/* Base styles */
:root {
    --primary: #ffffff;
    --primary-dark: #ffffff;
    --primary-light: #ffffff;
    --secondary: #ffffff;
    --accent: #ffffff;
    --dark: #000000;
    --light: #ffffff;
    --glass: rgba(0, 0, 0, 0.4);
    --glass-border: rgba(255, 255, 255, 0.2);
    /* Brighter 0.3 reduced to 0.12, now 0.2 for visibility */
    --text: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.7);
    --blur-amount: blur(20px);
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    /* Use dynamic viewport units on mobile and avoid background-attachment: fixed
       which causes viewport / address-bar related white gaps on some mobile browsers */
    background: url('background.png') no-repeat center center;
    background-attachment: fixed;
    background-size: cover;
    color: var(--text);
    min-height: 100dvh;
    overflow-x: hidden;
    line-height: 1.6;
    transition: var(--transition-smooth);
}

/* Animated Background */
.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    /* Use dynamic viewport height to avoid white gaps on mobile when address bar changes */
    height: 100dvh;
    z-index: -1;
    background-color:#000000;
    background-attachment: fixed;
    background-size: cover;
    pointer-events: none;
}

.quantum-particle,
.glow-effect {
    display: none;
}

.quantum-particle.p1 {
    width: 200px;
    height: 200px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.quantum-particle.p2 {
    width: 150px;
    height: 150px;
    top: 60%;
    left: 80%;
    animation-delay: -2s;
}

.quantum-particle.p3 {
    width: 180px;
    height: 180px;
    top: 80%;
    left: 20%;
    animation-delay: -4s;
}

.quantum-particle.p4 {
    width: 120px;
    height: 120px;
    top: 30%;
    left: 70%;
    animation-delay: -1s;
}

.quantum-particle.p5 {
    width: 160px;
    height: 160px;
    top: 70%;
    left: 40%;
    animation-delay: -3s;
}

/* Glow removed */

@keyframes float {

    0%,
    100% {
        transform: translateY(0px) scale(1);
    }

    50% {
        transform: translateY(-20px) scale(1.05);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 0.8;
    }
}

/* Glass Morphism Base */
.glass-header,
.glass-nav,
.glass-panel,
.glass-footer {
    background: var(--glass);
    backdrop-filter: var(--blur-amount);
    -webkit-backdrop-filter: var(--blur-amount);
    border: 1px solid var(--glass-border);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(255, 255, 255, 0.05),
        inset 0 0 4px 1px rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.glass-header::before,
.glass-nav::before,
.glass-panel::before,
.glass-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.3),
            /* Softened from 0.8 */
            transparent);
    z-index: 1;
}

.glass-header::after,
.glass-nav::after,
.glass-panel::after,
.glass-footer::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg,
            rgba(255, 255, 255, 0.3),
            /* Softened from 0.8 */
            transparent,
            rgba(255, 255, 255, 0.1));
    z-index: 1;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Header */
.glass-header {
    border-radius: 24px;
    padding: 30px;
    margin-bottom: 10px;
    animation: slideDown 0.8s ease-out;
}

.header-content {
    text-align: center;
}

.title-glitch {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    /* Webkit prefix */
    background-clip: text;
    /* Standard property */
    -webkit-text-fill-color: transparent;
    /* Webkit prefix for text color */
    color: transparent;
    /* Standard property for text color */
    margin-bottom: 10px;
    position: relative;
    animation: glitch 5s infinite;
}

.subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.header-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    /* Webkit prefix */
    background-clip: text;
    /* Standard property */
    -webkit-text-fill-color: transparent;
    /* Webkit prefix for text color */
    color: transparent;
    /* Standard property for text color */
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Navigation */
.glass-nav {
    border-radius: 24px;
    padding: 15px;
    margin-bottom: 10px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav-container {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Position About button on the right on desktop */
.special-nav-btn {
    position: absolute;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: #6b6b6b;
    /* Changed to grey */
    border: 1px solid rgba(109, 106, 106, 0.089);
    border-radius: 50px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-btn:hover {
    background: #7a7a7a;
    /* Changed to grey */
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(92, 88, 88, 0.199);
}

