/*  Simulation Styles */
html { scroll-behavior: smooth; }

/* Cuk Converter Simulation Styles */
:root {
    /* Light mode colors */
    --primary-color:rgb(239, 87, 67);
    --secondary-color: #2980b9;
    --accent-color: #e74c3c;
    --bg-color: #f5f9fa;
    --panel-bg: #ffffff;
    --text-color: #2c3e50;
    --border-color: #ddd;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --info-color: #3498db;
    --panel-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --chart-grid: rgba(0, 0, 0, 0.1);
    --pwm-color: #a8e6cf;
    
    /* Input specific colors for light mode */
    --input-bg: #ffffff;
    --input-text: #2c3e50;
    --input-placeholder: #7f8c8d;
    --input-border: #ddd;
    --input-focus-border: #2980b9;
    --input-focus-bg: #ffffff;
    
    /* Mobile-first responsive variables */
    --container-padding: clamp(8px, 2.5vw, 20px);
    --panel-padding: clamp(12px, 3vw, 20px);
    --gap-size: clamp(8px, 2vw, 20px);
    --border-radius: clamp(4px, 1vw, 8px);
    --font-size-base: clamp(14px, 3.5vw, 16px);
    --font-size-small: clamp(12px, 3vw, 14px);
    --font-size-large: clamp(16px, 4vw, 20px);
    --chart-height: clamp(200px, 45vh, 400px);
    --waveform-height: clamp(180px, 40vh, 350px);
}

[data-theme="dark"] {
    /* Dark mode colors */
    --primary-color: #3498db;
    --secondary-color: #5dade2;
    --accent-color: #e74c3c;
    --bg-color: #1a1a1a;
    --panel-bg: #2c2c2c;
    --text-color: #ecf0f1;
    --border-color: #555;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --info-color: #3498db;
    --panel-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --chart-grid: rgba(255, 255, 255, 0.1);
    --pwm-color: #5ad1a3;
    
    /* Input specific colors for dark mode - CRITICAL FIX */
    --input-bg: #3a3a3a;
    --input-text: #ffffff;
    --input-placeholder: #bdc3c7;
    --input-border: #555;
    --input-focus-border: #5dade2;
    --input-focus-bg: #454545;
}

.simulation-container * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

.simulation-container {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    max-width: 100vw;
    margin: 0 auto;
    padding: var(--container-padding);
    width: 100%;
    min-height: 100vh;
    overflow-x: hidden;
}

.simulation-header {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: var(--panel-padding);
    margin-bottom: var(--gap-size);
    border-radius: var(--border-radius);
    box-shadow: var(--panel-shadow);
    position: relative;
    overflow: hidden;
    min-height: clamp(80px, 20vw, 120px);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.simulation-header h1 {
    text-align: center;
    font-size: clamp(1.2rem, 5vw, 2.2rem);
    margin: 0;
    padding-right: clamp(60px, 15vw, 100px);
    line-height: 1.2;
    word-wrap: break-word;
}

.header-subtitle {
    text-align: center;
    font-size: clamp(0.8rem, 3vw, 1.1rem);
    margin-top: clamp(4px, 1vw, 8px);
    opacity: 0.9;
    line-height: 1.3;
}

.header-controls {
    position: absolute;
    top: 50%;
    right: var(--panel-padding);
    transform: translateY(-50%);
    display: flex;
    gap: clamp(4px, 1vw, 8px);
    z-index: 10;
}

.theme-toggle, .help-button {
    background: none;
    border: none;
    color: white;
    font-size: clamp(1rem, 3vw, 1.5rem);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: clamp(35px, 8vw, 40px);
    height: clamp(35px, 8vw, 40px);
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    min-width: 40px;
    min-height: 40px;
}

.theme-toggle:hover, .help-button:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gap-size);
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

.circuit-panel {
    background-color: var(--panel-bg);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    box-shadow: var(--panel-shadow);
    margin-bottom: var(--gap-size);
    width: 100%;
    overflow: hidden;
    order: 1;
}

.circuit-container {
    display: flex;
    flex-direction: column;
    gap: var(--gap-size);
    width: 100%;
    overflow-x: hidden;
}

.component-settings {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gap-size);
    width: 100%;
}

.component-card {
    padding: var(--panel-padding);
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease, transform 0.2s ease;
    width: 100%;
    overflow: hidden;
}

.component-card:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.component-card h4 {
    margin-bottom: clamp(8px, 2vw, 12px);
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: clamp(4px, 1vw, 8px);
    font-size: var(--font-size-large);
    font-weight: 600;
}

.value-input-group {
    display: flex;
    flex-direction: column;
    gap: clamp(6px, 1.5vw, 10px);
    margin-bottom: clamp(8px, 2vw, 12px);
    width: 100%;
}

/* CRITICAL FIX: Enhanced input styling for dark mode visibility */
.value-input-group input {
    width: 100%;
    padding: clamp(8px, 2vw, 12px);
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    background-color: var(--input-bg) !important;
    color: var(--input-text) !important;
    min-height: clamp(40px, 10vw, 48px);
    transition: all 0.3s ease;
}

.value-input-group input:focus {
    background-color: var(--input-focus-bg) !important;
    border-color: var(--input-focus-border);
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.value-input-group input::placeholder {
    color: var(--input-placeholder) !important;
    opacity: 1;
}

.value-input-group select {
    width: 100%;
    padding: clamp(8px, 2vw, 12px);
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    background-color: var(--input-bg) !important;
    color: var(--input-text) !important;
    min-height: clamp(40px, 10vw, 48px);
    transition: all 0.3s ease;
}

.value-input-group select:focus {
    background-color: var(--input-focus-bg) !important;
    border-color: var(--input-focus-border);
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.control-panel {
    background-color: var(--panel-bg);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    box-shadow: var(--panel-shadow);
    width: 100%;
    overflow: hidden;
    order: 2;
}

/* CRITICAL FIX: Waveform Panel Mobile Optimization */
.waveform-panel {
    background-color: var(--panel-bg);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    box-shadow: var(--panel-shadow);
    width: 100%;
    max-width: 100%;
    min-width: unset !important; /* Remove problematic min-width */
    overflow: hidden;
    order: 3;
    display: flex;
    flex-direction: column;
    gap: var(--gap-size);
}

/* CRITICAL FIX: Chart Container Mobile Optimization */
.chart-container {
    position: relative;
    height: var(--chart-height);
    width: 100%;
    max-width: 100%;
    margin-bottom: var(--gap-size);
    background-color: var(--panel-bg);
    border-radius: var(--border-radius);
    padding: clamp(8px, 2vw, 15px);
    border: 1px solid var(--border-color);
    overflow: hidden;
    touch-action: pan-x pan-y;
    display: flex;
    flex-direction: column;
}

/* Voltage Waveform Specific */
.voltage-waveform,
.voltage-chart,
.voltage-container {
    height: var(--waveform-height);
    width: 100%;
    max-width: 100%;
    min-height: clamp(140px, 30vh, 250px);
    overflow: hidden;
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, 
        rgba(26, 82, 118, 0.05) 0%, 
        rgba(26, 82, 118, 0.02) 100%);
    border-radius: var(--border-radius);
    margin-bottom: var(--gap-size);
}

/* Current Waveform Specific */
.current-waveform,
.current-chart,
.current-container {
    height: var(--waveform-height);
    width: 100%;
    max-width: 100%;
    min-height: clamp(140px, 30vh, 250px);
    overflow: hidden;
    border: 2px solid var(--info-color);
    background: linear-gradient(135deg, 
        rgba(52, 152, 219, 0.05) 0%, 
        rgba(52, 152, 219, 0.02) 100%);
    border-radius: var(--border-radius);
    margin-bottom: var(--gap-size);
}

