:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --danger: #f85149;
    --warning: #d29922;
    --success: #238636;
    --border: #30363d;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Pretendard", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    padding: 20px;
}

header {
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 { font-size: 1.8rem; font-weight: 600; }
h2 { font-size: 1.4rem; color: var(--accent); margin-bottom: 15px; }
h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--text-secondary); }

#session-info {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--warning);
    background-color: rgba(210, 153, 34, 0.1);
    padding: 5px 10px;
    border-radius: 6px;
    border: 1px solid var(--warning);
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 25px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.hidden { display: none !important; }
.row { display: flex; gap: 20px; flex-wrap: wrap; }
.col { flex: 1; min-width: 300px; }

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}
.upload-area:hover, .upload-area.dragover {
    border-color: var(--accent);
    background-color: rgba(88, 166, 255, 0.05);
}

/* Forms & Buttons */
label {
    display: block;
    margin-bottom: 15px;
    font-size: 0.95rem;
}
select, input[type="number"] {
    display: block;
    width: 100%;
    margin-top: 5px;
    padding: 8px 12px;
    background-color: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
}
button {
    background-color: var(--border);
    color: var(--text-primary);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s;
    width: 100%;
    margin-top: 10px;
}
button:hover:not(:disabled) {
    background-color: #444c56;
}
button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
button.primary-btn {
    background-color: var(--success);
    border-color: rgba(240, 246, 252, 0.1);
}
button.primary-btn:hover:not(:disabled) { background-color: #2ea043; }

button.btn-small { padding: 5px 10px; font-size: 0.85rem; width: auto; display: inline-block; }

/* Timeline Chart */
.timeline-container {
    width: 100%;
    background: var(--bg-color);
    border-radius: 8px;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}
.timeline-container img {
    width: 100%;
    height: auto;
    display: block;
}

.action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 15px;
}

/* Canvas & ROI */
.canvas-wrapper {
    position: relative;
    max-width: 100%;
    overflow: hidden;
    background: #000;
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 15px;
}
canvas {
    display: block;
    max-width: 100%;
    height: auto;
    cursor: crosshair;
}
.roi-controls { display: flex; justify-content: space-between; align-items: center; }

/* Review Panel & Viewers */
.viewer-controls { margin-bottom: 20px; }
.viewer-btn {
    width: auto;
    padding: 6px 12px;
    margin-right: 10px;
    background-color: var(--bg-color);
    border-radius: 20px;
}
.viewer-btn.active {
    background-color: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* Candidate Card Layout */
.candidate-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 30px;
    overflow: hidden;
    display: flex;
    flex-wrap: wrap;
    background-color: var(--bg-color);
}
.candidate-viewer {
    flex: 2;
    min-width: 400px;
    background: #000;
    position: relative;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.candidate-info {
    flex: 1;
    min-width: 250px;
    padding: 20px;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.metric-row { display: flex; justify-content: space-between; margin-bottom: 15px; font-family: 'JetBrains Mono', monospace; font-size: 0.9rem;}
.metric-value { color: var(--accent); font-weight: bold; }

/* Verdict Buttons */
.verdict-btn { flex: 1; padding: 12px; font-size: 1.1rem; }
.verdict-btn.btn-true { border-color: var(--success); color: var(--success); }
.verdict-btn.btn-true:hover, .verdict-btn.btn-true.selected { background-color: rgba(35, 134, 54, 0.2); }
.verdict-btn.btn-false { border-color: var(--danger); color: var(--danger); }
.verdict-btn.btn-false:hover, .verdict-btn.btn-false.selected { background-color: rgba(248, 81, 73, 0.2); }
.verdict-row { display: flex; gap: 10px; margin-bottom: 15px; }
.note-input { width: 100%; background: var(--card-bg); border: 1px solid var(--border); color: #fff; padding: 10px; border-radius: 6px; }

/* Swipe Viewer Implementation */
.swipe-container {
    position: relative;
    width: 100%;
    height: auto;
    overflow: hidden;
}
.swipe-container img {
    display: block;
    width: 100%;
    height: auto;
}
.swipe-img-after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    clip-path: polygon(50% 0, 100% 0, 100% 100%, 50% 100%);
    z-index: 1;
}
.swipe-slider {
    position: absolute;
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 100%;
    background: transparent;
    outline: none;
    margin: 0;
    top: 0;
    left: 0;
    z-index: 2;
}
.swipe-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 4px;
    height: 1000px; /* enough to cover height */
    background: var(--accent);
    cursor: ew-resize;
    box-shadow: 0 0 10px rgba(0,0,0,0.8);
}
/* Flicker target */
.flicker-layer {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 1;
    transition: opacity 0.1s ease-in-out;
}
.mt-20 { margin-top: 20px; }