* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding-bottom: env(safe-area-inset-bottom);
    overflow-x: hidden; /* body 가로 스크롤 방지 */
}
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 12px 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}
.header h1 { font-size: 1.2em; }
.header-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}
.connection-status {
    font-size: 0.75em;
    padding: 3px 10px;
    border-radius: 20px;
    background: rgba(0,0,0,0.3);
}
.connection-status.connected { background: var(--success); }
.connection-status.disconnected { background: var(--danger); }
.btn-icon {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 8px;
    background: rgba(255,255,255,0.2);
    color: var(--text);
    font-size: 1em;
    cursor: pointer;
}
.btn-icon:active { transform: scale(0.95); background: rgba(255,255,255,0.3); }

/* 캐릭터 컨테이너 - 가로 배치 + 가로 스크롤 */
.characters-container {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 12px;
    padding-bottom: 20px;
    gap: 12px;
    min-height: calc(100vh - 60px);
    align-items: flex-start;
    -webkit-overflow-scrolling: touch;
}
.characters-container::-webkit-scrollbar { height: 12px; }
.characters-container::-webkit-scrollbar-track { background: var(--surface); border-radius: 6px; }
.characters-container::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 6px; }
.characters-container::-webkit-scrollbar-thumb:hover { background: var(--primary-dark); }

.loading-message {
    color: var(--text-muted);
    padding: 20px;
    text-align: center;
    width: 100%;
}

/* 캐릭터 패널 */
.character-panel {
    width: 480px;
    min-width: 480px;
    background: var(--surface);
    border-radius: 12px;
    flex-shrink: 0;
}
.character-header {
    background: var(--surface-light);
    padding: 12px;
    border-radius: 12px 12px 0 0;
}
.character-header h2 {
    font-size: 1em;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}
.character-header h2::before { content: '👤'; }
.character-content {
    padding: 12px;
}

/* 섹션 */
.section {
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    margin-bottom: 8px;
    overflow: hidden;
}
.section-header {
    padding: 10px 12px;
    font-weight: 600;
    font-size: 0.85em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0,0,0,0.2);
}
.section-header::after {
    content: '▼';
    font-size: 0.6em;
    transition: transform 0.3s;
}
.section-header.collapsed::after { transform: rotate(-90deg); }
.section-content { padding: 10px; }
.section-content.hidden { display: none; }

/* 컨트롤 */
.control-group { margin-bottom: 12px; }
.slider-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}
.slider-header label { font-size: 0.8em; color: var(--text-muted); }
.value-input {
    font-family: monospace;
    background: var(--bg);
    border: 1px solid var(--surface-light);
    border-radius: 4px;
    padding: 4px 6px;
    font-size: 0.8em;
    color: var(--text);
    width: 80px;
    text-align: right;
}
.value-input:focus {
    outline: none;
    border-color: var(--primary);
}
.value-input::-webkit-inner-spin-button,
.value-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.slider-row { display: flex; align-items: center; gap: 4px; }
input[type="range"] {
    flex: 1;
    height: 32px;
    -webkit-appearance: none;
    background: transparent;
}
input[type="range"]::-webkit-slider-track {
    height: 5px;
    background: var(--bg);
    border-radius: 3px;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    margin-top: -7px;
}
.btn-fine {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
}
.btn-fine:active { background: var(--primary); }
.btn {
    padding: 10px 14px;
    border: none;
    border-radius: 6px;
    font-size: 0.85em;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-top: 6px;
}
.btn-primary { background: var(--primary); color: white; }
.btn-secondary { background: var(--secondary); color: white; }
.btn-danger { background: var(--danger); color: white; }
.button-group { display: flex; gap: 6px; }
.button-group .btn { flex: 1; margin-top: 0; }
.calibration-status {
    text-align: center;
    padding: 6px;
    border-radius: 6px;
    margin-bottom: 10px;
    background: var(--bg);
    font-size: 0.8em;
}
.calibration-status.has-data { background: var(--success); color: white; }
select {
    width: 100%;
    padding: 8px;
    border: none;
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.85em;
}
.sub-section-title {
    font-size: 0.75em;
    color: var(--text-muted);
    margin: 10px 0 6px 0;
    padding-bottom: 3px;
    border-bottom: 1px solid var(--bg);
}
.toggle-row { display: flex; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.toggle-label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    font-size: 0.8em;
}
.toggle-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
}
.preset-hint {
    font-size: 0.7em;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-align: center;
}
.preset-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}
.preset-btn {
    padding: 8px 4px;
    border: none;
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.7em;
    cursor: pointer;
    text-align: center;
    word-break: break-word;
}
.preset-btn:active { background: var(--primary); }

/* 토스트 */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    font-size: 0.85em;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1000;
    max-width: 85%;
    text-align: center;
}
.toast.show { opacity: 1; }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

/* 범위 슬라이더 (MinMax) */
.range-slider-group { margin-bottom: 12px; }
.range-slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}
.range-slider-header label { font-size: 0.8em; color: var(--text-muted); }
.range-slider-values {
    display: flex;
    gap: 8px;
    font-family: monospace;
    font-size: 0.75em;
}
.range-slider-values input {
    width: 50px;
    padding: 2px 4px;
    background: var(--bg);
    border: 1px solid var(--surface-light);
    border-radius: 4px;
    color: var(--text);
    text-align: center;
}
.range-slider-container {
    position: relative;
    height: 32px;
    display: flex;
    align-items: center;
}
.range-slider-track {
    position: absolute;
    width: 100%;
    height: 5px;
    background: var(--bg);
    border-radius: 3px;
}
.range-slider-fill {
    position: absolute;
    height: 5px;
    background: var(--primary);
    border-radius: 3px;
}
.range-slider-container input[type="range"] {
    position: absolute;
    width: 100%;
    pointer-events: none;
    -webkit-appearance: none;
    background: transparent;
    height: 32px;
}
.range-slider-container input[type="range"]::-webkit-slider-thumb {
    pointer-events: auto;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}
.range-slider-container input[type="range"]::-webkit-slider-track {
    background: transparent;
}

/* 모바일 - 세로 스크롤 */
@media (max-width: 768px) {
    .characters-container {
        flex-direction: column;
        flex-wrap: nowrap;
        overflow-x: visible;
    }
    .character-panel {
        width: 100%;
        min-width: 100%;
        max-width: 100%;
    }
}