:root{
  --bg-base:#0a0d16;
  --panel:#131826;
  --panel-2:#161c2c;
  --border:#232a3d;
  --border-soft:#1c2233;
  --text-hi:#f4f6fb;
  --text-mid:#9aa3b8;
  --text-dim:#5f6880;
  --orange:#ff7a1a;
  --red:#e8452c;
  --green:#2ecc71;
  --blue:#4d8dff;
  --radius:14px;
  --radius-sm:9px;
  font-size:16px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg-base);
  color:var(--text-hi);
  font-family:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;
  min-height:100vh;
  position:relative;
  overflow-x:hidden;
}

.bg-glow{
  position:fixed;
  inset:0;
  z-index:0;
  background:
    radial-gradient(ellipse 900px 600px at 88% -6%, rgba(232,69,44,0.35), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 20%, rgba(255,122,26,0.18), transparent 65%),
    var(--bg-base);
  pointer-events:none;
}

.app{
  position:relative;
  z-index:1;
  max-width:1180px;
  margin:0 auto;
  padding:28px 28px 40px;
}

/* Header */
.top-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.brand{display:flex;align-items:baseline;gap:10px;}
.brand-mark{
  font-size:26px;
  font-weight:800;
  letter-spacing:-0.5px;
  color:#fff;
}
.brand-mark span{color:var(--orange);}
.brand-sub{font-size:12px;color:var(--text-dim);}
.brand-sub strong{color:var(--text-mid);font-weight:600;}

.ssl-badge{
  display:flex;align-items:center;gap:6px;
  font-size:11px;letter-spacing:0.06em;color:var(--green);
  background:rgba(46,204,113,0.08);
  border:1px solid rgba(46,204,113,0.25);
  padding:6px 12px;border-radius:999px;
  font-weight:600;
}
.ssl-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green);}

.header-rule{
  height:1px;
  margin:22px 0 26px;
  background:linear-gradient(90deg, rgba(255,122,26,0.55), rgba(232,69,44,0.05));
}

/* Chapter intro */
.chapter-intro{
  display:flex;justify-content:space-between;align-items:flex-start;gap:20px;
  margin-bottom:18px;
}
.chapter-intro-left{display:flex;gap:16px;align-items:flex-start;}
.chapter-icon{
  width:44px;height:44px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, rgba(77,141,255,0.18), rgba(77,141,255,0.05));
  border:1px solid rgba(77,141,255,0.35);
  border-radius:11px;color:var(--blue);font-size:18px;
}
.chapter-intro h1{font-size:26px;margin:0 0 6px;font-weight:700;letter-spacing:-0.3px;}
.chapter-intro p{margin:0;color:var(--text-mid);font-size:14px;line-height:1.5;}

.chapter-count{text-align:right;flex:none;}
.count-num{font-size:32px;font-weight:800;color:#fff;line-height:1;}
.count-label{font-size:11px;color:var(--text-dim);margin-top:4px;}

.progress-track{
  height:4px;border-radius:4px;background:var(--border-soft);overflow:hidden;margin-bottom:20px;
}
.progress-fill{
  height:100%;
  background:linear-gradient(90deg,#ffcf4d,var(--orange),var(--red));
  width:0%;
  transition:width .4s ease;
}

/* Chip nav */
.chip-nav{
  display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px;
}
.chip{
  font-size:12.5px;
  padding:7px 13px;
  border-radius:999px;
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--text-dim);
  cursor:pointer;
  display:flex;align-items:center;gap:6px;
  transition:border-color .15s, color .15s;
  white-space:nowrap;
}
.chip:hover{color:var(--text-mid);}
.chip .chip-dot{width:6px;height:6px;border-radius:50%;background:var(--border);flex:none;}
.chip.done{color:var(--green);}
.chip.done .chip-dot{background:var(--green);}
.chip.active{border-color:var(--orange);color:#fff;background:rgba(255,122,26,0.08);}
.chip.active .chip-dot{background:var(--orange);}

/* Main grid */
.main-grid{
  display:grid;
  grid-template-columns:280px 1fr;
  gap:22px;
  align-items:start;
}

