/* ─── Reset & base ─────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #000000;
  --surface:     #121212;
  --surface2:    #181818;
  --surface3:    #282828;
  --border:      #282828;
  --border2:     #404040;
  --text:        #ffffff;
  --muted:       #a7a7a7;
  --green:       #1db954;
  --green-dim:   rgba(29,185,84,0.12);
  --green-glow:  rgba(29,185,84,0.28);
  --red:         #e91429;
  --red-dim:     rgba(233,20,41,0.12);
  --yellow:      #e3a900;
  --yellow-dim:  rgba(227,169,0,0.12);
  --r:           8px;
  --r-sm:        5px;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 15px;
  overflow-x: hidden;
}

.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 600px; margin: 0 auto; padding: 13px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-svg { display: block; flex-shrink: 0; }
.logo-text { font-family: 'Bebas Neue', sans-serif; font-size: 26px; letter-spacing: 3px; color: var(--text); line-height: 1; }
.header-right { display: flex; align-items: center; gap: 12px; }
.song-count { font-family: 'DM Mono', monospace; font-size: 12px; color: var(--muted); letter-spacing: 0.5px; }
.icon-btn {
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--border2); background: var(--surface3); color: var(--muted);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: border-color .2s, color .2s, background .2s;
}
.icon-btn svg { width: 14px; height: 14px; }
.icon-btn:hover { border-color: var(--green); color: var(--green); }
.icon-btn.spinning svg { animation: spin .9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.home-btn {
  display: flex; align-items: center; gap: 6px;
  text-decoration: none; color: var(--muted);
  font-family: 'DM Mono', monospace; font-size: 11px; letter-spacing: 0.08em;
  padding: 5px 12px; border: 1px solid var(--border2); border-radius: 999px;
  background: var(--surface3); transition: border-color .2s, color .2s, background .2s; flex-shrink: 0;
}
.home-btn:hover { border-color: var(--green); color: var(--green); background: var(--green-dim); }
.home-btn svg { width: 12px; height: 12px; }

.main { max-width: 600px; margin: 0 auto; padding: 28px 20px 40px; }
.screen { display: none; }
.screen.active { display: block; }
.hidden { display: none !important; }

.genre-badge {
  text-align: center; font-family: 'DM Mono', monospace; font-size: 12px;
  color: var(--green); background: var(--green-dim);
  border: 1px solid rgba(29,185,84,0.30); border-radius: 999px;
  padding: 5px 18px; margin: 0 auto 14px; display: block; width: fit-content;
  letter-spacing: 0.5px; cursor: default;
}
.genre-badge.hidden { display: none; }

.empty-state { text-align: center; padding: 80px 20px; }
.empty-state h2 { font-family: 'Bebas Neue', sans-serif; font-size: 36px; letter-spacing: 2px; margin-bottom: 12px; color: var(--muted); }
.empty-state p { color: var(--muted); font-size: 14px; line-height: 1.7; max-width: 340px; margin: 0 auto 24px; }
.warning-msg { display: inline-block; color: var(--red); font-size: 13px; padding: 10px 16px; background: var(--red-dim); border: 1px solid var(--red); border-radius: var(--r-sm); }

.steps-row {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 5px;
  margin-bottom: 20px; padding: 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
}
.step { display: flex; flex-direction: column; align-items: center; gap: 5px; }
.step-fill { width: 100%; height: 6px; border-radius: 3px; background: var(--surface3); transition: background .3s; }
.step-dur { font-family: 'DM Mono', monospace; font-size: 10px; color: var(--muted); letter-spacing: 0.3px; }

.step.active .step-fill { background: var(--green); animation: green-pulse 1.4s ease-in-out infinite; }
.step.active .step-dur  { color: var(--green); font-weight: 500; }
.step.skipped .step-fill { background: var(--red); }
.step.skipped .step-dur  { color: var(--red); }
.step.wrong .step-fill   { background: var(--red); }
.step.wrong .step-dur    { color: var(--red); }
.step.correct .step-fill { background: var(--green); }
.step.correct .step-dur  { color: var(--green); }
.step.artist .step-fill  { background: var(--yellow); }
.step.artist .step-dur   { color: var(--yellow); }
@keyframes green-pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.55; } }

