.gpa-country-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.gpa-ctab {
    padding: 8px 16px;
    border: 2px solid var(--calc-border);
    background: var(--calc-bg);
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--calc-text-light);
    transition: all 0.2s;
}

.gpa-ctab:hover {
    border-color: var(--calc-primary);
    color: var(--calc-primary);
}

.gpa-ctab.active {
    background: var(--calc-gradient);
    color: white;
    border-color: transparent;
}

.gpa-scale-info {
    background: var(--calc-bg);
    border: 1px solid var(--calc-border);
    border-radius: 10px;
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    margin-bottom: 16px;
    font-size: 13px;
}

#gpaScaleName { font-weight: 700; color: var(--calc-primary); }
#gpaScaleDesc { color: var(--calc-text-light); }

.gpa-cumulative-row {
    margin-bottom: 20px;
}

.gpa-toggle-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--calc-text);
}

.gpa-toggle-label input { display: none; }

.gpa-toggle-switch {
    width: 44px;
    height: 24px;
    background: var(--calc-border);
    border-radius: 12px;
    position: relative;
    transition: 0.3s;
}

.gpa-toggle-switch::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: 0.3s;
}

.gpa-toggle-label input:checked + .gpa-toggle-switch {
    background: var(--calc-primary);
}

.gpa-toggle-label input:checked + .gpa-toggle-switch::after {
    left: 23px;
}

.gpa-subjects-header {
    display: grid;
    grid-template-columns: 1fr 180px 80px 40px;
    gap: 8px;
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--calc-text-light);
    letter-spacing: 0.5px;
}

.gpa-subject-row {
    display: grid;
    grid-template-columns: 1fr 180px 80px 40px;
    gap: 8px;
    margin-bottom: 8px;
    align-items: center;
}

.gpa-subject-input,
.gpa-grade-select,
.gpa-credits-input {
    padding: 10px 12px;
    border: 2px solid var(--calc-border);
    border-radius: 8px;
    font-size: 13px;
    color: var(--calc-text);
    background: var(--calc-bg);
    transition: border 0.2s;
    width: 100%;
    box-sizing: border-box;
}

.gpa-subject-input:focus,
.gpa-grade-select:focus,
.gpa-credits-input:focus {
    border-color: var(--calc-primary);
    outline: none;
}

.gpa-remove-btn {
    background: #fee2e2;
    color: #ef4444;
    border: none;
    border-radius: 8px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    transition: 0.2s;
}

.gpa-remove-btn:hover { background: #ef4444; color: white; }

.gpa-add-btn {
    background: transparent;
    border: 2px dashed var(--calc-primary);
    color: var(--calc-primary);
    border-radius: 10px;
    padding: 10px 20px;
    width: 100%;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    margin-top: 8px;
    transition: 0.2s;
}

.gpa-add-btn:hover {
    background: var(--calc-primary);
    color: white;
}

.gpa-semester-block {
    background: var(--calc-bg);
    border: 1px solid var(--calc-border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
}

.gpa-sem-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-weight: 700;
    color: var(--calc-primary);
}

.gpa-sem-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.gpa-sem-field label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--calc-text-light);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.gpa-sem-gpa,
.gpa-sem-credits {
    padding: 10px 12px;
    border: 2px solid var(--calc-border);
    border-radius: 8px;
    font-size: 14px;
    width: 100%;
    box-sizing: border-box;
    color: var(--calc-text);
    background: white;
}

.gpa-sem-gpa:focus,
.gpa-sem-credits:focus {
    border-color: var(--calc-primary);
    outline: none;
}

.gpa-result-main {
    text-align: center;
    background: var(--calc-gradient) !important;
    color: white !important;
}

.gpa-result-label {
    font-size: 13px;
    opacity: 0.85;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.gpa-result-value {
    font-size: 56px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
}

.gpa-result-grade {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.gpa-result-max {
    font-size: 13px;
    opacity: 0.75;
}

.gpa-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.gpa-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.gpa-stat-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--calc-text-light);
    letter-spacing: 0.5px;
}

.gpa-stat-val {
    font-size: 20px;
    font-weight: 700;
    color: var(--calc-primary);
}

@media (max-width: 600px) {
    .gpa-subjects-header,
    .gpa-subject-row {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
    }
    .gpa-remove-btn { grid-column: 2; justify-self: end; }
    .gpa-sem-inputs { grid-template-columns: 1fr; }
    .gpa-scale-info { flex-direction: column; gap: 4px; }
}