/* ==================== GRADE CALCULATOR - COMPLETE STYLES ==================== */
/* These styles match the exact HTML structure of your grade calculator */
/* Uses the same theme as your Average Calculator for consistency */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');

/* ==================== MAIN CONTAINER ==================== */
.grade-calculator-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.grade-calculator-wrapper {
    max-width: 950px;
    margin: 0 auto;
}

/* ==================== HEADER SECTION ==================== */
.grade-calculator-title {
    font-size: 3rem;
    font-weight: 800;
    font-family: 'Poppins', sans-serif;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--text);
    letter-spacing: -0.02em;
}

.grade-calculator-icon {
    font-size: 2.8rem;
    display: inline-block;
    animation: float 3s infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.grade-calculator-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    font-family: 'Poppins', sans-serif;
}

/* ==================== MAIN CARD ==================== */
.grade-calculator-card {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 2rem;
    box-shadow: var(--shadow);
}

/* ==================== CALCULATION TYPES ==================== */
.grade-calculation-types {
    margin: 0 0 1.5rem 0;
    padding: 1.2rem;
    background: var(--bg);
    border-radius: 16px;
    border: 1px solid var(--border);
}

.grade-type-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text);
    font-size: 0.9rem;
}

.grade-type-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.grade-type-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Poppins', sans-serif;
    font-size: 0.85rem;
}

.grade-type-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.grade-type-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* ==================== INPUT SECTIONS ==================== */
.grade-input-section {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.grade-input-card {
    background: var(--bg);
    border-radius: 16px;
    padding: 1.2rem;
    border: 1px solid var(--border);
    margin-bottom: 1.2rem;
}

.grade-input-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-size: 0.9rem;
}

.grade-input-field {
    width: 100%;
    padding: 0.8rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s;
    resize: vertical;
}

.grade-input-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.grade-input-hint {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

/* ==================== CATEGORY ROWS ==================== */
.grade-category-row,
.grade-course-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr auto;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
    align-items: center;
}

.grade-category-row input,
.grade-course-row input,
.grade-course-row select {
    padding: 0.6rem 0.8rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: 'Poppins', sans-serif;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.grade-category-row input:focus,
.grade-course-row input:focus,
.grade-course-row select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.grade-category-row .grade-category-name,
.grade-course-row .grade-course-name {
    min-width: 100px;
}

.grade-remove-category,
.grade-remove-course {
    background: transparent;
    border: none;
    color: var(--error);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    transition: all 0.3s;
}

.grade-remove-category:hover,
.grade-remove-course:hover {
    background: var(--error);
    color: white;
}

.grade-add-category-btn {
    background: transparent;
    border: 1px dashed var(--border);
    color: var(--text);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s;
    width: 100%;
    margin-top: 0.5rem;
}

.grade-add-category-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

/* ==================== BUTTON STYLES ==================== */
.grade-primary-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Poppins', sans-serif;
}

.grade-primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

.grade-action-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Poppins', sans-serif;
}

.grade-action-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.grade-quick-btn {
    padding: 0.5rem 1.2rem;
    font-size: 0.85rem;
}

.grade-quick-btn:active {
    transform: scale(0.95);
}

/* ==================== ACTION BUTTONS CONTAINER ==================== */
.grade-calculator-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1.5rem 0;
}

/* ==================== RESULTS SECTION ==================== */
.grade-calculator-results {
    background: var(--bg);
    border-radius: 20px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    animation: fadeIn 0.3s ease;
}

.grade-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.grade-result-label {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text);
}

.grade-result-timestamp {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ==================== MAIN RESULT DISPLAY ==================== */
.grade-main-display {
    background: linear-gradient(135deg, var(--primary), #818cf8);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    margin-bottom: 1.5rem;
    color: white;
}

.grade-main-value {
    font-size: 2rem;
    font-weight: 700;
}

.grade-main-detail {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-top: 0.5rem;
}

/* ==================== RESULT GRID ==================== */
.grade-result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.grade-result-card {
    background: var(--surface);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.grade-result-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.1);
}

.grade-result-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.grade-result-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
}

.grade-result-label-small {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.3rem;
}

/* ==================== SOLUTION SECTION ==================== */
.grade-solution-section {
    background: var(--surface);
    border-radius: 12px;
    padding: 1.2rem;
    margin: 1rem 0;
    border: 1px solid var(--border);
}

.grade-solution-title {
    color: var(--primary);
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

.grade-solution-content {
    font-size: 0.9rem;
    line-height: 1.6;
}

.grade-solution-content p {
    margin: 0.3rem 0;
}

.grade-solution-content strong {
    color: var(--text);
}

/* ==================== GRADE SCALE REFERENCE ==================== */
.grade-reference-section {
    background: var(--surface);
    border-radius: 12px;
    padding: 1.2rem;
    margin: 1rem 0;
    border: 1px solid var(--border);
}

.grade-scale-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.5rem;
    margin-top: 0.8rem;
}

.grade-scale-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.8rem;
    background: var(--bg);
    border-radius: 8px;
    font-size: 0.85rem;
}

.grade-scale-letter {
    font-weight: 700;
    color: var(--primary);
    min-width: 30px;
}

.grade-scale-range {
    color: var(--text);
}

.grade-scale-gpa {
    color: var(--text-light);
    font-weight: 500;
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.grade-primary-btn:active {
    animation: pulse 0.2s ease;
}

/* ==================== QUICK EXAMPLES ==================== */
.grade-quick-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    align-items: center;
    margin-top: 1rem;
}

/* ==================== FOOTER NOTE ==================== */
.grade-footer-note {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-light);
}

.grade-footer-note p {
    margin: 0.3rem 0;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 968px) {
    .grade-calculator-container {
        padding: 0 1rem;
    }
    
    .grade-calculator-title {
        font-size: 2.2rem;
    }
    
    .grade-calculator-icon {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .grade-calculator-card {
        padding: 1.2rem;
    }
    
    .grade-type-buttons {
        flex-direction: column;
    }
    
    .grade-type-btn {
        width: 100%;
    }
    
    .grade-result-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grade-calculator-actions {
        justify-content: center;
    }
    
    .grade-action-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.8rem;
    }
    
    .grade-primary-btn {
        padding: 0.6rem 1.5rem;
    }
    
    .grade-category-row,
    .grade-course-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .grade-scale-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .grade-calculator-title {
        font-size: 1.5rem;
    }
    
    .grade-result-grid {
        grid-template-columns: 1fr;
    }
    
    .grade-main-value {
        font-size: 1.5rem;
    }
    
    .grade-scale-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.grade-input-field:focus-visible,
.grade-primary-btn:focus-visible,
.grade-action-btn:focus-visible,
.grade-type-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ==================== SCROLLBAR STYLING ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ==================== PRINT STYLES ==================== */
@media print {
    .grade-calculator-container {
        margin: 0;
        padding: 0;
    }
    
    .grade-primary-btn,
    .grade-action-btn,
    .grade-quick-btn,
    .grade-type-btn,
    .grade-add-category-btn,
    .grade-remove-category,
    .grade-remove-course {
        display: none !important;
    }
    
    .grade-calculator-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .grade-input-field {
        border: 1px solid #ddd;
        background: white;
        color: black;
    }
}