/* Multi-Waveform Container */
.waveform-container,
.multi-waveform-container {
    width: 100%;
    max-width: 100%;
    height: clamp(280px, 60vh, 450px);
    display: grid;
    grid-template-rows: 1fr 1fr;
    gap: clamp(8px, 2vw, 12px);
    padding: clamp(8px, 2vw, 15px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--panel-bg);
    overflow: hidden;
    margin-bottom: var(--gap-size);
}

.voltage-section,
.current-section {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

.voltage-section {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: clamp(6px, 1.5vw, 10px);
}

.current-section {
    padding-top: clamp(6px, 1.5vw, 10px);
}

.chart-toolbar {
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 2vw, 12px);
    margin-bottom: clamp(8px, 2vw, 12px);
    width: 100%;
    flex-shrink: 0;
}

.chart-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(70px, 18vw, 100px), 1fr));
    gap: clamp(6px, 1.5vw, 8px);
    width: 100%;
    justify-items: center;
}

.simulation-container h2 {
    color: var(--primary-color);
    margin-bottom: clamp(10px, 2.5vw, 15px);
    font-size: clamp(1.1rem, 4vw, 1.5rem);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: clamp(4px, 1vw, 8px);
    line-height: 1.3;
}

.simulation-container h3 {
    color: var(--primary-color);
    margin: clamp(10px, 2.5vw, 15px) 0 clamp(6px, 1.5vw, 10px) 0;
    font-size: clamp(1rem, 3.5vw, 1.2rem);
    line-height: 1.3;
}

.form-group {
    margin-bottom: clamp(12px, 3vw, 18px);
    width: 100%;
}

.simulation-container label {
    display: block;
    margin-bottom: clamp(4px, 1vw, 8px);
    font-weight: 600;
    color: var(--primary-color);
    font-size: var(--font-size-base);
    line-height: 1.4;
}

/* CRITICAL FIX: All input types styled for dark mode */
.simulation-container input[type="range"], 
.simulation-container input[type="number"], 
.simulation-container select, 
.simulation-container input[type="text"],
.simulation-container input[type="email"],
.simulation-container input[type="password"],
.simulation-container textarea {
    width: 100%;
    padding: clamp(8px, 2vw, 12px);
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    background-color: var(--input-bg) !important;
    color: var(--input-text) !important;
    min-height: clamp(40px, 10vw, 48px);
    touch-action: manipulation;
    transition: all 0.3s ease;
}

.simulation-container input[type="number"]:focus,
.simulation-container select:focus, 
.simulation-container input[type="text"]:focus,
.simulation-container input[type="email"]:focus,
.simulation-container input[type="password"]:focus,
.simulation-container textarea:focus {
    background-color: var(--input-focus-bg) !important;
    border-color: var(--input-focus-border);
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.simulation-container input[type="number"]::placeholder,
.simulation-container input[type="text"]::placeholder,
.simulation-container input[type="email"]::placeholder,
.simulation-container input[type="password"]::placeholder,
.simulation-container textarea::placeholder {
    color: var(--input-placeholder) !important;
    opacity: 1;
}

.simulation-container input[type="range"] {
    -webkit-appearance: none;
    height: clamp(6px, 1.5vw, 8px);
    background: var(--border-color);
    border-radius: var(--border-radius);
    margin-top: clamp(4px, 1vw, 8px);
    cursor: pointer;
}

.simulation-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: clamp(18px, 4vw, 20px);
    height: clamp(18px, 4vw, 20px);
    background: var(--secondary-color);
    cursor: pointer;
    border-radius: 50%;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.range-with-value {
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 2vw, 12px);
    width: 100%;
}

.range-with-value input[type="number"] {
    width: 100%;
    text-align: center;
    font-weight: 600;
}

.simulation-container button {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: clamp(8px 12px, 2vw 3vw, 12px 18px);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 600;
    transition: all 0.3s;
    white-space: nowrap;
    min-height: clamp(44px, 11vw, 52px);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
}

.simulation-container button:hover {
    background-color: #2471a3;
    transform: translateY(-2px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.simulation-container button:active {
    transform: translateY(0);
    box-shadow: none;
}

.simulation-container button.primary {
    background-color: var(--primary-color);
}

.simulation-container button.primary:hover {
    background-color: #2980b9;
}

.simulation-container button.success {
    background-color: var(--success-color);
}

.simulation-container button.success:hover {
    background-color: #219a52;
}

.simulation-container button.warning {
    background-color: var(--warning-color);
}

.simulation-container button.warning:hover {
    background-color: #e67e22;
}

.simulation-container button.danger {
    background-color: var(--accent-color);
}

.simulation-container button.danger:hover {
    background-color: #c0392b;
}

.simulation-container button.active {
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.3);
    opacity: 0.9;
    background-color: var(--primary-color);
}

.button-group {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(8px, 2vw, 12px);
    margin-top: clamp(12px, 3vw, 18px);
    width: 100%;
}

.tab-container {
    margin-bottom: var(--gap-size);
    width: 100%;
    overflow: hidden;
}

.tab-header {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: clamp(12px, 3vw, 18px);
    overflow-x: auto;
    scrollbar-width: thin;
    width: 100%;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
}

.tab-button {
    padding: clamp(8px 12px, 2vw 3vw, 12px 15px);
    cursor: pointer;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-weight: 600;
    color: var(--text-color);
    opacity: 0.7;
    transition: all 0.3s;
    white-space: nowrap;
    font-size: var(--font-size-base);
    min-height: clamp(44px, 11vw, 52px);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    flex: 1;
    min-width: clamp(80px, 20vw, 120px);
    scroll-snap-align: start;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tab-button.active {
    border-bottom-color: var(--secondary-color);
    opacity: 1;
    background-color: rgba(41, 128, 185, 0.1);
}

.tab-content {
    display: none;
    width: 100%;
}

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

.axis-settings {
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 2vw, 12px);
    margin-bottom: clamp(12px, 3vw, 15px);
    padding: var(--panel-padding);
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    width: 100%;
    border: 1px solid var(--border-color);
}

.axis-group {
    display: flex;
    flex-direction: column;
    gap: clamp(4px, 1vw, 8px);
    width: 100%;
}

.axis-group label {
    font-weight: 600;
    margin-bottom: 0;
    font-size: var(--font-size-base);
    color: var(--primary-color);
}

.axis-group input {
    width: 100%;
    padding: clamp(6px, 1.5vw, 8px);
    background-color: var(--input-bg) !important;
    color: var(--input-text) !important;
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    min-height: clamp(38px, 9vw, 44px);
    text-align: center;
    transition: all 0.3s ease;
}

.axis-group input:focus {
    background-color: var(--input-focus-bg) !important;
    border-color: var(--input-focus-border);
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.axis-group input::placeholder {
    color: var(--input-placeholder) !important;
    opacity: 1;
}

.advanced-analysis {
    margin-top: var(--gap-size);
    background-color: var(--bg-color);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    width: 100%;
}

.analysis-header {
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 2vw, 12px);
    margin-bottom: clamp(12px, 3vw, 18px);
    width: 100%;
}

.analysis-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(8px, 2vw, 12px);
    margin-bottom: clamp(12px, 3vw, 18px);
    width: 100%;
}

.analysis-results {
    background-color: var(--panel-bg);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-top: clamp(12px, 3vw, 18px);
    width: 100%;
    overflow-x: auto;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    display: none;
}

.loading-spinner {
    width: clamp(40px, 10vw, 60px);
    height: clamp(40px, 10vw, 60px);
    border: clamp(4px, 1vw, 6px) solid rgba(255, 255, 255, 0.3);
    border-top: clamp(4px, 1vw, 6px) solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.tooltip {
    position: absolute;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: clamp(4px 8px, 1vw 2vw, 6px 10px);
    border-radius: var(--border-radius);
    font-size: var(--font-size-small);
    pointer-events: none;
    z-index: 1000;
    display: none;
    max-width: 90vw;
    word-wrap: break-word;
}

