/* ============================================
   Household Internet Monitor — Stylesheet
   Dark theme, modern dashboard look
   ============================================ */

:root {
    --bg-primary: #0b1120;
    --bg-card: #111827;
    --bg-card-hover: #1a2235;
    --bg-input: #1e293b;
    --border: #1e293b;
    --border-light: #2d3a4f;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --blue: #3b82f6;
    --blue-light: #60a5fa;
    --purple: #8b5cf6;
    --green: #10b981;
    --amber: #f59e0b;
    --red: #ef4444;
    --cyan: #06b6d4;
    --pink: #ec4899;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* --- HEADER --- */
.header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}
.header-left { display: flex; align-items: center; gap: 12px; }
.logo-icon { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; background: rgba(59,130,246,0.1); border-radius: 10px; }
.header h1 { font-size: 18px; font-weight: 700; letter-spacing: -0.3px; }
.header .subtitle { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.header-right { display: flex; align-items: center; gap: 16px; }
.last-update { font-size: 12px; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.btn-refresh {
    background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2);
    color: var(--blue-light); border-radius: 8px; padding: 8px; cursor: pointer;
    display: flex; align-items: center; transition: all 0.2s;
}
.btn-refresh:hover { background: rgba(59,130,246,0.2); }

/* --- MAIN --- */
.main { max-width: 1400px; margin: 0 auto; padding: 24px; }

/* --- SUMMARY CARDS --- */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-bottom: 24px; }
.card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 20px; display: flex; align-items: center; gap: 16px; transition: all 0.2s;
}
.card:hover { border-color: var(--border-light); transform: translateY(-1px); box-shadow: var(--shadow); }
.card-icon { width: 48px; height: 48px; border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.card-today .card-icon { background: rgba(59,130,246,0.1); }
.card-week .card-icon { background: rgba(139,92,246,0.1); }
.card-month .card-icon { background: rgba(16,185,129,0.1); }
.card-devices .card-icon { background: rgba(245,158,11,0.1); }
.card-body { display: flex; flex-direction: column; }
.card-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.card-value { font-size: 24px; font-weight: 800; margin-top: 4px; letter-spacing: -0.5px; }
.card-today .card-value { color: var(--blue-light); }
.card-week .card-value { color: var(--purple); }
.card-month .card-value { color: var(--green); }
.card-devices .card-value { color: var(--amber); }

/* --- CHARTS --- */
.charts-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(500px, 1fr)); gap: 16px; margin-bottom: 24px; }
.chart-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 20px; transition: border-color 0.2s;
}
.chart-card:hover { border-color: var(--border-light); }
.chart-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; flex-wrap: wrap; gap: 8px; }
.chart-header h2 { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.chart-badge {
    font-size: 11px; color: var(--text-muted); background: var(--bg-input);
    padding: 4px 10px; border-radius: 20px; border: 1px solid var(--border);
}
.chart-wrap { position: relative; width: 100%; height: 320px; }
.chart-wrap canvas { width: 100% !important; height: 100% !important; }

/* --- DEVICES TABLE --- */
.table-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 20px; margin-bottom: 24px;
}
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th {
    text-align: left; padding: 10px 12px; color: var(--text-muted); font-size: 11px;
    text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600;
    border-bottom: 1px solid var(--border); white-space: nowrap;
}
tbody td {
    padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
tbody tr:hover { background: var(--bg-card-hover); }
.empty-state { text-align: center; color: var(--text-muted); padding: 32px !important; font-size: 14px; }
.device-name { font-weight: 600; color: var(--text-primary); }
.device-mac { font-family: 'SF Mono', 'Fira Code', monospace; font-size: 12px; color: var(--text-secondary); }
.usage-bar-wrap { display: flex; align-items: center; gap: 8px; }
.usage-bar { width: 60px; height: 6px; background: var(--bg-input); border-radius: 3px; overflow: hidden; }
.usage-bar-fill { height: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--blue), var(--purple)); }

/* --- FOOTER --- */
.footer {
    text-align: center; padding: 24px; color: var(--text-muted); font-size: 12px;
    border-top: 1px solid var(--border);
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .header { padding: 12px 16px; }
    .header h1 { font-size: 15px; }
    .main { padding: 16px; }
    .cards-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .card { padding: 14px; }
    .card-value { font-size: 18px; }
    .charts-row { grid-template-columns: 1fr; }
    .chart-wrap { height: 260px; }
}

@media (max-width: 480px) {
    .cards-grid { grid-template-columns: 1fr; }
}