.nav-btn.active {
    background: #8a8a8a;
    /* Changed to grey */
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.884);
}

.nav-icon {
    font-size: 1.1rem;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease-out;
}

.tab-content.active {
    display: block;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 20px;
    min-height: 600px;
}

/* Glass Panels */
.glass-panel {
    border-radius: 30px;
    padding: 24px;
    animation: scaleIn 0.6s ease-out;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.panel-header h3,
.panel-header h4 {
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 600;
}

.panel-actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #6b6b6b;
    /* Changed to grey */
    border: 1px solid rgba(78, 75, 75, 0.2);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: #7a7a7a;
    /* Changed to grey */
    transform: scale(1.1);
}

/* Control Groups */
.control-group {
    margin-bottom: 24px;
}

.control-group h4 {
    color: var(--text);
    margin-bottom: 16px;
    font-size: 1rem;
    font-weight: 600;
}

/* Grid Layouts */
.potential-grid,
.operator-grid,
.barrier-grid,
.system-grid,
.gate-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.potential-btn,
.operator-btn,
.barrier-btn,
.system-btn,
.gate-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: #6b6b6b;
    /* Changed to grey */
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 0.85rem;
    text-align: left;
}

.potential-btn:hover,
.operator-btn:hover,
.barrier-btn:hover,
.system-btn:hover,
.gate-btn:hover {
    background: #7a7a7a;
    /* Changed to grey */
    transform: translateY(-1px);
}

.potential-btn.active,
.operator-btn.active,
.barrier-btn.active,
.system-btn.active,
.gate-btn.active {
    background: #8a8a8a;
    /* Changed to grey */
    color: white;
    border-color: transparent;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgb(254, 255, 254);
}

.btn-icon {
    font-size: 1rem;
}

/* Sliders */
.slider-group {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.slider-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.slider-container label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(49, 47, 47, 0.267);
    outline: none;
    appearance: none;
    /* Standard property first */
    -webkit-appearance: none;
    /* Webkit prefix for Safari/Chrome */
    -moz-appearance: none;
    /* Firefox prefix */
    transition: var(--transition-smooth);
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    /* Standard property first */
    -webkit-appearance: none;
    /* Webkit prefix */
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #cecbcb;
    /* Changed to grey */
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(116, 119, 117, 0.4);
}

/* Firefox thumb styling */
input[type="range"]::-moz-range-thumb {
    appearance: none;
    /* Standard property first */
    -moz-appearance: none;
    /* Firefox prefix */
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #8a8a8a;
    /* Changed to grey */
    cursor: pointer;
    border: none;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(112, 114, 113, 0.4);
}

input[type="range"]::-webkit-slider-thumb:hover,
input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 20px rgba(86, 88, 87, 0.6);
}

/* Firefox track styling */
input[type="range"]::-moz-range-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    height: 6px;
    border: none;
}

.slider-value {
    font-size: 0.9rem;
    color: var(--text);
    font-weight: 600;
    text-align: right;
}

/* Custom Parameters */
.custom-inputs {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.input-group input,
.glass-select {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    padding: 12px;
    color: var(--text);
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.glass-select option {
    background-color: #222222;
    color: #fff;
    padding: 10px;
}

.input-group input:focus,
.glass-select:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.15);
}

.range-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* Toggle Group */
.toggle-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toggle-item {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.toggle-item:hover {
    color: var(--text);
}

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    transition: var(--transition-smooth);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: white;
    top: 3px;
    left: 3px;
    transition: var(--transition-smooth);
}

input[type="checkbox"] {
    display: none;
}

input[type="checkbox"]:checked+.toggle-slider {
    background: #8a8a8a;
    /* Changed to grey */
}

input[type="checkbox"]:checked+.toggle-slider::before {
    transform: translateX(20px);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 24px;
}

.glass-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

.glass-btn.primary {
    background: #8a8a8a;
    /* Changed to grey */
    color: rgb(255, 255, 255);
    box-shadow: 0 4px 15px #44464427;
}

.glass-btn.primary:hover {
    background: #7a7a7a;
    /* Changed to grey */
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(67, 70, 68, 0.342);
}

