/* ============================================
   Unit Converter - Specific Styles
   ============================================ */

.converter-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
    min-height: calc(100vh - 300px);
}

/* Category Sidebar */
.category-sidebar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    height: fit-content;
    position: sticky;
    top: 24px;
}

.sidebar-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 8px 12px;
    margin-bottom: 8px;
}

.category-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.category-item {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.category-item:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

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

.category-icon {
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

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

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.panel-title h2 {
    font-size: 1.5rem;
}

.panel-icon {
    font-size: 1.5rem;
}

.swap-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

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

.swap-btn svg {
    width: 20px;
    height: 20px;
}

/* Conversion Area */
.conversion-area {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 24px;
    align-items: end;
    margin-bottom: 32px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.input-group input {
    font-size: 1.5rem;
    padding: 16px 20px;
    text-align: right;
}

.input-group select {
    font-size: 0.875rem;
}

.arrow-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: 28px;
    color: var(--text-muted);
}

.arrow-divider svg {
    width: 32px;
    height: 32px;
}

/* Result Display */
.result-display {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px 24px;
    margin-bottom: 32px;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.result-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.copy-result-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    padding: 6px 10px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

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

.copy-result-btn svg {
    width: 14px;
    height: 14px;
}

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

.result-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-engineering);
    word-break: break-word;
}

.result-formula {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.result-note {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--accent-warning);
    margin-top: 12px;
    padding-top: 12px;
}

/* Quick Reference Table */
.quick-reference {
    margin-top: 32px;
}

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

.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
}

.reference-item {
    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;
    display: flex;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.15s ease;
}

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

.reference-item .from {
    color: var(--text-secondary);
}

.reference-item .to {
    color: var(--text-primary);
}

/* Mobile Responsive */
@media (max-width: 900px) {
    .converter-layout {
        grid-template-columns: 1fr;
    }

    .category-sidebar {
        position: relative;
        top: 0;
    }

    .category-list {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 4px;
    }

    .category-item {
        padding: 8px 12px;
        font-size: 0.75rem;
    }

    .conversion-area {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .arrow-divider {
        padding: 0;
        transform: rotate(90deg);
    }

    .input-group input {
        font-size: 1.25rem;
        text-align: left;
    }

    .result-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .converter-panel {
        padding: 20px;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .copy-result-btn {
        padding: 5px 8px;
        font-size: 0.6875rem;
    }

    .copy-result-btn svg {
        width: 12px;
        height: 12px;
    }
}