.simulation-status {
    padding: clamp(4px 8px, 1vw 2vw, 6px 10px);
    border-radius: var(--border-radius);
    font-weight: bold;
    display: inline-block;
    font-size: var(--font-size-base);
}

.status-idle {
    background-color: var(--border-color);
    color: var(--text-color);
}

.status-running {
    background-color: var(--info-color);
    color: white;
    animation: pulse 1.5s infinite;
}

.status-completed {
    background-color: var(--success-color);
    color: white;
}

.status-error {
    background-color: var(--accent-color);
    color: white;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

.zoom-box {
    position: absolute;
    border: 1px dashed var(--accent-color);
    background-color: rgba(231, 76, 60, 0.1);
    pointer-events: none;
    z-index: 10;
    display: none;
}

.zoom-box.active {
    display: block;
}

.simulation-container table {
    width: 100%;
    border-collapse: collapse;
    margin: clamp(8px, 2vw, 12px) 0;
    overflow-x: auto;
    display: block;
    white-space: nowrap;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.simulation-container table tbody,
.simulation-container table thead {
    display: table;
    width: 100%;
}

.simulation-container th, 
.simulation-container td {
    padding: clamp(6px 8px, 1.5vw 2vw, 8px 12px);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: var(--font-size-base);
    min-width: clamp(60px, 15vw, 80px);
    vertical-align: middle;
}

.simulation-container th {
    background-color: var(--bg-color);
    font-weight: 600;
    color: var(--primary-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.real-time-monitor {
    background-color: var(--bg-color);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-top: var(--gap-size);
    width: 100%;
}

.monitor-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gap-size);
    margin-top: clamp(12px, 3vw, 18px);
    width: 100%;
}

.monitor-item {
    background-color: var(--panel-bg);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
    width: 100%;
}

.monitor-value {
    font-size: clamp(1.1rem, 4vw, 1.5rem);
    font-weight: bold;
    color: var(--primary-color);
    margin: clamp(4px, 1vw, 8px) 0;
    word-break: break-all;
}

.monitor-label {
    font-size: var(--font-size-base);
    color: var(--text-color);
    opacity: 0.8;
}

.comparison-tool {
    background-color: var(--bg-color);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-top: var(--gap-size);
    width: 100%;
}

.comparison-controls {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(8px, 2vw, 12px);
    margin: clamp(12px, 3vw, 18px) 0;
    width: 100%;
}

.comparison-select {
    width: 100%;
}

.saved-simulations {
    margin-top: clamp(12px, 3vw, 18px);
    max-height: clamp(150px, 30vh, 200px);
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--panel-padding);
    background-color: var(--panel-bg);
    width: 100%;
    -webkit-overflow-scrolling: touch;
}

.saved-simulation-item {
    padding: clamp(6px, 1.5vw, 8px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: clamp(6px, 1.5vw, 8px);
    width: 100%;
}

.saved-simulation-item:last-child {
    border-bottom: none;
}

.saved-simulation-item button {
    width: 100%;
    padding: clamp(4px 8px, 1vw 2vw, 6px 10px);
    font-size: var(--font-size-small);
    min-height: clamp(32px, 8vw, 40px);
}

.color-theme-selector {
    margin-top: var(--gap-size);
    padding: var(--panel-padding);
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    width: 100%;
}

.theme-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(30px, 7vw, 35px), 1fr));
    gap: clamp(8px, 2vw, 12px);
    margin-top: clamp(8px, 2vw, 12px);
    justify-items: center;
    width: 100%;
}

.theme-option {
    width: clamp(25px, 6vw, 35px);
    height: clamp(25px, 6vw, 35px);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.2s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.theme-option:hover {
    transform: scale(1.1);
}

