/**
 * ST landings — DIARY cards component.
 * Selectors: .st-diary, .st-diary-grid, .st-diary-card*, .st-diary-icon-wrap, .st-diary-icon--{variant}.
 * Variants: abc / ai / progress (correspond to feature['variant'] in content file).
 */

.st-diary {
    padding: 100px 24px;
    background: linear-gradient(180deg, var(--st-white) 0%, var(--st-cream) 100%);
}

.st-diary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 56px;
}

.st-diary-card {
    background: var(--st-white);
    border-radius: 24px;
    padding: 40px 32px;
    border: 1px solid var(--st-border);
    transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
    overflow: hidden;
}

.st-diary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: 24px 24px 0 0;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.st-diary-card:nth-child(1)::before {
    background: linear-gradient(90deg, var(--st-primary), var(--st-primary-light));
}

.st-diary-card:nth-child(2)::before {
    background: linear-gradient(90deg, #7C3AED, #A78BFA);
}

.st-diary-card:nth-child(3)::before {
    background: linear-gradient(90deg, #059669, #34D399);
}

.st-diary-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    border-color: transparent;
}

.st-diary-card:hover::before {
    opacity: 1;
}

.st-diary-icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.st-diary-icon--abc {
    background: linear-gradient(135deg, var(--st-secondary) 0%, var(--st-secondary-dark) 100%);
    color: var(--st-primary-dark);
}

.st-diary-icon--ai {
    background: linear-gradient(135deg, #EDE9FE 0%, #DDD6FE 100%);
    color: #7C3AED;
}

.st-diary-icon--progress {
    background: linear-gradient(135deg, #D1FAE5 0%, #A7F3D0 100%);
    color: #059669;
}

.st-diary-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--st-text);
    margin-bottom: 12px;
    line-height: 1.3;
}

.st-diary-card p {
    font-size: 15px;
    color: var(--st-text-md);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .st-diary-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }
}