.topics-section {
padding: 40px 0;
background: var(--neutral-bg);
}
.topic-card {
background: var(--card-bg);
border: 1px solid var(--border-subtle);
border-radius: 20px;
padding: 28px 20px;
text-align: center;
transition: transform var(--transition-medium) var(--ease-out-cubic),
box-shadow var(--transition-medium) var(--ease-out-cubic),
border-color var(--transition-medium) var(--ease-out-cubic);
height: 100%;
position: relative;
display: flex;
flex-direction: column;
justify-content: space-between;
box-shadow: var(--shadow-subtle);
overflow: hidden;
will-change: transform;
}
.topic-card::before {
content: '';
position: absolute;
top: 0;
left: 50%;
transform: translateX(-50%) scaleX(0);
width: 80px;
height: var(--accent-line-height);
background: var(--primary-gradient);
transition: transform var(--transition-medium) var(--ease-out-cubic);
border-radius: 0 0 4px 4px;
}
.topic-card::after {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: linear-gradient(135deg, rgba(124, 58, 237, 0.02) 0%, rgba(14, 165, 233, 0.02) 100%);
opacity: 0;
transition: opacity var(--transition-medium) var(--ease-out-cubic);
}
.topic-card:hover::before {
transform: translateX(-50%) scaleX(1);
}
.topic-card:hover::after {
opacity: 1;
}
.topic-card:hover {
transform: translateY(-3px);
box-shadow: var(--shadow-large);
border-color: var(--accent-purple);
}
.topic-card:focus-within {
transform: translateY(-3px);
box-shadow: var(--shadow-large);
border-color: var(--accent-cyan);
}
.topic-card:active {
transform: translateY(-2px);
}
.topic-icon {
font-size: clamp(1.8rem, 3.5vw, 2.4rem);
margin-bottom: var(--spacing-lg);
color: var(--accent-purple);
position: relative;
z-index: 1;
transition: all var(--transition-medium) var(--ease-out-cubic);
will-change: transform;
display: flex;
align-items: center;
justify-content: center;
width: 80px;
height: 80px;
border-radius: 50%;
background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(14, 165, 233, 0.05));
margin: 0 auto var(--spacing-lg) auto;
border: 2px solid transparent;
}
.topic-card:hover .topic-icon {
transform: scale(1.05);
color: var(--accent-cyan);
border-color: rgba(124, 58, 237, 0.2);
background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(14, 165, 233, 0.1));
}
.topic-title {
font-size: clamp(1rem, 2.8vw, 1.2rem);
font-weight: 700;
margin-bottom: 20px;
color: var(--text-primary);
position: relative;
z-index: 1;
letter-spacing: -0.01em;
line-height: 1.3;
}
.topic-description {
font-size: clamp(0.8rem, 2.2vw, 0.9rem);
color: var(--text-secondary);
line-height: 1.6;
margin-bottom: var(--spacing-lg);
flex-grow: 1;
position: relative;
z-index: 1;
}
.topic-link {
color: var(--accent-purple);
text-decoration: none;
font-weight: 600;
transition: all var(--transition-medium) var(--ease-out-cubic);
margin-top: auto;
border-bottom: 2px solid transparent;
position: relative;
z-index: 1;
display: inline-flex;
align-items: center;
justify-content: center;
gap: var(--spacing-sm);
font-size: clamp(0.85rem, 2.2vw, 0.95rem);
align-self: center;
padding: var(--spacing-sm) var(--spacing-md);
border-radius: var(--border-radius-md);
background: rgba(124, 58, 237, 0.05);
border: 1px solid rgba(124, 58, 237, 0.2);
min-height: 44px;
}
.topic-link:hover {
color: white;
background: var(--accent-purple);
border-color: var(--accent-purple);
transform: translateY(-2px);
