/* ===== 젤리피아노 통합 스타일 =====
   base.css + styles.css 통합
*/

/* --- 기본 리셋 (base) --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
    width: 100%;
    height: 100vh;
    height: 100dvh;
    height: var(--app-height, 100vh);
    overflow: hidden;
}
body {
    background: linear-gradient(135deg, #0a1128 0%, #1a2332 25%, #0f1b2e 50%, #162447 75%, #0a1128 100%);
    background-attachment: fixed;
    color: #fff;
    font-family: 'Pretendard Variable', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x pan-y;
}

button, input, select {
    font: inherit;
}

canvas {
    display: block;
}

.control-group.legend {
    position: relative;
    z-index: 1;
}

/* --- 게임 모달 --- */
#game-modal {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    height: var(--app-height, 100vh);
    background: linear-gradient(135deg, #0a1128 0%, #1a2332 50%, #0f1b2e 100%);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    transition: background-color 0.3s;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x pan-y;
}

#game-modal::-webkit-scrollbar,
#game-modal::-webkit-scrollbar-track,
#game-modal::-webkit-scrollbar-thumb,
#game-modal::-webkit-scrollbar-corner {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
    background: transparent !important;
    opacity: 0 !important;
    visibility: hidden !important;
}

/* top-bar: 기본 레이아웃 (display: contents로 평탄화) */
.controls-row.top-bar .group-left,
.controls-row.top-bar .group-right {
    display: contents;
}
.controls-row.top-bar {
    justify-content: center;
    flex-wrap: nowrap;
}
.controls-row.top-bar .song-select-tablet { order: 0; }
.controls-row.top-bar #btn-play { order: 1; }
.controls-row.top-bar #btn-stop { order: 2; }
.controls-row.top-bar .control-group.legend { order: 3; }

.control-group label {
    padding-top: 6px;
    padding-bottom: 6px;
}

/* --- 곡 선택 버튼 --- */
.control-group.song-select-tablet {
    display: flex;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: none;
    padding: 0;
    box-shadow: none;
    position: relative;
}

.controls-row.bottom-bar {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.controls-row.bottom-bar .control-group-wrapper-top,
.controls-row.bottom-bar .control-group-wrapper {
    display: flex;
    gap: 12px;
    align-items: center;
}

.controls-row.bottom-bar .control-group-wrapper {
    order: 0;
}

.controls-row.bottom-bar .control-group-wrapper-top {
    order: 1;
}

/* --- 게임 내부 컨테이너 --- */
#game-inner-container {
    width: 100%;
    height: 100%;
    max-height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    background: transparent;
    transition: all 0.3s ease;
    box-shadow: none;
    overflow: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x pan-y;
    padding-top: 30px;
    padding-bottom: 10px;
    box-sizing: border-box;
}

#game-inner-container::-webkit-scrollbar,
#game-inner-container::-webkit-scrollbar-track,
#game-inner-container::-webkit-scrollbar-thumb,
#game-inner-container::-webkit-scrollbar-corner {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
    background: transparent !important;
    opacity: 0 !important;
    visibility: hidden !important;
}

#game-inner-container {
    width: calc(100% - 240px);
    max-width: none;
    margin-left: auto;
    margin-right: auto;
    border-left: 1px solid rgba(255, 255, 255, 0.06);
    border-right: 1px solid rgba(255, 255, 255, 0.06);
}

#controls {
    padding-left: 12px;
    padding-right: 12px;
    width: 100%;
    box-sizing: border-box;
    min-height: 60px;
}

/* --- 컨트롤 바 --- */
#controls {
    flex-shrink: 0;
    background: rgba(10, 17, 40, 0.65);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding: 12px 32px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
    justify-content: center;
    z-index: 20;
    width: 100%;
    box-sizing: border-box;
    transition: opacity 0.3s ease;
    min-height: 50px;
    padding-right: 32px;
    position: relative;
    margin-top: 0;
    margin-bottom: 0;
}

.controls-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
    width: 100%;
}

.controls-row.top-bar {
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}
.controls-row.bottom-bar { justify-content: center; }