.assist-panel{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:22px 20px;
  position:sticky;
  top:24px;
}
.assist-label{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:18px;}
.assist-title{
  font-size:10.5px;font-weight:700;letter-spacing:0.08em;color:var(--orange);line-height:1.4;
}
.assist-status{
  display:flex;align-items:center;gap:5px;font-size:10.5px;color:var(--green);white-space:nowrap;
}
.pulse{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 6px var(--green);animation:pulse 1.6s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}

.orbit-wrap{
  position:relative;width:150px;height:150px;margin:6px auto 20px;
}
.orbit-ring{
  position:absolute;border-radius:50%;border:1px dashed rgba(255,122,26,0.3);
}
.ring-outer{inset:0;animation:spin 26s linear infinite;}
.ring-inner{inset:22px;border-color:rgba(77,141,255,0.35);animation:spin 18s linear infinite reverse;}
@keyframes spin{to{transform:rotate(360deg);}}
.orbit-dot{
  position:absolute;top:6px;left:50%;width:8px;height:8px;margin-left:-4px;
  border-radius:50%;background:var(--orange);box-shadow:0 0 10px var(--orange);
  animation:spin 26s linear infinite;
  transform-origin:4px 69px;
}
.orbit-core{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:26px;color:var(--blue);
}

.assist-chapter-num{font-size:11px;color:var(--text-dim);font-weight:600;margin-bottom:4px;}
.assist-chapter-title{font-size:16px;font-weight:700;margin-bottom:8px;}
.assist-chapter-desc{font-size:13px;color:var(--text-mid);line-height:1.55;margin:0;}

.assist-meta{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--border-soft);
  display:flex;flex-direction:column;gap:8px;
}
.meta-row{display:flex;justify-content:space-between;font-size:12px;color:var(--text-dim);}
.meta-row b{color:var(--text-mid);font-weight:600;}
.meta-tag{
  display:inline-block;font-size:10.5px;color:var(--blue);background:rgba(77,141,255,0.08);
  border:1px solid rgba(77,141,255,0.25);padding:4px 8px;border-radius:6px;margin-top:2px;
}

/* Question panel */
.question-panel{display:flex;flex-direction:column;gap:16px;}
.q-card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:22px 22px 20px;
}
.q-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px;}
.q-text{font-size:15.5px;font-weight:600;line-height:1.5;margin:0;}
.q-text .req{color:var(--red);margin-left:2px;}
.q-framework{
  flex:none;font-size:10px;color:var(--blue);background:rgba(77,141,255,0.08);
  border:1px solid rgba(77,141,255,0.22);padding:4px 9px;border-radius:999px;white-space:nowrap;
}

.q-help{font-size:12.5px;color:var(--text-dim);margin:-8px 0 14px;line-height:1.5;}

.options-grid{display:flex;flex-wrap:wrap;gap:10px;}
.opt-btn{
  display:flex;align-items:center;gap:9px;
  background:var(--panel-2);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:11px 16px;
  font-size:13.5px;color:var(--text-mid);
  cursor:pointer;
  transition:border-color .15s, color .15s, background .15s;
}
.opt-btn:hover{border-color:#3a4360;color:var(--text-hi);}
.opt-icon{
  width:20px;height:20px;flex:none;border-radius:50%;
  border:1.5px solid var(--border);
  display:flex;align-items:center;justify-content:center;
}
.opt-icon i{width:8px;height:8px;border-radius:50%;background:transparent;}
.opt-btn.selected{
  border-color:var(--orange);color:#fff;background:rgba(255,122,26,0.06);
}
.opt-btn.selected .opt-icon{border-color:var(--orange);}
.opt-btn.selected .opt-icon i{background:var(--orange);}

