/* ===== 팔레트 (브라스/골드 + 다크 앱창) =====
   바깥 영역은 기존 그레이/골드 유지, 가운데 프로그램 창만 다크
   Gold: #D4AF37 / Deeper: #B88900 / Soft: #F1D27A
*/

:root {
  --bg-dark: #D8D8DB;      /* 바깥 페이지 배경 유지 */
  --panel: #ECECEF;
  --panel-deep: #CBCBCD;
  --panel-light: #F5F5F6;
  --text-main: #25211E;
  --text-muted: #8B8A89;

  /* Accent (Gold) */
  --accent: #D4AF37;
  --accent-hover: #B88900;
  --accent-soft: #F1D27A;

  --danger: #FF5533;
  --slider-track: #DEDEE1;
  color-scheme: light;
}

/* 기본 레이아웃 (바깥 배경 유지) */
body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: 'Roboto', 'Pretendard', sans-serif;
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

/* 홈 버튼 - 고정 위치 */
.home-button {
  position: fixed;
  top: 90px; /* 메뉴바 아래 */
  left: 20px;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text-main);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 
    0 4px 15px rgba(0, 0, 0, 0.1),
    0 2px 8px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  text-decoration: none;
  min-width: 80px;
  justify-content: center;
}

.home-button:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
  box-shadow: 
    0 8px 25px rgba(0, 0, 0, 0.15),
    0 4px 12px rgba(0, 0, 0, 0.1);
}

.home-button:active {
  transform: translateY(0px);
  box-shadow: 
    0 6px 20px rgba(212, 175, 55, 0.2),
    0 2px 6px rgba(0, 0, 0, 0.15);
}

.home-button i {
  font-size: 16px;
}

.home-button span {
  font-family: 'Poppins', sans-serif;
}

/* === 가운데 프로그램 창: 다크 테마 적용 ===
   - 내부 컴포넌트는 아래 재정의된 변수 사용
   - 스크린샷과 유사한 차콜 그라데이션/얕은 외곽선/내부 하이라이트
*/
.container {
  /* 이 안에서만 다크 팔레트로 변수 재정의 */
  --panel: #121316;
  --panel-light: #17191D;
  --panel-deep: #2A2E35;
  --text-main: #F1F3F6;
  --text-muted: #A2A9B3;

  width: 100%;
  max-width: 600px;  /*가로폭 조절*/
  background:
    radial-gradient(120% 160% at 50% -20%, #2C3038 0%, #1B1E23 55%, #121417 100%);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow:
    0 22px 60px rgba(0,0,0,0.55),
    inset 0 1px 0 rgba(255,255,255,0.04);
  padding: 40px;
  position: relative;
}

/* 상단 은은한 라이트 밴드 */
.container::before{
  content:"";
  position:absolute; inset:0 0 auto 0; height:84px; border-radius:16px 16px 0 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0));
  pointer-events:none;
}

/* 로고 */
.logo-row {
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 35px; gap: 12px;
}
.logo-icon .fa-music {
  font-size: 2.5rem;
  color: var(--accent);
  filter: drop-shadow(0 0 8px rgba(212,175,55,0.45));
}
.logo-text { font-size: 2rem; font-weight: 300; color: var(--text-main); letter-spacing: 2px; }
.logo-text b { font-weight: 700; color: var(--accent); }

/* 줌 컨트롤 */
.zoom-controls {
  position: absolute; top: 15px; right: 15px;
  display: flex; gap: 5px; align-items: center;
}
.zoom-controls button {
  background-color: var(--panel-light);
  border: 1px solid var(--panel-deep);
  color: var(--text-muted);
  width: 30px; height: 30px; border-radius: 8px;
  cursor: pointer; font-size: 0.8rem; transition: all .2s;
}
.zoom-controls button:hover { background-color: #20242A; color: var(--text-main); }
#zoom-reset { width: auto; padding: 0 10px; font-weight: 600; }

