/* ═══════════════════════════════════════════════════════════════
   Pcap Analyzer Pro — Stylesheet
   Dark/Light theme support, dual-PCAP comparison UI
   ═══════════════════════════════════════════════════════════════ */

/* ─── Variables ─── */
:root {
    --bg-color: #0d1117;
    --panel-bg: rgba(22, 27, 34, 0.85);
    --panel-bg-solid: #161b22;
    --border-color: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent-color: #2f81f7;
    --danger-color: #f85149;
    --warning-color: #d29922;
    --success-color: #3fb950;
    --info-color: #58a6ff;
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius: 8px;
    --shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    --side-a-color: #58a6ff;
    --side-b-color: #a371f7;
}

[data-theme="light"] {
    --bg-color: #f6f8fa;
    --panel-bg: rgba(255, 255, 255, 0.9);
    --panel-bg-solid: #ffffff;
    --border-color: #d0d7de;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --accent-color: #0969da;
    --danger-color: #cf222e;
    --warning-color: #9a6700;
    --success-color: #1a7f37;
    --info-color: #0550ae;
    --shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
    --side-a-color: #0969da;
    --side-b-color: #8250df;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
}

/* ─── Layout ─── */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ─── Header ─── */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1.25rem;
    background: var(--panel-bg-solid);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent-color);
    white-space: nowrap;
}

.file-control {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

/* ─── Side Upload Controls ─── */
.side-upload {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.7rem;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    border: 1px solid var(--border-color);
    background: var(--panel-bg);
    color: var(--text-primary);
}

.upload-btn:hover {
    border-color: var(--accent-color);
    background: rgba(47, 129, 247, 0.1);
}

.side-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 700;
    color: #fff;
}

.side-a-btn .side-label {
    background: var(--side-a-color);
}

.side-b-btn .side-label {
    background: var(--side-b-color);
}

.side-a-btn:hover { border-color: var(--side-a-color); }
.side-b-btn:hover { border-color: var(--side-b-color); }

.file-name {
    font-size: 0.75rem;
    color: var(--text-secondary);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Compare Button */
.btn-compare {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-color);
    background: var(--panel-bg);
    color: var(--text-secondary);
    transition: all 0.2s;
}

.btn-compare:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-compare.btn-ready {
    background: rgba(47, 129, 247, 0.15);
    border-color: var(--accent-color);
    color: var(--accent-color);
    animation: pulse-compare 2s infinite;
}

.btn-compare.btn-ready:hover {
    background: var(--accent-color);
    color: #fff;
}

@keyframes pulse-compare {
    0%, 100% { box-shadow: 0 0 0 0 rgba(47, 129, 247, 0.3); }
    50% { box-shadow: 0 0 0 4px rgba(47, 129, 247, 0.1); }
}

.theme-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.35rem;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    transition: color 0.2s, border-color 0.2s;
}

.theme-btn:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

/* ─── Dashboard ─── */
.dashboard {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 0.75rem;
    gap: 0.6rem;
    overflow: hidden;
}

/* ─── Stats Bar ─── */
.stats-bar {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.stat-card {
    flex: 1;
    min-width: 110px;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 0.6rem 0.8rem;
    text-align: center;
}

.stat-card h3 {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-bottom: 0.2rem;
}

.stat-card .stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.stat-card.alert .stat-value { color: var(--danger-color); }
.stat-card.warn .stat-value { color: var(--warning-color); }

/* ─── Side Indicator ─── */
.side-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.8rem;
    justify-content: center;
    flex-wrap: wrap;
}

.side-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.side-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.side-a-dot { background: var(--side-a-color); }
.side-b-dot { background: var(--side-b-color); }

.side-arrow {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.side-pkt-count {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-left: 0.25rem;
}

/* ─── Filter Bar ─── */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-input-group {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 0.3rem 0.6rem;
    flex: 1;
    min-width: 300px;
    color: var(--text-secondary);
}

.filter-input-group input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    outline: none;
    min-width: 0;
}

.filter-input-group input::placeholder { color: var(--text-secondary); opacity: 0.6; }

.filter-status {
    font-size: 0.75rem;
    color: var(--info-color);
    font-weight: 600;
    white-space: nowrap;
}

/* ─── Buttons ─── */
.btn-primary {
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary:hover { opacity: 0.85; }

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
}

.btn-secondary:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.btn-small {
    padding: 0.2rem 0.5rem;
    font-size: 0.72rem;
    border-radius: 4px;
    cursor: pointer;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-small:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* ─── Tabs ─── */
.tab-bar {
    display: flex;
    gap: 0.15rem;
    overflow-x: auto;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
}

