/* Unit Converter Styles */

.converter-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.converter-header {
    text-align: center;
    margin-bottom: 2rem;
}

.converter-header h1 {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.converter-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Category Tabs */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.category-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-tab svg {
    width: 18px;
    height: 18px;
}

.category-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.category-tab.active {
    background: linear-gradient(135deg, rgba(88, 101, 242, 0.2) 0%, rgba(124, 58, 237, 0.2) 100%);
    border-color: var(--primary);
    color: var(--primary);
}

/* Converter Panel */
.converter-panel {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.converter-inputs {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
}

.converter-inputs .input-group {
    flex: 1;
}

.converter-inputs label {
    display: block;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-row {
    display: flex;
    gap: 0.5rem;
}

.input-row input {
    flex: 1;
    padding: 1rem;
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-light);
    font-size: 1.25rem;
    font-weight: 600;
}

.input-row input:focus {
    outline: none;
    border-color: var(--primary);
}

.input-row input[readonly] {
    background: rgba(88, 101, 242, 0.1);
    border-color: var(--primary);
}

.input-row select {
    width: 140px;
    padding: 1rem;
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-light);
    font-size: 0.95rem;
    cursor: pointer;
}

.input-row select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Swap Button */
.swap-btn {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-bottom: 0.25rem;
}

.swap-btn:hover {
    transform: rotate(180deg);
    box-shadow: 0 4px 15px rgba(88, 101, 242, 0.4);
}

.swap-btn svg {
    width: 24px;
    height: 24px;
}

/* Conversion Formula */
.conversion-formula {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--dark-bg);
    border-radius: 10px;
    text-align: center;
    color: var(--text-muted);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
}

.conversion-formula .highlight {
    color: var(--primary);
    font-weight: 600;
}

/* Quick Reference */
.quick-reference {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
}

.quick-reference h3 {
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.reference-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--dark-bg);
    border-radius: 8px;
    font-size: 0.9rem;
}

.reference-card .from {
    color: var(--text-muted);
}

.reference-card .equals {
    color: var(--text-muted);
    margin: 0 0.5rem;
}

.reference-card .to {
    color: var(--primary);
    font-weight: 600;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success);
    color: white;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .converter-container {
        padding: 1rem;
    }

    .converter-header h1 {
        font-size: 2rem;
    }

    .converter-header p {
        font-size: 1rem;
    }

    .category-tabs {
        gap: 0.4rem;
        overflow-x: auto;
        flex-wrap: wrap;
        -webkit-overflow-scrolling: touch;
    }

    .category-tab {
        padding: 0.6rem 0.9rem;
        font-size: 0.8rem;
    }

    .category-tab svg {
        width: 16px;
        height: 16px;
    }

    .converter-inputs {
        flex-direction: column;
        align-items: stretch;
    }

    .swap-btn {
        align-self: center;
        transform: rotate(90deg);
    }

    .swap-btn:hover {
        transform: rotate(270deg);
    }

    .input-row {
        flex-direction: column;
    }

    .input-row select {
        width: 100%;
    }

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

    .converter-panel {
        padding: 1.25rem;
    }
}

@media (max-width: 480px) {
    .converter-header h1 {
        font-size: 1.8rem;
    }

    .converter-header p {
        font-size: 1rem;
    }

    .converter-panel {
        padding: 1.25rem;
    }

    .category-tab {
        padding: 0.5rem 0.75rem;
        font-size: 0.75rem;
    }

    .category-tab svg {
        display: none;
    }

    .input-row input {
        font-size: 1.1rem;
        padding: 0.75rem;
    }

    .conversion-formula {
        font-size: 0.85rem;
    }
}