:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --accent: #10b981;
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    padding: 40px 20px;
    margin: 0;
}

.container {
    max-width: 650px;
    width: 100%;
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
}

h1 { margin-top: 0; color: var(--accent); }
.description { color: var(--text-dim); line-height: 1.6; }

.settings { margin: 25px 0; text-align: left; }
.input-group input {
    background: #0f172a;
    border: 1px solid #334155;
    color: white;
    padding: 8px;
    border-radius: 5px;
    margin-left: 10px;
}

.track-area {
    height: 200px;
    border: 2px dashed #334155;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: crosshair;
    transition: all 0.3s ease;
    margin-bottom: 30px;
}

.track-area:hover { border-color: var(--accent); }
.track-area.active { background: rgba(16, 185, 129, 0.05); border-color: var(--accent); }

#status-badge {
    background: #334155;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-top: 10px;
}

.results-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: #0f172a;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
}

.card.highlight { border: 1px solid var(--accent); }
.label { color: var(--text-dim); font-size: 0.85rem; display: block; margin-bottom: 5px; }
.value { font-size: 1.8rem; font-weight: bold; }
.value small { font-size: 0.9rem; color: var(--text-dim); }

.btn-reset {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: none;
    background: #ef4444;
    color: white;
    font-weight: bold;
    cursor: pointer;
}

.guide-section {
    text-align: left;
    margin-top: 30px;
    border-top: 1px solid #334155;
    padding-top: 20px;
}

.guide-section ul { padding-left: 20px; color: var(--text-dim); }