body {
    margin: 0;
    overflow: hidden;
    background-color: #FFFFFF; /* White Theme */
    font-family: 'Montserrat', sans-serif;
    color: #333333;
}

/* --- Global Header --- */
.global-header {
    width: 100%;
    padding: 20px 24px;
    box-sizing: border-box;
    background-color: #FFFFFF;
    text-align: left;
}

.global-header .logo {
    max-height: 50px;
    width: auto;
    display: block;
}

.global-header-ar {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 20;
}

/* --- Selection Screen --- */
#selection-screen {
    position: absolute;
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%;
    background: #FFFFFF;
    z-index: 100;
    display: flex;
    flex-direction: column;
    padding: 0;
    box-sizing: border-box;
    overflow-y: auto;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 40px;
}

.header h1 {
    font-size: 32px;
    margin: 0 0 8px 0;
    letter-spacing: 2px;
    font-weight: 600;
    color: #333333;
}

.header p {
    color: #666666;
    font-size: 16px;
    margin: 0;
}

#model-table {
    width: 100%;
    max-width: 600px;
    margin: 0 auto 40px auto;
    border-collapse: collapse;
    background: #FFFFFF;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(0, 163, 224, 0.2);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

#model-table th {
    background: #1B5E75; /* Optimance Teal */
    color: white;
    padding: 16px;
    text-align: left;
    font-weight: 500;
    letter-spacing: 0.5px;
}

#model-table td {
    padding: 16px;
    border-bottom: 1px solid #E0E0E0;
    vertical-align: middle;
}

#model-table tr:last-child td {
    border-bottom: none;
}

.action-cell {
    text-align: right;
    white-space: nowrap;
}


.select-btn {
    background: transparent;
    border: 1px solid #00A3E0; /* Optimance Light Blue */
    color: #00A3E0;
    padding: 8px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 13px;
    transition: all 0.3s;
    display: inline-block;
}

.select-btn:hover {
    background: #00A3E0;
    color: #00111A;
    box-shadow: 0 0 15px rgba(0, 163, 224, 0.5);
}

.model-thumb {
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 6px;
    background: #F5F5F5;
    display: block;
    border: 1px solid #E0E0E0;
}

.pdf-btn {
    background: transparent;
    border: 1px solid #1B5E75;
    color: #1B5E75;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Montserrat', sans-serif;
    font-weight: 500;
    font-size: 13px;
    text-decoration: none;
    transition: all 0.3s;
    margin-right: 8px;
    display: inline-block;
}

.pdf-btn:hover {
    background: #1B5E75;
    color: #FFFFFF;
    border-color: #1B5E75;
}

/* --- AR UI Overlay --- */
#ui-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 0;
    box-sizing: border-box;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 10;
    background: transparent;
}

#title {
    margin: 0 0 8px 0;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 1px;
    color: #333333;
}

#instructions {
    margin: 100px 0 16px 0; /* Add top margin to avoid global-header */
    font-size: 14px;
    color: #00A3E0;
    background: #FFFFFF;
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid rgba(0, 163, 224, 0.3);
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

#back-button {
    pointer-events: auto;
    background: #FFFFFF;
    border: 1px solid #1B5E75;
    color: #1B5E75;
    padding: 12px 24px;
    border-radius: 30px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: 0.3s;
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    width: 220px;
    text-align: center;
    box-sizing: border-box;
}

#back-button:hover {
    background: #1B5E75;
    color: #FFFFFF;
}

/* --- Override Three.js ARButton styles --- */
#ARButton, #IOSARButton {
    position: absolute !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    bottom: 100px !important;
    background: #1B5E75 !important;
    border: 1px solid #00A3E0 !important;
    border-radius: 30px !important;
    padding: 14px 28px !important;
    font-family: 'Montserrat', sans-serif !important;
    font-weight: 600 !important;
    font-size: 15px !important;
    letter-spacing: 0.5px !important;
    color: #fff !important;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 163, 224, 0.3) !important;
    transition: all 0.3s ease !important;
    cursor: pointer !important;
    pointer-events: auto !important;
    z-index: 100 !important;
    width: 220px !important;
    text-align: center !important;
    box-sizing: border-box !important;
    white-space: nowrap !important;
}

#ARButton:hover, #IOSARButton:hover {
    background: #00A3E0 !important;
    color: #00111A !important;
    transform: translateX(-50%) translateY(-2px) !important;
}

/* --- Responsive Adjustments --- */
@media (max-width: 600px) {
    #selection-screen {
        padding: 20px 12px;
    }

    .header h1 {
        font-size: 24px;
    }

    #model-table th, #model-table td {
        padding: 12px 8px;
        font-size: 13px;
    }

    .model-thumb {
        width: 48px;
        height: 48px;
    }

    .action-cell {
        white-space: normal;
        display: flex;
        flex-direction: column;
        gap: 8px;
        align-items: stretch;
    }

    .pdf-btn {
        margin-right: 0;
    }

    .pdf-btn, .select-btn {
        padding: 8px 10px;
        font-size: 12px;
        text-align: center;
    }
}

/* --- Hamburger Menu Styles --- */
.global-header {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 18px;
    padding: 0;
    z-index: 200;
}

.menu-toggle span {
    width: 100%;
    height: 2px;
    background-color: #1B5E75; /* Optimance Teal */
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.menu-toggle.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.menu-toggle.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.menu-toggle.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.menu-panel {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.08);
    z-index: 190;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 90px 24px 30px 24px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.menu-panel.open {
    right: 0;
}

.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 17, 26, 0.15);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: 180;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.menu-overlay.open {
    opacity: 1;
    visibility: visible;
}

.menu-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.menu-item {
    width: 100%;
}

.menu-link {
    display: block;
    padding: 12px 16px;
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    font-weight: 500;
    color: #333333;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.menu-link:hover {
    background-color: rgba(0, 163, 224, 0.05);
    color: #00A3E0;
    padding-left: 20px;
}

.menu-link.active {
    background-color: rgba(27, 94, 117, 0.08);
    color: #1B5E75;
    font-weight: 600;
}

.menu-item-admin {
    border-bottom: 2px dashed rgba(27, 94, 117, 0.15);
    padding-bottom: 12px;
    margin-bottom: 8px;
}

.menu-item-admin .menu-link {
    color: #1B5E75;
    font-weight: 600;
    background-color: rgba(27, 94, 117, 0.04);
}

.menu-item-admin .menu-link:hover {
    background-color: rgba(27, 94, 117, 0.08);
    color: #1B5E75;
}