/**
 * COMPLETE PERFORMANCE UI SYSTEM
 * ==============================
 * 
 * Complete, portable UI system for web-based performance pieces.
 * Includes everything needed: base page styling, album cover display,
 * loading interface, and modular control panel system.
 * 
 * DESIGN PRINCIPLES:
 * - Glass-morphism aesthetic with backdrop blur effects
 * - Professional audio interface conventions
 * - Mobile-first responsive design using viewport units
 * - Completely self-contained and portable
 * - Identical appearance and behavior across all projects
 * 
 * PORTABILITY FEATURES:
 * - Drop-in CSS file that provides complete UI system
 * - Standardized album cover sizing (always square, responsive)
 * - Unified control panel with consistent icons and behavior
 * - Identical loading interface across all projects
 * - Mobile responsive breakpoints work everywhere
 * 
 * INTEGRATION:
 * Simply include this CSS file in any project. No additional CSS needed.
 * Projects just need: index.html + project.js + album-cover.webp
 */

/* ===== BASE PAGE STYLING ===== */
/* Global reset and foundational appearance for all performance pieces */
body {
    margin: 0;
    padding: 0;
    background: #fff;
    overflow: hidden;
    color: #fff;
    font-family: Arial, sans-serif;
}

/* ===== MAIN CONTAINER ===== */
/* Full viewport container for album cover and UI overlays */
#container {
    position: relative;
    width: 100vw;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    box-sizing: border-box;
}

/* ===== ALBUM COVER ===== */
/* Standardized square album cover that adapts to all devices */
#albumCover {
    /* Responsive sizing - always square, fits within viewport */
    width: min(100vh, 100vw);
    height: min(100vh, 100vw);
    max-width: 100vw;
    max-height: 100vh;
    
    object-fit: contain;
    object-position: center;
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 1;
}

/* ===== HIDDEN THREE.JS CANVAS ===== */
/* Hide 3D canvas for audio-only interface while keeping it functional */
canvas {
    display: none !important;
}

/* ===== LOADING INTERFACE ===== */
/* Standardized loading interface for all projects */
#loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 101;
    color: white;
}

#loading h2 {
    margin-bottom: 20px;
    font-size: 24px;
    font-weight: normal;
}

#loading p {
    margin: 10px 0;
    font-size: 16px;
    opacity: 0.9;
}

/* Progress bar container */
#loading .progress-container {
    background: #333;
    width: 300px;
    height: 20px;
    margin: 10px auto;
    border: 1px solid #666;
    border-radius: 2px;
    overflow: hidden;
}

#progressBar {
    background: #0a84ff;
    height: 100%;
    width: 0%;
    transition: width 0.3s ease;
}

/* Log panels */
#errorLog, #successLog {
    margin-top: 10px;
    max-height: 150px;
    overflow-y: auto;
    padding: 10px;
    border: 1px solid #666;
    font-family: monospace;
    font-size: 12px;
    text-align: left;
    display: none;
    border-radius: 4px;
}

#errorLog {
    background: #222;
    margin-top: 20px;
    max-height: 200px;
}

#successLog {
    background: #1a2a1a;
    border-color: #4a6b4a;
    max-height: 100px;
}

#errorLog .log-title {
    color: #ff6b6b;
    margin-bottom: 5px;
    font-weight: bold;
}

#successLog .log-title {
    color: #90ee90;
    margin-bottom: 5px;
    font-weight: bold;
}

/* ===== PERFORMANCE UI CONTAINER ===== */
/* Legacy UI container - kept for JavaScript compatibility */
#ui {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 100;
    width: min(90vw, 400px);
    text-align: center;
    background: none;
    padding: 20px;
    border-radius: 0;
    backdrop-filter: none;
    box-shadow: none;
    display: none; /* Initially hidden */
}

/* ===== MOBILE RESPONSIVE ADJUSTMENTS ===== */
@media screen and (max-width: 768px) {
    #container {
        padding: 1vh 1vw;
    }
    
    #albumCover {
        width: min(93vh, 93vw);
        height: min(93vh, 93vw);
    }
    
    #loading h2 {
        font-size: 20px;
    }
    
    #loading p {
        font-size: 14px;
    }
}

/* Landscape mobile optimization */
@media screen and (max-height: 500px) and (orientation: landscape) {
    #albumCover {
        width: 90vh;
        height: 90vh;
    }
    