.guess-history { display: flex; flex-direction: column; gap: 5px; margin-top: 16px; }
.guess-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 14px; border: 1px solid var(--border2); border-radius: var(--r-sm);
  font-size: 13px; animation: slide-in .2s ease;
}
.guess-item.wrong   { border-color: var(--red);    background: var(--red-dim); }
.guess-item.artist  { border-color: var(--yellow);  background: var(--yellow-dim); }
.guess-item.skipped { border-color: var(--border2); background: var(--surface2); }
.guess-item-icon            { font-size: 12px; }
.guess-item-title           { font-weight: 600; color: var(--text); }
.guess-item-artist          { font-size: 12px; margin-left: auto; color: var(--muted); }
.guess-item-artist.correct  { color: var(--green); font-weight: 600; }
@keyframes slide-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }

.play-zone { display: flex; flex-direction: column; align-items: center; gap: 14px; margin-bottom: 28px; }

.vu-btn {
  position: relative; width: 116px; height: 116px;
  border-radius: 50%; border: none; background: transparent;
  cursor: pointer; outline: none; transition: transform .15s;
}
.vu-btn:hover:not(:disabled)  { transform: scale(1.05); }
.vu-btn:active:not(:disabled) { transform: scale(0.97); }
.vu-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.vu-ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid var(--green); background: var(--green);
  transition: background .2s, box-shadow .2s;
  box-shadow: 0 0 20px var(--green-glow);
}
.vu-btn:not(:disabled):hover .vu-ring { background: #1ed760; border-color: #1ed760; box-shadow: 0 0 32px var(--green-glow); }
.vu-btn.playing .vu-ring { background: var(--green); border-color: var(--green); animation: vu-pulse .7s ease-in-out infinite alternate; }
@keyframes vu-pulse { from { box-shadow: 0 0 16px var(--green-glow); } to { box-shadow: 0 0 52px var(--green-glow); } }

.vu-inner { position: absolute; inset: 0; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; }
.vu-inner #play-icon { font-size: 30px; line-height: 1; color: #fff; }
.play-dur { font-family: 'DM Mono', monospace; font-size: 11px; color: rgba(255,255,255,0.75); letter-spacing: 1px; }

.play-bar-wrap { width: 240px; height: 6px; background: var(--surface3); border-radius: 3px; overflow: hidden; cursor: pointer; }
.play-bar { height: 100%; width: 0%; background: var(--green); border-radius: 3px; transition: width linear; box-shadow: 0 0 6px var(--green-glow); }
.play-status { font-size: 13px; color: var(--muted); font-style: italic; height: 18px; }

.guess-zone { display: flex; flex-direction: column; gap: 10px; }
.search-wrap { position: relative; }

.search-input {
  width: 100%; padding: 14px 18px;
  background: var(--surface2); border: 1.5px solid var(--border2); border-radius: 500px;
  color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 15px; outline: none;
  transition: border-color .2s, background .2s;
}
.search-input::placeholder { color: var(--muted); }
.search-input:focus { border-color: var(--green); background: var(--surface3); }

.search-drop {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: var(--surface3); border: 1px solid var(--border2); border-radius: var(--r);
  box-shadow: 0 16px 48px rgba(0,0,0,0.7); z-index: 50; max-height: 290px; overflow-y: auto;
}
.search-drop::-webkit-scrollbar { width: 3px; }
.search-drop::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.drop-item { padding: 11px 18px; cursor: pointer; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--border); transition: background .12s; }
.drop-item:last-child { border-bottom: none; }
.drop-item:hover, .drop-item.hi { background: var(--surface2); }
.drop-item-info { display: flex; flex-direction: column; gap: 2px; }
.drop-title  { font-size: 14px; font-weight: 600; color: var(--text); }
.drop-artist { font-size: 12px; color: var(--muted); }
.drop-title mark, .drop-artist mark { background: var(--green-dim); color: var(--green); border-radius: 2px; padding: 0 2px; }
.drop-empty { padding: 18px; text-align: center; color: var(--muted); font-size: 13px; font-style: italic; }
.drop-item.guessed { opacity: 0.5; }
.drop-guessed-badge { display: inline-block; font-size: 10px; font-weight: 600; background: var(--yellow-dim); color: var(--yellow); border: 1px solid var(--yellow); border-radius: 3px; padding: 1px 5px; margin-left: 6px; vertical-align: middle; letter-spacing: 0.3px; }

