:root {
  --black: #0a0a0a;
  --near-black: #121212;
  --white: #ffffff;
  --off-white: #f5f5f5;
  --gray-100: #e6e6e6;
  --gray-300: #b3b3b3;
  --gray-500: #7a7a7a;
  --gray-700: #3d3d3d;
  --danger: #e2e2e2;
  --radius: 16px;
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--black);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow-x: hidden;
}

.backdrop {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.05), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.04), transparent 45%),
    var(--black);
  z-index: -1;
}

.login-shell {
  width: 100%;
  max-width: 420px;
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0;
  animation: fadeSlideDown 600ms ease forwards;
}

.brand-mark {
  display: block;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--gray-700);
  background: var(--black);
  object-fit: contain;
  padding: 4px;
}

.brand-name {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gray-300);
  text-transform: uppercase;
}

.brand-version {
  color: var(--gray-500);
}

.login-card {
  width: 100%;
  background: var(--off-white);
  color: var(--black);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.6);
  opacity: 0;
  transform: translateY(16px) scale(0.97);
  animation: cardEnter 620ms cubic-bezier(0.16, 1, 0.3, 1) 120ms forwards;
}

.login-card.shake {
  animation: shake 420ms ease;
}

@keyframes cardEnter {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

.login-title {
  margin: 0 0 4px;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.login-subtitle {
  margin: 0 0 28px;
  font-size: 14px;
  color: var(--gray-500);
}

.field {
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-row {
  display: flex;
  gap: 12px;
}

.field-port {
  max-width: 110px;
}

label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--gray-700);
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="number"] {
  border: none;
  border-bottom: 1.5px solid var(--gray-100);
  background: transparent;
  padding: 10px 2px;
  font-size: 15px;
  color: var(--black);
  outline: none;
  transition: border-color var(--transition), transform var(--transition);
  font-family: inherit;
}

input::placeholder {
  color: var(--gray-300);
}

input:focus {
  border-color: var(--black);
  transform: translateY(-1px);
}

.password-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.password-wrap input {
  flex: 1;
  padding-right: 32px;
}

.toggle-visibility {
  position: absolute;
  right: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-500);
  display: flex;
  align-items: center;
  padding: 4px;
  transition: color var(--transition);
}

.toggle-visibility:hover {
  color: var(--black);
}

.icon {
  width: 18px;
  height: 18px;
}

.advanced-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-700);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 0;
  margin-bottom: 6px;
}

.chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}

.advanced-toggle[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.advanced-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}

.advanced-panel.open {
  max-height: 220px;
}

.advanced-panel-inner {
  padding-top: 6px;
  padding-bottom: 6px;
}

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-700);
  text-transform: none;
  cursor: pointer;
}

.checkbox-field input {
  width: 15px;
  height: 15px;
  accent-color: var(--black);
}

.remember-field {
  margin-top: 4px;
  margin-bottom: 2px;
}

.remember-hint {
  margin: 0 0 4px 23px;
  font-size: 11.5px;
  color: var(--gray-300);
}

/* Saved accounts */
.saved-accounts {
  margin-bottom: 22px;
}

.saved-accounts-label {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.saved-accounts-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 10px;
}

.saved-account-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--gray-100);
  border-radius: 10px;
  background: var(--white);
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.saved-account-row:hover {
  border-color: var(--black);
  background: var(--off-white);
}

.saved-account-row:active {
  transform: scale(0.99);
}

.saved-account-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--black);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.saved-account-email {
  flex: 1;
  font-size: 13.5px;
  color: var(--black);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.saved-account-remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  color: var(--gray-500);
  font-size: 15px;
  line-height: 1;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}

.saved-account-remove:hover {
  background: var(--gray-100);
  color: var(--black);
}

.use-other-account {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-700);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 0;
}

.use-other-account:hover {
  color: var(--black);
}

.saved-account-badge {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gray-500);
  border: 1px solid var(--gray-100);
  border-radius: 6px;
  padding: 3px 6px;
  white-space: nowrap;
}

.saved-account-row.is-tempmail .saved-account-avatar {
  background: var(--white);
  color: var(--black);
  border: 1.5px solid var(--black);
}

/* Divider */
.divider {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gray-300);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 4px 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gray-100);
}

/* Temp mail */
.tempmail-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tempmail-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--black);
  border-radius: 10px;
  background: var(--white);
  color: var(--black);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.tempmail-btn:hover {
  background: var(--black);
  color: var(--white);
}

.tempmail-btn:active {
  transform: scale(0.98);
}

.tempmail-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  background: var(--white);
  color: var(--black);
}

.tempmail-hint {
  margin: 2px 0 0;
  font-size: 11.5px;
  color: var(--gray-300);
  text-align: center;
}

.tempmail-result {
  margin-top: 14px;
  padding: 16px;
  border: 1px solid var(--gray-100);
  border-radius: 12px;
  background: var(--off-white);
  animation: cardEnter 320ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.tempmail-address-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tempmail-address {
  flex: 1;
  font-size: 14px;
  font-weight: 700;
  color: var(--black);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tempmail-copy {
  flex-shrink: 0;
  border: 1px solid var(--gray-100);
  background: var(--white);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--gray-700);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}

.tempmail-copy:hover {
  border-color: var(--black);
  color: var(--black);
}

.tempmail-copy.copied {
  border-color: var(--black);
  color: var(--black);
}

.tempmail-expiry {
  margin: 8px 0 2px;
  font-size: 12px;
  color: var(--gray-500);
}

.tempmail-continue {
  margin-top: 10px;
}

.submit-btn {
  position: relative;
  width: 100%;
  margin-top: 12px;
  padding: 13px 16px;
  border: none;
  border-radius: 10px;
  background: var(--black);
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.submit-btn:hover {
  transform: translateY(-1px);
  background: var(--gray-700);
}

.submit-btn:active {
  transform: translateY(0) scale(0.98);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.spinner {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: var(--white);
  animation: spin 700ms linear infinite;
}

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

.message {
  margin: 14px 0 0;
  font-size: 13px;
  text-align: center;
  min-height: 16px;
  color: var(--gray-700);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--transition), transform var(--transition);
}

.message.visible {
  opacity: 1;
  transform: translateY(0);
}

.message.error {
  color: #b00020;
}

.message.success {
  color: #0a7a3d;
}

@media (max-width: 480px) {
  .login-card {
    padding: 28px 22px;
  }
}