/* Series and Parallel Circuits Visualization Styles */

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-red: #ef4444;
    --accent-green: #22c55e;
    --accent-yellow: #f59e0b;
    --accent-purple: #8b5cf6;
    --border-color: #475569;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a2332 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.circuits-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 25px 20px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--shadow-color);
    border: 1px solid var(--border-color);
}

header h1 {
    font-size: 2.2em;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1em;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Mode Toggle Section */
.mode-toggle-section {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 25px;
}

.mode-btn {
    padding: 12px 30px;
    font-size: 1em;
    font-weight: 600;
    border: 2px solid var(--accent-blue);
    border-radius: 8px;
    background: transparent;
    color: var(--accent-blue);
    cursor: pointer;
    transition: all 0.3s ease;
}

.mode-btn:hover {
    background: var(--accent-blue);
    color: white;
    transform: translateY(-2px);
}

.mode-btn.active {
    background: var(--accent-blue);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Main Layout */
main {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.visualization-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 25px;
}

@media (max-width: 1200px) {
    .visualization-layout {
        grid-template-columns: 1fr;
    }
}

/* Panel Styles */
.circuit-panel,
.analysis-panel {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.circuit-display,
.component-display,
.chart-display,
.formulas-display {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.circuit-display h3,
.component-display h3,
.chart-display h3,
.formulas-display h3 {
    margin-bottom: 15px;
    font-size: 1.1em;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 8px;
}

/* Canvas Styles */
#circuitCanvas,
#currentChart,
#powerChart {
    width: 100%;
    height: 300px;
    border-radius: 8px;
    background: var(--bg-tertiary);
}

/* Circuit Info */
.circuit-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 15px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 0.9em;
}

.info-item span:first-child {
    color: var(--text-secondary);
}

.info-item span:last-child {
    font-weight: 600;
    color: var(--accent-blue);
}

/* Component List */
.component-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.component-item {
    background: var(--bg-tertiary);
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid var(--accent-blue);
}

.component-header {
    margin-bottom: 10px;
}

.component-name {
    font-weight: 600;
    color: var(--accent-blue);
    font-size: 1em;
}

.component-values {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.value-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.85em;
}

.value-label {
    color: var(--text-secondary);
}

.value-value {
    font-weight: 600;
    color: var(--accent-green);
}

/* Chart Legend */
.chart-legend {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85em;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

/* Formulas Display */
.formula-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.formula-item {
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    border-left: 3px solid var(--accent-purple);
}

/* Controls Panel */
.controls-panel {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.controls-panel h3 {
    margin-bottom: 20px;
    font-size: 1.2em;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.control-group h4 {
    font-size: 0.95em;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.control-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85em;
    color: var(--text-secondary);
}

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

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    border: none;
}

.checkbox-input {
    width: auto !important;
    height: 18px !important;
    cursor: pointer;
}

/* Preset Buttons */
.preset-btn {
    padding: 8px 12px;
    font-size: 0.85em;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* Button Group */
.button-group {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 10px;
}

.control-button {
    padding: 10px 25px;
    font-size: 0.95em;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.control-button.start {
    background: var(--accent-green);
    color: white;
}

.control-button.start:hover {
    background: #16a34a;
    transform: translateY(-2px);
}

.control-button.pause {
    background: var(--accent-yellow);
    color: white;
}

.control-button.pause:hover {
    background: #d97706;
    transform: translateY(-2px);
}

.control-button.reset {
    background: var(--accent-red);
    color: white;
}

.control-button.reset:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

/* Explanation Section */
.explanation {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.explanation h2 {
    font-size: 1.8em;
    margin-bottom: 20px;
    color: var(--accent-blue);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.explanation h3 {
    font-size: 1.3em;
    margin-top: 25px;
    margin-bottom: 15px;
    color: var(--accent-purple);
}

.explanation p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .circuits-container {
        padding: 15px;
    }

    header h1 {
        font-size: 1.8em;
    }

    .mode-toggle-section {
        flex-direction: column;
        gap: 10px;
    }

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

    .button-group {
        flex-direction: column;
    }
}