:root {
    --bg: #0b1628;
    --card: #0f1f3a;
    --card-border: #1a3155;
    --text: #c4d0e0;
    --text-dim: #5f7a99;
    --text-bright: #e6edf6;
    --accent: #4ebd6b;
    --accent-dim: #358a4c;
    --red: #ef4444;
    --blue: #5ba3f5;
    --purple: #a07ee8;
    --cyan: #4ec9d4;
    --pink: #e66da0;
    --orange: #f5a340;
    --gold: #d4a843;
    --grid: #162a4a;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: "JetBrains Mono", "Fira Code", monospace;
    min-height: 100vh;
}

.header {
    padding: 14px 24px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(180deg, #0f2140 0%, #0b1628 100%);
    flex-wrap: wrap;
    gap: 10px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dim));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 900;
    color: #fff;
    letter-spacing: 0.02em;
    box-shadow: 0 0 12px rgba(78, 189, 107, 0.25);
}

.header-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-bright);
    letter-spacing: 0.02em;
}
.header-sub {
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.header-sub .gold {
    color: var(--gold);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.frame-count {
    font-size: 11px;
    color: var(--accent);
    padding: 3px 10px;
    border-radius: 3px;
    background: rgba(78, 189, 107, 0.1);
    border: 1px solid rgba(78, 189, 107, 0.25);
    display: none;
}
.frame-count.visible {
    display: inline-block;
}

.btn {
    padding: 7px 16px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    background: var(--accent);
    color: #0b1628;
    font-size: 12px;
    font-weight: 700;
    font-family: "JetBrains Mono", monospace;
    letter-spacing: 0.04em;
    box-shadow: 0 0 10px rgba(78, 189, 107, 0.2);
    transition: opacity 0.15s;
}
.btn:hover {
    opacity: 0.85;
}

.btn-outline {
    padding: 6px 12px;
    border-radius: 3px;
    cursor: pointer;
    background: transparent;
    font-size: 11px;
    font-weight: 600;
    font-family: "JetBrains Mono", monospace;
    color: var(--text-dim);
    border: 1px solid var(--card-border);
    transition: all 0.15s;
}
.btn-outline.active {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(78, 189, 107, 0.08);
}

/* Tabs */
.tab-bar {
    display: flex;
    gap: 0;
    padding: 0 24px;
    border-bottom: 1px solid var(--card-border);
    background: #0d1a30;
    overflow-x: auto;
}

.tab-btn {
    padding: 10px 18px;
    border: none;
    cursor: pointer;
    background: transparent;
    font-size: 12px;
    font-weight: 600;
    font-family: "JetBrains Mono", monospace;
    color: var(--text-dim);
    border-bottom: 2px solid transparent;
    letter-spacing: 0.03em;
    white-space: nowrap;
    transition: color 0.15s;
}
.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}
.tab-btn:hover {
    color: var(--text-bright);
}

/* Content */
.content {
    padding: 16px 24px;
    max-width: 1200px;
    margin: 0 auto;
}
.tab-panel {
    display: none;
}
.tab-panel.active {
    display: block;
}

/* Cards */
.card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    padding: 16px 20px;
    margin-bottom: 12px;
}
.card-header {
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 6px;
}
.card-title {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
}
.card-subtitle {
    font-size: 11px;
    color: var(--text-dim);
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 10px;
    margin-bottom: 14px;
}
.stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-bright);
    text-align: center;
}
.stat-value.warn {
    color: var(--red);
}
.stat-unit {
    font-size: 11px;
    color: var(--text-dim);
    margin-left: 3px;
}
.stat-label {
    font-size: 10px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 2px;
    text-align: center;
}

/* Chart containers */
.chart-wrap {
    position: relative;
    width: 100%;
}
.chart-wrap canvas {
    width: 100% !important;
}

/* Status badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    margin-right: 4px;
    margin-bottom: 4px;
}
.badge-ok {
    background: rgba(78, 189, 107, 0.08);
    color: var(--accent);
    border: 1px solid rgba(78, 189, 107, 0.2);
}
.badge-warn {
    background: rgba(239, 68, 68, 0.12);
    color: var(--red);
    border: 1px solid rgba(239, 68, 68, 0.25);
}

/* CAN table */
.can-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
}
.can-table th {
    padding: 6px 8px;
    text-align: left;
    color: var(--text-dim);
    font-weight: 600;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 1px solid var(--card-border);
}
.can-table td {
    padding: 4px 8px;
    border-bottom: 1px solid rgba(26, 49, 85, 0.13);
}
.can-table .dir-tx {
    color: var(--cyan);
}
.can-table .dir-rx {
    color: var(--accent);
}
.can-table .id-col {
    color: var(--text-bright);
}
.can-table .decoded {
    color: var(--accent);
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.can-filter {
    padding: 6px 10px;
    border-radius: 3px;
    border: 1px solid var(--card-border);
    background: var(--bg);
    color: var(--text);
    font-size: 12px;
    font-family: "JetBrains Mono", monospace;
    flex: 1 1 200px;
}

.can-nav {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
    align-items: center;
}