    #loading h2 {
        font-size: 18px;
    }
    
    #loading p {
        font-size: 13px;
    }
}

/* ===== MAIN CONTROL PANEL CONTAINER ===== */
/* 
 * Self-contained, modular control panel that can be dropped into any project.
 * Completely independent of parent container positioning.
 * Automatically calculates dimensions based on number of controls.
 */
.audio-control-panel {
    /* POSITIONING: Fixed to viewport, breaks out of all parent containers */
    position: fixed !important;
    left: 50% !important;
    bottom: 15vh !important;
    transform: translateX(-50%) !important;
    z-index: 9999 !important; /* Always on top */
    
    /* RESPONSIVE DIMENSIONS: Scale with viewport width */
    width: min(calc(4 * 12vw + 3 * 6vw + 8vw), 380px); /* Responsive width for 4 controls, capped at 380px */
    padding: min(2vw, 9px); /* Further reduced padding - 1/3 smaller again */
    box-sizing: border-box;
    
    /* VISUAL STYLING: Modern glass-morphism design */
    background: rgba(40, 40, 40, 0.6);
    backdrop-filter: blur(3px);
    border-radius: min(2.5vw, 12px); /* Responsive border radius */
    box-shadow: 0 min(1.5vw, 8px) min(6vw, 32px) rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    
    /* AUTO-FADE: Smooth opacity transition for inactivity fade */
    transition: opacity 0.5s ease;
    
    /* RESET: Remove any inherited styling */
    margin: 0 !important;
    display: block !important;
    position: fixed !important; /* Repeated for emphasis */
}

/* Inactive state - fades to 50% opacity after 15 seconds of no user activity */
.audio-control-panel.inactive {
    opacity: 0.5;
}

/* ===== AUDIO STATUS SYSTEM ===== */
/* Complete audio status display system with progress bar functionality */
/* Based on Sacred Migration's working implementation */

/* Main status text container */
.audio-control-panel .status-text,
#audioStatus {
    /* Typography */
    font-size: 14px;        /* Readable size */
    opacity: 0.8;           /* Subtle transparency */
    line-height: 1.4;       /* Good readability */
    text-align: center;     /* Center text within container */
    color: white;
    
    /* Use linear gradient background that can be controlled by CSS custom property */
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.2) 0%, 
        rgba(255, 255, 255, 0.2) var(--progress-width, 0%), 
        transparent var(--progress-width, 0%), 
        transparent 100%);
    
    padding: 10px 15px;     /* Comfortable padding around text */
    border-radius: 8px;     /* Rounded corners for modern look */
    backdrop-filter: blur(10px); /* Blur effect for glass-like appearance */
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3); /* Subtle shadow for depth */
    
    /* Layout positioning - match control grid width */
    display: block;
    width: calc(3 * 60px + 2 * 30px); /* Same width as control grid */
    margin: 0 auto 25px auto;
    box-sizing: border-box;
    position: relative;
    overflow: hidden;
    
    /* Smooth transition for progress changes */
    transition: background 0.3s ease;
}

/* Progress bar that fills behind status text during audio loading */
#audioProgressBar {
    position: absolute;     /* Position behind text */
    top: 0;                /* Align with top of container */
    left: 0;               /* Start from left edge */
    height: 100%;          /* Fill full height of container */
    width: 0%;             /* Start at 0% width */
    
    /* Subtle progress fill that doesn't interfere with text readability */
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.2), 
        rgba(255, 255, 255, 0.3)); /* Subtle white gradient */
    border-radius: 8px;     /* Match container border radius */
    
    /* Smooth animation */
    transition: width 0.3s ease; /* Smooth width changes */
    
    /* Ensure it stays behind text but above container background */
    z-index: 1;           /* Above container background, below text */
}

/* Text content that appears above the progress bar */
#audioStatusText {
    position: relative;    /* Ensure text appears above progress bar */
    z-index: 2;           /* Above progress bar */
    /* Add text shadow for readability over progress bar */
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

/* Control row layout */
.audio-control-panel .control-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: min(6vw, 30px); /* Responsive gap */
}

/* Control column layout */
.audio-control-panel .control-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: min(1.5vw, 8px); /* Responsive gap */
}

/* Control labels */
.audio-control-panel .control-label {
    font-size: min(2.4vw, 12px); /* Responsive font size */
    opacity: 0.6;
    color: white;
    margin: 0;
}

