:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e9ecf0;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --border-color: #cbd5e1;
    --accent-color: #f59e0b;
    --accent-hover: #d97706;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --header-height: 48px;
    --footer-height: 56px;
    --panel-width: 280px;
    --transition: all 0.2s ease;
}

body.dark-theme {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #475569;
    --accent-color: #fbbf24;
    --accent-hover: #f59e0b;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Inter', sans-serif;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    transition: background 0.3s, color 0.3s;
}

#canvas-container {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 1;
}

/* Menu górne */
#top-menu-bar {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 16px;
    z-index: 100;
    box-shadow: var(--shadow);
    backdrop-filter: blur(8px);
}

.menu-item {
    position: relative;
    padding: 8px 16px;
    margin: 0 2px;
    cursor: pointer;
    border-radius: 6px;
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
    transition: var(--transition);
}
.menu-item:hover { background: var(--bg-tertiary); }

.menu-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-width: 200px;
    display: none;
    box-shadow: var(--shadow);
    z-index: 200;
    padding: 4px 0;
}
.menu-item:hover .menu-dropdown { display: block; }

.menu-dropdown-item {
    padding: 8px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    transition: var(--transition);
    font-size: 13px;
}
.menu-dropdown-item:hover { background: var(--bg-tertiary); }
.menu-dropdown-item i { width: 18px; color: var(--accent-color); }

/* Dolny pasek */
#bottom-view-bar {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: 4px 8px;
    display: flex;
    gap: 4px;
    z-index: 90;
    box-shadow: var(--shadow);
    backdrop-filter: blur(8px);
}
.view-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 12px;
    padding: 8px 12px;
    border-radius: 30px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: var(--transition);
    min-width: 56px;
}
.view-btn i { font-size: 16px; margin-bottom: 2px; }
.view-btn:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.view-btn.active { background: var(--accent-color); color: white; }

/* Panele boczne */
.side-panel {
    position: absolute;
    top: calc(var(--header-height) + 12px);
    bottom: calc(var(--footer-height) + 12px);
    width: var(--panel-width);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    z-index: 80;
    box-shadow: var(--shadow);
    backdrop-filter: blur(8px);
    transition: transform 0.2s, width 0.2s;
    overflow: hidden;
}
#left-panel { left: 16px; }
#right-panel { right: 16px; }

.panel-header {
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}
.panel-title { flex: 1; font-weight: 600; font-size: 14px; }
.panel-controls { display: flex; gap: 8px; }
.panel-controls button {
    background: none; border: none; color: var(--text-secondary);
    cursor: pointer; font-size: 14px; padding: 4px; border-radius: 4px;
}
.panel-controls button:hover { background: var(--bg-primary); color: var(--accent-color); }

.panel-tabs {
    display: flex; background: var(--bg-tertiary); padding: 0 8px;
    border-bottom: 1px solid var(--border-color);
}
.tab {
    padding: 8px 16px; cursor: pointer; border-bottom: 2px solid transparent;
    color: var(--text-secondary); font-size: 13px;
}
.tab.active { color: var(--accent-color); border-bottom-color: var(--accent-color); }
.panel-content { flex: 1; padding: 16px; overflow-y: auto; font-size: 13px; }

.panel-minimized { height: 48px !important; bottom: auto !important; }
.panel-minimized .panel-content, .panel-minimized .panel-tabs { display: none; }

/* Panel mebla */
#furniture-panel {
    position: absolute; bottom: 20px; right: 310px; background: var(--bg-secondary);
    padding: 16px; border-radius: 12px; box-shadow: var(--shadow); z-index: 70;
    width: 240px; border: 1px solid var(--border-color); backdrop-filter: blur(8px);
}
.param-group {
    margin-bottom: 12px; display: flex; align-items: center;
}
.param-group label { width: 90px; font-size: 13px; }
.param-group input {
    flex: 1; padding: 6px; border-radius: 4px; border: 1px solid var(--border-color);
    background: var(--bg-tertiary); color: var(--text-primary);
}
.add-btn {
    background: var(--accent-color); color: white; border: none; padding: 8px;
    border-radius: 6px; width: 100%; font-weight: bold; cursor: pointer; margin-top: 5px;
}
.delete-btn { background: #ef4444; margin-top: 8px; }

/* Modal */
#settings-modal {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 600px; max-width: 90vw; max-height: 80vh; background: var(--bg-secondary);
    border: 1px solid var(--border-color); border-radius: 16px; box-shadow: var(--shadow);
    z-index: 300; display: none; flex-direction: column; backdrop-filter: blur(16px);
}
#settings-modal.visible { display: flex; }
.modal-header {
    padding: 16px 20px; border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; justify-content: space-between;
}
.modal-close { background: none; border: none; color: var(--text-secondary); font-size: 20px; cursor: pointer; }
.modal-tabs { display: flex; padding: 0 16px; border-bottom: 1px solid var(--border-color); }
.modal-tab {
    padding: 12px 20px; cursor: pointer; border-bottom: 2px solid transparent;
    color: var(--text-secondary);
}
.modal-tab.active { color: var(--accent-color); border-bottom-color: var(--accent-color); }
.modal-content { padding: 20px; overflow-y: auto; max-height: 60vh; }
.setting-row { margin-bottom: 20px; }
.setting-row label { display: block; margin-bottom: 8px; font-weight: 500; }
input[type="color"] {
    width: 60px; height: 36px; border: 1px solid var(--border-color);
    border-radius: 6px; background: var(--bg-tertiary);
}
.modal-footer {
    padding: 16px 20px; border-top: 1px solid var(--border-color);
    display: flex; justify-content: flex-end; gap: 12px;
}
.btn {
    padding: 8px 16px; border-radius: 6px; border: 1px solid var(--border-color);
    background: var(--bg-tertiary); color: var(--text-primary); cursor: pointer;
}
.btn-primary { background: var(--accent-color); border-color: var(--accent-color); color: white; }
#modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.3);
    z-index: 250; display: none; backdrop-filter: blur(4px);
}
#modal-overlay.visible { display: block; }

.property-row { display: flex; margin-bottom: 8px; }
.property-label { width: 100px; color: var(--text-secondary); }

#multi-window-btn {
    margin-left: 16px; background: var(--accent-color); border: none; color: white;
    padding: 6px 16px; border-radius: 20px; cursor: pointer; font-weight: bold;
}