:root {
    --bg-color: #f5f5f5;
    --panel-bg: rgba(255, 255, 255, 0.9);
    --border-color: #333333;
    --accent-blue: #0055ff;
    --accent-red: #ff2222;
    --text-primary: #333333;
    --text-secondary: #666666;
    --font-main: 'Outfit', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

#app {
    position: relative;
    width: 100%;
    height: 100%;
}

#canvas-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
}

canvas {
    display: block;
    background: #ffffff;
    border: 4px solid var(--border-color);
    border-radius: 4px;
}

/* UI Container */
#ui-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.glass-panel {
    background: var(--panel-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    pointer-events: auto;
    box-shadow: 4px 4px 0px rgba(0,0,0,0.2);
}

/* Stats Panel */
.stats-panel {
    width: 320px;
}

h1 {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    color: var(--border-color);
}

.stat-item {
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.value {
    font-size: 1.5rem;
    font-weight: 700;
}

.neon-text-cyan { color: var(--accent-blue); }
.neon-text-red { color: var(--accent-red); }

.progress-bar {
    width: 100%;
    height: 10px;
    background: #dddddd;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-blue);
    transition: width 0.3s ease;
}

/* Chat Panel */
.chat-panel {
    width: 350px;
    height: 300px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-header {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--border-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-right: 0.5rem;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.message {
    font-size: 0.9rem;
    line-height: 1.4;
}

.message.system { color: #888; font-style: italic; }
.message.user { color: var(--accent-blue); font-weight: 700; }
.message.text { color: var(--text-primary); }

.chat-input-container {
    display: flex;
    gap: 0.5rem;
}

input {
    flex: 1;
    background: #ffffff;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    padding: 0.6rem;
    color: var(--text-primary);
    outline: none;
    font-family: var(--font-main);
}

input:focus {
    border-color: var(--accent-blue);
}

button {
    background: var(--border-color);
    color: #ffffff;
    border: none;
    border-radius: 4px;
    padding: 0 1rem;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--font-main);
}

button:hover {
    background: var(--accent-blue);
}

/* Overlay */
#overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: opacity 0.3s;
}

#overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    background: white;
    padding: 3rem;
    border: 3px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 8px 8px 0px rgba(0,0,0,0.1);
}

#overlay-title {
    font-size: 3rem;
    font-weight: 900;
    color: var(--border-color);
    margin-bottom: 2rem;
}

#restart-btn {
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
    background: var(--accent-blue);
    color: white;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 4px 4px 0px rgba(0,0,0,0.2);
    transition: transform 0.1s;
}

#restart-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px rgba(0,0,0,0.2);
}

/* Settings Button */
#settings-btn {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: var(--panel-bg);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: all 0.2s;
    z-index: 1000;
}
#settings-btn:hover {
    background: var(--accent-blue);
    color: #fff;
    transform: scale(1.1);
}

/* Settings Modal */
#settings-modal {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(2px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}
#settings-modal.hidden {
    display: none;
}
.settings-content {
    width: 90%;
    max-width: 700px;
    max-height: 85%;
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--panel-bg);
    border: 3px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 8px 8px 0px rgba(0,0,0,0.1);
}
.settings-layout {
    display: flex;
    flex-direction: row;
    gap: 20px;
    flex: 1;
    min-height: 300px;
}
.settings-sidebar {
    width: 150px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border-right: 2px solid var(--border-color);
    padding-right: 15px;
}
.tab-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid transparent;
    border-radius: 6px;
    padding: 10px;
    text-align: left;
    font-size: 14px;
    transition: all 0.2s;
    font-weight: bold;
    cursor: pointer;
}
.tab-btn:hover {
    background: rgba(0,0,0,0.05);
}
.tab-btn.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--border-color);
}
.settings-panels {
    flex: 1;
    overflow-y: auto;
    padding-right: 10px;
}
.tab-pane {
    display: block;
}
.tab-pane.hidden {
    display: none;
}
.setting-group {
    background: #ffffff;
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.setting-group h3 {
    margin: 0 0 10px 0;
    font-size: 14px;
    color: var(--border-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 5px;
}
.setting-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 600;
}
.setting-group input {
    width: 60px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px;
    font-family: 'Outfit', sans-serif;
    text-align: right;
}
.setting-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
}