.tab-btn {
    padding: 0.5rem 0.9rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover { color: var(--text-primary); }

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
    font-weight: 600;
}

.tab-btn-compare.active {
    color: var(--side-b-color);
    border-bottom-color: var(--side-b-color);
}

.tab-content { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.tab-panel { display: none; flex: 1; overflow: hidden; flex-direction: column; }
.tab-panel.active { display: flex; }

/* ─── Tables ─── */
.table-container {
    overflow-y: auto;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

thead th {
    background: var(--panel-bg-solid);
    padding: 0.6rem 0.75rem;
    text-align: left;
    color: var(--text-secondary);
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 2;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

tbody tr {
    border-bottom: 1px solid rgba(48, 54, 61, 0.3);
    cursor: pointer;
    transition: background 0.1s;
}

tbody tr:hover {
    background: rgba(47, 129, 247, 0.06);
}

td {
    padding: 0.5rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    white-space: nowrap;
}

.cell-info {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 400px;
}

/* Row Highlights */
.row-error     { color: var(--danger-color); }
.row-warning   { color: var(--warning-color); }

.issue-row.issue-error   { color: var(--danger-color); }
.issue-row.issue-warning { color: var(--warning-color); }
.issue-row.issue-info    { color: var(--info-color); }

/* Protocol Badges */
.proto-badge {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

.proto-tcp  { background: rgba(47, 129, 247, 0.15); color: #58a6ff; }
.proto-udp  { background: rgba(63, 185, 80, 0.15); color: #3fb950; }
.proto-http { background: rgba(210, 153, 34, 0.15); color: #d29922; }
.proto-dns  { background: rgba(163, 113, 247, 0.15); color: #a371f7; }
.proto-icmp { background: rgba(248, 81, 73, 0.15); color: #f85149; }
.proto-arp  { background: rgba(139, 148, 158, 0.15); color: #8b949e; }
.proto-ipv6 { background: rgba(88, 166, 255, 0.15); color: #58a6ff; }

/* State Badges */
.state-ok    { color: var(--success-color); font-weight: 600; }
.state-error { color: var(--danger-color); font-weight: 600; }
.state-warn  { color: var(--warning-color); font-weight: 600; }

.badge-danger {
    display: inline-block;
    background: rgba(248, 81, 73, 0.2);
    color: var(--danger-color);
    padding: 1px 6px;
    border-radius: 3px;
    font-weight: 600;
}

/* Status badges for HTTP/DNS */
.status-ok           { color: var(--success-color); }
.status-timeout      { color: var(--danger-color); font-weight: 600; }
.status-server-error { color: var(--danger-color); font-weight: 600; }
.status-client-error { color: var(--warning-color); }
.status-nxdomain     { color: var(--warning-color); }
.status-servfail     { color: var(--danger-color); }
.status-error        { color: var(--danger-color); }

/* ─── Panel Toolbar ─── */
.panel-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--panel-bg);
    font-size: 0.8rem;
    color: var(--text-secondary);
    gap: 0.5rem;
}

.panel-toolbar div {
    display: flex;
    gap: 0.4rem;
}

/* ─── Panel (Packet Details) ─── */
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.3s ease;
}

.panel.minimized {
    max-height: 40px;
    overflow: hidden;
}

.panel-header {
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--panel-bg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 40px;
}

.panel-header h2 {
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.panel-controls button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
}

.panel-controls button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* ─── Packet Details View ─── */
.packet-data-view {
    font-family: var(--font-mono);
    padding: 0.75rem 1rem;
    background: var(--bg-color);
    overflow-x: auto;
    max-height: 350px;
    overflow-y: auto;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.detail-header {
    padding: 0.5rem 0;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.detail-error {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid rgba(248, 81, 73, 0.3);
    border-radius: 4px;
    padding: 0.4rem 0.75rem;
    color: var(--danger-color);
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
}

.detail-layers {
    margin-bottom: 0.75rem;
}

.layer-name {
    cursor: pointer;
    color: var(--accent-color);
    font-weight: 600;
    padding: 3px 0;
}

.detail-field {
    padding-left: 1rem;
    color: var(--text-secondary);
    font-size: 0.78rem;
}

.field-key { color: var(--info-color); }
.field-val { color: var(--text-primary); }

.detail-hex {
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
    white-space: pre;
    color: var(--text-secondary);
    font-size: 0.75rem;
    line-height: 1.6;
}

/* Side Tags in packet details */
.side-tag {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 0.65rem;
    font-weight: 700;
    margin-left: 0.5rem;
}

.side-a-tag {
    background: rgba(88, 166, 255, 0.15);
    color: var(--side-a-color);
}

