/* ── 登录/注册页 ─────────────────────────────────────────── */
html, body { overflow: auto; }

.auth-bg {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(139, 105, 64, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(91, 61, 32, 0.10) 0%, transparent 60%),
    var(--parchment);
}

/* 羊皮纸纹理模拟 */
.auth-bg::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 28px,
      rgba(139, 105, 64, 0.06) 28px,
      rgba(139, 105, 64, 0.06) 29px
    );
  pointer-events: none;
  z-index: 0;
}

.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  background: var(--parchment);
  border: 1.5px solid var(--ink-faint);
  border-radius: var(--radius-lg);
  padding: 40px 36px 32px;
  box-shadow:
    4px 4px 0 var(--ink-faint),
    8px 8px 16px var(--shadow-warm);
  text-align: center;
}

/* 内边框装饰 */
.auth-card::before {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px solid var(--ink-faint);
  border-radius: calc(var(--radius-lg) - 2px);
  pointer-events: none;
  opacity: 0.5;
}

.auth-logo {
  margin-bottom: 16px;
}

.auth-avatar {
  width: 80px;
  height: 80px;
  margin: 0 auto;
  border-radius: 50%;
  border: 2px solid var(--ink-faint);
  background: var(--parchment-dark);
  padding: 8px;
}

.auth-title {
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--ink-dark);
  letter-spacing: 3px;
  margin-bottom: 4px;
}

.auth-subtitle {
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 4px;
  margin-bottom: 28px;
}

/* 错误/成功提示 */
.auth-error,
.auth-success {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
  text-align: left;
}

.auth-error {
  background: rgba(139, 58, 26, 0.08);
  border: 1px solid rgba(139, 58, 26, 0.3);
  color: var(--accent);
}

.auth-success {
  background: rgba(64, 100, 48, 0.08);
  border: 1px solid rgba(64, 100, 48, 0.3);
  color: #3A6430;
}

/* 表单 */
.auth-form {
  text-align: left;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 2px;
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 11px 14px;
  background: var(--parchment-dark);
  border: 1px solid var(--ink-faint);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink-dark);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  border-color: var(--ink-light);
  box-shadow: 0 0 0 3px rgba(139, 105, 64, 0.15);
}

.form-group input::placeholder {
  color: var(--ink-faint);
}

.form-hint {
  display: block;
  font-size: 11px;
  color: var(--ink-faint);
  margin-top: 4px;
  letter-spacing: 1px;
}

.auth-form .btn-primary {
  width: 100%;
  text-align: center;
  padding: 13px;
  font-size: 15px;
  letter-spacing: 4px;
}

/* 底部链接 */
.auth-footer {
  font-size: 13px;
  color: var(--ink-light);
  margin-bottom: 20px;
}

.auth-link {
  color: var(--accent);
  font-weight: bold;
}

/* 装饰引言 */
.auth-deco-text {
  font-size: 11px;
  color: var(--ink-faint);
  line-height: 1.8;
  font-style: italic;
  border-top: 1px solid var(--parchment-deep);
  padding-top: 16px;
  letter-spacing: 0.5px;
}

/* 按钮加载状态 */
.btn-primary.loading .btn-text::after {
  content: '……';
  animation: dots 1s infinite;
}

@keyframes dots {
  0%, 100% { content: '……'; }
  33% { content: '·'; }
  66% { content: '··'; }
}

/* ── 响应式 ────────────────────────────────────────────── */
@media (max-width: 480px) {
  .auth-card {
    padding: 28px 20px 24px;
  }
  .auth-title { font-size: 22px; }
}