/* ===== Body & Layout ===== */
:root {
    --dark-brown: #4A2C2A;
    --warm-brown: #8B5A2B;
    --brown: #8B4513;
    --brown-dark: #A0522D;
    --cream: #FAF7F0;
    --white: #FFFFFF;
    --gray-light: #F5F5F5;
    --gray-medium: #999999;
    --gray-dark: #666666;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
}

/* ===== Confirmation Modal ===== */
.confirm-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.confirm-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.confirm-modal {
    background: var(--cream);
    border-radius: 16px;
    padding: 30px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transform: scale(0.9);
    transition: var(--transition);
}

.confirm-modal-overlay.active .confirm-modal {
    transform: scale(1);
}

.confirm-modal h3 {
    color: var(--dark-brown);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 15px;
    margin-top: 0;
}

.confirm-modal p {
    color: var(--gray-dark);
    font-size: 0.95rem;
    margin-bottom: 25px;
    line-height: 1.5;
}

.confirm-modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.confirm-modal-buttons button {
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    font-family: inherit;
}

.confirm-modal-btn-cancel {
    background: var(--white);
    color: var(--gray-dark);
    border-color: var(--gray-light);
}

.confirm-modal-btn-cancel:hover {
    background: var(--gray-light);
    color: var(--dark-brown);
}

.confirm-modal-btn-confirm {
    background: var(--brown);
    color: var(--white);
}

.confirm-modal-btn-confirm:hover {
    background: var(--brown-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    font-family: "Poppins", sans-serif;
    overflow-x: hidden;
}

body {
    background: var(--gray-light);
    color: var(--dark-brown);
    overflow-y: auto;
    overflow-x: hidden;
}

.main-content {
    display: flex;
    width: 100%;
    min-height: calc(100vh - 60px);
    overflow: visible;
}

/* ===== UI Panel / Sidebar ===== */
#ui-panel {
    position: fixed;
    left: 0;
    top: 60px;
    width: 320px;
    height: calc(100% - 60px);
    background: #ffffff;
    z-index: 999;
    transition: transform 0.35s ease;
    transform: translateX(0);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-md);
    overflow-y: auto;
    overflow-x: hidden;
}

#ui-panel.hidden {
    transform: translateX(-100%);
    box-shadow: none;
}

/* Sidebar Header */
.sidebar-header {
    padding: 25px 20px 15px;
    border-bottom: 2px solid var(--gray-light);
    background: linear-gradient(135deg, var(--cream) 0%, var(--white) 100%);
}

.sidebar-header h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-brown);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-header h2 i {
    color: var(--brown);
}

/* Back Button */
.back-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    margin: 10px 20px;
    text-decoration: none;
    color: var(--brown);
    font-weight: 600;
    font-size: 0.9rem;
    background: var(--cream);
    border-radius: 8px;
    transition: var(--transition);
    border: 1px solid var(--gray-light);
}

.back-button:hover {
    background: var(--brown);
    color: var(--white);
    border-color: var(--brown);
}

/* Sidebar Content */
.sidebar-content {
    flex-grow: 1;
    padding: 80px 20px 15px;
}

#ui-panel.hidden .sidebar-header,
#ui-panel.hidden .sidebar-content {
    opacity: 0;
    pointer-events: none;
}

/* ===== Category Select ===== */
#categories-view {
    margin-bottom: 20px;
}

#categories-view select,
#showroom-size-picker select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--gray-light);
    border-radius: 10px;
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--dark-brown);
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

#categories-view select:focus,
#showroom-size-picker select:focus {
    outline: none;
    border-color: var(--brown);
    box-shadow: 0 0 0 4px rgba(139, 69, 19, 0.1);
}

/* Showroom Size Picker */
#showroom-size-picker {
    padding: 0 0 20px 0;
    border-bottom: 1px solid var(--gray-light);
    margin-bottom: 20px;
}

#showroom-size-picker h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-dark);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Furniture View ===== */
#furniture-view h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-dark);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.furniture-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.furniture-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: 12px;
    padding: 10px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.furniture-item:hover {
    border-color: var(--brown);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.furniture-item img {
    width: 100%;
    height: 85px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 8px;
}

.furniture-item span {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--dark-brown);
    line-height: 1.3;
}

.furniture-item .dimensions {
    font-size: 0.7rem;
    color: var(--gray-medium);
    margin-top: 4px;
    font-weight: 500;
}

/* Loading state for furniture items */
.furniture-item.loading {
    opacity: 0.7;
    pointer-events: none;
    border-color: var(--brown);
}

.furniture-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.furniture-loading i {
    font-size: 24px;
    color: var(--brown);
}

