:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --primary-color: #3d8bfd;
    --primary-hover: #5a9fff;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --border-color: #333333;

    --cell-size: 16px;
    --gap: 1px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* Grid Styles */
#grid-viewport {
    width: 100%;
    height: 100%;
    overflow: auto;
    cursor: grab;
}
#grid-viewport:active {
    cursor: grabbing;
}

#grid {
    display: grid;
    grid-template-columns: repeat(100, var(--cell-size));
    grid-template-rows: repeat(100, var(--cell-size));
    gap: var(--gap);
    background-color: var(--border-color);
    width: fit-content;
    padding: var(--gap);
}

.cell {
    background-color: #fff;
    transition: transform 0.1s ease-out, box-shadow 0.1s ease-out;
}
.cell:hover {
    transform: scale(1.5);
    z-index: 10;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
    cursor: pointer;
}

/* Controls Styles */
#controls {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    background-color: var(--surface-color);
    padding: 10px 20px;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    z-index: 100;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

#controls label {
    font-size: 1.5rem;
    cursor: pointer;
}

#colorPicker {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 32px;
    height: 32px;
    background-color: transparent;
    border: none;
    cursor: pointer;
}
#colorPicker::-webkit-color-swatch {
    border-radius: 50%;
    border: 2px solid var(--border-color);
}
#colorPicker::-moz-color-swatch {
    border-radius: 50%;
    border: 2px solid var(--border-color);
}

.zoom-controls button {
    width: 30px;
    height: 30px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-primary);
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background-color 0.2s;
}
.zoom-controls button:hover {
    background-color: var(--primary-color);
}
#zoom-level {
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 50px;
    text-align: center;
}

/* Chat Sidebar */
#chat-sidebar {
    position: fixed;
    right: 0;
    top: 0;
    width: 320px;
    height: 100%;
    background-color: var(--surface-color);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 200;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
}
#chat-sidebar.open {
    transform: translateX(0);
    box-shadow: -5px 0 20px rgba(0,0,0,0.4);
}
#chat-header {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
#chat-header h3 {
    font-weight: 600;
}
#chat-toggle-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}
#chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.chat-message {
    padding: 8px 12px;
    background: var(--bg-color);
    border-radius: 8px;
    max-width: 90%;
    word-wrap: break-word;
    font-size: 0.9rem;
}
.chat-message .timestamp {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-align: right;
}
#chat-input-area {
    display: flex;
    padding: 15px;
    border-top: 1px solid var(--border-color);
    gap: 10px;
}
#chat-input {
    flex-grow: 1;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 10px;
    font-size: 0.9rem;
}
#chat-send-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}
#chat-send-btn:hover {
    background-color: var(--primary-hover);
}
#chat-open-btn {
    position: fixed;
    right: 20px;
    top: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background-color: var(--surface-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    font-size: 1.8rem;
    cursor: pointer;
    z-index: 150;
    transition: transform 0.3s, opacity 0.3s;
}
#chat-open-btn.hidden {
    transform: scale(0.8);
    opacity: 0;
    pointer-events: none;
}