.action-row { display: grid; grid-template-columns: 1fr 2fr; gap: 8px; }
.btn-skip {
  padding: 13px; background: transparent; border: 1.5px solid var(--border2); border-radius: 500px;
  color: var(--muted); font-family: 'Bebas Neue', sans-serif; font-size: 17px; letter-spacing: 2px;
  cursor: pointer; transition: border-color .2s, color .2s;
}
.btn-skip:hover { border-color: var(--yellow); color: var(--yellow); }

.btn-guess {
  padding: 13px; background: var(--green); border: none; border-radius: 500px;
  color: #000; font-family: 'Bebas Neue', sans-serif; font-size: 17px; letter-spacing: 2px;
  cursor: pointer; font-weight: 700; transition: transform .15s, opacity .15s, box-shadow .15s;
  box-shadow: 0 0 16px var(--green-glow);
}
.btn-guess:hover:not(:disabled) { transform: scale(1.03); box-shadow: 0 0 28px var(--green-glow); }
.btn-guess:disabled { opacity: 0.25; cursor: not-allowed; box-shadow: none; }

.result-card {
  position: relative; overflow: hidden; text-align: center;
  padding: 36px 28px 32px; background: var(--surface);
  border: 1px solid var(--border2); border-radius: 12px;
  animation: fade-up .35s ease forwards;
}
.result-card.win  { border-color: var(--green); animation: fade-up .35s ease forwards, pulse-win 2.4s ease-in-out .4s infinite; }
.result-card.lose { border-color: var(--red);   animation: fade-up .35s ease forwards, pulse-lose 2.4s ease-in-out .4s infinite; }
@keyframes pulse-win  { 0%,100% { outline: 2px solid rgba(29,185,84,0.7);  outline-offset: 0px; } 50% { outline: 2px solid rgba(29,185,84,0.12); outline-offset: 7px; } }
@keyframes pulse-lose { 0%,100% { outline: 2px solid rgba(233,20,41,0.7);  outline-offset: 0px; } 50% { outline: 2px solid rgba(233,20,41,0.12); outline-offset: 7px; } }
.result-card::before { content: ''; position: absolute; inset: -40px; background-image: var(--art-bg, none); background-size: cover; background-position: center; filter: blur(8px); opacity: 0.55; z-index: 0; }
.result-card::after  { content: ''; position: absolute; inset: 0; background: rgba(0,0,0,0.45); z-index: 1; }
.result-card > * { position: relative; z-index: 2; }
@keyframes fade-up { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }

.result-art { width: 180px; height: 180px; border-radius: 6px; overflow: hidden; margin: 0 auto 20px; background: var(--surface3); flex-shrink: 0; box-shadow: 0 8px 32px rgba(0,0,0,0.5); }
.result-art img { width: 100%; height: 100%; object-fit: cover; display: block; }
.art-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-size: 64px; }

.result-headline { font-family: 'Bebas Neue', sans-serif; font-size: 32px; letter-spacing: 2px; margin-bottom: 16px; }
.result-card.win  .result-headline { color: var(--green); }
.result-card.lose .result-headline { color: var(--red); }

.result-song { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--r); padding: 14px 18px; margin-bottom: 14px; }
.result-song-title  { font-size: 18px; font-weight: 700; margin-bottom: 3px; }
.result-song-artist { font-size: 13px; color: var(--muted); }
.result-song-album  { font-size: 12px; color: var(--muted); font-style: italic; margin-top: 2px; }