.side-b-tag {
    background: rgba(163, 113, 247, 0.15);
    color: var(--side-b-color);
}

/* ─── Flow Visualization ─── */
.flow-visualization {
    height: 500px;
    background: var(--bg-color);
    position: relative;
    overflow: auto;
    cursor: crosshair;
}

/* ─── Timeline ─── */
.timeline-container {
    max-height: 500px;
    overflow-y: auto;
    padding: 0.5rem;
}

.timeline-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    padding-left: 1.5rem;
}

.timeline-list::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.5rem;
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.8rem;
    position: relative;
    transition: background 0.1s;
}

.timeline-item:hover {
    background: rgba(47, 129, 247, 0.06);
}

.tl-dot {
    position: absolute;
    left: -1.35rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: var(--bg-color);
}

.timeline-error .tl-dot    { border-color: var(--danger-color); background: var(--danger-color); }
.timeline-warning .tl-dot  { border-color: var(--warning-color); background: var(--warning-color); }
.timeline-info .tl-dot     { border-color: var(--info-color); background: var(--info-color); }

.tl-time {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-secondary);
    min-width: 100px;
}

.tl-pkt {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--accent-color);
    min-width: 45px;
}

.tl-text {
    color: var(--text-primary);
    font-size: 0.8rem;
}

/* ═══════════════════════════════════════════════════════════════
   COMPARISON TAB STYLES
   ═══════════════════════════════════════════════════════════════ */

.comparison-content {
    overflow-y: auto;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.comparison-placeholder {
    padding: 3rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Comparison Summary Cards */
.comp-summary {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.comp-summary-card {
    flex: 1;
    min-width: 130px;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 0.6rem 0.8rem;
    text-align: center;
}

.comp-summary-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-bottom: 0.2rem;
}

.comp-summary-value {
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.comp-summary-sub {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 0.1rem;
}

.comp-value-ok    { color: var(--success-color); }
.comp-value-error { color: var(--danger-color); }
.comp-value-warn  { color: var(--warning-color); }

/* Comparison Sections */
.comp-section {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
}

.comp-section-title {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--panel-bg-solid);
    color: var(--text-primary);
}

.comp-section-desc {
    font-size: 0.78rem;
    color: var(--text-secondary);
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.comp-dropped-side-a { border-left: 3px solid var(--side-a-color); }
.comp-dropped-side-b { border-left: 3px solid var(--side-b-color); }

/* Latency Grid */
.comp-latency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.5rem;
    padding: 0.75rem;
}

.comp-latency-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    background: var(--bg-color);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.comp-lat-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}

.comp-lat-value {
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
}

/* Comparison Issues */
.comp-issues-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.comp-issue-item {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.comp-issue-item:last-child {
    border-bottom: none;
}

.comp-issue-error  { border-left: 3px solid var(--danger-color); }
.comp-issue-warning { border-left: 3px solid var(--warning-color); }
.comp-issue-info   { border-left: 3px solid var(--info-color); }

.comp-issue-header {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.comp-issue-desc {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.comp-cat-badge {
    display: inline-block;
    padding: 0 5px;
    border-radius: 3px;
    font-size: 0.62rem;
    font-weight: 500;
    background: rgba(139, 148, 158, 0.15);
    color: var(--text-secondary);
    margin-left: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* Single Side Comparison */
.comp-single-side {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.comp-single-header {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1rem;
}

.comp-single-header h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.comp-single-hint {
    font-size: 0.82rem;
    color: var(--text-secondary);
    background: rgba(47, 129, 247, 0.08);
    border: 1px solid rgba(47, 129, 247, 0.2);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    line-height: 1.4;
}

/* Flow comparison table */
.comp-flow-table td,
.comp-match-table td {
    font-size: 0.75rem;
}

/* ─── Modal ─── */
.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}

.modal-box {
    background: var(--panel-bg-solid);
    width: 85%;
    max-width: 900px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    max-height: 85vh;
    box-shadow: var(--shadow);
}

.modal-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1rem;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.5rem;
    line-height: 1;
    padding: 0 0.25rem;
}

.modal-close:hover { color: var(--text-primary); }

.modal-body {
    padding: 1rem;
    overflow: auto;
    flex: 1;
}

.stream-content {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text-primary);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1rem;
    max-height: 60vh;
    overflow: auto;
    line-height: 1.5;
}

/* ─── Empty State ─── */
.empty-state {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

.empty-content {
    max-width: 550px;
}

.empty-content svg {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.empty-content h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.empty-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

/* Upload Guide */
.upload-guide {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    text-align: left;
}

