body#kujiraSinkBuilder {
    margin: 0;
    width: 100%;
    min-height: 100%;
    overflow: hidden;
}

#kujiraSinkBuilder,
#kujiraSinkBuilder * {
    box-sizing: border-box;
}

#kujiraSinkBuilder {
    width: 100%;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    color: #222;
}

#kujiraSinkBuilder .builder {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    width: 100%;
    height: 100vh;
    min-height: 700px;
}

#kujiraSinkBuilder .drawing-area {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-rows: minmax(0, 2.4fr) minmax(150px, 1fr);
    gap: 24px;
    padding: 28px 32px 30px;
    background: white;
    min-width: 0;
    min-height: 0;
}

#kujiraSinkBuilder .view {
    position: relative;
    min-width: 0;
    min-height: 0;
}

#kujiraSinkBuilder .iso-view {
    grid-column: 1 / 4;
}

#kujiraSinkBuilder .view-label {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 30;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: #777;
    pointer-events: none;
}

#kujiraSinkBuilder #threeViewer,
#kujiraSinkBuilder .mini-three-view {
    position: absolute;
    inset: 18px 0 0 0;
    overflow: hidden;
}

#kujiraSinkBuilder #threeViewer canvas,
#kujiraSinkBuilder .mini-three-view canvas {
    display: block;
    width: 100%;
    height: 100%;
}

#kujiraSinkBuilder .controls {
    padding: 26px 28px 40px;
    background: #f4f4f4;
    border-left: 1px solid #ddd;
    overflow-y: auto;
}

#kujiraSinkBuilder .menu-logo { margin: 2px 0 24px; }
#kujiraSinkBuilder .menu-logo img {
    display: block;
    width: 100%;
    max-width: 190px;
    height: auto;
}

#kujiraSinkBuilder .controls h1 {
    margin: 0 0 28px;
    font-size: 24px;
}

#kujiraSinkBuilder .control-group { margin-bottom: 20px; }
#kujiraSinkBuilder .control-group > label {
    display: block;
    margin-bottom: 7px;
    font-size: 13px;
    font-weight: 600;
}

#kujiraSinkBuilder .input-with-unit {
    display: flex;
    align-items: center;
}

#kujiraSinkBuilder .input-with-unit input,
#kujiraSinkBuilder select,
#kujiraSinkBuilder .purchase-fields input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    background: white;
    color: #222;
    font: inherit;
    font-size: 15px;
}

#kujiraSinkBuilder .input-with-unit span {
    margin-left: 8px;
    font-size: 13px;
    color: #777;
}

#kujiraSinkBuilder .option-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}
#kujiraSinkBuilder .option-grid-two { grid-template-columns: repeat(2, 1fr); }

#kujiraSinkBuilder .check-option {
    display: flex !important;
    align-items: center;
    gap: 7px;
    margin: 0 !important;
    padding: 10px 9px;
    border: 1px solid #ccc;
    border-radius: 4px;
    background: white;
    font-size: 13px;
    font-weight: 400 !important;
    cursor: pointer;
}
#kujiraSinkBuilder .check-option input { margin: 0; }
#kujiraSinkBuilder .label-note { font-weight: 400; color: #777; }

#kujiraSinkBuilder .loading-overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: #777;
    pointer-events: none;
    transition: opacity 0.15s ease;
}
#kujiraSinkBuilder .loading-overlay.hidden { opacity: 0; visibility: hidden; }
#kujiraSinkBuilder .loading-overlay.error { color: #222; }

#kujiraSinkBuilder .price-card {
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid #ccc;
}
#kujiraSinkBuilder .price-label {
    margin-bottom: 6px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.2px;
    color: #666;
}
#kujiraSinkBuilder .price-value {
    font-size: 34px;
    line-height: 1;
    font-weight: 700;
    letter-spacing: -1px;
}
#kujiraSinkBuilder .price-note,
#kujiraSinkBuilder .buy-credit-note {
    margin-top: 9px;
    font-size: 11px;
    line-height: 1.4;
    color: #777;
}

#kujiraSinkBuilder .buy-design-button,
#kujiraSinkBuilder .confirm-buy-button,
#kujiraSinkBuilder #startBuilderButton {
    width: 100%;
    margin-top: 16px;
    padding: 13px 16px;
    border: 1px solid #111;
    border-radius: 4px;
    background: #111;
    color: white;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
}
#kujiraSinkBuilder #startBuilderButton { width: auto; padding-inline: 18px; }
#kujiraSinkBuilder .confirm-buy-button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

