* {
    box-sizing: border-box;
}

body,
html {
    margin: 0;
    padding: 0;
    font-family: "Poppins", sans-serif;
    background-color: #FDF6F0;
    color: #4A3E3D;
}

.tu-container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
}

/* header */
.tu-header {
    background-color: #FFF8E1;
    box-shadow: 0 2px 12px rgba(74, 62, 61, .08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.tu-header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
}

.tu-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #4A3E3D;
    font-weight: 700;
    font-size: 18px;
}

.tu-logo img {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: contain;
}

.tu-back {
    text-decoration: none;
    color: #4A3E3D;
    font-size: 14px;
    font-weight: 600;
    background-color: #F8BBD0;
    padding: 10px 18px;
    border-radius: 30px;
    transition: background-color .2s ease;
}

.tu-back:hover {
    background-color: #f3a4c2;
}

/* title */
.tu-builder {
    padding: 50px 0 90px;
}

.tu-title {
    text-align: center;
    font-family: "Birthstone", cursive;
    font-weight: 400;
    font-size: 56px;
    margin: 0 0 4px;
    color: #4A3E3D;
}

.tu-title span {
    color: #F4879C;
}

.tu-lead {
    text-align: center;
    color: #8a7570;
    margin: 0 0 40px;
    font-size: 15px;
}

/* layout */
.tu-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 40px;
    align-items: start;
}

/* preview */
.tu-preview-wrap {
    position: sticky;
    top: 90px;
}

.tu-preview {
    background: linear-gradient(180deg, #FFF8E1, #FDF6F0);
    border: 1px solid #f3e3d3;
    border-radius: 20px;
    padding: 30px 20px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 340px;
}

.tu-plate {
    width: 220px;
    height: 24px;
    background: #ffffff;
    border-radius: 50%;
    box-shadow: 0 10px 18px rgba(74, 62, 61, .18);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    position: relative;
    margin-top: auto;
}

.tu-cake {
    position: absolute;
    bottom: 18px;
    display: flex;
    flex-direction: column-reverse;
    align-items: center;
}

.tu-tier {
    border: 2px solid rgba(74, 62, 61, .15);
    transition: all .25s ease;
    position: relative;
}

.tu-tier .tu-toppings {
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 6px;
}

.tu-topping-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1.5px solid #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
}

.tu-plaque {
    margin-top: 16px;
    font-family: "Birthstone", cursive;
    font-size: 22px;
    color: #4A3E3D;
    min-height: 28px;
    text-align: center;
}

.tu-price-box {
    margin-top: 20px;
    background-color: #4A3E3D;
    color: #FFF8E1;
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.tu-price-box strong {
    font-size: 20px;
    color: #F8BBD0;
}

/* steps / accordion */
.tu-steps {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.tu-step {
    background-color: #ffffff;
    border: 1px solid #f3e3d3;
    border-radius: 16px;
    overflow: hidden;
}

.tu-step__head {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    padding: 18px 22px;
    font-size: 16px;
    font-weight: 600;
    color: #4A3E3D;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.tu-step__head i {
    font-style: normal;
    color: #F4879C;
    font-size: 20px;
    transition: transform .2s ease;
}

.tu-step.is-open .tu-step__head i {
    transform: rotate(45deg);
}

.tu-step__body {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease, padding .3s ease;
    padding: 0 22px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tu-step.is-open .tu-step__body {
    max-height: 600px;
    padding: 0 22px 22px;
}

.tu-field p {
    margin: 0 0 8px;
    font-size: 13px;
    font-weight: 600;
    color: #8a7570;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.tu-chips {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tu-chip {
    border: 1.5px solid #f0dfce;
    background-color: #FDF6F0;
    color: #4A3E3D;
    padding: 10px 16px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all .2s ease;
}

.tu-chip:hover {
    border-color: #F8BBD0;
}

.tu-chip.is-active {
    background-color: #F8BBD0;
    border-color: #F8BBD0;
    color: #4A3E3D;
    font-weight: 700;
}

.tu-swatches {
    display: flex;
    gap: 12px;
}

.tu-swatch {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    box-shadow: 0 0 0 1px #f0dfce;
}

.tu-swatch.is-active {
    border-color: #4A3E3D;
}

.tu-input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1.5px solid #f0dfce;
    font-family: "Poppins", sans-serif;
    font-size: 14px;
    resize: vertical;
}

.tu-input:focus {
    outline: none;
    border-color: #F8BBD0;
}

.tu-submit {
    margin-top: 4px;
    padding: 14px;
    border: none;
    border-radius: 12px;
    background-color: #F4879C;
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .5px;
    cursor: pointer;
    transition: background-color .2s ease, transform .15s ease;
}

.tu-submit:hover {
    background-color: #e56e86;
    transform: translateY(-1px);
}

.tu-submit:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
}

.tu-status {
    margin: 0;
    font-size: 14px;
    min-height: 20px;
}

.tu-status.ok {
    color: #3f8c5a;
}

.tu-status.err {
    color: #c9463f;
}

/* responsive */
@media (max-width: 900px) {
    .tu-layout {
        grid-template-columns: 1fr;
    }

    .tu-preview-wrap {
        position: static;
    }

    .tu-title {
        font-size: 40px;
    }
}