:root{--bg:#f4f7fb;--card:#fff;--text:#172033;--muted:#64748b;--primary:#0f766e;--danger:#dc2626;--warn:#d97706;--line:#e2e8f0}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}.layout{display:flex;min-height:100vh}.sidebar{width:275px;background:#071b2d;color:white;padding:20px;position:fixed;inset:0 auto 0 0;overflow:auto}.brand{display:flex;gap:12px;align-items:center;margin-bottom:24px}.logo{width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,#10b981,#38bdf8);display:grid;place-items:center;font-weight:900}.brand small{display:block;color:#9fb2c8}.sidebar nav a{display:block;color:#dbeafe;text-decoration:none;padding:12px 14px;border-radius:12px;margin:5px 0}.sidebar nav a:hover{background:rgba(255,255,255,.12)}.main{margin-left:275px;width:calc(100% - 275px)}.topbar{padding:18px 26px;background:white;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:2}.topbar h2{margin:0}.topbar p{margin:4px 0 0;color:var(--muted)}.user-chip{background:#ecfeff;color:#155e75;padding:10px 14px;border-radius:999px;font-weight:700}.content{padding:24px}.grid{display:grid;grid-template-columns:repeat(4,minmax(160px,1fr));gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 10px 25px rgba(15,23,42,.05)}.card h3{margin:0 0 8px;font-size:14px;color:var(--muted)}.card .num{font-size:28px;font-weight:900}.two{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}.btn{border:0;border-radius:12px;padding:10px 14px;background:var(--primary);color:white;font-weight:700;cursor:pointer;text-decoration:none;display:inline-block}.btn.red{background:var(--danger)}.btn.gray{background:#334155}input,select,textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:12px;background:white}label{font-weight:700;font-size:13px;margin-bottom:6px;display:block}.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.table{width:100%;border-collapse:collapse;background:white;border-radius:16px;overflow:hidden}.table th,.table td{padding:12px;border-bottom:1px solid var(--line);text-align:left}.table th{background:#f8fafc}.alert{padding:12px;border-radius:14px;margin-bottom:14px}.alert.warn{background:#fff7ed;color:#9a3412}.alert.ok{background:#ecfdf5;color:#065f46}.pos{display:grid;grid-template-columns:1.4fr .9fr;gap:18px}.products{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.product{border:1px solid var(--line);border-radius:16px;padding:12px;background:white;cursor:pointer}.cart{background:white;border-radius:18px;padding:16px;border:1px solid var(--line)}.login-body{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 20% 10%,#14b8a6 0,transparent 25%),linear-gradient(135deg,#071b2d,#0f172a)}.login-card{width:min(430px,92vw);background:rgba(255,255,255,.96);border-radius:28px;padding:32px;box-shadow:0 25px 80px rgba(0,0,0,.35)}.login-card h1{margin:0 0 8px}.login-card p{color:var(--muted)}.dark{--bg:#0f172a;--card:#172033;--text:#e5e7eb;--line:#334155}.dark .topbar,.dark .table,.dark input,.dark select,.dark textarea{background:#172033;color:#e5e7eb}@media(max-width:900px){.sidebar{position:relative;width:100%;height:auto}.layout{display:block}.main{margin:0;width:100%}.grid,.two,.pos,.form-grid{grid-template-columns:1fr}.products{grid-template-columns:1fr 1fr}}
@media print{.sidebar,.topbar,.no-print{display:none}.main{margin:0;width:100%}.content{padding:0}.receipt{width:80mm;font-size:12px}.receipt h2{text-align:center}.receipt table{width:100%;font-size:11px}.receipt td{border-bottom:1px dashed #bbb;padding:4px}}