:root{color:#102033;background:#f4f7fb;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,select{font:inherit}button{border:1px solid #cbd5e1;border-radius:8px;background:#fff;padding:10px 14px;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.6}.primary,form button[type=submit]{background:#0f766e;color:#fff;border-color:#0f766e;font-weight:700}.app-header{background:#0f172a;color:#fff;display:flex;justify-content:space-between;gap:20px;padding:18px clamp(16px,4vw,42px)}.app-header h1{margin:0;font-size:clamp(1.2rem,2vw,1.65rem)}.app-header p{margin:4px 0 0;color:#cbd5e1}.session-box{align-items:flex-end;display:flex;flex-direction:column;gap:6px}.layout,.login-panel{display:grid;gap:18px;margin:0 auto;max-width:1180px;padding:22px}.layout{grid-template-columns:minmax(0,1.4fr) minmax(300px,.8fr)}.card{background:#fff;border:1px solid #d8e0ea;border-radius:10px;box-shadow:0 8px 22px #0f172a0f;padding:18px}.form-grid,.secondary-form{border-top:1px solid #e2e8f0;margin-top:18px;padding-top:18px}.sale-entry{display:grid;gap:12px}.secondary-form{border-top:1px solid #e2e8f0;margin-top:18px;padding-top:18px}.sale-entry{grid-template-columns:minmax(220px,1fr) 120px auto;align-items:end}label{display:grid;gap:6px;font-size:.9rem;font-weight:700}input,select{border:1px solid #cbd5e1;border-radius:8px;padding:10px;width:100%}.table-wrap{margin-top:16px;overflow-x:auto}table{border-collapse:collapse;width:100%}th,td{border-bottom:1px solid #e2e8f0;padding:10px;text-align:left}.sale-total{align-items:center;display:flex;justify-content:space-between;margin:18px 0;padding:14px;border-radius:8px;background:#f8fafc}.sale-total strong{font-size:1.7rem}.toast{bottom:18px;left:50%;transform:translate(-50%);position:fixed;background:#0f172a;color:#fff;padding:12px 16px;border-radius:8px}@media (max-width: 760px){.app-header,.layout,.secondary-form{border-top:1px solid #e2e8f0;margin-top:18px;padding-top:18px}.sale-entry{grid-template-columns:1fr}.app-header{display:grid}}