.fltg-app {
    --fltg-bg: var(--tg-theme-bg-color, #182431);
    --fltg-card: var(--tg-theme-secondary-bg-color, #223142);
    --fltg-text: var(--tg-theme-text-color, #f8fafc);
    --fltg-muted: var(--tg-theme-hint-color, #9fb0c3);
    --fltg-accent: var(--tg-theme-button-color, #1689e8);
    --fltg-button-text: var(--tg-theme-button-text-color, #fff);
    box-sizing: border-box;
    width: 100%;
    min-height: 100vh;
    min-height: 100dvh;
    padding: max(18px, env(safe-area-inset-top)) 16px max(20px, env(safe-area-inset-bottom));
    background: var(--fltg-bg);
    color: var(--fltg-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.fltg-app *, .fltg-app *::before, .fltg-app *::after { box-sizing: border-box; }
.fltg-loader[hidden], .fltg-content[hidden] { display: none !important; }
.fltg-loader { min-height: 78vh; display: grid; place-content: center; justify-items: center; gap: 14px; text-align: center; }
.fltg-loader img { width: min(210px, 55vw); height: auto; filter: drop-shadow(0 12px 28px rgba(0,0,0,.28)); }
.fltg-loader-track { width: min(280px, 76vw); height: 9px; overflow: hidden; border-radius: 999px; background: rgba(148,163,184,.28); }
.fltg-loader-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--fltg-accent); transition: width .18s ease; }
.fltg-loader-percent { font-size: 1.15rem; }
.fltg-loader-label { margin: 0; color: var(--fltg-muted); }
.fltg-content { width: min(760px, 100%); margin: 0 auto; }
.fltg-title { margin: 5px 0 6px; font-size: clamp(1.45rem, 6vw, 2rem); }
.fltg-subtitle { margin: 0 0 20px; color: var(--fltg-muted); }
.fltg-list { display: grid; gap: 12px; }
.fltg-choice, .fltg-button { appearance: none; border: 0; border-radius: 14px; background: var(--fltg-card); color: var(--fltg-text); font: inherit; font-weight: 700; text-align: left; padding: 16px; cursor: pointer; box-shadow: 0 7px 20px rgba(0,0,0,.13); }
.fltg-choice:active, .fltg-button:active { transform: translateY(1px); }
.fltg-choice small { display: block; margin-top: 6px; color: var(--fltg-muted); font-weight: 500; }
.fltg-back { display: inline-flex; margin-bottom: 12px; padding: 9px 12px; box-shadow: none; }
.fltg-deck-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.fltg-deck-head h1 { margin: 0; font-size: 1.2rem; }
.fltg-counter { color: var(--fltg-muted); white-space: nowrap; }
.fltg-card-stage { position: relative; min-height: min(64vh, 600px); display: grid; place-items: center; overflow: hidden; border-radius: 18px; background: #fff; color: #111827; box-shadow: 0 16px 34px rgba(0,0,0,.26); cursor: pointer; touch-action: manipulation; }
.fltg-card-stage canvas { display: block; max-width: 100%; max-height: min(64vh, 600px); width: auto; height: auto; }
.fltg-text-card { width: 100%; padding: clamp(22px, 7vw, 48px); padding-bottom: clamp(130px, 28vw, 158px); font-size: clamp(1rem, 4.3vw, 1.3rem); line-height: 1.62; overflow-wrap: anywhere; }
.fltg-card-line { min-height: 1.62em; }
.fltg-card-line + .fltg-card-line { margin-top: .16em; }
.fltg-card-line.fltg-subitem { padding-inline-start: 1.5em; }
.fltg-card-logo { position: absolute; right: 15px; bottom: 45px; width: clamp(68px, 19vw, 92px); height: auto; opacity: .48; pointer-events: none; user-select: none; }
.fltg-card-footer { position: absolute; inset-inline: 14px; bottom: 12px; direction: ltr; color: #475569; font-size: clamp(.67rem, 2.7vw, .8rem); line-height: 1.25; text-align: left; overflow-wrap: anywhere; pointer-events: none; }
.fltg-controls { display: grid; grid-template-columns: 1fr 1.2fr 1fr; gap: 10px; margin-top: 13px; }
.fltg-controls .fltg-button { text-align: center; padding: 13px 8px; background: var(--fltg-accent); color: var(--fltg-button-text); }
.fltg-controls .fltg-button:disabled { opacity: .42; cursor: default; }
.fltg-progress { height: 6px; margin: 13px 0; border-radius: 999px; overflow: hidden; background: rgba(148,163,184,.24); }
.fltg-progress span { display: block; height: 100%; background: var(--fltg-accent); transition: width .2s ease; }
.fltg-index { display: flex; gap: 7px; overflow-x: auto; padding: 4px 0 10px; scrollbar-width: thin; }
.fltg-index button { flex: 0 0 auto; min-width: 40px; border: 1px solid rgba(148,163,184,.42); border-radius: 10px; background: transparent; color: var(--fltg-text); padding: 8px; }
.fltg-index button.is-active { border-color: var(--fltg-accent); background: var(--fltg-accent); color: var(--fltg-button-text); }
.fltg-error { padding: 18px; border-radius: 14px; color: #fecaca; background: rgba(127,29,29,.35); }
@media (max-width: 420px) {
    .fltg-app { padding-inline: 11px; }
    .fltg-card-stage { min-height: 57vh; }
    .fltg-controls { grid-template-columns: 1fr 1fr; }
    .fltg-controls .fltg-flip { grid-column: 1 / -1; grid-row: 1; }
}