* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: Arial, Helvetica, sans-serif;
    background: #87ceeb;
}

body {
    touch-action: none;
}

#game {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}


/* =========================
   HUD
========================= */

.hud {
    position: absolute;

    top: 18px;
    left: 50%;

    transform: translateX(-50%);

    width: min(600px, 94%);

    display: flex;
    justify-content: center;

    gap: 12px;

    z-index: 10;

    pointer-events: none;
}

.hud-box {
    min-width: 120px;

    padding: 9px 18px;

    text-align: center;

    border-radius: 14px;

    background: rgba(255,255,255,0.9);

    box-shadow:
        0 6px 20px rgba(0,0,0,0.15);
}

.hud-box span {
    display: block;

    color: #66727d;

    font-size: 10px;

    font-weight: bold;

    letter-spacing: 1px;
}

.hud-box strong {
    display: block;

    margin-top: 3px;

    color: #18232d;

    font-size: 21px;
}


/* =========================
   SCREENS
========================= */

.screen {
    position: absolute;

    inset: 0;

    z-index: 20;

    display: flex;

    align-items: center;
    justify-content: center;

    background: rgba(10,30,45,0.35);

    backdrop-filter: blur(5px);
}

.hidden {
    display: none !important;
}


/* =========================
   PANEL
========================= */

.panel {
    width: min(420px, 90%);

    padding: 35px 25px;

    text-align: center;

    border-radius: 25px;

    background: rgba(255,255,255,0.96);

    box-shadow:
        0 25px 70px rgba(0,0,0,0.25);
}

.emoji {
    font-size: 65px;

    margin-bottom: 8px;
}

.panel h1 {
    color: #172b38;

    font-size: 40px;

    margin-bottom: 10px;
}

.panel h2 {
    color: #172b38;

    font-size: 34px;

    margin-bottom: 8px;
}

.panel p {
    color: #667783;

    font-size: 16px;

    margin-bottom: 18px;
}


/* =========================
   CONTROLS INFO
========================= */

.controls-info {
    display: grid;

    grid-template-columns: 1fr 1fr;

    gap: 8px;

    margin: 20px 0;
}

.controls-info div {
    padding: 11px;

    border-radius: 10px;

    background: #eef8fc;

    color: #405866;

    font-size: 13px;
}

.controls-info div:last-child {
    grid-column: span 2;
}


/* =========================
   BUTTONS
========================= */

button {
    border: 0;

    font-family: inherit;

    cursor: pointer;
}

#startBtn,
#restartBtn {
    width: 100%;

    padding: 15px 20px;

    border-radius: 14px;

    background: #ff4d6d;

    color: white;

    font-size: 17px;

    font-weight: 800;

    box-shadow: 0 6px 0 #c92d4b;

    transition: 0.15s;
}

#startBtn:hover,
#restartBtn:hover {
    transform: translateY(-2px);
}

#startBtn:active,
#restartBtn:active {
    transform: translateY(3px);

    box-shadow: 0 3px 0 #c92d4b;
}


/* =========================
   FINAL SCORE
========================= */

#finalScore {
    display: block;

    color: #ff4d6d;

    font-size: 50px;

    margin: 5px 0 15px;
}


/* =========================
   MOBILE JUMP
========================= */

.jump-btn {
    position: absolute;

    right: 25px;
    bottom: 25px;

    z-index: 15;

    width: 72px;
    height: 72px;

    border-radius: 50%;

    background: rgba(255,255,255,0.85);

    color: #172b38;

    font-size: 30px;

    box-shadow:
        0 6px 20px rgba(0,0,0,0.2);

    display: none;
}

.jump-btn:active {
    transform: scale(0.9);
}


/* =========================
   MOBILE
========================= */

@media (max-width: 700px) {

    .hud {
        top: 10px;

        width: 96%;

        gap: 6px;
    }

    .hud-box {
        min-width: 0;

        flex: 1;

        padding: 8px 5px;
    }

    .hud-box span {
        font-size: 9px;
    }

    .hud-box strong {
        font-size: 17px;
    }

    .panel {
        padding: 28px 20px;
    }

    .panel h1 {
        font-size: 32px;
    }

    .panel h2 {
        font-size: 28px;
    }

    .emoji {
        font-size: 52px;
    }

    .jump-btn {
        display: block;
    }
}


@media (max-width: 420px) {

    .hud-box strong {
        font-size: 15px;
    }

    .jump-btn {
        width: 62px;
        height: 62px;

        right: 18px;
        bottom: 18px;
    }
}