/* ===== Design System ===== */
:root {
    --sidebar-bg: #1e1e2e;
    --sidebar-text: #cdd6f4;
    --sidebar-heading: #f5f5f7;
    --sidebar-border: #313244;
    --sidebar-input-bg: #313244;
    --sidebar-input-border: #45475a;
    --sidebar-input-text: #cdd6f4;
    --accent: #89b4fa;
    --accent-hover: #74c7ec;
    --accent-dark: #585b70;
    --success: #a6e3a1;
    --success-hover: #94e2d5;
    --info: #89dceb;
    --info-hover: #74c7ec;
    --danger: #f38ba8;
    --warning: #fab387;
    --canvas-bg: #f5f5f5;
    --canvas-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.08);
    --radius: 8px;
    --radius-sm: 5px;
    --transition: all 0.2s ease;
    --sidebar-width: 260px;
    --mobile-topbar-h: 48px;
    --mobile-toolbar-h: 48px;
}

/* ===== Global ===== */
* {
    box-sizing: border-box;
}

body {
    overflow: hidden;
    font-family: 'Segoe UI', 'Malgun Gothic', sans-serif;
    background-color: #11111b;
    color: #cdd6f4;
    margin: 0;
    -webkit-tap-highlight-color: transparent;
}

/* ===== App Container ===== */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* ===== Sidebar ===== */
.sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 14px 14px 0 14px;
    scrollbar-width: thin;
    scrollbar-color: var(--sidebar-border) transparent;
}

.sidebar-footer {
    padding: 10px 14px;
    border-top: 1px solid var(--sidebar-border);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    flex-shrink: 0;
}

.sidebar-content::-webkit-scrollbar {
    width: 5px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--sidebar-border);
    border-radius: 3px;
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-dark);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-header h5 {
    margin-bottom: 0;
}

.sidebar-close {
    color: var(--sidebar-text);
    font-size: 1.1rem;
    padding: 4px 8px;
    border: none;
    background: none;
}

.sidebar-close:hover {
    color: var(--danger);
}

.sidebar h5 {
    color: var(--sidebar-heading);
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 10px;
    letter-spacing: 0.02em;
}

.sidebar h6 {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.78rem;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sidebar hr {
    border-color: var(--sidebar-border);
    opacity: 0.5;
    margin: 10px 0;
}

.sidebar label {
    color: var(--sidebar-text);
    font-size: 0.78rem;
    font-weight: 500;
    margin-bottom: 2px;
}

/* ===== Sidebar Inputs ===== */
.sidebar .form-control,
.sidebar .form-select {
    background-color: var(--sidebar-input-bg);
    border: 1px solid var(--sidebar-input-border);
    color: var(--sidebar-input-text);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    transition: var(--transition);
}

.sidebar .form-control:focus,
.sidebar .form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(137, 180, 250, 0.2);
    background-color: var(--sidebar-input-bg);
    color: var(--sidebar-input-text);
}

.sidebar .form-control::placeholder {
    color: var(--accent-dark);
}

.sidebar .input-group-text {
    background-color: var(--accent-dark);
    border: 1px solid var(--sidebar-input-border);
    color: var(--sidebar-text);
    font-size: 0.78rem;
    font-weight: 600;
}

.sidebar .form-control-color {
    padding: 4px;
    height: 32px;
}

/* ===== Sidebar Buttons ===== */
.sidebar .btn {
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 600;
    transition: var(--transition);
    letter-spacing: 0.02em;
}

.sidebar .btn-primary {
    background: linear-gradient(135deg, var(--accent), #b4befe);
    border: none;
    color: #1e1e2e;
}

.sidebar .btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent));
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(137, 180, 250, 0.3);
}

.sidebar .btn-success {
    background: linear-gradient(135deg, var(--success), #94e2d5);
    border: none;
    color: #1e1e2e;
}

.sidebar .btn-success:hover {
    background: linear-gradient(135deg, var(--success-hover), var(--success));
}

.sidebar .btn-info {
    background: linear-gradient(135deg, var(--info), var(--accent));
    border: none;
    color: #1e1e2e;
}