/* ===== INDIVIDUAL CONTROL STYLING ===== */
/* Unified control styling for perfect alignment */
.control-item {
    /* RESPONSIVE DIMENSIONS: Scale with viewport, maintaining square aspect ratio */
    width: min(12vw, 60px);
    height: min(12vw, 60px); /* Same as width to maintain square */
    min-width: 40px; /* Minimum size for usability */
    min-height: 40px;
    
    border: min(0.4vw, 2px) solid rgba(255, 255, 255, 0.4);
    border-radius: min(1.5vw, 8px); /* Responsive border radius */
    background: rgba(96, 96, 96, 0.5);
    backdrop-filter: blur(0.3px);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-sizing: border-box;
    position: relative;
    /* Reset any default button styling */
    padding: 0;
    margin: 0;
    outline: none;
}

.control-item:hover {
    background: rgba(64, 64, 64, 0.6);
    border-color: rgba(255, 255, 255, 0.6);
}

/* Start button specific styling */
/* ===== START BUTTON ICONS ===== */
/* Standardized CSS-drawn icons for consistent appearance across projects */

/* Play icon (triangle) */
.play-icon {
    width: 0;
    height: 0;
    border-left: min(2.4vw, 12px) solid rgba(255, 255, 255, 0.9);
    border-top: min(1.6vw, 8px) solid transparent;
    border-bottom: min(1.6vw, 8px) solid transparent;
    margin-left: min(0.6vw, 3px);
    display: block;
}

/* Stop icon (square using border technique) */
.stop-icon {
    width: 0;
    height: 0;
    border: min(1.4vw, 7px) solid rgba(255, 255, 255, 0.9);
    display: none;
}

/* Start button styling with state-based colors */
#startBtn {
    background: linear-gradient(135deg, 
        rgba(96, 96, 96, 0.5), 
        rgba(96, 116, 96, 0.5)); /* Faint green tint */
}

#startBtn:hover {
    background: linear-gradient(135deg, 
        rgba(64, 64, 64, 0.6), 
        rgba(64, 84, 64, 0.6)); /* Darker with faint green */
}

#startBtn.running {
    background: linear-gradient(135deg, 
        rgba(96, 96, 96, 0.5), 
        rgba(116, 96, 96, 0.5)); /* Faint red tint */
}

#startBtn.running:hover {
    background: linear-gradient(135deg, 
        rgba(64, 64, 64, 0.6), 
        rgba(84, 64, 64, 0.6)); /* Darker with faint red */
}

/* Icon state management for start/stop toggle */
#startBtn.running .play-icon {
    display: none;
}

#startBtn.running .stop-icon {
    display: block;
}

/* ===== VOLUME KNOB STYLING ===== */
/* Interactive rotary control with indicator */
#volumeKnob {
    border-radius: 50%; /* Always circular */
    background: conic-gradient(from 0deg, rgba(255,255,255,0.3) 0deg, rgba(255,255,255,0.1) 360deg);
    box-shadow: 0 min(0.4vw, 2px) min(1.5vw, 8px) rgba(0,0,0,0.3);
}

/* Volume knob indicator */
#volumeIndicator {
    position: absolute;
    top: min(0.8vw, 4px);
    left: 50%;
    width: min(0.6vw, 3px);
    height: min(4vw, 20px);
    background: rgba(255,255,255,0.9);
    border-radius: min(0.4vw, 2px);
    transform-origin: 50% min(5.2vw, 26px);
    transform: translateX(-50%) rotate(0deg);
    transition: transform 0.1s ease;
}

/* ===== TIMER BUTTON ICON ===== */
/* CSS-drawn clock icon for consistency */
#timerBtn .timer-icon {
    position: relative;
    width: min(4vw, 20px);
    height: min(4vw, 20px);
    border: min(0.4vw, 2px) solid rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Clock hands */
#timerBtn .timer-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: min(0.4vw, 2px);
    height: min(1.6vw, 8px);
    background: rgba(255, 255, 255, 0.9);
    transform-origin: bottom center;
    transform: translate(-50%, -100%) rotate(-90deg);
}

#timerBtn .timer-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: min(0.4vw, 2px);
    height: min(1.2vw, 6px);
    background: rgba(255, 255, 255, 0.9);
    transform-origin: bottom center;
    transform: translate(-50%, -100%) rotate(0deg);
}

/* Center dot */
#timerBtn .timer-center {
    position: absolute;
    top: 50%;
    left: 50%;
    width: min(0.6vw, 3px);
    height: min(0.6vw, 3px);
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