/* 폼 요소 */
.form-group { margin-bottom: 25px; }

label {
  display: block; font-size: 0.75rem; color: var(--text-muted);
  margin-bottom: 6px; text-transform: uppercase; letter-spacing: 1px; font-weight: 600;
}

input[type="number"], select {
  width: 100%; padding: 12px 15px; box-sizing: border-box;
  border: 1px solid var(--panel-deep);
  border-radius: 10px; font-size: 1rem;
  background-color: var(--panel-light); color: var(--text-main);
  transition: border-color .3s, box-shadow .3s, background-color .3s;
}

input:focus, select:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px rgba(212,175,55,0.28);
}

/* 2열 그룹 */
.key-mood-group { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* Compose 버튼 (골드 메탈릭) */
#compose {
  width: 100%;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.18), rgba(255,255,255,0) 38%),
    linear-gradient(90deg, #F3D87A 0%, #D4AF37 45%, #B88900 100%);
  color: #2B1E00;
  border: none; border-radius: 10px; padding: 15px;
  font-size: 1.05rem; font-weight: 700; cursor: pointer;
  transition: all .3s;
  box-shadow: 0 6px 20px rgba(212,175,55,0.35), inset 0 0 0 1px rgba(0,0,0,0.06);
  text-transform: uppercase; letter-spacing: 1.5px;
}
#compose:hover {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.22), rgba(255,255,255,0) 40%),
    linear-gradient(90deg, #FFD884 0%, #CDA332 50%, #A97800 100%);
  transform: translateY(-2px);
}

/* 랜덤 버튼 */
#random-chord, #random-sliders {
  background: var(--panel-light);
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 10px 12px; border-radius: 8px; cursor: pointer;
  transition: background-color .3s, color .3s, box-shadow .3s;
}
#random-chord:hover, #random-sliders:hover {
  background-color: var(--accent);
  color: #2B1E00;
  box-shadow: 0 0 0 3px rgba(212,175,55,0.28);
}

#chord-controls { display: flex; gap: 10px; align-items: center; }
#chord { flex-grow: 1; }

/* 멜로디 모드 컨트롤 */
#melody-mode-controls { display: flex; flex-direction: column; gap: 8px; }
#melody-mode {
  width: 100%;
  padding: 12px 16px;
  background-color: var(--panel-light);
  border: 1px solid var(--panel-deep);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
#melody-mode:hover {
  background-color: #20242A;
  border-color: var(--accent-soft);
}
#melody-mode:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(241,210,122,0.28);
}
.mode-description {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 4px;
  font-style: italic;
}

/* 결과 헤더 */
#results h3 { color: var(--accent); margin: 30px 0 15px; text-align: center; font-weight: 700; }

/* 로딩 중인 composition 카드 */
.composition-result.loading {
  position: relative;
  min-height: 100px;
  background: linear-gradient(135deg, #1a1d21 0%, #15181c 100%);
  border: 1px solid rgba(102, 126, 234, 0.3);
  animation: loadingPulse 2s ease-in-out infinite;
}

.composition-result.loading h4 {
  margin-bottom: 20px;
  opacity: 0.8;
}

.loading-spinner-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  padding: 20px 0;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(102, 126, 234, 0.2);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  color: var(--text-secondary);
  font-size: 14px;
  animation: fadeInOut 2s ease-in-out infinite;
}

@keyframes loadingPulse {
  0%, 100% {
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: 0 0 15px rgba(102, 126, 234, 0.1);
  }
  50% {
    border-color: rgba(102, 126, 234, 0.6);
    box-shadow: 0 0 25px rgba(102, 126, 234, 0.2);
  }
}

@keyframes fadeInOut {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* WAV 처리 완료 시 fade-in 효과 */
.composition-result.wav-complete {
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0.7; }
  to { opacity: 1; }
}

