/* =============================================
   ScoreShift — MusicXML 조옮김 앱
   Warm Sage / Woody 디자인 · 모바일+데스크톱 반응형
   ============================================= */

:root {
  /* ── Warm Sage & Clay 팔레트 ── */
  --sage:        #6E8B6E;   /* primary */
  --sage-deep:   #54705A;
  --sage-soft:   #E6EFE4;
  --sage-tint:   #F0F5EE;

  --clay:        #C07B52;   /* warm accent (copper/terracotta) */
  --clay-deep:   #A8623C;
  --clay-soft:   #F6E7DA;

  --honey:       #D9A441;   /* highlight gold */
  --honey-soft:  #FBF1DA;

  --danger:      #C0584F;
  --danger-soft: #F8E7E3;

  /* ── 표면 ── */
  --bg:          #F6F1E7;   /* warm cream app background */
  --surface:     #FFFDF8;   /* warm white cards */
  --surface-2:   #EFE8D9;
  --border:      #E7DFCD;   /* warm border */
  --border-soft: #F0EADD;

  --text-1:      #2F2A22;   /* warm ink */
  --text-2:      #7A7160;
  --text-3:      #A89C84;

  /* ── 그림자 (따뜻한 톤) ── */
  --sh-sm:  0 1px 3px rgba(74,58,38,.06), 0 1px 2px rgba(74,58,38,.05);
  --sh-md:  0 6px 20px rgba(74,58,38,.10);
  --sh-lg:  0 14px 40px rgba(74,58,38,.16);
  --sh-sage:0 10px 26px rgba(84,112,90,.30);
  --sh-clay:0 10px 26px rgba(168,98,60,.28);

  --r-sm:  12px;
  --r-md:  18px;
  --r-lg:  26px;
  --r-full:9999px;
  --ease:  0.24s cubic-bezier(.4,0,.2,1);

  --font:  'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Gowun Batang', 'Noto Sans KR', serif;

  --app-w:    430px;
  --bar-h:    44px;
  --nav-h:    78px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  color:var(--text-1);
  min-height:100vh;
  display:flex;
  justify-content:center;
  overflow:hidden;
  /* 프레임 뒤로 보이는 따뜻한 우디 배경 */
  background:
    radial-gradient(900px 700px at 12% -10%, #3F5142 0%, transparent 55%),
    radial-gradient(900px 700px at 110% 110%, #6E5238 0%, transparent 55%),
    linear-gradient(160deg, #34402F 0%, #2C2A23 100%);
}
button{cursor:pointer;border:none;background:none;font-family:inherit;color:inherit}
input{font-family:inherit}
a{color:inherit;text-decoration:none}
.hidden{display:none!important}

/* ── 앱 쉘 ── */
#app-shell{
  width:100%;
  max-width:var(--app-w);
  height:100dvh;
  height:100vh;
  background:var(--bg);
  display:flex;
  flex-direction:column;
  overflow:hidden;
  position:relative;
}

/* 태블릿 이상: 떠 있는 폰 프레임 */
@media(min-width:480px) and (max-width:879px){
  body{align-items:center;padding:24px 0}
  #app-shell{
    height:calc(100dvh - 48px);
    height:calc(100vh - 48px);
    border-radius:40px;
    box-shadow:0 30px 80px rgba(0,0,0,.45), 0 0 0 10px rgba(255,255,255,.04);
    overflow:hidden;
  }
}

/* ── 상태바 (모바일 전용 장식) ── */
#status-bar{
  height:var(--bar-h);
  background:var(--surface);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 22px;
  flex-shrink:0;
  border-bottom:1px solid var(--border-soft);
  font-size:14px;
  font-weight:600;
  color:var(--text-1);
}
.status-icons{display:flex;gap:8px;font-size:13px;color:var(--text-2)}

/* ── 화면 컨테이너 ── */
#screen-container{flex:1;overflow:hidden;position:relative}

.screen{
  position:absolute;
  inset:0;
  display:flex;
  flex-direction:column;
  opacity:0;
  transform:translateX(24px) scale(.99);
  pointer-events:none;
  transition:opacity var(--ease),transform var(--ease);
}
.screen.active{opacity:1;transform:none;pointer-events:all}

/* ── 공통 헤더 ── */
.nav-header{
  height:60px;
  background:var(--surface);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 14px;
  flex-shrink:0;
  border-bottom:1px solid var(--border-soft);
}
.nav-title{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:-.2px}

