/* ==========================================================
   چیدمان کلی صفحات و ریسپانسیو
   ========================================================== */

#app-root {
    position: relative;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

.screen {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.screen-scroll {
    overflow-y: auto;
    align-items: stretch;
    justify-content: flex-start;
}

/* پس‌زمینه آسمانی مشترک بین صفحات معرفی/ورود */
.sky-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, var(--color-sky) 0%, var(--color-sky-deep) 55%, #3D8DBB 100%);
    z-index: var(--z-bg);
}

.hud-bar {
    position: absolute;
    top: 0; right: 0; left: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: max(10px, env(safe-area-inset-top)) 16px 10px;
    z-index: var(--z-hud);
    pointer-events: none;
}
.hud-bar > * { pointer-events: auto; }

.hud-stats { display: flex; gap: 8px; }

.container-center {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    padding: 0 20px;
}

@media (min-width: 900px) {
    .container-center { max-width: 560px; }
}

/* چیدمان افقی موبایل (حالت landscape) */
@media (max-height: 480px) and (orientation: landscape) {
    .auth-card, .menu-card { transform: scale(0.85); }
}

.safe-bottom { padding-bottom: env(safe-area-inset-bottom); }
.safe-top { padding-top: env(safe-area-inset-top); }