/* Dark Theme Variables */
:root {
    --cp-bg-color: #0d0d0d;
    --cp-card-bg: #1a1a1a;
    --cp-text-color: #ffffff;
    --cp-accent-green: #e1ffc7;
    --cp-accent-blue: #c7e8ff;
    --cp-accent-yellow: #fff3c4;
    --cp-accent-purple: #e0c7ff;
    --cp-border-color: #333;
    --cp-time-border: #444;
}

.cp-program-container {
    background-color: var(--cp-bg-color);
    color: var(--cp-text-color);
    padding: 20px;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
}

.cp-program-header {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2em;
    font-weight: bold;
    color: #ccffaa;
    /* Light Green title */
}

/* Filters */
.cp-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 30px;
}

.cp-filter-btn {
    background: transparent;
    border: 1px solid var(--cp-border-color);
    color: var(--cp-text-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9em;
}

.cp-filter-btn:hover,
.cp-filter-btn.active {
    background-color: var(--cp-text-color);
    color: var(--cp-bg-color);
    border-color: var(--cp-text-color);
}

/* Timeline Structure */
.cp-timeline {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.cp-time-slot {
    border: 1px solid var(--cp-time-border);
    border-radius: 12px;
    padding: 20px;
    position: relative;
    padding-top: 40px;
    /* Space for absolute header */
}

.cp-time-header {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--cp-bg-color);
    padding: 0 15px;
    font-size: 1.1em;
    font-weight: bold;
    color: var(--cp-text-color);
    border: 1px solid var(--cp-time-border);
    border-radius: 20px;
}

/* Events Grid */
.cp-events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.cp-event-card {
    background-color: var(--cp-card-bg);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s;
    border: 1px solid #2a2a2a;
}

.cp-event-card:hover {
    transform: translateY(-2px);
    border-color: #444;
}

.cp-event-title {
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 10px;
    color: #e6e6e6;
}

.cp-event-speaker {
    font-size: 0.95em;
    color: #bbb;
    margin-bottom: 5px;
}

.cp-event-desc {
    font-size: 0.85em;
    color: #888;
    margin-bottom: 15px;
    flex-grow: 1;
}

/* Footer / Pills */
.cp-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.cp-pill {
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8em;
    font-weight: 600;
    color: #000;
}

.cp-pill-room {
    background-color: var(--cp-accent-blue);
}

.cp-pill-time {
    background-color: transparent;
    color: #aaa;
    border: 1px solid #444;
}

/* Specific Pill Colors based on Room? (Optional dynamic logic can be added later) */
.cp-event-card:nth-child(2n) .cp-pill-room {
    background-color: var(--cp-accent-green);
}

.cp-event-card:nth-child(3n) .cp-pill-room {
    background-color: var(--cp-accent-yellow);
}

.cp-event-card:nth-child(4n) .cp-pill-room {
    background-color: var(--cp-accent-purple);
}

/* Responsive */
@media (max-width: 600px) {
    .cp-time-header {
        font-size: 0.9em;
        width: 80%;
        text-align: center;
    }

    .cp-events-grid {
        grid-template-columns: 1fr;
    }
}