/**
 * PQ Crypta - Quantum Entanglement Sandbox Styles
 * October 2025 - Cutting-edge visual design
 */

/* CSS Variables */
:root {
    --quantum-primary: #00ffff;
    --quantum-secondary: #ff00ff;
    --quantum-tertiary: #ffff00;
    --quantum-danger: #ff1744;
    --quantum-success: #00e676;
    --quantum-bg: #0a0a0f;
    --quantum-bg-light: #1a1a2e;
    --quantum-bg-lighter: #2a2a3e;
    --quantum-text: #ffffff;
    --quantum-text-dim: #b0b0c0;
    --quantum-border: rgba(0, 255, 255, 0.3);
    --quantum-shadow: rgba(0, 255, 255, 0.5);
    --quantum-glow: 0 0 20px var(--quantum-shadow);
}

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

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--quantum-bg);
    color: var(--quantum-text);
    overflow: hidden;
    cursor: none; /* Hide default cursor */
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--quantum-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease-out;
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.quantum-loader {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.loader-orb {
    position: absolute;
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, var(--quantum-primary), var(--quantum-secondary));
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: var(--quantum-glow);
}

.loader-ring {
    position: absolute;
    width: 120px;
    height: 120px;
    border: 3px solid transparent;
    border-top-color: var(--quantum-primary);
    border-radius: 50%;
    animation: spin 1.5s linear infinite;
}

.loader-ring.delay-1 {
    width: 160px;
    height: 160px;
    border-top-color: var(--quantum-secondary);
    animation-delay: -0.5s;
    animation-duration: 2s;
}

.loader-ring.delay-2 {
    width: 200px;
    height: 200px;
    border-top-color: var(--quantum-tertiary);
    animation-delay: -1s;
    animation-duration: 2.5s;
}

.loading-text {
    position: absolute;
    bottom: -60px;
    font-size: 18px;
    color: var(--quantum-primary);
    text-align: center;
    animation: glow-text 2s ease-in-out infinite;
}

.loading-progress {
    position: absolute;
    bottom: -100px;
    width: 200px;
    height: 4px;
    background: var(--quantum-bg-light);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--quantum-primary), var(--quantum-secondary));
    animation: progress 3s ease-in-out infinite;
    box-shadow: 0 0 10px var(--quantum-primary);
}

/* Main App */
.app {
    width: 100%;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.app.hidden {
    display: none;
}

/* Quantum Canvas */
.quantum-canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.quantum-canvas {
    width: 100%;
    height: 100%;
    display: block;
    background: radial-gradient(ellipse at center, #1a1a2e 0%, #0a0a0f 100%);
}

/* Custom Quantum Cursor */
.quantum-cursor {
    position: fixed;
    width: 40px;
    height: 40px;
    border: 2px solid var(--quantum-primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: 10001; /* Above loading screen (10000), info panel (2000), control panel (1000) */
    transform: translate(-50%, -50%);
    transition: all 0.1s ease-out;
    box-shadow:
        0 0 20px var(--quantum-primary),
        inset 0 0 10px var(--quantum-primary);
    animation: cursor-pulse 2s ease-in-out infinite;
}

.quantum-cursor::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    background: var(--quantum-primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 10px var(--quantum-primary);
}

.quantum-cursor.active {
    width: 60px;
    height: 60px;
    border-color: var(--quantum-secondary);
    box-shadow:
        0 0 30px var(--quantum-secondary),
        inset 0 0 15px var(--quantum-secondary);
}

.quantum-cursor.repel {
    border-color: var(--quantum-danger);
    box-shadow:
        0 0 30px var(--quantum-danger),
        inset 0 0 15px var(--quantum-danger);
}

.quantum-cursor.entangle {
    border-color: var(--quantum-success);
    box-shadow:
        0 0 30px var(--quantum-success),
        inset 0 0 15px var(--quantum-success);
}

/* Particle Trail */
.particle-trail {
    position: fixed;
    pointer-events: none;
    z-index: 10000; /* Just below cursor, matches loading screen */
}

.trail-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--quantum-primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--quantum-primary);
    animation: trail-fade 1s ease-out forwards;
}