.text-field-wrap{position:relative;}
.text-field{
  width:100%;
  background:var(--panel-2);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:13px 90px 13px 16px;
  color:var(--text-hi);
  font-size:14px;font-family:inherit;
  outline:none;
}
.text-field:focus{border-color:var(--orange);}
.textarea-field{min-height:88px;resize:vertical;padding:13px 16px;}
.suggest-btn{
  position:absolute;top:9px;right:9px;
  display:flex;align-items:center;gap:4px;
  background:rgba(77,141,255,0.1);
  border:1px solid rgba(77,141,255,0.3);
  color:var(--blue);font-size:11px;font-weight:600;
  padding:5px 10px;border-radius:999px;cursor:pointer;
}
.suggest-btn:hover{background:rgba(77,141,255,0.18);}

.leaders{margin-top:12px;}
.leaders-label{font-size:10px;letter-spacing:0.06em;color:var(--text-dim);margin-bottom:8px;}
.leaders-chips{display:flex;flex-wrap:wrap;gap:8px;}
.leader-chip{
  display:flex;align-items:center;gap:5px;
  font-size:12px;color:var(--text-mid);
  background:var(--panel-2);border:1px solid var(--border);
  padding:5px 11px;border-radius:999px;cursor:pointer;
}
.leader-chip:hover{border-color:var(--orange);color:#fff;}
.leader-chip .star{color:#ffb84d;font-size:11px;}

/* Multi-select for checkbox-style questions */
.opt-btn.multi.selected .opt-icon{border-radius:5px;}
.opt-btn.multi .opt-icon{border-radius:5px;}
.opt-btn.multi .opt-icon i{border-radius:2px;}

/* Footer nav */
.bottom-nav{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:28px;
}
.btn-ghost{
  background:transparent;border:1px solid var(--border);color:var(--text-mid);
  padding:12px 20px;border-radius:var(--radius-sm);font-size:13.5px;cursor:pointer;font-weight:600;
}
.btn-ghost:hover{border-color:#3a4360;color:var(--text-hi);}
.btn-ghost:disabled{opacity:.35;cursor:not-allowed;}
.nav-right{display:flex;align-items:center;gap:14px;}
.enter-hint{font-size:11.5px;color:var(--text-dim);}
.enter-hint kbd{
  background:var(--panel-2);border:1px solid var(--border);border-radius:5px;
  padding:2px 6px;font-size:10.5px;color:var(--text-mid);
}
.btn-primary{
  background:linear-gradient(90deg,var(--orange),var(--red));
  border:none;color:#fff;font-weight:700;font-size:14px;
  padding:13px 26px;border-radius:var(--radius-sm);cursor:pointer;
  box-shadow:0 8px 22px -8px rgba(232,69,44,0.6);
}
.btn-primary:hover{filter:brightness(1.06);}
.btn-primary:disabled{opacity:.4;cursor:not-allowed;box-shadow:none;}

/* Toast */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--panel);border:1px solid var(--border);color:var(--text-hi);
  padding:12px 20px;border-radius:10px;font-size:13px;
  opacity:0;pointer-events:none;transition:opacity .25s, transform .25s;
  z-index:50;box-shadow:0 10px 30px rgba(0,0,0,.4);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* Summary / review page */
.summary-block{margin-bottom:18px;}
.summary-section-title{
  font-size:12px;letter-spacing:0.04em;color:var(--orange);font-weight:700;
  margin:0 0 10px;text-transform:uppercase;
}
.summary-row{
  display:flex;justify-content:space-between;gap:16px;
  padding:10px 0;border-bottom:1px solid var(--border-soft);font-size:13.5px;
}
.summary-row:last-child{border-bottom:none;}
.summary-q{color:var(--text-mid);max-width:60%;}
.summary-a{color:var(--text-hi);font-weight:600;text-align:right;}
.summary-a.empty{color:var(--text-dim);font-style:italic;font-weight:400;}

/* Responsive */
@media (max-width:860px){
  .main-grid{grid-template-columns:1fr;}
  .assist-panel{position:static;}
  .chapter-intro{flex-direction:column;}
  .chapter-count{text-align:left;}
  .app{padding:20px 16px 32px;}
}

@media (prefers-reduced-motion: reduce){
  .ring-outer,.ring-inner,.orbit-dot,.pulse{animation:none;}
}

.brand-logo {
  max-height: 98px;
  width: auto;
  display: block;
  object-fit: contain;
}