/* ============================================
   NR TRACK — Dashboard Stylesheet
   ============================================ */

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

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #0f172a;
    --bg-tertiary: #1e293b;
    --border-color: #1e293b;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #38bdf8;
    --accent-purple: #7c3aed;
    --accent-green: #22c55e;
    --accent-yellow: #f59e0b;
    --accent-red: #ef4444;
    --accent-orange: #f97316;
}

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

/* ===== TOPBAR ===== */
.topbar {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    border-bottom: 1px solid var(--border-color);
    padding: 18px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 2000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.brand h1 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--accent-blue);
    letter-spacing: 3px;
    margin-bottom: 2px;
}
.brand p {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}
.live-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(34,197,94,0.1);
    border: 1px solid rgba(34,197,94,0.3);
    color: var(--accent-green);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.live-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: blink 1.5s infinite;
}
@keyframes blink {
    0%,100%{opacity:1}
    50%{opacity:0.3}
}

/* ===== NAV TABS ===== */
nav.main-nav {
    background: #0f172a !important;
    border-bottom: 2px solid #1e293b !important;
    padding: 0 28px !important;
    display: flex !important;
    gap: 4px !important;
}
button.nav-btn {
    background: transparent !important;
    color: #94a3b8 !important;
    border: none !important;
    border-bottom: 3px solid transparent !important;
    padding: 14px 24px !important;
    font-size: 13px !important;
    font-weight: 700 !important;
    cursor: pointer !important;
    font-family: inherit !important;
    text-transform: uppercase !important;
    letter-spacing: 1px !important;
    transition: all 0.2s !important;
    outline: none !important;
}
button.nav-btn:hover {
    color: #e2e8f0 !important;
}
button.nav-btn.active {
    color: #38bdf8 !important;
    border-bottom-color: #38bdf8 !important;
}

.page { display: none; }
.page.active { display: block; }

/* ===== CONTROL PANEL ===== */
.control-panel {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 28px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: center;
    position: sticky;
    top: 78px;
    z-index: 1999;
}
.control-group {
    display: flex;
    align-items: center;
    gap: 10px;
}
.control-group label {
    font-size: 0.68rem;
    color: var(--text-secondary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.control-group select,
.control-group input[type="date"] {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid #334155;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    outline: none;
}

.filter-buttons { display: flex; gap: 5px; }
.filter-btn {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid #334155;
    padding: 7px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 700;
    transition: all 0.2s;
    font-family: inherit;
}
.filter-btn.active {
    background: var(--accent-blue);
    color: var(--bg-primary);
    border-color: var(--accent-blue);
}
.filter-btn.active.btn-5g { background: var(--accent-purple); color: white; }
.filter-btn.active.btn-4g { background: #0ea5e9; color: white; }
.filter-btn.active.btn-3g { background: #a855f7; color: white; }
.filter-btn.active.btn-2g { background: var(--accent-yellow); color: white; }

.btn-refresh {
    background: var(--accent-blue);
    color: var(--bg-primary);
    border: none;
    padding: 9px 22px;
    border-radius: 8px;
    font-weight: 800;
    font-size: 0.78rem;
    cursor: pointer;
    margin-left: auto;
    font-family: inherit;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* ===== STATS ===== */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 14px;
    padding: 20px 28px;
}
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 18px;
    border-radius: 14px;
    position: relative;
    overflow: hidden;
}
.card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: var(--accent-blue);
}
.card.good::before { background: var(--accent-green); }
.card.warn::before { background: var(--accent-yellow); }
.card.bad::before { background: var(--accent-red); }
.card.neutral::before { background: var(--text-muted); }
.card .label {
    font-size: 0.68rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    font-weight: 800;
    margin-bottom: 10px;
}
.card .value {
    font-size: 1.7rem;
    font-weight: 800;
    color: #f1f5f9;
    line-height: 1;
}
.card .sub {
    font-size: 0.68rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* ===== MAIN GRID ===== */
.main-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 16px;
    padding: 0 28px 16px;
}
@media (max-width: 1024px) { .main-grid { grid-template-columns: 1fr; } }

.panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    overflow: hidden;
}
.panel-header {
    padding: 14px 20px;
    background: var(--bg-tertiary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--bg-secondary);
    flex-wrap: wrap;
    gap: 10px;
}
.panel-header h2 {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 800;
}

#map { height: 600px; width: 100%; z-index: 1; }

.layer-switcher {
    display: flex;
    gap: 4px;
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: 8px;
}
.layer-btn {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 700;
    font-family: inherit;
    text-transform: uppercase;
}
.layer-btn.active { background: var(--accent-blue); color: var(--bg-primary); }

.chart-container { padding: 20px; height: 400px; }

/* ===== TABLE ===== */
.table-section { padding: 0 28px 28px; }
.table-wrap { max-height: 550px; overflow-y: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}
th {
    background: var(--bg-tertiary);
    color: var(--accent-blue);
    padding: 12px 14px;
    text-align: left;
    font-weight: 800;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: sticky;
    top: 0;
    z-index: 10;
}
td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: #cbd5e1;
    font-size: 0.78rem;
    white-space: nowrap;
}
.empty-row {
    text-align: center;
    padding: 40px 20px !important;
    color: var(--text-muted);
    font-style: italic;
}