.glass-btn.secondary {
    background: #7a7a7a;
    /* Changed to grey */
    color: rgb(255, 255, 255);
    box-shadow: 0 4px 15px rgba(96, 99, 97, 0.233);
}

.glass-btn.secondary:hover {
    background: #6b6b6b;
    /* Changed to grey */
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(51, 53, 52, 0.11);
}

.glass-btn.outline {
    background: transparent;
    border: 1px solid #6b6b6b;
    /* Changed to grey */
    color: var(--text-secondary);
}

.glass-btn.outline:hover {
    background: #6b6b6b;
    /* Changed to grey */
    border-color: #7a7a7a;
    /* Changed to grey */
    transform: translateY(-1px);
}

/* Visualization Grid */
.visualization-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 20px;
    height: 100%;
}

.plot-panel {
    display: flex;
    flex-direction: column;
}

.plot-container {
    flex: 1;
    min-height: 380px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.plot-info {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
}

/* Properties Panel */
.info-panel {
    grid-column: 1 / -1;
}

.properties-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.property-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.property-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-smooth);
}

.property-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.property-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: #8a8a8a;
    /* Changed to grey */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: bold;
}

.property-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.property-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.property-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
}

/* Special Displays */
.commutator-display,
.expectation-values,
.results-display {
    background: rgba(77, 78, 78, 0.1);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid rgba(77, 81, 82, 0.3);
}

.commutator-equation {
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    text-align: center;
    margin-bottom: 15px;
    color: var(--text);
}

.expectation-values,
.results-display {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.expectation-item,
.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid rgba(68, 64, 64, 0.178);
}

.expectation-item:last-child,
.result-item:last-child {
    border-bottom: none;
}

.expectation-label,
.result-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.expectation-value,
.result-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
}

/* Quantum Numbers */
.quantum-numbers {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.quantum-numbers .input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* Footer */
.glass-footer {
    border-radius: 16px;
    padding: 20px;
    margin-top: 10px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-info {
    display: flex;
    gap: 20px;
    align-items: center;
}

.app-version {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.app-status {
    font-size: 0.8rem;
    color: #4CAF50;
    background: rgba(76, 175, 80, 0.2);
    padding: 4px 12px;
    border-radius: 20px;
}

.footer-links {
    display: flex;
    gap: 12px;
}

.footer-link {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
    padding: 8px 12px;
    border-radius: 50px;
}

.footer-link:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.1);
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000000;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.5s ease-out;
}

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

.loading-content {
    text-align: center;
    animation: slideUp 0.8s ease-out;
}

.quantum-spinner {
    width: 80px;
    height: 80px;
    border: 4px solid rgba(241, 237, 237, 0.89);
    border-top: 4px solid #8a8a8a;
    /* Changed to grey */
    border-radius: 50%;
    animation: spin 1.5s linear infinite;
    margin: 0 auto 30px;
}

.loading-progress {
    margin-top: 30px;
}

.progress-bar {
    width: 300px;
    height: 6px;
    background: rgb(255, 255, 255);
    border-radius: 3px;
    overflow: hidden;
    margin: 0 auto 10px;
}

.progress-fill {
    height: 100%;
    background: #8a8a8a;
    /* Changed to grey */
    border-radius: 3px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes glitch {

    0%,
    100% {
        transform: translate(0);
    }

    20% {
        transform: translate(-2px, 2px);
    }

    40% {
        transform: translate(-2px, -2px);
    }

    60% {
        transform: translate(2px, 2px);
    }

    80% {
        transform: translate(2px, -2px);
    }
}

/* Responsive Design */
@media (max-width: 1200px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .visualization-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
        gap: 15px;
    }

    .glass-header {
        padding: 20px;
        border-radius: 20px;
    }

    .header-stats {
        gap: 20px;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .nav-container {
        gap: 8px;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }

    .nav-btn {
        padding: 10px 8px;
        font-size: 0.7rem;
        justify-content: center;
    }

    .nav-icon {
        font-size: 1rem;
    }

    /* Position About button next to Advanced on bottom row */
    .glass-nav {
        flex-wrap: wrap;
        padding: 12px;
    }

