:root{
  --bg:#09111f;
  --bg2:#0f172a;
  --card:rgba(255,255,255,.08);
  --line:rgba(255,255,255,.10);
  --text:#e5eefb;
  --muted:#9db0cf;
  --accent:#2563eb;
  --accent2:#22c55e;
  --danger:#ef4444;
  --warning:#f59e0b;
  --top:#22c55e;
  --end:#ef4444;
  --mid:#3b82f6;
  --bottom:#10b981;
  --stirrup:#f59e0b;
  --shadow:0 18px 40px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,'Noto Sans Thai',sans-serif;background:
radial-gradient(circle at top left, rgba(37,99,235,.18), transparent 30%),
radial-gradient(circle at top right, rgba(34,197,94,.12), transparent 25%),
linear-gradient(180deg,var(--bg),var(--bg2));color:var(--text);min-height:100%}
a{color:inherit;text-decoration:none}
body{min-height:100vh}
.app-shell{display:flex;min-height:100vh}
.sidebar{width:280px;padding:24px;display:flex;flex-direction:column;gap:24px;border-right:1px solid var(--line);position:sticky;top:0;height:100vh}
.glass{backdrop-filter:blur(18px);background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:24px}
.brand{display:flex;gap:14px;align-items:center}
.brand-mark{width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--accent),#7c3aed);display:grid;place-items:center;font-weight:800;font-size:22px}
.brand small,.muted{color:var(--muted)}
.nav{display:grid;gap:10px}
.nav a{padding:14px 16px;border-radius:16px;color:var(--muted);transition:.24s ease}
.nav a:hover,.nav a.active{background:rgba(255,255,255,.08);color:#fff;transform:translateX(3px)}
.sidebar-foot{margin-top:auto;color:var(--muted);display:grid;gap:4px}
.main-content{flex:1;padding:28px 30px 80px}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:22px}
.page-head h1{margin:8px 0 6px;font-size:2rem}
.hero-pill,.badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.08);color:#d4e3ff;font-size:.88rem}
.summary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:20px}
.summary-grid.compact{grid-template-columns:repeat(3,minmax(0,1fr));margin-bottom:18px}
.summary-card{padding:20px;display:grid;gap:8px}
.summary-card strong{font-size:1.6rem}
.table-wrap,.form-shell,.preview-shell,.note-card{padding:22px}
.section-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px}
.data-table{width:100%;border-collapse:collapse}
.data-table th,.data-table td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.data-table thead th{font-size:.9rem;color:#c7d9f5;background:rgba(255,255,255,.03)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:16px;padding:12px 16px;font-weight:700;cursor:pointer;transition:.24s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--accent),#6d28d9);color:#fff}
.btn-soft{background:rgba(255,255,255,.08);color:#fff}
.btn-danger{background:rgba(239,68,68,.14);color:#fecaca}
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}
.auth-card{max-width:460px;width:100%;padding:30px}
.auth-form,.form-grid{display:grid;gap:14px}
.auth-form input,.form-grid input,.form-grid select,.form-grid textarea, .beam-grid input, .beam-grid select, .beam-grid textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.05);color:#fff;outline:none}
label{display:grid;gap:8px;font-size:.96rem;color:#dbe8ff}
.auth-links{margin-top:16px;display:flex;gap:8px;color:var(--muted)}
.hint-box{margin-top:16px;padding:14px;border-radius:16px;background:rgba(255,255,255,.04);color:var(--muted)}
.alert{padding:14px 16px;border-radius:16px;margin-bottom:16px}
.alert.success{background:rgba(34,197,94,.14);color:#bbf7d0}
.alert.error{background:rgba(239,68,68,.14);color:#fecaca}
.form-grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.col-span-2{grid-column:span 2}
.col-span-3{grid-column:span 3}
.workspace-grid{display:grid;grid-template-columns:1.25fr .95fr;gap:18px;margin-top:18px}
.right-stack{display:grid;gap:18px}
.beam-card{padding:18px;margin-bottom:14px;border-radius:22px;background:rgba(255,255,255,.04);border:1px solid var(--line);position:relative;overflow:hidden}
.beam-card:before{content:'';position:absolute;inset:auto auto 0 -20px;width:180px;height:180px;background:radial-gradient(circle, rgba(37,99,235,.15), transparent 65%);pointer-events:none}
.beam-card-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px}
.beam-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.beam-grid .wide{grid-column:span 2}
.beam-grid .full{grid-column:1/-1}
.canvas-wrap{padding:14px;border-radius:20px;background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.02));overflow:auto}
#beamCanvas{width:100%;height:auto;display:block}
.legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}
.legend-item{display:flex;align-items:center;gap:8px;color:var(--muted)}
.legend-item i{width:16px;height:16px;border-radius:4px;display:inline-block}
.c-top{background:var(--top)} .c-end{background:var(--end)} .c-mid{background:var(--mid)} .c-bottom{background:var(--bottom)} .c-stirrup{background:var(--stirrup)}
.table-scroller{overflow:auto}
.sticky-actions{position:sticky;bottom:18px;display:flex;justify-content:flex-end;margin-top:20px}
.empty-state{padding:36px;text-align:center}
.note-card pre{white-space:pre-wrap;overflow:auto;background:rgba(255,255,255,.04);padding:16px;border-radius:16px}
code{background:rgba(255,255,255,.06);padding:2px 6px;border-radius:8px}
.form-actions{display:flex;justify-content:flex-end;margin-top:18px}
.small-inline{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:14px}
.metric{padding:14px;border-radius:18px;background:rgba(255,255,255,.04)}
.metric strong{display:block;font-size:1.25rem;margin-top:5px}
.pill-type{padding:6px 10px;border-radius:999px;font-size:.82rem}
.pill-type.simple{background:rgba(59,130,246,.18);color:#bfdbfe}
.pill-type.continuous{background:rgba(34,197,94,.16);color:#bbf7d0}
.formula-block{font-size:.95rem;line-height:1.8}
.delete-btn{position:absolute;top:18px;right:18px}
@media (max-width:1180px){
  .workspace-grid{grid-template-columns:1fr}
}
@media (max-width:980px){
  .app-shell{display:block}
  .sidebar{position:relative;height:auto;width:auto}
  .main-content{padding:18px}
  .summary-grid,.summary-grid.compact,.metric-grid,.beam-grid,.form-grid.cols-3{grid-template-columns:1fr}
  .col-span-2,.col-span-3,.beam-grid .wide,.beam-grid .full{grid-column:span 1}
  .page-head{flex-direction:column;align-items:flex-start}
}

.cross-head{margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.cross-section-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:12px}
.cross-card{padding:14px;border-radius:20px;background:rgba(255,255,255,.04);border:1px solid var(--line);transition:.22s ease;position:relative;overflow:hidden}
.cross-card:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.2)}
.cross-card:before{content:'';position:absolute;inset:auto -30px -55px auto;width:110px;height:110px;background:radial-gradient(circle, rgba(37,99,235,.12), transparent 70%);pointer-events:none}
.cross-card h4{margin:0 0 4px;font-size:1rem}
.cross-card p{margin:0 0 10px;color:var(--muted);font-size:.88rem}
.cross-svg{width:100%;height:auto;display:block}
.cross-legend-mini{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.cross-legend-mini span{display:inline-flex;align-items:center;gap:6px;padding:6px 8px;border-radius:999px;background:rgba(255,255,255,.05);font-size:.78rem;color:#d8e6ff}
.cross-legend-mini i{width:10px;height:10px;border-radius:999px;display:inline-block}
.c-cont{background:#ec4899}
@media (max-width:980px){.cross-section-grid{grid-template-columns:1fr}}

.beam-grid .subhead{grid-column:1/-1;margin:8px 0 0;font-size:.9rem;font-weight:700;color:#dbe8ff;padding:8px 12px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid var(--line)}
.toolbar-inline{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.btn-ghost{background:rgba(255,255,255,.05);color:#dbe8ff;border:1px solid var(--line)}
.micro-note{font-size:.8rem;color:var(--muted)}
.hook-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;grid-column:1/-1}
.cross-svg text{font-family:Inter,system-ui,sans-serif}
.badge.alt{background:rgba(245,158,11,.12);color:#fde68a}
@media (max-width:980px){.hook-grid{grid-template-columns:1fr}}