/* CSS Custom Properties for Theming */
:root {
    /* Dark Theme Colors */
    --bg-primary: #0e1117;
    --bg-secondary: #1a1d24;
    --bg-tertiary: #1f232c;
    --bg-elevated: #252932;
    
    --border-primary: #222733;
    --border-secondary: #2a2f3a;
    --border-tertiary: Orange;
    
    --text-primary: #ffffff;
    --text-secondary: #cfd8e3;
    --text-tertiary: Orange;
    
    /* Quantum Colors */
    --quantum-primary: #8b5cf6;
    --quantum-secondary: #06b6d4;
    --quantum-accent: #10b981;
    --quantum-warning: #f59e0b;
    --quantum-danger: #ef4444;
    
    /* Layout */
    --max-width: 1400px;
    --gap: 1.5rem;
    --radius: 12px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-quantum: 0 8px 25px rgba(139, 92, 246, 0.15);
    
    /* Transitions */
    --transition: all 0.2s ease;
    --transition-fast: all 0.1s ease;
}

/* Light Theme */
.theme-light {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-elevated: #ffffff;
    
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --border-tertiary: #94a3b8;
    
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    transition: var(--transition);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    backdrop-filter: blur(10px);
}

.header-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.header-logos {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-right: 1rem;
}

.header-logo {
    height: 60px;
    width: auto;
    object-fit: contain;
}

/* Theme-based logo visibility */
.theme-dark .logo-light,
.theme-light .logo-dark {
    display: none;
}

.theme-dark .logo-dark,
.theme-light .logo-light {
    display: block;
}

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

.sponsored-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.sponsor-logo {
    height: 48px;
    width: auto;
    object-fit: contain;
}

/* Theme-based sponsor logo visibility */
.theme-dark .sponsor-light,
.theme-light .sponsor-dark {
    display: none;
}

.theme-dark .sponsor-dark,
.theme-light .sponsor-light {
    display: block;
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--quantum-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.quantum-symbol {
    font-size: 1.8rem;
    color: var(--quantum-secondary);
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.theme-toggle:hover {
    background: var(--bg-elevated);
    border-color: var(--border-tertiary);
}

.header-center {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.kpi-chips {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.kpi-chip {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: 24px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kpi-label {
    color: var(--text-tertiary);
}


.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
    justify-content: flex-end;
}

/* Buttons */
.btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover {
    background: var(--bg-elevated);
    border-color: var(--border-tertiary);
}

.btn:focus-visible {
    outline: 2px solid var(--quantum-primary);
    outline-offset: 2px;
}

.btn.primary {
    background: var(--quantum-primary);
    border-color: var(--quantum-primary);
    color: white;
}

.btn.primary:hover {
    background: #7c3aed;
    border-color: #7c3aed;
}

.btn.secondary {
    background: var(--quantum-secondary);
    border-color: var(--quantum-secondary);
    color: white;
}

.btn.secondary:hover {
    background: #0891b2;
    border-color: #0891b2;
}

.btn.danger {
    background: var(--quantum-danger);
    border-color: var(--quantum-danger);
    color: white;
}

.btn.danger:hover {
    background: #dc2626;
    border-color: #dc2626;
}

.simulate-btn {
    background: linear-gradient(135deg, var(--quantum-primary), var(--quantum-secondary));
    border: none;
    border-radius: var(--radius-lg);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    color: white;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-quantum);
}

.simulate-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 30px rgba(139, 92, 246, 0.25);
}

.simulate-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-secondary);
    box-shadow: var(--shadow);
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
    transition: var(--transition);
}

.copy-btn:hover {
    color: var(--text-secondary);
    background: var(--bg-tertiary);
}

/* Main Container */
.main-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Results Summary */
.results-summary {
    width: 100%;
}

.probability-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.probability-row {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    gap: 1rem;
    align-items: center;
    padding: 0.5rem 0;
}

.probability-index {
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: 600;
    color: var(--quantum-primary);
    min-width: 1.5rem;
}

.probability-state {
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
    color: var(--text-secondary);
    min-width: 8rem;
}

.probability-bar-container {
    flex: 1;
    position: relative;
    height: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 0.75rem;
    overflow: hidden;
}

.probability-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--quantum-primary), var(--quantum-secondary));
    border-radius: 0.75rem;
    transition: width 1s ease-out;
    position: relative;
}

.probability-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.probability-percentage {
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 4rem;
    text-align: right;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-secondary);
    box-shadow: var(--shadow-quantum);
}

.card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-primary);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 1.5rem;
}

/* Parametrized Gates */
.unitary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.param-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
}

.param-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.75rem;
    align-items: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
}

