/* ================================================================
   Runner+ — the tunnel game.
   Loaded after site.css, which supplies the nav, .btn and the tokens.
   One screen, no scroll: the nav, then a stage filling the rest.
   ================================================================ */

:root {
    /* Both are overwritten by game.js from the active palette; these match
       the default one so nothing flashes on load. */
    --rp-bg: #07060d;
    --rp-accent: #3bffe6;
    --rp-ink: #eef1f8;
    --rp-ink-soft: #a7b2c6;
    --rp-nav-height: 65px;
}

html, body.rp-page {
    height: 100%;
    background: var(--rp-bg);
}

body.rp-page {
    display: flex;
    flex-direction: column;
    color: var(--rp-ink);
    overflow: hidden;
}

#rp-stage {
    position: relative;
    flex: 1 1 auto;
    min-height: 0;
    padding: 0;

    /* A held finger steers; it must not also pan, zoom or select. */
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

#rp-canvas {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.rp-ready #rp-canvas { opacity: 1; }

/* ---------------------- Score ---------------------- */

.rp-hud {
    position: absolute;
    top: 1rem;
    left: 1.25rem;
    right: 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    pointer-events: none;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.9);
}

.rp-stat { display: flex; flex-direction: column; }
.rp-stat:last-child { text-align: right; }

.rp-label {
    color: var(--rp-ink-soft);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.rp-value {
    font-size: clamp(1.4rem, 4vw, 2rem);
    font-weight: 500;
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}

.rp-stat:last-child .rp-value {
    color: var(--rp-ink-soft);
    font-size: clamp(1rem, 3vw, 1.25rem);
}

/* ---------------------- Milestone callout ---------------------- */

/* Sits in the upper third: the runner and the blocks worth watching are in
   the lower half, and a number over those would cost the player a run. */
.rp-toast {
    position: absolute;
    top: 16%;
    left: 0;
    right: 0;
    text-align: center;
    pointer-events: none;
    opacity: 0;
    color: var(--rp-accent);
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: clamp(2rem, 8vw, 4rem);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-shadow: 0 0 24px var(--rp-accent);
}

.rp-toast.is-showing { animation: rp-toast 1.4s ease-out both; }

@keyframes rp-toast {
    0%   { opacity: 0; transform: scale(0.8); }
    12%  { opacity: 1; transform: scale(1); }
    60%  { opacity: 1; }
    100% { opacity: 0; transform: scale(1.12); }
}

@media (prefers-reduced-motion: reduce) {
    @keyframes rp-toast {
        0%, 100% { opacity: 0; }
        12%, 60% { opacity: 1; }
    }
}

/* ---------------------- Start / game over ---------------------- */

.rp-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.9rem;
    padding: 1.5rem;
    text-align: center;
    background: radial-gradient(ellipse at center, rgba(7, 6, 13, 0.82) 0%, rgba(7, 6, 13, 0.35) 70%);
}

/* The class sets display, which would otherwise beat the hidden attribute. */
.rp-overlay[hidden] { display: none; }

.rp-overlay h1 {
    margin: 0;
    font-size: clamp(2.75rem, 10vw, 5.5rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.04em;
}

.rp-overlay p { margin: 0; max-width: 30rem; }

#rp-message { color: var(--rp-ink); font-size: 1.05rem; }

.rp-hint {
    color: var(--rp-ink-soft);
    font-size: 0.85rem;
}

.rp-hint kbd {
    display: inline-block;
    min-width: 1.6em;
    padding: 0.05em 0.4em;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 5px;
    font: 500 0.82em 'JetBrains Mono', 'Consolas', monospace;
    color: var(--rp-ink);
}

/* Shown to whichever kind of device can actually use it. */
.rp-hint-touch { display: none; }

@media (pointer: coarse) {
    .rp-hint-keys { display: none; }
    .rp-hint-touch { display: inline; }
}

#rp-start { margin-top: 0.4rem; min-width: 10rem; }

@media (prefers-reduced-motion: reduce) {
    #rp-canvas { transition: none; }
}