/* ============================================
   Ohm's Law Calculator - Specific Styles
   ============================================ */

.calculator-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
    min-height: calc(100vh - 300px);
}

/* Main Calculator Panel */
.calculator-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
}

.panel-header {
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.panel-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Input Grid */
.input-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.input-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    transition: all 0.2s ease;
    position: relative;
}

.input-card:hover {
    border-color: var(--border-hover);
}

.input-card.active {
    border-color: var(--accent-engineering);
    box-shadow: 0 0 0 3px var(--accent-engineering-dim);
}

.input-card.calculated {
    background: var(--accent-engineering-dim);
    border-color: var(--accent-engineering);
}

/* Error state for infinite/invalid values */
.input-card.error {
    border-color: var(--accent-error);
    background: rgba(239, 68, 68, 0.1);
}

.input-card.error .input-symbol {
    color: var(--accent-error);
    border-color: var(--accent-error);
}

.input-card.error .input-field-wrapper input {
    color: var(--accent-error);
}

.input-card.error .input-field-wrapper input::placeholder {
    color: var(--accent-error);
    opacity: 0.7;
}

.input-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.input-label {
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-symbol {
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--accent-engineering);
}

.input-card.calculated .input-symbol {
    background: var(--accent-engineering);
    color: var(--bg-primary);
    border-color: var(--accent-engineering);
}

.input-name {
    font-weight: 600;
    color: var(--text-primary);
}

.input-unit-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.lock-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all 0.15s ease;
}

.lock-btn:hover {
    border-color: var(--accent-engineering);
    color: var(--accent-engineering);
}

.lock-btn.locked {
    background: var(--accent-engineering);
    border-color: var(--accent-engineering);
    color: var(--bg-primary);
}

.lock-btn svg {
    width: 16px;
    height: 16px;
}

.input-field-wrapper {
    display: flex;
    gap: 8px;
}

.input-field-wrapper input {
    flex: 1;
    font-size: 1.5rem;
    padding: 12px 16px;
    text-align: right;
    background: var(--bg-card);
}

.input-card.calculated .input-field-wrapper input {
    background: transparent;
    border-color: transparent;
    color: var(--accent-engineering);
    font-weight: 600;
}

.input-field-wrapper select {
    width: 100px;
    font-size: 0.875rem;
    padding: 12px;
    background: var(--bg-card);
}

.copy-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all 0.15s ease;
}

.copy-btn:hover {
    border-color: var(--accent-engineering);
    color: var(--accent-engineering);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
}

.copy-btn.copy-success {
    border-color: var(--accent-success);
    color: var(--accent-success);
    background: var(--accent-success-dim);
}

/* Results Section */
.results-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 24px;
}

.results-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.results-header h3 {
    font-size: 1rem;
    color: var(--text-primary);
}

.results-header svg {
    width: 20px;
    height: 20px;
    color: var(--accent-engineering);
}

.formula-display {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.formula-item {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.formula-item.active {
    border-color: var(--accent-engineering);
    background: var(--accent-engineering-dim);
}

.formula-left {
    color: var(--text-secondary);
}

.formula-right {
    color: var(--text-primary);
    font-weight: 500;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.sidebar-card h3 {
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-card h3 svg {
    width: 16px;
    height: 16px;
    color: var(--accent-engineering);
}

/* Power Wheel */
.power-wheel {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 16px;
}

.wheel-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: var(--accent-engineering);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--bg-primary);
}

.wheel-segment {
    position: absolute;
    width: 70px;
    height: 70px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.2s ease;
    cursor: pointer;
}

.wheel-segment:hover {
    border-color: var(--accent-engineering);
    background: var(--accent-engineering-dim);
}

.wheel-segment.active {
    border-color: var(--accent-engineering);
    background: var(--accent-engineering);
    color: var(--bg-primary);
}

.wheel-segment .symbol {
    font-size: 1.25rem;
    font-weight: 700;
}

.wheel-segment .name {
    font-size: 0.625rem;
    text-transform: uppercase;
    opacity: 0.7;
}

.wheel-segment.voltage { top: 0; left: 50%; transform: translateX(-50%); }
.wheel-segment.current { top: 50%; right: 0; transform: translateY(-50%); }
.wheel-segment.resistance { bottom: 0; left: 50%; transform: translateX(-50%); }
.wheel-segment.power { top: 50%; left: 0; transform: translateY(-50%); }

/* Formulas Reference */
.formulas-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.formula-ref {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.formula-ref .var {
    color: var(--accent-engineering);
    font-weight: 600;
}

/* Quick Values */
.quick-values {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.quick-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    padding: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s ease;
}

.quick-value:hover {
    border-color: var(--accent-engineering);
    background: var(--accent-engineering-dim);
}

.quick-value .val {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.quick-value .desc {
    color: var(--text-muted);
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .sidebar-card {
        flex: 1;
        min-width: 280px;
    }
}

@media (max-width: 640px) {
    .input-grid {
        grid-template-columns: 1fr;
    }

    .calculator-panel {
        padding: 20px;
    }

    .formula-display {
        grid-template-columns: 1fr;
    }

    .input-field-wrapper input {
        font-size: 1.25rem;
    }
}