* {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none
}

html,
body {
    margin: 0;
    height: 100%;
    overflow: hidden;
    background: #87ceeb;
    font-family: 'Nunito', system-ui, Segoe UI, Roboto, sans-serif;
    touch-action: none;
    overscroll-behavior: none
}

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@700;900&display=swap');

/* Mobile-first HUD */
#hud {
    position: fixed;
    left: 8px;
    top: 8px;
    z-index: 2;
    color: #333;
    background: rgba(255, 255, 255, .92);
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 16px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    display: flex;
    gap: 6px;
    align-items: center;
}

#hud.hide {
    display: none
}

#level-display {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 12px;
    margin-right: 4px;
}

#level-display.levelup {
    animation: levelPop 0.5s ease-out;
}

@keyframes levelPop {
    0% {
        transform: scale(1)
    }

    50% {
        transform: scale(1.3)
    }

    100% {
        transform: scale(1)
    }
}

.star-slot {
    width: 24px;
    height: 24px;
    background: #e0e0e0;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all 0.3s;
}

.star-slot.filled {
    background: linear-gradient(135deg, #FFD700, #FFA000);
    animation: pop 0.4s ease-out;
}

@keyframes pop {
    0% {
        transform: scale(0)
    }

    50% {
        transform: scale(1.3)
    }

    100% {
        transform: scale(1)
    }
}

#message {
    position: fixed;
    left: 50%;
    top: 45%;
    transform: translate(-50%, -50%);
    z-index: 3;
    color: #333;
    background: white;
    padding: 20px 40px;
    border-radius: 30px;
    font-size: 26px;
    font-weight: 700;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    display: none;
}

#message.show {
    display: block;
    animation: bubble 0.3s ease-out;
}

@keyframes bubble {
    0% {
        transform: translate(-50%, -50%) scale(0)
    }

    50% {
        transform: translate(-50%, -50%) scale(1.1)
    }

    100% {
        transform: translate(-50%, -50%) scale(1)
    }
}

/* Start Screen */
#start-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, #87CEEB 0%, #5BA3D9 100%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 30px;
}

#start-screen.hide {
    display: none
}

/* Language toggle */
#lang-toggle {
    position: absolute;
    top: 15px;
    right: 15px;
    display: flex;
    gap: 8px;
}

.lang-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.2);
    font-size: 24px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: 8px;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.4);
}

.lang-btn.active {
    border-color: white;
    background: rgba(255, 255, 255, 0.5);
    transform: scale(1.1);
}

#start-screen h1 {
    font-size: 48px;
    font-weight: 900;
    color: white;
    text-shadow: 4px 4px 0 #0277BD, -2px -2px 0 #0277BD, 2px -2px 0 #0277BD, -2px 2px 0 #0277BD, 0 6px 20px rgba(0, 0, 0, 0.4);
    margin: 0;
    text-align: center;
}

#start-screen p {
    font-size: 22px;
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    margin: 0;
}

.track-choice {
    display: flex;
    gap: 25px;
    margin-top: 10px;
}

.track-option {
    width: 165px;
    height: 150px;
    background: white;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    border: 4px solid transparent;
}

.track-option:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.track-option:active {
    transform: scale(0.95);
}

.track-option.selected {
    border-color: #4CAF50;
}

.track-option .icon {
    font-size: 40px;
}

.track-option .label {
    font-size: 20px;
    font-weight: 700;
    color: #333;
}

.track-option .desc {
    font-size: 13px;
    color: #666;
}

#start-btn {
    margin-top: 15px;
    padding: 18px 50px;
    font-size: 26px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    border: none;
    border-radius: 40px;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.15s;
    font-family: inherit;
}

#start-btn:hover {
    transform: scale(1.05);
}

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

/* Pause button */
#pause-btn {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 5;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 4px solid white;
    background: rgba(0, 0, 0, 0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

#pause-btn.hide {
    display: none
}

#pause-btn .pause-icon {
    display: flex;
    gap: 5px;
}

#pause-btn .pause-icon span {
    width: 6px;
    height: 20px;
    background: white;
    border-radius: 2px;
}

/* Pause menu */
#pause-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 20;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

#pause-menu.show {
    display: flex
}

#pause-menu h2 {
    font-size: 42px;
    color: white;
    margin: 0;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.menu-btn {
    padding: 15px 40px;
    font-size: 22px;
    font-weight: 700;
    color: white;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.15s;
    font-family: inherit;
    min-width: 200px;
}

.menu-btn:hover {
    transform: scale(1.05)
}

.menu-btn:active {
    transform: scale(0.95)
}

.menu-btn.resume {
    background: linear-gradient(135deg, #4CAF50, #2E7D32)
}

.menu-btn.restart {
    background: linear-gradient(135deg, #FF9800, #E65100)
}

.menu-btn.quit {
    background: linear-gradient(135deg, #f44336, #c62828)
}

#track-buttons {
    position: fixed;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    gap: 20px;
}

#track-buttons.hide {
    display: none
}

.track-btn {
    width: 75px;
    height: 75px;
    border-radius: 50%;
    border: 5px solid white;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.1s;
}

.track-btn:active {
    transform: scale(0.88)
}

.track-btn-left {
    background: linear-gradient(135deg, #FF9800, #E65100)
}

.track-btn-center {
    background: linear-gradient(135deg, #4CAF50, #1B5E20)
}

.track-btn-right {
    background: linear-gradient(135deg, #2196F3, #0D47A1)
}

.track-btn::before {
    content: '';
    width: 26px;
    height: 26px;
    background: white;
}

