/* HostMon Dashboard - dark-first ops theme, responsive, no deps */

:root {
    --bg: #0d1117;
    --bg-card: #161b22;
    --bg-input: #0d1117;
    --border: #21262d;
    --border-focus: #388bfd;
    --text: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #484f58;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --green: #3fb950;
    --amber: #d29922;
    --red: #f85149;
    --cpu: #f0883e;
    --mem: #58a6ff;
    --disk: #a371f7;
    --radius: 8px;
    --radius-sm: 4px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f6f8fa;
        --bg-card: #ffffff;
        --bg-input: #ffffff;
        --border: #d0d7de;
        --border-focus: #0969da;
        --text: #1f2328;
        --text-secondary: #656d76;
        --text-muted: #8b949e;
        --accent: #0969da;
        --accent-hover: #0550ae;
        --green: #1a7f37;
        --amber: #9a6700;
        --red: #cf222e;
        --cpu: #bc4c00;
        --mem: #0969da;
        --disk: #8250df;
    }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100dvh;
}

/* ---- Login ---- */
.login-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100dvh;
    padding: 16px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    width: 100%;
    max-width: 340px;
    text-align: center;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    margin: 4px 0 24px;
}

.login-card input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.875rem;
    margin-bottom: 16px;
    outline: none;
    transition: border-color 0.15s;
}
.login-card input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(56, 139, 253, 0.15);
}

.login-error {
    color: var(--red);
    font-size: 0.8125rem;
    margin-top: 12px;
}

/* ---- Buttons ---- */
.btn-primary {
    width: 100%;
    padding: 10px 16px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
    padding: 6px 12px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-secondary); }

/* ---- Header ---- */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 10;
}

.header-left { display: flex; align-items: baseline; gap: 12px; }

.header-title {
    font-size: 1.0625rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.refresh-info {
    font-size: 0.6875rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ---- Host Grid ---- */
.host-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

/* ---- Host Card ---- */
.host-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    transition: border-color 0.15s;
}
.host-card:hover { border-color: var(--text-muted); }

.host-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.host-name {
    font-weight: 600;
    font-size: 0.9375rem;
}

.host-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-delete-host {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}
.btn-delete-host:hover {
    color: var(--red);
    background: rgba(248, 81, 73, 0.15);
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.6875rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}
.status-dot.online  { background: var(--green); box-shadow: 0 0 6px var(--green); }
.status-dot.warn    { background: var(--amber); }
.status-dot.offline { background: var(--red); }
.status-dot.no-data { background: var(--text-muted); }

/* ---- Metric Row ---- */
.metric { margin-bottom: 12px; }

.metric-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 2px;
}

.metric-label {
    font-size: 0.6875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-family: var(--font-mono);
}

.metric-value {
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.sparkline {
    display: block;
    width: 100%;
    height: 28px;
    margin-top: 2px;
}

.usage-bar {
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 4px;
}

.usage-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.6s ease;
}

/* ---- Info Row ---- */
.info-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-muted);
    padding: 60px 20px;
}

.hidden { display: none !important; }

/* ---- Modal & Tabs ---- */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 850px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-title-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.modal-header h2 {
    font-size: 1.125rem;
    font-weight: 700;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: color 0.15s;
}
.modal-close:hover { color: var(--text); }

.modal-tabs {
    display: flex;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0 12px;
    gap: 4px;
    overflow-x: auto;
}

.tab-btn {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    padding: 10px 14px;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
    white-space: nowrap;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.modal-body {
    padding: 16px 20px;
    overflow-y: auto;
    flex: 1;
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

.tab-toolbar {
    margin-bottom: 12px;
}

.search-input {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.8125rem;
    outline: none;
}
.search-input:focus { border-color: var(--border-focus); }

.table-container {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    text-align: left;
}

.data-table th {
    background: var(--bg);
    color: var(--text-secondary);
    padding: 8px 12px;
    font-family: var(--font-mono);
    font-weight: 600;
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
}
.data-table tr:last-child td { border-bottom: none; }

.empty-cell {
    text-align: center;
    color: var(--text-muted);
    padding: 24px !important;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 12px;
}

.detail-item-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
}

.detail-item-title {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 4px;
}

.detail-item-sub {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    word-break: break-all;
}