:root {
    --leader-safe-top: env(safe-area-inset-top, 0px);
    --leader-safe-right: env(safe-area-inset-right, 0px);
    --leader-safe-bottom: env(safe-area-inset-bottom, 0px);
    --leader-safe-left: env(safe-area-inset-left, 0px);
    --leader-ink: #102a43;
    --leader-muted: #627d98;
    --leader-line: #dce7ef;
    --leader-blue: #2563eb;
    --leader-surface: rgba(255, 255, 255, 0.94);
}

html {
    background: #eef5fa;
}

body {
    min-height: 100vh;
    min-height: 100dvh;
    padding-bottom: var(--leader-safe-bottom);
    background:
        radial-gradient(circle at 12% 12%, rgba(59, 130, 246, 0.12), transparent 30rem),
        radial-gradient(circle at 92% 36%, rgba(14, 165, 233, 0.1), transparent 28rem),
        linear-gradient(180deg, #eff7fc 0%, #f8fbfd 45%, #eef4f8 100%);
    color: var(--leader-ink);
}

.page-header {
    position: relative;
    overflow: hidden;
    padding: calc(1rem + var(--leader-safe-top)) calc(1rem + var(--leader-safe-right)) 3.1rem calc(1rem + var(--leader-safe-left));
    background:
        radial-gradient(circle at 82% 15%, rgba(255, 255, 255, 0.18), transparent 11rem),
        linear-gradient(135deg, #173f5f 0%, #2563a7 55%, #0ea5e9 100%);
    box-shadow: 0 1rem 2.8rem rgba(23, 63, 95, 0.2);
    text-align: left;
}

.page-header::before,
.page-header::after {
    content: "";
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 50%;
    pointer-events: none;
}

.page-header::before {
    top: -5rem;
    right: -3rem;
    width: 13rem;
    height: 13rem;
}

.page-header::after {
    right: 5.5rem;
    bottom: -5rem;
    width: 9rem;
    height: 9rem;
}

.header-wrapper {
    position: relative;
    z-index: 1;
    width: min(100%, 60rem);
    max-width: 60rem;
    display: grid;
    grid-template-columns: 3rem minmax(0, 1fr);
    grid-template-areas:
        "back title"
        "back subtitle";
    column-gap: 0.8rem;
    align-items: center;
}

.back-btn {
    position: static;
    grid-area: back;
    width: 3rem;
    height: 3rem;
    display: grid;
    place-items: center;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: 0.95rem;
    background: rgba(255, 255, 255, 0.13);
    color: #fff;
    font-size: 1rem;
    transform: none;
    backdrop-filter: blur(0.6rem);
    -webkit-backdrop-filter: blur(0.6rem);
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.22);
}

.back-btn:focus-visible,
.load-more-btn:focus-visible {
    outline: 3px solid rgba(255, 255, 255, 0.62);
    outline-offset: 3px;
}

.page-header h1 {
    grid-area: title;
    margin: 0;
    font-size: clamp(1.3rem, 5vw, 2rem);
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.page-header p {
    grid-area: subtitle;
    margin: 0.18rem 0 0;
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.82rem;
}

.leaderboard-container {
    position: relative;
    z-index: 2;
    width: min(100%, 60rem);
    max-width: 60rem;
    margin: -1.8rem auto 0;
    padding: 0 calc(0.875rem + var(--leader-safe-right)) calc(2rem + var(--leader-safe-bottom)) calc(0.875rem + var(--leader-safe-left));
}

.stats-summary {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.7rem;
    margin: 0 0 1.5rem;
}

.stat-box {
    position: relative;
    min-width: 0;
    display: grid;
    grid-template-columns: 0.32rem minmax(0, 1fr);
    grid-template-rows: auto auto;
    column-gap: 0.7rem;
    padding: 1rem;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: 1.15rem;
    background: var(--leader-surface);
    box-shadow: 0 0.75rem 2rem rgba(31, 72, 101, 0.11);
    text-align: left;
    backdrop-filter: blur(0.75rem);
    -webkit-backdrop-filter: blur(0.75rem);
}

.stat-box::before {
    content: "";
    grid-row: 1 / 3;
    width: 0.32rem;
    height: 100%;
    min-height: 2.7rem;
    border-radius: 999px;
    background: linear-gradient(180deg, #2563eb, #38bdf8);
}

