:root{--primary:#0f766e;--primary-dark:#115e59;--accent:#2563eb;--bg:#f4f7fb;--card:#fff;--text:#0f172a;--muted:#64748b;--border:#d9e2ef;--danger:#dc2626;--success:#16a34a;--warning:#d97706;--sidebar:#0f172a}*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}.app-shell{display:flex;min-height:100vh}.sidebar{width:270px;background:linear-gradient(180deg,#0f172a,#123a45);color:#fff;padding:20px;position:sticky;top:0;height:100vh;overflow:auto}.brand{display:flex;align-items:center;gap:12px;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.14);margin-bottom:14px}.brand img{width:58px;height:58px;background:white;border-radius:16px;object-fit:contain;padding:5px}.brand h2{margin:0;font-size:22px}.brand span{font-size:12px;color:#cbd5e1}.side-nav a{display:block;color:#dbeafe;text-decoration:none;padding:11px 13px;border-radius:12px;margin:5px 0;font-size:14px}.side-nav a:hover,.side-nav a.active{background:rgba(255,255,255,.12);color:#fff}.main-content{flex:1;min-width:0}.topbar{height:74px;background:white;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:5}.topbar span{display:block;color:var(--muted);font-size:13px;margin-top:3px}.user-chip{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:14px}.user-chip a{background:#fee2e2;color:#991b1b;text-decoration:none;padding:8px 11px;border-radius:10px;font-weight:700}.page-wrap{padding:24px;max-width:1450px;margin:0 auto}.page-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.page-title h1{margin:0;font-size:28px}.page-title p{margin:5px 0 0;color:var(--muted)}.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:20px;margin-bottom:18px;box-shadow:0 10px 28px rgba(15,23,42,.06)}.card h3{margin:0 0 16px;color:#0f3f46}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px}.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.form-grid.two{grid-template-columns:repeat(2,1fr)}label{display:block;font-weight:700;font-size:13px;margin-bottom:6px;color:#334155}input,select,textarea{width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:12px;background:#fff;font-size:14px;outline:none}textarea{min-height:92px}input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,118,110,.12)}input[readonly]{background:#f1f5f9;color:#0f766e;font-weight:800}.btn,button{background:var(--primary);color:white;border:0;padding:11px 16px;border-radius:12px;font-weight:800;text-decoration:none;cursor:pointer;display:inline-block}.btn:hover,button:hover{background:var(--primary-dark)}.btn.secondary{background:#334155}.btn.danger,.danger{background:var(--danger)}.msg{padding:12px 14px;background:#dcfce7;color:#166534;border:1px solid #bbf7d0;border-radius:12px;margin-bottom:14px}.error{padding:12px 14px;background:#fee2e2;color:#991b1b;border:1px solid #fecaca;border-radius:12px;margin-bottom:14px}.stat-card{background:linear-gradient(135deg,#fff,#f8fafc);border:1px solid var(--border);border-radius:18px;padding:18px;box-shadow:0 10px 25px rgba(15,23,42,.05)}.stat-label{color:var(--muted);font-size:13px;font-weight:700}.stat{font-size:32px;font-weight:900;margin-top:8px}.stat small{font-size:15px;color:var(--muted)}table{width:100%;border-collapse:collapse;background:white;border-radius:14px;overflow:hidden}th,td{padding:12px;border-bottom:1px solid var(--border);text-align:left;font-size:14px;vertical-align:top}th{background:#f8fafc;color:#334155}.badge{display:inline-block;padding:5px 10px;border-radius:999px;background:#e2e8f0;font-size:12px;font-weight:800}.badge.active{background:#dcfce7;color:#166534}.badge.unpaid{background:#fef3c7;color:#92400e}.badge.disconnected{background:#fee2e2;color:#991b1b}.badge.free{background:#dbeafe;color:#1e40af}.section-title{grid-column:1/-1;margin:10px 0 0;padding:11px 12px;background:#f8fafc;border:1px solid var(--border);border-radius:12px;font-weight:900;color:#0f3f46}.table-wrap{overflow:auto}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.chart-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0f766e,#0f172a);padding:20px}.login-card{width:100%;max-width:430px;background:#fff;border-radius:22px;padding:26px;box-shadow:0 20px 60px rgba(0,0,0,.22)}.login-card h1{margin:0 0 8px}.login-card p{color:var(--muted);margin-top:0}@media(max-width:1050px){.form-grid{grid-template-columns:repeat(2,1fr)}.chart-grid{grid-template-columns:1fr}.sidebar{width:230px}}@media(max-width:760px){.app-shell{display:block}.sidebar{height:auto;width:auto;position:relative}.topbar{height:auto;padding:14px;display:block}.user-chip{margin-top:8px}.page-wrap{padding:15px}.form-grid,.form-grid.two{grid-template-columns:1fr}.grid{grid-template-columns:1fr}.page-title{display:block}}

.btn-light{display:inline-block;padding:11px 14px;border-radius:10px;background:#e5e7eb;color:#111827;text-decoration:none;font-weight:700;border:0;white-space:nowrap}
.btn-light:hover{background:#d1d5db}