:root {
    --bg-dark: #0f172a;
    --bg-light: #1e293b;
    --primary: #38bdf8;
    --primary-light: #7dd3fc;
    --text-light: #f8fafc;
    --text-dark: #0f172a;
    --green: #22c55e;
    --red: #ef4444;
    --yellow: #facc15;
    --purple: #a78bfa;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    gap: 25px;
}

header { text-align: center; }

h1 {
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 5px;
}

header p { margin-top: 0; color: var(--primary-light); }

.card {
    background: var(--bg-light);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.controls {
    display: grid;
    gap: 15px;
    grid-template-columns: 1fr 1fr;
}

.controls input {
    padding: 10px;
    border-radius: 8px;
    border: 2px solid transparent;
    background-color: #334155;
    color: var(--text-light);
    font-size: 16px;
    grid-column: 1 / -1;
    transition: border-color 0.3s;
}
.controls input:focus { outline: none; border-color: var(--primary); }

.button-group {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

button {
    background-color: var(--primary);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    color: var(--text-dark);
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

button:hover:not(:disabled) {
    background-color: var(--primary-light);
    transform: translateY(-2px);
}

button:disabled { background-color: #475569; cursor: not-allowed; }

button.secondary { background-color: #475569; color: var(--text-light); }
button.secondary:hover:not(:disabled) { background-color: #64748b; }

button.analysis { background-color: var(--purple); color: var(--text-light); }
button.analysis:hover:not(:disabled) { background-color: #c084fc; }


.speed-control {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.speed-control input[type="range"] { width: 200px; }

h2 {
    color: var(--primary-light);
    margin-top: 0;
    border-bottom: 1px solid #334155;
    padding-bottom: 10px;
}

.status-bar {
    font-size: 1.2em;
    font-weight: 600;
    text-align: center;
    margin-bottom: 20px;
    min-height: 30px;
}

.status-bar span { margin: 0 15px; }
.status-bar .faults { color: var(--red); }
.status-bar .hits { color: var(--green); }

.frame-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    min-height: 80px;
    padding: 10px;
    background: #0f172a;
    border-radius: 8px;
}

.frame {
    background-color: var(--bg-light);
    border: 2px solid var(--primary);
    border-radius: 10px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: bold;
    transition: all 0.4s ease;
}

.frame.hit {
    background-color: var(--green);
    color: var(--text-dark);
    transform: scale(1.15);
    border-color: #fff;
}

.frame.fault { background-color: var(--red); animation: shake 0.5s; }

@keyframes shake {
    0%, 100% { transform: translateX(0); } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); }
}

#log {
    margin-top: 20px; font-family: 'Courier New', monospace; font-size: 0.95em;
    white-space: pre-wrap; text-align: left; background: #0f172a;
    padding: 15px; border-radius: 8px; min-height: 150px;
    max-height: 300px; overflow-y: auto;
}

#log .log-entry { padding: 2px 0; }

#comparisonResult table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
#comparisonResult th, #comparisonResult td {
    padding: 12px;
    text-align: center;
    border: 1px solid #334155;
}
#comparisonResult th { background-color: #334155; }
#comparisonResult tr.best { background-color: #166534; font-weight: bold; }

#timelineContainer { overflow-x: auto; padding: 10px; background: #0f172a; border-radius: 8px; }
.timeline-table { border-collapse: collapse; white-space: nowrap; margin: 10px 0; }
.timeline-table th, .timeline-table td {
    border: 1px solid #334155;
    padding: 8px;
    width: 40px;
    height: 40px;
    text-align: center;
    font-family: 'Courier New', monospace;
}
.timeline-table th { background-color: #334155; }
.timeline-table td.header { background-color: #334155; font-weight: bold; }
.timeline-table td.fault { background-color: var(--red); color: var(--text-light); }
.timeline-table td.hit { background-color: var(--green); color: var(--text-dark); }
.timeline-table td.stale { color: #64748b; }

details { background: var(--bg-dark); border-radius: 8px; margin-bottom: 10px; border: 1px solid #334155; }
summary { padding: 15px; font-weight: 600; cursor: pointer; color: var(--primary-light); }
.concept-content { padding: 0 20px 20px 20px; text-align: left; line-height: 1.6; }
.concept-content strong { color: var(--primary); }