#kujiraSinkBuilder .intro-modal,
#kujiraSinkBuilder .purchase-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(255, 255, 255, 0.94);
    transition: opacity 0.18s ease, visibility 0.18s ease;
}
#kujiraSinkBuilder .purchase-modal { z-index: 1100; overflow-y: auto; }
#kujiraSinkBuilder .intro-modal.hidden,
#kujiraSinkBuilder .purchase-modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#kujiraSinkBuilder .intro-card,
#kujiraSinkBuilder .purchase-card {
    width: min(600px, 100%);
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    padding: 42px;
    border: 1px solid #d5d5d5;
    background: white;
    box-shadow: 0 18px 55px rgba(0, 0, 0, 0.10);
}
#kujiraSinkBuilder .purchase-card { position: relative; }
#kujiraSinkBuilder .intro-logo,
#kujiraSinkBuilder .purchase-logo {
    display: block;
    width: 220px;
    max-width: 75%;
    height: auto;
    margin-bottom: 30px;
}
#kujiraSinkBuilder .intro-card h1,
#kujiraSinkBuilder .purchase-card h2 {
    margin: 0 0 18px;
    font-size: 28px;
}
#kujiraSinkBuilder .intro-card p,
#kujiraSinkBuilder .purchase-card p {
    margin: 0 0 14px;
    font-size: 15px;
    line-height: 1.55;
    color: #444;
}
#kujiraSinkBuilder .intro-card .intro-note {
    color: #777;
    font-size: 13px;
}
#kujiraSinkBuilder .purchase-credit { font-weight: 700; color: #222 !important; }

#kujiraSinkBuilder .modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 36px;
    height: 36px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #555;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}

#kujiraSinkBuilder .purchase-summary {
    margin: 26px 0;
    padding: 18px;
    background: #f5f5f5;
}
#kujiraSinkBuilder .purchase-section-title {
    margin-bottom: 12px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.2px;
    color: #666;
}
#kujiraSinkBuilder .purchase-summary dl {
    display: grid;
    grid-template-columns: minmax(120px, 0.8fr) minmax(0, 1.2fr);
    gap: 8px 16px;
    margin: 0;
}
#kujiraSinkBuilder .purchase-summary dt {
    color: #777;
    font-size: 13px;
}
#kujiraSinkBuilder .purchase-summary dd {
    margin: 0;
    font-size: 13px;
    font-weight: 600;
    text-align: right;
}

#kujiraSinkBuilder .purchase-fields {
    display: grid;
    grid-template-columns: 1fr;
    gap: 7px;
    margin-top: 24px;
}
#kujiraSinkBuilder .purchase-fields label {
    margin-top: 8px;
    font-size: 13px;
    font-weight: 600;
}

#kujiraSinkBuilder .purchase-agreement {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin-top: 24px;
    font-size: 13px;
    line-height: 1.45;
    cursor: pointer;
}
#kujiraSinkBuilder .purchase-agreement input {
    flex: 0 0 auto;
    margin-top: 3px;
}
#kujiraSinkBuilder .purchase-status {
    min-height: 20px;
    margin-top: 14px;
    color: #9a2b20;
    font-size: 12px;
    line-height: 1.4;
}

@media (max-width: 900px) {
    body#kujiraSinkBuilder { overflow: auto; }

    #kujiraSinkBuilder .builder {
        grid-template-columns: 1fr;
        height: auto;
        min-height: 100vh;
    }

    #kujiraSinkBuilder .drawing-area {
        height: 720px;
    }

    #kujiraSinkBuilder .controls {
        border-left: 0;
        border-top: 1px solid #ddd;
    }
}

@media (max-width: 700px) {
    #kujiraSinkBuilder .drawing-area {
        grid-template-columns: 1fr;
        grid-template-rows: 390px 190px 190px 190px;
        gap: 18px;
        height: auto;
        padding: 18px 16px 24px;
    }

    #kujiraSinkBuilder .iso-view { grid-column: 1; }
    #kujiraSinkBuilder .ortho-view { min-height: 190px; }

    #kujiraSinkBuilder .controls {
        padding: 24px 18px 40px;
    }

    #kujiraSinkBuilder .menu-logo img { max-width: 160px; }
    #kujiraSinkBuilder .controls h1 { font-size: 22px; }

    #kujiraSinkBuilder .intro-modal,
    #kujiraSinkBuilder .purchase-modal {
        align-items: flex-start;
        padding: 12px;
    }

    #kujiraSinkBuilder .intro-card,
    #kujiraSinkBuilder .purchase-card {
        max-height: calc(100vh - 24px);
        padding: 28px 20px;
    }

    #kujiraSinkBuilder .intro-card h1,
    #kujiraSinkBuilder .purchase-card h2 {
        font-size: 24px;
    }

    #kujiraSinkBuilder .purchase-summary dl {
        grid-template-columns: 1fr;
        gap: 3px;
    }
    #kujiraSinkBuilder .purchase-summary dd {
        margin: 0 0 9px;
        text-align: left;
    }
}