.checkout-heading {
    padding-block: 70px 55px;
    background:
        linear-gradient(
            135deg,
            var(--color-primary-light),
            var(--color-secondary-light)
        );
}

.checkout-heading__back {
    display: inline-flex;
    margin-bottom: 34px;
    color: var(--color-primary-dark);
    font-size: 0.9rem;
    font-weight: 700;
}

.checkout-heading__back:hover {
    text-decoration: underline;
}

.checkout-heading__title {
    max-width: 760px;
    font-family: var(--font-heading);
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 400;
    letter-spacing: -0.04em;
    line-height: 1;
}

.checkout-heading__description {
    max-width: 670px;
    margin-top: 22px;
    color: var(--color-text-soft);
    font-size: 1.05rem;
}

.checkout__layout {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(330px, 0.65fr);
    align-items: start;
    gap: 30px;
}

.checkout-form-card,
.checkout-summary {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-large);
    background: var(--color-surface);
    box-shadow: var(--shadow-small);
}

.checkout-form-card {
    padding: 34px;
}

.checkout-summary {
    position: sticky;
    top: 110px;
    padding: 30px;
}

.checkout-card-heading {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 30px;
}

.checkout-card-heading__number {
    display: grid;
    width: 38px;
    height: 38px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 50%;
    background: var(--color-primary-dark);
    color: white;
    font-weight: 800;
}

.checkout-card-heading h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 400;
    line-height: 1.1;
}

.checkout-card-heading p {
    margin-top: 5px;
    color: var(--color-text-soft);
    font-size: 0.85rem;
}

.checkout-form {
    display: grid;
    gap: 22px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.form-field {
    display: grid;
    gap: 8px;
}

.form-field label {
    font-size: 0.86rem;
    font-weight: 750;
}

.form-field input,
.form-field textarea,
.form-field select {
    width: 100%;
    min-height: 50px;
    padding: 13px 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);
    outline: none;
    background: var(--color-background);
    color: var(--color-text);
    transition:
        border-color var(--transition),
        box-shadow var(--transition),
        background-color var(--transition);
}

.form-field textarea {
    min-height: 96px;
    resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
    border-color: var(--color-primary-dark);
    background: var(--color-surface);
    box-shadow: 0 0 0 4px rgba(143, 174, 190, 0.14);
}

.form-field--error input,
.form-field--error textarea,
.form-field--error select {
    border-color: #b74545;
    box-shadow: 0 0 0 3px rgba(183, 69, 69, 0.1);
}

.form-field--valid input,
.form-field--valid textarea,
.form-field--valid select {
    border-color: #52835d;
}

.form-field__error {
    min-height: 16px;
    color: #a73535;
    font-size: 0.76rem;
}

.form-field__help {
    color: var(--color-text-soft);
    font-size: 0.75rem;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 11px;
    padding: 15px;
    border-radius: var(--radius-small);
    background: var(--color-surface-soft);
    color: var(--color-text-soft);
    font-size: 0.85rem;
    line-height: 1.5;
}

.form-checkbox input {
    width: 17px;
    height: 17px;
    margin-top: 2px;
    accent-color: var(--color-primary-dark);
}

.checkout-submit {
    width: fit-content;
    min-width: 280px;
    max-width: 100%;
    justify-self: center;
    min-height: 54px;
    margin-top: 2px;
}

.checkout-submit:disabled {
    cursor: wait;
    opacity: 0.7;
}

.checkout-form__notice {
    color: var(--color-text-soft);
    font-size: 0.76rem;
    text-align: center;
}

.checkout-summary__items {
    display: grid;
    gap: 17px;
}

.checkout-summary-item {
    display: grid;
    grid-template-columns: 70px minmax(0, 1fr);
    gap: 13px;
    padding-bottom: 17px;
    border-bottom: 1px solid var(--color-border);
}

.checkout-summary-item__image {
    width: 70px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-small);
    background: var(--color-surface-soft);
}

.checkout-summary-item__content {
    display: flex;
    min-width: 0;
    flex-direction: column;
}

.checkout-summary-item__category {
    color: var(--color-text-soft);
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.checkout-summary-item__name {
    margin-top: 3px;
    font-family: var(--font-heading);
    font-size: 1.13rem;
    font-weight: 400;
}

.checkout-summary-item__details {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: auto;
    padding-top: 8px;
    color: var(--color-text-soft);
    font-size: 0.8rem;
}

.checkout-summary-item__details strong {
    color: var(--color-text);
}

.checkout-summary__total {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-top: 25px;
    padding-top: 22px;
    border-top: 1px solid var(--color-border);
}

.checkout-summary__total span {
    color: var(--color-text-soft);
}

.checkout-summary__total strong {
    color: var(--color-primary-dark);
    font-size: 1.5rem;
}

.checkout-summary__notice {
    margin-top: 10px;
    color: var(--color-text-soft);
    font-size: 0.75rem;
    line-height: 1.5;
}

.checkout-summary__edit {
    width: 100%;
    margin-top: 18px;
    padding: 11px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--color-primary-dark);
    font-size: 0.82rem;
    font-weight: 750;
}

.checkout-summary__edit:hover {
    border-color: var(--color-primary-dark);
    background: var(--color-primary-light);
}

.checkout-empty {
    display: grid;
    min-height: 460px;
    place-items: center;
    align-content: center;
    text-align: center;
}

.checkout-empty[hidden] {
    display: none;
}

.checkout-empty__icon {
    display: grid;
    width: 80px;
    height: 80px;
    place-items: center;
    border-radius: 50%;
    background: var(--color-secondary-light);
    color: var(--color-secondary-dark);
    font-size: 2.2rem;
}

.checkout-empty h2 {
    margin-top: 22px;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 400;
}

.checkout-empty p {
    margin-top: 9px;
    color: var(--color-text-soft);
}

.checkout-empty .button {
    margin-top: 25px;
}

.checkout-confirmation {
    padding-block: 55px;
    text-align: center;
}

.checkout-confirmation[hidden] {
    display: none;
}

.checkout-confirmation__icon {
    display: grid;
    width: 74px;
    height: 74px;
    margin-inline: auto;
    place-items: center;
    border-radius: 50%;
    background: #e8f2e9;
    color: #46764f;
    font-size: 2rem;
    font-weight: 800;
}

.checkout-confirmation h2 {
    margin-top: 20px;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 400;
}

.checkout-confirmation p {
    max-width: 420px;
    margin: 12px auto 0;
    color: var(--color-text-soft);
}

.checkout-confirmation .button {
    margin-top: 25px;
}

.checkout-confirmation__back {
    display: block;
    margin: 14px auto 0;
    padding: 8px;
    background: transparent;
    color: var(--color-text-soft);
    font-size: 0.82rem;
    font-weight: 700;
}

.checkout-confirmation__back:hover {
    text-decoration: underline;
}

.footer {
    margin-top: 0;
}

@media (max-width: 900px) {
    .checkout__layout {
        grid-template-columns: 1fr;
    }

    .checkout-summary {
        position: static;
        grid-row: 1;
    }
}

@media (max-width: 600px) {
    .checkout-heading {
        padding-block: 55px 45px;
    }

    .checkout-form-card,
    .checkout-summary {
        padding: 22px 18px;
        border-radius: var(--radius-medium);
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .checkout-submit {
        width: 100%;
        min-width: 0;
        justify-self: stretch;
    }
}