/**
 * Interactive Electrical Circuit Simulations Styles
 * Learning Platform - EngiSuite Analytics
 */

:root {
    --sim-bg-primary: #1a1a2e;
    --sim-bg-secondary: #16213e;
    --sim-accent-blue: #4a9eff;
    --sim-accent-green: #00ff88;
    --sim-accent-red: #ff6b6b;
    --sim-accent-yellow: #ffcc00;
    --sim-text-primary: #ffffff;
    --sim-text-secondary: #a0a0a0;
    --sim-border-color: #2a2a4e;
    --sim-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --sim-transition: all 0.3s ease;
}

/* ============================================
   MAIN SIMULATION CONTAINER
   ============================================ */
.simulation-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background: var(--sim-bg-primary);
    border-radius: 12px;
    box-shadow: var(--sim-shadow);
}

.simulation-canvas {
    width: 100%;
    height: auto;
    border-radius: 8px;
    background: var(--sim-bg-secondary);
    border: 2px solid var(--sim-border-color);
}

/* ============================================
   OHM'S LAW CALCULATOR
   ============================================ */
.ohmslaw-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 20px;
    background: var(--sim-bg-secondary);
    border-radius: 8px;
    margin-top: 15px;
}

.formula-display {
    width: 100%;
    text-align: center;
    font-size: 28px;
    font-weight: bold;
    color: var(--sim-accent-yellow);
    padding: 15px;
    background: rgba(255, 204, 0, 0.1);
    border-radius: 8px;
    margin-bottom: 10px;
}

.sliders-container {
    flex: 1;
    min-width: 280px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

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

.control-slider label {
    color: var(--sim-text-primary);
    font-weight: 500;
    display: flex;
    justify-content: space-between;
}

.control-slider .value {
    color: var(--sim-accent-blue);
    font-weight: bold;
}

.control-slider input[type="range"] {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    background: var(--sim-border-color);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}

.control-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--sim-accent-blue);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--sim-transition);
}

.control-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--sim-accent-blue);
}

.control-slider input[type="range"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.mode-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--sim-text-primary);
}

.mode-selector select {
    padding: 8px 16px;
    background: var(--sim-bg-primary);
    color: var(--sim-text-primary);
    border: 2px solid var(--sim-border-color);
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
}

.results-display {
    flex: 1;
    min-width: 250px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background: var(--sim-bg-primary);
    border-radius: 6px;
    border-left: 3px solid var(--sim-border-color);
}

.result-item .label {
    color: var(--sim-text-secondary);
}

.result-item .value {
    color: var(--sim-text-primary);
    font-weight: bold;
}

.result-item.highlight {
    border-left-color: var(--sim-accent-yellow);
    background: rgba(255, 204, 0, 0.1);
}

.result-item.highlight .value {
    color: var(--sim-accent-yellow);
    font-size: 1.2em;
}

/* ============================================
   SERIES CIRCUIT SIMULATOR
   ============================================ */
.series-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 20px;
    background: var(--sim-bg-secondary);
    border-radius: 8px;
    margin-top: 15px;
}

.circuit-tools {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tool-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--sim-bg-primary);
    color: var(--sim-text-primary);
    border: 2px solid var(--sim-border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--sim-transition);
    font-size: 14px;
}

.tool-btn:hover {
    background: var(--sim-accent-blue);
    border-color: var(--sim-accent-blue);
    transform: translateY(-2px);
}

.tool-btn span {
    font-weight: bold;
}

.circuit-stats {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    min-width: 100px;
}

.stat-label {
    color: var(--sim-text-secondary);
    font-size: 12px;
    text-transform: uppercase;
}

.stat-value {
    color: var(--sim-accent-green);
    font-size: 18px;
    font-weight: bold;
}

.kvl-feedback {
    width: 100%;
    padding: 12px;
    background: rgba(74, 158, 255, 0.1);
    border: 1px solid var(--sim-accent-blue);
    border-radius: 6px;
    color: var(--sim-accent-blue);
    font-family: monospace;
    transition: var(--sim-transition);
}

.kvl-feedback.valid {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--sim-accent-green);
    color: var(--sim-accent-green);
}

.kvl-feedback.invalid {
    background: rgba(255, 107, 107, 0.1);
    border-color: var(--sim-accent-red);
    color: var(--sim-accent-red);
}

.resistor-list {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 6px;
}

.resistor-list h4 {
    width: 100%;
    margin: 0 0 10px 0;
    color: var(--sim-text-secondary);
}

.resistor-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--sim-bg-primary);
    border-radius: 6px;
    border: 1px solid var(--sim-border-color);
}

