/* Semester Card Styles */
.semesters-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.semester-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    animation: fadeIn 0.4s ease-out;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .semester-card {
    background: #ffffff;
}

.semester-card:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
    border-color: var(--primary-light);
}

.semester-header {
    padding: 1.25rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    cursor: pointer;
    user-select: none;
}

.semester-title-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.semester-icon {
    display: none;
}

.semester-name-input {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    width: auto;
    max-width: 200px;
    padding: 4px 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.semester-name-input:hover {
    background: rgba(var(--primary-rgb), 0.05);
}

.semester-name-input:focus {
    background: var(--card-bg);
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-light);
}

.semester-summary {
    display: flex;
    gap: 1.5rem;
    font-size: 0.95rem;
    color: var(--text-dim);
}

.semester-summary span b {
    color: var(--primary);
    font-weight: 700;
}

.semester-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 8px;
    border-radius: 12px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
}

.btn-icon.delete:hover {
    background: rgba(244, 63, 94, 0.1);
    color: var(--accent);
}

.semester-content {
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.semester-card.collapsed .semester-content {
    display: none;
}

.semester-card.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.toggle-icon {
    transition: transform 0.3s ease;
    color: var(--text-dim);
}

/* Config Toggle Button Style */
.btn-config-toggle {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 1.5rem;
    transition: all 0.2s;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

[data-theme="light"] .btn-config-toggle {
    background: #ffffff;
}

.btn-config-toggle:hover {
    border-color: var(--primary-light);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.btn-config-toggle.active {
    border-color: var(--primary-light);
    background: rgba(var(--primary-rgb), 0.05);
}

.btn-config-toggle svg {
    transition: transform 0.3s;
    color: var(--primary);
}

.btn-config-toggle.active svg {
    transform: rotate(180deg);
}

/* Add Semester Button */
.btn-add-semester {
    width: 100%;
    padding: 1rem;
    background: var(--card-bg);
    border: 2px dashed var(--primary-light);
    color: var(--primary);
    border-radius: 20px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    margin: 1.5rem 0 2.5rem 0;
}

[data-theme="light"] .btn-add-semester {
    background: #ffffff;
}

.btn-add-semester:hover {
    background: var(--primary-light);
    border-style: solid;
    border-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}

/* Cumulative Summary Card */
.cumulative-summary-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 28px;
    border: 1px solid var(--glass-border);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 2rem;
    margin-top: 2.5rem;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

[data-theme="light"] .cumulative-summary-card {
    background: #ffffff;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.06);
}

.cumulative-summary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient);
}

.summary-item {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.summary-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-dim);
    font-weight: 700;
}

.summary-value {
    font-size: 2.2rem;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
    color: var(--primary);
}

.cumulative-gpa-large {
    grid-column: 1 / -1;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 2rem;
    margin-bottom: 0.5rem;
}

.cumulative-gpa-large .summary-value {
    font-size: 5rem;
    color: var(--primary);
}

/* Responsive / Mobile Adjustments */
@media (max-width: 768px) {
    .semester-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1.25rem;
    }

    .semester-title-group {
        width: 100%;
        justify-content: space-between;
    }

    .semester-summary {
        width: 100%;
        justify-content: space-between;
        gap: 0.5rem;
        padding-top: 0.5rem;
        border-top: 1px solid var(--glass-border);
    }

    .semester-summary span {
        font-size: 0.85rem;
    }

    .semester-name-input {
        font-size: 1.1rem;
        max-width: 160px;
    }

    .cumulative-summary-card {
        padding: 1.5rem;
        gap: 1.5rem;
        grid-template-columns: 1fr 1fr;
    }

    .cumulative-gpa-large .summary-value {
        font-size: 4rem;
    }

    .summary-value {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .cumulative-summary-card {
        grid-template-columns: 1fr;
    }
    
    .cumulative-gpa-large .summary-value {
        font-size: 3.5rem;
    }
    
    .semester-summary {
        flex-wrap: wrap;
    }
}

/* Dark Mode Specific Polish */
[data-theme="dark"] .semester-card {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
}
[data-theme="dark"] .cumulative-summary-card {
    background: rgba(30, 41, 59, 0.8);
}
[data-theme="dark"] .summary-value {
    color: #38bdf8; /* Brighter blue for dark mode */
}

/* Semester Footer */
.semester-footer {
    padding: 0 1.5rem 1.5rem 1.5rem;
    display: flex;
    justify-content: center;
}

.semester-footer .btn-secondary {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
}