.theme-option.active {
    border-color: var(--accent-color);
}

.theme-blue {
    background: linear-gradient(135deg, #1a5276, #3498db);
}

.theme-green {
    background: linear-gradient(135deg, #196f3d, #2ecc71);
}

.theme-purple {
    background: linear-gradient(135deg, #6c3483, #9b59b6);
}

.theme-orange {
    background: linear-gradient(135deg, #ba4a00, #f39c12);
}

.theme-red {
    background: linear-gradient(135deg, #922b21, #e74c3c);
}

.operation-mode {
    display: inline-block;
    padding: clamp(3px 6px, 0.75vw 1.5vw, 4px 8px);
    border-radius: clamp(3px, 0.75vw, 4px);
    font-size: var(--font-size-base);
    font-weight: bold;
    margin-left: clamp(6px, 1.5vw, 10px);
}

.mode-ccm {
    background-color: var(--success-color);
    color: white;
}

.mode-dcm {
    background-color: var(--warning-color);
    color: white;
}

.component-stress {
    margin-top: var(--gap-size);
    background-color: var(--bg-color);
    padding: var(--panel-padding);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    width: 100%;
}

.stress-meter {
    height: clamp(8px, 2vw, 10px);
    background-color: var(--border-color);
    border-radius: var(--border-radius);
    margin: clamp(4px, 1vw, 6px) 0;
    overflow: hidden;
    width: 100%;
}

.stress-level {
    height: 100%;
    background-color: var(--success-color);
    border-radius: var(--border-radius);
    transition: width 0.5s;
}

.stress-level.warning {
    background-color: var(--warning-color);
}

.stress-level.danger {
    background-color: var(--accent-color);
}

.stress-value {
    font-size: var(--font-size-base);
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    overflow-y: auto;
    padding: var(--container-padding);
    -webkit-overflow-scrolling: touch;
}

.modal-content {
    background-color: var(--panel-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--panel-shadow);
    max-width: min(800px, 95vw);
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    padding: var(--panel-padding);
    margin: clamp(10px, 2.5vw, 20px);
    -webkit-overflow-scrolling: touch;
}

.modal-close {
    position: absolute;
    top: var(--panel-padding);
    right: var(--panel-padding);
    font-size: clamp(18px, 4vw, 24px);
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text-color);
    width: clamp(32px, 8vw, 40px);
    height: clamp(32px, 8vw, 40px);
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.modal-close:hover {
    background-color: var(--border-color);
}

.modal-title {
    margin-bottom: var(--gap-size);
    padding-bottom: clamp(8px, 2vw, 12px);
    border-bottom: 1px solid var(--border-color);
    color: var(--primary-color);
    font-size: clamp(1.2rem, 4vw, 1.5rem);
    padding-right: clamp(40px, 10vw, 50px);
}

.guide-section {
    margin-bottom: var(--gap-size);
    width: 100%;
}

.guide-section h3 {
    margin-bottom: clamp(8px, 2vw, 12px);
    color: var(--primary-color);
    font-size: var(--font-size-large);
}

.guide-section p {
    margin-bottom: clamp(8px, 2vw, 12px);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.guide-section ul {
    margin-left: clamp(16px, 4vw, 24px);
    margin-bottom: clamp(8px, 2vw, 12px);
}

.guide-section li {
    font-size: var(--font-size-base);
    margin-bottom: clamp(4px, 1vw, 6px);
}

.guide-section img {
    max-width: 100%;
    height: auto;
    margin: clamp(8px, 2vw, 12px) 0;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.export-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(8px, 2vw, 12px);
    margin-top: clamp(8px, 2vw, 12px);
    width: 100%;
}

/* Responsive Breakpoints */

/* Small Mobile (320px - 479px) */
@media (min-width: 320px) and (max-width: 479px) {
    :root {
        --chart-height: clamp(160px, 40vh, 220px);
        --waveform-height: clamp(140px, 32vh, 180px);
    }

    .component-settings {
        grid-template-columns: 1fr;
    }

    .chart-controls {
        grid-template-columns: 1fr;
    }

    .button-group {
        grid-template-columns: 1fr;
    }

    .multi-waveform-container {
        grid-template-rows: 1fr;
        height: clamp(180px, 45vh, 250px);
    }

    .current-section {
        display: none; /* Hide on very small screens to save space */
    }

