:root {
    --neon-blue: #00f3ff;
    --neon-pink: #bc13fe;
    --neon-green: #0aff0a;
    --bg-dark: #050510;
}

body { 
    margin: 0; 
    overflow: hidden; 
    background-color: var(--bg-dark); 
    font-family: 'Rajdhani', sans-serif; 
    color: white;
    user-select: none;
    -webkit-user-select: none;
    transition: background-color 0.5s ease;
    padding-bottom: env(safe-area-inset-bottom);
    height: 100vh;
    height: 100dvh;
}

/* Cyberpunk UI Utilities */
.font-cyber { font-family: 'Orbitron', sans-serif; }

.cyber-border {
    position: relative;
    background: rgba(10, 10, 30, 0.85);
    border: 1px solid var(--neon-blue);
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.1);
    clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
    transition: border-color 0.5s ease;
}

.cyber-btn {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.05));
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.2s ease;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.cyber-btn:hover:not(:disabled) {
    background: var(--neon-blue);
    color: #000;
    box-shadow: 0 0 20px var(--neon-blue);
}

.cyber-btn:disabled {
    border-color: #555;
    color: #555;
    background: rgba(0,0,0,0.5);
    cursor: not-allowed;
}

.cyber-btn-primary {
    border-color: var(--neon-green);
    color: var(--neon-green);
}
.cyber-btn-primary:hover:not(:disabled) {
    background: var(--neon-green);
    color: #000;
    box-shadow: 0 0 20px var(--neon-green);
}

.cyber-btn-danger {
    border-color: var(--neon-pink);
    color: var(--neon-pink);
}
.cyber-btn-danger:hover:not(:disabled) {
    background: var(--neon-pink);
    color: #000;
    box-shadow: 0 0 20px var(--neon-pink);
}

/* Animations */
@keyframes pulse-glow {
    0%, 100% { text-shadow: 0 0 10px currentColor; }
    50% { text-shadow: 0 0 20px currentColor, 0 0 40px currentColor; }
}

.animate-pulse-glow { animation: pulse-glow 2s infinite; }

.loader {
    width: 60px; height: 60px;
    border: 4px solid var(--neon-blue);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

#canvas-container { z-index: 0; }
#ui-layer { z-index: 10; }

/* History Bar Scroll */
.history-scroll::-webkit-scrollbar { height: 4px; width: 4px; }
.history-scroll::-webkit-scrollbar-track { background: transparent; }
.history-scroll::-webkit-scrollbar-thumb { background: #333; border-radius: 2px; }

/* Floating Animation for HUD */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}
.floating { animation: float 3s ease-in-out infinite; }

/* Sidebar Transition */
#history-sidebar { transition: transform 0.3s ease-in-out; }
.sidebar-open { transform: translateX(0) !important; }
.sidebar-closed { transform: translateX(100%); }
/* Desktop: always show sidebar if large screen */
@media (min-width: 1024px) {
    .sidebar-closed { transform: translateX(0); }
}

/* TABLET & SMALLER: Hide sidebar toggle, make responsive */
@media (max-width: 1023px) {
    #history-sidebar { 
        position: fixed; 
        right: 0; 
        top: 0; 
        height: 100vh; 
        width: 80%;
        max-width: 300px;
        background: rgba(5, 5, 16, 0.95);
        border-left: 1px solid var(--neon-blue);
        z-index: 100;
        padding-bottom: env(safe-area-inset-bottom);
    }
    
    .sidebar-closed { transform: translateX(100%); }
    
    #ui-layer { 
        flex-direction: column;
        gap: 10px;
        padding-bottom: calc(1rem + env(safe-area-inset-bottom));
    }

    .controls-panel {
        width: 100%;
        max-width: 100%;
        padding-bottom: env(safe-area-inset-bottom);
    }

    .cyber-btn {
        padding: 12px 16px;
        min-height: 44px;
        font-size: 0.9rem;
        min-width: 44px;
    }
}

/* MOBILE: Tablets (768px - 1023px) */
@media (max-width: 768px) {
    body { overflow-x: hidden; }

    .controls-panel {
        flex-wrap: wrap;
        gap: 8px;
        padding: 12px;
        padding-bottom: calc(12px + env(safe-area-inset-bottom));
    }

    .cyber-btn {
        padding: 10px 12px;
        min-height: 44px;
        font-size: 0.85rem;
        flex: 1;
        min-width: 45%;
    }

    .loader { 
        width: 45px; 
        height: 45px; 
        border-width: 3px;
    }

    input[type="text"], input[type="number"], select {
        padding: 12px;
        min-height: 44px;
        font-size: 16px;
    }

    .cyber-border {
        padding: 12px;
    }

    .font-cyber {
        font-size: 0.95rem;
    }
}

/* MOBILE: Phones (480px - 768px) */
@media (max-width: 480px) {
    #ui-layer {
        padding: 10px;
        padding-bottom: calc(10px + env(safe-area-inset-bottom));
    }

    .controls-panel {
        gap: 6px;
        padding: 10px;
        padding-bottom: calc(10px + env(safe-area-inset-bottom));
    }

    .cyber-btn {
        padding: 10px 8px;
        min-height: 44px;
        font-size: 0.8rem;
        letter-spacing: 1px;
        min-width: 44px;
    }

    #history-sidebar {
        width: 90%;
        max-width: none;
        padding-bottom: calc(var(--safe-area-inset-bottom) + 1rem);
    }

    .cyber-border {
        padding: 10px;
        font-size: 0.9rem;
    }

    .font-cyber {
        font-size: 0.85rem;
    }

    .loader {
        width: 40px;
        height: 40px;
        border-width: 3px;
    }

    input, select {
        padding: 10px;
        min-height: 44px;
        font-size: 16px;
    }

    canvas {
        max-height: 70vh;
    }
}