/* ===== z-index 层级规范 ===== */
/* 100  : 导航栏 nav
   500  : 普通弹窗 .modal-overlay
   600  : 结果展示弹窗 .result-overlay
   700  : 支付弹窗 .payment-overlay
   900  : 全局登录弹窗 #authLoginOverlay
   1000 : Toast 提示
*/

/* ===== 设计令牌 ===== */
:root {
  --modal-radius: 20px;
  --modal-padding: 36px;
}

/* ===== 工具 class ===== */
.modal-hidden { display: none !important; }

/* ===== 弹窗遮罩层 ===== */
.modal-overlay {
  position: fixed; inset: 0;
  background: var(--modal-overlay-bg);
  backdrop-filter: blur(8px);
  z-index: 500;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.show { display: flex; }
/* 登录弹窗需要更高的 z-index */
.modal-overlay.z-login { z-index: 900; }

/* ===== 弹窗主体 ===== */
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--modal-radius);
  padding: var(--modal-padding);
  max-width: 440px;
  width: 100%;
  animation: modalSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  box-shadow: var(--shadow-lg);
}
.modal.modal-lg { max-width: 560px; }
.modal.modal-sm { max-width: 360px; }

/* ===== 弹窗关闭按钮 ===== */
.modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 32px; height: 32px;
  background: var(--modal-close-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 16px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.modal-close:hover { background: var(--modal-close-hover-bg); color: var(--text-primary); }

/* ===== 弹窗文本 ===== */
.modal-title { font-size: 22px; font-weight: 700; margin-bottom: 6px; color: var(--text-primary); }
.modal-subtitle { font-size: 13px; color: var(--text-secondary); margin-bottom: 28px; line-height: 1.6; }
.modal-body { margin-bottom: 24px; }
.modal-footer { display: flex; gap: 12px; justify-content: flex-end; }
.modal-hint { font-size: 13px; color: var(--warning); margin: 8px 0 16px; }
.modal-error { font-size: 12px; color: var(--error); display: none; margin-bottom: 8px; }

/* ===== 表单元素 ===== */
.modal-input {
  width: 100%; padding: 13px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 14px; font-family: inherit;
  transition: all 0.3s;
}
.modal-input + .modal-input { margin-top: 12px; }
.modal-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.modal-input::placeholder { color: var(--text-muted); }

.modal-input-row {
  display: flex; gap: 10px;
  margin-top: 12px;
}
.modal-input-row .modal-input { flex: 1; margin-top: 0; }

/* ===== 按钮 ===== */
.modal-btn {
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all 0.3s;
  border: none;
  font-family: inherit;
}
.modal-btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}
.modal-btn-primary:hover { transform: translateY(-1px); box-shadow: var(--btn-primary-shadow); }
.modal-btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  white-space: nowrap;
}
.modal-btn-secondary:hover { border-color: var(--border-hover); color: var(--text-primary); }
.modal-btn-full { width: 100%; }
input#authModalCode { height: 47px; }
button#authModalSendCode { height: 47px; }

.modal-btn-link {
  background: none; border: none;
  color: var(--accent-light);
  font-size: 12px; font-weight: 500;
  cursor: pointer; padding: 0;
  font-family: inherit;
}
.modal-btn-link:hover { text-decoration: underline; }

/* ===== 弹窗底部操作栏 ===== */
.modal-bottom-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
}
.modal-bottom-link {
  font-size: 12px;
  color: var(--text-secondary);
  text-decoration: none;
}
.modal-bottom-link:hover { color: var(--text-primary); }

/* ===== 动画 ===== */
@keyframes modalSlideIn {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== 登录弹窗样式 ===== */
.modal.modal-auth {
  border-radius: 20px;
  padding: 36px 36px 32px;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.modal.modal-auth .modal-close {
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  border-radius: 50%;
  color: var(--text-muted);
  font-size: 20px;
}
.modal.modal-auth .modal-close:hover {
  background: var(--white-05);
  color: var(--text-primary);
}

.modal.modal-auth .modal-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.modal.modal-auth .modal-hint {
  color: var(--warning);
  margin: -12px 0 16px;
  font-size: 13px;
}

.modal.modal-auth .auth-tabs {
  display: flex;
  gap: 32px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--divider);
}
.modal.modal-auth .auth-tab {
  background: none;
  border: none;
  padding: 8px 0 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  position: relative;
  transition: color 0.2s;
  font-family: inherit;
}
.modal.modal-auth .auth-tab.active {
  color: var(--text-primary);
  font-weight: 600;
}
.modal.modal-auth .auth-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.modal.modal-auth .modal-input {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  padding: 14px 16px;
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.modal.modal-auth .modal-input::placeholder {
  color: var(--text-muted);
}
.modal.modal-auth .modal-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.modal.modal-auth .modal-input + .modal-input {
  margin-top: 12px;
}

.modal.modal-auth .modal-input-row {
  gap: 10px;
  margin-top: 12px;
}
.modal.modal-auth .modal-input-row .modal-input {
  margin-top: 0;
}

.modal.modal-auth .modal-btn {
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 24px;
  transition: all 0.2s;
}
.modal.modal-auth .modal-btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}
.modal.modal-auth .modal-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--btn-primary-shadow);
  opacity: 0.9;
}
.modal.modal-auth .modal-btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.modal.modal-auth .modal-btn-secondary {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 13px 16px;
}
.modal.modal-auth .modal-btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  color: var(--text-primary);
}
.modal.modal-auth .modal-btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.modal.modal-auth .modal-error {
  color: var(--error);
  font-size: 12px;
  margin-top: 4px;
  margin-bottom: 4px;
}

.modal.modal-auth .auth-agreement {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 16px 0;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}
.modal.modal-auth .auth-agreement input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}
.modal.modal-auth .auth-agreement a {
  color: var(--text-secondary);
  text-decoration: none;
}
.modal.modal-auth .auth-agreement a:hover {
  color: var(--accent-light);
}

.modal.modal-auth .modal-bottom-bar {
  margin-top: 16px;
  justify-content: space-between;
}
.modal.modal-auth .modal-btn-link {
  font-size: 13px;
  color: var(--accent-light);
  font-weight: 400;
}
.modal.modal-auth .modal-btn-link:hover {
  color: var(--accent);
  text-decoration: none;
}
.modal.modal-auth .modal-bottom-link {
  font-size: 13px;
  color: var(--text-muted);
}
.modal.modal-auth .modal-bottom-link:hover {
  color: var(--text-primary);
}

/* 密码可见性图标 */
.modal.modal-auth .auth-input-wrap {
  position: relative;
}
.modal.modal-auth .auth-input-wrap .modal-input {
  padding-right: 44px;
}
.modal.modal-auth .auth-eye-icon {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  font-size: 16px;
  color: var(--text-muted);
  user-select: none;
  background: none;
  border: none;
  padding: 4px;
}
.modal.modal-auth .auth-eye-icon:hover {
  color: var(--text-secondary);
}

/* 注册面板 */
.modal-auth-register-hint {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}