/* ===== Grade Calculator Specific Styles ===== */
#grade-calculator {
    /* Scope all grade-specific styles under this root */
}

/* Calculator Hero Section */
.calculator-hero {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(247, 250, 252, 0.95) 100%);
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid var(--border-light);
}

.calculator-hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.calculator-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-coral) 0%, #dc2626 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.calculator-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Calculator Main Section */
.calculator-main {
    padding: var(--spacing-xl) 0;
    background: var(--background-gray);
}

.calculator-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2xl);
    max-width: 800px;
    margin: 0 auto;
}

.calculator-panel {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    width: 100%;
    max-width: 600px;
}

/* Mode Sections */
.mode-section {
    display: none;
}

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

/* Assignments Container */
.assignments-container {
    margin: var(--spacing-lg) 0;
}

.assignments-container h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 600;
}

.assignment-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.assignment-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: var(--spacing-sm);
    align-items: center;
}

.assignment-name {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
}

.assignment-score,
.assignment-weight {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
}

.remove-assignment,
.remove-category {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-light);
    background: white;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.remove-assignment:hover,
.remove-category:hover {
    background: var(--error-red);
    color: white;
    border-color: var(--error-red);
}

.add-assignment-btn,
.add-category-btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-gray);
    border: 2px dashed var(--border-light);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.add-assignment-btn:hover,
.add-category-btn:hover {
    background: white;
    border-color: var(--primary-coral);
    color: var(--primary-coral);
}

/* Categories Container */
.categories-container {
    margin: var(--spacing-lg) 0;
}

.categories-container h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 600;
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.category-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: var(--spacing-sm);
    align-items: center;
}

.category-name,
.category-grade,
.category-weight {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
}

/* Grading Scale Selector */
.grading-scale-selector {
    margin-bottom: var(--spacing-lg);
}

.grading-scale-selector label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.grading-scale-selector select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    background: white;
    cursor: pointer;
}

/* Results Panel */
.results-panel {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    width: 100%;
    max-width: 600px;
}

.result-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.result-header h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin: 0;
}

/* Grade Display */
.grade-display {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.grade-value {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.grade-letter {
    font-size: 2rem;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    display: inline-block;
}

/* Grade Categories */
.grade-letter.excellent {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.grade-letter.good {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
}

.grade-letter.satisfactory {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.grade-letter.passing {
    background: linear-gradient(135deg, #fb923c, #f97316);
    color: white;
}

.grade-letter.failing {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

/* Grade Chart */
.grade-chart {
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.grade-scale {
    display: flex;
    border-radius: var(--border-radius);
    overflow: hidden;
    height: 60px;
    position: relative;
}

.scale-segment {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    position: relative;
}

.scale-segment.excellent {
    background: linear-gradient(135deg, #10b981, #059669);
}

.scale-segment.good {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.scale-segment.satisfactory {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.scale-segment.passing {
    background: linear-gradient(135deg, #fb923c, #f97316);
}

.scale-segment.failing {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.scale-label {
    font-weight: 600;
    color: white;
    font-size: 1.1rem;
}

.scale-range {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
}

.grade-indicator {
    position: absolute;
    top: -10px;
    width: 4px;
    height: 80px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: left 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.grade-indicator::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid var(--text-primary);
}

/* Grade Recommendations */
.grade-recommendations {
    background: var(--background-gray);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.grade-recommendations h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.grade-recommendations ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.grade-recommendations li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
}

.grade-recommendations li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-coral);
    font-weight: bold;
}

/* Result Details */
.result-details {
    background: var(--background-gray);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.result-details h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--text-secondary);
}

.detail-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-title {
        font-size: 2rem;
    }
    
    .calculator-subtitle {
        font-size: 1rem;
    }
    
    .assignment-row,
    .category-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .remove-assignment,
    .remove-category {
        width: 100%;
        margin-top: var(--spacing-xs);
    }
    
    .grade-value {
        font-size: 2.5rem;
    }
    
    .grade-letter {
        font-size: 1.5rem;
    }
    
    .scale-segment {
        padding: var(--spacing-xs);
    }
    
    .scale-label {
        font-size: 0.9rem;
    }
    
    .scale-range {
        display: none;
    }
}