register-page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow-y: auto;
  padding: var(--spacing-md);
  background-color: var(--color-bg-primary);
}

/* ---- Animated Background Orbs ---- */

.register-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.register-orb {
  position: absolute;
  border-radius: var(--radius-full);
  filter: blur(80px);
  opacity: 0.4;
  animation: orbFloat 12s ease-in-out infinite;
  will-change: transform;
}

.register-orb--1 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(221, 160, 221, 0.5), transparent 70%);
  top: -140px;
  right: -100px;
  animation-delay: 0s;
  animation-duration: 15s;
}

.register-orb--2 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(173, 216, 230, 0.45), transparent 70%);
  bottom: -100px;
  left: -80px;
  animation-delay: -6s;
  animation-duration: 19s;
}

.register-orb--3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 218, 185, 0.4), transparent 70%);
  top: 55%;
  left: 55%;
  transform: translate(-50%, -50%);
  animation-delay: -11s;
  animation-duration: 23s;
}

@keyframes orbFloat {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -20px) scale(1.05);
  }
  66% {
    transform: translate(-20px, 15px) scale(0.97);
  }
}

/* ---- Register Card ---- */

.register-card {
  position: relative;
  z-index: var(--z-base);
  width: 100%;
  max-width: 460px;
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-3xl) var(--spacing-2xl);
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(0, 0, 0, 0.04) inset;
  animation: cardEntrance 0.7s var(--transition-smooth) both;
}

@keyframes cardEntrance {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.97);
    filter: blur(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

/* ---- Card Logo ---- */

.register-logo-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  animation: cardEntrance 0.7s 0.1s var(--transition-smooth) both;
}

.register-logo {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  filter: drop-shadow(0 4px 12px rgba(88, 86, 214, 0.4));
}

/* ---- Card Heading ---- */

.register-heading {
  text-align: center;
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
  animation: cardEntrance 0.7s 0.15s var(--transition-smooth) both;
}

.register-subheading {
  text-align: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-normal);
  animation: cardEntrance 0.7s 0.2s var(--transition-smooth) both;
}

/* ---- Mode Toggle (Username / Email tabs) ---- */

.register-mode-toggle {
  display: flex;
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-bottom: var(--spacing-xl);
  gap: 3px;
  animation: cardEntrance 0.7s 0.22s var(--transition-smooth) both;
}

.register-mode-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.55rem var(--spacing-md);
  border-radius: calc(var(--radius-md) - 2px);
  border: none;
  background: transparent;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition:
    background var(--transition-base),
    color var(--transition-base),
    box-shadow var(--transition-base);
  white-space: nowrap;
}

.register-mode-btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity var(--transition-base);
}

.register-mode-btn:hover {
  color: var(--color-text-secondary);
  background: rgba(0, 0, 0, 0.04);
}

.register-mode-btn.is-active {
  background: var(--color-gradient);
  color: #ffffff;
  box-shadow: 0 2px 12px rgba(0, 113, 227, 0.35);
}

.register-mode-btn.is-active svg {
  opacity: 1;
}

/* ---- Form ---- */

.register-form {
  animation: cardEntrance 0.7s 0.25s var(--transition-smooth) both;
}

.register-field {
  margin-bottom: var(--spacing-md);
  position: relative;
}

.register-field--hidden {
  display: none;
}

.register-label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
}

.register-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.875rem var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-primary);
  outline: none;
  transition:
    border-color var(--transition-base),
    background-color var(--transition-base),
    box-shadow var(--transition-base);
  -webkit-appearance: none;
  appearance: none;
}

.register-input::placeholder {
  color: var(--color-text-tertiary);
  font-weight: var(--font-weight-light);
}

.register-input:hover {
  border-color: var(--color-border-hover);
  background: rgba(0, 0, 0, 0.05);
}

.register-input:focus {
  border-color: var(--color-accent-primary);
  background: rgba(0, 113, 227, 0.04);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12), 0 0 16px rgba(0, 113, 227, 0.08);
}

.register-input:-webkit-autofill,
.register-input:-webkit-autofill:hover,
.register-input:-webkit-autofill:focus {
  -webkit-box-shadow: 0 0 0 1000px rgba(250, 249, 247, 0.98) inset,
                      0 0 0 3px rgba(0, 113, 227, 0.12);
  -webkit-text-fill-color: var(--color-text-primary);
  caret-color: var(--color-text-primary);
  border-color: var(--color-accent-primary);
  transition: background-color 5000s ease-in-out 0s;
}

/* ---- Confirm Password Row (label + match indicator) ---- */

.register-confirm-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
}

.register-match-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  opacity: 0;
  transition: opacity var(--transition-base), color var(--transition-base);
}

