/* Quantum Loom Dashboard — dark institutional theme */
:root {
    --bg: #0d1117;
    --surface: #161b22;
    --surface-hover: #1c2128;
    --border: #30363d;
    --text: #e6edf3;
    --text-muted: #7d8590;
    --accent: #58a6ff;
    --green: #3fb950;
    --red: #f85149;
    --yellow: #d29922;
    --sidebar-w: 220px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background: var(--bg); color: var(--text);
    font-family: -apple-system, 'Segoe UI', system-ui, sans-serif;
    font-size: 14px; overflow: hidden;
}
.hidden { display: none !important; }

/* ─── Login ─── */
.login-container {
    display: flex; align-items: center; justify-content: center;
    height: 100vh; background: var(--bg);
}
.login-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 40px; width: 380px; text-align: center;
}
.login-card h1 { font-size: 28px; color: var(--accent); margin-bottom: 4px; }
.subtitle { color: var(--text-muted); margin-bottom: 28px; font-size: 13px; }
.login-card form { display: flex; flex-direction: column; gap: 12px; }
.login-card input {
    padding: 12px 16px; background: var(--bg); border: 1px solid var(--border);
    border-radius: 8px; color: var(--text); font-size: 14px;
}
.login-card input:focus { border-color: var(--accent); outline: none; }
.login-card button {
    padding: 12px; background: var(--accent); color: var(--bg);
    border: none; border-radius: 8px; font-weight: 600; cursor: pointer;
    font-size: 14px; transition: 0.15s;
}
.login-card button:hover { background: #79b8ff; }
.error { color: var(--red); font-size: 13px; min-height: 18px; }

/* ─── Layout ─── */
#dashView { display: flex; height: 100vh; }
.sidebar {
    width: var(--sidebar-w); background: var(--surface);
    border-right: 1px solid var(--border); display: flex;
    flex-direction: column; flex-shrink: 0;
}
.sidebar-header {
    padding: 20px 16px; border-bottom: 1px solid var(--border);
    display: flex; align-items: center; gap: 10px;
}
.sidebar-header h2 {
    background: var(--accent); color: var(--bg); width: 36px; height: 36px;
    border-radius: 8px; display: flex; align-items: center; justify-content: center;
    font-size: 16px; font-weight: 800;
}
.sidebar-header span { font-size: 15px; font-weight: 600; }
nav { flex: 1; padding: 12px 8px; overflow-y: auto; }
.nav-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 12px;
    color: var(--text-muted); text-decoration: none; border-radius: 8px;
    font-size: 13px; margin-bottom: 2px; transition: 0.1s;
}
.nav-item:hover { background: var(--surface-hover); color: var(--text); }
.nav-item.active { background: var(--accent); color: var(--bg); font-weight: 600; }
.nav-icon { font-size: 16px; }
.sidebar-footer {
    padding: 12px 16px; border-top: 1px solid var(--border);
    display: flex; flex-direction: column; gap: 8px;
}
.sidebar-footer span { color: var(--text-muted); font-size: 12px; }
.logout-btn {
    background: none; border: 1px solid var(--border); color: var(--text-muted);
    padding: 6px; border-radius: 6px; cursor: pointer; font-size: 12px;
}
.logout-btn:hover { border-color: var(--red); color: var(--red); }

/* ─── Content ─── */
.content { flex: 1; overflow-y: auto; padding: 32px; }
.tab-content { display: none; max-width: 1100px; }
.tab-content.active { display: block; }
.tab-content h1 { font-size: 24px; margin-bottom: 24px; }

/* ─── Cards ─── */
.card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 24px; margin-bottom: 20px;
}
.card h3 { font-size: 16px; margin-bottom: 16px; color: var(--text); }

/* ─── Tables ─── */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--text-muted); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: 0.5px; }
tbody tr:hover { background: var(--surface-hover); }
.empty-row { text-align: center; color: var(--text-muted); padding: 24px; }
.status-completed { color: var(--green); }
.status-processing { color: var(--yellow); }
.status-failed { color: var(--red); }
.status-placeholder { color: var(--text-muted); }

/* ─── Upload ─── */
.upload-zone {
    border: 2px dashed var(--border); border-radius: 12px; padding: 40px;
    text-align: center; color: var(--text-muted); cursor: pointer; transition: 0.15s;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent); color: var(--accent); background: rgba(88,166,255,0.05);
}
.upload-zone p { font-size: 15px; }
.upload-meta { display: flex; gap: 12px; margin-top: 16px; align-items: center; }
.upload-meta input, .upload-meta select {
    padding: 10px 12px; background: var(--bg); border: 1px solid var(--border);
    border-radius: 8px; color: var(--text); font-size: 13px;
}
.upload-meta button {
    padding: 10px 20px; background: var(--accent); color: var(--bg);
    border: none; border-radius: 8px; font-weight: 600; cursor: pointer;
}
.upload-meta button:disabled { opacity: 0.4; cursor: not-allowed; }
#uploadProgress { margin-top: 16px; }
.progress-bar { height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); width: 30%; animation: pulse 1.5s infinite; }
@keyframes pulse { 0%, 100% { width: 30%; } 50% { width: 70%; } }
.progress-text { color: var(--text-muted); font-size: 12px; margin-top: 6px; display: block; }

/* ─── Placeholders ─── */
.placeholder-card { text-align: center; }
.placeholder-icon { font-size: 48px; margin-bottom: 12px; opacity: 0.3; }
.placeholder-card p { color: var(--text-muted); margin-bottom: 20px; }
.placeholder-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px; margin-bottom: 20px; text-align: left;
}
.placeholder-field { display: flex; flex-direction: column; gap: 4px; }
.placeholder-field label { font-size: 12px; color: var(--text-muted); }
.placeholder-field input, .placeholder-field select {
    padding: 8px; background: var(--bg); border: 1px solid var(--border);
    border-radius: 6px; color: var(--text); font-size: 13px;
}
.btn-disabled { opacity: 0.4; cursor: not-allowed; padding: 10px 20px;
    background: var(--accent); color: var(--bg); border: none; border-radius: 8px; font-weight: 600; }
.placeholder-chart {
    height: 200px; background: var(--bg); border: 1px solid var(--border);
    border-radius: 8px; display: flex; align-items: center; justify-content: center;
    color: var(--text-muted); font-size: 13px;
}

/* ─── Metrics ─── */
.metrics-row { display: flex; gap: 16px; margin-bottom: 24px; }
.metric-card {
    flex: 1; background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 20px; text-align: center;
}
.metric-label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.metric-value { display: block; font-size: 28px; font-weight: 700; color: var(--accent); }

/* ─── Chart ─── */
.chart-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    align-items: center;
    flex-wrap: wrap;
}
.chart-controls select,
.chart-controls button {
    padding: 10px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 13px;
}
.chart-controls button {
    background: var(--accent);
    color: var(--bg);
    border: none;
    font-weight: 600;
    cursor: pointer;
}
.chart-controls button:hover { background: #79b8ff; }
#chartContainer {
    width: 100%;
    height: 500px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
}