/* ── 스크롤 콘텐츠 ── */
.scroll-content{
  flex:1;
  overflow-y:auto;
  padding:22px 18px 120px;
  -webkit-overflow-scrolling:touch;
}
::-webkit-scrollbar{width:0;height:0}

/* ── 아이콘 버튼 ── */
.icon-btn{
  width:40px;height:40px;
  border-radius:var(--r-full);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;color:var(--text-1);
  transition:background var(--ease),color var(--ease);
  flex-shrink:0;
}
.icon-btn:hover{background:var(--surface-2)}
.icon-btn:active{background:var(--border)}

/* ================================================
   홈 화면
   ================================================ */
.home-header{
  background:var(--surface);
  padding:16px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:1px solid var(--border-soft);
  flex-shrink:0;
}
.home-brand{display:flex;align-items:center;gap:12px}
.brand-icon{
  width:46px;height:46px;
  background:linear-gradient(140deg,var(--clay),var(--clay-deep));
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:20px;
  box-shadow:var(--sh-clay);
}
.home-brand h1{font-family:var(--font-display);font-size:21px;font-weight:700;letter-spacing:-.3px}
.home-brand p{font-size:12px;color:var(--text-2);margin-top:1px}

/* 히어로 카드 */
.hero-card{
  background:
    radial-gradient(140% 120% at 0% 0%, rgba(255,255,255,.16) 0%, transparent 45%),
    linear-gradient(145deg,var(--sage) 0%,var(--sage-deep) 55%,#3F5742 100%);
  border-radius:var(--r-lg);
  padding:38px 26px;
  color:#fff;
  cursor:pointer;
  position:relative;
  overflow:hidden;
  margin-bottom:22px;
  box-shadow:var(--sh-sage);
  transition:transform var(--ease),box-shadow var(--ease);
}
.hero-card:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(84,112,90,.38)}
.hero-card:active{transform:scale(.99)}
.hero-bg-circle{
  position:absolute;border-radius:50%;
  background:rgba(255,255,255,.06);
  pointer-events:none;
}
.hero-bg-circle.c1{width:190px;height:190px;top:-56px;right:-46px;
  background:radial-gradient(circle, rgba(214,164,67,.28) 0%, transparent 70%)}
.hero-bg-circle.c2{width:250px;height:250px;bottom:-90px;left:-70px}
.hero-inner{position:relative;z-index:1;text-align:center}
.hero-icon{
  width:74px;height:74px;margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;
  font-size:34px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);
  border-radius:20px;
  backdrop-filter:blur(6px);
}
.hero-card h2{font-family:var(--font-display);font-size:24px;font-weight:700;margin-bottom:10px;letter-spacing:-.3px}
.hero-card p{font-size:14px;opacity:.9;line-height:1.65;margin-bottom:22px}
.hero-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.34);
  backdrop-filter:blur(10px);
  padding:13px 26px;border-radius:var(--r-full);
  font-size:15px;font-weight:600;
  transition:background var(--ease);
}
.hero-card:hover .hero-cta{background:rgba(255,255,255,.26)}

/* 사용 방법 */
.how-section{
  background:var(--surface);
  border-radius:var(--r-md);
  padding:22px;
  margin-bottom:16px;
  border:1px solid var(--border);
  box-shadow:var(--sh-sm);
}
.section-title{font-size:15px;font-weight:700;color:var(--text-1);margin-bottom:18px;letter-spacing:-.2px}
.how-steps{display:flex;flex-direction:column;gap:0}
.how-step{display:flex;align-items:center;gap:14px}
.how-num{
  width:34px;height:34px;
  background:var(--sage-soft);
  color:var(--sage-deep);
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;
  flex-shrink:0;
}
.how-text{display:flex;flex-direction:column;gap:2px}
.how-text strong{font-size:14px;font-weight:600;color:var(--text-1)}
.how-text span{font-size:12px;color:var(--text-2)}
.how-arrow{
  font-size:11px;color:var(--clay);
  padding:7px 0 7px 11px;
}

