/* ==========================================================================
   ChatBBS · Flarum 风格认证弹窗（登录 / 注册 / 找回密码）
   仅在 gateway 布局加载，不影响其它页面体积。

   UI 结构参考 Flarum（https://flarum.org）的 LogInModal / SignUpModal
   Flarum 采用 MIT License，Copyright (c) Flarum Foundation
   类名沿用其命名（Modal / Form-group / FormControl / Button）以便对照，
   样式数值与实现均为 ChatBBS 自行编写，未复制其 CSS 源码。
   详见源码根目录 THIRD-PARTY-NOTICES.md
   ========================================================================== */

.flarum-gate {
  --fl-primary: var(--color-primary, #4D698E);
  --fl-surface: #ffffff;
  --fl-input: #edf0f5;
  --fl-text: #1f2430;
  --fl-muted: #6b7280;
  --fl-placeholder: #9aa3b0;
  --fl-border: #e3e7ee;
  --fl-danger: #d83b30;
  --fl-success: #2e7d32;
  --fl-radius: 4px;

  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 36px 16px;
  color: var(--fl-text);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", Tahoma, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* 页面底色比弹窗暗一档，白色面板自然浮起来；不使用线条描边 */
body.gateway-body.flarum-gate { background: #e7ebf1; }

html[data-theme="dark"] .flarum-gate {
  --fl-surface: #1b212a;
  --fl-input: #232a34;
  --fl-text: #e6eaf2;
  --fl-muted: #95a1b5;
  --fl-placeholder: #7f8a9c;
  --fl-border: #333c4a;
}
html[data-theme="dark"] body.gateway-body.flarum-gate { background: #0e1116; }

/* ---------- 弹窗本体 ---------- */
.flarum-gate .Modal {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  background: var(--fl-surface);
  border: 0;
  border-radius: var(--fl-radius);
  box-shadow: 0 24px 60px rgba(16, 24, 40, .14), 0 4px 12px rgba(16, 24, 40, .06);
  animation: fl-modal-in .18s ease-out both;
}
.flarum-gate .Modal-content { position: relative; padding: 0; }

@keyframes fl-modal-in {
  from { opacity: 0; transform: translateY(8px) scale(.99); }
  to   { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .flarum-gate .Modal { animation: none; }
}

/* 关闭按钮（返回首页） */
.flarum-gate .Modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  color: var(--fl-muted);
  text-decoration: none;
  transition: background .15s, color .15s;
}
.flarum-gate .Modal-close:hover {
  background: var(--fl-input);
  color: var(--fl-text);
  text-decoration: none;
}

/* 提示条 */
.flarum-gate .flarum-alerts { padding: 16px 26px 0; }
.flarum-gate .flarum-alert {
  padding: 9px 12px;
  margin-bottom: 8px;
  font-size: 13px;
  line-height: 1.5;
  border-radius: 4px;
  border: 1px solid transparent;
}
.flarum-gate .flarum-alert--error {
  color: var(--fl-danger);
  background: rgba(216, 59, 48, .07);
  border-color: rgba(216, 59, 48, .28);
}
.flarum-gate .flarum-alert--success {
  color: var(--fl-success);
  background: rgba(46, 125, 50, .07);
  border-color: rgba(46, 125, 50, .26);
}

/* ---------- 头部 / 主体 / 底部 ---------- */
.flarum-gate .Modal-header {
  padding: 28px 26px 16px;
  text-align: center;
}
.flarum-gate .App-titleControl {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--fl-text);
}
.flarum-gate .Modal-body {
  padding: 2px 26px 14px;
}
.flarum-gate .Modal-footer {
  padding: 4px 26px 24px;
  border-top: 0;
  background: transparent;
  text-align: center;
  font-size: 13px;
  color: var(--fl-muted);
}
.flarum-gate .Modal-footer p { margin: 0; }
.flarum-gate .Modal-footer p + p { margin-top: 7px; }

/* 注册页内容较多：主体区域滚动 */
.flarum-gate .Modal-body.fl-scroll {
  max-height: min(64vh, 540px);
  overflow-y: auto;
  scrollbar-width: thin;
}
.flarum-gate .Modal-body.fl-scroll::-webkit-scrollbar { width: 6px; }
.flarum-gate .Modal-body.fl-scroll::-webkit-scrollbar-thumb {
  background: var(--fl-border);
  border-radius: 3px;
}

