/* ===== Dark Mode ISP Billing Dashboard ===== */
:root {
    --bg: #0d1117;
    --panel: #161b22;
    --panel-light: #1c2129;
    --border: #2a2f3a;
    --text: #e6edf3;
    --text-dim: #8b949e;
    --accent: #2ea6ff;
    --accent-dim: #1b4f75;
    --green: #3fb950;
    --red: #f85149;
    --yellow: #d29922;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Login page ---- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-box {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    width: 340px;
}
.login-box h1 {
    font-size: 20px;
    margin-bottom: 4px;
}
.login-box p.sub {
    color: var(--text-dim);
    font-size: 13px;
    margin-top: 0;
    margin-bottom: 24px;
}
.login-box input {
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 14px;
    background: var(--panel-light);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
}
.login-box button {
    width: 100%;
    padding: 11px;
    background: var(--accent);
    border: none;
    border-radius: 6px;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    font-size: 14px;
}
.login-box button:hover { background: #1c8ce0; }
.error-msg {
    background: rgba(248,81,73,0.15);
    border: 1px solid var(--red);
    color: #ffb3ae;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 14px;
}

/* ---- Layout ---- */
.app {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 220px;
    background: var(--panel);
    border-right: 1px solid var(--border);
    padding: 20px 0;
    flex-shrink: 0;
}
.sidebar .brand {
    padding: 0 20px 20px 20px;
    font-weight: 700;
    font-size: 17px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 10px;
}
.sidebar .brand span { color: var(--accent); }
.sidebar nav a {
    display: block;
    padding: 11px 20px;
    color: var(--text-dim);
    font-size: 14px;
    border-left: 3px solid transparent;
}
.sidebar nav a:hover {
    background: var(--panel-light);
    color: var(--text);
    text-decoration: none;
}
.sidebar nav a.active {
    color: var(--text);
    border-left: 3px solid var(--accent);
    background: var(--panel-light);
}
.sidebar .logout {
    margin-top: 20px;
    border-top: 1px solid var(--border);
    padding-top: 10px;
}

.main {
    flex: 1;
    padding: 28px 34px;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 26px;
}
.topbar h1 { font-size: 22px; margin: 0; }
.topbar .who { color: var(--text-dim); font-size: 13px; }

/* ---- Cards ---- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}
.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
}
.card .label {
    color: var(--text-dim);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}
.card .value {
    font-size: 26px;
    font-weight: 700;
}
.card .value.green { color: var(--green); }
.card .value.blue { color: var(--accent); }
.card .value.yellow { color: var(--yellow); }

/* ---- Panels / Tables ---- */
.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    margin-bottom: 24px;
}
.panel h2 {
    font-size: 16px;
    margin-top: 0;
    margin-bottom: 16px;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}
th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}
th {
    color: var(--text-dim);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
}
tr:hover td { background: var(--panel-light); }

.badge {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}
.badge.online { background: rgba(63,185,80,0.15); color: var(--green); }
.badge.offline { background: rgba(139,148,158,0.15); color: var(--text-dim); }

/* ---- Forms ---- */
.form-row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.form-group { flex: 1; min-width: 160px; }
.form-group label {
    display: block;
    font-size: 12px;
    color: var(--text-dim);
    margin-bottom: 6px;
}
.form-group input, .form-group select {
    width: 100%;
    padding: 9px 11px;
    background: var(--panel-light);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
}
.btn {
    display: inline-block;
    padding: 10px 18px;
    background: var(--accent);
    border: none;
    border-radius: 6px;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    font-size: 14px;
}
.btn:hover { background: #1c8ce0; }
.btn.secondary {
    background: var(--panel-light);
    border: 1px solid var(--border);
    color: var(--text);
}
.btn.danger { background: var(--red); }

.success-msg {
    background: rgba(63,185,80,0.15);
    border: 1px solid var(--green);
    color: #b7f0c0;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 16px;
}

code {
    background: var(--panel-light);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12.5px;
}