:root {
  /* Telegram theme variables (set by the WebApp SDK at runtime). Fallbacks
     mirror the default dark theme. */
  --tg-bg:          var(--tg-theme-bg-color, #17212b);
  --tg-secondary:   var(--tg-theme-secondary-bg-color, #232e3c);
  --tg-section:     var(--tg-theme-section-bg-color, #1d2733);
  --tg-text:        var(--tg-theme-text-color, #f5f5f5);
  --tg-hint:        var(--tg-theme-hint-color, #7d8e98);
  --tg-link:        var(--tg-theme-link-color, #6ab3f3);
  --tg-button:      var(--tg-theme-button-color, #5288c1);
  --tg-button-text: var(--tg-theme-button-text-color, #ffffff);
  --tg-accent:      var(--tg-theme-accent-text-color, #6ab3f3);
  --tg-divider:     rgba(255,255,255,0.08);
  --radius: 14px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--tg-bg); color: var(--tg-text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
body { padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); }
main { padding: 16px; max-width: 720px; margin: 0 auto; }

/* ---------------- header ---------------- */
.hero { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 8px 0 20px; }
.day-pill { display: flex; align-items: center; gap: 4px; background: var(--tg-secondary); padding: 4px; border-radius: 999px; }
.day-btn { background: transparent; border: 0; color: var(--tg-text); font-size: 22px; width: 38px; height: 38px; border-radius: 999px; cursor: pointer; transition: background .15s; }
.day-btn:active { background: rgba(255,255,255,0.1); }
.day-display { padding: 0 16px; min-width: 80px; text-align: center; line-height: 1.05; }
.day-label { display: block; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--tg-hint); }
.day-num { font-size: 26px; font-weight: 700; }

.accent-picker { display: flex; gap: 10px; align-items: center; }
.accent-swatch { width: 26px; height: 26px; border-radius: 999px; border: 2px solid transparent; background: var(--swatch); padding: 0; cursor: pointer; box-shadow: 0 0 0 1px rgba(255,255,255,0.08) inset; transition: transform .12s, border-color .15s; }
.accent-swatch:active { transform: scale(0.92); }
.accent-swatch.selected { border-color: var(--tg-text); box-shadow: 0 0 0 1px rgba(0,0,0,0.4) inset; }

.title { margin: 6px 0 0; text-align: center; font-size: 17px; font-weight: 600; line-height: 1.3; }
.subtitle { margin: 0; color: var(--tg-hint); font-size: 13px; text-align: center; }
.frame-wrap { width: 100%; aspect-ratio: 16 / 9; background: var(--tg-secondary); border-radius: var(--radius); overflow: hidden; margin-top: 8px; }
.frame { width: 100%; height: 100%; object-fit: cover; display: block; opacity: 0; transition: opacity .25s; }
.frame.loaded { opacity: 1; }

/* ---------------- cards ---------------- */
.card { background: var(--tg-section); border-radius: var(--radius); padding: 14px 16px; margin-top: 14px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.card-head h2 { margin: 0; font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--tg-hint); }

/* ---------------- picks ---------------- */
.picks { display: flex; flex-direction: column; gap: 6px; }
.pick { display: flex; align-items: center; gap: 10px; padding: 10px; border-radius: var(--radius-sm); background: rgba(255,255,255,0.03); border: 1px solid transparent; transition: border-color .15s, background .15s; cursor: pointer; }
.pick.selected { border-color: var(--tg-accent); background: rgba(106,179,243,0.10); }
.pick-play { background: transparent; border: 0; color: var(--tg-text); width: 38px; height: 38px; border-radius: 999px; display: grid; place-items: center; cursor: pointer; flex-shrink: 0; }
.pick-play:hover { background: rgba(255,255,255,0.08); }
.pick-info { flex: 1; min-width: 0; }
.pick-track { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pick-album { font-size: 12px; color: var(--tg-hint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pick-radio { width: 18px; height: 18px; border-radius: 999px; border: 2px solid var(--tg-hint); position: relative; flex-shrink: 0; transition: border-color .15s; }
.pick.selected .pick-radio { border-color: var(--tg-accent); }
.pick.selected .pick-radio::after { content: ''; position: absolute; inset: 3px; border-radius: 999px; background: var(--tg-accent); }

.bg-section { margin-top: 14px; }
.bg-section:first-of-type { margin-top: 0; }
.bg-section-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.bg-section-title { margin: 0 0 8px; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--tg-hint); font-weight: 600; }
.bg-section-head .bg-section-title { margin-bottom: 0; }

.bg-extras { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.upload-btn, .ghost-btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border-radius: var(--radius-sm); border: 1px solid var(--tg-divider); background: rgba(255,255,255,0.04); color: var(--tg-text); cursor: pointer; font-size: 13px; }
.upload-btn:hover, .ghost-btn:hover { background: rgba(255,255,255,0.08); }
.ghost-btn[disabled] { opacity: 0.45; cursor: default; }
.upload-btn { font-weight: 500; }

.status { margin: 10px 0 0; font-size: 12px; color: var(--tg-hint); }
.status.bad { color: #e87b7b; }
.status.good { color: #6ad17a; }

/* ---------------- sliders ---------------- */
.slider-row { display: grid; grid-template-columns: 1fr; gap: 4px; padding: 6px 0; }
.slider-row label { font-size: 13px; color: var(--tg-text); display: flex; justify-content: space-between; }
.slider-row label span { color: var(--tg-hint); font-variant-numeric: tabular-nums; }
.slider-row input[type=range] { width: 100%; -webkit-appearance: none; height: 4px; background: rgba(255,255,255,0.1); border-radius: 999px; outline: none; }
.slider-row input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 16px; height: 16px; border-radius: 999px; background: var(--tg-button); cursor: pointer; border: 2px solid var(--tg-section); box-shadow: 0 0 0 1px rgba(0,0,0,0.2); }
.slider-row input[type=range]::-moz-range-thumb { width: 16px; height: 16px; border-radius: 999px; background: var(--tg-button); cursor: pointer; border: 2px solid var(--tg-section); }
.toggle { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: 13px; cursor: pointer; }

/* ---------------- preview ---------------- */
.preview-wrap { background: rgba(0,0,0,0.25); border-radius: var(--radius-sm); aspect-ratio: 16 / 9; display: grid; place-items: center; overflow: hidden; }
.preview-wrap.empty { color: var(--tg-hint); font-size: 13px; }
.preview-wrap video { width: 100%; height: 100%; display: block; }

/* ---------------- footer / overlays ---------------- */
.footer-spacer { height: 80px; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 32px); background: rgba(0,0,0,0.85); color: #fff; padding: 10px 16px; border-radius: 999px; font-size: 13px; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 30; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.55); backdrop-filter: blur(6px); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; z-index: 40; }
.overlay.hidden { display: none; }
.overlay-text { margin: 0; color: #fff; font-size: 14px; font-weight: 500; text-align: center; padding: 0 24px; }
.spinner { width: 38px; height: 38px; border-radius: 50%; border: 3px solid rgba(255,255,255,0.2); border-top-color: var(--tg-button); animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }