:root{
  --bg:#f3f6fb;
  --surface:#ffffff;
  --ink:#111827;
  --muted:#64748b;
  --border:#e5e7eb;
  --primary:#0f766e;
  --primary-dark:#115e59;
  --danger:#b91c1c;
  --success:#166534;
  --info:#1d4ed8;
  --shadow:0 12px 30px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}
body{margin:0;min-height:100vh;background:var(--bg)}
a{text-decoration:none;color:inherit}
button,input{font:inherit}
.auth-body{display:grid;place-items:center;padding:24px;background:linear-gradient(160deg,#0b1220,#111827 48%,#1f2937)}
.auth-card{width:min(100%,440px);background:var(--surface);padding:26px;border-radius:24px;box-shadow:0 24px 60px rgba(0,0,0,.28)}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.brand img{width:52px;height:52px;border-radius:15px}
.brand strong{display:block;font-size:1.05rem}
.brand span{display:block;color:var(--muted);font-size:.86rem;margin-top:2px}
.brand.compact{margin:0}
.brand.compact img{width:42px;height:42px;border-radius:12px}
h1{font-size:1.7rem;margin:0 0 8px}
h2{font-size:1.22rem;margin:0}
h3{font-size:1rem;margin:12px 0 0}
p{line-height:1.5}
.muted{color:var(--muted);margin:0 0 20px}
.stack{display:grid;gap:14px}
label{display:grid;gap:7px;font-weight:700;font-size:.9rem}
input{width:100%;border:1px solid var(--border);border-radius:12px;padding:12px 13px;background:#fff;outline:none}
input:focus{border-color:#14b8a6;box-shadow:0 0 0 3px rgba(20,184,166,.12)}
.btn{display:inline-flex;justify-content:center;align-items:center;border:0;border-radius:12px;padding:12px 16px;font-weight:800;cursor:pointer}
.btn.primary{background:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-dark)}
.btn.secondary{background:#e2e8f0;color:#0f172a}
.btn.ghost{background:transparent;border:1px solid #cbd5e1}
.btn.small{padding:8px 12px;border-radius:10px;font-size:.86rem}
.hidden{display:none!important}
.alert{padding:12px 14px;border-radius:12px;margin:0 0 16px;font-weight:700}
.alert.success{background:#dcfce7;color:var(--success)}
.alert.error{background:#fee2e2;color:var(--danger)}
.alert.info{background:#dbeafe;color:var(--info)}
.topbar{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:12px;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:12px max(16px,calc((100vw - 1120px)/2))}
.top-actions{display:flex;gap:8px}
.container{width:min(1120px,calc(100% - 28px));margin:22px auto 50px}
.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:18px}
.summary-card{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
.summary-card span{display:block;color:var(--muted);font-size:.83rem;font-weight:800;text-transform:uppercase;letter-spacing:.04em}
.summary-card strong{display:block;font-size:1.7rem;margin:7px 0 2px}
.summary-card small{color:var(--muted)}
.summary-card.emphasis{background:#111827;color:#fff;border-color:#111827}
.summary-card.emphasis span,.summary-card.emphasis small{color:#cbd5e1}
.card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:20px;margin:18px 0;box-shadow:var(--shadow)}
.section-title{display:flex;justify-content:space-between;gap:12px;margin-bottom:18px}
.section-title p{margin:5px 0 0;color:var(--muted);font-size:.9rem}
.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.form-grid .wide{grid-column:1/-1}
.calc-preview{border-radius:14px;padding:14px 16px;background:#f8fafc;border:1px dashed #cbd5e1}
.calc-preview span,.calc-preview small{display:block;color:var(--muted)}
.calc-preview strong{display:block;font-size:1.25rem;margin:3px 0}
.settings summary{font-weight:800;cursor:pointer}
.inline-form{display:flex;align-items:end;gap:12px;margin-top:16px}
.inline-form label{flex:1}
.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:14px}
table{width:100%;border-collapse:collapse;min-width:780px}
th,td{padding:12px 13px;text-align:left;border-bottom:1px solid var(--border);font-size:.9rem}
th{background:#f8fafc;color:#475569;font-size:.78rem;text-transform:uppercase;letter-spacing:.03em}
tr:last-child td{border-bottom:0}
.due{font-weight:800;color:#b45309}
.credit{font-weight:800;color:#166534}
.icon-btn{border:0;background:transparent;cursor:pointer;font-size:1rem}
.empty{text-align:center;color:var(--muted);padding:25px}
.footer-note{text-align:center;color:var(--muted);font-size:.82rem}
@media(max-width:820px){
  .summary-grid{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .container{width:min(100% - 18px,1120px);margin-top:12px}
  .topbar{padding:10px}
  .brand.compact span{max-width:170px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .summary-grid{gap:9px}
  .summary-card{padding:14px;border-radius:16px}
  .summary-card strong{font-size:1.35rem}
  .card{padding:15px;border-radius:17px}
  .form-grid{grid-template-columns:1fr}
  .form-grid .wide{grid-column:auto}
  .inline-form{display:grid}
}