/* Floating Cards (Statistics & Actions) */
.floating-card {
    position: fixed;
    background: rgba(26, 26, 46, 0.95);
    border: 1px solid var(--quantum-border);
    border-radius: 12px;
    box-shadow: var(--quantum-glow);
    backdrop-filter: blur(10px);
    padding: 20px;
    z-index: 1000;
    transition: all 0.3s ease-out;
    animation: card-fade-in 0.5s ease-out;
    pointer-events: auto;
}

.floating-card:hover {
    box-shadow: 0 0 30px var(--quantum-shadow);
    border-color: var(--quantum-primary);
    transform: scale(1.02);
}

.floating-card h3 {
    font-size: 16px;
    color: var(--quantum-primary);
    text-shadow: 0 0 10px var(--quantum-primary);
    margin-bottom: 15px;
    text-align: center;
}

/* Statistics Card - Top Left */
.stats-card {
    top: 80px;
    left: 20px;
    min-width: 200px;
    animation-delay: 0.2s;
}

/* Actions Card - Bottom Left */
.actions-card {
    bottom: 20px;
    left: 20px;
    min-width: 240px;
    animation-delay: 0.3s;
}

.actions-card .action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

/* Card fade-in animation */
@keyframes card-fade-in {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Control Panel */
.control-panel {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 320px;
    max-height: calc(100vh - 100px);
    background: rgba(26, 26, 46, 0.95);
    border: 1px solid var(--quantum-border);
    border-radius: 12px;
    box-shadow: var(--quantum-glow);
    backdrop-filter: blur(10px);
    z-index: 1000;
    overflow: hidden;
    transition: transform 0.3s ease-out;
}

.panel-header {
    padding: 15px 20px;
    background: rgba(0, 255, 255, 0.1);
    border-bottom: 1px solid var(--quantum-border);
}

.panel-header h2 {
    font-size: 18px;
    color: var(--quantum-primary);
    text-shadow: 0 0 10px var(--quantum-primary);
}

.panel-content {
    max-height: calc(100vh - 160px);
    overflow-y: auto;
    overflow-x: hidden;
    padding: 20px;
    pointer-events: auto; /* Ensure scroll events are captured */
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on mobile */

    /* Firefox scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--quantum-primary) var(--quantum-bg-light);
}

/* Scrollbar Styling */
.panel-content::-webkit-scrollbar {
    width: 12px; /* Wider for easier grabbing */
}

.panel-content::-webkit-scrollbar-track {
    background: var(--quantum-bg-light);
    border-radius: 6px;
    border: 1px solid rgba(0, 255, 255, 0.2);
}

.panel-content::-webkit-scrollbar-thumb {
    background: var(--quantum-primary);
    border-radius: 6px;
    box-shadow: 0 0 10px var(--quantum-primary);
    border: 2px solid var(--quantum-bg-light);
}

.panel-content::-webkit-scrollbar-thumb:hover {
    background: var(--quantum-secondary);
    box-shadow: 0 0 15px var(--quantum-secondary);
}

/* Control Sections */
.control-section {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.1);
}

.control-section:last-child {
    border-bottom: none;
}

.control-section h3 {
    font-size: 14px;
    color: var(--quantum-text);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: block;
    font-size: 13px;
    color: var(--quantum-text-dim);
    margin-bottom: 8px;
}

.control-group label span {
    float: right;
    color: var(--quantum-primary);
    font-weight: bold;
}

.control-group input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--quantum-bg-light);
    border-radius: 3px;
    outline: none;
    appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--quantum-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--quantum-primary);
    transition: all 0.2s ease;
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
    width: 20px;
    height: 20px;
    box-shadow: 0 0 15px var(--quantum-primary);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--quantum-primary);
    cursor: pointer;
}

.checkbox-group label {
    margin: 0;
    cursor: pointer;
}

/* Mode Buttons */
.mode-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.mode-btn {
    padding: 12px;
    background: var(--quantum-bg-light);
    border: 1px solid var(--quantum-border);
    border-radius: 8px;
    color: var(--quantum-text);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mode-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    border-color: var(--quantum-primary);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.mode-btn.active {
    background: rgba(0, 255, 255, 0.2);
    border-color: var(--quantum-primary);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
    color: var(--quantum-primary);
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.action-btn {
    padding: 12px;
    background: var(--quantum-bg-light);
    border: 1px solid var(--quantum-border);
    border-radius: 8px;
    color: var(--quantum-text);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.action-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    border-color: var(--quantum-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 255, 255, 0.3);
}