.controls-row.top-bar,
.controls-row.bottom-bar {
    gap: 12px;
}
.controls-row.bottom-bar {
    box-sizing: border-box;
}

/* --- 하단 패널 (프로그레스바) --- */
#bottom-panel {
    width: 100%;
    background: rgba(10, 17, 40, 0.65);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    padding: 6px 32px;
    box-sizing: border-box;
    flex-shrink: 0;
    z-index: 30;
    margin-top: 5px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    justify-content: center;
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    order: 2;
    overflow-x: hidden;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

#bottom-panel::-webkit-scrollbar,
#bottom-panel::-webkit-scrollbar-track,
#bottom-panel::-webkit-scrollbar-thumb,
#bottom-panel::-webkit-scrollbar-corner {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
    background: transparent !important;
    opacity: 0 !important;
    visibility: hidden !important;
}

#progress-container {
    width: 100%;
    height: 6px;
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
}

#progress-bg {
    width: 100%;
    height: 4px;
    background-color: rgba(255, 255, 255, 0.08);
    position: absolute;
    border-radius: 4px;
}

#progress-fill {
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, #ff4757 0%, #ff6b7d 40%, #ff9a5c 100%);
    position: absolute;
    border-radius: 4px;
    pointer-events: none;
    box-shadow: 0 0 12px rgba(255, 71, 87, 0.5), 0 0 4px rgba(255, 71, 87, 0.3);
    transition: width 0.1s linear;
}

#progress-handle {
    width: 10px;
    height: 10px;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b7d 100%);
    border-radius: 50%;
    position: absolute;
    left: 0%;
    transform: translateX(-50%);
    pointer-events: none;
    transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 8px rgba(255, 71, 87, 0.6), 0 2px 4px rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

#progress-container:hover #progress-handle {
    transform: translateX(-50%) scale(1.3);
    box-shadow: 0 0 12px rgba(255, 71, 87, 0.8), 0 2px 6px rgba(0, 0, 0, 0.4);
}

.hidden-controls {
    display: none !important;
}

.group-left, .group-right {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    flex-shrink: 1;
    min-width: 0;
}

/* --- 곡 이름 표시 --- */
#song-name-display {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    z-index: 1000;
    font-size: 11px;
    color: rgba(0, 210, 255, 0.8);
    font-weight: 500;
    opacity: 0.8;
    pointer-events: none;
    display: none;
    background: rgba(10, 17, 40, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 5px 10px;
    border-radius: 8px;
    border: 1px solid rgba(0, 210, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3), 0 0 8px rgba(0, 210, 255, 0.1);
}

.song-select-tablet #song-name-display {
    font-size: 12px;
    max-width: 280px;
    opacity: 0.75;
}

/* --- control-group --- */
.control-group {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 11px;
    white-space: nowrap;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.04);
    flex-shrink: 1;
    min-width: 0;
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.control-group:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* --- file-upload --- */
.file-upload {
    position: relative;
    overflow: visible;
    display: inline-block;
}

.file-upload input[type=file] {
    font-size: 100px;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

/* --- legend (손가락 컬러) --- */
.legend {
    display: flex;
    gap: 8px;
    font-size: 13px;
    margin-left: 5px;
    flex-wrap: nowrap;
    justify-content: center;
    padding-left: 8px;
    padding-right: 8px;
}

.legend > div {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-top: 6px;
    padding-bottom: 6px;
}
.legend-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.15;
    font-size: inherit;
}
.legend-l { font-size: inherit; }
.legend-line {
    display: block;
    width: 1em;
    height: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.6);
    margin: 2px 0;
}
.legend-r { font-size: inherit; }

.legend .dot {
    width: 14px;
    height: 14px;
    margin-right: 3px;
}

.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 4px; }

.legend > div:nth-child(1) .dot { background: #ff4444; }
.legend > div:nth-child(2) .dot { background: #ffeb3b; }
.legend > div:nth-child(3) .dot { background: #00e676; }
.legend > div:nth-child(4) .dot { background: #536dfe; }
.legend > div:nth-child(5) .dot { background: #d05ce3; }

