:root {
  --bg: #111319;
  --panel: #1a1f29;
  --text: #e9eef7;
  --muted: #9fa8bb;
  --accent: #39c07f;
  --danger: #ff6b6b;
  --border: #2c3444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: radial-gradient(circle at 20% 0%, #1f2735 0%, #111319 48%, #0b0d12 100%);
  color: var(--text);
}

.app {
  width: min(1200px, 96vw);
  margin: 1rem auto 2rem;
}

.topbar {
  margin-bottom: 0.8rem;
}

.topbar h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
}

.topbar p {
  margin: 0;
  color: var(--muted);
}

.controls {
  display: grid;
  gap: 0.75rem;
  background: #171d27;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem;
}

.default-melodies {
  display: grid;
  gap: 0.55rem;
  padding: 0.62rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  background: #111722;
}

.default-melodies-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.45rem;
}

.default-melodies-head small {
  color: #91a0bc;
  font-size: 0.78rem;
}

.default-melodies-title {
  color: #d9e4f7;
  font-size: 0.95rem;
  font-weight: 600;
}

.default-melody-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.5rem;
}

.default-melody-btn {
  min-width: 0;
  text-align: left;
  padding: 0.58rem 0.68rem;
  border-radius: 9px;
  background: #1f2738;
  border-color: #334159;
}

.default-melody-btn:hover:enabled {
  background: #2a344a;
}

.default-melody-btn.is-active {
  background: #2b4b6b;
  border-color: #69b0ff;
  box-shadow: inset 0 0 0 1px rgba(159, 210, 255, 0.45);
}

.default-melody-list.is-loading .default-melody-btn {
  opacity: 0.72;
  pointer-events: none;
}

.file-field,
.offset-field,
.seekbar-field {
  display: grid;
  gap: 0.35rem;
}

.file-field span,
.offset-field span,
.seekbar-field span,
.inline-field span {
  color: var(--muted);
  font-size: 0.92rem;
}

input[type="file"],
input[type="number"],
input[type="text"],
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #0f131b;
  color: var(--text);
  padding: 0.52rem 0.55rem;
}

.transport {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.playback-tools {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 0.7rem;
}

.inline-field {
  display: grid;
  gap: 0.35rem;
}

.seek-input-wrap {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

#seekBtn {
  min-width: 74px;
}

input[type="range"] {
  width: 100%;
}

button {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #202635;
  color: var(--text);
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  min-width: 108px;
}

button:hover:enabled {
  background: #2a3244;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  margin-top: 0.9rem;
  display: grid;
  gap: 0.25rem;
  color: var(--muted);
}

#statusText.error {
  color: var(--danger);
}

#statusText.ok {
  color: var(--accent);
}

.donation-card {
  margin-top: 0.9rem;
  padding: 0.85rem 0.95rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: linear-gradient(140deg, rgba(36, 52, 78, 0.9) 0%, rgba(22, 37, 57, 0.94) 100%);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.26);
}

.donation-message {
  margin: 0;
  font-size: 0.94rem;
  color: #ebf3ff;
  line-height: 1.35;
}

.donation-row {
  margin-top: 0.65rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.donation-pill {
  display: grid;
  gap: 0.1rem;
  border-radius: 10px;
  background: rgba(11, 16, 26, 0.62);
  border: 1px solid rgba(158, 198, 255, 0.32);
  padding: 0.45rem 0.62rem;
}

.donation-label {
  font-size: 0.76rem;
  color: #b8c7e4;
  letter-spacing: 0.03em;
}

#donationAliasText {
  font-size: 1rem;
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.donation-copy-btn {
  min-width: 136px;
  background: #2b4b6b;
  border-color: #7ec3ff;
}

.donation-copy-btn:hover:enabled {
  background: #355f87;
}

.desktop-downloads {
  margin-top: 0.9rem;
  padding: 0.85rem 0.95rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: linear-gradient(140deg, rgba(34, 41, 51, 0.92) 0%, rgba(19, 25, 35, 0.92) 100%);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
}

.desktop-download-title {
  margin: 0;
  color: #ebf3ff;
  font-size: 1rem;
  font-weight: 700;
}

.desktop-download-text {
  margin: 0.38rem 0 0;
  color: #bdc9dc;
  font-size: 0.9rem;
}

.desktop-download-actions {
  margin-top: 0.62rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.desktop-download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 190px;
  padding: 0.6rem 0.85rem;
  border-radius: 9px;
  border: 1px solid #3d4f68;
  text-decoration: none;
  color: #ecf4ff;
  background: #253247;
  font-weight: 600;
}

.desktop-download-btn:hover {
  background: #324764;
}

.desktop-download-btn.is-recommended {
  border-color: #8ed0ff;
  box-shadow: inset 0 0 0 1px rgba(167, 222, 255, 0.65);
}

.desktop-download-btn.windows {
  background: #214057;
}

.desktop-download-btn.mac {
  background: #2c3652;
}

.desktop-download-hint {
  margin-top: 0.56rem;
  display: block;
  color: #96a9c6;
  font-size: 0.8rem;
}