/* 안내 박스 */
.info-box{
  display:flex;align-items:flex-start;gap:13px;
  background:linear-gradient(135deg,var(--honey-soft),#FCF6E8);
  border-radius:var(--r-md);
  padding:17px;
  margin-bottom:22px;
  border:1px solid #EDD9A8;
}
.info-box-icon{font-size:20px;color:var(--clay);flex-shrink:0;margin-top:1px}
.info-box-text{display:flex;flex-direction:column;gap:3px}
.info-box-text strong{font-size:14px;font-weight:700;color:#7A5A22}
.info-box-text span{font-size:13px;color:#9A7838;line-height:1.55}

/* 섹션 타이틀 행 */
.section-title-row{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:12px;
}
.text-btn{font-size:13px;color:var(--clay-deep);font-weight:600;display:flex;align-items:center;gap:4px;transition:opacity var(--ease)}
.text-btn:hover{opacity:.7}

/* ================================================
   업로드 화면
   ================================================ */
.drop-zone{
  border:2px dashed var(--border);
  border-radius:var(--r-lg);
  background:var(--surface);
  cursor:pointer;
  transition:border-color var(--ease),background var(--ease),transform var(--ease);
  margin-bottom:16px;
  overflow:hidden;
}
.drop-zone:hover,.drop-zone.drag-over{
  border-color:var(--sage);
  background:var(--sage-tint);
}
.drop-zone.drag-over{transform:scale(1.01)}
.drop-zone-content{
  padding:40px 22px;
  text-align:center;
}
.drop-icon{
  width:76px;height:76px;
  background:var(--sage-soft);
  border-radius:20px;
  display:flex;align-items:center;justify-content:center;
  font-size:32px;color:var(--sage-deep);
  margin:0 auto 18px;
  transition:background var(--ease),transform var(--ease);
}
.drop-zone:hover .drop-icon,.drop-zone.drag-over .drop-icon{background:#D6E5D2;transform:translateY(-2px)}
.drop-zone-content h3{font-size:16px;font-weight:700;color:var(--text-1);margin-bottom:8px;line-height:1.5}
.drop-zone-content p{font-size:13px;color:var(--text-2);margin-bottom:16px}
.drop-badges{display:flex;justify-content:center}
.badge-xml{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--clay-soft);color:var(--clay-deep);
  padding:7px 15px;border-radius:var(--r-full);
  font-size:13px;font-weight:600;
}

/* 파일 정보 카드 */
.file-info-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  padding:15px 16px;
  display:flex;align-items:center;gap:14px;
  margin-bottom:14px;
  box-shadow:var(--sh-sm);
}
.file-info-icon{
  width:48px;height:48px;
  background:var(--clay-soft);color:var(--clay-deep);
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;flex-shrink:0;
}
.file-info-text{flex:1;min-width:0}
.fi-name{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fi-meta{font-size:12px;color:var(--text-2);margin-top:3px}
.remove-btn{
  width:36px;height:36px;
  border-radius:var(--r-full);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-2);font-size:15px;
  flex-shrink:0;
  transition:background var(--ease),color var(--ease);
}
.remove-btn:hover{background:var(--danger-soft);color:var(--danger)}

/* 악보 정보 카드 */
.score-info-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  padding:18px;
  margin-bottom:14px;
  box-shadow:var(--sh-sm);
}
.score-info-card h4{
  font-size:14px;font-weight:700;
  color:var(--text-1);margin-bottom:15px;
  display:flex;align-items:center;gap:7px;
}
.score-info-card h4 i{color:var(--sage)}
.score-info-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
}
.score-info-item{
  display:flex;flex-direction:column;gap:4px;
  background:var(--sage-tint);
  border-radius:12px;
  padding:11px 13px;
}
.si-label{font-size:10.5px;color:var(--text-3);font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.si-value{font-size:14px;font-weight:600;color:var(--text-1)}

/* 조옮김 설정 */
.transpose-section{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  padding:22px;
  margin-bottom:16px;
  box-shadow:var(--sh-sm);
}
.form-label{
  display:flex;align-items:center;gap:8px;
  font-size:14px;font-weight:700;
  color:var(--text-1);margin-bottom:16px;
}
.form-label i{color:var(--sage)}

/* 모드 탭 */
.mode-tabs{
  display:flex;
  background:var(--surface-2);
  border-radius:13px;
  padding:4px;
  margin-bottom:18px;
}
.mode-tab{
  flex:1;padding:10px;
  border-radius:10px;
  font-size:13px;font-weight:500;
  color:var(--text-2);
  transition:all var(--ease);
}
.mode-tab.active{
  background:var(--surface);
  color:var(--sage-deep);
  font-weight:700;
  box-shadow:var(--sh-sm);
}