.resistor-item input {
    width: 80px;
    padding: 6px;
    background: var(--sim-bg-secondary);
    color: var(--sim-text-primary);
    border: 1px solid var(--sim-border-color);
    border-radius: 4px;
    text-align: center;
}

.remove-btn {
    width: 24px;
    height: 24px;
    background: var(--sim-accent-red);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    transition: var(--sim-transition);
}

.remove-btn:hover {
    background: #ff4444;
    transform: scale(1.1);
}

/* ============================================
   PARALLEL CIRCUIT SIMULATOR
   ============================================ */
.parallel-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 20px;
    background: var(--sim-bg-secondary);
    border-radius: 8px;
    margin-top: 15px;
}

.parallel-tools {
    display: flex;
    gap: 10px;
}

.parallel-stats {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.branch-list {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 6px;
}

.branch-list h4 {
    width: 100%;
    margin: 0 0 10px 0;
    color: var(--sim-text-secondary);
}

.branch-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--sim-bg-primary);
    border-radius: 6px;
    border: 1px solid var(--sim-border-color);
}

.branch-item input {
    width: 80px;
    padding: 6px;
    background: var(--sim-bg-secondary);
    color: var(--sim-text-primary);
    border: 1px solid var(--sim-border-color);
    border-radius: 4px;
    text-align: center;
}

.branch-current {
    color: var(--sim-accent-yellow);
    font-size: 12px;
    font-family: monospace;
}

/* ============================================
   PHASOR DIAGRAM (AC)
   ============================================ */
.phasor-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 20px;
    background: var(--sim-bg-secondary);
    border-radius: 8px;
    margin-top: 15px;
}

.phasor-tools {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.phasor-values {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    padding: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

.value-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 100px;
}

.value-item .label {
    color: var(--sim-text-secondary);
    font-size: 12px;
    text-transform: uppercase;
}

.value-item .value {
    color: var(--sim-accent-blue);
    font-size: 16px;
    font-weight: bold;
    font-family: monospace;
}

/* ============================================
   LOGIC GATE SIMULATOR
   ============================================ */
.logic-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 20px;
    background: var(--sim-bg-secondary);
    border-radius: 8px;
    margin-top: 15px;
}

.gate-palette {
    width: 100%;
    padding: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

.gate-palette h4 {
    margin: 0 0 15px 0;
    color: var(--sim-text-secondary);
}

.gate-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.gate-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    padding: 12px 16px;
    background: var(--sim-bg-primary);
    color: var(--sim-text-primary);
    border: 2px solid var(--sim-border-color);
    border-radius: 8px;
    cursor: grab;
    transition: var(--sim-transition);
}

.gate-btn:hover {
    border-color: var(--sim-accent-blue);
    background: rgba(74, 158, 255, 0.1);
    transform: translateY(-3px);
}

.gate-btn:active {
    cursor: grabbing;
}

.gate-btn svg {
    width: 40px;
    height: 30px;
    color: var(--sim-accent-green);
}

.gate-btn span {
    font-size: 11px;
    color: var(--sim-text-secondary);
}

.logic-tools {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.truth-table-container {
    width: 100%;
    max-height: 300px;
    overflow: auto;
    display: none;
    padding: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

.truth-table-container.visible {
    display: block;
}

.truth-table {
    width: 100%;
    border-collapse: collapse;
    color: var(--sim-text-primary);
}

.truth-table th,
.truth-table td {
    padding: 10px 15px;
    text-align: center;
    border: 1px solid var(--sim-border-color);
}

.truth-table th {
    background: var(--sim-bg-primary);
    font-weight: bold;
}

.truth-table td.high {
    background: rgba(0, 255, 136, 0.2);
    color: var(--sim-accent-green);
}

.truth-table td.low {
    background: rgba(255, 107, 107, 0.2);
    color: var(--sim-accent-red);
}

.gate-properties {
    width: 100%;
    padding: 15px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

.gate-properties h4 {
    margin: 0 0 10px 0;
    color: var(--sim-accent-yellow);
}

.gate-properties label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--sim-text-primary);
    cursor: pointer;
}

.gate-properties input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--sim-accent-green);
}

/* ============================================
   HELP SYSTEM
   ============================================ */
.simulation-help-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    background: var(--sim-bg-primary);
    border: 2px solid var(--sim-border-color);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: var(--sim-transition);
    overflow: hidden;
}

.simulation-help-panel.visible {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.help-content {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.help-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: var(--sim-bg-secondary);
    border-bottom: 1px solid var(--sim-border-color);
}

.help-header h3 {
    margin: 0;
    color: var(--sim-text-primary);
}

.help-close {
    width: 32px;
    height: 32px;
    background: transparent;
    color: var(--sim-text-secondary);
    border: none;
    font-size: 24px;
    cursor: pointer;
    border-radius: 50%;
    transition: var(--sim-transition);
}

