body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: #000;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: white;
    user-select: none;
}

.container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#webcam {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
}

.overlay {
    position: absolute;
    z-index: 50;
}

.header {
    top: 20px;
    text-align: center;
    width: 100%;
    pointer-events: none;
    text-shadow: 0 2px 10px rgba(0,0,0,0.8);
}
.header h1 { margin: 0; font-size: 2rem; }
.header p { margin: 0; font-size: 1rem; opacity: 0.8; }

.logo-hkiit {
    top: 25px;
    left: 25px;
    pointer-events: none;
}
.logo-hkiit img { height: 160px; width: auto; }

.top-right-stack {
    top: 25px;
    right: 25px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 20px;
    pointer-events: none;
    z-index: 50;
}
.logo-it114115 img { height: 160px; width: auto; }

#settings-toggle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #4A90E2;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
    pointer-events: auto;
}

.status-panel {
    bottom: 25px;
    left: 25px;
    background: rgba(0, 0, 0, 0.5);
    padding: 15px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 16px;
    pointer-events: auto;
    cursor: pointer;
}
.status-item { display: flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #666; }
.dot.active { background: #4CAF50; box-shadow: 0 0 10px #4CAF50; }

.instructions {
    bottom: 25px;
    right: 25px;
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 12px;
    font-size: 18px;
    text-align: right;
    pointer-events: auto;
    position: absolute;
}

.right-panel-hide {
    position: absolute;
    top: -10px;
    left: -10px;
    width: 24px;
    height: 24px;
    background: #FF5252;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    border: 2px solid white;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    z-index: 10;
}

.instructions div {
    text-align: right;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.settings-panel {
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.85);
    padding: 0;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    width: 300px;
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    z-index: 100;
}
.settings-panel.hidden {
    transform: translateX(350px);
    opacity: 0;
    pointer-events: none;
}

.hidden { display: none !important; }

.settings-header {
    padding: 15px;
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.settings-header h3 { margin: 0; font-size: 14px; color: #4A90E2; }
.settings-header button { background: none; border: none; color: white; cursor: pointer; font-size: 18px; }

.settings-content { padding: 20px; display: flex; flex-direction: column; gap: 15px; }
.settings-panel label { font-size: 11px; display: block; margin-bottom: 4px; color: rgba(255,255,255,0.6); text-transform: uppercase; letter-spacing: 0.5px; }
.settings-panel input, .settings-panel select { width: 100%; background: #222; color: white; border: 1px solid rgba(255,255,255,0.2); padding: 8px; border-radius: 6px; box-sizing: border-box; font-size: 13px; }
.settings-panel select option { background: #222; color: white; }
.settings-panel button#save-settings { width: 100%; background: #4A90E2; color: white; border: none; padding: 10px; border-radius: 6px; cursor: pointer; font-weight: bold; margin-top: 5px; transition: background 0.2s; }
.settings-panel button#save-settings:active { background: #357ABD; }

/* VFX Styles */
#atmosphere-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
    background: transparent;
    transition: background 0.5s ease;
}

/* Integrated Player Style */
#integrated-player-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70%;
    max-width: 480px;
    aspect-ratio: 16/9;
    z-index: 400; /* High z-index to stay above everything when needed */
    background: rgba(0,0,0,0.4);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(74, 144, 226, 0.4);
    box-shadow: 0 0 20px rgba(0,0,0,0.6);
    transition: opacity 0.5s ease;
    pointer-events: none;
    display: flex;
}
#integrated-player-container.hidden { display: none; }
#integrated-player { width: 100%; height: 100%; object-fit: contain; }

#output-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transform: scaleX(-1);
    z-index: 40; /* Skeleton on top of EVERYTHING */
}

#vfx-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transform: scaleX(-1);
    z-index: 10; /* Between Camera and Video */
    opacity: 0.9;
}

/* Start Overlay - Massive Z-Index for clickability */
#start-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    z-index: 200; /* Absolute Top for interaction */
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    overflow-y: auto; /* Handle small screens */
}

.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
    transform: translate3d(0, 0, 0);
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

@media (max-width: 768px) {
    .header { top: 10px; width: 100%; left: 0; padding: 8px 0; z-index: 60; }
    .header h1 { font-size: 0.9rem; }
    .header p { font-size: 0.5rem; }
    #domain-display { font-size: 1.2rem !important; }

    .settings-panel { 
        width: 100%; 
        right: 0; 
        top: 10% !important; 
        bottom: 0; 
        height: 90% !important;
        border-radius: 20px 20px 0 0;
        padding-bottom: 20px;
        background: rgba(0, 0, 0, 0.95);
        z-index: 150;
        display: flex;
        flex-direction: column;
    }
    .settings-content {
        overflow-y: auto;
        flex: 1;
    }
    #close-settings {
        padding: 10px;
        font-size: 24px;
    }
    
    .logo-hkiit { top: 10px; left: 10px; }
    .logo-hkiit img { height: 70px; }
    
    .top-right-stack { top: 10px; right: 10px; gap: 8px; z-index: 90; }
    .logo-it114115 img { height: 70px; }
    
    #settings-toggle, #game-toggle-btn { 
        width: 36px !important; 
        height: 36px !important; 
        font-size: 18px !important; 
    }

    .instructions { 
        width: 90%; 
        right: 5%; 
        bottom: 80px; 
        padding: 10px; 
        font-size: 12px;
        z-index: 100;
    }
    #right-panel-restore-btn {
        bottom: 25px !important;
        right: 15px !important;
    }

    .status-panel { 
        bottom: 25px; 
        top: auto; 
        left: 15px; 
        padding: 8px; 
        font-size: 10px; 
        z-index: 30;
    }

    .qr-container {
        bottom: 25px !important;
        left: 15px !important;
        padding: 4px !important;
    }
    .qr-container img {
        width: 60px !important;
        height: 60px !important;
    }
    #qr-label {
        font-size: 8px !important;
    }

    #game-over-title {
        font-size: 2.5rem !important;
    }
    #final-score-val {
        font-size: 2.5rem !important;
    }
    #label-final-score {
        font-size: 1.5rem !important;
    }
    #restart-game-btn {
        padding: 15px !important;
        font-size: 1.2rem !important;
    }
}

/* Landscape Mobile Optimization */
@media (max-width: 1024px) and (orientation: landscape) {
    .header { top: 5px; width: 100%; left: 0; padding: 5px 0; }
    .header h1 { font-size: 0.8rem; }
    .header p { display: none; }
    #domain-display { font-size: 1rem !important; margin-top: 5px; }

    .logo-hkiit { top: 5px; left: 10px; }
    .logo-hkiit img { height: 50px; }
    .logo-it114115 img { height: 50px; }
    #settings-toggle, #game-toggle-btn { 
        width: 36px !important; 
        height: 36px !important; 
        font-size: 18px !important; 
    }

    .instructions { 
        width: 60%; 
        right: 5px; 
        bottom: 50px; 
        padding: 8px; 
        font-size: 11px; 
    }
    #right-panel-restore-btn {
        bottom: 10px !important;
        right: 10px !important;
    }
    .status-panel { bottom: 10px; left: 10px; padding: 5px; font-size: 9px; flex-direction: row; gap: 10px; }
    
    .settings-panel { width: 300px; height: 100vh; right: 0; top: 0; border-radius: 0; z-index: 150; }
}

@keyframes success-pop {
    0% { transform: scale(0.5); opacity: 0; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(1); opacity: 0; }
}