/* 🎵 성탄 칸타타 바이올린 연습 플레이어 - 스타일 */

:root {
    /* 색상 테마 - 진한 파랑 + 밝은 청록 */
    --primary: #00e5c7;
    --primary-dark: #00b89c;
    --primary-light: #5fffeb;
    --secondary: #0a3d62;
    --secondary-dark: #051d30;
    
    /* 배경 */
    --bg-gradient: linear-gradient(180deg, #0d2137 0%, #0a1929 100%);
    --card-bg: rgba(10, 45, 80, 0.7);
    --card-border: rgba(0, 229, 199, 0.15);
    
    /* 텍스트 */
    --text-primary: #ffffff;
    --text-secondary: #7fb8d8;
    --text-muted: #4a7a9a;
    
    /* 웨이브폼 - 아이보리 */
    --waveform-bg: #1a2a3a;
    --waveform-color: #d4c8a8;
    --waveform-played: #faf0dc;
    --loop-region: rgba(250, 240, 220, 0.12);
    --loop-border: #f5e6c8;
    
    /* 크기 */
    --radius: 12px;
    --radius-sm: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

.app-container {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
    padding: 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 헤더 */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
}

.header-content h1 {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.sync-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: rgba(0, 229, 199, 0.12);
    border-radius: var(--radius-sm);
    color: var(--primary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sync-btn svg {
    width: 22px;
    height: 22px;
}

.sync-btn:hover {
    background: rgba(0, 229, 199, 0.2);
    transform: rotate(180deg);
}

.sync-btn.syncing svg {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 파일 목록 섹션 */
.file-list-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--card-border);
}

.section-header h2 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.file-count {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.file-list {
    max-height: 200px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-dark) transparent;
}

.file-list::-webkit-scrollbar {
    width: 5px;
}

.file-list::-webkit-scrollbar-thumb {
    background: var(--primary-dark);
    border-radius: 3px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.2s ease;
    border-bottom: 1px solid rgba(0, 229, 199, 0.05);
}

.file-item:last-child {
    border-bottom: none;
}

.file-item:hover {
    background: rgba(0, 229, 199, 0.08);
}

.file-item.active {
    background: rgba(0, 229, 199, 0.12);
}

.file-icon {
    font-size: 1.1rem;
}

.file-name {
    flex: 1;
    font-size: 0.88rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.loading {
    padding: 24px;
    text-align: center;
    color: var(--text-muted);
}

/* 플레이어 섹션 */
.player-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.player-section.hidden {
    display: none;
}

/* ========================================
   웨이브폼 + A-B 구간 선택
   ======================================== */

.waveform-wrapper {
    position: relative;
    padding-top: 40px;
    padding-bottom: 8px;
}

/* 현재 재생 시간 말풍선 */
.current-time-bubble {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.95);
    color: #0a1929;
    padding: 5px 14px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    z-index: 10;
    pointer-events: none;
}

.current-time-bubble::after {
    content: '';
    position: absolute;
    bottom: -7px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-top: 7px solid rgba(255, 255, 255, 0.95);
}

/* 트랙 이름 */
.track-name-overlay {
    position: absolute;
    top: 50px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 500;
    z-index: 5;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
    white-space: nowrap;
    pointer-events: none;
}

/* 웨이브폼 컨테이너 */
.waveform-container {
    position: relative;
    height: 110px;
    background: var(--waveform-bg);
    border-radius: var(--radius-sm);
    overflow: visible;
    cursor: pointer;
    touch-action: none;
}

#waveformCanvas {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-sm);
}

/* 현재 재생 위치 라인 */
.playhead {
    position: absolute;
    top: -6px;
    left: 0;
    width: 2px;
    height: calc(100% + 12px);
    background: #fff;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
    pointer-events: none;
    z-index: 4;
}

/* A-B 구간 영역 */
.loop-region {
    position: absolute;
    top: 0;
    height: 100%;
    background: var(--loop-region);
    pointer-events: none;
    z-index: 1;
}

/* A-B 마커 (드래그 가능한 세로 막대) */
.loop-marker {
    position: absolute;
    top: -10px;
    width: 8px;
    height: calc(100% + 20px);
    background: var(--primary);
    border-radius: 4px;
    cursor: ew-resize;
    z-index: 6;
    touch-action: none;
    box-shadow: 0 0 15px rgba(0, 229, 199, 0.7);
    transition: transform 0.1s, box-shadow 0.2s;
    transform: translateX(-50%);
}

