:root{--bg:#f5f7fb;--card:#fff;--text:#172033;--muted:#6d7890;--brand:#0f172a;--accent:#f97316;--line:#e7ebf3;--green:#16a34a;--red:#dc2626}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.app{display:flex;min-height:100vh}.sidebar{width:270px;background:linear-gradient(180deg,#0f172a,#111827);color:#fff;padding:22px;position:fixed;top:0;bottom:0;overflow:auto}.brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}.brand small{display:block;color:#b8c1d6;margin-top:3px}.logo{width:46px;height:46px;border-radius:14px;background:var(--accent);display:grid;place-items:center;font-weight:900;font-size:24px}.sidebar nav{display:grid;gap:7px}.sidebar a{padding:11px 12px;border-radius:12px;color:#dbe4ff}.sidebar a:hover,.sidebar a.active{background:rgba(255,255,255,.11);color:#fff}.logout{margin-top:12px;background:#991b1b!important}.main{margin-left:270px;padding:24px;width:calc(100% - 270px)}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.top h2{margin:0;font-size:28px}.top p{margin:5px 0 0;color:var(--muted)}.pill{background:#fff;border:1px solid var(--line);border-radius:999px;padding:10px 14px}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 10px 25px rgba(15,23,42,.05)}.stat h3{margin:0;color:var(--muted);font-size:14px}.stat b{font-size:28px;display:block;margin-top:8px}.stat span{color:var(--accent);font-size:13px}.two{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;margin-top:16px}.table{width:100%;border-collapse:collapse}.table th,.table td{border-bottom:1px solid var(--line);padding:12px;text-align:left;font-size:14px}.table th{color:var(--muted);font-size:12px;text-transform:uppercase}.btn{border:0;background:var(--brand);color:#fff;border-radius:10px;padding:10px 13px;cursor:pointer;display:inline-block}.btn.orange{background:var(--accent)}.btn.green{background:var(--green)}.btn.red{background:var(--red)}.btn.light{background:#eef2ff;color:#111827}form .row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:12px}label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}input,select,textarea{width:100%;padding:11px;border:1px solid var(--line);border-radius:12px;background:#fff}textarea{min-height:90px}.actions{display:flex;gap:8px;flex-wrap:wrap}.alert{padding:12px 14px;border-radius:12px;margin-bottom:14px}.ok{background:#dcfce7;color:#166534}.err{background:#fee2e2;color:#991b1b}.badge{padding:5px 9px;border-radius:999px;font-size:12px;background:#eef2ff}.badge.due{background:#fee2e2;color:#991b1b}.badge.paid{background:#dcfce7;color:#166534}.receipt{max-width:310px;background:#fff;padding:12px;color:#000;font-family:Arial}.center{text-align:center}.print-only{display:none}@media(max-width:900px){.sidebar{position:static;width:100%;height:auto}.app{display:block}.main{margin-left:0;width:100%}.grid{grid-template-columns:repeat(2,1fr)}.two,form .row{grid-template-columns:1fr}}@media(max-width:520px){.grid{grid-template-columns:1fr}.top{display:block}}@media print{body *{visibility:hidden}.print-area,.print-area *{visibility:visible}.print-area{position:absolute;left:0;top:0}.no-print{display:none!important}}