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

:root {
    --bg:      #1c1c1c;
    --bg2:     #252525;
    --bg3:     #2e2e2e;
    --bg4:     #383838;
    --border:  #3a3a3a;
    --border2: #484848;
    --accent:  #4e9fd4;
    --text:    #d4d4d4;
    --muted:   #6a6a6a;
    --warn:    #c8963c;
    --sans:    Helvetica Neue, Helvetica, Arial, sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 400;
    min-height: 100vh;
    padding: 36px 20px 60px;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 960px; margin: 0 auto; }

header {
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
}

.app-name {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

h1 {
    font-size: 20px;
    font-weight: 300;
    color: #e8e8e8;
    letter-spacing: 0.01em;
}

h1 strong { font-weight: 500; }

.subtitle {
    margin-top: 6px;
    font-size: 11px;
    color: var(--muted);
    line-height: 1.6;
}

/* Layout */
.top-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 2px;
}

@media (max-width: 640px) { .top-grid { grid-template-columns: 1fr; } }

.panel {
    background: var(--bg2);
    padding: 18px 20px;
}

.panel-title {
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

label {
    display: block;
    font-size: 11px;
    color: var(--muted);
    margin-bottom: 5px;
    letter-spacing: 0.01em;
}

select {
    width: 100%;
    background: var(--bg3);
    border: 1px solid var(--border2);
    border-radius: 3px;
    color: var(--text);
    font-family: var(--sans);
    font-size: 13px;
    padding: 7px 9px;
    outline: none;
    cursor: pointer;
    transition: border-color 0.1s;
    -webkit-appearance: none;
}
select:focus { border-color: var(--accent); }
select option { background: #2e2e2e; }

.slider-wrap { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }

input[type=range] {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 3px;
    background: var(--bg4);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg2);
    cursor: pointer;
}
input[type=range]:hover::-webkit-slider-thumb { background: #6ab8e0; }
input[type=range]::-moz-range-thumb {
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg2);
    cursor: pointer;
}

.slider-val {
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    min-width: 54px;
    text-align: right;
}

.slider-hint {
    font-size: 10px;
    color: var(--muted);
    line-height: 1.5;
}

/* Metrics row */
.metrics {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 2px;
}
@media (max-width: 640px) { .metrics { grid-template-columns: repeat(3, 1fr); } }

.metric {
    background: var(--bg2);
    padding: 14px 16px 12px;
    border-top: 2px solid var(--border);
}
.metric.hi { border-top-color: var(--accent); }

.metric-label {
    font-size: 9px;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}
.metric-value {
    font-size: 20px;
    font-weight: 300;
    color: var(--text);
    line-height: 1;
    letter-spacing: -0.01em;
}
.metric.hi .metric-value { color: var(--accent); font-weight: 400; }
.metric-sub { font-size: 10px; color: var(--muted); margin-top: 5px; }

/* Main content area */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 2px;
}
@media (max-width: 700px) { .content-grid { grid-template-columns: 1fr; } }

/* Visual */
.visual-panel {
    background: var(--bg2);
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
}

.visual-stage {
    flex: 1;
    background: #141414;
    border: 1px solid var(--border);
    border-radius: 3px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    overflow: hidden;
}

#ref35 {
    position: absolute;
    border: 1px solid rgba(200,100,100,0.4);
    box-sizing: border-box;
    background: rgba(200,100,100,0.04);
}

#currentFrame {
    position: absolute;
    border: 1.5px solid var(--accent);
    box-sizing: border-box;
    background: rgba(78,159,212,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
}

#lensCircle {
    position: absolute;
    border: 1px dashed rgba(180,140,200,0.4);
    border-radius: 50%;
    pointer-events: none;
}

.visual-legend {
    display: flex;
    gap: 16px;
    margin-top: 10px;
    flex-wrap: wrap;
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    color: var(--muted);
}
.legend-swatch {
    width: 18px; height: 2px;
    flex-shrink: 0;
}

/* Info table */
.info-panel {
    background: var(--bg2);
    padding: 18px 20px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
    margin-top: 4px;
}
th {
    background: var(--bg3);
    color: var(--muted);
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    padding: 7px 10px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
td {
    padding: 7px 10px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    line-height: 1.4;
    vertical-align: top;
}
tr:last-child td { border-bottom: none; }
td:first-child { color: var(--muted); }

.note-panel {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-left: 2px solid var(--accent);
    border-radius: 4px;
    padding: 14px 18px;
    font-size: 11px;
    line-height: 1.7;
    color: var(--muted);
}
.note-panel strong { color: var(--text); font-weight: 500; }

footer {
    margin-top: 28px;
    text-align: center;
    font-size: 10px;
    color: #4a4a4a;
    letter-spacing: 0.06em;
}