/* Login Page — Liquid Glass Authentication Experience */
.login-page {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  min-height: 100dvh;
  box-sizing: border-box;
  overflow-y: auto;
  opacity: 1;
  transition: opacity 0.35s var(--ease), visibility 0.35s;
}

.login-page[hidden] {
  display: none !important;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.login-page__topbar {
  position: absolute;
  top: 20px;
  left: 24px;
  right: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: auto;
}

.login-page__brand-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 8px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
  background: var(--glass-chrome);
  backdrop-filter: blur(var(--blur)) saturate(var(--sat));
  -webkit-backdrop-filter: blur(var(--blur)) saturate(var(--sat));
  box-shadow: var(--shadow);
  border: 1px solid var(--sheen);
}

.login-page__theme-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-chrome);
  backdrop-filter: blur(var(--blur)) saturate(var(--sat));
  -webkit-backdrop-filter: blur(var(--blur)) saturate(var(--sat));
  border: 1px solid var(--sheen);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.2s var(--spring), background 0.2s;
}

.login-page__theme-btn:hover {
  transform: scale(1.06);
  background: var(--fill-hover);
}

.login-page__theme-btn:active {
  transform: scale(0.95);
}

.login-card {
  width: 100%;
  max-width: 430px;
  margin: auto;
  padding: 38px 34px 34px;
  box-sizing: border-box;
  border-radius: 28px;
  background: var(--glass-thick);
  backdrop-filter: blur(var(--blur-thick)) saturate(var(--sat)) brightness(var(--bright));
  -webkit-backdrop-filter: blur(var(--blur-thick)) saturate(var(--sat)) brightness(var(--bright));
  box-shadow: var(--depth), 0 24px 64px -16px rgba(0, 0, 0, 0.4), var(--shadow-lift);
  border: 1px solid var(--rim-hi);
  position: relative;
  z-index: 2;
  animation: loginCardIn 0.5s var(--ease) both;
}

@keyframes loginCardIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.login-card__header {
  text-align: center;
  margin-bottom: 24px;
}

.login-card__mark {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(47, 124, 246, 0.9), rgba(139, 92, 246, 0.9));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 10px 24px -6px rgba(47, 124, 246, 0.55), inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.login-card__mark svg {
  width: 32px;
  height: 32px;
}

.login-card__title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  margin: 0 0 6px;
  transition: opacity 0.16s ease, transform 0.2s var(--ease);
}

.login-card__subtitle {
  font-size: 14px;
  color: var(--text-2);
  margin: 0;
  line-height: 1.4;
  transition: opacity 0.16s ease, transform 0.2s var(--ease);
}

/* Native Segmented Tabs with Spring Lens Pill */
.login-tabs {
  display: flex;
  background: var(--fill);
  border-radius: 999px;
  padding: 3px;
  margin-bottom: 24px;
  position: relative;
  border: 1px solid var(--sheen);
  user-select: none;
}

.login-tabs__pill {
  position: absolute;
  top: 3px;
  left: 3px;
  width: calc(50% - 3px);
  height: calc(100% - 6px);
  border-radius: 999px;
  background: var(--lens);
  box-shadow: var(--lens-glow);
  pointer-events: none;
  z-index: 1;
  transition: transform 0.36s cubic-bezier(0.34, 1.45, 0.55, 1);
  will-change: transform;
}

.login-tabs[data-active="signUp"] .login-tabs__pill {
  transform: translateX(100%);
}

.login-tab-btn {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.24s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  position: relative;
  z-index: 2;
}

.login-tab-btn.is-active {
  color: var(--text);
}

/* Alert Notification */
.login-alert {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.35;
  margin-bottom: 18px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  animation: alertPop 0.25s var(--ease);
}

@keyframes alertPop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-alert--error {
  background: rgba(217, 45, 58, 0.12);
  border: 1px solid rgba(217, 45, 58, 0.3);
  color: #ff6b6b;
}