/* 조성 선택 행 */
.key-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.key-col{flex:1}
.key-col-label{display:block;font-size:11px;color:var(--text-2);font-weight:600;margin-bottom:6px}
.req{color:var(--danger)}
.key-arrow-big{
  font-size:15px;color:var(--clay);
  margin-top:20px;flex-shrink:0;
}
.key-badge{
  width:100%;
  background:var(--surface-2);
  border:1.5px solid var(--border);
  border-radius:13px;
  padding:12px 13px;
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;font-weight:600;
  transition:border-color var(--ease),background var(--ease);
}
.key-badge:hover{border-color:var(--sage)}
.key-badge i{color:var(--text-3);font-size:12px}
.target-badge{
  border-color:var(--sage);
  background:var(--sage-soft);
  color:var(--sage-deep);
}
.target-badge i{color:var(--sage)}
.target-badge.picked{
  background:linear-gradient(140deg,var(--sage),var(--sage-deep));
  color:#fff;border-color:transparent;
}
.target-badge.picked i{color:rgba(255,255,255,.85)}
.semitone-preview{
  display:flex;align-items:center;gap:8px;
  background:var(--clay-soft);
  border-radius:12px;
  padding:11px 14px;
  font-size:13px;font-weight:600;color:var(--clay-deep);
  margin-top:6px;
}

/* 반음 직접 입력 */
.semi-input-wrap{
  display:flex;align-items:center;justify-content:center;gap:22px;
  margin-bottom:10px;
}
.semi-btn{
  width:50px;height:50px;
  background:var(--sage-soft);
  color:var(--sage-deep);
  border-radius:50%;
  font-size:18px;
  display:flex;align-items:center;justify-content:center;
  transition:background var(--ease),transform var(--ease);
}
.semi-btn:hover{background:#D6E5D2}
.semi-btn:active{transform:scale(.92)}
.semi-display{min-width:96px;text-align:center}
#semi-num{
  display:block;font-family:var(--font-display);font-size:46px;font-weight:700;
  color:var(--sage-deep);line-height:1;
}
.semi-unit{font-size:14px;color:var(--text-2)}
.semi-hint{text-align:center;font-size:13px;color:var(--text-2);margin-bottom:16px}
.semi-quick{
  display:flex;flex-wrap:wrap;gap:6px;justify-content:center;
}
.semi-quick button{
  padding:7px 11px;
  border-radius:var(--r-full);
  font-size:13px;font-weight:600;
  background:var(--surface-2);
  color:var(--text-2);
  border:1.5px solid var(--border);
  transition:all var(--ease);
}
.semi-quick button:hover{background:var(--sage-tint);border-color:var(--sage);color:var(--sage-deep)}
.semi-quick button.zero{background:var(--sage-soft);border-color:var(--sage);color:var(--sage-deep)}

/* 변환 버튼 */
.btn-convert{
  width:100%;padding:18px;
  border-radius:var(--r-md);
  font-size:16px;font-weight:700;
  display:flex;align-items:center;justify-content:center;gap:10px;
  margin-bottom:20px;
}
.btn-primary{
  background:linear-gradient(140deg,var(--clay),var(--clay-deep));
  color:#fff;
  box-shadow:var(--sh-clay);
  border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;
  transition:opacity var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary:hover{box-shadow:0 14px 30px rgba(168,98,60,.36);transform:translateY(-1px)}
.btn-primary:active{transform:scale(.98);opacity:.95}
.btn-primary:disabled{
  background:var(--surface-2);color:var(--text-3);
  box-shadow:none;cursor:not-allowed;transform:none;
}

/* 가이드 박스 */
.guide-box{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-sm);
}
.guide-header{
  padding:16px 18px;
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;font-weight:600;color:var(--text-1);
  cursor:pointer;
  transition:background var(--ease);
}
.guide-header:hover{background:var(--sage-tint)}
.guide-header i.fas.fa-circle-question{color:var(--sage);margin-right:8px}
.guide-chevron{transition:transform var(--ease);color:var(--text-3)}
.guide-chevron.open{transform:rotate(180deg)}
.guide-body{padding:0 18px 16px}
.guide-step{
  display:flex;flex-direction:column;gap:3px;
  padding:11px 0;
  border-bottom:1px solid var(--border-soft);
}
.guide-step:last-of-type{border-bottom:none;padding-bottom:4px}
.guide-step strong{font-size:14px;font-weight:600;color:var(--text-1)}
.guide-step span{font-size:13px;color:var(--text-2)}
.guide-link{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:14px;
  padding:10px 16px;border-radius:var(--r-full);
  background:var(--sage-soft);
  font-size:13px;font-weight:600;color:var(--sage-deep);
  transition:background var(--ease);
}
.guide-link:hover{background:#D6E5D2}