.register-match-badge svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

.register-match-badge.is-match {
  opacity: 1;
  color: #34d27a;
}

.register-match-badge.is-mismatch {
  opacity: 1;
  color: #ff6b62;
}

/* ---- Password Strength Indicator ---- */

.register-strength {
  margin-top: 8px;
}

.register-strength-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 4px;
}

.register-strength-segment {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: rgba(0, 0, 0, 0.08);
  transition: background var(--transition-base);
}

/* Weak: first segment only → red */
.register-strength[data-level="weak"] .register-strength-segment:nth-child(1) {
  background: #ff6b62;
}

/* Medium: first two segments → amber */
.register-strength[data-level="medium"] .register-strength-segment:nth-child(1),
.register-strength[data-level="medium"] .register-strength-segment:nth-child(2) {
  background: #f5a623;
}

/* Strong: all three segments → green */
.register-strength[data-level="strong"] .register-strength-segment:nth-child(1),
.register-strength[data-level="strong"] .register-strength-segment:nth-child(2),
.register-strength[data-level="strong"] .register-strength-segment:nth-child(3) {
  background: #34d27a;
}

.register-strength-label {
  font-size: 11px;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  transition: color var(--transition-base);
}

.register-strength[data-level="weak"]   .register-strength-label { color: #ff6b62; }
.register-strength[data-level="medium"] .register-strength-label { color: #f5a623; }
.register-strength[data-level="strong"] .register-strength-label { color: #34d27a; }

/* ---- Error Message ---- */

.register-error {
  display: none;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(255, 59, 48, 0.1);
  border: 1px solid rgba(255, 59, 48, 0.25);
  border-radius: var(--radius-md);
  padding: 0.75rem var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: #ff6b62;
  line-height: var(--line-height-normal);
}

.register-error.is-visible {
  display: flex;
}

/* ---- Success Message ---- */

.register-success {
  display: none;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(52, 210, 122, 0.1);
  border: 1px solid rgba(52, 210, 122, 0.25);
  border-radius: var(--radius-md);
  padding: 0.75rem var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: #34d27a;
  line-height: var(--line-height-normal);
}

.register-success.is-visible {
  display: flex;
}

.register-error__icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: #ff6b62;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.register-success__icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: #34d27a;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---- Submit Button ---- */

.register-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  background: var(--color-gradient);
  color: #ffffff;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.01em;
  padding: 0.9375rem var(--spacing-xl);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  margin-top: var(--spacing-lg);
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    opacity var(--transition-base),
    filter var(--transition-base);
  box-shadow: 0 4px 20px rgba(0, 113, 227, 0.35);
  position: relative;
  overflow: hidden;
}

.register-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.12), transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.register-btn:hover:not(:disabled)::before {
  opacity: 1;
}

.register-btn:hover:not(:disabled) {
  transform: scale(1.025) translateY(-1px);
  box-shadow: 0 8px 28px rgba(0, 113, 227, 0.5);
  filter: brightness(1.08);
}

.register-btn:active:not(:disabled) {
  transform: scale(0.98) translateY(0);
  box-shadow: 0 2px 12px rgba(0, 113, 227, 0.3);
  transition-duration: 100ms;
}

.register-btn:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  transform: none;
  filter: none;
}

.register-btn.is-loading {
  pointer-events: none;
}

/* ---- Button Spinner ---- */

.register-btn .btn-spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #ffffff;
  border-radius: var(--radius-full);
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

.register-btn.is-loading .btn-spinner {
  display: block;
}

.register-btn.is-loading .btn-label {
  opacity: 0.75;
}

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

/* ---- Footer Links ---- */

.register-footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  animation: cardEntrance 0.7s 0.35s var(--transition-smooth) both;
}

.register-signin-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.register-signin-link a {
  color: var(--color-accent-primary);
  font-weight: var(--font-weight-medium);
  opacity: 0.9;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.register-signin-link a:hover {
  opacity: 1;
  color: #3a9fff;
}

.register-back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-tertiary);
  transition: color var(--transition-base), gap var(--transition-base);
}

.register-back-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.register-back-link:hover {
  color: var(--color-text-secondary);
  gap: calc(var(--spacing-xs) + 2px);
}

.register-back-link:hover svg {
  transform: translateX(-3px);
}

/* ---- Responsive ---- */

/* Small Mobile (320px - 479px) */
@media (max-width: 479px) {
  .register-page {
    padding: var(--spacing-sm);
    align-items: flex-start;
    padding-top: var(--spacing-xl);
  }

  .register-card {
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-lg);
  }

  .register-logo {
    width: 44px;
    height: 44px;
  }

  .register-heading {
    font-size: var(--font-size-xl);
  }

  .register-subheading {
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-md);
  }

  .register-form {
    gap: var(--spacing-md);
  }

  .register-input {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  .register-label {
    font-size: var(--font-size-sm);
  }

  .register-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  .register-mode-toggle {
    padding: var(--spacing-xs);
  }