/* 스크롤 영역 */
.scrollable-links {
  max-height: 300px; overflow-y: auto; padding-right: 15px;
  border: 1px solid var(--panel-deep); border-radius: 10px;
  background-color: #15181C; padding: 15px; margin-top: 15px;
}

/* === 슬라이더 === */
#slider-controls { display: flex; align-items: center; gap: 10px; }
.slider-group { flex-grow: 1; display: flex; justify-content: space-between; gap: 20px; }
.slider-container { flex: 1; display: flex; flex-direction: column; }
.slider-container label { margin-bottom: 5px; }
.slider-container input[type="range"] { width: 100%; }

input[type="range"] {
  -webkit-appearance: auto; appearance: auto;
  width: 100%; height: 28px; cursor: pointer; background: transparent; border-radius: 8px;
  accent-color: var(--accent-soft); color-scheme: light;
}
input[type="range"]:focus { outline: none; box-shadow: 0 0 0 3px rgba(241,210,122,0.28); }
input[type="range"]:hover { filter: saturate(1.04); }

/* 값 표시 텍스트 */
.slider-container span { text-align: right; font-size: 0.8em; color: var(--text-muted); margin-top: 2px; }

/* Firefox: 트랙/프로그레스 색 명시 */
@supports (-moz-appearance: none) {
  input[type="range"] { appearance: none; -moz-appearance: none; height: 28px; background: transparent; }
  input[type="range"]::-moz-range-track {
    height: 6px; background: var(--slider-track); border-radius: 999px;
  }
  input[type="range"]::-moz-range-progress {
    height: 6px; background: var(--accent-soft); border-radius: 999px;
  }
  input[type="range"]::-moz-range-thumb {
    height: 16px; width: 16px; border-radius: 50%;
    background: var(--accent-soft); border: 2px solid var(--panel);
  }
}

/* 결과 박스 */
.composition-result {
  background-color: #15181C;
  padding: 15px 18px; margin-bottom: 20px;
  border: 1px solid var(--panel-deep); border-radius: 10px;
}
.composition-result h4 { color: var(--text-main); margin: 0 0 10px; font-size: 1rem; font-weight: 700; }

/* 버튼 / 링크 */
.composition-controls { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.midi-links { display: flex; flex-direction: row; gap: 0.5rem; flex-grow: 1; }

.btn, .midi-download-link {
  background: var(--panel-light);
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 8px 14px; border-radius: 8px; cursor: pointer;
  font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px;
  text-decoration: none; text-align: center;
  transition: background-color .3s, color .3s, transform .2s, box-shadow .3s;
  white-space: nowrap;
}
.btn:hover, .midi-download-link:hover {
  background-color: var(--accent);
  color: #2B1E00;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(212,175,55,0.35);
}

.play-btn { min-width: 85px; }
.play-btn.playing { background: var(--danger); border-color: var(--danger); color: #fff; }
.play-btn.playing:hover { background: #E4482A; }

/* 스크롤바 (WebKit) */
.scrollable-links::-webkit-scrollbar { width: 10px; }
.scrollable-links::-webkit-scrollbar-track { background: transparent; }
.scrollable-links::-webkit-scrollbar-thumb { background: #2A2E35; border-radius: 5px; }
.scrollable-links::-webkit-scrollbar-thumb:hover { background: var(--accent-soft); }

/* === Chord Progression Visual === */
.chord-visual {
  display: flex; width: 100%; border: 1px solid #282C33; border-radius: 6px;
  /* 툴팁이 컨테이너 밖으로 자연스레 보이도록 */
  overflow: visible;
  background: #111318;
}
.chord-bar { position: relative; flex: 1 1 0; min-width: 0; height: 56px; border-right: 1px solid #232730; }
.chord-bar:last-child { border-right: none; }
.chord-fill {
  position: absolute; left: 0; top: 0; height: 100%; width: 0%;
  background: rgba(212,175,55,0.26); transition: width 0.05s linear;
}
.chord-label {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%);
  font-weight: 600; font-size: 0.85rem; text-align: center; color: var(--text-main);
  white-space: nowrap; pointer-events: none; padding: 0 8px;
  max-width: 100%; overflow: hidden; text-overflow: ellipsis;
}



