/* auth_theme */
/* 登录/注册页两栏版式：全部限定在 .at-split 内，不影响其他页面 */
.at-split{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1fr);background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;min-height:560px}
.at-brand{position:relative;display:flex;flex-direction:column;padding:34px 32px;color:#e6edf3;background-color:#0f172a;background-image:radial-gradient(rgba(255,255,255,.075) 1px,transparent 1px);background-size:20px 20px;background-position:0 0;overflow:hidden}
.at-light .at-brand{background-color:var(--brand-soft);background-image:radial-gradient(rgba(31,136,61,.10) 1px,transparent 1px);color:var(--text)}
.at-brand-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.at-logo{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:var(--font-size-lg);font-weight:700;letter-spacing:-.02em}
.at-logo-dot{color:#3fb950}
.at-light .at-logo-dot{color:var(--brand)}
.at-tag{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:var(--font-size-xxs);letter-spacing:.14em;text-transform:uppercase;color:#8b949e;border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:2px 8px}
.at-light .at-tag{color:var(--text-subtle);border-color:rgba(31,136,61,.3)}
.at-brand-title{margin:26px 0 10px;font-size:24px;line-height:1.32;font-weight:600;letter-spacing:-.01em;color:#f0f6fc}
.at-light .at-brand-title{color:var(--text)}
.at-brand-desc{margin:0;font-size:var(--font-size-sm);line-height:1.75;color:#9aa7b4;max-width:34ch}
.at-light .at-brand-desc{color:var(--text-muted)}
.at-points{list-style:none;margin:22px 0 0;padding:0;display:flex;flex-direction:column;gap:10px}
.at-points li{display:flex;align-items:flex-start;gap:10px;font-size:var(--font-size-sm);line-height:1.6;color:#c9d4de}
.at-light .at-points li{color:var(--text)}
.at-num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:var(--font-size-xxs);color:#3fb950;padding-top:2px;flex:0 0 auto}
.at-light .at-num{color:var(--brand)}
.at-brand-foot{margin-top:auto;padding-top:24px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:var(--font-size-xxs);color:#8b949e;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.at-brand-foot b{color:#f0f6fc;font-size:var(--font-size-sm);font-weight:600}
.at-light .at-brand-foot{color:var(--text-subtle)}
.at-light .at-brand-foot b{color:var(--text)}
.at-brand-foot i{font-style:normal;color:#30363d}
.at-light .at-brand-foot i{color:var(--text-disabled)}
/* 右侧：去掉内核外壳与侧栏，只留表单本身 */
.at-form{padding:40px 44px;display:flex;flex-direction:column;justify-content:center;min-width:0}
.at-split .home-shell{background:transparent;border:0;box-shadow:none;padding:0;border-radius:0}
.at-split .forum-layout{display:block}
.at-split .main-panel{background:transparent;overflow:visible}
.at-split .sidebar{display:none}
.at-split .auth-tabs{margin:0 0 18px;padding:0;border-bottom:1px solid var(--line-soft)}
.at-split .auth-tabs .tab{position:relative;padding:0 2px 10px;margin-right:20px;background:none;border:0;color:var(--text-subtle);font-size:var(--font-size-sm)}
.at-split .auth-tabs .tab.active{color:var(--text);font-weight:600}
.at-split .auth-tabs .tab.active::after{content:"";position:absolute;left:0;right:20px;bottom:-1px;height:2px;background:var(--brand)}
.at-split .auth-panel{margin:0;padding:0;border:0;background:transparent;max-width:400px}
.at-split .auth-panel h2{margin:0 0 4px;font-size:22px;font-weight:600;letter-spacing:-.01em}
.at-sub{margin:0 0 20px;font-size:var(--font-size-sm);color:var(--text-muted);line-height:1.6}
.at-split .auth-panel form{display:flex;flex-direction:column;gap:0}
.at-split .auth-panel .grid{grid-template-columns:minmax(0,1fr);gap:6px;margin:0 0 14px;align-items:stretch}
.at-split .auth-panel .grid>span{font-size:var(--font-size-sm);font-weight:600;color:var(--text-muted)}
.at-split .auth-panel .grid>span small{display:block;margin-top:2px;font-weight:400;font-size:var(--font-size-xxs);color:var(--text-subtle)}
.at-split .auth-panel input[type=text],.at-split .auth-panel input[type=password],.at-split .auth-panel input[type=email]{width:100%;height:40px;box-sizing:border-box;padding:0 12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);font-size:13px;color:var(--text);transition:border-color var(--transition-normal),box-shadow var(--transition-normal)}
.at-split .auth-panel input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--focus-halo)}
.at-split .auth-panel input::placeholder{color:var(--text-disabled)}
.at-split .auth-panel button{width:100%;height:42px;margin-top:6px;border:1px solid var(--brand);border-radius:var(--radius);background:var(--brand);color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:background var(--transition-normal),border-color var(--transition-normal)}
.at-split .auth-panel button:hover{background:var(--brand-hover);border-color:var(--brand-hover);color:#fff}
.at-tip{margin:16px 0 0;font-size:var(--font-size-xs);line-height:1.7;color:var(--text-subtle)}
.at-tip a{color:var(--brand);text-decoration:none;font-weight:600}
.at-tip a:hover{text-decoration:underline}
/* 后台设置页：卡片分区 + 网格表单，紧凑无大留白 */
.at-admin{max-width:760px}
.at-admin-hint{margin:0 0 10px;color:var(--text-muted);font-size:var(--font-size-sm);line-height:1.6;max-width:none}
.at-sec{border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--panel);padding:12px 14px;margin:0 0 10px}
.at-sec-head{margin:0 0 10px;font-size:var(--font-size-xs);font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-subtle)}
.at-togs{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.at-tog{display:inline-flex;align-items:center;gap:8px;margin:0;font-size:var(--font-size-sm);color:var(--text);cursor:pointer}
.at-tog input{margin:0}
.at-tog select{height:30px;margin:0;padding:0 26px 0 8px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);font-size:var(--font-size-sm);color:var(--text)}
.at-tog-label{font-size:var(--font-size-sm);font-weight:600;color:var(--text-muted)}
.at-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 14px}
.at-field{display:flex;flex-direction:column;gap:4px;margin:0;min-width:0}
.at-field--full{grid-column:1/-1}
.at-field>span{font-size:var(--font-size-xs);font-weight:600;color:var(--text-muted)}
.at-field input[type=text],.at-field textarea{box-sizing:border-box;width:100%;max-width:none;height:34px;margin:0;padding:0 10px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);font-size:var(--font-size-sm);font-family:inherit;color:var(--text)}
.at-field textarea{height:auto;min-height:56px;padding:7px 10px;line-height:1.6;resize:vertical}
.at-field input:focus,.at-field textarea:focus{outline:none;border-color:var(--brand);background:var(--panel);box-shadow:0 0 0 3px var(--focus-halo)}
.at-actions-bar{display:flex;gap:8px;margin:12px 0 0}
@media (max-width:640px){
  .at-grid{grid-template-columns:1fr}
}
@media (max-width:820px){
  .at-split{grid-template-columns:minmax(0,1fr);min-height:0}
  .at-brand{padding:20px;gap:2px}
  .at-brand-title{margin:14px 0 6px;font-size:19px}
  .at-brand-desc{font-size:var(--font-size-xs);max-width:none}
  .at-points{display:none}
  .at-brand-foot{margin-top:12px;padding-top:0}
  .at-form{padding:22px 18px 26px}
  .at-split .auth-panel h2{font-size:19px}
}