.badge {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 5px;
    font-size: 0.68rem;
    font-weight: 800;
}
.badge.nr { background: var(--accent-purple); color: white; }
.badge.lte { background: #0ea5e9; color: white; }
.badge.umts { background: #a855f7; color: white; }
.badge.gsm { background: var(--accent-yellow); color: white; }
.badge.other { background: var(--text-muted); color: white; }

.val-good { color: var(--accent-green); font-weight: 800; }
.val-warn { color: var(--accent-yellow); font-weight: 800; }
.val-bad { color: var(--accent-red); font-weight: 800; }
.val-poor { color: var(--accent-orange); font-weight: 800; }

/* ===== LEGEND ===== */
.legend-box {
    position: absolute;
    bottom: 24px;
    right: 24px;
    background: rgba(10,14,26,0.95);
    padding: 14px 18px;
    border-radius: 12px;
    font-size: 0.72rem;
    z-index: 1000;
    border: 1px solid #334155;
}
.legend-box h4 {
    margin-bottom: 10px;
    color: var(--accent-blue);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
}
.legend-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 5px;
    color: var(--text-secondary);
}
.legend-color {
    width: 22px;
    height: 9px;
    border-radius: 3px;
}

/* ============================================
   SESSIONS
   ============================================ */
.sessions-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px 16px;
}
.sessions-header h2 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 800;
}
.sessions-list {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)) !important;
    gap: 16px !important;
    padding: 0 28px 28px !important;
}
.session-card {
    background: #0f172a !important;
    border: 1px solid #1e293b !important;
    border-radius: 14px !important;
    padding: 18px !important;
    border-left: 4px solid #38bdf8 !important;
    transition: all 0.2s !important;
    display: block !important;
    color: #e2e8f0 !important;
}
.session-card:hover {
    transform: translateY(-3px) !important;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4) !important;
    border-left-color: #7c3aed !important;
}
.session-card .session-type {
    display: inline-block !important;
    padding: 3px 10px !important;
    border-radius: 4px !important;
    font-size: 0.65rem !important;
    font-weight: 800 !important;
    background: rgba(56,189,248,0.15) !important;
    color: #38bdf8 !important;
    margin-bottom: 10px !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
}
.session-card .session-type.bts {
    background: rgba(124,58,237,0.15) !important;
    color: #a855f7 !important;
}
.session-card .session-name {
    font-size: 1rem !important;
    font-weight: 800 !important;
    color: #f1f5f9 !important;
    margin-bottom: 8px !important;
}
.session-card .session-id {
    font-size: 0.78rem !important;
    color: #38bdf8 !important;
    font-weight: 700 !important;
    margin-bottom: 10px !important;
    word-break: break-all !important;
    font-family: 'Consolas', 'Monaco', monospace !important;
}
.session-card .session-meta {
    font-size: 0.75rem !important;
    color: #94a3b8 !important;
    line-height: 1.7 !important;
    margin-bottom: 12px !important;
}

.session-actions {
    display: flex !important;
    gap: 8px !important;
    padding-top: 12px !important;
    border-top: 1px solid #1e293b !important;
}
.btn-view, .btn-delete {
    flex: 1 !important;
    padding: 9px 12px !important;
    border-radius: 6px !important;
    font-size: 0.72rem !important;
    font-weight: 800 !important;
    cursor: pointer !important;
    font-family: inherit !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
    border: none !important;
    transition: all 0.2s !important;
}
.btn-view {
    background: rgba(56,189,248,0.15) !important;
    color: #38bdf8 !important;
    border: 1px solid rgba(56,189,248,0.3) !important;
}
.btn-view:hover {
    background: #38bdf8 !important;
    color: #0a0e1a !important;
}
.btn-delete {
    background: rgba(239,68,68,0.15) !important;
    color: #ef4444 !important;
    border: 1px solid rgba(239,68,68,0.3) !important;
}
.btn-delete:hover {
    background: #ef4444 !important;
    color: white !important;
}

/* SESSION DETAIL */
.session-detail {
    margin: 0 28px 28px;
    background: #0f172a;
    border: 1px solid #1e293b;
    border-radius: 14px;
    overflow: hidden;
}
.session-detail-header {
    padding: 18px 24px;
    background: #1e293b;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.session-detail-header h3 {
    font-size: 1rem;
    color: #f1f5f9;
    margin-bottom: 4px;
}
.session-detail-header p {
    font-size: 0.78rem;
    color: #94a3b8;
}
.btn-close {
    background: transparent;
    border: none;
    color: #94a3b8;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0 10px;
}
.session-detail-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    padding: 18px 24px;
}
.info-box { display: flex; flex-direction: column; gap: 4px; }
.info-box .label {
    font-size: 0.65rem;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}
.info-box span:last-child {
    font-size: 1rem;
    font-weight: 700;
    color: #f1f5f9;
}

.start-marker, .end-marker, .bts-marker {
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 800;
    border: 2px solid white;
    text-align: center;
}
.start-marker { background: #22c55e; }
.end-marker { background: #ef4444; }
.bts-marker { background: #7c3aed; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 5px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .topbar { padding: 14px 16px; }
    .control-panel { padding: 12px 16px; }
    .stats { padding: 16px; }
    .main-grid { padding: 0 16px 12px; }
    .table-section { padding: 0 16px 16px; }
    .sessions-list { padding: 0 16px 16px !important; grid-template-columns: 1fr !important; }
    .session-detail { margin: 0 16px 16px; }
    #map { height: 400px; }
}