.sidebar .btn-info:hover {
    background: linear-gradient(135deg, var(--info-hover), var(--info));
}

.sidebar .btn-secondary {
    background: var(--accent-dark);
    border: 1px solid var(--sidebar-input-border);
    color: var(--sidebar-text);
}

.sidebar .btn-secondary:hover {
    background: var(--sidebar-input-border);
    color: var(--sidebar-heading);
}

.sidebar .btn-outline-secondary {
    border-color: var(--sidebar-input-border);
    color: var(--sidebar-text);
}

.sidebar .btn-outline-secondary:hover {
    background: var(--sidebar-input-border);
    color: var(--sidebar-heading);
}

.sidebar .btn-outline-danger {
    border-color: var(--danger);
    color: var(--danger);
}

.sidebar .btn-outline-danger:hover {
    background: var(--danger);
    color: #1e1e2e;
}

/* ===== Sidebar Switch ===== */
.sidebar .form-check-label {
    color: var(--sidebar-text);
    font-size: 0.8rem;
}

.sidebar .form-check-input {
    background-color: var(--accent-dark);
    border-color: var(--sidebar-input-border);
}

.sidebar .form-check-input:checked {
    background-color: var(--accent);
    border-color: var(--accent);
}

/* ===== Main Area ===== */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100vh;
    overflow: hidden;
}

/* ===== Canvas Area ===== */
.canvas-wrapper {
    flex: 1;
    background-color: #181825;
    position: relative;
    overflow: auto;
    box-shadow: var(--canvas-shadow);
    -webkit-overflow-scrolling: touch;
}

.canvas-wrapper .canvas-container {
    background-color: var(--canvas-bg) !important;
}

#layout-canvas {
    display: block;
}

#canvas-info {
    position: absolute;
    bottom: 8px;
    right: 12px;
    background: rgba(30, 30, 46, 0.85);
    color: var(--sidebar-text);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-family: 'Consolas', 'Courier New', monospace;
    backdrop-filter: blur(4px);
    z-index: 10;
    pointer-events: none;
}

/* ===== Desktop Bottom Bar ===== */
.bottom-bar {
    background: var(--sidebar-bg);
    border-top: 1px solid var(--sidebar-border);
    padding: 5px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.bottom-bar .btn {
    border-radius: var(--radius-sm);
    font-size: 0.76rem;
    color: var(--sidebar-text);
    border-color: var(--sidebar-input-border);
}

.bottom-bar .btn:hover:not(:disabled) {
    background: var(--sidebar-input-border);
    color: var(--sidebar-heading);
}

.bottom-bar .btn:disabled {
    opacity: 0.35;
}

.shortcut-hints {
    display: flex;
    gap: 14px;
    align-items: center;
}

.shortcut-hints span {
    font-size: 0.7rem;
    color: var(--accent-dark);
}

.shortcut-hints kbd {
    background: var(--sidebar-input-bg);
    border: 1px solid var(--sidebar-input-border);
    border-radius: 3px;
    padding: 1px 4px;
    font-size: 0.66rem;
    color: var(--sidebar-text);
    font-family: 'Consolas', 'Courier New', monospace;
}

/* ===== Layout List ===== */
#localstorage-layout-list .list-group-item {
    background: var(--sidebar-input-bg);
    border-color: var(--sidebar-border);
    color: var(--sidebar-text);
    cursor: pointer;
    padding: 6px 10px;
    font-size: 0.8rem;
    transition: var(--transition);
    border-radius: var(--radius-sm) !important;
    margin-bottom: 2px;
}

#localstorage-layout-list .list-group-item:hover {
    background: var(--sidebar-input-border);
    color: var(--sidebar-heading);
}

#localstorage-layout-list .delete-layout {
    float: right;
    color: var(--danger);
    cursor: pointer;
    visibility: hidden;
    transition: var(--transition);
}

#localstorage-layout-list .list-group-item:hover .delete-layout {
    visibility: visible;
}

/* ===== Animations ===== */
#properties-panel,
#layer-controls {
    animation: fadeSlideIn 0.2s ease;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Furniture Selection UI ===== */
.furniture-section {
    background: rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-sm);
    padding: 8px;
    margin-bottom: 10px;
}