.action-btn:active {
    transform: translateY(0);
}

/* Stats Display */
.stats-display {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.stat-item {
    padding: 10px;
    background: var(--quantum-bg-light);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 6px;
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 11px;
    color: var(--quantum-text-dim);
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 18px;
    color: var(--quantum-primary);
    font-weight: bold;
    text-shadow: 0 0 10px var(--quantum-primary);
}

/* Info Panel */
.info-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 600px;
    background: rgba(26, 26, 46, 0.98);
    border: 2px solid var(--quantum-primary);
    border-radius: 16px;
    box-shadow: 0 0 40px var(--quantum-shadow);
    z-index: 2000;
    padding: 30px;
    animation: panel-fade-in 0.5s ease-out;
}

.info-panel.hidden {
    display: none;
}

.info-content h2 {
    color: var(--quantum-primary);
    text-shadow: 0 0 15px var(--quantum-primary);
    margin-bottom: 15px;
    font-size: 24px;
}

.info-content h3 {
    color: var(--quantum-secondary);
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 18px;
}

.info-content p {
    color: var(--quantum-text);
    line-height: 1.6;
    margin-bottom: 15px;
}

.info-content ul {
    list-style: none;
    margin: 15px 0;
}

.info-content ul li {
    padding: 8px 0;
    color: var(--quantum-text-dim);
    border-bottom: 1px solid rgba(0, 255, 255, 0.1);
}

.info-content ul li strong {
    color: var(--quantum-primary);
}

.info-tech {
    font-size: 12px;
    color: var(--quantum-text-dim);
    text-align: center;
    margin-top: 20px;
    font-style: italic;
}

.close-info-btn {
    display: block;
    margin: 20px auto 0;
    padding: 12px 40px;
    background: linear-gradient(45deg, var(--quantum-primary), var(--quantum-secondary));
    border: none;
    border-radius: 25px;
    color: #000;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px var(--quantum-shadow);
}

.close-info-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px var(--quantum-shadow);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 15px 20px;
    background: rgba(26, 26, 46, 0.95);
    border: 1px solid var(--quantum-primary);
    border-radius: 8px;
    color: var(--quantum-text);
    box-shadow: 0 0 20px var(--quantum-shadow);
    animation: toast-slide-in 0.3s ease-out;
    backdrop-filter: blur(10px);
}

.toast.success {
    border-color: var(--quantum-success);
    box-shadow: 0 0 20px rgba(0, 230, 118, 0.5);
}

.toast.error {
    border-color: var(--quantum-danger);
    box-shadow: 0 0 20px rgba(255, 23, 68, 0.5);
}

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

@keyframes glow-text {
    0%, 100% { text-shadow: 0 0 10px var(--quantum-primary); }
    50% { text-shadow: 0 0 20px var(--quantum-primary), 0 0 30px var(--quantum-primary); }
}

@keyframes progress {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes cursor-pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.8;
    }
}

@keyframes trail-fade {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(0.5);
    }
}

@keyframes panel-fade-in {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

@keyframes toast-slide-in {
    0% {
        opacity: 0;
        transform: translateX(100%);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .control-panel {
        width: calc(100% - 40px);
        right: 20px;
        max-height: calc(100vh - 120px);
    }

    .info-panel {
        width: calc(100% - 40px);
        padding: 20px;
    }

    /* Floating cards responsive */
    .stats-card {
        top: 70px;
        left: 10px;
        right: auto;
        min-width: 180px;
        padding: 15px;
    }

    .actions-card {
        bottom: 10px;
        left: 10px;
        right: auto;
        min-width: 200px;
        padding: 15px;
    }

    .floating-card h3 {
        font-size: 14px;
    }

    .mode-buttons,
    .action-buttons {
        grid-template-columns: 1fr;
    }

    .stats-display {
        grid-template-columns: 1fr;
    }
}

/* High Performance Optimizations */
.quantum-canvas,
.quantum-cursor,
.trail-particle {
    will-change: transform;
    transform: translateZ(0);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles */
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--quantum-primary);
    outline-offset: 2px;
}