:root {
  --color-canvas: #F7F5F1;
  --color-surface: #FFFEFC;
  --color-surface-subtle: #EFECE6;
  --color-ink: #252422;
  --color-muted: #68635E;
  --color-accent: #883E4A;
  --color-accent-pressed: #6F303B;
  --color-accent-soft: #F1E4E6;
  --color-on-accent: #FFFFFF;
  --color-divider: #DED9D2;
  --color-control-border: #938B83;
  --color-success: #34634B;
  --color-success-soft: #E7F0E9;
  --color-danger: #AA303C;
  --color-danger-soft: #F8E9EB;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;

  --radius-sm: 8px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  color: var(--color-ink);
  background-color: var(--color-canvas);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.login-container {
  width: 100%;
  max-width: 400px;
}

.login-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: 36px 28px 32px;
  box-shadow: 0 10px 30px rgba(37, 36, 34, 0.04);
}

@media (max-width: 480px) {
  .login-card {
    padding: 28px 20px 24px;
  }
}

.brand-header {
  text-align: center;
  margin-bottom: 28px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--color-divider);
}

.login-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: 1px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 6px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.field-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.optional-hint {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-muted);
}

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

.gallery-input {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  background: var(--color-canvas);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
  font-size: 16px;
  color: var(--color-ink);
  font-family: var(--font-sans);
  transition: border-color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease;
}

.gallery-input.has-suffix {
  padding-right: 46px;
}

.gallery-input::placeholder {
  color: #9c958d;
  font-size: 14px;
}

.gallery-input:hover {
  border-color: var(--color-control-border);
}

.gallery-input:focus {
  outline: none;
  background: var(--color-surface);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.gallery-input.input-error {
  border-color: var(--color-danger);
  background: var(--color-danger-soft);
}

.input-suffix-btn {
  position: absolute;
  right: 1px;
  background: transparent;
  border: none;
  color: var(--color-muted);
  width: 44px;
  height: 44px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.input-suffix-btn:hover {
  color: var(--color-ink);
  background: var(--color-surface-subtle);
}

.form-feedback {
  display: none;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  background: var(--color-danger-soft);
  color: var(--color-danger);
  border: 1px solid rgba(170, 48, 60, 0.2);
}

.form-feedback.show {
  display: block;
}

.btn-submit {
  background: var(--color-accent);
  color: var(--color-on-accent);
  border: none;
  border-radius: var(--radius-sm);
  height: 48px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
  width: 100%;
  margin-top: 6px;
}

.btn-submit:hover {
  background: var(--color-accent-pressed);
}

.btn-submit:active {
  transform: scale(0.99);
}

body { min-height: 100svh; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
.btn-submit:disabled { opacity: .65; cursor: wait; }
.form-feedback:not(.is-error) { background: var(--color-success-soft); color: var(--color-success); border-color: var(--color-success); }
.input-suffix-btn .eye-slash { display: none; }
.input-suffix-btn[aria-pressed="true"] .eye-slash { display: inline; }
.login-footer { margin-top: 20px; text-align: center; color: var(--color-muted); font-size: 11px; }
.login-footer a { color: inherit; text-decoration: none; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; } }