.control-group.legend {
    padding-left: 20px;
    padding-right: 20px;
}

#txt-speed {
    min-width: 40px;
    text-align: center;
}

/* --- 기본 요소 스타일 --- */
label {
    font-size: 13px;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

button {
    background: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 50%, #2563eb 100%);
    color: #000;
    border: none;
    padding: 4px 10px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 10px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(0, 210, 255, 0.25), 0 1px 3px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

button:not(.zoom-btn) {
    padding: 8px 14px;
    font-size: 14px;
}

button:hover {
    background: linear-gradient(135deg, #33dbff 0%, #5a8be5 50%, #4f8af7 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 210, 255, 0.45), 0 2px 6px rgba(0, 0, 0, 0.15);
}

button:active {
    transform: translateY(0) scale(0.97);
    box-shadow: 0 1px 4px rgba(0, 210, 255, 0.3);
}

button.zoom-btn {
    padding: 8px 14px;
    font-size: 18px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

button.zoom-btn {
    padding-top: 3.2px;
    padding-bottom: 3.2px;
}

button.zoom-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    border-color: rgba(255, 255, 255, 0.25);
}

button.zoom-btn:active {
    transform: translateY(0) scale(0.97);
}

button.stop {
    background: linear-gradient(135deg, #ff4757 0%, #ff6b7d 50%, #e63946 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 71, 87, 0.35), 0 1px 3px rgba(0, 0, 0, 0.1);
}

button.stop:hover {
    background: linear-gradient(135deg, #ff6b7d 0%, #ff8a9a 50%, #ff4757 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(255, 71, 87, 0.5);
}

button.stop:active {
    transform: translateY(0) scale(0.97);
    box-shadow: 0 1px 4px rgba(255, 71, 87, 0.3);
}

input[type="checkbox"] {
    accent-color: #00d2ff;
    width: 16px;
    height: 16px;
    cursor: pointer;
    border-radius: 4px;
}

label:has(input[type="checkbox"]) {
    transition: color 0.2s ease;
}

label:has(input[type="checkbox"]:checked) {
    color: #fff;
}

label:has(input[type="checkbox"]:not(:checked)) {
    color: rgba(255, 255, 255, 0.5);
}

select {
    background: rgba(15, 27, 46, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    max-width: 140px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.04);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='rgba(255,255,255,0.6)' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 24px;
}

select:hover {
    background-color: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

select:focus {
    outline: none;
    border-color: rgba(0, 210, 255, 0.5);
    box-shadow: 0 0 0 2px rgba(0, 210, 255, 0.15), 0 2px 8px rgba(0, 0, 0, 0.15);
}

select option {
    background: #0f1b2e;
    color: rgba(255, 255, 255, 0.9);
}

/* --- 게임 래퍼/컨테이너 --- */
#game-wrapper {
    flex: 1 1 auto;
    width: 100%;
    min-height: 0;
    overflow-x: scroll;
    overflow-y: hidden;
    scrollbar-gutter: stable;
    scrollbar-width: thin;
    scrollbar-color: #ffeb3b #000000;
    display: flex;
    position: relative;
    background: transparent;
    padding: 0;
    padding-bottom: 5px;
    margin-top: 0;
    margin-bottom: 0;
    box-sizing: border-box;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x pan-y;
    overscroll-behavior: contain;
    order: 1;
}

#game-container {
    position: absolute;
    max-width: none;
    height: auto;
    background: #000;
    box-shadow: none;
    transition: none;
    flex-shrink: 0;
    margin: 0;
    bottom: 5px;
    left: 0;
    cursor: grab;
}

#game-container:active { cursor: grabbing; }

canvas { display: block; width: 100%; height: 100%; }

/* --- 상태 메시지 --- */
#status-msg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(14px, 2.5vw, 20px);
    color: rgba(255, 255, 255, 0.9);
    pointer-events: none;
    text-align: center;
    max-width: 80%;
    padding: 20px 32px;
    white-space: pre-line;
    line-height: 1.8;
    z-index: 10;
    font-weight: 400;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: keep-all;
    margin: 0 auto;
    box-sizing: border-box;
    background: rgba(10, 17, 40, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.01em;
}