/* ===== Sidebar Toggle Button ===== */
.sidebar-toggle {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    left: 15px;
    z-index: 1001;
    background: var(--white);
    border: none;
    border-radius: 50%;
    width: 38px;
    height: 38px;
    font-size: 16px;
    cursor: pointer;
    color: var(--brown);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, background 0.3s ease;
}

.sidebar-toggle:hover {
    background: var(--brown);
    color: var(--white);
}

/* When sidebar is visible, button is on the right edge of sidebar */
#ui-panel:not(.hidden) ~ .sidebar-toggle {
    left: 320px;
}

.sidebar-toggle .fa-chevron-left {
    transition: transform 0.35s ease;
}

/* When sidebar is hidden, rotate arrow to point right */
.sidebar-toggle.toggled .fa-chevron-left {
    transform: rotate(180deg);
}

/* Hide sidebar toggle when sidebar is hidden (button stays visible) */
#ui-panel.hidden ~ .sidebar-toggle {
    left: 15px;
}

/* ===== 3D Showroom Container ===== */
#showroom-container {
    width: 100%;
    min-height: 100vh;
    position: relative;
    flex: 1;
    background: var(--gray-light);
    overflow: hidden;
}

#showroom {
    width: 100%;
    height: 100%;
    display: block;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    #ui-panel {
        width: 280px;
    }

    #ui-panel:not(.hidden) ~ .sidebar-toggle {
        left: 290px;
    }
    
    .sidebar-header {
        padding: 15px 12px 10px;
    }

    .sidebar-header h2 {
        font-size: 1rem;
    }

    .back-button {
        margin: 6px 12px;
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .sidebar-content {
        padding: 35px 12px 10px;
    }

    /* Smaller select dropdowns */
    #categories-view select,
    #showroom-size-picker select {
        padding: 8px 10px;
        font-size: 0.8rem;
    }

    /* Smaller section headers */
    #showroom-size-picker h3,
    #furniture-view h3 {
        font-size: 0.8rem;
        margin-bottom: 10px;
    }

    .furniture-list {
        gap: 8px;
    }

    .furniture-item {
        padding: 6px;
    }

    .furniture-item img {
        height: 60px;
    }

    .furniture-item span {
        font-size: 0.7rem;
    }

    .furniture-item .dimensions {
        font-size: 0.65rem;
    }
}

/* Extra small devices */
@media (max-width: 576px) {
    #ui-panel {
        width: 75vw;
        max-width: 260px;
        top: 50px;
        height: calc(100% - 50px);
    }

    #ui-panel:not(.hidden) ~ .sidebar-toggle {
        left: calc(75vw + 8px);
    }

    /* Smaller toggle button */
    .sidebar-toggle {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }

    .sidebar-header {
        padding: 12px 10px 8px;
    }

    .sidebar-header h2 {
        font-size: 0.9rem;
        gap: 6px;
    }

    .back-button {
        margin: 5px 10px;
        padding: 5px 8px;
        font-size: 0.75rem;
        gap: 5px;
    }
    
    .sidebar-content {
        padding: 40px 10px 10px;
    }

    .back-button i {
        font-size: 0.7rem;
    }

    .sidebar-content {
        padding: 8px 10px;
    }

    /* Smaller select dropdowns */
    #categories-view select,
    #showroom-size-picker select {
        padding: 6px 8px;
        font-size: 0.75rem;
        border-radius: 6px;
    }

    /* Smaller section headers */
    #showroom-size-picker {
        padding-bottom: 12px;
        margin-bottom: 12px;
    }

    #showroom-size-picker h3,
    #furniture-view h3 {
        font-size: 0.7rem;
        margin-bottom: 8px;
    }

    #showroom-size-picker select {
        padding: 7px 8px;
    }

    .furniture-list {
        gap: 6px;
        grid-template-columns: repeat(2, 1fr);
    }

    .furniture-item {
        padding: 5px;
        border-radius: 8px;
    }

    .furniture-item img {
        height: 50px;
        border-radius: 5px;
        margin-bottom: 5px;
    }

    .furniture-item span {
        font-size: 0.65rem;
    }

    .furniture-item .dimensions {
        font-size: 0.6rem;
    }
}

/* Very small devices (phones in portrait) */
@media (max-width: 380px) {
    #ui-panel {
        width: 80vw;
        max-width: 220px;
    }

    #ui-panel:not(.hidden) ~ .sidebar-toggle {
        left: calc(80vw + 5px);
    }

    .sidebar-toggle {
        width: 28px;
        height: 28px;
        font-size: 12px;
        left: 10px;
    }

    #ui-panel.hidden ~ .sidebar-toggle {
        left: 10px;
    }

    .back-button {
        margin: 4px 8px;
        padding: 4px 6px;
        font-size: 0.7rem;
    }

    .furniture-item img {
        height: 45px;
    }
}