/* === Chord tooltip === */
.chord-bar { position: relative; }

.chord-bar::after {
  content: attr(data-chord);
  position: absolute;
  left: 50%;
  bottom: 100%;
  transform: translate(-50%, -8px);
  background: #0F1217;
  color: var(--text-main);
  border: 1px solid #2A2E35;
  padding: 6px 8px;
  font-size: 0.8rem;
  line-height: 1.2;
  white-space: nowrap;        /* 너무 길면 한 줄 유지 */
  border-radius: 6px;
  box-shadow: 0 8px 18px rgba(0,0,0,0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s ease, transform .15s ease;
  z-index: 1000;
}

.chord-bar::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 100%;
  transform: translate(-50%, 2px);
  border: 6px solid transparent;
  border-top-color: #2A2E35;  /* 작은 삼각형 보더(외곽) */
  opacity: 0;
  transition: opacity .15s ease;
  z-index: 999;
}

.chord-bar:hover::after,
.chord-bar:focus::after {
  opacity: 1;
  transform: translate(-50%, -12px);
}
.chord-bar:hover::before,
.chord-bar:focus::before {
  opacity: 1;
}

/* 키보드 접근성 강조 */
.chord-bar:focus {
  outline: 2px solid rgba(212,175,55,0.45);
  outline-offset: 2px;
}



/* === 새 결과 하이라이트 이펙트 === */
.composition-result.just-created {
  position: relative;
  border-color: var(--accent);
  animation: newCardPulse 1400ms ease-out both;
  overflow: hidden;  /* 쉬머가 넘칠 때 깔끔하게 */
}

/* 골드 쉬머 라인 */
.composition-result.just-created::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    transparent 0%,
    rgba(255,255,255,0.08) 22%,
    rgba(212,175,55,0.18) 38%,
    rgba(255,255,255,0.08) 52%,
    transparent 65%
  );
  transform: translateX(-120%);
  animation: shimmerSweep 900ms ease-out 120ms forwards;
  pointer-events: none;
}

/* 글로우 펄스 */
@keyframes newCardPulse {
  0% {
    box-shadow: 0 0 0 rgba(212,175,55,0);
  }
  25% {
    box-shadow: 0 0 22px rgba(212,175,55,0.42);
  }
  55% {
    box-shadow: 0 0 14px rgba(212,175,55,0.26);
  }
  100% {
    box-shadow: 0 0 0 rgba(212,175,55,0);
  }
}

@keyframes shimmerSweep {
  0%   { transform: translateX(-120%); opacity: 1; }
  100% { transform: translateX(120%);  opacity: 0; }
}

/* 접근성: 모션 최소화 설정 시 애니메이션 제거 */
@media (prefers-reduced-motion: reduce) {
  .composition-result.just-created,
  .composition-result.just-created::after {
    animation: none !important;
  }
}

/* === 다운로드 버튼 영역 === */
.download-app-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    text-align: right;
    z-index: 1000;
}

.coming-soon-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: block;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-download {
    background-color: var(--panel-light);
    border: 1px solid var(--panel-deep);
    color: var(--text-muted);
    padding: 8px 12px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-download .fa-brands {
    font-size: 1.2rem;
}

/* Like Button Styles */
.like-btn {
    color: var(--text-muted);
    border-color: var(--panel-deep);
    background-color: var(--panel-light);
}

.like-btn:hover {
    color: var(--text-main);
    background-color: #20242A;
    border-color: var(--text-muted);
}

.like-btn.liked {
    color: #e4482a; /* A nice red color */
    border-color: #e4482a;
}

.like-btn.liked:hover {
    background-color: rgba(228, 72, 42, 0.1);
}