.track-btn-left::before {
    clip-path: polygon(100% 0%, 100% 100%, 0% 50%)
}

.track-btn-center::before {
    clip-path: polygon(50% 0%, 100% 100%, 0% 100%)
}

.track-btn-right::before {
    clip-path: polygon(0% 0%, 0% 100%, 100% 50%)
}

.track-btn.hide {
    display: none
}

#celebration {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 10;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

#celebration.show {
    display: flex
}

#celebration h1 {
    font-size: 56px;
    color: white;
    text-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
    animation: bounce 0.5s ease-out;
}

#celebration .stars {
    font-size: 60px;
    display: flex;
    gap: 20px;
}

#celebration .stars span {
    animation: spin 1s ease-in-out infinite;
}

#celebration .stars span:nth-child(2) {
    animation-delay: 0.2s
}

#celebration .stars span:nth-child(3) {
    animation-delay: 0.4s
}

#celebration #next-level-text {
    color: white;
    font-size: 24px;
    margin-top: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

@keyframes bounce {
    0% {
        transform: scale(0)
    }

    50% {
        transform: scale(1.2)
    }

    100% {
        transform: scale(1)
    }
}

@keyframes spin {

    0%,
    100% {
        transform: rotate(-10deg) scale(1)
    }

    50% {
        transform: rotate(10deg) scale(1.2)
    }
}

/* ====== MOBILE RESPONSIVE ====== */
@media (max-width: 600px) {
    #lang-toggle {
        top: 10px;
        right: 10px;
        gap: 6px
    }

    .lang-btn {
        width: 38px;
        height: 38px;
        font-size: 20px;
        border-width: 2px
    }

    #start-screen h1 {
        font-size: 32px
    }

    #start-screen p {
        font-size: 18px
    }

    .track-choice {
        gap: 15px
    }

    .track-option {
        width: 132px;
        height: 120px
    }

    .track-option .icon {
        font-size: 32px
    }

    .track-option .label {
        font-size: 16px
    }

    .track-option .desc {
        font-size: 11px
    }

    #start-btn {
        padding: 14px 35px;
        font-size: 22px
    }

    #hud {
        padding: 6px 10px;
        gap: 4px;
        border-radius: 15px
    }

    #level-display {
        padding: 2px 6px;
        font-size: 11px
    }

    .star-slot {
        width: 20px;
        height: 20px;
        border-radius: 4px;
        font-size: 14px
    }

    #pause-btn {
        width: 44px;
        height: 44px;
        top: 10px;
        right: 10px
    }

    #pause-btn .pause-icon span {
        width: 5px;
        height: 16px
    }

    .track-btn {
        width: 70px;
        height: 70px;
        border-width: 4px
    }

    .track-btn::before {
        width: 22px;
        height: 22px
    }

    #track-buttons {
        gap: 20px;
        padding-bottom: env(safe-area-inset-bottom, 15px)
    }

    #message {
        padding: 15px 25px;
        font-size: 20px;
        border-radius: 20px
    }

    #celebration h1 {
        font-size: 36px
    }

    #celebration .stars {
        font-size: 45px;
        gap: 12px
    }

    #celebration #next-level-text {
        font-size: 18px
    }

    #pause-menu h2 {
        font-size: 32px
    }

    .menu-btn {
        min-width: 160px;
        padding: 12px 25px;
        font-size: 18px
    }
}

@media (max-width: 400px) {
    #lang-toggle {
        top: 8px;
        right: 8px
    }

    .lang-btn {
        width: 34px;
        height: 34px;
        font-size: 18px
    }

    #start-screen h1 {
        font-size: 26px
    }

    .track-option {
        width: 85px;
        height: 100px
    }

    .track-option .icon {
        font-size: 28px
    }

    .track-option .label {
        font-size: 14px
    }

    .track-btn {
        width: 60px;
        height: 60px
    }

    .track-btn::before {
        width: 18px;
        height: 18px
    }

    #track-buttons {
        gap: 15px
    }

    #hud {
        left: 5px;
        top: 5px
    }

    .star-slot {
        width: 18px;
        height: 18px;
        font-size: 12px
    }
}

/* Landscape on mobile */
@media (max-height: 500px) and (orientation: landscape) {
    #start-screen {
        gap: 15px;
        padding: 10px
    }

    #start-screen h1 {
        font-size: 28px
    }

    #start-screen p {
        font-size: 14px
    }

    .track-choice {
        gap: 15px
    }

    .track-option {
        width: 90px;
        height: 90px
    }

    #start-btn {
        padding: 10px 30px;
        font-size: 18px
    }

    #track-buttons {
        bottom: 10px
    }

    .track-btn {
        width: 55px;
        height: 55px
    }

    #celebration h1 {
        font-size: 28px
    }

    #celebration .stars {
        font-size: 35px
    }
}

/* Safe area for notched phones */
@supports (padding: env(safe-area-inset-bottom)) {
    #track-buttons {
        padding-bottom: calc(15px + env(safe-area-inset-bottom));
    }

    #hud {
        left: calc(8px + env(safe-area-inset-left));
        top: calc(8px + env(safe-area-inset-top));
    }

    #pause-btn {
        right: calc(10px + env(safe-area-inset-right));
        top: calc(10px + env(safe-area-inset-top));
    }

    #lang-toggle {
        right: calc(15px + env(safe-area-inset-right));
        top: calc(15px + env(safe-area-inset-top));
    }
}

#credits-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 6px;
    text-align: center;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    font-size: 12px;
    opacity: 0.85;
    z-index: 9999;
    pointer-events: auto;
}

#credits-bar a {
    color: inherit;
    text-decoration: underline;
    font-weight: 700;
}