:root {
    --bg-color-1: #0f172a;
    --bg-color-2: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --surface-color: rgba(30, 41, 59, 0.75);
    --border-color: rgba(255, 255, 255, 0.1);
}

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

html, body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-color-1); 
    background: linear-gradient(135deg, var(--bg-color-1), var(--bg-color-2));
    color: var(--text-primary);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
}

#orientation-warning {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, var(--bg-color-1), var(--bg-color-2));
    z-index: 1000;
    color: var(--text-primary);
    align-items: center;
    justify-content: center;
    text-align: center;
}

.warning-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
}

.warning-content svg {
    animation: rotatePhone 2.5s infinite ease-in-out;
}

@keyframes rotatePhone {
    0% { transform: rotate(0deg); }
    40% { transform: rotate(-90deg); }
    60% { transform: rotate(-90deg); }
    100% { transform: rotate(0deg); }
}

#top-left {
    position: absolute;
    top: max(0.75rem, env(safe-area-inset-top, 0.75rem));
    left: max(2rem, env(safe-area-inset-left, 2rem));
    z-index: 10;
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

#help-bubble {
    display: none;
    position: absolute;
    top: calc(100% + 0.6rem);
    left: 0;
    background: var(--surface-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-radius: 0.75rem;
    padding: 0.85rem 1rem;
    font-size: 0.82rem;
    color: var(--text-primary);
    white-space: nowrap;
    z-index: 20;
    min-width: 220px;
}

#help-bubble.visible {
    display: block;
}

.help-title {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.help-section {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.help-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    color: var(--text-primary);
}

.help-key {
    color: #38bdf8;
    font-weight: 600;
}

.help-infinite {
    font-style: italic;
    color: var(--text-secondary);
}

.help-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.6rem 0;
}

.help-mobile-only { display: none; }

@media (hover: none) and (pointer: coarse) {
    .help-desktop-only { display: none; }
    .help-mobile-only  { display: flex; }
}

#help-bubble kbd {
    background: rgba(255,255,255,0.1);
    border: 1px solid var(--border-color);
    border-radius: 0.3rem;
    padding: 0.1rem 0.4rem;
    font-family: inherit;
    font-size: 0.78rem;
    color: #38bdf8;
}

#nav-bar {
    position: relative;
}

#nav-bar, #mode-bar {
    background: var(--surface-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    border-radius: 1rem;
    padding: 0.5rem;
    display: flex;
    gap: 0.4rem;
    align-items: center;
}

button {
    background: linear-gradient(135deg, #38bdf8, #0ea5e9);
    color: #0f172a;
    border: none;
    padding: 0.85rem 1.2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.4);
}

button:hover {
    background: linear-gradient(135deg, #7dd3fc, #38bdf8);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(56, 189, 248, 0.5);
}

button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px rgba(56, 189, 248, 0.4);
}

.mode-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid transparent;
    padding: 0;
    cursor: pointer;
    flex-shrink: 0;
    background: var(--bg-color-2);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.mode-btn.active {
    border-color: #4ade80;
    box-shadow: 0 0 15px rgba(74, 222, 128, 0.4);
    transform: scale(1.05);
}

.mode-btn:hover {
    transform: scale(1.1);
}

.pingpong-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #fff, #cbd5e1, #64748b);
    box-shadow: 2px 2px 5px rgba(0,0,0,0.4);
}

.basketball-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-image: url('../assets/basketball.png');
    background-size: cover;
    background-position: center;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.4);
}

#simulation-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    cursor: default;
}

#simulation-canvas:active {
    cursor: default;
}

#fullscreen-btn {
    position: absolute;
    bottom: max(1.5rem, env(safe-area-inset-bottom, 1.5rem));
    right: max(1.5rem, env(safe-area-inset-right, 1.5rem));
    z-index: 100;
    width: 54px;
    height: 54px;
    border-radius: 50%;
    padding: 12px;
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(0,0,0,0.4);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

