:root {
    color-scheme: light;
    --bg: #f4f7f8;
    --panel: #ffffff;
    --ink: #172026;
    --muted: #60717c;
    --line: #d9e1e5;
    --accent: #0f766e;
    --accent-2: #334155;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--ink);
}
a { color: var(--accent); }
.main {
    max-width: 1180px;
    margin: 0 auto;
    padding: 32px;
}
.with-sidebar {
    margin-left: 240px;
}
.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 240px;
    padding: 24px 18px;
    background: #14213d;
    color: #fff;
}
.sidebar .brand {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 22px;
}
.sidebar a {
    display: block;
    color: #e7eef7;
    text-decoration: none;
    padding: 11px 12px;
    border-radius: 6px;
}
.sidebar a:hover { background: rgba(255,255,255,.1); }
h1 { margin: 0 0 22px; font-size: 32px; }
h2 { margin: 0 0 14px; font-size: 20px; }
.panel, .login-box {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 22px;
    margin-bottom: 18px;
    box-shadow: 0 8px 22px rgba(15, 23, 42, .04);
}
.login-box {
    max-width: 420px;
    margin: 70px auto;
}
label {
    display: grid;
    gap: 7px;
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 14px;
}
input, textarea, select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 11px 12px;
    font: inherit;
    color: var(--ink);
    background: #fff;
}
textarea {
    font-family: Consolas, "Courier New", monospace;
    resize: vertical;
}
button, .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 10px 16px;
    border: 0;
    border-radius: 6px;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}
.button.small {
    min-height: 32px;
    padding: 7px 10px;
    font-size: 13px;
}
.inline-form {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: end;
}
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}
.metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}
.metric {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 20px;
    text-decoration: none;
    color: var(--ink);
}
.metric span {
    display: block;
    color: var(--muted);
    margin-bottom: 8px;
}
.metric strong {
    font-size: 30px;
}
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    text-align: left;
    padding: 12px 10px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}
th {
    color: var(--accent-2);
    font-size: 13px;
    text-transform: uppercase;
}
.flash {
    background: #ecfdf5;
    border: 1px solid #99f6e4;
    color: #115e59;
    border-radius: 8px;
    padding: 12px 14px;
    margin-bottom: 18px;
}
.hint {
    color: var(--muted);
    font-size: 14px;
}
code {
    background: #eef2f7;
    border-radius: 4px;
    padding: 3px 5px;
}
.qr-box {
    margin-top: 18px;
}
.qr-box img {
    width: 260px;
    max-width: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 12px;
    background: #fff;
}
@media (max-width: 800px) {
    .sidebar {
        position: static;
        width: auto;
    }
    .with-sidebar {
        margin-left: 0;
    }
    .main {
        padding: 18px;
    }
    .grid-2, .metrics, .inline-form {
        grid-template-columns: 1fr;
    }
}