:root{
  --sb-bg:#17181c; --sb-fg:#d7d9de; --sb-dim:#8b8e98;
  --main-bg:#f7f7f8; --card:#ffffff; --border:#e3e4e8;
  --accent:#4f6ef7; --accent-2:#3b5bdb; --text:#202124; --dim:#6b6e76;
  --ok:#2fbf71; --bad:#e5484d; --warn:#f5a623;
  --radius:14px; --shadow:0 10px 40px rgba(0,0,0,.18);
  font-size:15px;
}
*{box-sizing:border-box; margin:0; padding:0}
html,body{height:100%}
body{font-family:ui-sans-serif,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--main-bg); color:var(--text); overflow:hidden}
.hidden{display:none!important}
button{font:inherit; cursor:pointer; border:0; background:none; color:inherit}
input,textarea,select{font:inherit; color:inherit}
textarea{resize:vertical}
.mono{font-family:ui-monospace,Menlo,Consolas,monospace; font-size:13px}

/* ---------- login ---------- */
.login-wrap{height:100%;display:grid;place-items:center;
  background:radial-gradient(1200px 600px at 70% -10%,#2b3559 0%,#14151a 55%)}
.login-card{width:min(400px,92vw);background:var(--card);border-radius:18px;padding:38px 34px;
  box-shadow:var(--shadow);text-align:center}
.login-logo{font-size:40px;color:var(--accent);margin-bottom:6px}
.login-card h1{font-size:22px;margin-bottom:4px}
.login-sub{color:var(--dim);margin-bottom:22px;font-size:14px}
.login-card label{display:block;text-align:left;font-size:13px;color:var(--dim);margin-bottom:14px}
.login-card input{width:100%;margin-top:5px;padding:10px 12px;border:1px solid var(--border);
  border-radius:10px;background:#fbfbfc;outline:none}
.login-card input:focus{border-color:var(--accent)}
.login-error{background:#fdecec;color:#b3261e;font-size:13px;border-radius:8px;padding:8px;margin-bottom:10px}
.btn-primary{background:var(--accent);color:#fff;border-radius:10px;padding:10px 18px;
  transition:background .15s}
.btn-primary:hover{background:var(--accent-2)}
.btn-primary:disabled{opacity:.6;cursor:wait}
#login-form .btn-primary{width:100%}
.btn-ghost{border:1px solid var(--border);background:#fff;border-radius:9px;padding:7px 12px;font-size:13px}
.btn-ghost:hover{background:#f2f3f7}

/* ---------- layout ---------- */
.app{display:flex;height:100%}
.sidebar{width:250px;min-width:250px;background:var(--sb-bg);color:var(--sb-fg);
  display:flex;flex-direction:column;padding:14px 10px;gap:4px}
.sb-head{display:flex;align-items:center;gap:8px;padding:6px 8px 14px}
.sb-logo{color:var(--accent);font-size:20px}
.sb-title{font-weight:650;letter-spacing:.2px}
.sb-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--sb-dim);padding:8px 10px 4px}
.mode-nav{display:flex;flex-direction:column;gap:3px}
.mode-btn{display:flex;align-items:baseline;gap:9px;padding:10px 12px;border-radius:10px;
  color:var(--sb-fg);text-align:left;font-size:14.5px;transition:background .12s}
.mode-btn .mi{color:var(--sb-dim);width:16px;text-align:center}
.mode-btn small{color:var(--sb-dim);font-size:11px;margin-left:auto;font-family:ui-monospace,Menlo,Consolas,monospace}
.mode-btn:hover{background:#22242a}
.mode-btn.active{background:var(--accent);color:#fff}
.mode-btn.active .mi,.mode-btn.active small{color:#dfe6ff}
.sb-foot{margin-top:auto;display:flex;align-items:center;gap:8px;padding:10px 6px 2px;
  border-top:1px solid #26282e;flex-wrap:wrap}
.sb-link{color:var(--sb-dim);font-size:13px;padding:4px 6px;border-radius:7px}
.sb-link:hover{color:#fff;background:#26282e}
.sb-user{flex:1;color:var(--sb-dim);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dot{width:9px;height:9px;border-radius:50%;flex:none}
.dot-grey{background:#5a5d66}.dot-ok{background:var(--ok)}.dot-bad{background:var(--bad)}

.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{display:flex;align-items:center;gap:10px;padding:10px 16px;border-bottom:1px solid var(--border);
  background:var(--card)}
.topbar-title{font-weight:650;flex:1}
.topbar-right select{padding:6px 10px;border:1px solid var(--border);border-radius:9px;background:#fbfbfc;
  max-width:320px;font-size:13px;color:var(--dim)}
.icon-btn{padding:6px 8px;border-radius:8px;color:var(--dim)}
.icon-btn:hover{background:#eef0f4;color:var(--text)}
#btn-menu{display:none}

/* ---------- two-column work area ---------- */
.work{flex:1;overflow-y:auto;display:grid;grid-template-columns:minmax(430px,560px) 1fr;
  gap:20px;padding:20px 22px 40px;align-items:start}
.form-col{display:flex;flex-direction:column;gap:14px;min-width:0}
.result-col{display:flex;flex-direction:column;gap:14px;min-width:0;position:sticky;top:0}

