:root {
    --bg-color: #181818;
    --text-color: #fff;
    --brand-bg: #4CAF50;
    --brand-color: #fff;
    --brand-border: #000;
    --tile-bg: #fff;
    --tile-color: #000;
    --tile-correct: #4CAF50;
    --tile-wrong: #ef233c;
    --progress-bg: #fff;
    --progress-bar: #4CAF50;
    --border-color: #000;
    --leaderboard-gold-start: #FFD700;
    --leaderboard-gold-mid: #FFC700;
    --leaderboard-gold-end: #B8860B;
    --leaderboard-silver-start: #C0C0C0;
    --leaderboard-silver-mid: #D9D9D9;
    --leaderboard-silver-end: #A9A9A9;
    --leaderboard-bronze-start: #CD7F32;
    --leaderboard-bronze-mid: #D2691E;
    --leaderboard-bronze-end: #8B4513;
}

* {
    user-select: none;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    margin: 0;
    background: var(--bg-color);
    color: var(--text-color);
    font-family: "Press Start 2P", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

.page-wrap {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.game-container {
    width: 100%;
    max-width: 520px;
    height: 100%;
    padding: 16px;
}

.game-grid {
    display: grid;
    grid-template-rows: 1fr auto 1fr;
    height: calc(100% - 80px);
}

/* === TOPBAR === */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding: 6px 10px;
    border: 3px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 4px 4px 0 var(--border-color);
    background: var(--brand-bg);
}

.brand {
    font-weight: 900;
    font-size: 1.2rem;
    text-transform: uppercase;
    padding: 6px 10px;
}

.menu {
    display: flex;
    gap: 6px;
    align-items: center;
}

.menu span {
    font-weight: bold;
    padding: 4px 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* === LEADERBOARD === */
#leaderboard {
    width: 40px;
    height: 40px;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

#leaderboardColor[gold] {
    background: radial-gradient(ellipse farthest-corner at left top,
        var(--leaderboard-gold-start) 0%, 
        var(--leaderboard-gold-mid) 40%, 
        var(--leaderboard-gold-end) 100%);
}

#leaderboardColor[silver] {
    background: radial-gradient(ellipse farthest-corner at left top,
        var(--leaderboard-silver-start) 0%, 
        var(--leaderboard-silver-mid) 40%, 
        var(--leaderboard-silver-end) 100%);
    color: var(--border-color);
}

#leaderboardColor[bronze] {
    background: radial-gradient(ellipse farthest-corner at left top,
        var(--leaderboard-bronze-start) 0%, 
        var(--leaderboard-bronze-mid) 50%, 
        var(--leaderboard-bronze-end) 100%);
}

/* === MODAL === */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-color);
    color: var(--text-color);
    padding: 20px;
    border: 4px solid var(--border-color);
    border-radius: 0;
    width: 90%;
    max-width: 420px;
    box-shadow: 6px 6px 0 var(--border-color);
    border-radius: 10px;
}

.close-btn {
    float: right;
    font-size: 1.5rem;
    cursor: pointer;
}

/* === TILES === */
.tiles {
    height: 100%;
    max-height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: clamp(0.5vh, 1.5vw, 1.5vh);
    flex-grow: 1;
}

.tiles .row {
    display: flex;
    justify-content: center;
    gap: clamp(4px, 1.2vw, 12px);
}

.tile {
    width: min(18vw, 70px);
    height: min(18vw, 70px);
    max-width: 70px;
    max-height: 70px;
    font-size: 1.4rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: "Courier New", monospace;
    border: 3px solid var(--border-color);
    background-color: var(--tile-bg);
    border-radius: 10px;
    color: var(--tile-color);
    box-shadow: 4px 4px 0 var(--border-color);
    transition: transform 0.1s;
}

.tile:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--border-color);
}

.tile.correct-all {
    background: var(--tile-correct);
    color: var(--tile-bg);
}

.tile.wrong {
    background: var(--tile-wrong);
    color: var(--tile-bg);
}

/* === PROGRESS BAR === */
.progress-wrap {
    margin: 1vh 0 2vh;
}

.progress {
    width: 100%;
    height: 18px;
    border: 3px solid var(--border-color);
    border-radius: 10px;
    background: var(--progress-bg);
    box-shadow: 3px 3px 0 var(--border-color);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--progress-bar);
    transition: width 0.25s ease;
}

/* === NUMPAD === */
.numpad {
    height: 100%;
    max-height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: clamp(0.5vh, 1.5vw, 1.5vh);
    flex-grow: 1;
}

.numpad .row {
    display: flex;
    justify-content: center;
    gap: clamp(4px, 1.2vw, 12px);
}

.numpad .btn {
    width: min(18vw, 70px);
    height: min(18vw, 70px);
    font-size: 1.4rem;
    font-weight: 900;
    border: 3px solid var(--border-color);
    border-radius: 10px;
    background: transparent;
    color: var(--tile-color);
    background-color: var(--tile-bg);
    box-shadow: 3px 3px 0 var(--border-color);
    cursor: pointer;
    font-family: "Courier New", monospace;
    transition: transform 0.1s;
}

.numpad .btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 var(--border-color);
}