#fullscreen-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.1);
}

#fullscreen-btn:active {
    transform: scale(0.95);
}

#fullscreen-btn svg {
    width: 100%;
    height: 100%;
    opacity: 0.8;
}

/* Score Display */
#score-area {
    position: absolute;
    top: max(0.3rem, env(safe-area-inset-top, 0.3rem));
    right: max(2rem, env(safe-area-inset-right, 2rem));
    z-index: 10;
    display: flex;
    gap: 0.6rem;
    align-items: stretch;
}

#score-display, #best-display {
    background: var(--surface-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 1.25rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    text-align: center;
    min-width: 5rem;
}

#score-display {
    padding: 0.75rem 1.1rem;
}

#best-display {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    overflow: hidden;
    padding: 0;
}

.best-content {
    padding: 0.75rem 1.1rem;
    text-align: center;
    flex: 1;
}

#all-time-pane {
    width: 1.4rem;
    background: rgba(244, 114, 182, 0.1);
    border-left: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0 1.25rem 1.25rem 0;
    flex-shrink: 0;
}

#all-time-pane span {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #f472b6;
    opacity: 0.8;
}

.score-label {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

#score-current {
    font-size: 2rem;
    font-weight: 800;
    color: #38bdf8;
    text-shadow: 0 0 8px rgba(56, 189, 248, 0.4);
    letter-spacing: -1px;
    line-height: 1.1;
}

#score-streak {
    font-size: 0.78rem;
    font-weight: 700;
    color: #fb923c;
    text-shadow: 0 0 8px rgba(251, 146, 60, 0.4);
    min-height: 1rem;
    margin-top: 0.1rem;
}

#score-bonus {
    font-size: 0.72rem;
    font-weight: 700;
    color: #fb923c;
    text-shadow: 0 0 8px rgba(251, 146, 60, 0.4);
    min-height: 0.9rem;
    opacity: 0.8;
}


#score-best {
    font-size: 2rem;
    font-weight: 800;
    color: #f472b6;
    text-shadow: 0 0 8px rgba(244, 114, 182, 0.4);
    letter-spacing: -1px;
    line-height: 1.1;
}

#score-best-streak {
    font-size: 0.78rem;
    font-weight: 700;
    color: #fb923c;
    text-shadow: 0 0 8px rgba(251, 146, 60, 0.4);
}

/* Score box flash animations */
@keyframes flash-score {
    0%   { box-shadow: 0 15px 35px rgba(0,0,0,0.5); border-color: var(--border-color); }
    40%  { box-shadow: 0 0 30px rgba(74, 222, 128, 0.7); border-color: rgba(74, 222, 128, 0.8); }
    100% { box-shadow: 0 15px 35px rgba(0,0,0,0.5); border-color: var(--border-color); }
}

@keyframes flash-bonus-up {
    0%   { box-shadow: 0 15px 35px rgba(0,0,0,0.5); border-color: var(--border-color); }
    40%  { box-shadow: 0 0 40px rgba(251, 191, 36, 0.9); border-color: rgba(251, 191, 36, 0.9); transform: scale(1.06); }
    100% { box-shadow: 0 15px 35px rgba(0,0,0,0.5); border-color: var(--border-color); transform: scale(1); }
}

@keyframes flash-bonus-lost {
    0%   { box-shadow: 0 15px 35px rgba(0,0,0,0.5); border-color: var(--border-color); }
    40%  { box-shadow: 0 0 30px rgba(251, 146, 60, 0.7); border-color: rgba(251, 146, 60, 0.8); }
    100% { box-shadow: 0 15px 35px rgba(0,0,0,0.5); border-color: var(--border-color); }
}

@keyframes flash-reset {
    0%   { box-shadow: 0 15px 35px rgba(0,0,0,0.5); border-color: var(--border-color); transform: translateX(0); }
    15%  { transform: translateX(-6px); box-shadow: 0 0 40px rgba(239, 68, 68, 0.9); border-color: rgba(239, 68, 68, 0.9); }
    30%  { transform: translateX(6px); }
    45%  { transform: translateX(-4px); }
    60%  { transform: translateX(4px); }
    75%  { transform: translateX(-2px); }
    100% { box-shadow: 0 15px 35px rgba(0,0,0,0.5); border-color: var(--border-color); transform: translateX(0); }
}

