/* ── Reset & base ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    background: #0d1117;
    color: #c9d1d9;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    padding: 24px 32px;
    min-height: 100vh;
}
a { color: #58a6ff; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ──────────────────────────────────────────────────────────────── */
header { margin-bottom: 28px; display: flex; justify-content: space-between; align-items: flex-start; }
header div { flex: 1; }
header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #58a6ff;
    letter-spacing: -0.01em;
}
header p {
    font-size: 0.8rem;
    color: #6e7681;
    margin-top: 4px;
}

/* ── Nav ─────────────────────────────────────────────────────────────────── */
nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 2px;
}
nav a {
    font-size: 0.8rem;
    color: #8b949e;
    text-decoration: none;
    border: 1px solid #30363d;
    padding: 5px 12px;
    border-radius: 6px;
    white-space: nowrap;
}
nav a:hover { border-color: #58a6ff; color: #58a6ff; text-decoration: none; }
nav a.active { border-color: #58a6ff; color: #58a6ff; }

/* ── Flash messages ──────────────────────────────────────────────────────── */
.error {
    background: #2d1b1b;
    border: 1px solid #5a2020;
    color: #f85149;
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 0.85rem;
}
.success {
    background: #1b2d1b;
    border: 1px solid #205a20;
    color: #3fb950;
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 0.85rem;
}
.warning {
    background: #2d2b1b;
    border: 1px solid #5a5020;
    color: #f0c040;
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 0.85rem;
}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.cards {
    display: flex;
    gap: 14px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.card {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 10px;
    padding: 16px 22px 14px;
    min-width: 150px;
}
.card-label {
    font-size: 0.7rem;
    color: #8b949e;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}
.card-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: #58a6ff;
    line-height: 1;
}
.card-value.green  { color: #3fb950; }
.card-value.orange { color: #f97316; }
.card-unit {
    font-size: 0.72rem;
    color: #6e7681;
    margin-top: 4px;
}

/* ── Sections ────────────────────────────────────────────────────────────── */
.section {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 10px;
    padding: 20px 24px;
    margin-bottom: 24px;
}
.section h2 {
    font-size: 0.78rem;
    color: #8b949e;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 18px;
}
.no-data {
    text-align: center;
    color: #6e7681;
    padding: 32px 0;
    font-size: 0.875rem;
}

/* ── Tables ──────────────────────────────────────────────────────────────── */
table {
    width: 100%;
    border-collapse: collapse;
}
th {
    text-align: left;
    padding: 8px 14px;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #6e7681;
    border-bottom: 1px solid #30363d;
}
td {
    padding: 7px 14px;
    font-size: 0.85rem;
    border-bottom: 1px solid #21262d;
    font-variant-numeric: tabular-nums;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: #1c2129; }

/* ── Range bar / pill buttons ────────────────────────────────────────────── */
.range-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.range-bar a, .range-bar button {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid #30363d;
    background: #161b22;
    color: #8b949e;
    cursor: pointer;
    transition: border-color 0.15s;
}
.range-bar a:hover, .range-bar button:hover {
    border-color: #58a6ff;
    text-decoration: none;
}
.range-bar a.active, .range-bar button.active {
    background: #58a6ff;
    border-color: #58a6ff;
    color: #fff;
}

/* ── Forms ───────────────────────────────────────────────────────────────── */
.form-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}
.form-row label {
    font-size: 0.85rem;
    color: #8b949e;
    min-width: 180px;
    flex-shrink: 0;
}
.form-row input[type="text"],
.form-row input[type="number"],
.form-row input[type="password"],
.form-row input[type="email"],
.form-row select {
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #c9d1d9;
    padding: 6px 12px;
    font-size: 0.85rem;
    width: 260px;
}
.form-row input:focus, .form-row select:focus {
    outline: none;
    border-color: #58a6ff;
}
td input[type="text"] {
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 4px;
    color: #c9d1d9;
    padding: 4px 8px;
    font-size: 0.82rem;
    width: 100%;
}
td input:focus {
    outline: none;
    border-color: #58a6ff;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
    background: #238636;
    color: #fff;
    border: 1px solid #2ea043;
    border-radius: 6px;
    padding: 6px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
}
.btn:hover { background: #2ea043; }
.btn-sm {
    background: #238636;
    color: #fff;
    border: 1px solid #2ea043;
    border-radius: 4px;
    padding: 3px 12px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
}
.btn-sm:hover { background: #2ea043; }
.btn-danger {
    background: #da3633;
    border-color: #f85149;
}
.btn-danger:hover { background: #f85149; }
.btn-sm.btn-danger {
    background: #da3633;
    border-color: #f85149;
}
.btn-sm.btn-danger:hover { background: #f85149; }

/* ── Auth forms (login, register, etc.) ──────────────────────────────────── */
.auth-form {
    max-width: 400px;
    margin: 60px auto 0;
}
.auth-form .section { padding: 28px 32px; }
.auth-form .form-row {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
}
.auth-form .form-row label { min-width: auto; }
.auth-form .form-row input { width: 100%; }
.auth-form .btn { width: 100%; margin-top: 8px; }
.auth-form p {
    text-align: center;
    font-size: 0.85rem;
    color: #8b949e;
    margin-top: 16px;
}

/* ── Status badges ───────────────────────────────────────────────────────── */
.status-online  { color: #3fb950; font-weight: 600; }
.status-offline { color: #f97316; font-weight: 600; }

/* ── Device select ───────────────────────────────────────────────────────── */
.device-select {
    background: #161b22;
    color: #c9d1d9;
    border: 1px solid #30363d;
    border-radius: 20px;
    padding: 6px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
}

/* ── Toggle switch ───────────────────────────────────────────────────────── */
.toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    color: #8b949e;
}

/* ── Chart ───────────────────────────────────────────────────────────────── */
canvas { max-height: 280px; }