    .special-nav-btn {
        position: static;
        order: 10;
        font-size: 0.7rem;
        padding: 10px 8px;
    }

    .potential-grid,
    .operator-grid,
    .barrier-grid,
    .system-grid {
        grid-template-columns: 1fr;
    }

    .gate-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .property-grid {
        grid-template-columns: 1fr;
    }

    .range-inputs,
    .quantum-numbers {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .progress-bar {
        width: 250px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
        gap: 10px;
    }

    .glass-panel {
        padding: 20px;
        border-radius: 16px;
    }

    .title-glitch {
        font-size: 2rem;
    }

    .header-stats {
        flex-direction: column;
        gap: 15px;
    }

    .action-buttons {
        gap: 8px;
    }

    .glass-btn {
        padding: 12px 16px;
        font-size: 0.85rem;
    }

    .progress-bar {
        width: 200px;
    }

    .gate-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.856);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #8a8a8a;
    /* Changed to grey */
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #7a7a7a;
    /* Changed to grey */
}

/* Selection Styling */
::selection {
    background: rgba(90, 97, 93, 0.3);
    color: white;
}

/* Focus Outline */
button:focus-visible,
input:focus-visible {
    outline: 2px solid #8a8a8a;
    /* Changed to grey */
    outline-offset: 2px;
}

/* Light Theme */
[data-theme="light"] {
    --primary: #474948;
    --primary-dark: #5f636138;
    --primary-light: #41444338;
    --secondary: #606460c7;
    --accent: #7e8283;
    --dark: #f8f9fa;
    --light: #3d3d41;
    --glass: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(0, 0, 0, 0.12);
    --text: #3b3b3d;
    --text-secondary: rgba(0, 0, 0, 0.8);
    --text-muted: rgba(0, 0, 0, 0.6);
}

[data-theme="light"] body {
    background: #f0f0f0;
}

[data-theme="light"] .background {
    background:
        radial-gradient(circle at 20% 80%, rgba(46, 48, 47, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(59, 61, 59, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(69, 71, 70, 0.15) 0%, transparent 50%);
    background-color: #f0f0f0;
}

[data-theme="light"] .plot-container {
    background: rgba(63, 61, 61, 0.5);
}

[data-theme="light"] .glass-btn.outline {
    color: var(--text);
}

[data-theme="light"] .property-card {
    background: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .commutator-display,
[data-theme="light"] .expectation-values,
[data-theme="light"] .results-display {
    background: rgba(0, 180, 219, 0.05);
    border: 1px solid rgba(69, 71, 71, 0.2);
}

.creator-info {
    text-align: center;
    margin-top: 10px;
    padding-top: 15px;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.creator-name {
    color: var#f0f0f0;
    font-weight: 600;
}

/* Modal Styling */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: rgba(30, 30, 30, 0.85);
    /* Darker glass for readability */
    border: 1px solid var(--glass-border);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    border-radius: 20px;
    padding: 30px;
    position: relative;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    animation: fadeScale 0.4s ease-out;
    display: flex;
    flex-direction: column;
}

[data-theme="light"] .modal-content {
    background: rgba(240, 240, 240, 0.9);
    color: #333;
}

.close-modal {
    color: var(--text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: 20px;
    right: 25px;
    transition: var(--transition-smooth);
    z-index: 10;
}

.close-modal:hover,
.close-modal:focus {
    color: var(--text);
    text-decoration: none;
    cursor: pointer;
    transform: scale(1.1);
}

.modal-body {
    overflow-y: auto;
    padding-right: 15px;
    /* Space for scrollbar */
    max-height: 100%;
}

/* Modal Typography */
.modal-body h2 {
    color: var(--text);
    margin-bottom: 20px;
    font-size: 1.8rem;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--glass-border);
}

.modal-body h3 {
    color: #00b4db;
    /* Accent color for subheadings */
    margin-top: 25px;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

[data-theme="light"] .modal-body h3 {
    color: #0077b6;
}

.modal-body p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.7;
    font-size: 1rem;
}

.modal-body strong {
    color: var(--text);
}

@keyframes fadeScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}