/* ==========================================================================
   Запрос счёта
   ========================================================================== */

.inv-lead {
    max-width: 860px;
    margin: 0 0 36px;
}

.inv-lead__warn {
    padding: 18px 22px;
    border-left: 4px solid var(--color-accent);
    background: #fdf6ea;
    border-radius: 0 10px 10px 0;
    color: var(--color-body);
    margin-bottom: 28px;
}

.inv-lead__title {
    font-size: 1.35rem;
    margin: 0 0 16px;
}

.inv-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 14px;
}

.inv-steps li {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px 20px;
    background: var(--color-bg-alt);
    border-radius: 12px;
}

.inv-steps__n {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.inv-steps h3 {
    margin: 0 0 4px;
    font-size: 1rem;
}

.inv-steps p {
    margin: 0;
    color: var(--color-body);
    font-size: 0.94rem;
}

/* --- блоки формы --- */

.inv-block {
    padding: 28px 32px;
    margin-bottom: 22px;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background: var(--color-bg);
}

.inv-block__title {
    font-size: 1.2rem;
    margin: 0 0 6px;
}

.inv-block__desc {
    margin: 0 0 18px;
    color: var(--color-muted);
    font-size: 0.94rem;
}

/* --- вкладки курсов --- */

.inv-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.inv-tab {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 12px 20px;
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    background: var(--color-bg);
    cursor: pointer;
    text-align: left;
    transition: all 0.18s ease;
}

.inv-tab:hover {
    border-color: var(--color-primary);
}

.inv-tab.is-active {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.inv-tab__n {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-muted);
}

.inv-tab.is-active .inv-tab__n {
    color: var(--color-primary-dark);
}

.inv-tab__d {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    color: var(--color-dark);
}

.inv-tab__s {
    font-size: 0.85rem;
    color: var(--color-body);
}

.inv-course-head {
    padding: 14px 18px;
    margin-bottom: 16px;
    background: var(--color-primary-light);
    border-radius: 10px;
    font-size: 0.95rem;
    color: var(--color-secondary);
}

/* --- панель расчёта --- */

.inv-cart {
    position: sticky;
    top: 90px;
    padding: 22px;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background: var(--color-bg);
}

.inv-cart__title {
    margin: 0 0 14px;
    font-size: 1.05rem;
}

.inv-cart__course {
    padding: 12px 0;
    border-top: 1px solid var(--color-border);
}

.inv-cart__course.is-active .inv-cart__ch {
    color: var(--color-primary-dark);
}

.inv-cart__ch {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: 8px;
}

.inv-cart__list {
    list-style: none;
    margin: 0 0 10px;
    padding: 0;
    font-size: 0.86rem;
}

.inv-cart__list li {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    padding: 3px 0;
    color: var(--color-body);
}

.inv-cart__list b {
    white-space: nowrap;
    font-weight: 600;
    color: var(--color-dark);
}

.inv-cart__none {
    margin: 0 0 10px;
    font-size: 0.86rem;
    color: var(--color-muted);
}

.inv-cart__sub {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 600;
}

.inv-cart__grand {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 2px solid var(--color-primary);
}

.inv-cart__grand strong {
    font-size: 1.3rem;
    color: var(--color-primary-dark);
    font-variant-numeric: tabular-nums;
}

.inv-cart__note {
    margin: 12px 0 8px;
    font-size: 0.8rem;
    color: var(--color-muted);
}

.inv-cart__link {
    font-size: 0.85rem;
    font-weight: 600;
}

/* --- отправка --- */

.inv-submit {
    margin-top: 22px;
    text-align: center;
}

.inv-error {
    margin-bottom: 14px;
    padding: 12px 18px;
    background: #fdecec;
    border: 1px solid #f5b8b8;
    border-radius: 10px;
    color: #b32d2e;
}

.inv-done {
    max-width: 620px;
    margin: 40px auto;
    padding: 40px 32px;
    text-align: center;
    background: var(--color-bg-alt);
    border-radius: 16px;
}

.inv-done__icon {
    width: 62px;
    height: 62px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: var(--color-success);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.inv-done__icon svg {
    width: 30px;
    height: 30px;
}

.inv-done p {
    color: var(--color-body);
}

@media (max-width: 900px) {
    .inv-block {
        padding: 22px 18px;
    }

    .inv-cart {
        position: static;
        margin-top: 20px;
    }

    .inv-tab {
        flex: 1 1 140px;
    }
}

/* Количество курсов на оплату (1.10.0) */
.inv-count {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--color-border);
    max-width: 320px;
}

.inv-count input {
    max-width: 120px;
    font-variant-numeric: tabular-nums;
}