#score-area.flash-score      #score-display { animation: flash-score      0.6s ease forwards; }
#score-area.flash-bonus-up   #score-display { animation: flash-bonus-up   0.6s ease forwards; }
#score-area.flash-bonus-lost #score-display { animation: flash-bonus-lost 0.6s ease forwards; }
#score-area.flash-reset      #score-display { animation: flash-reset      0.8s ease forwards; }

/* Toast notifications */
@keyframes toast-expand-fade {
    0%   { opacity: 1;   transform: translateX(-50%) scale(1);    filter: blur(0px); }
    100% { opacity: 0;   transform: translateX(-50%) scale(2.2);  filter: blur(3px); }
}

#toast-container {
    position: absolute;
    top: 38%;
    left: 50%;
    z-index: 50;
    pointer-events: none;
}

.game-toast {
    position: absolute;
    left: 0;
    top: 0;
    transform: translateX(-50%);
    white-space: nowrap;
    font-family: 'Orbitron', sans-serif;
    font-weight: 900;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    animation: toast-expand-fade 0.95s cubic-bezier(0.2, 0, 0.8, 1) forwards;
}

.toast-score {
    font-size: 1.6rem;
    color: #4ade80;
    text-shadow: 0 0 20px rgba(74, 222, 128, 0.9);
}

.toast-bonus-score {
    font-size: 1.8rem;
    color: #fb923c;
    text-shadow: 0 0 20px rgba(251, 146, 60, 0.9);
}

.toast-bonus-up {
    font-size: 2rem;
    color: #fbbf24;
    text-shadow: 0 0 30px rgba(251, 191, 36, 1);
}

.toast-bonus-lost {
    font-size: 1.5rem;
    color: #fb923c;
    text-shadow: 0 0 20px rgba(251, 146, 60, 0.9);
}

.toast-reset {
    font-size: 2.4rem;
    color: #ef4444;
    text-shadow: 0 0 30px rgba(239, 68, 68, 1);
}

/* ── Mobile landscape HUD ── */
#menu-toggle { display: none; }

@keyframes hud-pop-in {
    from { opacity: 0; transform: scale(0.88); }
    to   { opacity: 1; transform: scale(1); }
}

@media screen and (max-width: 900px) and (orientation: landscape) {
    /* ── Left nav: show toggle, collapse bars ── */
    #menu-toggle {
        display: flex;
        width: 36px;
        height: 36px;
    }

    #top-left {
        top: max(0.5rem, env(safe-area-inset-top, 0.5rem));
        left: max(0.75rem, env(safe-area-inset-left, 0.75rem));
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
    }

    #nav-bar, #mode-bar {
        display: none;
    }

    #top-left.menu-open #nav-bar,
    #top-left.menu-open #mode-bar {
        display: flex;
        animation: hud-pop-in 0.15s ease forwards;
    }

    /* ── Right score: collapsed = number only ── */
    #score-area {
        top: max(0.5rem, env(safe-area-inset-top, 0.5rem));
        right: max(0.75rem, env(safe-area-inset-right, 0.75rem));
        gap: 0.3rem;
        flex-direction: column;
        align-items: flex-end;
        cursor: pointer;
    }

    #score-display {
        padding: 0.3rem 0.65rem;
        min-width: 0;
        border-radius: 0.9rem;
    }

    .score-label       { display: none; }
    #score-bonus       { display: none; }
    #best-display      { display: none; }

    #score-current { font-size: 1.5rem; }
    #score-streak  { font-size: 0.6rem; min-height: 0.75rem; }

