/* --- HIGH-END TECH AESTHETIC --- */
:root {
    --bg-color: #030303;
    --accent-cyan: #00f2ff;
    --accent-purple: #bd00ff;
    --text-dim: rgba(255, 255, 255, 0.3);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: #ffffff;
    font-family: 'Inter', sans-serif; /* Keep clean font */
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    user-select: none;
    position: relative;
}

.back-button {
    position: fixed;
    top: 30px;
    left: 30px;
    padding: 12px 24px;
    border-radius: 30px;
    color: #ffffff;
    text-decoration: none;
    font-weight: 300;
    letter-spacing: 1px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 100;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.3);
    text-transform: uppercase;
    font-size: 12px;
    z-index: 1000;
}

.back-button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #ffffff;
    text-shadow: 0 0 10px #ffffff;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

/* Ensure all buttons are always visible and clickable */
button {
    pointer-events: auto !important;
}

.back-button {
    pointer-events: auto !important;
}

button.lx-music-toggle {
    position: fixed !important;
    z-index: 1000 !important;
    display: flex !important;
    opacity: 1 !important;
    visibility: visible !important;
}

/* button.lx-music-toggle, */
button.playlist-toggle {
    position: fixed !important;
    z-index: 1000 !important;
    display: flex !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.glass-panel {
    background: rgba(10, 15, 30, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(240, 40, 40, 0.08);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
}

/* --- UI LAYER --- */
#ui-layer {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none; /* Allows click-through to 3D scene */
    z-index: 10;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 40px;
    transition: margin-left 0.3s ease;
}

/* Make sure interactive elements in UI layer have pointer events */
#ui-layer .header,
#ui-layer .footer {
    pointer-events: auto;
}


#ui-layer .footer-center {
    pointer-events: auto;
}

/* Adjust UI layer when LX Music panel is open */
body.lx-music-open #ui-layer {
    margin-left: 300px;
}

body.lx-music-open #canvas-container {
    margin-left: 300px;
    width: calc(100% - 300px);
}

/* --- HEADER --- */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 800; /* Thicker font for impact */
    letter-spacing: 4px;
    color: #fff;
    text-transform: uppercase;
    mix-blend-mode: exclusion;
    position:relative;
    left: calc(50% - 3 * 1.1rem);
}

.track-info {
    text-align: right;
}

.track-name {
    font-family: 'Courier New', monospace; /* Tech vibe */
    font-size: 0.75rem;
    color: var(--accent-cyan);
    letter-spacing: 1px;
    opacity: 0; /* Hidden by default */
    transition: opacity 0.5s;
    text-transform: uppercase;
}

/* --- BOTTOM BAR (Footer) --- */
.footer {
    display: grid;
    grid-template-columns: 1fr auto 1fr; /* Left, Center, Right */
    align-items: end;
    width: 100%;
    pointer-events: none;
}

/* Center: Upload Button */
.footer-center {
    display: flex;
    justify-content: center;
    pointer-events: auto; /* Enable clicks */
}

.upload-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: rgba(255, 255, 255, 0.8);
    padding: 12px 30px;
    font-size: 0.7rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    cursor: pointer;
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.upload-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 242, 255, 0.15);
    color: #fff;
}

.footer-left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-end;
}

.footer-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-end;
}

.monitor-label {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-bottom: 5px;
    letter-spacing: 1px;
}

#mini-monitor {
    width: 240px;
    height: 80px;
    border-bottom: 1px solid var(--accent-cyan);
    border-left: 1px solid var(--glass-border);
    background: linear-gradient(to top, rgba(0, 242, 255, 0.05), transparent);
}

/* Playlist styles */
.playlist-container {
    position: absolute;
    top: 40px; /* 紧贴header下边界，header高度约为40px */
    right: 20px;
    transform: none;
    width: 250px;
    max-height: calc(100vh - 80px); /* 减去上下padding */
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 15px;
    backdrop-filter: blur(10px);
    z-index: 20;
    overflow-y: auto;
}

.playlist-header {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--accent-cyan);
    text-align: center;
}

.playlist {
    list-style: none;
}

.playlist li {
    padding: 8px 5px;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s;
}

.playlist li:hover {
    color: #fff;
}

.playlist li.active {
    color: var(--accent-cyan);
}

.playlist li:last-child {
    border-bottom: none;
}

.playlist-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--accent-cyan);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    font-size: 1.2rem;
    transition: all 0.3s ease;
    pointer-events: auto;
}

.playlist-toggle:hover {
    background: rgba(0, 242, 255, 0.1);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 242, 255, 0.3);
}

.lx-music-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--accent-purple);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    font-size: 1.2rem;
    font-weight: bold;
    transition: all 0.3s ease;
    pointer-events: auto;
}

.lx-music-toggle:hover {
    background: rgba(189, 0, 255, 0.1);
    border-color: var(--accent-purple);
    box-shadow: 0 0 15px rgba(189, 0, 255, 0.3);
}

/* Debug styles to ensure buttons are visible */
.lx-music-toggle,
.playlist-toggle {
    opacity: 1 !important;
    visibility: visible !important;
    display: flex !important;
}

/* LX Music container styles */
.lx-music-container {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 300px !important;
    height: 100vh !important;
    background: var(--glass-bg);
    border-right: 1px solid var(--glass-border);
    padding: 20px;
    backdrop-filter: blur(10px);
    z-index: 500 !important;
    overflow: hidden;
    display: none;
}

.lx-music-header {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--accent-purple);
    text-align: center;
}

.api-controls {
    margin-bottom: 15px;
}

.api-controls input {
    width: 100%;
    padding: 8px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--glass-border);
    color: white;
    border-radius: 4px;
}

.api-controls button {
    width: 100%;
    margin-top: 10px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--accent-cyan);
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
}

.current-track-info {
    margin-bottom: 15px;
    padding: 10px;
    background: rgba(0,0,0,0.2);
    border-radius: 5px;
}

#lx-track-name {
    color: var(--accent-cyan);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

#lx-artist {
    color: rgba(255,255,255,0.7);
    font-size: 0.8rem;
    margin-bottom: 5px;
}

#lx-album {
    color: rgba(255,255,255,0.5);
    font-size: 0.7rem;
    margin-bottom: 10px;
}

#lx-progress {
    color: rgba(255,255,255,0.7);
    font-size: 0.7rem;
}

.current-lyric {
    min-height: 60px;
    padding: 10px;
    background: rgba(0,0,0,0.2);
    border-radius: 5px;
    color: rgba(255,255,255,0.8);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.controls {
    display: flex;
    justify-content: space-between;
}

.controls button {
    flex: 1;
    margin: 0 2.5px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
}

.lx-playlist-header {
    font-size: 0.9rem;
    margin-bottom: 10px;
    color: var(--accent-purple);
    text-align: center;
}

.lx-playlist {
    max-height: 150px;
    overflow-y: auto;
    background: rgba(0,0,0,0.2);
    border-radius: 5px;
    padding: 5px;
}

.lx-playlist-item {
    padding: 5px;
    color: var(--accent-cyan);
    cursor: pointer;
    border-radius: 3px;
}

.lx-playlist-item.current {
    color: var(--accent-cyan);
}

/* Hidden Inputs */
input[type="file"] { 
    display: none; 
}

/* --- CANVAS 3D --- */
#canvas-container {
    position: absolute;
    top: 0; left: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    transition: margin-left 0.3s ease, width 0.3s ease;
}

/* Ensure buttons are always visible */
.lx-music-toggle,
.playlist-toggle {
    position: fixed !important;
    z-index: 1000 !important;
    pointer-events: auto !important;
}