/* GPA Calculator Specific Styles */

.grading-reference {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding-bottom: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.grading-reference h3 {
    margin-bottom: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    text-align: center;
}

.grade-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 0.5rem;
}

.grade-item {
    text-align: center;

    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.grade-item:hover {
    transform: translateY(-5px);
    background: rgba(0, 0, 0, 0.5);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.3);
}

.grade-letter {
    width: 45px;
    height: 45px;
    margin: 0 auto 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 800;
    color: white;
}

.grade-points {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.grade-range {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.grade-status {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.4rem;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.grade-status.pass {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
}

.grade-status.fail {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    background: var(--glass-bg);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
}

.tab-btn:hover {
    background: rgba(139, 92, 246, 0.1);
    color: var(--color-text-primary);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--color-accent-pink), var(--color-accent-purple));
    color: white;
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Calculator Card */
.calculator-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.calculator-card h3 {
    margin-bottom: var(--spacing-sm);
}

/* Course Row */
.course-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr auto;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    align-items: center;
}

.course-input,
.credits-input,
.grade-select {
    padding: 0.75rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.course-input:focus,
.credits-input:focus,
.grade-select:focus {
    outline: none;
    border-color: var(--color-accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.grade-select option {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.remove-btn {
    width: 35px;
    height: 35px;
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 50%;
    color: #ef4444;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-btn:hover {
    background: rgba(239, 68, 68, 0.3);
    transform: scale(1.1);
}

/* Result Box */
.result-box {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.result-label {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.result-value {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-accent-pink), var(--color-accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.result-info {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Term Card */
.term-card {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.term-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.term-header h4 {
    color: var(--color-accent-purple);
}

.term-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* Input Group */
.input-group {
    margin-bottom: var(--spacing-md);
}

.input-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.input-group input:focus {
    outline: none;
    border-color: var(--color-accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .course-row {
        grid-template-columns: 1fr auto;
        gap: var(--spacing-sm);
    }

    .course-input {
        grid-column: 1 / -1;
    }

    .credits-input,
    .grade-select {
        grid-column: auto;
    }

    .remove-btn {
        grid-column: 2;
        grid-row: 2;
    }

    .term-inputs {
        grid-template-columns: 1fr;
    }

    .grade-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    .grade-item {
        padding: 0.75rem 0.5rem;
    }

    .grade-letter {
        width: 35px;
        height: 35px;
        font-size: 1rem;
        margin-bottom: 0.3rem;
    }

    .grade-points {
        font-size: 0.95rem;
        margin-bottom: 0.15rem;
    }

    .grade-range {
        font-size: 0.65rem;
        margin-bottom: 0.3rem;
    }

    .grade-status {
        font-size: 0.6rem;
        padding: 0.15rem 0.3rem;
    }

    .result-value {
        font-size: 3rem;
    }

    .grading-reference {
        padding: var(--spacing-lg);
    }

    .tab-btn {
        font-size: 0.85rem;
        padding: var(--spacing-sm);
    }
}