:root{--brand-primary:#007748;--brand-primary-dark:#005c38;--brand-accent:#00adee;--brand-accent-dark:#0099d4;--bg:#f5f5f5;--card-bg:#fff;--text:#000;--text-muted:#555;--border:#ccc;--shadow:0 2px 8px rgba(0,0,0,.1);--shadow-sm:0 2px 4px rgba(0,0,0,.08)}*{box-sizing:border-box}.test-biller-banner{background:#fde047;color:#713f12;font-weight:600;text-align:center;padding:8px 16px;font-size:14px;border-bottom:2px solid #ca8a04;letter-spacing:.02em}body{font-family:Arial,sans-serif;background:var(--bg);color:var(--text);margin:0;min-height:100vh}a{color:var(--brand-accent);text-decoration:none}a:hover{text-decoration:underline}.site-header{background:var(--card-bg);border-bottom:3px solid var(--brand-primary);padding:.75rem 2rem;display:flex;justify-content:space-between;align-items:center}.site-header .logo{color:var(--brand-primary);font-size:1.5rem;font-weight:700}.site-header .logo,.site-header .logo:hover{text-decoration:none}.site-header nav{display:flex;gap:1.5rem;align-items:center}.site-header nav a{color:var(--text-muted);font-size:.9rem}.site-header nav a.active,.site-header nav a:hover{color:var(--brand-primary)}.site-header nav a.active{font-weight:700}.site-header nav .sign-out{color:var(--brand-accent);background:none;border:1px solid var(--brand-accent);padding:.35rem .75rem;border-radius:4px;font-size:.85rem;cursor:pointer;text-decoration:none}.site-header nav .sign-out:hover{background:var(--brand-accent);color:#fff;text-decoration:none}.page-content{max-width:960px;margin:0 auto;padding:2rem}.page-title{color:var(--brand-primary);font-size:1.25rem;margin:0 0 1.5rem}.card{display:block;background:var(--card-bg);color:var(--text);border-radius:8px;box-shadow:var(--shadow-sm);padding:1.25rem;margin-bottom:1rem}a.card:hover{text-decoration:none}.card-accent{border-left:4px solid var(--brand-accent)}.login-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center}.login-card{background:var(--card-bg);border-radius:8px;box-shadow:var(--shadow);max-width:400px;width:100%;padding:2rem}.login-card .logo{color:var(--brand-primary);font-size:1.5rem;font-weight:700;margin-bottom:1.5rem}.login-card h1{color:var(--brand-primary);font-size:1.25rem;margin:0 0 1rem}.login-card label{display:block;margin-bottom:.25rem;font-size:.9rem}.login-card input{border:1px solid var(--border);padding:.6rem;width:100%;margin:.25rem 0 1rem;border-radius:4px;font-size:1rem}.login-card button{background:var(--brand-accent);color:#fff;border:none;padding:.6rem 1.5rem;border-radius:4px;cursor:pointer;font-size:1rem;width:100%}.login-card button:hover{background:var(--brand-accent-dark)}.login-card button:disabled{opacity:.6;cursor:not-allowed}.login-error{color:#c00;font-size:.9rem;margin-top:.5rem}.homepage{min-height:100vh;display:flex;flex-direction:column}.hero{background:linear-gradient(135deg,var(--brand-primary),var(--brand-primary-dark));color:#fff;padding:4rem 2rem;text-align:center}.hero h1{font-size:2rem;margin:0 0 1rem}.hero p{font-size:1.1rem;margin:0 0 2rem;opacity:.9}.hero .cta-button{display:inline-block;background:var(--brand-accent);color:#fff;padding:.75rem 2rem;border-radius:4px;font-size:1rem;font-weight:700;text-decoration:none}.hero .cta-button:hover{background:var(--brand-accent-dark);text-decoration:none}.account-item strong{display:block;margin-bottom:.5rem}.account-item span{color:var(--text-muted);font-size:.9rem}.account-balance{margin-top:.75rem;padding-top:.75rem;border-top:1px solid #eee;display:flex;justify-content:space-between;font-size:.9rem}.account-balance .amount{font-weight:700;color:var(--brand-primary);font-size:1.1rem}.bill-summary{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.bill-info strong{display:block;margin-bottom:.25rem}.bill-info span{color:var(--text-muted);font-size:.9rem}.bill-amount{font-size:1.5rem;font-weight:700;color:var(--brand-primary)}.bill-actions{display:flex;gap:.75rem;margin-top:1rem}.bill-actions a,.bill-actions button{padding:.5rem 1rem;border-radius:4px;font-size:.9rem;text-decoration:none;cursor:pointer}.btn-primary{background:var(--brand-accent);color:#fff;border:none}.btn-primary:hover{background:var(--brand-accent-dark);text-decoration:none}.btn-secondary{background:none;color:var(--brand-accent);border:1px solid var(--brand-accent)}.btn-secondary:hover{background:var(--brand-accent);color:#fff;text-decoration:none}.bill-pdf{margin-top:1.5rem;border:1px solid #ddd;border-radius:4px;overflow:hidden}.bill-pdf iframe{width:100%;height:600px;border:none}.bill-detail{margin-top:1rem;font-size:.9rem}.bill-detail-row{display:flex;justify-content:space-between;padding:.4rem 0;border-bottom:1px solid #f0f0f0}.bill-detail-row.total{font-weight:700;border-top:2px solid var(--brand-primary);border-bottom:none;padding-top:.6rem;margin-top:.25rem}.history-table{width:100%;border-collapse:collapse;background:var(--card-bg);border-radius:8px;overflow:hidden;box-shadow:var(--shadow-sm)}.history-table th{background:var(--brand-primary);color:#fff;text-align:left;padding:.75rem 1rem;font-size:.85rem;text-transform:uppercase;letter-spacing:.03em}.history-table td{padding:.75rem 1rem;border-bottom:1px solid #f0f0f0;font-size:.9rem}.history-table tr:last-child td{border-bottom:none}.history-table tr:hover td{background:#f9f9f9}.status-due{color:#c00;font-weight:700}.status-paid{color:var(--brand-primary)}.site-footer{text-align:center;padding:2rem;color:var(--text-muted);font-size:.8rem;margin-top:auto}