.loop-marker:hover,
.loop-marker.dragging {
    background: var(--primary-light);
    box-shadow: 0 0 25px rgba(0, 229, 199, 1);
    transform: translateX(-50%) scaleX(1.3);
}

/* 마커 라벨 */
.marker-label {
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #0a1929;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    white-space: nowrap;
}

/* 시간 표시 (하단) */
.time-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 4px;
    margin-top: 10px;
}

.time-edge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    color: var(--text-secondary);
    min-width: 55px;
}

.time-edge.end {
    text-align: right;
}

.loop-time-center {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 500;
}

/* 메인 컨트롤 */
.controls-main {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-top: 8px;
}

.control-btn {
    width: 52px;
    height: 52px;
    border: none;
    background: rgba(0, 229, 199, 0.1);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn svg {
    width: 26px;
    height: 26px;
}

.control-btn:hover {
    background: rgba(0, 229, 199, 0.2);
    transform: scale(1.05);
}

.control-btn:active {
    transform: scale(0.95);
}

.play-btn {
    width: 72px;
    height: 72px;
    border: none;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    color: #0a1929;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 24px rgba(0, 229, 199, 0.5);
}

.play-btn svg {
    width: 32px;
    height: 32px;
}

.play-btn .play-icon {
    margin-left: 4px;
}

.play-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 32px rgba(0, 229, 199, 0.6);
}

.play-btn:active {
    transform: scale(0.95);
}

.play-btn svg.hidden {
    display: none;
}

/* 구간 반복 컨트롤 (심플) */
.loop-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.loop-toggle-btn {
    width: 100px;
    height: 48px;
    border: 2px solid var(--secondary);
    background: transparent;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 0.85rem;
}

.loop-toggle-btn svg {
    width: 18px;
    height: 18px;
}

.loop-toggle-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.loop-toggle-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #0a1929;
}

.reset-btn {
    width: 48px;
    height: 48px;
    border: 1px solid rgba(255, 100, 100, 0.3);
    background: rgba(255, 100, 100, 0.08);
    border-radius: var(--radius-sm);
    color: #ff7777;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.reset-btn:hover {
    background: rgba(255, 100, 100, 0.15);
    border-color: rgba(255, 100, 100, 0.5);
}

/* 속도 조절 */
.speed-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.speed-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    min-width: 30px;
}

.speed-buttons {
    display: flex;
    gap: 6px;
    flex: 1;
}

.speed-btn {
    flex: 1;
    height: 36px;
    border: 1px solid rgba(0, 229, 199, 0.2);
    background: transparent;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    cursor: pointer;
    transition: all 0.2s ease;
}

.speed-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.speed-btn.active {
    background: rgba(0, 229, 199, 0.15);
    border-color: var(--primary);
    color: var(--primary);
}

/* 볼륨 */
.volume-control {
    display: flex;
    align-items: center;
    gap: 12px;
}

.volume-icon {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
}

#volumeSlider {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(0, 229, 199, 0.2);
    border-radius: 3px;
    cursor: pointer;
}

#volumeSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 229, 199, 0.5);
}

#volumeSlider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 229, 199, 0.5);
}

/* 반응형 */
@media (max-width: 480px) {
    .app-container {
        padding: 10px;
        gap: 12px;
    }
    
    .header {
        padding: 12px 14px;
    }
    
    .header-content h1 {
        font-size: 1.2rem;
    }
    
    .player-section {
        padding: 14px;
    }
    
    .waveform-container {
        height: 100px;
    }
    
    .play-btn {
        width: 64px;
        height: 64px;
    }
    
    .control-btn {
        width: 46px;
        height: 46px;
    }
    
    .speed-btn {
        font-size: 0.7rem;
        height: 34px;
    }
    
    .loop-marker {
        width: 12px;
    }
}

/* 터치 피드백 */
@media (hover: none) {
    .file-item:active {
        background: rgba(0, 229, 199, 0.15);
    }
    
    .control-btn:active,
    .speed-btn:active {
        transform: scale(0.95);
    }
    
    .loop-marker {
        width: 14px;
    }
}