/* ===== INFO BUTTON STYLING ===== */
/* Simple text-based info button */
#infoBtn {
    font-size: min(4.8vw, 24px);
    color: rgba(255, 255, 255, 0.9);
    font-weight: bold;
    line-height: 1;
}

/* ===== TOOLTIP SYSTEM ===== */
/* 
 * CSS-only tooltips that appear on hover over control buttons.
 * Uses data-tooltip attributes on HTML elements to store tooltip text.
 * Positioned above control items with consistent dark styling.
 */
.control-item[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: min(2vw, 10px);
    
    /* Responsive sizing */
    padding: min(1.5vw, 8px) min(2.5vw, 12px);
    min-width: max-content;
    
    /* Visual styling - match control panel design */
    background: rgba(40, 40, 40, 0.9);
    backdrop-filter: blur(3px);
    color: white;
    font-size: min(2.4vw, 12px);
    border-radius: min(1vw, 6px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 min(1vw, 4px) min(2vw, 12px) rgba(0, 0, 0, 0.3);
    
    /* Animation */
    opacity: 0;
    animation: tooltipFadeIn 0.3s ease forwards;
    
    /* Positioning */
    z-index: 1000;
    pointer-events: none;
    white-space: nowrap;
}

/* Tooltip arrow */
.control-item[data-tooltip]:hover::before {
    content: '';
    position: absolute;
    bottom: calc(100% - min(1vw, 5px));
    left: 50%;
    transform: translateX(-50%);
    
    width: 0;
    height: 0;
    border-left: min(1.5vw, 6px) solid transparent;
    border-right: min(1.5vw, 6px) solid transparent;
    border-top: min(1.5vw, 6px) solid rgba(40, 40, 40, 0.9);
    
    z-index: 1001;
    pointer-events: none;
    opacity: 0;
    animation: tooltipFadeIn 0.3s ease forwards;
}

@keyframes tooltipFadeIn {
    from { opacity: 0; transform: translateX(-50%) translateY(5px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ===== TIMER MODAL ===== */
/* 
 * Timer modal for setting performance auto-stop duration.
 * Overlays control panel exactly with solid background.
 * Part of modular control panel system.
 */
.audio-control-panel .timer-modal {
    /* POSITIONING: Exactly on top of control panel */
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    
    /* VISUAL STYLING: Solid overlay */
    background: rgb(40, 40, 40);
    border-radius: min(2.5vw, 12px);
    box-shadow: 0 min(1.5vw, 8px) min(6vw, 32px) rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    
    /* Z-INDEX: Above control panel content */
    z-index: 15;
    
    /* CENTER CONTENT */
    align-items: center;
    justify-content: center;
    
    /* INITIALLY HIDDEN */
    display: none;
    padding: min(4vw, 20px);
    box-sizing: border-box;
}

.audio-control-panel .timer-content {
    text-align: center;
    color: white;
    width: 100%;
    max-width: 280px;
}

.audio-control-panel .timer-input-container {
    margin: min(3vw, 15px) 0;
}

.audio-control-panel .timer-input-container label {
    display: block;
    margin-bottom: min(2vw, 10px);
    font-size: min(2.8vw, 14px);
    opacity: 0.8;
}

.audio-control-panel .timer-input-container input {
    width: 100%;
    padding: min(2.5vw, 12px);
    font-size: min(3.2vw, 16px);
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: min(1.5vw, 8px);
    color: white;
    outline: none;
    font-family: 'Courier New', monospace;
    letter-spacing: 1px;
    box-sizing: border-box;
}

.audio-control-panel .timer-input-container input:focus {
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
}

.audio-control-panel .timer-buttons {
    display: flex;
    gap: min(3vw, 15px);
    margin-top: min(4vw, 20px);
    justify-content: center;
}

.audio-control-panel .timer-btn {
    flex: 1;
    padding: min(2.5vw, 12px) min(4vw, 20px);
    font-size: min(2.8vw, 14px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: min(1.5vw, 8px);
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-weight: 500;
    outline: none;
}

.audio-control-panel .timer-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.audio-control-panel .timer-btn.ok-btn {
    background: rgba(76, 175, 80, 0.3);
    border-color: rgba(76, 175, 80, 0.5);
}

.audio-control-panel .timer-btn.ok-btn:hover {
    background: rgba(76, 175, 80, 0.4);
    border-color: rgba(76, 175, 80, 0.7);
}

