/* About 페이지 전용 스타일 */

/* 히어로 배너 */
.about-hero {
    background: linear-gradient(135deg, #FF5722, #FF8A65);
    color: white;
    padding: 36px 28px;
    border-radius: 12px;
    margin-bottom: 24px;
    text-align: center;
}
.about-hero h2 {
    font-size: 1.6rem;
    font-weight: 800;
    margin: 0 0 8px 0;
}
.about-hero > p {
    margin: 0;
    opacity: 0.92;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 히어로 통계 카운터 */
.about-stats {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}
.about-stat {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    border-radius: 10px;
    padding: 10px 18px;
    min-width: 90px;
}
.about-stat-number {
    font-size: 1.4rem;
    font-weight: 800;
    display: block;
}
.about-stat-label {
    font-size: 0.75rem;
    opacity: 0.88;
    display: block;
    margin-top: 2px;
}

/* 섹션 컨테이너 */
.about-section {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
.about-section h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 12px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.about-section h3 .material-icons {
    font-size: 22px;
    color: var(--primary-color);
}
.about-section p {
    font-size: 0.92rem;
    color: var(--text-secondary-color);
    line-height: 1.7;
    margin: 0 0 12px 0;
}
.about-section p:last-child {
    margin-bottom: 0;
}

/* 섹션 제목 (독립형) */
.about-heading {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 14px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.about-heading .material-icons {
    font-size: 20px;
    color: var(--primary-color);
}

/* 기능 카드 그리드 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}
.feature-card {
    display: block;
    background: var(--surface-color);
    border-radius: 12px;
    padding: 22px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* 기능 카드 아이콘 컨테이너 */
.feature-card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}
.feature-card-icon .material-icons {
    font-size: 28px;
    color: white;
}
.feature-card-icon--study { background: #FF5722; }
.feature-card-icon--challenge { background: #FF9800; }
.feature-card-icon--qna { background: #1565C0; }
.feature-card-icon--exam { background: #2E7D32; }
.feature-card-icon--curriculum { background: #00695C; }
.feature-card-icon--logseq { background: #6A1B9A; }
.feature-card-icon--notification { background: #C62828; }
.feature-card-icon--community { background: #00838F; }
.feature-card-icon--feedback { background: #4527A0; }

.feature-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 6px 0;
}
.feature-card p {
    font-size: 0.85rem;
    color: var(--text-muted-color);
    margin: 0;
    line-height: 1.5;
}

/* 운영 방향 리스트 */
.about-values {
    list-style: none;
    padding: 0;
    margin: 0;
}
.about-values li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.92rem;
    color: var(--text-secondary-color);
    line-height: 1.6;
}
.about-values li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}
.about-values .material-icons {
    font-size: 20px;
    color: var(--primary-color);
    margin-top: 2px;
    flex-shrink: 0;
}

/* 문의 안내 */
.about-contact {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    font-size: 0.88rem;
    color: var(--text-secondary-color);
}
.about-contact a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}
.about-contact a:hover {
    text-decoration: underline;
}
.about-contact .material-icons {
    font-size: 18px;
    color: var(--primary-color);
}

/* 후원 버튼 */
.about-support {
    text-align: center;
    margin-bottom: 24px;
}
.about-support img {
    height: 48px;
    border-radius: 8px;
    transition: transform 0.15s ease;
}
.about-support img:hover {
    transform: scale(1.05);
}

/* CTA 섹션 */
.about-cta {
    text-align: center;
    padding: 32px 24px;
    background: var(--tint-brand-bg);
    border-radius: 12px;
    margin-bottom: 20px;
}
.about-cta h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 8px 0;
}
.about-cta p {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    margin: 0 0 16px 0;
}
.about-cta-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}
.about-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s;
}
.about-cta-btn--primary {
    background: var(--primary-color);
    color: white;
}
.about-cta-btn--primary:hover {
    background: #e64a19;
}
.about-cta-btn--outline {
    background: var(--surface-color);
    color: var(--primary-color);
    border: 1.5px solid var(--primary-color);
}
.about-cta-btn--outline:hover {
    background: var(--tint-orange-bg);
}
.about-cta-btn .material-icons {
    font-size: 18px;
}

/* 반응형 */
@media (max-width: 767px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-hero {
        padding: 28px 20px;
    }
    .about-hero h2 {
        font-size: 1.35rem;
    }
    .about-stats {
        gap: 8px;
    }
    .about-stat {
        padding: 8px 14px;
        min-width: 80px;
    }
    .about-stat-number {
        font-size: 1.2rem;
    }
}

@media (max-width: 400px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}