/* --- 좌우 분리선 (Canvas에서 렌더링) --- */
#center-guide {
    display: none;
}

/* --- 플로팅 줌 컨트롤 --- */
#floating-zoom-controls {
    position: absolute;
    left: 0px !important;
    background: rgba(10, 17, 40, 0.55);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    padding: 8px 14px;
    border-radius: 24px;
    display: flex;
    gap: 10px;
    align-items: center;
    opacity: 0.75;
    transition: opacity 0.2s ease, background 0.2s ease;
    z-index: 100;
    pointer-events: auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    cursor: default;
    user-select: none;
}

#floating-zoom-controls:hover {
    opacity: 0.9;
    background: rgba(10, 17, 40, 0.7);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

#floating-zoom-controls.dragging {
    opacity: 0.9;
    cursor: grabbing;
}

#floating-zoom-controls button {
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 0;
    font-size: 14px;
    font-weight: bold;
    border-radius: 50%;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: auto;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

#floating-zoom-controls button:hover {
    background: rgba(0, 210, 255, 0.3);
    border-color: rgba(0, 210, 255, 0.5);
    color: #fff;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 210, 255, 0.35);
}

#floating-zoom-controls button:active {
    transform: scale(0.95);
    background: rgba(0, 210, 255, 0.5);
}

#floating-zoom-controls span {
    font-size: 12px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    min-width: 40px;
    text-align: center;
    cursor: pointer;
    user-select: none;
    pointer-events: auto;
}

/* --- 스크롤바 (노란색) --- */
#game-wrapper::-webkit-scrollbar {
    width: 6px;
    height: 8px;
    -webkit-appearance: none;
    display: block;
}
#game-wrapper::-webkit-scrollbar-track {
    background: #000000 !important;
    border-radius: 3px;
    -webkit-box-shadow: inset 0 0 0 rgba(0, 0, 0, 0);
}
#game-wrapper::-webkit-scrollbar-thumb {
    background: #ffeb3b !important;
    border-radius: 3px;
    border: 1px solid transparent;
    background-clip: padding-box;
    min-height: 8px;
}
#game-wrapper::-webkit-scrollbar-thumb:hover { background: #ffd700 !important; }
#game-wrapper::-webkit-scrollbar-corner { background: #000000 !important; }

/* --- 손가락 색상 가이드 (game-inner-container 기준 absolute, JS로 위치/크기 동적 계산) --- */
.hand-guide {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.8s ease;
    pointer-events: none;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    overflow: hidden;
    /* top, left, width, height 는 JS에서 동적으로 설정 */
}

.hand-guide.hidden {
    opacity: 0;
    pointer-events: none;
}

.hand-guide svg {
    max-height: 100%;
    width: auto;
    max-width: 90%;
}

/* --- 반응형: 세로(portrait) 모니터 대응 --- */
@media (orientation: portrait) {
    #game-modal { align-items: flex-start; }

    /* 빈 공간 제거: 마진/높이 최적화 */
    #game-inner-container {
        height: 100%;
        max-height: 100%;
        width: calc(100% - 20px);
        padding-top: 5px;
        padding-bottom: 5px;
    }

    /* 진행바 아래 여백 추가: 건반이 화면 중하단에 위치하도록 */
    #bottom-panel {
        margin-bottom: 15vh;
    }

    /* #controls를 단일 flex-wrap 행으로 평탄화 */
    #controls {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        padding: 6px 12px;
        gap: 6px;
        min-height: auto;
    }

    /* 모든 중간 컨테이너를 display:contents로 평탄화 */
    .controls-row.top-bar,
    .controls-row.bottom-bar {
        display: contents;
    }
    .controls-row.bottom-bar .control-group-wrapper-top,
    .controls-row.bottom-bar .control-group-wrapper {
        display: contents;
    }