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

    .value-input-group {
        flex-direction: column;
    }

    .axis-settings {
        padding: clamp(6px, 1.5vw, 10px);
    }
}

/* Large Mobile (480px - 767px) */
@media (min-width: 480px) and (max-width: 767px) {
    .component-settings {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }

    .chart-controls {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .button-group {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .monitor-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }

    .value-input-group {
        flex-direction: row;
        align-items: flex-end;
    }

    .axis-settings {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .axis-group {
        flex-direction: row;
        align-items: center;
        flex: 1;
        min-width: 0;
    }

    .axis-group input {
        max-width: clamp(60px, 15vw, 80px);
    }

    .range-with-value {
        flex-direction: row;
        align-items: center;
    }

    .range-with-value input[type="number"] {
        width: clamp(60px, 15vw, 80px);
        flex-shrink: 0;
    }

    .multi-waveform-container {
        grid-template-rows: 1fr 1fr;
        height: clamp(280px, 55vh, 400px);
    }

    .current-section {
        display: block;
    }
}

/* Tablets (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    .main-content {
        grid-template-columns: 1fr 2fr;
        grid-template-rows: auto auto;
    }

    .circuit-panel {
        grid-column: 1 / -1;
        order: 1;
    }

    .control-panel {
        grid-column: 1;
        order: 2;
    }

    .waveform-panel {
        grid-column: 2;
        order: 2;
    }

    .component-settings {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }

    .chart-controls {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .monitor-grid {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }

    .button-group {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }

    :root {
        --chart-height: clamp(280px, 55vh, 400px);
        --waveform-height: clamp(220px, 45vh, 350px);
    }
}

/* Small Desktops (1024px - 1199px) */
@media (min-width: 1024px) and (max-width: 1199px) {
    .main-content {
        grid-template-columns: minmax(300px, 1fr) 2fr;
    }

    .component-settings {
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    }

    .chart-controls {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .monitor-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }

    .button-group {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
}

/* Large Desktops (1200px and above) */
@media (min-width: 1200px) {
    .simulation-container {
        max-width: 1400px;
    }

    .main-content {
        grid-template-columns: minmax(350px, 1fr) 2.5fr;
    }

    .component-settings {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .chart-controls {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

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

    .button-group {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }

    :root {
        --chart-height: clamp(350px, 60vh, 500px);
        --waveform-height: clamp(280px, 55vh, 450px);
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .simulation-container button {
        min-height: 48px;
        min-width: 48px;
    }

    .tab-button {
        min-height: 52px;
    }

    .component-card:hover {
        transform: none;
    }

    .simulation-container button:hover {
        transform: none;
    }

    .simulation-container input[type="range"]::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }

    .theme-toggle, .help-button {
        min-width: 48px;
        min-height: 48px;
    }
}

/* Landscape Orientation for Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    :root {
        --chart-height: clamp(120px, 25vh, 180px);
        --waveform-height: clamp(100px, 22vh, 150px);
    }

    .simulation-header {
        padding: clamp(8px, 2vw, 12px);
    }

    .modal-content {
        max-height: 85vh;
    }

    .multi-waveform-container {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr;
        height: clamp(150px, 30vh, 200px);
    }
}

/* High DPI Display Support */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .simulation-container button,
    .component-card,
    .simulation-container input,
    .simulation-container select {
        border-width: 0.5px;
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }

    .loading-spinner {
        animation: none;
        border: 5px solid var(--secondary-color);
    }

    .status-running {
        animation: none;
    }
}

/* Focus improvements for keyboard navigation */
.simulation-container button:focus,
.simulation-container input:focus,
.simulation-container select:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .simulation-container {
        background: white;
        color: black;
        box-shadow: none;
    }

    .header-controls,
    .button-group,
    .chart-controls {
        display: none;
    }

    .simulation-header {
        background: #f0f0f0;
        color: black;
    }

    .chart-container {
        height: 300px;
        page-break-inside: avoid;
    }

    .component-card {
        page-break-inside: avoid;
        border: 1px solid #ccc;
    }
}