/* --- GLOBAL RESET & LAYOUT --- */
html, body {
    margin: 0; 
    padding: 0;
    width: 100vw; 
    height: 100vh;
    overflow: hidden; 
    background-color: #050505;
    color: white;
    font-family: 'Courier New', Courier, monospace;
}

/* --- BOOT SCREENS --- */
#loadingScreen {
    position: absolute; top: 0; left: 0;
    width: 100vw; height: 100vh;
    background-color: #000000;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    z-index: 100;
}

#loadingCrab {
    width: 80px;
    image-rendering: pixelated;
    margin-bottom: 20px;
    animation: loadingRainbow 2s linear infinite;
}

@keyframes loadingRainbow {
    0% { filter: hue-rotate(0deg) saturate(3); }
    100% { filter: hue-rotate(360deg) saturate(3); }
}

.loader-bar {
    width: 250px; height: 10px;
    border: 2px solid #ffffff;
    border-radius: 4px; overflow: hidden;
}

.loader-fill {
    height: 100%; width: 0%;
    background-color: #ffffff;
    animation: fillBar 1.5s ease-in-out forwards;
}

@keyframes fillBar {
    to { width: 100%; }
}

#mainMenu {
    position: absolute; top: 0; left: 0;
    width: 100vw; height: 100vh;
    background-image: url('background.gif');
    background-size: cover; background-position: center bottom;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    z-index: 50;
    box-shadow: inset 0 0 150px rgba(0,0,0,0.8);
}

/* Menu Logo Styling */
#menuLogo {
    width: 80%;
    max-width: 600px;
    margin-bottom: 40px;
    filter: drop-shadow(4px 4px 0px #0a141e) drop-shadow(0 0 20px rgba(77,166,255,0.5));
}

.menu-buttons {
    display: flex; flex-direction: column; gap: 15px; width: 250px;
}

/* --- MAIN GAME LAYER --- */
#gameLayer {
    width: 100vw; height: 100vh;
    flex-direction: row; 
}

/* --- SIDEBAR SHOP --- */
#shop {
    width: 350px; min-width: 350px; height: 100vh;
    background: rgba(10, 20, 30, 0.95);
    border-right: 2px solid #4da6ff; padding: 20px; 
    box-sizing: border-box; overflow-y: auto; 
    z-index: 10; box-shadow: 5px 0 15px rgba(0, 0, 0, 0.5);
}

/* Sidebar Logo Styling */
#sidebarLogo {
    width: 100%;
    max-width: 280px;
    display: block;
    margin: 0 auto 10px auto;
    padding-bottom: 15px;
    border-bottom: 2px solid #4da6ff;
}

/* --- THE TANK CANVAS --- */
#gameCanvas {
    flex-grow: 1; min-width: 0; height: 100vh; 
    display: block; cursor: crosshair;
    background-image: url('background.gif');
    background-size: cover; background-position: center bottom;
    background-repeat: no-repeat; background-color: #0a3c59; 
}

/* --- HUD & UI OVERLAYS --- */
#ui {
    position: absolute; top: 20px; left: 370px; 
    z-index: 5; pointer-events: none; 
    background: rgba(0, 0, 0, 0.6); padding: 15px; 
    border-radius: 8px; border-left: 4px solid #ffcc00;
}

#crabKey {
    position: absolute; bottom: 20px; left: 370px; 
    background: rgba(5, 20, 30, 0.9);
    border: 1px solid #4da6ff; border-radius: 8px;
    padding: 12px; display: flex; flex-wrap: wrap;
    max-width: calc(100% - 400px); gap: 15px;
    pointer-events: none; font-size: 10px;
}

/* --- TYPOGRAPHY & BUTTONS --- */
h2 { color: #4da6ff; text-transform: uppercase; margin-top: 20px; font-size: 14px; }

button {
    width: 100%; background: #0a141e; border: 1px solid #4da6ff;
    color: #4da6ff; padding: 12px; font-weight: bold; 
    cursor: pointer; border-radius: 4px; font-family: inherit; transition: all 0.2s;
}

/* Standard Blue Hover for most buttons (including Harvest) */
button:hover:not(:disabled) { background: #4da6ff; color: #050505; box-shadow: 0 0 10px #4da6ff; }
button:disabled { border-color: #222; color: #444; cursor: not-allowed; background: #050505; }

/* Specific Overrides */
#btnHardReset { border-color: #ff4d4d; color: #ff4d4d; }
#btnHardReset:hover:not(:disabled) { background: #ff4d4d; color: white; box-shadow: 0 0 10px #ff4d4d; }

#btnPrestige { border-color: #ffcc00; color: #ffcc00; }
#btnPrestige:hover:not(:disabled) { background: #ffcc00; color: black; box-shadow: 0 0 10px #ffcc00; }

#harvestSelect { width: 100%; margin-bottom: 12px; padding: 10px; background: #000; color: #4da6ff; border: 1px solid #4da6ff; font-family: inherit; font-weight: bold; border-radius: 4px; }

/* --- UTILS --- */
.key-item { display: flex; flex-direction: column; align-items: center; text-align: center; color: white; }
#shop::-webkit-scrollbar { width: 6px; }
#shop::-webkit-scrollbar-track { background: #050505; }
#shop::-webkit-scrollbar-thumb { background: #4da6ff; border-radius: 10px; }