text-decoration: none;
box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}
.topic-link:active {
transform: translateY(0);
}
.topic-link:focus-visible {
outline: 3px solid var(--accent-cyan);
outline-offset: 3px;
border-radius: var(--border-radius-sm);
}
.topic-link i {
transition: transform var(--transition-medium) var(--ease-out-cubic);
}
.topic-link:hover i {
transform: translateX(4px);
}
.topic-meta {
display: flex;
align-items: center;
justify-content: center;
gap: var(--spacing-sm);
margin-bottom: var(--spacing-md);
font-size: 0.8rem;
color: var(--text-muted);
}
.topic-level {
background: var(--subtle-bg);
padding: 2px 8px;
border-radius: var(--border-radius-sm);
border: 1px solid var(--border-subtle);
font-weight: 500;
}
.topic-duration {
display: flex;
align-items: center;
gap: 4px;
}
.section-title {
font-size: clamp(1.6rem, 3.5vw, 2rem);
font-weight: 800;
text-align: center;
margin-bottom: 40px;
position: relative;
color: var(--text-primary);
letter-spacing: -0.02em;
}
.section-title::after {
content: '';
position: absolute;
bottom: -16px;
left: 50%;
transform: translateX(-50%);
width: 100px;
height: 4px;
background: var(--primary-gradient);
border-radius: 2px;
}
@media (max-width: 1200px) {
.topic-card {
padding: 24px 18px;
}
.topic-icon {
width: 70px;
height: 70px;
font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}
.topic-meta {
font-size: 0.75rem;
}
}
@media (max-width: 992px) {
.topics-section {
padding: 80px 0;
}
.topic-card {
margin-bottom: var(--spacing-lg);
padding: 20px 16px;
}
.topic-icon {
width: 60px;
height: 60px;
font-size: clamp(1.4rem, 3.5vw, 1.8rem);
}
.topic-description {
font-size: 0.85rem;
}
}
@media (max-width: 768px) {
.topics-section {
padding: 60px 0;
}
.topic-card {
padding: var(--spacing-xl) var(--spacing-lg);
}
.topic-icon {
width: 64px;
height: 64px;
font-size: 2rem;
}
.topic-link:hover {
transform: translateY(0) scale(1.02);
}
.topic-meta {
flex-direction: column;
gap: var(--spacing-xs);
}
}
@media (max-width: 576px) {
.topics-section {
padding: 48px 0;
}
.topic-card {
padding: var(--spacing-lg);
}
.topic-icon {
width: 56px;
height: 56px;
font-size: 1.8rem;
margin-bottom: var(--spacing-md);
}
.topic-description {
margin-bottom: var(--spacing-md);
}
}
@media print {
.topic-card {
box-shadow: none;
border: 1px solid #666;
page-break-inside: avoid;
margin-bottom: 20px;
}
.topic-link {
background: var(--accent-purple);
color: white;
}
}
@media (prefers-contrast: high) {
.topic-card {
border: 2px solid var(--border-subtle);
}
.topic-link {
border: 2px solid var(--accent-purple);
}
.topic-level {
border: 2px solid var(--border-subtle);
font-weight: 700;
}
}
@media (prefers-reduced-motion: reduce) {
.topic-card, .topic-icon, .topic-link, .topic-link i {
transition: none !important;
animation: none !important;
}
.topic-card:hover, .topic-icon, .topic-link:hover {
transform: none !important;
}
}
@supports (container-type: inline-size) {
.topic-card {
container-type: inline-size;
}
@container (max-width: 300px) {
.topic-icon {
font-size: 1.5rem;
width: 48px;
height: 48px;
}
.topic-title {
font-size: 1rem;
}
.topic-description {
font-size: 0.8rem;
}
.topic-link {
font-size: 0.85rem;
padding: var(--spacing-xs) var(--spacing-sm);
}
}
@container (max-width: 250px) {
.topic-card {
padding: var(--spacing-md);
}
.topic-meta {
font-size: 0.7rem;
}
}
}