:root {
  color-scheme: light;
  --page: #f6f8fb;
  --panel: rgba(255, 255, 255, 0.62);
  --panel-solid: #ffffff;
  --text: #4d3a44;
  --muted: #96808b;
  --line: rgba(15, 23, 42, 0.18);
  --line-strong: rgba(15, 23, 42, 0.32);
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-soft: rgba(59, 130, 246, 0.12);
  --accent-shell: #3b82f6;
  --accent-shell-hover: #2563eb;
  --accent-ink: #ffffff;
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.08);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  content: "";
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
}

button,
input {
  font: inherit;
  letter-spacing: 0;
}

.login-shell {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 100dvh;
  place-items: center;
  padding: 32px 20px;
}

.login-panel {
  width: min(100%, 410px);
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  background: var(--panel);
  box-shadow:
    0 24px 70px rgba(15, 23, 42, 0.12),
    inset 0 0 0 1px var(--line);
  backdrop-filter: blur(22px) saturate(118%);
  -webkit-backdrop-filter: blur(22px) saturate(118%);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 36px;
  color: #5c4a44;
  font-size: 14px;
  font-weight: 650;
}

.login-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(220, 38, 38, 0.18);
  border-radius: 7px;
  background: rgba(59, 130, 246, 0.16);
  color: var(--accent);
}

.login-mark svg {
  width: 19px;
  height: 19px;
}

.login-heading {
  margin: 36px 0 28px;
}

.access-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 650;
}

.access-label svg {
  width: 14px;
  height: 14px;
}

.login-heading h1 {
  margin: 12px 0 8px;
  font-size: 25px;
  font-weight: 700;
  line-height: 1.24;
}

.login-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

#login-form {
  display: grid;
  gap: 10px;
}

#login-form > label {
  color: #5c4a44;
  font-size: 13px;
  font-weight: 620;
}

.auth-switch {
  display: flex;
  gap: 6px;
  margin-bottom: 22px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.4);
}

.auth-switch button {
  flex: 1;
  min-height: 38px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
}

.auth-switch button[aria-pressed="true"] {
  background: var(--panel-solid);
  color: var(--accent);
  font-weight: 650;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
}

.auth-switch button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.auth-switch button:disabled {
  cursor: wait;
}

.confirm-password-field {
  display: grid;
  gap: 10px;
}

.confirm-password-field label {
  color: #5c4a44;
  font-size: 13px;
  font-weight: 620;
}

.register-help {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.password-control {
  position: relative;
}

.password-control input {
  width: 100%;
  height: 46px;
  padding: 0 46px 0 13px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  outline: none;
  background: rgba(255, 255, 255, 0.68);
  color: var(--text);
  transition: border-color 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.password-control input:hover:not(:disabled) {
  border-color: rgba(59, 130, 246, 0.5);
}

.password-control input:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.password-control input:disabled {
  cursor: wait;
  opacity: 0.65;
}

.username-control input {
  padding-right: 13px;
}

.visibility-button {
  position: absolute;
  top: 5px;
  right: 5px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.visibility-button:hover:not(:disabled) {
  background: var(--accent-soft);
  color: var(--accent);
}

.visibility-button:focus-visible,
.login-submit:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.visibility-button svg {
  width: 18px;
  height: 18px;
}

.eye-closed,
.password-visible .eye-open {
  display: none;
}

.password-visible .eye-closed {
  display: block;
}

.login-message {
  display: none;
  min-height: 38px;
  margin: 2px 0 0;
  padding: 9px 10px;
  border: 1px solid rgba(220, 38, 38, 0.18);
  border-radius: 6px;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 12px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.login-message.visible {
  display: block;
}

.login-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 44px;
  margin-top: 6px;
  padding: 0 16px;
  border: 1px solid rgba(0, 80, 160, 0.22);
  border-radius: 980px;
  background: var(--accent-shell);
  color: var(--accent-ink);
  font-weight: 650;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35);
  transition: background 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.login-submit:hover:not(:disabled) {
  background: var(--accent-shell-hover);
  box-shadow: 0 10px 24px rgba(59, 130, 246, 0.42);
}

.login-submit:active:not(:disabled) {
  transform: translateY(1px);
}

.login-submit:disabled {
  cursor: wait;
  opacity: 0.62;
  box-shadow: none;
}

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

.login-foot {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.foot-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.16);
}

@media (max-width: 520px) {
  .login-shell {
    align-items: center;
    padding: 18px 14px;
  }

  .login-panel {
    padding: 22px;
  }

  .login-heading {
    margin: 30px 0 24px;
  }

  .login-heading h1 {
    font-size: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}