/* ---------- 表单 ---------- */
.flarum-gate .Form { margin: 0; }
.flarum-gate .Form--centered { text-align: left; }
.flarum-gate .Form-group { margin-bottom: 12px; }
.flarum-gate .Form-group:last-child { margin-bottom: 0; }
.flarum-gate .Form-group--check { margin-top: -2px; }

/* 输入框：用浅色色块区分，不用描边；内阴影制造轻微凹陷感 */
.flarum-gate .FormControl {
  display: block;
  width: 100%;
  height: 46px;
  padding: 0 14px;
  font: 14px/1.4 inherit;
  color: var(--fl-text);
  background: var(--fl-input);
  border: 0;
  border-radius: 4px;
  box-shadow: inset 0 1px 4px rgba(16, 24, 40, .08);
  transition: background .15s, box-shadow .15s;
  -webkit-appearance: none;
  appearance: none;
}
.flarum-gate .FormControl::placeholder { color: var(--fl-placeholder); opacity: 1; }
.flarum-gate .FormControl:focus {
  outline: 0;
  background: var(--fl-surface);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--fl-primary) 20%, transparent),
              inset 0 1px 2px rgba(16, 24, 40, .04);
}
.flarum-gate .FormControl:disabled { background: var(--fl-input); cursor: not-allowed; }

/* 复选框 */
.flarum-gate .checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--fl-muted);
  cursor: pointer;
}
.flarum-gate .checkbox input[type="checkbox"] {
  width: 15px;
  height: 15px;
  margin: 3px 0 0;
  accent-color: var(--fl-primary);
  flex: none;
}

/* 验证码 */
.flarum-gate .fl-captcha { display: flex; gap: 10px; align-items: stretch; }
.flarum-gate .fl-captcha .FormControl { flex: 1; min-width: 0; }
.flarum-gate .fl-captcha img {
  height: 46px;
  width: 112px;
  object-fit: cover;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
  background: #fff;
  box-shadow: inset 0 1px 4px rgba(16, 24, 40, .08);
}

/* 协议全文 */
.flarum-gate .fl-agree {
  margin-top: 10px;
  max-height: 150px;
  overflow: auto;
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--fl-muted);
  background: var(--fl-input);
  border: 0;
  border-radius: 4px;
}
.flarum-gate .hide { display: none !important; }
.flarum-gate .fl-link { color: var(--fl-primary); text-decoration: none; }
.flarum-gate .fl-link:hover { text-decoration: underline; }

/* ---------- 按钮 ---------- */
.flarum-gate .Button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 16px;
  font: 600 14px/1 inherit;
  color: var(--fl-text);
  background: var(--fl-input);
  border: 0;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, color .15s, box-shadow .15s;
}
.flarum-gate .Button-label { display: inline-flex; align-items: center; }
.flarum-gate .Button-labelText { display: inline-block; }

.flarum-gate .Button--primary {
  min-height: 46px;
  color: #fff;
  background: var(--fl-primary);
  border: 0;
  box-shadow: none;
}
.flarum-gate .Button--primary:hover {
  filter: brightness(.93);
  text-decoration: none;
}
.flarum-gate .Button--primary:active { transform: translateY(.5px); }
.flarum-gate .Button--primary:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--fl-primary) 30%, transparent);
}
.flarum-gate .Button--block { display: flex; width: 100%; }

/* 文字链接式按钮（忘记密码 / 注册 / 登录） */
.flarum-gate .Button--text,
.flarum-gate .Button--link {
  padding: 0;
  min-height: 0;
  color: var(--fl-primary);
  background: transparent;
  border: 0;
  border-radius: 0;
  font-weight: 600;
  font-size: 13px;
  box-shadow: none;
}
.flarum-gate .Button--text:hover,
.flarum-gate .Button--link:hover {
  color: var(--fl-primary);
  filter: brightness(.85);
  text-decoration: underline;
  background: transparent;
}

/* ---------- 移动端 ---------- */
@media (max-width: 480px) {
  .flarum-gate { padding: 16px 12px; align-items: flex-start; padding-top: 8vh; }
  .flarum-gate .Modal { max-width: 100%; border-radius: 4px; }
  .flarum-gate .Modal-header { padding: 24px 20px 14px; }
  .flarum-gate .Modal-body { padding: 2px 20px 12px; }
  .flarum-gate .Modal-footer { padding: 4px 20px 20px; }
  .flarum-gate .flarum-alerts { padding: 14px 20px 0; }
  .flarum-gate .Modal-body.fl-scroll { max-height: none; }
}