    /* Expanded score */
    #score-area.score-open #best-display {
        display: flex;
        animation: hud-pop-in 0.15s ease forwards;
    }
    #score-area.score-open .score-label    { display: block; font-size: 0.55rem; }
    #score-area.score-open #score-bonus    { display: block; font-size: 0.6rem; }
    #score-area.score-open #score-display  { padding: 0.5rem 0.75rem; }
    #score-area.score-open #score-current  { font-size: 1.4rem; }
    #score-area.score-open #score-best     { font-size: 1.4rem; }
    #score-area.score-open #best-display   { padding: 0; min-width: 0; border-radius: 0.9rem; flex-direction: column; }
    #score-area.score-open .best-content   { padding: 0.5rem 0.75rem 0.3rem; }
    #score-area.score-open #score-best-streak { font-size: 0.65rem; }
    #score-area.score-open #all-time-pane  {
        width: auto; height: 1.2rem;
        border-left: none; border-top: 1px solid var(--border-color);
        border-radius: 0 0 0.9rem 0.9rem;
        flex-direction: row;
    }
    #score-area.score-open #all-time-pane span {
        writing-mode: horizontal-tb;
        transform: none;
        font-size: 0.5rem;
    }
}

/* Hide button when in fullscreen */
:fullscreen #fullscreen-btn {
    display: none !important;
}
:-webkit-full-screen #fullscreen-btn {
    display: none !important;
}

@media screen and (max-width: 900px) {
    #fullscreen-btn { display: none !important; }
}

/* Mobile Adjustments */
@media screen and (max-width: 900px) and (orientation: portrait) {
    #orientation-warning {
        display: flex;
    }
}


/* View Management */
.view-screen {
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0; left: 0;
}

/* Game Screen */
#game-screen {
    background: linear-gradient(rgba(15, 23, 42, 0.45), rgba(15, 23, 42, 0.65)), url('../assets/game_bg.jpg') center/cover no-repeat;
    transition: background 0.6s ease;
}

#game-screen.bg-pingpong {
    background: #060608;
    overflow: hidden;
    isolation: isolate;
}

#game-screen.bg-pingpong::before {
    content: '';
    position: absolute;
    top: 0;
    left: -5%;
    right: -5%;
    bottom: -15%;
    background: url('../assets/beerpong_bg.jpg') center 15%/cover no-repeat;
    z-index: 0;
}

#game-screen.bg-pingpong::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(15, 23, 42, 0.45), rgba(15, 23, 42, 0.65));
    z-index: 1;
    pointer-events: none;
}

/* Home Screen */
#home-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(rgba(15, 23, 42, 0.6), rgba(15, 23, 42, 0.8)), url('../assets/basketball_court_bg.jpg') center/cover no-repeat;
    z-index: 10;
}

.home-content {
    background: var(--surface-color);
    backdrop-filter: blur(16px);
    padding: 3rem;
    border-radius: 1.5rem;
    border: 1px solid var(--border-color);
    text-align: center;
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    max-width: 400px;
    width: 90%;
}

.logo-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #e0f2fe, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.play-btn {
    width: 100%;
    font-size: 1.25rem;
    padding: 1rem;
    margin-top: 0.75rem;
}

.secondary-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    box-shadow: none;
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    box-shadow: none;
}

.home-btn {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Leaderboard Screen */
#leaderboard-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(rgba(15, 23, 42, 0.6), rgba(15, 23, 42, 0.8)), url('../assets/basketball_court_bg.jpg') center/cover no-repeat;
    z-index: 10;
}

/* In-game leaderboard modal */
.lb-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lb-modal-card {
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 1.25rem;
    padding: 1.25rem 1.25rem 1rem;
    width: min(420px, 90vw);
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}

.lb-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.lb-modal-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 0.05em;
}

.lb-modal-tabs {
    margin: 0;
}

#lb-modal-list {
    overflow-y: auto;
    flex: 1;
}

.leaderboard-content {
    background: var(--surface-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 2rem;
    border-radius: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    width: 90%;
    max-width: 460px;
    text-align: center;
    display: flex;
    flex-direction: column;
    max-height: 90vh;
}