.param-row label {
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 1.5rem;
}

.param-row select {
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: 0.5rem;
    padding: 0.5rem;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.param-value {
    font-family: 'SF Mono', Monaco, monospace;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 4rem;
    text-align: right;
}

.apply-btn {
    align-self: flex-end;
    background: var(--quantum-primary);
    border-color: var(--quantum-primary);
    color: white;
}

/* JSON Output */
.json-output {
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 1rem;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    overflow-x: auto;
    max-height: 200px;
    overflow-y: auto;
}

/* Gate Palette */
.gate-section {
    margin-bottom: 1.5rem;
}

.gate-section h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.gate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: 0.5rem;
}

.gate-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 0.75rem 0.5rem;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.gate-btn:hover {
    background: var(--quantum-primary);
    border-color: var(--quantum-primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.gate-btn.control-btn {
    background: var(--bg-elevated);
    font-size: 1rem;
}

.gate-btn.control-btn:hover {
    background: var(--quantum-secondary);
    border-color: var(--quantum-secondary);
}

.gate-btn[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: 0.5rem;
    padding: 0.5rem;
    font-size: 0.75rem;
    white-space: nowrap;
    z-index: 1000;
    box-shadow: var(--shadow);
}

/* Circuit Editor */
.circuit-display {
    background: transparent;
    margin-bottom: 1rem;
}

.quantum-circuit {
    min-height: 300px;
    background: transparent;
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

.circuit-text-input {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 1rem;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    resize: vertical;
    min-height: 200px;
}

.circuit-text-input:focus {
    outline: 2px solid var(--quantum-primary);
    outline-offset: 2px;
    border-color: var(--quantum-primary);
}

.editor-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.input-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.input-label input {
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: 0.5rem;
    padding: 0.375rem 0.5rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    width: 80px;
}

.editor-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Tabs */
.tab-navigation {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.tab-btn {
    background: none;
    border: none;
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.tab-btn.active {
    background: var(--quantum-primary);
    color: white;
}

.tab-content {
    display: none;
}

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

/* Code Output */
.code-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.code-output {
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 1rem;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    white-space: pre-wrap;
    overflow-x: auto;
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.4;
}

.simulation-output {
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 1rem;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    min-height: 200px;
    overflow: auto;
    text-align: center;
    display: flex;
    /* align-items: center; */
    justify-content: center;
}

.result-output {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    overflow: auto;
    max-height: 300px;
    text-align: center;
    display: flex;
    /* align-items: center; */
    justify-content: center;
    height: auto;
    min-height: auto;
    max-height: none;
}

#playground-diagram {
	display: flex;
	justify-content: center; /* horizontal */
	align-items: center;     /* vertical */
}
.console-output {
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 1rem;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    white-space: pre-wrap;
    overflow: auto;
    margin-bottom: 1rem;
    min-height: 150px;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding: 2rem 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.footer-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-elevated);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 350px;
    animation: toast-slide-in 0.3s ease-out;
}

.toast.success {
    border-left: 4px solid var(--quantum-accent);
}

.toast.error {
    border-left: 4px solid var(--quantum-danger);
}

.toast.info {
    border-left: 4px solid var(--quantum-secondary);
}

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

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

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .header-center {
        order: -1;
        width: 100%;
    }
    
    .kpi-chips {
        justify-content: center;
    }
    
    .main-container {
        padding: 1rem;
    }
    
    .gate-grid {
        grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
    }
    
    .tab-navigation {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .kpi-chips {
        flex-direction: column;
        width: 100%;
    }
    
    .kpi-chip {
        justify-content: space-between;
    }
    
    .code-controls,
    .editor-actions {
        flex-direction: column;
    }
    
    .probability-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        text-align: left;
    }
    
    .probability-state {
        min-width: auto;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .probability-bar {
        transition: none;
    }
    
    .probability-bar::after {
        animation: none;
    }
}

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

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-primary: #ffffff;
        --border-secondary: #ffffff;
        --text-tertiary: #ffffff;
    }
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid var(--quantum-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Additional Quantum Circuit Styles */
.Q-circuit-palette {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    border: 1px solid var(--border-secondary);
}

/* Ensure quantum circuit editor visibility */
.quantum-circuit .Q-circuit {
    background: transparent;
}

.quantum-circuit .Q-operation {
    fill: var(--text-primary);
}

.quantum-circuit .Q-wire {
    stroke: var(--border-tertiary);
}

/* Error States */
.error-state {
    color: var(--quantum-danger);
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--quantum-danger);
}

/* Success States */
.success-state {
    color: var(--quantum-accent);
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--quantum-accent);
}