/* ================================================
   결과 화면
   ================================================ */
.result-banner{
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(214,164,67,.25) 0%, transparent 50%),
    linear-gradient(145deg,var(--sage),var(--sage-deep));
  border-radius:var(--r-lg);
  padding:32px 22px;
  text-align:center;
  color:#fff;
  margin-bottom:20px;
  box-shadow:var(--sh-sage);
}
.result-check{
  width:68px;height:68px;
  background:rgba(255,255,255,.22);
  border:1px solid rgba(255,255,255,.3);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:30px;
  margin:0 auto 16px;
}
.result-banner h2{font-family:var(--font-display);font-size:25px;font-weight:700;margin-bottom:6px}
.result-banner p{font-size:14px;opacity:.92}

/* 결과 정보 */
.result-info-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  margin-bottom:16px;
  box-shadow:var(--sh-sm);
  overflow:hidden;
}
.ric-row{
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 18px;
}
.ric-label{font-size:13px;color:var(--text-2);display:flex;align-items:center;gap:8px}
.ric-label i{color:var(--text-3);width:16px;text-align:center}
.ric-value{font-size:14px;font-weight:600;color:var(--text-1);max-width:55%;text-align:right;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ric-value.highlight{color:var(--clay-deep);font-weight:700}
.ric-divider{height:1px;background:var(--border-soft);margin:0 18px}

/* 다운로드 버튼 메인 */
.btn-download-main{
  width:100%;
  background:linear-gradient(140deg,var(--clay),var(--clay-deep));
  border-radius:var(--r-md);
  padding:18px 20px;
  display:flex;align-items:center;gap:16px;
  color:#fff;
  margin-bottom:16px;
  box-shadow:var(--sh-clay);
  transition:transform var(--ease),box-shadow var(--ease);
}
.btn-download-main:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(168,98,60,.38)}
.btn-download-main:active{transform:scale(.99)}
.btn-dl-icon{
  width:48px;height:48px;
  background:rgba(255,255,255,.2);
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:22px;flex-shrink:0;
}
.btn-dl-info{flex:1;text-align:left}
.btn-dl-title{display:block;font-size:16px;font-weight:700}
.btn-dl-sub{display:block;font-size:12px;opacity:.88;margin-top:2px}
.btn-dl-arrow{font-size:14px;opacity:.75}

/* 열기 안내 */
.open-guide{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  padding:20px;
  margin-bottom:16px;
  box-shadow:var(--sh-sm);
}
.open-guide h4{
  font-size:14px;font-weight:700;
  display:flex;align-items:center;gap:7px;
  margin-bottom:18px;
}
.open-guide h4 i{color:var(--honey)}
.open-guide-steps{
  display:flex;align-items:center;justify-content:center;
  gap:8px;
}
.og-step{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  flex:1;text-align:center;
}
.og-step i{
  width:46px;height:46px;
  background:var(--sage-soft);
  color:var(--sage-deep);
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;
}
.og-step span{font-size:11px;color:var(--text-2);line-height:1.4}
.og-arrow{font-size:12px;color:var(--clay);flex-shrink:0}

/* 결과 액션 */
.result-actions{display:flex;flex-direction:column;gap:10px}
.btn-secondary{
  width:100%;padding:15px;
  border-radius:var(--r-md);
  border:1.5px solid var(--sage);
  color:var(--sage-deep);
  font-size:15px;font-weight:700;
  display:flex;align-items:center;justify-content:center;gap:8px;
  transition:background var(--ease);
}
.btn-secondary:hover{background:var(--sage-tint)}
.btn-ghost{
  width:100%;padding:15px;
  border-radius:var(--r-md);
  color:var(--text-2);
  font-size:15px;font-weight:600;
  display:flex;align-items:center;justify-content:center;gap:8px;
  transition:background var(--ease);
}
.btn-ghost:hover{background:var(--surface-2)}

