/* GST Calculator Specific Styles */

/* Navigation */
.navigation {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid hsl(var(--border-light));
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: hsl(var(--text-secondary));
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.nav-link:hover {
    color: hsl(var(--primary));
    background: hsl(var(--surface-alt));
    border-color: hsl(var(--border));
}

.nav-link.active {
    color: white;
    background: hsl(var(--primary));
    border-color: hsl(var(--primary));
}

/* Input Wrappers for Currency and Percentage */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.currency-symbol,
.percent-symbol {
    position: absolute;
    font-weight: 600;
    color: hsl(var(--text-secondary));
    z-index: 1;
    pointer-events: none;
}

.currency-symbol {
    left: var(--spacing-lg);
    font-size: var(--font-size-base);
}

.percent-symbol {
    right: var(--spacing-lg);
    font-size: var(--font-size-base);
}

.currency-input {
    padding-left: calc(var(--spacing-lg) + 1.2rem) !important;
}

.input-field:has(+ .percent-symbol) {
    padding-right: calc(var(--spacing-lg) + 1.2rem) !important;
}

/* Result Breakdown */
.result-breakdown {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-width: 160px;
}

.result-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: hsl(var(--surface-alt));
    border-radius: var(--radius-md);
    border: 1px solid hsl(var(--border-light));
    transition: var(--transition);
}

.result-item:hover {
    background: hsl(var(--surface));
    border-color: hsl(var(--primary) / 0.3);
}

.result-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: hsl(var(--primary));
    background: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--secondary)));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-value.gst-amount {
    background: linear-gradient(135deg, hsl(var(--success)), hsl(var(--secondary)));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: hsl(var(--text-secondary));
    text-align: center;
}

/* GST Rates Grid */
.gst-rates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.rate-card {
    background: hsl(var(--surface));
    border: 2px solid hsl(var(--border-light));
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.rate-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--secondary)));
    opacity: 0;
    transition: var(--transition);
}

.rate-card:hover {
    border-color: hsl(var(--primary));
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.rate-card:hover::before {
    opacity: 1;
}

.rate-card:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.rate-country {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: hsl(var(--text-secondary));
    margin-bottom: var(--spacing-xs);
}

.rate-percentage {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: hsl(var(--primary));
    margin-bottom: var(--spacing-xs);
}

.rate-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: hsl(var(--text-muted));
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.rate-card.selected {
    border-color: hsl(var(--primary));
    background: hsl(var(--primary) / 0.05);
}

.rate-card.selected::before {
    opacity: 1;
}

/* Animation for updated values */
.result-value.updated {
    animation: valueUpdate 0.4s ease-out;
}

@keyframes valueUpdate {
    0% { 
        transform: scale(1);
        opacity: 1;
    }
    50% { 
        transform: scale(1.08);
        opacity: 0.8;
    }
    100% { 
        transform: scale(1);
        opacity: 1;
    }
}

/* Responsive adjustments for GST calculator */
@media (max-width: 768px) {
    .navigation {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        text-align: center;
    }
    
    .gst-rates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .result-breakdown {
        gap: var(--spacing-sm);
    }
    
    .result-item {
        padding: var(--spacing-sm);
    }
    
    .result-value {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .gst-rates-grid {
        grid-template-columns: 1fr;
    }
    
    .currency-symbol {
        left: var(--spacing-md);
    }
    
    .percent-symbol {
        right: var(--spacing-md);
    }
    
    .currency-input {
        padding-left: calc(var(--spacing-md) + 1rem) !important;
    }
    
    .input-field:has(+ .percent-symbol) {
        padding-right: calc(var(--spacing-md) + 1rem) !important;
    }
}

/* Loading states */
.calculator-section.loading {
    opacity: 0.7;
    pointer-events: none;
}

.calculator-section.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid hsl(var(--border));
    border-top: 2px solid hsl(var(--primary));
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Accessibility improvements */
.rate-card:focus-visible {
    outline: 2px solid hsl(var(--primary));
    outline-offset: 2px;
}

.nav-link:focus-visible {
    outline: 2px solid hsl(var(--primary));
    outline-offset: 2px;
}

/* Print styles for GST calculator */
@media print {
    .navigation,
    .gst-rates-grid {
        display: none;
    }
    
    .calculator-section {
        break-inside: avoid;
        margin-bottom: var(--spacing-xl);
    }
    
    .result-value {
        -webkit-text-fill-color: initial;
        color: hsl(var(--text-primary));
    }
}