.leaderboard-tabs {
    display: flex;
    gap: 0.5rem;
    margin: 1.25rem 0 1rem;
    flex-shrink: 0;
}

.tab-btn {
    flex: 1;
    padding: 0.6rem 0.75rem;
    font-size: 0.9rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    box-shadow: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn.active {
    background: linear-gradient(135deg, #38bdf8, #0ea5e9);
    color: #0f172a;
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.4);
}

.tab-btn:hover:not(.active) {
    background: rgba(255,255,255,0.05);
    transform: none;
    box-shadow: none;
}

.tab-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.lb-table-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1rem 0.5rem;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.lb-col-rank {
    width: 2rem;
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-align: center;
}

.lb-col-name {
    flex: 1;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-align: left;
}

.lb-col-score {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: 5.5rem;
    text-align: right;
    white-space: nowrap;
    flex-shrink: 0;
}

.lb-col-streak {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: 5.5rem;
    text-align: right;
    white-space: nowrap;
    flex-shrink: 0;
}

.lb-sortable {
    cursor: pointer;
    user-select: none;
    transition: color 0.15s;
}

.lb-sortable:hover {
    color: var(--text-primary);
}

.lb-sortable::after {
    content: ' ▼';
    font-size: 0.6rem;
    opacity: 0;
    transition: opacity 0.15s;
}

.lb-sortable.active-sort::after {
    opacity: 1;
}

#leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    overflow-y: auto;
    flex: 1;
    min-height: 200px;
    padding-right: 0.25rem;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

#leaderboard-list::-webkit-scrollbar {
    width: 4px;
}

#leaderboard-list::-webkit-scrollbar-track {
    background: transparent;
}

#leaderboard-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.lb-loading {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 3rem 0;
    text-align: center;
}

.lb-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    text-align: left;
    transition: background 0.15s ease;
    flex-shrink: 0;
}

.lb-row:hover {
    background: rgba(255,255,255,0.06);
}

.lb-row.lb-gold {
    border-color: rgba(251, 191, 36, 0.5);
    background: rgba(251, 191, 36, 0.06);
}

.lb-row.lb-silver {
    border-color: rgba(148, 163, 184, 0.4);
    background: rgba(148, 163, 184, 0.05);
}

.lb-row.lb-bronze {
    border-color: rgba(180, 120, 60, 0.4);
    background: rgba(180, 120, 60, 0.05);
}

.lb-rank {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-secondary);
    width: 2rem;
    flex-shrink: 0;
    text-align: center;
}

.lb-row.lb-gold .lb-rank   { color: #fbbf24; }
.lb-row.lb-silver .lb-rank { color: #94a3b8; }
.lb-row.lb-bronze .lb-rank { color: #b47c3c; }

.lb-name {
    flex: 1;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lb-score {
    font-size: 1rem;
    font-weight: 800;
    color: #38bdf8;
    text-shadow: 0 0 8px rgba(56, 189, 248, 0.4);
    width: 5.5rem;
    text-align: right;
    flex-shrink: 0;
}

.lb-streak {
    font-size: 1rem;
    font-weight: 800;
    color: #f472b6;
    text-shadow: 0 0 8px rgba(244, 114, 182, 0.4);
    width: 5.5rem;
    text-align: right;
    flex-shrink: 0;
}

/* Auth Screen */
#auth-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(rgba(15, 23, 42, 0.6), rgba(15, 23, 42, 0.8)), url('../assets/basketball_court_bg.jpg') center/cover no-repeat;
    z-index: 10;
}

#auth-screen input {
    width: 100%;
    padding: 0.85rem 1rem;
    margin-bottom: 0.75rem;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    box-sizing: border-box;
}

#auth-screen input:focus {
    border-color: var(--accent-color);
    background: rgba(56, 189, 248, 0.08);
}

.auth-error {
    background: rgba(220, 38, 38, 0.15);
    border: 1px solid rgba(220, 38, 38, 0.4);
    color: #fca5a5;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    text-align: left;
}

.user-email {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    margin-top: -1rem;
    word-break: break-all;
}