/* Register buttons */
.reg-btn {
    padding: 4px 10px;
    border-radius: 3px;
    font-size: 11px;
    cursor: pointer;
    font-family: "JetBrains Mono", monospace;
    border: 1px solid var(--card-border);
    background: transparent;
    color: var(--text-dim);
    transition: all 0.15s;
}
.reg-btn.active {
    border-color: var(--accent);
    background: rgba(78, 189, 107, 0.08);
    color: var(--accent);
}

/* Drop zone */
.drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 70vh;
    gap: 16px;
}
.drop-icon {
    width: 80px;
    height: 80px;
    border-radius: 8px;
    border: 2px dashed var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--text-dim);
}
.drop-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-bright);
}
.drop-desc {
    font-size: 12px;
    color: var(--text-dim);
    max-width: 360px;
    text-align: center;
    line-height: 1.6;
}

/* Footer */
.footer {
    padding: 12px 24px;
    border-top: 1px solid var(--card-border);
    font-size: 10px;
    color: var(--text-dim);
    text-align: center;
}
.footer .gold {
    color: var(--gold);
}
.footer .green {
    color: var(--accent);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    width: 100%;
    max-width: 620px;
    max-height: 72vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.logs-list {
    overflow-y: auto;
    padding: 12px;
    flex: 1;
}

.log-entry {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 4px;
    border: 1px solid var(--card-border);
    margin-bottom: 8px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}
.log-entry:hover {
    border-color: var(--accent);
    background: rgba(78, 189, 107, 0.05);
}

.log-name {
    font-size: 12px;
    color: var(--text-bright);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.log-meta {
    font-size: 10px;
    color: var(--text-dim);
    white-space: nowrap;
}

/* Upload status */
.upload-status {
    font-size: 11px;
    color: var(--text-dim);
    padding: 3px 10px;
    border-radius: 3px;
    background: rgba(78, 189, 107, 0.07);
    border: 1px solid var(--card-border);
    display: none;
}
.upload-status.visible {
    display: inline-block;
}
.upload-status.error {
    color: var(--red);
    background: rgba(239, 68, 68, 0.07);
    border-color: rgba(239, 68, 68, 0.25);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg);
}
::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: 3px;
}

/* Alert card */
.alert {
    background: rgba(239, 68, 68, 0.06);
    border: 1px solid rgba(239, 68, 68, 0.2);
}
.alert .card-title {
    color: var(--red);
}

.flex-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.flex-row {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

/* Floating video player */
#floatingVideo {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 300px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    z-index: 50;
    overflow: hidden;
    user-select: none;
}
#floatingVideoHeader {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background: #0d1a30;
    border-bottom: 1px solid var(--card-border);
    cursor: move;
}
.floating-label {
    font-size: 10px;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
#floatingVideoTime {
    font-size: 11px;
    color: var(--text-dim);
    flex: 1;
}
#floatingVideoGoTo {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 10px;
    font-family: "JetBrains Mono", monospace;
    padding: 2px 5px;
    border-radius: 3px;
    border: 1px solid var(--card-border);
    transition: color 0.15s;
}
#floatingVideoGoTo:hover {
    color: var(--text-bright);
    border-color: var(--accent);
}
#floatingVideoBody video {
    width: 100%;
    display: block;
    background: #000;
    max-height: 168px;
}

/* Video tab */
.video-drop-zone {
    border: 2px dashed var(--card-border);
    border-radius: 6px;
    padding: 28px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}
.video-drop-zone.dz-hover,
.video-drop-zone:hover {
    border-color: var(--accent);
    background: rgba(78, 189, 107, 0.04);
}
.sync-row {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    flex-wrap: wrap;
}
.sync-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.sync-label {
    font-size: 10px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.sync-input {
    padding: 6px 10px;
    border-radius: 3px;
    border: 1px solid var(--card-border);
    background: var(--bg);
    color: var(--text-bright);
    font-family: "JetBrains Mono", monospace;
    font-size: 13px;
    width: 120px;
}
.sync-input:focus {
    outline: none;
    border-color: var(--accent);
}

/* Time window slider */
.time-slider-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 7px 24px;
    border-bottom: 1px solid var(--card-border);
    background: #0d1a30;
}
.slider-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    white-space: nowrap;
}
.slider-val {
    font-size: 11px;
    color: var(--accent);
    white-space: nowrap;
    min-width: 46px;
    text-align: center;
}
.dual-range {
    flex: 1;
    position: relative;
    height: 20px;
    min-width: 80px;
}
.dual-range-track {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    height: 3px;
    background: var(--card-border);
    border-radius: 2px;
    pointer-events: none;
}
.dual-range-fill {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
    pointer-events: none;
    left: 0;
    right: 0;
}
.dual-range-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    background: transparent;
    -webkit-appearance: none;
    appearance: none;
    pointer-events: none;
    outline: none;
}
.dual-range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    pointer-events: all;
    border: 2px solid var(--bg);
    box-shadow: 0 0 6px rgba(78, 189, 107, 0.4);
}
.dual-range-input::-moz-range-thumb {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    pointer-events: all;
    border: 2px solid var(--bg);
    box-shadow: none;
}
.dual-range-input::-webkit-slider-runnable-track {
    background: transparent;
}
.dual-range-input::-moz-range-track {
    background: transparent;
}

@media (max-width: 640px) {
    .header {
        padding: 10px 14px;
    }
    .content {
        padding: 10px 14px;
    }
    .tab-btn {
        padding: 8px 12px;
        font-size: 11px;
    }
}