:root{--bg:#f5f7fb;--card:#fff;--text:#172033;--muted:#6b7280;--primary:#2e268f;--primary2:#4a43c7;--line:#e5e7eb;--danger:#b42318;--success:#067647;--warn:#b54708}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.layout{display:grid;grid-template-columns:250px 1fr;min-height:100vh}.sidebar{background:#171a2b;color:#fff;padding:18px;position:sticky;top:0;height:100vh;overflow:auto}.brand{font-size:20px;font-weight:800;margin-bottom:18px}.brand small{display:block;font-size:11px;color:#aeb4c6;font-weight:500;margin-top:4px}.nav h4{font-size:11px;color:#8f96aa;text-transform:uppercase;letter-spacing:.08em;margin:18px 8px 8px}.nav a{display:block;padding:10px 11px;border-radius:9px;color:#dfe3ee;font-size:14px;margin:2px 0}.nav a:hover,.nav a.active{background:#2b2f47;color:#fff}.main{padding:22px}.topbar{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:20px}.topbar h1{font-size:24px;margin:0}.muted{color:var(--muted)}.btn{display:inline-flex;align-items:center;gap:7px;background:var(--primary);color:#fff;border:none;border-radius:9px;padding:10px 14px;cursor:pointer;font-weight:700}.btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}.btn.danger{background:var(--danger)}.grid{display:grid;gap:16px}.grid.kpi{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:0 1px 2px rgba(16,24,40,.03)}.kpi .label{font-size:13px;color:var(--muted)}.kpi .value{font-size:27px;font-weight:800;margin-top:6px}.kpi .sub{font-size:12px;margin-top:5px}.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:11px 10px;border-bottom:1px solid var(--line);text-align:left;font-size:13px;white-space:nowrap}.table th{font-size:12px;color:#475467;background:#f9fafb}.badge{display:inline-block;padding:5px 8px;border-radius:999px;font-size:11px;font-weight:700;background:#eef2ff;color:#3730a3}.badge.paid{background:#ecfdf3;color:#067647}.badge.overdue{background:#fef3f2;color:#b42318}.badge.draft{background:#f2f4f7;color:#344054}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field label{display:block;font-size:12px;font-weight:700;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;padding:10px 11px;border:1px solid #d0d5dd;border-radius:8px;background:#fff}.field textarea{min-height:90px}.span2{grid-column:1/-1}.alert{padding:12px 14px;border-radius:9px;margin-bottom:15px;background:#ecfdf3;color:#067647}.alert.error{background:#fef3f2;color:#b42318}.login-wrap{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#171a2b,#2e268f)}.login-card{width:min(470px,92vw);background:#fff;border-radius:18px;padding:28px}.login-card h1{margin:0 0 7px}.quick{display:flex;gap:8px;flex-wrap:wrap}.empty{padding:28px;text-align:center;color:var(--muted)}@media(max-width:1000px){.layout{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.grid.kpi{grid-template-columns:repeat(2,1fr)}.row{grid-template-columns:1fr}}@media(max-width:640px){.main{padding:14px}.grid.kpi,.form-grid{grid-template-columns:1fr}.span2{grid-column:auto}.topbar{align-items:flex-start;flex-direction:column}}