@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --widget-bg-color: #ffffff;
    --border-color: #dee2e6;
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --secondary-text-color: #6c757d;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

body.dark-mode {
    --bg-color: #212529;
    --text-color: #f8f9fa;
    --widget-bg-color: #343a40;
    --border-color: #495057;
    --primary-color: #0d6efd;
    --primary-hover-color: #0a58ca;
    --secondary-text-color: #adb5bd;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.site-header {
    text-align: center;
    padding: 20px 0;
}

.site-header h1 { font-size: 2.2em; }
.site-header .subtitle { font-size: 1.1em; color: var(--secondary-text-color); }

.info-section {
    background-color: var(--widget-bg-color);
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

#app {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

#controls {
    width: 280px;
    flex-shrink: 0;
    background-color: var(--widget-bg-color);
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.control-group { margin-bottom: 20px; }
.control-group h2 {
    margin-top: 0;
    font-size: 1.1em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 15px;
}

.input-pair { margin-bottom: 10px; }
.delete-info { font-size: 0.8em; color: var(--secondary-text-color); text-align: center; margin-top: 15px; }

#right-panel {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
}

#options {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 20px;
    background-color: var(--widget-bg-color);
    padding: 10px 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

#layout-tabs {
    display: flex;
    gap: 10px;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    background: var(--widget-bg-color);
    color: var(--text-color);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
}

.tab-btn.active { background: var(--primary-color); color: white; }

#canvas-container {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: #fff;
    overflow: hidden; /* Hide potential overflow */
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

#room-canvas {
    display: block; /* Remove extra space below canvas */
    width: 100%;
    height: auto; /* Allow height to be determined by aspect ratio */
}

/* Forms and Buttons */
label { display: block; font-weight: 500; font-size: 0.9em; margin-bottom: 5px; }
input, select { padding: 8px; border: 1px solid var(--border-color); border-radius: 4px; width: 100%; box-sizing: border-box; }
button#add-furniture { padding: 10px; background-color: var(--primary-color); color: #fff; border: none; border-radius: 4px; cursor: pointer; width: 100%; margin-top: 5px; }
button#add-furniture:hover { background-color: var(--primary-hover-color); }

footer { text-align: center; padding: 40px 20px; color: var(--secondary-text-color); font-size: 0.9em; }
footer nav a { color: var(--secondary-text-color); text-decoration: none; margin: 0 10px; }

/* Theme & Language */
.theme-switcher, .language-selector { display: flex; align-items: center; gap: 8px; }
.switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; transition: .4s; border-radius: 24px; }
.slider:before { position: absolute; content: ""; height: 16px; width: 16px; left: 4px; bottom: 4px; background-color: white; transition: .4s; border-radius: 50%; }
input:checked + .slider { background-color: var(--primary-color); }
input:checked + .slider:before { transform: translateX(20px); }

@media (max-width: 768px) {
    #app { flex-direction: column; }
    #controls { width: 100%; box-sizing: border-box; }
}