/* ================================================
   히스토리 화면
   ================================================ */
.history-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  padding:15px 16px;
  margin-bottom:10px;
  display:flex;align-items:center;gap:14px;
  cursor:pointer;
  box-shadow:var(--sh-sm);
  transition:all var(--ease);
}
.history-card:hover{transform:translateY(-1px);box-shadow:var(--sh-md);border-color:var(--sage)}
.history-card:active{transform:scale(.99)}
.hc-icon{
  width:48px;height:48px;
  background:var(--clay-soft);color:var(--clay-deep);
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;flex-shrink:0;
}
.hc-info{flex:1;min-width:0}
.hc-name{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:6px}
.hc-meta{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.hc-key{
  font-size:12px;font-weight:600;
  color:var(--sage-deep);background:var(--sage-soft);
  padding:3px 9px;border-radius:var(--r-full);
}
.hc-date{font-size:12px;color:var(--text-3)}
.hc-arrow{color:var(--text-3);font-size:13px;flex-shrink:0}

/* 빈 상태 */
.empty-state{text-align:center;padding:64px 24px}
.empty-icon{
  width:84px;height:84px;
  background:var(--sage-soft);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:36px;color:var(--sage);
  margin:0 auto 22px;
}
.empty-state h3{font-size:18px;font-weight:700;margin-bottom:8px}
.empty-state p{font-size:14px;color:var(--text-2);line-height:1.7;margin-bottom:24px}
.empty-state .btn-primary{padding:14px 28px;display:inline-flex}

/* ================================================
   하단 네비 (모바일) → 사이드바 (데스크톱)
   ================================================ */
#bottom-nav{
  height:var(--nav-h);
  background:var(--surface);
  border-top:1px solid var(--border);
  display:flex;align-items:center;
  justify-content:space-evenly;
  padding:0 16px;
  padding-bottom:env(safe-area-inset-bottom,0);
  flex-shrink:0;
  position:relative;z-index:10;
}
.side-brand,.side-foot{display:none}   /* 데스크톱에서만 표시 */
.side-nav{display:contents}            /* 모바일에선 nav-item이 직접 정렬 */
.nav-item{
  flex:1;
  display:flex;flex-direction:column;
  align-items:center;gap:4px;
  padding:8px;
  color:var(--text-3);
  font-size:11px;font-weight:600;
  transition:color var(--ease);
  border-radius:var(--r-sm);
}
.nav-item i{font-size:22px}
.nav-item.active{color:var(--sage-deep)}
.nav-upload-label{display:none}
.nav-fab{
  width:56px;height:56px;
  background:linear-gradient(140deg,var(--clay),var(--clay-deep));
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:22px;
  box-shadow:var(--sh-clay);
  margin-top:-18px;
  transition:transform var(--ease);
}
.nav-item:hover .nav-fab{transform:scale(1.05)}
.nav-item:active .nav-fab{transform:scale(.94)}

/* ================================================
   조성 선택 바텀시트
   ================================================ */
.sheet-overlay{
  position:fixed;inset:0;
  background:rgba(47,42,34,.5);
  z-index:100;
  display:flex;align-items:flex-end;justify-content:center;
  backdrop-filter:blur(4px);
}
.sheet-body{
  background:var(--bg);
  border-radius:28px 28px 0 0;
  width:100%;max-width:var(--app-w);
  max-height:82vh;overflow-y:auto;
  padding:12px 22px 40px;
  box-shadow:0 -10px 40px rgba(47,42,34,.2);
  animation:slideUp .3s cubic-bezier(.4,0,.2,1);
}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
.sheet-handle{
  width:42px;height:4px;
  background:var(--border);border-radius:var(--r-full);
  margin:0 auto 18px;
}
.sheet-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:18px;
}
.sheet-header h3{font-family:var(--font-display);font-size:19px;font-weight:700}

/* 자동 감지 버튼 */
.auto-btn{
  width:100%;
  background:var(--sage-soft);
  border:1.5px solid var(--sage);
  border-radius:var(--r-md);
  padding:15px 16px;
  display:flex;align-items:center;gap:12px;
  margin-bottom:16px;
  cursor:pointer;
  text-align:left;
}
.auto-btn-icon{
  width:42px;height:42px;
  background:linear-gradient(140deg,var(--sage),var(--sage-deep));
  color:#fff;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;flex-shrink:0;
}
.auto-btn-title{display:block;font-size:15px;font-weight:700;color:var(--text-1)}
.auto-btn-sub{display:block;font-size:12px;color:var(--text-2);margin-top:2px}
.auto-check{color:var(--sage-deep);margin-left:auto;font-size:16px}
.sheet-divider{
  display:flex;align-items:center;gap:10px;
  font-size:12px;color:var(--text-3);
  margin-bottom:16px;
}
.sheet-divider::before,.sheet-divider::after{
  content:'';flex:1;height:1px;background:var(--border);
}

