.functions {
    padding: var(--section-padding-y) var(--section-padding-x);
    max-width: 1440px;
    margin: 0 auto;
    background: var(--color-bg-page);
}

.functions__heading {
    font-size: var(--fs-h2);
    line-height: var(--lh-h2);
    color: var(--color-text-primary);
    margin-bottom: 60px;
    letter-spacing: -0.01em;
}

.functions__content--desktop {
    display: flex;
    gap: 60px;
}

.functions__content--stack {
    display: none;
    flex-direction: column;
    gap: 0;
}

.functions__accordion-item--open {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    overflow: hidden;
    margin-bottom: 16px;
}

.functions__accordion-item--open:last-child {
    margin-bottom: 0;
}

.functions__accordion-trigger {
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    border: none;
    background: transparent;
    font: inherit;
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    color: var(--color-text-primary);
    transition: background var(--transition-fast);
}

.functions__accordion-trigger-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
}

.functions__accordion-item--open .functions__accordion-trigger {
    background: var(--gradient-diagonal);
    color: var(--color-white);
    border-radius: 0;
}

.functions__accordion-item--open .functions__accordion-trigger img {
    filter: brightness(0) invert(1);
}

.functions__accordion-item:not(.functions__accordion-item--open) .functions__accordion-trigger:hover {
    background: rgba(0, 206, 209, 0.05);
}

.functions__accordion-item:not(.functions__accordion-item--open) .functions__accordion-trigger {
    border-bottom: 1px solid var(--color-border);
}

.functions__accordion-trigger:focus-visible {
    outline: 2px solid var(--color-dark-turquoise);
    outline-offset: 2px;
}

.functions__accordion-item:not(.functions__accordion-item--open) .functions__accordion-trigger-inner {
    padding: 16px 0;
}

.functions__accordion-item:not(.functions__accordion-item--open):last-child .functions__accordion-trigger {
    border-bottom: none;
}

.functions__accordion-trigger-label {
    font-size: 18px;
    font-weight: var(--fw-medium);
    line-height: 1.21;
}

.functions__accordion-item--open .functions__accordion-trigger-label {
    color: var(--color-white);
}

.functions__accordion-panel-inner {
    padding: 24px 16px;
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
}

.functions__accordion-panel-title {
    font-size: var(--fs-h3);
    line-height: 1.465;
    font-weight: var(--fw-bold);
    color: var(--color-black);
    margin: 0 0 20px;
}

.functions__tabs {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex-shrink: 0;
}

.functions__tab {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    font-size: var(--fs-body-lg);
    font-weight: var(--fw-medium);
    color: var(--color-text-primary);
    cursor: pointer;
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-fast);
    line-height: 1.21;
}

.functions__tab img {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.functions__tab:hover {
    background: rgba(0, 206, 209, 0.05);
}

.functions__tab--active {
    background: var(--gradient-diagonal);
    color: var(--color-white);
    border-bottom-color: transparent;
}

.functions__tab--active img {
    filter: brightness(0) invert(1);
}

.functions__panels {
    flex: 1;
}

.functions__panel {
    display: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 32px;
}

.functions__panel--active {
    display: block;
}

.functions__panel-title {
    font-size: var(--fs-h3);
    line-height: 1.465;
    font-weight: var(--fw-medium);
    color: var(--color-black);
    margin-bottom: 24px;
}

.functions__feature-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.functions__feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    font-size: var(--fs-body);
    font-weight: var(--fw-medium);
    line-height: 1.5;
    color: var(--color-text-primary);
}

.functions__feature-list li img {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    margin-top: 0;
}