.stat-box:nth-child(2)::before {
    background: linear-gradient(180deg, #f59e0b, #facc15);
}

.stat-value {
    overflow: hidden;
    color: #1d4ed8;
    font-size: clamp(1.35rem, 6vw, 1.85rem);
    line-height: 1.1;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.stat-box:nth-child(2) .stat-value {
    color: #b45309;
}

.stat-label {
    margin-top: 0.2rem;
    color: var(--leader-muted);
    font-size: 0.72rem;
    line-height: 1.35;
}

.leaderboard-list-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 0.75rem;
    margin: 0 0 0.85rem;
    padding-inline: 0.15rem;
}

.leaderboard-kicker {
    display: block;
    margin-bottom: 0.2rem;
    color: var(--leader-blue);
    font-size: 0.66rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.leaderboard-list-heading h2 {
    margin: 0;
    color: var(--leader-ink);
    font-size: clamp(1.2rem, 5vw, 1.55rem);
    line-height: 1.25;
}

.score-sort {
    flex: 0 0 auto;
    display: inline-flex;
    min-height: 2.35rem;
    align-items: center;
    gap: 0.38rem;
    padding: 0.45rem 0.7rem;
    border: 1px solid #dbeafe;
    border-radius: 999px;
    background: #eff6ff;
    color: #2563eb;
    font-size: 0.7rem;
    font-weight: 700;
    white-space: nowrap;
}

.player-list {
    gap: 0.7rem;
}

.player-card {
    position: relative;
    min-width: 0;
    display: grid;
    grid-template-columns: 2.5rem 3.25rem minmax(0, 1fr) auto;
    gap: 0.7rem;
    padding: 0.8rem;
    overflow: visible;
    border: 1px solid rgba(208, 222, 232, 0.86);
    border-left: 1px solid rgba(208, 222, 232, 0.86);
    border-radius: 1.1rem;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 0.45rem 1.25rem rgba(31, 72, 101, 0.08);
    transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.player-card:hover {
    transform: translateY(-2px);
    border-color: #bfdbfe;
    box-shadow: 0 0.8rem 1.8rem rgba(31, 72, 101, 0.14);
}

.player-card.top-3 {
    border-left: 1px solid transparent;
}

.player-card.rank-1 {
    padding-block: 1rem;
    border-color: rgba(245, 158, 11, 0.34);
    background:
        radial-gradient(circle at 92% 5%, rgba(250, 204, 21, 0.2), transparent 7rem),
        linear-gradient(135deg, #fffdf4, #fff);
    box-shadow: 0 0.8rem 2rem rgba(180, 83, 9, 0.12);
}

.player-card.rank-2 {
    border-color: rgba(100, 116, 139, 0.26);
    background: linear-gradient(135deg, #f8fafc, #fff);
}

.player-card.rank-3 {
    border-color: rgba(180, 83, 9, 0.24);
    background: linear-gradient(135deg, #fff8f1, #fff);
}

.player-card.current-user {
    border: 2px solid #3b82f6;
    background:
        radial-gradient(circle at 95% 0%, rgba(59, 130, 246, 0.14), transparent 8rem),
        linear-gradient(135deg, #eff6ff, #fff);
    box-shadow: 0 0.75rem 2rem rgba(37, 99, 235, 0.15);
}

.player-card.current-user::after {
    content: "YOU";
    position: absolute;
    top: -0.5rem;
    right: 0.8rem;
    padding: 0.18rem 0.5rem;
    border-radius: 999px;
    background: #2563eb;
    color: #fff;
    font-size: 0.58rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.player-rank {
    min-width: 0;
    color: #486581;
    font-size: 1rem;
    line-height: 1;
}

.rank-1 .player-rank,
.rank-2 .player-rank,
.rank-3 .player-rank {
    font-size: 1.45rem;
}

.leaderboard-avatar-wrapper {
    width: 3.25rem;
    height: 3.25rem;
}

.rank-1 .leaderboard-avatar-wrapper {
    width: 3.55rem;
    height: 3.55rem;
}

.leaderboard-avatar-wrapper img.player-avatar {
    width: 100%;
    height: 100%;
    border: 3px solid #e7f0f6;
    box-shadow: 0 0.25rem 0.75rem rgba(31, 72, 101, 0.14);
}

