/* ============================================================
   auth.css · 登录/注册遮罩样式
   复用青禾映画编辑式有机风设计系统
   ============================================================ */

/* ---------- 遮罩层 ---------- */
.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(245, 241, 232, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 1;
  transition: opacity 0.3s ease;
}

.auth-overlay[hidden] {
  display: none;
}

.auth-overlay.is-hiding {
  opacity: 0;
  pointer-events: none;
}

/* ---------- 卡片 ---------- */
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 40px 36px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* 顶部装饰线 */
.auth-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-brand), var(--color-accent), var(--color-brand));
}

/* ---------- 品牌图标 ---------- */
.auth-card__brand {
  margin-bottom: 16px;
}

.auth-card__brand svg {
  width: 48px;
  height: 48px;
  color: var(--color-brand);
  opacity: 0.85;
}

/* ---------- 标题 ---------- */
.auth-card__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}

.auth-card__subtitle {
  font-size: 0.875rem;
  color: var(--color-ink-soft);
  margin-bottom: 28px;
}

/* ---------- 表单 ---------- */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.auth-form[hidden] {
  display: none;
}

/* 输入组 */
.auth-field {
  position: relative;
  text-align: left;
}

.auth-field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  margin-bottom: 6px;
}

.auth-field input {
  width: 100%;
  padding: 10px 0;
  border: none;
  border-bottom: 1.5px solid var(--color-border-strong);
  background: transparent;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-ink);
  outline: none;
  transition: border-color 0.2s ease;
}

.auth-field input::placeholder {
  color: var(--color-ink-faint);
}

.auth-field input:focus {
  border-bottom-color: var(--color-brand);
}

/* ---------- 按钮 ---------- */
.auth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px 24px;
  margin-top: 8px;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

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

.auth-btn--primary {
  background: var(--color-brand);
  color: #fff;
}

.auth-btn--primary:hover {
  background: var(--color-brand-deep);
}

.auth-btn--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---------- 错误提示 ---------- */
.auth-error {
  font-size: 0.825rem;
  color: var(--color-warn);
  min-height: 1.2em;
  text-align: left;
  margin-top: -8px;
}

.auth-error:empty {
  display: none;
}

/* ---------- 切换链接 ---------- */
.auth-toggle {
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}

.auth-toggle a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
}

.auth-toggle a:hover {
  text-decoration: underline;
}

/* ---------- 提示信息 ---------- */
.auth-hint {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-ink-faint);
  line-height: 1.5;
}

.auth-hint code {
  font-family: var(--font-mono);
  background: var(--color-bg);
  padding: 1px 5px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

/* ---------- 导航栏登出按钮 ---------- */
.nav__logout {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-left: 12px;
}

.nav__logout:hover {
  background: var(--color-warn);
  border-color: var(--color-warn);
  color: #fff;
}

.nav__logout[hidden] {
  display: none;
}

/* ---------- 加载旋转 ---------- */
.auth-btn--loading {
  position: relative;
  color: transparent !important;
}

.auth-btn--loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: auth-spin 0.6s linear infinite;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 480px) {
  .auth-card {
    padding: 32px 24px 28px;
  }

  .auth-card__title {
    font-size: 1.3rem;
  }
}