.upload-guide-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.upload-guide-icon {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.upload-guide-note {
    font-size: 0.78rem;
    color: var(--text-secondary);
    background: rgba(47, 129, 247, 0.06);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    margin-top: 0.25rem;
    line-height: 1.4;
}

.feature-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    text-align: left;
}

.feature-item {
    font-size: 0.82rem;
    color: var(--text-secondary);
    padding: 0.3rem 0;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .stats-bar { flex-direction: column; }
    .feature-list { grid-template-columns: 1fr; }
    .app-header { flex-direction: column; gap: 0.5rem; }
    .filter-input-group { min-width: 100%; }
    .cell-info { max-width: 200px; }
    .side-indicator { flex-direction: column; gap: 0.25rem; }
    .comp-summary { flex-direction: column; }
    .comp-latency-grid { grid-template-columns: repeat(2, 1fr); }
    .ao-options-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════
   ANALYSIS OPTIONS MODAL
   ═══════════════════════════════════════════════════════════════════ */

.ao-modal-content {
    max-width: 640px;
}

.ao-file-info {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
    text-align: center;
}

.ao-file-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.ao-file-stats {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
}

.ao-proto-summary {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
}

.ao-proto-badge {
    font-size: 0.72rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

.ao-proto-count {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-left: -0.3rem;
}

.ao-section-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.ao-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.ao-option {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.7rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s;
    background: transparent;
}

.ao-option:hover {
    border-color: var(--accent-color);
    background: rgba(88, 166, 255, 0.04);
}

.ao-option input[type="checkbox"] {
    margin-top: 0.3rem;
    flex-shrink: 0;
    accent-color: var(--accent-color);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.ao-option-dim {
    opacity: 0.45;
}

.ao-option-dim:hover {
    border-color: var(--border-color);
    background: transparent;
}

.ao-option-content {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
}

.ao-option-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    margin-top: 0.05rem;
}

.ao-option-text strong {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

.ao-option-text small {
    display: block;
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.3;
    margin-top: 0.15rem;
}

.ao-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.ao-actions-spacer {
    flex: 1;
}

.ao-btn-selectall,
.ao-btn-selectnone {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.35rem 0.7rem;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.ao-btn-selectall:hover,
.ao-btn-selectnone:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.ao-btn-analyze {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 0.55rem 1.4rem;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(88, 166, 255, 0.3);
}

.ao-btn-analyze:hover {
    background: #4c9aed;
    box-shadow: 0 4px 14px rgba(88, 166, 255, 0.4);
    transform: translateY(-1px);
}

.ao-btn-analyze svg {
    flex-shrink: 0;
}

/* === Main Analyze Button (toolbar) === */
.btn-analyze {
    display: none;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.4rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: linear-gradient(135deg, #238636, #2ea043);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(46, 160, 67, 0.35);
    transition: all 0.2s ease;
}
.btn-analyze:hover {
    background: linear-gradient(135deg, #2ea043, #3fb950);
    box-shadow: 0 4px 16px rgba(46, 160, 67, 0.5);
    transform: translateY(-1px);
}
.btn-analyze:active {
    transform: translateY(0);
}
.btn-analyze.pulse {
    animation: analyzePulse 1.8s ease-in-out infinite;
}
@keyframes analyzePulse {
    0%, 100% { box-shadow: 0 2px 8px rgba(46, 160, 67, 0.35); }
    50% { box-shadow: 0 2px 20px rgba(46, 160, 67, 0.65), 0 0 30px rgba(46, 160, 67, 0.2); }
}

/* === Summary Tab === */
.summary-container { padding: 0.5rem 0; }
.summary-placeholder { padding: 2rem; text-align: center; color: var(--text-secondary); }

.summary-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}
.summary-row-top {
    grid-template-columns: auto 1fr 1fr;
}
.summary-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.2rem;
}
.summary-card h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin: 0 0 0.8rem 0;
    color: var(--text-primary);
}
.summary-card-full {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.2rem;
    margin-bottom: 1rem;
}
.summary-card-full h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin: 0 0 0.8rem 0;
    color: var(--text-primary);
}

/* Health Ring */
.summary-health-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 160px;
    max-width: 200px;
}
.summary-health-ring {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 6px solid;
    margin-bottom: 0.5rem;
}
.summary-health-ring.health-good { border-color: #2ea043; background: rgba(46,160,67,0.08); }
.summary-health-ring.health-warn { border-color: #d29922; background: rgba(210,153,34,0.08); }
.summary-health-ring.health-bad { border-color: #f85149; background: rgba(248,81,73,0.08); }
.summary-health-score {
    font-size: 2rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
}
.health-good .summary-health-score { color: #2ea043; }
.health-warn .summary-health-score { color: #d29922; }
.health-bad .summary-health-score { color: #f85149; }
.summary-health-label { font-weight: 600; font-size: 1rem; margin-bottom: 0.2rem; }
.summary-health-sub { font-size: 0.75rem; color: var(--text-secondary); text-align: center; }

