:root {
    --ui-bg: #0b1118;
    --ui-panel: rgba(13, 21, 31, 0.92);
    --ui-panel-soft: rgba(17, 24, 39, 0.78);
    --ui-border: rgba(148, 163, 184, 0.42);
    --ui-border-strong: rgba(255, 255, 255, 0.76);
    --ui-muted: #a7b0bf;
    --ui-yellow: #f4cc3a;
    --ui-green: #32d17d;
    --ui-cyan: #41dbea;
    --ui-radius: 10px;
    --ui-shadow: 0 10px 32px rgba(0, 0, 0, 0.34);
}

body {
    background:
        radial-gradient(circle at 50% 12%, rgba(65, 219, 234, 0.08), transparent 34%),
        linear-gradient(180deg, #151b23 0%, #090d12 100%);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

#game-container {
    border-color: rgba(255, 255, 255, 0.84);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 18px 56px rgba(0, 0, 0, 0.52);
}

.screen {
    background:
        radial-gradient(circle at 50% 35%, rgba(31, 41, 55, 0.46), transparent 48%),
        rgba(5, 8, 12, 0.92);
}

#start-screen {
    padding: 72px 28px 50px;
}

#start-screen h1 {
    margin-bottom: 18px;
    line-height: 1.2;
}

#start-screen > p {
    max-width: 650px;
    color: rgba(255, 255, 255, 0.82);
}

.start-actions {
    flex-wrap: wrap;
    margin-top: 8px;
}

.start-actions button,
.onboarding-panel button,
.leaderboard-panel button,
.custom-challenge-panel button,
#settlement-screen > button,
.action-buttons button {
    min-height: 44px;
    margin-top: 20px;
    padding: 12px 22px;
    border-width: 3px;
    border-radius: 8px;
    box-shadow: 0 4px 0 rgba(0, 0, 0, 0.36), 0 0 0 1px rgba(255, 255, 255, 0.18);
    transition: transform 120ms ease, box-shadow 120ms ease, filter 120ms ease;
}

.start-actions button:hover,
.onboarding-panel button:hover,
.leaderboard-panel button:hover,
.custom-challenge-panel button:hover,
#settlement-screen > button:hover,
.action-buttons button:hover {
    filter: brightness(1.08);
}

.start-actions button:active,
.onboarding-panel button:active,
.leaderboard-panel button:active,
.custom-challenge-panel button:active,
#settlement-screen > button:active,
.action-buttons button:active {
    transform: translateY(3px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.28);
}

.stats-box,
.controls-hint,
.local-records-summary,
.daily-run-summary {
    border-color: var(--ui-border);
    border-radius: var(--ui-radius);
    background: var(--ui-panel-soft);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(8px);
}

.stats-box {
    min-width: 192px;
    padding: 12px 14px;
}

.stats-box span {
    font-variant-numeric: tabular-nums;
}

.controls-hint {
    padding: 12px 14px;
}

.key {
    border-radius: 6px;
    box-shadow: 0 2px 0 rgba(255, 255, 255, 0.22);
}

#speed-btn {
    border-color: rgba(255, 255, 255, 0.7) !important;
    border-radius: 6px !important;
    background: rgba(15, 23, 42, 0.94) !important;
}

.onboarding-panel,
.leaderboard-panel,
.custom-challenge-panel {
    border-width: 3px;
    border-radius: 14px;
    background: var(--ui-panel);
    box-shadow: var(--ui-shadow), 0 0 0 1px rgba(244, 204, 58, 0.14);
}

.onboarding-panel {
    padding: 28px;
}

.onboarding-rules {
    gap: 14px;
}

.onboarding-rule {
    border-color: rgba(100, 116, 139, 0.46);
    border-radius: 9px;
    background: rgba(17, 24, 39, 0.82);
}

.onboarding-rule strong {
    display: inline-flex;
    width: 28px;
    height: 28px;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(65, 219, 234, 0.5);
    border-radius: 7px;
    background: rgba(65, 219, 234, 0.08);
}

.leaderboard-panel {
    scrollbar-color: rgba(244, 204, 58, 0.58) rgba(17, 24, 39, 0.5);
}

.leaderboard-row {
    border-bottom-color: rgba(148, 163, 184, 0.18);
}

.leaderboard-row:hover {
    background: rgba(255, 255, 255, 0.035);
}

.local-records-summary,
.daily-run-summary {
    padding: 9px 13px;
}

.profit-card {
    border-width: 5px;
    border-radius: 16px;
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.42), inset 0 0 24px rgba(255, 255, 255, 0.14);
}

.profit-card h2 {
    margin-bottom: 18px;
    border-bottom-width: 2px;
    line-height: 1.35;
}

.card-details {
    display: grid;
    gap: 10px;
}

.card-details p {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 0;
}

.highlight {
    min-width: 108px;
    border-radius: 5px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.big-return {
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
}

.status-msg {
    line-height: 1.45;
}

.local-record-result,
.daily-run-result,
.friend-challenge-result {
    border-radius: 10px;
    backdrop-filter: blur(8px);
}

#champagne-screen .action-buttons {
    align-items: stretch;
}

.support-button {
    border-radius: 8px;
}

:focus-visible {
    outline: 3px solid var(--ui-cyan);
    outline-offset: 3px;
}

@media (max-width: 768px) {
    #game-container {
        border-radius: 0;
    }

    #start-screen {
        justify-content: flex-start;
        padding: max(58px, calc(env(safe-area-inset-top) + 48px)) 18px max(42px, calc(env(safe-area-inset-bottom) + 32px));
        overflow-y: auto;
    }

    #start-screen h1 {
        margin-top: 2vh;
        margin-bottom: 12px;
        font-size: clamp(30px, 10vw, 40px);
    }

    #start-screen > p {
        font-size: 11px;
        line-height: 1.6;
    }

    .start-actions {
        width: min(320px, 92vw);
        margin-top: 4px;
    }

    .start-actions button,
    .onboarding-panel button,
    .leaderboard-panel button,
    .custom-challenge-panel button,
    #settlement-screen > button,
    .action-buttons button {
        min-height: 42px;
        padding: 10px 16px;
        border-width: 3px;
        border-radius: 8px;
    }

    .stats-box {
        min-width: 0;
        padding: 9px 10px;
        border-radius: 8px;
    }

    .onboarding-panel,
    .leaderboard-panel,
    .custom-challenge-panel {
        border-radius: 12px;
    }

    .onboarding-panel {
        padding: 20px 14px;
    }

    .onboarding-rule {
        gap: 9px;
        border-radius: 8px;
    }

    .profit-card {
        border-width: 4px;
        border-radius: 13px;
    }

    .card-details {
        gap: 8px;
    }

    .card-details p {
        gap: 8px;
    }

    .highlight {
        min-width: 96px;
        padding: 4px 6px;
    }

    .local-records-summary,
    .daily-run-summary {
        width: min(320px, 92vw);
        border-radius: 8px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .start-actions button,
    .onboarding-panel button,
    .leaderboard-panel button,
    .custom-challenge-panel button,
    #settlement-screen > button,
    .action-buttons button {
        transition: none;
    }
}