  .register-mode-btn {
    font-size: 11px;
    padding: 0.4rem var(--spacing-xs);
  }

  .register-orb--1 {
    width: 200px;
    height: 200px;
    top: -60px;
    left: -50px;
  }

  .register-orb--2 {
    width: 180px;
    height: 180px;
    bottom: -40px;
    right: -40px;
  }

  .register-orb--3 {
    display: none;
  }

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

  .register-lang-dropdown {
    min-width: 120px;
  }

  .register-lang-option {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
  }

  .register-footer {
    margin-top: var(--spacing-lg);
  }

  .register-signin-link {
    font-size: var(--font-size-xs);
  }

  .register-back-link {
    font-size: var(--font-size-xs);
  }

  .register-divider {
    margin: var(--spacing-lg) 0 var(--spacing-sm);
  }

  .register-error {
    padding: var(--spacing-sm);
    font-size: var(--font-size-xs);
  }
}

/* Mobile (480px - 767px) */
@media (min-width: 480px) and (max-width: 767px) {
  .register-page {
    padding: var(--spacing-md);
  }

  .register-card {
    padding: var(--spacing-2xl) var(--spacing-lg);
    border-radius: var(--radius-xl);
  }

  .register-heading {
    font-size: var(--font-size-2xl);
  }

  .register-orb--1 {
    width: 300px;
    height: 300px;
  }

  .register-orb--2 {
    width: 250px;
    height: 250px;
  }

  .register-orb--3 {
    display: none;
  }

  .register-mode-btn {
    font-size: 12px;
    padding: 0.5rem var(--spacing-sm);
  }
}

/* Tablet (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
  .register-card {
    max-width: 480px;
    padding: var(--spacing-3xl) var(--spacing-2xl);
  }

  .register-heading {
    font-size: var(--font-size-3xl);
  }

  .register-orb--1 {
    width: 400px;
    height: 400px;
  }

  .register-orb--2 {
    width: 350px;
    height: 350px;
  }

  .register-orb--3 {
    width: 250px;
    height: 250px;
  }
}

/* Desktop (1024px - 1439px) */
@media (min-width: 1024px) and (max-width: 1439px) {
  .register-card {
    max-width: 480px;
  }

  .register-orb--1 {
    width: 450px;
    height: 450px;
  }

  .register-orb--2 {
    width: 380px;
    height: 380px;
  }

  .register-orb--3 {
    width: 280px;
    height: 280px;
  }
}

/* Large Desktop (1440px+) */
@media (min-width: 1440px) {
  .register-card {
    max-width: 520px;
    padding: var(--spacing-4xl) var(--spacing-3xl);
  }

  .register-heading {
    font-size: var(--font-size-4xl);
  }

  .register-subheading {
    font-size: var(--font-size-base);
  }

  .register-orb--1 {
    width: 600px;
    height: 600px;
  }

  .register-orb--2 {
    width: 500px;
    height: 500px;
  }

  .register-orb--3 {
    width: 400px;
    height: 400px;
  }
}

/* Extra Large Desktop (1920px+) */
@media (min-width: 1920px) {
  .register-card {
    max-width: 560px;
  }

  .register-page {
    padding: var(--spacing-2xl);
  }
}

/* Landscape orientation for mobile/tablet */
@media (max-width: 1023px) and (orientation: landscape) {
  .register-page {
    align-items: center;
    padding: var(--spacing-md);
  }

  .register-card {
    margin-top: 0;
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .register-orb--3 {
    display: none;
  }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .register-logo {
    image-rendering: -webkit-optimize-contrast;
  }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .register-orb {
    animation: none;
  }

  .register-card {
    animation: none;
  }

  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 360px) {
  .register-card {
    padding: var(--spacing-xl) var(--spacing-md);
  }
}

/* ---- Language Switcher ---- */

.register-lang {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
}

.register-lang-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
}

.register-lang-btn:hover {
  background: rgba(255, 255, 255, 1);
  border-color: var(--color-text-tertiary);
}

.register-lang-flag {
  font-size: 16px;
  line-height: 1;
}

.register-lang-arrow {
  font-size: 10px;
  transition: transform var(--transition-base);
}

.register-lang-btn[aria-expanded="true"] .register-lang-arrow {
  transform: rotate(180deg);
}

.register-lang-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 140px;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-base);
  z-index: 1000;
}

.register-lang-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.register-lang-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition-base);
  text-align: left;
}

.register-lang-option:hover {
  background: rgba(0, 0, 0, 0.04);
}

.register-lang-option:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.register-lang-option:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.register-lang-option.is-active {
  background: rgba(0, 113, 227, 0.08);
  color: var(--color-accent-primary);
  font-weight: var(--font-weight-medium);
}

.register-lang-option-flag {
  font-size: 14px;
  line-height: 1;
}