/* Key-Value rows */
.summary-kv {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.82rem;
}
.summary-kv:last-child { border-bottom: none; }
.summary-kv span { color: var(--text-secondary); }
.summary-kv strong { color: var(--text-primary); }
.text-warn { color: #d29922 !important; }
.text-danger { color: #f85149 !important; }

/* Findings */
.summary-findings { display: flex; flex-direction: column; gap: 0.5rem; }
.summary-finding {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    font-size: 0.85rem;
    line-height: 1.4;
}
.finding-error { background: rgba(248,81,73,0.08); border-left: 3px solid #f85149; }
.finding-warning { background: rgba(210,153,34,0.08); border-left: 3px solid #d29922; }
.finding-info { background: rgba(88,166,255,0.08); border-left: 3px solid #58a6ff; }
.finding-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }
.finding-text { color: var(--text-primary); }

/* Protocol distribution bars */
.summary-proto-list { display: flex; flex-direction: column; gap: 0.4rem; }
.summary-proto-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
}
.summary-proto-row .proto-badge { min-width: 55px; text-align: center; }
.summary-proto-bar-bg {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}
.summary-proto-bar {
    height: 100%;
    background: linear-gradient(90deg, #58a6ff, #2f81f7);
    border-radius: 4px;
    transition: width 0.4s ease;
}
.summary-proto-count { font-size: 0.75rem; color: var(--text-secondary); min-width: 80px; text-align: right; font-family: 'JetBrains Mono', monospace; }

/* Top talkers */
.summary-talker-list { display: flex; flex-direction: column; gap: 0.4rem; }
.summary-talker-row { display: flex; align-items: center; gap: 0.5rem; font-size: 0.8rem; }
.summary-talker-rank { font-weight: 600; color: var(--text-secondary); min-width: 24px; }
.summary-talker-ip { font-family: 'JetBrains Mono', monospace; min-width: 130px; color: var(--text-primary); }
.summary-talker-bar { background: linear-gradient(90deg, #d29922, #e3b341) !important; }

/* Issue categories */
.summary-categories { display: flex; flex-direction: column; gap: 0.4rem; }
.summary-category-row { display: flex; justify-content: space-between; align-items: center; padding: 0.35rem 0; border-bottom: 1px solid var(--border-color); font-size: 0.82rem; }
.summary-category-row:last-child { border-bottom: none; }
.summary-category-name { color: var(--text-primary); font-weight: 500; }
.summary-category-counts { display: flex; gap: 0.4rem; }

/* Severity badges */
.severity-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
}
.severity-error { background: rgba(248,81,73,0.15); color: #f85149; }
.severity-warning { background: rgba(210,153,34,0.15); color: #d29922; }
.severity-info { background: rgba(88,166,255,0.15); color: #58a6ff; }

/* === Issue Detail Banner === */
.issue-detail-banner {
    margin-bottom: 0.8rem;
    animation: slideDown 0.2s ease;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
.issue-detail-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}
.issue-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1rem;
    background: var(--hover-bg);
    border-bottom: 1px solid var(--border-color);
}
.issue-detail-title { font-weight: 600; font-size: 0.95rem; }
.issue-detail-close {
    background: none; border: none; cursor: pointer; color: var(--text-secondary);
    font-size: 1.4rem; line-height: 1; padding: 0 0.3rem;
}
.issue-detail-close:hover { color: var(--text-primary); }
.issue-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.78rem;
    color: var(--text-secondary);
    align-items: center;
}
.issue-category-badge {
    background: rgba(139,148,158,0.15);
    color: var(--text-secondary);
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}
.issue-detail-body { padding: 1rem; }
.issue-detail-section { margin-bottom: 0.8rem; }
.issue-detail-section:last-child { margin-bottom: 0; }
.issue-detail-section h4 {
    font-size: 0.8rem;
    font-weight: 600;
    margin: 0 0 0.3rem 0;
    color: var(--text-primary);
}
.issue-detail-section p {
    font-size: 0.82rem;
    line-height: 1.5;
    margin: 0;
    color: var(--text-secondary);
}
.issue-recommendation {
    font-family: 'Inter', sans-serif;
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
    white-space: pre-wrap;
    background: var(--hover-bg);
    padding: 0.6rem 0.8rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}
.issue-detail-actions {
    padding: 0.6rem 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
}