.help-close:hover {
    background: rgba(255, 107, 107, 0.2);
    color: var(--sim-accent-red);
}

.help-tabs {
    display: flex;
    gap: 5px;
    padding: 15px 20px;
    background: rgba(0, 0, 0, 0.1);
}

.help-tab {
    padding: 8px 16px;
    background: transparent;
    color: var(--sim-text-secondary);
    border: 1px solid var(--sim-border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--sim-transition);
}

.help-tab:hover,
.help-tab.active {
    background: var(--sim-accent-blue);
    color: white;
    border-color: var(--sim-accent-blue);
}

.help-body {
    padding: 20px;
    overflow-y: auto;
    max-height: 50vh;
}

.help-section {
    display: none;
}

.help-section.active {
    display: block;
}

.help-section h4 {
    margin: 0 0 15px 0;
    color: var(--sim-accent-yellow);
}

.help-section ul {
    margin: 0;
    padding-left: 20px;
}

.help-section li {
    margin-bottom: 10px;
    color: var(--sim-text-primary);
}

.help-section kbd {
    display: inline-block;
    padding: 4px 8px;
    background: var(--sim-bg-secondary);
    color: var(--sim-accent-green);
    border: 1px solid var(--sim-border-color);
    border-radius: 4px;
    font-family: monospace;
    font-size: 12px;
}

/* ============================================
   NOTIFICATIONS
   ============================================ */
.simulation-notification {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: var(--sim-accent-green);
    color: var(--sim-bg-primary);
    border-radius: 8px;
    font-weight: bold;
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.4);
    z-index: 10001;
    transition: var(--sim-transition);
}

.simulation-notification.fade-out {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
}

/* ============================================
   SIMULATION TABS (for switching between sims)
   ============================================ */
.simulation-tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    padding: 10px;
    background: var(--sim-bg-secondary);
    border-radius: 8px;
    overflow-x: auto;
}

.sim-tab {
    padding: 12px 24px;
    background: transparent;
    color: var(--sim-text-secondary);
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--sim-transition);
    font-weight: 500;
}

.sim-tab:hover {
    background: rgba(74, 158, 255, 0.1);
    color: var(--sim-text-primary);
}

.sim-tab.active {
    background: var(--sim-accent-blue);
    color: white;
    border-color: var(--sim-accent-blue);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes glow {

    0%,
    100% {
        box-shadow: 0 0 5px currentColor;
    }

    50% {
        box-shadow: 0 0 20px currentColor, 0 0 30px currentColor;
    }
}

@keyframes flow {
    0% {
        offset-distance: 0%;
    }

    100% {
        offset-distance: 100%;
    }
}

.simulation-canvas {
    animation: pulse 2s infinite;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .simulation-container {
        padding: 10px;
    }

    .ohmslaw-controls,
    .series-controls,
    .parallel-controls,
    .phasor-controls,
    .logic-controls {
        padding: 15px;
        gap: 12px;
    }

    .formula-display {
        font-size: 22px;
        padding: 12px;
    }

    .sliders-container,
    .results-display {
        min-width: 100%;
    }

    .circuit-tools,
    .parallel-tools,
    .phasor-tools,
    .logic-tools {
        width: 100%;
    }

    .tool-btn {
        flex: 1;
        justify-content: center;
        padding: 8px 12px;
        font-size: 12px;
    }

    .gate-btn {
        padding: 8px 12px;
    }

    .gate-btn svg {
        width: 30px;
        height: 22px;
    }

    .circuit-stats,
    .parallel-stats {
        width: 100%;
        justify-content: center;
    }

    .stat {
        min-width: 80px;
        padding: 8px 12px;
    }

    .stat-value {
        font-size: 14px;
    }

    .help-panel {
        width: 95%;
        max-height: 90vh;
    }
}

@media (max-width: 480px) {
    .control-slider input[type="range"] {
        height: 6px;
    }

    .control-slider input[type="range"]::-webkit-slider-thumb {
        width: 16px;
        height: 16px;
    }

    .tool-btn span {
        display: none;
    }

    .gate-btn span {
        font-size: 10px;
    }

    .truth-table th,
    .truth-table td {
        padding: 6px 8px;
        font-size: 12px;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .simulation-container {
        background: white;
        box-shadow: none;
    }

    .simulation-canvas {
        border: 1px solid #ccc;
    }

    .ohmslaw-controls,
    .series-controls,
    .parallel-controls,
    .phasor-controls,
    .logic-controls,
    .simulation-help-panel,
    .simulation-notification {
        display: none !important;
    }
}