/* 탭 */
.sheet-tabs{
  display:flex;
  background:var(--surface-2);
  border-radius:13px;padding:4px;
  margin-bottom:16px;
}
.sheet-tab{
  flex:1;padding:10px;border-radius:10px;
  font-size:14px;font-weight:500;color:var(--text-2);
  transition:all var(--ease);
}
.sheet-tab.active{
  background:var(--surface);color:var(--sage-deep);
  font-weight:700;box-shadow:var(--sh-sm);
}

/* 조성 그리드 */
.key-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:8px;
  padding-bottom:8px;
}
.kg-btn{
  background:var(--surface);
  border:1.5px solid var(--border);
  border-radius:14px;
  padding:13px 6px;
  text-align:center;cursor:pointer;
  transition:all var(--ease);
}
.kg-btn:hover{border-color:var(--sage);background:var(--sage-tint);transform:translateY(-1px)}
.kg-btn.selected{background:linear-gradient(140deg,var(--sage),var(--sage-deep));border-color:transparent}
.kg-symbol{display:block;font-family:var(--font-display);font-size:18px;font-weight:700;color:var(--text-1);margin-bottom:3px}
.kg-name{display:block;font-size:10px;color:var(--text-2);line-height:1.3}
.kg-btn.selected .kg-symbol,.kg-btn.selected .kg-name{color:#fff}

/* ================================================
   확인 모달
   ================================================ */
.modal-overlay{
  position:fixed;inset:0;
  background:rgba(47,42,34,.5);
  z-index:200;
  display:flex;align-items:center;justify-content:center;
  backdrop-filter:blur(4px);
}
.modal-box{
  background:var(--surface);
  border-radius:var(--r-lg);
  width:calc(100% - 48px);max-width:340px;
  padding:30px 26px;text-align:center;
  box-shadow:var(--sh-lg);
  animation:scaleIn .22s cubic-bezier(.4,0,.2,1);
}
@keyframes scaleIn{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}
.modal-icon-wrap{
  width:66px;height:66px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:28px;margin:0 auto 16px;
}
.modal-icon-wrap.danger{background:var(--danger-soft);color:var(--danger)}
.modal-box h3{font-size:18px;font-weight:700;margin-bottom:8px}
.modal-box p{font-size:14px;color:var(--text-2);line-height:1.6;margin-bottom:24px}
.modal-btns{display:flex;gap:10px}
.modal-cancel{
  flex:1;padding:14px;border-radius:var(--r-md);
  background:var(--surface-2);
  font-size:15px;font-weight:700;color:var(--text-2);
  transition:background var(--ease);
}
.modal-cancel:hover{background:var(--border)}
.btn-danger{
  flex:1;padding:14px;border-radius:var(--r-md);
  background:var(--danger);color:#fff;
  font-size:15px;font-weight:700;
  transition:opacity var(--ease);
}
.btn-danger:hover{opacity:.9}

/* ================================================
   토스트
   ================================================ */
.toast{
  position:fixed;
  bottom:calc(var(--nav-h) + 16px);
  left:50%;
  transform:translateX(-50%) translateY(60px);
  background:rgba(47,42,34,.96);
  color:#fff;
  padding:13px 22px;
  border-radius:var(--r-full);
  font-size:14px;font-weight:600;
  display:flex;align-items:center;gap:9px;
  z-index:300;
  opacity:0;
  box-shadow:var(--sh-lg);
  transition:transform .3s cubic-bezier(.4,0,.2,1),opacity .3s;
  white-space:nowrap;
  max-width:calc(100vw - 32px);
}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}
#toast-icon{color:#9FC79A}

/* ================================================
   데스크톱 레이아웃 (사이드바 + 넓은 콘텐츠)
   ================================================ */
@media(min-width:880px){
  body{align-items:center;padding:28px}

