/* ============================================================================
   Блок Чехова (раскрывающаяся секция с текстом и контактами)
   ============================================================================ */

.about-project {
    position: relative;
    margin: 0 auto 108px;
    max-width: var(--container-max-width);
    padding: 0 clamp(24px,5vw,64px);
    transition: margin-bottom var(--transition-smooth);
}

    .about-project.active {
        margin-bottom: 140px;
    }

.about-toggle {
    width: 100%;
    background: linear-gradient(145deg, rgba(26,31,41,0.6), rgba(16,21,31,0.6));
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 20px;
    padding: 20px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all var(--transition-smooth);
    margin-bottom: 0;
    color: var(--color-text-primary);
    font-family: 'Manrope', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

    .about-toggle:hover {
        background: linear-gradient(145deg, rgba(36,41,51,0.8), rgba(26,31,41,0.8));
        border-color: rgba(79,195,247,0.4);
        transform: translateY(-3px);
        box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 0 1px rgba(79,195,247,0.2);
    }

    .about-toggle:focus-visible {
        outline: 2px solid var(--color-accent-blue);
        outline-offset: 2px;
    }

.toggle-icon {
    font-size: 1.2rem;
    transition: transform var(--transition-slow-open);
}

.about-toggle.active .toggle-icon {
    transform: rotate(180deg);
}

.about-content {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    background: rgba(26,31,41,0.3);
    backdrop-filter: blur(15px);
    border-radius: 0 0 20px 20px;
    border: 1px solid rgba(255,255,255,0.08);
    border-top: none;
    margin-top: -1px;
    transition: max-height var(--transition-slow-open), opacity 1.5s var(--ease-slow-open) 0.3s, transform 1.5s var(--ease-slow-open) 0.3s;
    transform: translateY(-10px);
}

    .about-content.active {
        max-height: 90vh; /* ограничиваем высоту для мобильных */
        opacity: 1;
        transform: translateY(0);
        transition: max-height var(--transition-slow-open), opacity 1.2s var(--ease-slow-open) 0.2s, transform 1.2s var(--ease-slow-open) 0.2s;
        overflow-y: auto; /* добавляем скролл при необходимости */
    }

.about-inner {
    padding: 40px;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 1s var(--ease-slow-open) 0.4s, transform 1s var(--ease-slow-open) 0.4s;
}

.about-content.active .about-inner {
    opacity: 1;
    transform: translateY(0);
}

.about-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.about-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 15px rgba(255,204,128,0.4));
}

.about-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-accent-warm);
    text-shadow: 0 0 20px rgba(255,204,128,0.3);
}

.about-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

.chekhov-text {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    position: relative;
    padding-left: 24px;
    border-left: 3px solid rgba(255,204,128,0.3);
}

    .chekhov-text p {
        margin-bottom: 24px;
        text-indent: 1.5em;
    }

    .chekhov-text em {
        color: var(--color-text-primary);
        font-style: italic;
    }

.contacts-section {
    background: linear-gradient(145deg, rgba(10,14,20,0.7), rgba(5,9,15,0.7));
    border-radius: 20px;
    padding: 32px;
    margin-top: 48px;
    border: 1px solid rgba(255,204,128,0.2);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

    .contacts-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--color-accent-warm), transparent);
    }

.contacts-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--color-text-primary);
}

.chekhov-contact-text {
    margin-bottom: 20px;
    color: var(--color-text-secondary);
}

.email-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--color-accent-warm);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 16px 32px;
    background: linear-gradient(135deg, rgba(255,204,128,0.15), rgba(255,171,145,0.15));
    border-radius: 20px;
    border: 1px solid rgba(255,204,128,0.3);
    transition: all 0.5s var(--ease-soft);
    margin-top: 8px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(255,204,128,0.1);
    position: relative;
    overflow: hidden;
}

    .email-link:hover {
        background: linear-gradient(135deg, rgba(255,204,128,0.25), rgba(255,171,145,0.25));
        transform: translateY(-4px);
        box-shadow: 0 16px 48px rgba(255,204,128,0.2), 0 0 0 1px rgba(255,204,128,0.4);
        border-color: var(--color-accent-warm);
        color: #ffcc80;
    }

    .email-link:focus-visible {
        outline: 2px solid var(--color-accent-blue);
        outline-offset: 2px;
    }

    .email-link::after {
        content: '↗';
        opacity: 0;
        transform: translateX(-10px);
        transition: all 0.5s var(--ease-soft);
    }

    .email-link:hover::after {
        opacity: 1;
        transform: translateX(0);
    }

.chekhov-close-wrapper {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,204,128,0.1);
}

.chekhov-close-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255,204,128,0.05);
    border: 1px solid rgba(255,204,128,0.2);
    border-radius: 16px;
    padding: 12px 24px;
    color: var(--color-text-secondary);
    font-family: 'Manrope', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.5s var(--ease-soft);
    backdrop-filter: blur(8px);
}

    .chekhov-close-btn:hover {
        background: rgba(255,204,128,0.1);
        border-color: rgba(255,204,128,0.4);
        color: var(--color-accent-warm);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(255,204,128,0.1);
    }

    .chekhov-close-btn:focus-visible {
        outline: 2px solid var(--color-accent-blue);
        outline-offset: 2px;
    }

    .chekhov-close-btn .close-icon {
        font-size: 1.4rem;
        line-height: 1;
        font-weight: 300;
        transition: transform 0.5s var(--ease-soft);
    }

    .chekhov-close-btn:hover .close-icon {
        transform: scale(1.2) rotate(90deg);
    }

@media (max-width: 768px) {
    .about-project {
        margin-bottom: 60px;
    }

    .about-inner {
        padding: 24px;
    }

    .chekhov-text {
        font-size: 1rem;
        padding-left: 16px;
    }

    .contacts-section {
        padding: 24px;
    }

    .email-link {
        width: 100%;
        justify-content: center;
    }
}