/* ===== INFO OVERLAY ===== */
/* 
 * Info overlay displaying contextual information about the performance.
 * Overlays control panel exactly with scrollable content and sticky close button.
 * Part of modular control panel system for easy customization.
 */
.audio-control-panel .info-overlay {
    /* POSITIONING: Exactly on top of control panel */
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    
    /* NO RESPONSIVE OVERRIDES: Use control panel's exact dimensions */
    padding: min(4vw, 20px); /* Match control panel padding */
    box-sizing: border-box;
    
    /* SCROLLING: Handle overflow content */
    overflow-y: auto;
    
    /* VISUAL STYLING: Solid overlay, no transparency */
    background: rgb(40, 40, 40); /* Solid background, no transparency */
    border-radius: min(2.5vw, 12px); /* Match control panel border radius */
    box-shadow: 0 min(1.5vw, 8px) min(6vw, 32px) rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    
    /* TEXT STYLING: Responsive and readable */
    color: white;
    font-size: min(3.2vw, 16px); /* Responsive font size */
    line-height: 1.5;
    text-align: left;
    
    /* INITIALLY HIDDEN */
    display: none;
    
    /* Z-INDEX: Above control panel content */
    z-index: 10;
}

/* Close button styling - stays fixed during scroll */
.audio-control-panel .info-overlay .close-btn {
    position: sticky; /* Sticks to top of scrolling container */
    top: min(3vw, 15px); /* Distance from top when stuck */
    float: right; /* Align to right */
    margin-left: auto; /* Push to right edge */
    margin-bottom: min(3vw, 15px); /* Space below button */
    width: min(8vw, 40px);
    height: min(8vw, 40px);
    min-width: 32px; /* Larger touch target for mobile */
    min-height: 32px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    color: white;
    font-size: min(5vw, 24px);
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    /* Reset button defaults */
    padding: 0;
    margin: 0;
    outline: none;
    z-index: 10001; /* Above overlay content */
}

.audio-control-panel .info-overlay .close-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.6);
}

/* ===== MOBILE RESPONSIVE ADJUSTMENTS ===== */

/* Mobile tooltip adjustments */
@media screen and (max-width: 768px) {
    .control-item[data-tooltip]:hover::after {
        font-size: 11px;
        padding: 6px 10px;
        margin-bottom: 8px;
        border-radius: 4px;
    }
    
    .control-item[data-tooltip]:hover::before {
        border-left: 5px solid transparent;
        border-right: 5px solid transparent;
        border-top: 5px solid rgba(40, 40, 40, 0.9);
    }
    
    /* Mobile optimizations for timer modal */
    .audio-control-panel .timer-input-container label {
        font-size: 13px;
    }
    
    .audio-control-panel .timer-input-container input {
        font-size: 16px;
        padding: 10px;
    }
    
    .audio-control-panel .timer-btn {
        font-size: 13px;
        padding: 10px 16px;
    }
    
    /* Mobile icon adjustments */
    .play-icon {
        border-left: 10px solid rgba(255, 255, 255, 0.9);
        border-top: 6px solid transparent;
        border-bottom: 6px solid transparent;
        margin-left: 2px;
    }
    
    .stop-icon {
        border: 6px solid rgba(255, 255, 255, 0.9);
    }
    
    #volumeIndicator {
        top: 3px;
        width: 2px;
        height: 16px;
        transform-origin: 50% 22px;
    }
    
    #timerBtn .timer-icon {
        width: 16px;
        height: 16px;
        border-width: 1.5px;
    }
    
    #infoBtn {
        font-size: 20px;
    }
    
    /* Mobile optimizations for info overlay */
    .audio-control-panel .info-overlay {
        font-size: 14px; /* Fixed size on mobile for readability */
        padding: 15px; /* Fixed padding on mobile */
    }
    
    /* Mobile responsive adjustments for audio status */
    .audio-control-panel .status-text,
    #audioStatus {
        font-size: 13px; /* Smaller status text on mobile */
        margin-top: 10px; /* Less margin on mobile */
    }
    
    .audio-control-panel .info-overlay .close-btn {
        width: 36px; /* Larger touch target on mobile */
        height: 36px;
        font-size: 20px;
        top: 10px;
        right: 10px;
    }
}

/* High-DPI display optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .audio-control-panel {
        /* Enhance blur and shadow effects on high-DPI displays */
        backdrop-filter: blur(12px);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    }
    
    .control-item {
        /* Enhance button effects on high-DPI displays */
        backdrop-filter: blur(8px);
    }
}