.result-detail { font-size: 13px; color: var(--muted); font-style: italic; margin-bottom: 14px; }
.result-steps { display: flex; justify-content: center; gap: 5px; margin-bottom: 20px; }
.rs           { width: 34px; height: 6px; border-radius: 3px; background: var(--surface3); }
.rs.skipped   { background: var(--red); }
.rs.wrong     { background: var(--red); }
.rs.correct   { background: var(--green); }
.rs.artist    { background: var(--yellow); }

.already-guessed { font-size: 12px; font-weight: 600; color: var(--yellow); padding: 6px 18px; letter-spacing: 0.3px; }

.ca-player { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: rgba(255,255,255,0.06); border-radius: 8px; margin-bottom: 16px; width: 100%; }
.ca-btn { width: 34px; height: 34px; border-radius: 50%; background: var(--green); border: none; color: #000; cursor: pointer; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: transform .15s, background .15s; }
.ca-btn:hover { background: #1ed760; transform: scale(1.07); }
.ca-time, .ca-dur { font-family: 'DM Mono', monospace; font-size: 11px; color: var(--muted); flex-shrink: 0; min-width: 30px; }
.ca-track { flex: 1; height: 4px; background: rgba(255,255,255,0.12); border-radius: 2px; cursor: pointer; position: relative; transition: height .1s; }
.ca-track:hover { height: 6px; }
.ca-fill { position: absolute; top: 0; left: 0; bottom: 0; width: 0%; background: var(--green); border-radius: 2px; pointer-events: none; box-shadow: 0 0 6px var(--green-glow); }

.artist-hint { font-size: 12px; font-weight: 600; color: var(--green); padding: 4px 18px 0; letter-spacing: 0.2px; }

.result-btns { display: flex; flex-direction: column; gap: 8px; }
.r-btn-primary, .r-btn-secondary { background: var(--green); color: #000; border: none; border-radius: 500px; padding: 13px 24px; font-family: 'Bebas Neue', sans-serif; font-size: 18px; letter-spacing: 2px; font-weight: 700; cursor: pointer; transition: transform .15s, box-shadow .15s; box-shadow: 0 0 16px var(--green-glow); }
.r-btn-primary:hover, .r-btn-secondary:hover { transform: scale(1.02); box-shadow: 0 0 28px var(--green-glow); }

@media (max-width: 480px) {
  .main { padding: 16px 14px 32px; }
  .steps-row { padding: 12px 10px; gap: 4px; }
  .step-dur { font-size: 9px; }
  .vu-btn { width: 96px; height: 96px; }
  .vu-inner #play-icon { font-size: 26px; }
  .result-art { width: 140px; height: 140px; }
  .result-card { padding: 24px 16px; }
}

/* ─── Light mode ─────────────────────────────────────────────────────── */
[data-theme="light"] {
  --bg:          #ffffff;
  --surface:     #f5f5f5;
  --surface2:    #eeeeee;
  --surface3:    #e0e0e0;
  --border:      #d0d0d0;
  --border2:     #b0b0b0;
  --text:        #121212;
  --muted:       #555555;
  --green-dim:   rgba(29,185,84,0.10);
  --green-glow:  rgba(29,185,84,0.20);
  --red-dim:     rgba(233,20,41,0.08);
  --yellow-dim:  rgba(227,169,0,0.08);
}
[data-theme="light"] .header {
  background: rgba(255,255,255,0.92);
}
[data-theme="light"] .icon-btn {
  background: #e0e0e0;
}
[data-theme="light"] .home-btn {
  background: #e0e0e0;
}
[data-theme="light"] .search-drop {
  box-shadow: 0 16px 48px rgba(0,0,0,0.10);
}
[data-theme="light"] .result-card::after {
  background: rgba(255,255,255,0.45);
}
[data-theme="light"] .result-card {
  background: #f5f5f5;
}
[data-theme="light"] .result-song {
  background: #eeeeee;
}
[data-theme="light"] .ca-player {
  background: rgba(0,0,0,0.04);
}