.rank-1 .leaderboard-avatar-wrapper img.player-avatar {
    border-color: #facc15;
}

.rank-2 .leaderboard-avatar-wrapper img.player-avatar {
    border-color: #cbd5e1;
}

.rank-3 .leaderboard-avatar-wrapper img.player-avatar {
    border-color: #fdba74;
}

.player-info {
    min-width: 0;
}

.player-name {
    overflow: hidden;
    color: var(--leader-ink);
    font-size: 0.94rem;
    line-height: 1.35;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.player-locations {
    margin-top: 0.2rem;
    color: var(--leader-muted);
    font-size: 0.72rem;
}

.player-points {
    min-width: 3.5rem;
}

.points-value {
    color: #1d4ed8;
    font-size: 1rem;
    line-height: 1.2;
}

.rank-1 .points-value {
    color: #b45309;
}

.points-label {
    margin-top: 0.15rem;
    color: #829ab1;
    font-size: 0.65rem;
}

.loading,
.empty-state {
    min-height: 13rem;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 0.75rem;
    padding: 2.5rem 1rem;
    border: 1px solid var(--leader-line);
    border-radius: 1.2rem;
    background: rgba(255, 255, 255, 0.84);
    color: var(--leader-muted);
    box-shadow: 0 0.65rem 1.8rem rgba(31, 72, 101, 0.08);
}

.loading i,
.empty-state i {
    margin: 0;
    color: #3b82f6;
    font-size: 2rem;
}

.load-more-btn {
    min-height: 3rem;
    max-width: 19rem;
    margin: 1.25rem auto 0;
    padding: 0.75rem 1rem;
    border-radius: 0.95rem;
    background: linear-gradient(135deg, #2563eb, #0ea5e9);
    box-shadow: 0 0.65rem 1.4rem rgba(37, 99, 235, 0.23);
}

.load-more-btn:hover {
    box-shadow: 0 0.85rem 1.8rem rgba(37, 99, 235, 0.3);
}

@media (max-width: 26rem) {
    .page-header {
        padding-inline: calc(0.75rem + var(--leader-safe-left)) calc(0.75rem + var(--leader-safe-right));
    }

    .leaderboard-container {
        padding-inline: calc(0.65rem + var(--leader-safe-left)) calc(0.65rem + var(--leader-safe-right));
    }

    .player-card {
        grid-template-columns: 2rem 2.85rem minmax(0, 1fr) auto;
        gap: 0.55rem;
        padding-inline: 0.65rem;
    }

    .leaderboard-avatar-wrapper,
    .rank-1 .leaderboard-avatar-wrapper {
        width: 2.85rem;
        height: 2.85rem;
    }

    .score-sort span {
        display: none;
    }

    .score-sort {
        width: 2.35rem;
        justify-content: center;
        padding-inline: 0;
    }
}

@media (min-width: 48rem) {
    .page-header {
        padding-block: calc(1.4rem + var(--leader-safe-top)) 4rem;
    }

    .header-wrapper {
        grid-template-columns: 3.25rem minmax(0, 1fr);
    }

    .back-btn {
        width: 3.25rem;
        height: 3.25rem;
    }

    .leaderboard-container {
        margin-top: -2.25rem;
        padding-inline: calc(1.25rem + var(--leader-safe-left)) calc(1.25rem + var(--leader-safe-right));
    }

    .stats-summary {
        gap: 1rem;
    }

    .stat-box {
        padding: 1.1rem 1.25rem;
    }

    .player-card {
        grid-template-columns: 3.25rem 3.75rem minmax(0, 1fr) 6rem;
        gap: 1rem;
        padding: 1rem 1.25rem;
    }

    .leaderboard-avatar-wrapper {
        width: 3.75rem;
        height: 3.75rem;
    }

    .rank-1 .leaderboard-avatar-wrapper {
        width: 4rem;
        height: 4rem;
    }

    .player-name {
        font-size: 1rem;
    }

    .points-value {
        font-size: 1.15rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .player-card,
    .load-more-btn {
        transition: none;
    }
}