/* Body & Background */
body {
    background-color: var(--bs-body-bg);
    background-image: radial-gradient(circle, var(--bs-secondary-bg) 1px, transparent 1px);
    background-size: 24px 24px;
}

.content-wrapper {
    background: transparent;
}

/* Header & Footer */
.site-header,
.site-footer {
    background-color: var(--bs-tertiary-bg);
}

.site-header {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.site-footer {
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    position: relative;
    margin-bottom: 0;
}

.timeline-item .card {
    border: 1px solid var(--bs-border-color);
    background-color: var(--bs-body-bg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.timeline-connector {
    display: flex;
    justify-content: center;
    padding: 1rem 0;
}

.timeline-connector::before {
    content: '';
    width: 6px;
    height: 4rem;
    background-color: var(--bs-border-color);
    border-radius: 3px;
}

/* Alert */
.alert-timeline {
    max-width: 800px;
}

/* Theme Toggle */
#theme-toggle {
    padding: 0.5rem 1rem;
}

/* Option Cards */
.option-card {
    display: flex;
    background-color: var(--bs-tertiary-bg);
    border: 1px solid var(--bs-border-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    cursor: pointer;
    position: relative;
}

.option-card:hover {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 1px var(--bs-primary);
}

.option-card:has(input:checked) {
    border-color: var(--bs-success);
    background-color: rgba(var(--bs-success-rgb), 0.1);
}

.option-icon img {
    object-fit: contain;
    background-color: var(--bs-body-bg);
    padding: 4px;
}

.placeholder-icon {
    width: 48px;
    height: 48px;
    background-color: var(--bs-secondary-bg);
    color: var(--bs-secondary-color);
}

.option-label {
    line-height: 1.3;
}

.option-description {
    line-height: 1.4;
}

.option-check-indicator {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bs-border-color);
    color: transparent;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.option-card:has(input:checked) .option-check-indicator {
    background-color: var(--bs-success);
    color: white;
}