.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px}
.card-title{font-size:15px;font-weight:650;margin-bottom:4px}
.hint{font-size:12.5px;color:var(--dim);margin-bottom:8px;line-height:1.45}
.req{color:var(--bad)}
.card textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;
  background:#fbfbfc;outline:none;font-size:14px;line-height:1.5}
.card textarea:focus{border-color:var(--accent)}
.card textarea.mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px}
details summary{cursor:pointer;font-size:14px;font-weight:600}
details summary small{color:var(--dim);font-weight:400;margin-left:6px}
details[open] summary{margin-bottom:10px}
.check{display:flex;gap:8px;align-items:center;font-size:13.5px;color:var(--dim);margin-top:10px}
.field-row{display:flex;gap:10px;flex-wrap:wrap}
.field{display:block;font-size:12.5px;color:var(--dim);margin:10px 0 0;flex:1;min-width:140px}
.field input{width:100%;margin-top:4px;padding:8px 10px;border:1px solid var(--border);border-radius:9px;
  background:#fbfbfc;outline:none;font-size:14px}
.field input:focus,.field textarea:focus{border-color:var(--accent)}
.field textarea{width:100%;margin-top:4px;padding:8px 10px;border:1px solid var(--border);border-radius:9px;
  background:#fbfbfc;outline:none;font-size:14px}
#q-id{max-width:200px;font-family:ui-monospace,Menlo,Consolas,monospace}

/* dynamic rows */
.row-line{display:flex;gap:8px;align-items:center;margin-bottom:7px}
.row-line input{flex:1;padding:8px 10px;border:1px solid var(--border);border-radius:9px;background:#fbfbfc;
  outline:none;font-size:14px}
.row-line input:first-of-type{max-width:180px;font-family:ui-monospace,Menlo,Consolas,monospace}
.row-line input:focus{border-color:var(--accent)}
.row-idx{width:22px;text-align:center;color:var(--dim);font-size:13px;font-family:ui-monospace,Menlo,Consolas,monospace}
.row-del{color:var(--dim);padding:4px 7px;border-radius:7px}
.row-del:hover{background:#fdecec;color:var(--bad)}

.run-row{display:flex;align-items:center;gap:12px}
.btn-run{font-size:15px;padding:11px 22px}
.run-status{font-size:13px;color:var(--dim)}
.preview summary{font-size:13.5px}
.preview pre{white-space:pre-wrap;word-break:break-word;background:#15171d;color:#e6e6e6;
  border-radius:10px;padding:12px;max-height:340px;overflow:auto}

/* ---------- results ---------- */
.result-empty{text-align:center;color:var(--dim);padding:56px 20px}
.re-logo{font-size:40px;color:var(--accent);margin-bottom:10px}
.result-empty p{font-size:14px;line-height:1.6}
.meta-row{font-size:12.5px;color:var(--dim);padding:0 4px}
.result-error h3{font-size:14.5px;line-height:1.5}
.answer-card .ac-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.ac-id{font-weight:650;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14px}
.chip{font-size:11.5px;border:1px solid var(--border);border-radius:999px;padding:2px 9px;color:var(--dim);background:#fbfbfc}
.chip-type{background:#eef0ff;border-color:#d6ddff;color:#3b5bdb}
.ac-verdict{margin:4px 0 12px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.verdict{font-size:22px;font-weight:750;letter-spacing:.2px}
.v-yes{color:var(--ok)} .v-no{color:var(--bad)} .v-pick{color:var(--accent)} .v-score{color:#8a4fd8}
.verdict-sub{font-size:13.5px;color:var(--dim)}
.bars{display:flex;flex-direction:column;gap:6px}
.bar-row{display:grid;grid-template-columns:150px 1fr 56px;gap:9px;align-items:center}
.bar-row.chosen .bar-label{font-weight:650;color:var(--text)}
.bar-label{font-size:12.5px;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bar-track{height:9px;background:#eef0f4;border-radius:99px;overflow:hidden}
.bar-fill{display:block;height:100%;background:#c3cdea;border-radius:99px;transition:width .3s}
.bar-row.chosen .bar-fill{background:var(--accent)}
.bar-val{font-size:12px;color:var(--dim);text-align:right;font-family:ui-monospace,Menlo,Consolas,monospace}
.diag{margin-top:10px;font-size:12px;color:var(--dim)}
.diag-warn{color:#9a6b00;background:#fff7e6;border-radius:8px;padding:6px 9px}
.card pre.mono{white-space:pre-wrap;word-break:break-word;background:#15171d;color:#e6e6e6;
  border-radius:10px;padding:12px;margin-top:8px;max-height:400px;overflow:auto}

/* ---------- toast ---------- */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);background:#202124;color:#fff;
  padding:10px 18px;border-radius:10px;font-size:14px;box-shadow:var(--shadow);z-index:99;animation:fadein .2s;
  max-width:80vw}
@keyframes fadein{from{opacity:0;transform:translateX(-50%) translateY(6px)}}

/* ---------- responsive ---------- */
@media (max-width:1080px){ .work{grid-template-columns:1fr} .result-col{position:static} }
@media (max-width:820px){
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:40;transform:translateX(-100%);transition:transform .2s}
  .sidebar.open{transform:none}
  #btn-menu{display:block}
}