* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    min-height: 100vh;
    overflow: hidden;
}

#container {
    display: flex;
    height: 100vh;
}

#info-panel {
    width: 350px;
    min-width: 350px;
    background: rgba(30, 30, 50, 0.95);
    padding: 20px;
    overflow-y: auto;
    border-right: 2px solid #4a4a6a;
    box-shadow: 5px 0 15px rgba(0, 0, 0, 0.3);
}

#info-panel h1 {
    font-size: 1.5em;
    margin-bottom: 5px;
    color: #00d4ff;
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

#info-panel h2 {
    font-size: 1.8em;
    margin-bottom: 15px;
    color: #ff6b6b;
    font-family: 'Times New Roman', serif;
    font-style: italic;
}

.description {
    font-size: 0.9em;
    color: #aaa;
    margin-bottom: 20px;
    line-height: 1.6;
}

.controls {
    background: rgba(50, 50, 80, 0.5);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.controls h3 {
    font-size: 1.1em;
    margin-bottom: 15px;
    color: #ffd700;
}

/* 표시 옵션 */
.display-options {
    background: rgba(50, 80, 50, 0.5);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid #00ff88;
}

.display-options h3 {
    font-size: 1.1em;
    margin-bottom: 15px;
    color: #00ff88;
}

.checkbox-group {
    margin-bottom: 10px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.9em;
    color: #ccc;
    transition: color 0.3s ease;
}

.checkbox-group label:hover {
    color: #fff;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    cursor: pointer;
    accent-color: #00ff88;
}

.checkbox-group span {
    user-select: none;
}

/* 색상 선택기 */
.color-picker-group {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-picker-group label {
    font-size: 0.9em;
    color: #ccc;
}

.color-picker-group input[type="color"] {
    width: 50px;
    height: 30px;
    border: 2px solid #4a4a6a;
    border-radius: 5px;
    cursor: pointer;
    background: transparent;
}

.color-picker-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.color-picker-group input[type="color"]::-webkit-color-swatch {
    border-radius: 3px;
    border: none;
}

.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.9em;
    color: #ccc;
}

.range-inputs {
    display: flex;
    align-items: center;
    gap: 10px;
}

.range-inputs input[type="number"] {
    width: 70px;
    padding: 8px;
    border: 1px solid #4a4a6a;
    border-radius: 5px;
    background: #2a2a4a;
    color: #fff;
    font-size: 0.9em;
}

.range-inputs span {
    color: #888;
}

input[type="range"] {
    width: 100%;
    margin-top: 5px;
}

#resolutionValue {
    display: inline-block;
    margin-left: 10px;
    color: #00d4ff;
}

#updateBtn {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

#updateBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.4);
}

.legend {
    background: rgba(50, 50, 80, 0.5);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.legend h3 {
    font-size: 1em;
    margin-bottom: 10px;
    color: #ffd700;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.85em;
}

.color-box {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    margin-right: 10px;
}

.color-box.real {
    background: linear-gradient(135deg, #00ff88 0%, #00aa55 100%);
}

.color-box.imag {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff3366 100%);
}

.color-box.ceiling {
    background: rgba(255, 215, 0, 0.5);
    border: 2px dashed #ffd700;
}

.info-box {
    background: rgba(50, 50, 80, 0.5);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.info-box h3 {
    font-size: 1em;
    margin-bottom: 10px;
    color: #ffd700;
}

.info-box p {
    font-size: 0.9em;
    margin-bottom: 5px;
    color: #ccc;
}

.info-box span {
    color: #00d4ff;
    font-weight: bold;
}

.formula-box {
    background: rgba(80, 50, 80, 0.5);
    padding: 15px;
    border-radius: 10px;
    border-left: 4px solid #ff6b6b;
}

.formula-box h3 {
    font-size: 1em;
    margin-bottom: 10px;
    color: #ff6b6b;
}

.formula-box p {
    font-size: 0.9em;
    margin-bottom: 5px;
    font-family: 'Times New Roman', serif;
    color: #ddd;
}

.formula-box strong {
    color: #00ff88;
}

#graph-container {
    flex: 1;
    position: relative;
}

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

/* 스크롤바 스타일링 */
#info-panel::-webkit-scrollbar {
    width: 8px;
}

#info-panel::-webkit-scrollbar-track {
    background: #1a1a2e;
}

#info-panel::-webkit-scrollbar-thumb {
    background: #4a4a6a;
    border-radius: 4px;
}

#info-panel::-webkit-scrollbar-thumb:hover {
    background: #6a6a8a;
}

/* 뒤로가기 링크 */
.back-link {
    display: inline-block;
    color: #00d4ff;
    text-decoration: none;
    margin-bottom: 15px;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.back-link:hover {
    color: #fff;
    text-decoration: underline;
}

/* 버전 배지 */
.version-badge {
    display: inline-block;
    background: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85em;
    margin-bottom: 15px;
}

.version-badge.v2 {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff3366 100%);
}

.version-badge.v3 {
    background: linear-gradient(135deg, #ffd700 0%, #ff9500 100%);
    color: #000;
}

/* 반응형 */
@media (max-width: 900px) {
    #container {
        flex-direction: column;
    }
    
    #info-panel {
        width: 100%;
        min-width: 100%;
        max-height: 40vh;
        border-right: none;
        border-bottom: 2px solid #4a4a6a;
    }
    
    #graph-container {
        height: 60vh;
    }
}