/* ========================================
   About 페이지 전용 스타일
   ======================================== */

.about-main {
    margin-top: var(--header-height);
    background: var(--color-white);
}

/* ========================================
   히어로 섹션
   ======================================== */
.about-hero {
    background: linear-gradient(135deg, #DBEAFE 0%, #BFDBFE 100%);
    padding: 100px 0 80px;
}

.about-hero__content {
    text-align: center;
    margin-bottom: 60px;
}

.about-hero__subtitle {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.about-hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-black);
    line-height: 1.2;
    margin-bottom: 24px;
}

.about-hero__desc {
    font-size: 1.2rem;
    color: var(--color-gray);
    line-height: 1.8;
}

.about-hero__image {
    display: flex;
    justify-content: center;
}

.about-hero__image-placeholder {
    width: 100%;
    max-width: 800px;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-secondary) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--color-gray);
    border: 2px solid var(--color-primary);
}

/* ========================================
   공통 섹션 스타일
   ======================================== */
.about-section {
    padding: 100px 0;
}

.about-section--gray {
    background: var(--color-light-gray);
}

.about-section__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-section__grid--reverse {
    direction: rtl;
}

.about-section__grid--reverse > * {
    direction: ltr;
}

.about-section__image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-secondary) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    color: var(--color-gray);
    border: 2px solid var(--color-primary);
}

.about-section__text {
    padding: 20px 0;
}

.about-section__title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-black);
    line-height: 1.3;
    margin-bottom: 32px;
}

.about-section__desc {
    font-size: 1.1rem;
    color: var(--color-gray);
    line-height: 1.8;
}

.about-section__desc p {
    margin-bottom: 20px;
}

.about-section__list {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.about-section__list li {
    font-size: 1.05rem;
    color: var(--color-black);
    font-weight: 500;
}

.about-section__center-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-black);
    text-align: center;
    margin-bottom: 60px;
}

/* ========================================
   4단계 학습 프로세스
   ======================================== */
.about-step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 28px;
}

.about-step:last-child {
    margin-bottom: 0;
}

.about-step__number {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 700;
    flex-shrink: 0;
}

.about-step__content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: 8px;
}

.about-step__content p {
    font-size: 1rem;
    color: var(--color-gray);
    line-height: 1.6;
}

/* ========================================
   카드 레이아웃
   ======================================== */
.about-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.about-card {
    background: var(--color-white);
    border: 2px solid var(--color-primary);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.15);
}

.about-card__icon {
    font-size: 3rem;
    margin-bottom: 24px;
}

.about-card__title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-black);
    line-height: 1.4;
    margin-bottom: 16px;
}

.about-card__desc {
    font-size: 1rem;
    color: var(--color-gray);
    line-height: 1.7;
}

/* ========================================
   CTA 섹션
   ======================================== */
.about-cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary-dark) 100%);
    padding: 80px 0;
}

.about-cta__content {
    text-align: center;
}

.about-cta__title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 20px;
}

.about-cta__desc {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    margin-bottom: 40px;
}

.about-cta__btn {
    display: inline-block;
    padding: 18px 48px;
    background: var(--color-white);
    color: var(--color-primary);
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.about-cta__btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    background: var(--color-lavender);
}

/* ========================================
   반응형 스타일
   ======================================== */

/* 태블릿 */
@media (max-width: 1024px) {
    .about-hero__title {
        font-size: 2.8rem;
    }

    .about-section__grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .about-section__grid--reverse {
        direction: ltr;
    }

    .about-section__image {
        order: -1;
    }

    .about-cards {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .about-section__title {
        font-size: 2rem;
    }

    .about-section__center-title {
        font-size: 2rem;
    }
}

/* 모바일 */
@media (max-width: 768px) {
    .about-hero {
        padding: 60px 0 50px;
    }

    .about-hero__title {
        font-size: 2rem;
    }

    .about-hero__subtitle {
        font-size: 0.9rem;
    }

    .about-hero__desc {
        font-size: 1rem;
    }

    .about-section {
        padding: 60px 0;
    }

    .about-section__title {
        font-size: 1.6rem;
        margin-bottom: 24px;
    }

    .about-section__center-title {
        font-size: 1.6rem;
        margin-bottom: 40px;
    }

    .about-section__desc {
        font-size: 1rem;
    }

    .about-step {
        gap: 16px;
        margin-bottom: 24px;
    }

    .about-step__number {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .about-step__content h3 {
        font-size: 1.1rem;
    }

    .about-step__content p {
        font-size: 0.95rem;
    }

    .about-card {
        padding: 30px 24px;
    }

    .about-card__icon {
        font-size: 2.5rem;
        margin-bottom: 20px;
    }

    .about-card__title {
        font-size: 1.15rem;
    }

    .about-card__desc {
        font-size: 0.95rem;
    }

    .about-cta {
        padding: 60px 0;
    }

    .about-cta__title {
        font-size: 1.8rem;
    }

    .about-cta__desc {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .about-cta__btn {
        padding: 16px 40px;
        font-size: 1rem;
    }
}

/* 소형 모바일 */
@media (max-width: 480px) {
    .about-hero__title {
        font-size: 1.6rem;
    }

    .about-section__title,
    .about-section__center-title {
        font-size: 1.4rem;
    }

    .about-cta__title {
        font-size: 1.5rem;
    }

    .image-placeholder {
        font-size: 0.85rem;
    }
}