    /* === 1줄: [재생] [재설정] [곡제목+곡선택] === */
    #btn-play { order: 0; }
    #btn-stop { order: 1; }
    .song-select-tablet { order: 2; }

    /* 1줄과 2줄 사이 줄바꿈 */
    #controls::after {
        content: '';
        flex-basis: 100%;
        height: 0;
        order: 5;
    }

    /* === 2줄: [홈] [범례] [오른손/왼손] [구간] [반복] [속도] === */
    #btn-back-home { order: 9; }
    .control-group.legend {
        order: 10;
        display: flex !important;
        font-size: 9px;
        gap: 3px;
        padding: 3px 6px;
    }
    .control-group.legend .dot {
        width: 8px;
        height: 8px;
        margin-right: 2px;
    }
    .control-group.legend .legend-stack {
        line-height: 1.05;
    }
    .control-group.legend > div {
        padding-top: 2px;
        padding-bottom: 2px;
    }
    .control-group:has(#chk-right) { order: 11; }
    .control-group:has(#sel-section) { order: 12; }
    .control-group:has(#sel-repeat) { order: 13; }
    .control-group:has(#txt-speed) { order: 14; }

    /* 곡 이름: 절대 위치 해제, 인라인으로 표시 */
    #song-name-display {
        position: static;
        transform: none;
        max-width: 180px;
        font-size: 10px;
        padding: 2px 6px;
    }

    /* 컨트롤 컴팩트화 */
    button:not(.zoom-btn) { padding: 5px 10px; font-size: 12px; }
    .control-group { padding: 3px 7px; font-size: 10px; }
    select { padding: 5px 8px; font-size: 11px; padding-right: 20px; }
}

@media (orientation: portrait) and (max-width: 600px) {
    #game-inner-container { width: calc(100% - 10px); }

    /* 좁은 화면: 범례 점만 표시 (텍스트 숨김) */
    .control-group.legend .legend-stack { display: none; }
    .control-group.legend { gap: 2px; padding: 3px 5px; }
    .control-group.legend .dot { margin-right: 0; }

    #song-name-display { max-width: 120px; font-size: 9px; }
}

/* --- 곡 선택 오버레이 패널 --- */
#song-select-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 20000;
    display: flex;
    justify-content: center;
    align-items: center;
}

#song-select-panel {
    background: linear-gradient(135deg, #0f1b2e 0%, #162447 50%, #1a2332 100%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    padding: 24px;
    min-width: 320px;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 16px 64px rgba(0, 0, 0, 0.5), 0 0 32px rgba(0, 210, 255, 0.1);
}

.song-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.song-panel-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    margin: 0;
}

#btn-song-panel-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.8);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all 0.2s ease;
}

#btn-song-panel-close:hover {
    background: rgba(255, 71, 87, 0.8);
    color: #fff;
    transform: scale(1.05);
}

.song-item {
    padding: 14px 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    margin-bottom: 8px;
}

.song-item:hover {
    background: rgba(0, 210, 255, 0.1);
    border-color: rgba(0, 210, 255, 0.3);
}

.song-item.active {
    background: rgba(0, 210, 255, 0.15);
    border-color: rgba(0, 210, 255, 0.5);
}

.song-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 4px;
}

.song-item-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.difficulty-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 9999px;
    white-space: nowrap;
    flex-shrink: 0;
}

.difficulty-badge.beginner {
    background: rgba(46, 213, 115, 0.2);
    color: #2ed573;
    border: 1px solid rgba(46, 213, 115, 0.4);
}

.difficulty-badge.easy {
    background: rgba(30, 144, 255, 0.2);
    color: #1e90ff;
    border: 1px solid rgba(30, 144, 255, 0.4);
}

.difficulty-badge.intermediate {
    background: rgba(255, 165, 2, 0.2);
    color: #ffa502;
    border: 1px solid rgba(255, 165, 2, 0.4);
}

.difficulty-badge.advanced {
    background: rgba(255, 71, 87, 0.2);
    color: #ff4757;
    border: 1px solid rgba(255, 71, 87, 0.4);
}

.song-info {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}