.stage-wrap {
  margin-top: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(180deg, #171b24 0%, #10131a 80%);
  position: relative;
}

#rollCanvas {
  width: 100%;
  height: min(72vh, 680px);
  display: block;
}

.fs-panel {
  position: absolute;
  left: 50%;
  bottom: max(10px, calc(env(safe-area-inset-bottom) + 8px));
  z-index: 8;
  width: min(980px, calc(100vw - 18px));
  transform: translateX(-50%) scale(var(--fs-panel-scale, 1));
  transform-origin: bottom center;
  display: none;
  pointer-events: auto;
}

.fs-panel-main {
  display: grid;
  gap: 0.55rem;
  background: linear-gradient(180deg, rgba(19, 24, 35, 0.93) 0%, rgba(11, 15, 23, 0.93) 100%);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 16px;
  padding: 0.72rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.45);
}

.fs-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.fs-time-text {
  font-size: 0.97rem;
  color: #ebf2ff;
  letter-spacing: 0.02em;
  font-weight: 600;
}

#fsExitBtn {
  min-width: 74px;
  padding: 0.44rem 0.65rem;
  background: #2c3344;
}

.fs-progress-wrap {
  display: grid;
  gap: 0.28rem;
}

.fs-progress-wrap span {
  font-size: 0.79rem;
  color: #d1dae8;
}

#fsSeekBar {
  width: 100%;
  height: 10px;
  accent-color: #39c07f;
}

.fs-bottom-row {
  display: grid;
  grid-template-columns: minmax(220px, 1.2fr) minmax(150px, 0.7fr) minmax(190px, 1fr);
  gap: 0.55rem;
  align-items: end;
}

.fs-transport {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
}

.fs-transport button,
.fs-panel-actions button,
.fs-show-btn {
  min-width: 0;
  padding: 0.56rem 0.7rem;
  font-size: 0.95rem;
}

.fs-speed-label {
  display: grid;
  gap: 0.26rem;
}

.fs-speed-label span {
  font-size: 0.82rem;
  color: #d4dff0;
}

.fs-panel-actions {
  display: grid;
  grid-template-columns: 68px 68px minmax(86px, 1fr);
  gap: 0.45rem;
}

.fs-panel.is-hidden {
  display: none !important;
}

.fs-show-btn {
  position: absolute;
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, calc(env(safe-area-inset-bottom) + 8px));
  z-index: 9;
  display: none;
  background: rgba(14, 18, 27, 0.93);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 11px;
}

.fs-show-btn.is-visible {
  display: block;
}

body.fullscreen-active {
  overflow: hidden;
}

body.fullscreen-active .app {
  width: 100vw;
  margin: 0;
}

body.fullscreen-active .topbar,
body.fullscreen-active .controls,
body.fullscreen-active .status,
body.fullscreen-active .donation-card,
body.fullscreen-active .desktop-downloads,
body.fullscreen-active .help {
  display: none;
}

body.fullscreen-active .stage-wrap {
  position: fixed;
  inset: 0;
  margin: 0;
  width: 100vw;
  height: 100dvh;
  border: 0;
  border-radius: 0;
  z-index: 40;
}

body.fullscreen-active #rollCanvas {
  height: 100dvh;
}

.stage-wrap:fullscreen,
.stage-wrap:-webkit-full-screen {
  border: 0;
  border-radius: 0;
  width: 100vw;
  height: 100dvh;
}

.stage-wrap:fullscreen #rollCanvas,
.stage-wrap:-webkit-full-screen #rollCanvas {
  height: 100dvh;
}

body.fullscreen-active .fs-panel,
.stage-wrap:fullscreen .fs-panel,
.stage-wrap:-webkit-full-screen .fs-panel {
  display: block;
}

body.fullscreen-active .fs-show-btn.is-visible,
.stage-wrap:fullscreen .fs-show-btn.is-visible,
.stage-wrap:-webkit-full-screen .fs-show-btn.is-visible {
  display: block;
}

.help {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 780px) {
  .app {
    width: 98vw;
    margin-top: 0.6rem;
  }

  .playback-tools {
    grid-template-columns: 1fr;
  }

  .donation-row {
    flex-direction: column;
    align-items: stretch;
  }

  .donation-copy-btn {
    width: 100%;
  }

  .desktop-download-actions {
    flex-direction: column;
  }

  .desktop-download-btn {
    width: 100%;
  }

  #rollCanvas {
    height: min(64vh, 520px);
  }

  .fs-transport button,
  .fs-panel-actions button,
  .fs-show-btn {
    font-size: 1.05rem;
    padding: 0.68rem 0.78rem;
  }

  .fs-panel {
    width: min(96vw, 720px);
    bottom: max(8px, calc(env(safe-area-inset-bottom) + 8px));
  }

  .fs-bottom-row {
    grid-template-columns: 1fr;
  }

  .fs-panel-main {
    max-width: 100%;
    gap: 0.62rem;
  }

  .fs-top-row {
    gap: 0.45rem;
  }

  .fs-time-text {
    font-size: 0.95rem;
  }

  .fs-panel-actions {
    grid-template-columns: 72px 72px 1fr;
  }
}