  #app-shell{
    max-width:1160px;
    width:100%;
    height:calc(100vh - 56px);
    max-height:860px;
    border-radius:30px;
    box-shadow:0 40px 100px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.05);
    /* 그리드: 좌측 사이드바 + 우측 콘텐츠 */
    display:grid;
    grid-template-columns:264px 1fr;
  }

  /* 가짜 상태바 숨김 */
  #status-bar{display:none}

  /* 콘텐츠 영역 */
  #screen-container{grid-column:2;grid-row:1;border-radius:0 30px 30px 0;overflow:hidden}
  .scroll-content{padding:40px 48px 56px}
  /* 콘텐츠를 가운데 정렬하고 최대폭 제한 */
  .scroll-content > *{max-width:760px;margin-left:auto;margin-right:auto}
  .nav-header{padding:0 28px;height:68px}
  .home-header{padding:20px 36px}

  /* 큰 화면에서 살짝 더 여유로운 히어로 */
  .hero-card{padding:48px 40px}
  .hero-icon{width:84px;height:84px;font-size:40px}
  .hero-card h2{font-size:28px}

  /* 악보 정보 3열 */
  .score-info-grid{grid-template-columns:repeat(3,1fr)}

  /* ── 사이드바 ── */
  #bottom-nav{
    grid-column:1;grid-row:1;
    height:100%;
    flex-direction:column;
    justify-content:flex-start;
    align-items:stretch;
    gap:6px;
    padding:28px 18px;
    border-top:none;
    border-right:1px solid var(--border);
    background:linear-gradient(180deg,var(--surface) 0%,#FBF6EC 100%);
    border-radius:30px 0 0 30px;
  }
  .side-brand{
    display:flex;align-items:center;gap:12px;
    padding:6px 8px 22px;
    margin-bottom:8px;
    border-bottom:1px solid var(--border-soft);
  }
  .side-brand-text{display:flex;flex-direction:column;line-height:1.2}
  .side-brand-text strong{font-family:var(--font-display);font-size:19px;font-weight:700;color:var(--text-1)}
  .side-brand-text span{font-size:12px;color:var(--text-2);margin-top:2px}

  .side-nav{display:flex;flex-direction:column;gap:6px}

  .nav-item{
    flex:initial;flex-direction:row;
    justify-content:flex-start;
    gap:14px;
    padding:14px 16px;
    border-radius:14px;
    font-size:15px;font-weight:600;
    color:var(--text-2);
  }
  .nav-item i{font-size:18px;width:22px;text-align:center}
  .nav-item span{font-size:15px}
  .nav-item:hover{background:var(--sage-tint);color:var(--sage-deep)}
  .nav-item.active{background:var(--sage-soft);color:var(--sage-deep)}

  /* 사이드바의 + 버튼: 강조 행 형태로 */
  #nav-upload{
    background:linear-gradient(140deg,var(--clay),var(--clay-deep));
    color:#fff;
    box-shadow:var(--sh-clay);
    margin:4px 0 2px;
  }
  #nav-upload:hover{background:linear-gradient(140deg,var(--clay),var(--clay-deep));color:#fff;transform:translateY(-1px)}
  #nav-upload.active{background:linear-gradient(140deg,var(--clay),var(--clay-deep));color:#fff}
  .nav-fab{
    width:34px;height:34px;font-size:16px;
    margin-top:0;box-shadow:none;
    background:rgba(255,255,255,.22);
  }
  .nav-upload-label{display:inline;font-size:15px;font-weight:700}
  .nav-item:hover .nav-fab,.nav-item:active .nav-fab{transform:none}

  .side-foot{
    display:flex;align-items:flex-start;gap:9px;
    margin-top:auto;
    padding:14px;
    border-radius:14px;
    background:var(--sage-tint);
    font-size:11.5px;color:var(--sage-deep);line-height:1.5;font-weight:500;
  }
  .side-foot i{margin-top:2px;font-size:13px}

  /* 토스트는 콘텐츠 영역 기준 */
  .toast{bottom:32px}

  /* 바텀시트/모달은 화면 중앙 카드로 */
  .sheet-overlay{align-items:center}
  .sheet-body{
    border-radius:24px;
    max-width:460px;
    max-height:80vh;
    padding:24px 26px 30px;
    animation:scaleIn .24s cubic-bezier(.4,0,.2,1);
  }
  .sheet-handle{display:none}
}

/* 아주 큰 화면 대비 */
@media(min-width:1240px){
  #app-shell{max-width:1200px}
}