.category-label {
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 4px;
    font-weight: 600;
}

.preset-btn {
    flex: 1 1 calc(33.333% - 4px);
    text-align: center;
    padding: 4px 2px;
    font-size: 0.7rem;
    background: var(--sidebar-input-bg);
}

.preset-btn:hover {
    transform: translateY(-1px);
}

.custom-add-btn {
    border: 1px dashed var(--sidebar-border);
    background: transparent;
}
.custom-add-btn:hover {
    background: var(--sidebar-border);
}

/* ===== Onboarding Overlay ===== */
#canvas-onboarding {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    z-index: 5;
    background: rgba(24, 24, 37, 0.4);
    backdrop-filter: blur(2px);
}

.onboarding-card {
    background: rgba(30, 30, 46, 0.95);
    border: 1px solid var(--sidebar-border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    max-width: 320px;
    text-align: center;
    pointer-events: auto;
}

.onboarding-card h5 {
    color: var(--accent);
    margin-bottom: 12px;
}

.onboarding-card li {
    color: var(--sidebar-text);
}

.onboarding-card b {
    color: var(--sidebar-heading);
}

/* ==========================================================
   MOBILE STYLES
   ========================================================== */

/* ===== Mobile Top Bar ===== */
.mobile-topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--mobile-topbar-h);
    background: var(--sidebar-bg);
    border-bottom: 1px solid var(--sidebar-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    z-index: 1050;
}

.mobile-topbar .btn {
    color: var(--sidebar-text);
    font-size: 1.2rem;
    padding: 6px 10px;
    border: none;
    background: none;
}

.mobile-topbar .btn:disabled {
    opacity: 0.3;
}

.mobile-topbar .btn:hover {
    color: var(--accent);
}

.mobile-title {
    color: var(--sidebar-heading);
    font-size: 0.9rem;
    font-weight: 700;
}

.mobile-topbar-actions {
    display: flex;
    gap: 2px;
}

/* ===== Sidebar Overlay ===== */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1059;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* ===== Mobile Floating Toolbar ===== */
.mobile-toolbar {
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: 24px;
    padding: 6px 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    z-index: 1040;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.mobile-toolbar .btn {
    color: var(--sidebar-text);
    font-size: 1.1rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    background: none;
    padding: 0;
    transition: var(--transition);
}

.mobile-toolbar .btn:hover,
.mobile-toolbar .btn:active {
    background: var(--sidebar-input-border);
    color: var(--accent);
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--sidebar-border);
    margin: 0 4px;
}

/* ===== Mobile Responsive ===== */
@media (max-width: 767.98px) {
    .app-container {
        flex-direction: column;
        padding-top: var(--mobile-topbar-h);
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 280px;
        min-width: 280px;
        z-index: 1060;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        padding-bottom: 80px;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-area {
        height: calc(100vh - var(--mobile-topbar-h));
    }

    .canvas-wrapper {
        border-radius: 0;
    }

    #canvas-info {
        bottom: 60px;
        right: 8px;
        font-size: 0.65rem;
        padding: 3px 8px;
    }

    /* Touch-friendly: bigger tap targets */
    .sidebar .btn {
        min-height: 38px;
        font-size: 0.82rem;
    }

    .sidebar .form-control,
    .sidebar .form-select {
        min-height: 38px;
        font-size: 0.85rem;
    }

    .sidebar .form-check-input {
        width: 2.2em;
        height: 1.2em;
    }

    .sidebar .input-group-text {
        font-size: 0.82rem;
    }

    /* Hide delete icon always visible on mobile (no hover) */
    #localstorage-layout-list .delete-layout {
        visibility: visible;
    }
}

/* ===== Tablet ===== */
@media (min-width: 768px) and (max-width: 1024px) {
    .sidebar {
        width: 240px;
        min-width: 240px;
    }

    .shortcut-hints {
        gap: 8px;
    }

    .shortcut-hints span {
        font-size: 0.65rem;
    }
}

/* ===== Large Desktop ===== */
@media (min-width: 1400px) {
    .sidebar {
        width: 280px;
        min-width: 280px;
    }
}