* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-drag: none;
}

body {
    background-color: #000;
    color: #fff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow: hidden;
    /* Prevent body scroll, handle in #feed */
    width: 100vw;
    height: 100vh;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    max-width: 480px;
    /* Mobile width on desktop */
    margin: 0 auto;
    background: #111;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

/* Scroll Feed */
#feed {
    width: 100%;
    height: 100%;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    scrollbar-width: none;
    /* Firefox */
}

#feed::-webkit-scrollbar {
    display: none;
    /* Chrome/Safari */
}

/* Individual Slide */
.slide {
    width: 100%;
    height: 100%;
    scroll-snap-align: start;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #000;
    overflow: hidden;
    border-bottom: 1px solid #222;
}

/* Canvas content */
canvas.video-content {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Intro UI */
.intro-slide {
    flex-direction: column;
    text-align: center;
    background: linear-gradient(45deg, #2c3e50, #000000);
    padding: 20px;
}

.intro-slide h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(to right, #ff00cc, #3333ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.instruction {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 10px;
    margin: 20px 0;
    line-height: 1.6;
}

#start-btn {
    padding: 15px 40px;
    font-size: 1.5rem;
    background: #ff0055;
    color: white;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    animation: pulse 1.5s infinite;
}

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

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

/* UI Overlay */
#ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    /* Allow click through to Feed */
}

.top-bar {
    position: absolute;
    top: 40px;
    /* Safe area */
    width: 100%;
    display: flex;
    justify-content: space-around;
    font-size: 1.2rem;
    font-weight: bold;
    text-shadow: 1px 1px 2px black;
    z-index: 10;
}

#time-display {
    color: #ffeb3b;
}

.action-bar {
    position: absolute;
    right: 10px;
    bottom: 100px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    pointer-events: auto;
    /* Enable buttons */
}

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    opacity: 0.9;
    transition: transform 0.1s;
}

.action-btn:active {
    transform: scale(0.9);
}

.action-btn i {
    font-size: 2.5rem;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.action-btn .count {
    font-size: 0.8rem;
    margin-top: 5px;
    text-shadow: 1px 1px 1px black;
}

.functional:active i {
    color: #ff4444;
    /* Feedback for dislike */
}

.video-info {
    position: absolute;
    bottom: 20px;
    left: 10px;
    width: 70%;
    text-align: left;
    text-shadow: 1px 1px 2px black;
}

.video-info .author {
    font-weight: bold;
    margin-bottom: 5px;
}

.video-info .description {
    font-size: 0.9rem;
    margin-bottom: 10px;
    line-height: 1.2;
}

.video-info .music {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
}

.video-info .music::before {
    content: '♫';
    margin-right: 5px;
}

/* Game Over */
#game-over {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    pointer-events: auto;
}

#game-over h2 {
    font-size: 3rem;
    color: #ff0055;
    margin-bottom: 20px;
}

#game-over button {
    padding: 10px 30px;
    font-size: 1.2rem;
    margin-top: 20px;
    cursor: pointer;
}

.home-link {
    margin-top: 20px;
    color: #ccc;
    text-decoration: none;
}

/* Bonus Animation */
.bonus-popup {
    position: absolute;
    color: #00ff00;
    font-size: 2rem;
    font-weight: bold;
    animation: fadeUp 1s forwards;
    pointer-events: none;
}

@keyframes fadeUp {
    0% {
        transform: translateY(0);
        opacity: 1;
    }

    100% {
        transform: translateY(-50px);
        opacity: 0;
    }
}