:root {
    --bg-gradient: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --accent-red: #ff3e5e;
    --accent-green: #2ecc71;
    --text-white: #ffffff;
    --text-dim: #c0c0c0;
    --font-main: 'Outfit', sans-serif;
}

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

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

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

#canvas-3d {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* UI Overlay Layout */
#ui-container {
    position: relative;
    z-index: 10;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    justify-content: space-between;
    padding: 2rem;
}

#ui-container * {
    pointer-events: auto;
}

header {
    position: absolute;
    top: 2rem;
    left: 2rem;
    pointer-events: none;
    z-index: 11;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo .emoji {
    font-size: 2.5rem;
}

.logo h1 {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.logo h1 span {
    font-weight: 300;
    color: var(--accent-red);
}

.tagline {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 0.2rem;
    text-transform: uppercase;
}

.side-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 320px;
}

.left {
    margin-top: 8rem;
}

.right {
    margin-top: 8rem;
}

/* UI Components: Glass Cards */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.glass:hover {
    border-color: rgba(255, 62, 94, 0.3);
}

h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--accent-red);
}

.info-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.info-item .label {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.info-item .value {
    font-weight: 600;
}

.description {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.6;
    margin-top: 1rem;
}

/* Controls */
.control-group {
    margin-bottom: 1rem;
}

.control-group label {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--text-dim);
}

input[type="range"] {
    width: 100%;
    margin: 10px 0;
    accent-color: var(--accent-red);
}

.toggle-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Points List */
.points-list {
    list-style: none;
}

.points-list li {
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
    transition: background 0.3s ease;
    border-radius: 8px;
}

.points-list li:hover {
    background: rgba(255, 62, 94, 0.05);
}

.points-list li strong {
    display: block;
    font-size: 1rem;
    margin-bottom: 0.2rem;
    color: var(--accent-green);
}

.points-list li p {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* Bottom Bar */
.bottom-bar {
    position: absolute;
    bottom: 2rem;
    width: 100%;
    display: flex;
    justify-content: center;
    left: 0;
    pointer-events: none;
}

.hint {
    background: rgba(0, 0, 0, 0.4);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--text-dim);
    border: 1px solid var(--glass-border);
}

/* Loader */
#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0f0c29;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 62, 94, 0.1);
    border-top-color: var(--accent-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

.loading-text {
    font-size: 1rem;
    letter-spacing: 2px;
    color: var(--text-dim);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 900px) {
    #ui-container {
        flex-direction: column;
        overflow-y: auto;
        padding: 5rem 1rem 1rem 1rem;
    }
    .side-panel {
        width: 100%;
    }
    .left, .right {
        margin-top: 0;
    }
}