[data-theme="light"] .login-alert--error {
  background: rgba(217, 45, 58, 0.08);
  border: 1px solid rgba(217, 45, 58, 0.25);
  color: #d92d3a;
}

.login-alert--success {
  background: rgba(34, 165, 89, 0.12);
  border: 1px solid rgba(34, 165, 89, 0.3);
  color: #34d399;
}

[data-theme="light"] .login-alert--success {
  background: rgba(34, 165, 89, 0.08);
  border: 1px solid rgba(34, 165, 89, 0.25);
  color: #1a8f4c;
}

/* Fields & Transitions */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Native Collapsible Animations via CSS Grid Rows */
.login-field--collapsible {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transform: translateY(-8px) scale(0.98);
  transition: grid-template-rows 0.34s cubic-bezier(0.22, 1, 0.36, 1),
              opacity 0.26s ease,
              transform 0.34s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: grid-template-rows, opacity, transform;
}

.login-field--collapsible > .login-field__inner {
  overflow: hidden;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 2px;
}

.login-field--collapsible.is-open {
  grid-template-rows: 1fr;
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Collapsible password wrap for forgot mode */
.login-field--pass-wrap {
  display: grid;
  grid-template-rows: 1fr;
  opacity: 1;
  transform: translateY(0);
  transition: grid-template-rows 0.34s cubic-bezier(0.22, 1, 0.36, 1),
              opacity 0.26s ease,
              transform 0.34s cubic-bezier(0.22, 1, 0.36, 1);
}

.login-field--pass-wrap > .login-field__inner {
  overflow: hidden;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.login-field--pass-wrap.is-collapsed {
  grid-template-rows: 0fr;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
}

.login-field__label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.login-field__label-link {
  color: var(--blue);
  text-decoration: none;
  font-size: 12px;
  text-transform: none;
  letter-spacing: normal;
  cursor: pointer;
  transition: opacity 0.2s, visibility 0.2s;
}

.login-field__label-link.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.login-field__label-link:hover {
  text-decoration: underline;
  opacity: 0.85;
}

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

.login-input-icon {
  position: absolute;
  left: 13px;
  color: var(--text-3);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-input-icon svg {
  width: 17px;
  height: 17px;
}

.login-input {
  width: 100%;
  box-sizing: border-box;
  height: 44px;
  padding: 0 14px 0 38px;
  background: var(--fill);
  border: 1px solid var(--sheen);
  border-radius: 12px;
  color: var(--text);
  font-family: var(--font);
  font-size: 14.5px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  outline: none;
}

.login-input:focus {
  border-color: var(--blue);
  background: var(--fill-2);
  box-shadow: 0 0 0 3px rgba(47, 124, 246, 0.25);
}

.login-input-eye {
  position: absolute;
  right: 10px;
  background: transparent;
  border: none;
  padding: 6px;
  color: var(--text-3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: color 0.2s;
}

.login-input-eye:hover {
  color: var(--text);
}

.login-input-eye svg {
  width: 17px;
  height: 17px;
}

.login-check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-2);
  margin-top: 2px;
  cursor: pointer;
  user-select: none;
}

.login-check-row input[type="checkbox"] {
  accent-color: var(--blue);
  width: 16px;
  height: 16px;
  border-radius: 4px;
  cursor: pointer;
}

/* Submit Button */
.login-submit-btn {
  height: 46px;
  width: 100%;
  margin-top: 10px;
  border: none;
  border-radius: 14px;
  background: linear-gradient(180deg, #3b82f6, #2563eb);
  color: #fff;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.35);
  transition: transform 0.18s var(--spring), box-shadow 0.2s, opacity 0.2s;
}

.login-submit-btn:hover:not(:disabled) {
  transform: translateY(-1.5px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.55), inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.login-submit-btn:active:not(:disabled) {
  transform: translateY(0.5px);
}

.login-submit-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.login-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* Card Footer */
.login-card__footer {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--sep);
  text-align: center;
  font-size: 12.5px;
  color: var(--text-3);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.login-card__footer svg {
  width: 14px;
  height: 14px;
  color: var(--green);
}