:root {
    color-scheme: dark;
    font-family: Arial, sans-serif;
    background: #10251e;
    color: #f5f7f1;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
}

* {
    box-sizing: border-box;
}

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(ellipse at 50% 0, rgba(52, 104, 76, 0.3), transparent 55%),
        #10251e;
}

button,
a {
    font: inherit;
}

.page {
    width: min(100% - 32px, 980px);
    margin: 0 auto;
    padding: 28px 0 42px;
}

.back-link {
    color: #c4d5c8;
    font-size: 14px;
    text-decoration: none;
}

.back-link:hover {
    color: #d3f36b;
}

.heading {
    padding: 30px 0 24px;
    text-align: center;
}

.eyebrow {
    margin: 0 0 8px;
    color: #a9bdad;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.18em;
}

h1 {
    margin: 0;
    font-size: clamp(38px, 8vw, 58px);
    letter-spacing: -0.05em;
}

h1 span {
    color: #d3f36b;
}

.tagline {
    margin: 10px 0 0;
    color: #bdc9bf;
}

.game-panel {
    overflow: hidden;
    border: 1px solid #40574a;
    border-radius: 18px;
    background: #182e25;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
}

.scoreboard {
    display: flex;
    min-height: 76px;
    align-items: center;
    justify-content: center;
    gap: clamp(24px, 9vw, 90px);
    padding: 10px 20px;
}

.score {
    display: flex;
    align-items: center;
    gap: 12px;
}

.score--opponent {
    flex-direction: row-reverse;
}

.score-label {
    color: #bdc9bf;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.12em;
}

.score-value {
    min-width: 34px;
    color: #d3f36b;
    font-size: 30px;
    font-weight: 700;
    text-align: center;
}

.match-label {
    color: #849589;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
}

#court {
    display: block;
    width: 100%;
    height: auto;
    background: #24644d;
    touch-action: none;
    outline: none;
}

#court:focus-visible {
    box-shadow: inset 0 0 0 3px #d3f36b;
}

.game-controls {
    display: flex;
    min-height: 78px;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 20px;
}

.game-status {
    margin: 0;
    color: #d0d9d1;
    font-size: 14px;
    line-height: 1.5;
}

.start-button {
    flex: 0 0 auto;
    border: 0;
    border-radius: 9px;
    padding: 12px 18px;
    background: #d3f36b;
    color: #17241b;
    cursor: pointer;
    font-weight: 700;
    transition: background 0.2s, transform 0.2s;
}

.start-button:hover {
    transform: translateY(-1px);
    background: #e0ff83;
}

.start-button:focus-visible,
.back-link:focus-visible {
    outline: 3px solid #d3f36b;
    outline-offset: 3px;
}

.help-text {
    margin: 18px 0 0;
    color: #a9bdad;
    font-size: 13px;
    line-height: 1.6;
    text-align: center;
}

@media (max-width: 560px) {
    .page {
        width: min(100% - 20px, 980px);
        padding-top: 20px;
    }

    .heading {
        padding: 25px 0 19px;
    }

    .game-panel {
        border-radius: 13px;
    }

    .scoreboard {
        min-height: 64px;
        gap: 18px;
        padding: 8px 12px;
    }

    .score {
        gap: 7px;
    }

    .score-label,
    .match-label {
        font-size: 10px;
    }

    .score-value {
        min-width: 26px;
        font-size: 25px;
    }

    .game-controls {
        align-items: stretch;
        flex-direction: column;
        padding: 14px;
    }

    .start-button {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}