/* =====================================================================
   SUDOKA — стили игры «Flappy Bird»
   Самодостаточный файл: подключается только на странице игры.
   ===================================================================== */

.flappy-page { max-width: 520px; margin-inline: auto; }

.flappy-head { text-align: center; margin-bottom: 1rem; }
.flappy-head h1 { font-size: clamp(1.8rem, 5vw, 2.4rem); }
.flappy-head p { color: var(--ink-muted); max-width: 46ch; margin: .35rem auto 0; }

/* ---------- Игровая сцена ---------- */
.flappy-root { display: flex; flex-direction: column; align-items: center; }

.flappy-stage {
    position: relative;
    width: min(85vw, 448px);
    aspect-ratio: 1 / 1;
    border: 3px solid var(--ink);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg);
    box-shadow: var(--shadow);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.flappy-canvas {
    display: block;
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

/* ---------- Поверхности-оверлеи (старт / game over) ---------- */
.flappy-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(58, 46, 42, .45);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s, visibility .25s;
    cursor: pointer;
    padding: 1rem;
}
.flappy-overlay.show { opacity: 1; visibility: visible; }

.flappy-overlay-inner {
    background: var(--card);
    border-radius: var(--radius);
    padding: 1.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    max-width: 88%;
}

.flappy-overlay-title {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--terracotta);
    margin-bottom: .5rem;
}
.flappy-overlay-text {
    color: var(--ink-muted);
    font-weight: 700;
}
.flappy-score-line {
    color: var(--ink);
    font-weight: 700;
    margin: .2rem 0;
    font-size: 1.05rem;
}
.flappy-restart { margin-top: 1rem; }

/* ---------- Подсказка ---------- */
.flappy-help {
    text-align: center;
    color: var(--ink-muted);
    font-size: .9rem;
    margin-top: 1rem;
    max-width: 46ch;
}
.flappy-help kbd {
    background: var(--bg-alt); border: 1px solid var(--border); border-bottom-width: 2px;
    border-radius: 5px; padding: .05rem .4rem; font-size: .8rem; font-family: var(--font);
}