:root{
  --primary:#053BEE; --primary-dark:#032CB8; --ink:#000A1B; --ink-muted:#4A5568;
  --ink-faint:#7A8597; --rule:#E2E6EC; --surface:#F5F7FA; --white:#fff;
  --green:#05604F; --red:#D93520; --amber:#B7791F;
  --font:'DM Sans',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
/* [hidden] must beat class-level display rules (.login/.app/.panel set display:flex,
   which otherwise ties [hidden] on specificity and wins by source order). */
[hidden]{display:none !important}
html,body{height:100%}
body{font-family:var(--font);color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased}
.dot{width:8px;height:8px;border-radius:50%;background:var(--primary);display:inline-block}
.btn{font-family:var(--font);font-size:13px;font-weight:600;padding:8px 14px;border-radius:9px;border:1px solid var(--rule);background:var(--white);color:var(--ink);cursor:pointer;transition:background .15s,border-color .15s}
.btn:hover{background:var(--surface)}
.btn-primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-primary:hover{background:var(--primary)}
.btn-ghost{border-color:transparent;background:transparent;color:var(--ink-muted)}
.btn-ghost:hover{background:var(--surface)}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* Login */
.login{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,#F2F5FF 0%,#fff 60%)}
.login-card{width:min(420px,92vw);background:var(--white);border:1px solid var(--rule);border-radius:20px;padding:40px 36px;box-shadow:0 20px 60px rgba(0,10,27,.10);text-align:left}
.login-brand{font-size:13px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:9px;margin-bottom:22px}
.login-card h1{font-size:34px;font-weight:600;letter-spacing:-.02em;margin-bottom:10px}
.login-sub{font-size:15px;color:var(--ink-muted);line-height:1.55;margin-bottom:26px}
#gbtn{min-height:44px;display:flex}
.login-err{margin-top:16px;font-size:13px;color:var(--red);background:#FEF2F0;border:1px solid #F5CDC5;border-radius:9px;padding:10px 13px;line-height:1.45}
.login-foot{margin-top:24px;font-size:12px;color:var(--ink-faint)}

/* App */
.app{display:flex;flex-direction:column;height:100vh}
.bar{flex:0 0 auto;display:flex;align-items:center;gap:16px;padding:10px 20px;border-bottom:1px solid var(--rule);background:rgba(255,255,255,.96);backdrop-filter:blur(10px)}
.bar-brand{font-size:14px;font-weight:600;display:flex;align-items:center;gap:9px}
.bar-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.admin-btns{display:flex;gap:8px}
.ver-tag{font-size:11px;color:var(--ink-faint);font-family:ui-monospace,Menlo,monospace}
.who{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-muted)}
.who img{width:26px;height:26px;border-radius:50%;object-fit:cover;background:var(--surface)}
.who img:not([src]){display:none}
.role-tag{font-size:10px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:2px 7px;border-radius:999px;background:var(--surface);color:var(--ink-faint)}
.role-tag.admin{background:#E8EDFF;color:var(--primary)}
.doc{flex:1 1 auto;width:100%;border:0}

/* Slide-over panel */
.panel-backdrop{position:fixed;inset:0;background:rgba(0,10,27,.45);z-index:40}
.panel{position:fixed;top:0;right:0;bottom:0;width:min(560px,100vw);background:var(--white);z-index:50;box-shadow:-8px 0 32px rgba(0,10,27,.14);display:flex;flex-direction:column}
.panel-head{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid var(--rule)}
.panel-head h2{font-size:19px;font-weight:600;letter-spacing:-.01em}
.panel-body{flex:1 1 auto;overflow-y:auto;padding:22px 24px 60px}
.panel-body h3{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);margin:18px 0 10px}
.panel-body h3:first-child{margin-top:0}
.panel-body p{font-size:14px;color:var(--ink-muted);line-height:1.55;margin-bottom:12px}
textarea,input[type=text]{width:100%;font-family:var(--font);font-size:14px;border:1px solid var(--rule);border-radius:11px;padding:12px 14px;outline:none;resize:vertical;line-height:1.5}
textarea:focus,input[type=text]:focus{border-color:var(--primary)}
.row{display:flex;gap:10px;align-items:center;margin-top:12px}
.hint{font-size:12px;color:var(--ink-faint);line-height:1.5;margin-top:8px}
.spinner{width:15px;height:15px;border:2px solid #cbd5e1;border-top-color:var(--primary);border-radius:50%;display:inline-block;animation:spin .7s linear infinite;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}

.ver{border:1px solid var(--rule);border-radius:12px;padding:14px 16px;margin-bottom:11px}
.ver.cur{border-color:var(--primary);background:#F7F9FF}
.ver-top{display:flex;align-items:center;gap:8px;justify-content:space-between}
.ver-n{font-weight:700;font-size:14px}
.ver-badge{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:2px 8px;border-radius:999px;background:var(--surface);color:var(--ink-faint)}
.ver-badge.seed{background:#EDFAF4;color:var(--green)}
.ver-badge.restore{background:#FEF6E7;color:var(--amber)}
.ver-badge.cur{background:#E8EDFF;color:var(--primary)}
.ver-meta{font-size:12px;color:var(--ink-faint);margin:4px 0 8px}
.ver-sum{font-size:13.5px;color:var(--ink);line-height:1.5}
.ver-prompt{font-size:12.5px;color:var(--ink-muted);margin-top:6px;padding:8px 10px;background:var(--surface);border-radius:8px;line-height:1.5;white-space:pre-wrap}
.ver-actions{margin-top:10px;display:flex;gap:8px}

.src{border:1px solid var(--rule);border-radius:11px;padding:12px 14px;margin-bottom:9px;display:flex;align-items:flex-start;gap:10px}
.src-main{flex:1}
.src-title{font-weight:600;font-size:14px}
.src-meta{font-size:12px;color:var(--ink-faint);margin-top:2px}
.src-err{color:var(--red)}
.tabs{display:flex;gap:6px;margin-bottom:14px}
.tab{font-size:13px;font-weight:600;padding:7px 13px;border-radius:9px;border:1px solid var(--rule);background:var(--white);cursor:pointer;color:var(--ink-muted)}
.tab.on{background:var(--ink);color:#fff;border-color:var(--ink)}

.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);z-index:60;background:var(--ink);color:#fff;font-size:13.5px;font-weight:500;padding:12px 20px;border-radius:11px;box-shadow:0 10px 30px rgba(0,10,27,.3);max-width:80vw}
.toast.err{background:var(--red)}
.toast.ok{background:var(--green)}