/* Grade Calculator Styles */
.gcp-wrapper {
    --gcp-primary: #6366f1;
    --gcp-primary-dark: #4f46e5;
    --gcp-primary-light: #eef2ff;
    --gcp-accent: #ec4899;
    --gcp-success: #10b981;
    --gcp-warning: #f59e0b;
    --gcp-danger: #ef4444;
    --gcp-success-light: #d1fae5;
    --gcp-warning-light: #fef3c7;
    --gcp-danger-light: #fee2e2;
    --gcp-text: #0f172a;
    --gcp-text-light: #475569;
    --gcp-text-muted: #94a3b8;
    --gcp-border: #e2e8f0;
    --gcp-bg-soft: #f8fafc;
    --gcp-radius: 12px;
    --gcp-radius-sm: 8px;
    font-family: inherit;
    color: var(--gcp-text);
}

.gcp-wrapper * { box-sizing: border-box; }

.gcp-container { background: #fff; }

.gcp-tabs {
    display: flex;
    background: var(--gcp-bg-soft);
    border-bottom: 2px solid var(--gcp-border);
    overflow-x: auto;
    scrollbar-width: none;
}
.gcp-tabs::-webkit-scrollbar { display: none; }

.gcp-tab {
    flex: 1;
    min-width: 130px;
    background: transparent;
    border: none;
    padding: 16px 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--gcp-text-light);
    cursor: pointer;
    transition: all 0.2s;
    border-bottom: 3px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    white-space: nowrap;
    font-family: inherit;
    margin-bottom: -2px;
}
.gcp-tab:hover { color: var(--gcp-primary); background: var(--gcp-primary-light); }
.gcp-tab.active {
    color: var(--gcp-primary-dark);
    border-bottom-color: var(--gcp-primary);
    background: #fff;
    font-weight: 700;
}
.gcp-tab-icon { font-size: 18px; }

.gcp-tab-content { display: none; padding: 28px; }
.gcp-tab-content.active { display: block; animation: gcpFade 0.3s; }
@keyframes gcpFade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; } }

.gcp-section-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px dashed var(--gcp-border);
}
.gcp-section-header h3 {
    font-size: 22px;
    font-weight: 800;
    margin: 0 0 6px 0;
    background: linear-gradient(135deg, var(--gcp-primary-dark), var(--gcp-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}
.gcp-help-text { font-size: 14px; color: var(--gcp-text-light); margin: 0; }

.gcp-table-wrapper {
    background: var(--gcp-bg-soft);
    border-radius: var(--gcp-radius);
    padding: 16px;
    margin-bottom: 18px;
    border: 1px solid var(--gcp-border);
}
.gcp-table-header {
    display: grid;
    grid-template-columns: 1fr 110px 110px 40px;
    gap: 10px;
    padding: 0 6px 10px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--gcp-primary-dark);
    letter-spacing: 0.6px;
    border-bottom: 2px solid #e0e7ff;
    margin-bottom: 12px;
}
.gcp-gpa-header { grid-template-columns: 1fr 110px 110px 40px; }
.gcp-avg-header { grid-template-columns: 1fr 130px 40px; }
.gcp-optional { font-weight: 400; text-transform: none; font-size: 11px; color: var(--gcp-text-muted); font-style: italic; }

.gcp-rows { display: flex; flex-direction: column; gap: 8px; }
.gcp-row {
    display: grid;
    grid-template-columns: 1fr 110px 110px 40px;
    gap: 10px;
    align-items: center;
    padding: 4px;
}
.gcp-gpa-row { grid-template-columns: 1fr 110px 110px 40px; }
.gcp-avg-row { grid-template-columns: 1fr 130px 40px; }

.gcp-input {
    width: 100%;
    padding: 11px 13px;
    border: 2px solid var(--gcp-border);
    border-radius: var(--gcp-radius-sm);
    font-size: 14px;
    font-weight: 500;
    background: #fff;
    color: var(--gcp-text);
    transition: all 0.2s;
    font-family: inherit;
    box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}
.gcp-input:hover { border-color: #cbd5e1; }
.gcp-input:focus {
    outline: none;
    border-color: var(--gcp-primary);
    box-shadow: 0 0 0 4px rgba(99,102,241,0.15);
}
.gcp-input-large { padding: 13px 15px; font-size: 15px; font-weight: 600; }
.gcp-select {
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath fill='%236366f1' d='M3 4.5l3 3 3-3z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
    padding-right: 32px;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}
.gcp-input[type="number"]::-webkit-inner-spin-button,
.gcp-input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none; margin: 0;
}

.gcp-remove-row {
    background: #fff;
    border: 2px solid var(--gcp-border);
    color: var(--gcp-text-muted);
    width: 34px; height: 34px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s;
    margin: 0 auto;
    font-family: inherit;
    padding: 0;
}
.gcp-remove-row:hover {
    background: var(--gcp-danger);
    border-color: var(--gcp-danger);
    color: #fff;
    transform: rotate(90deg);
}

.gcp-add-row {
    background: #fff;
    border: 2px dashed var(--gcp-primary);
    color: var(--gcp-primary-dark);
    padding: 11px 18px;
    border-radius: var(--gcp-radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    margin-top: 12px;
    width: 100%;
    transition: all 0.2s;
    font-family: inherit;
}
.gcp-add-row:hover { background: var(--gcp-primary-light); border-style: solid; }
.gcp-add-row span { font-size: 16px; margin-right: 4px; }

.gcp-final-form {
    display: grid;
    gap: 18px;
    margin-bottom: 20px;
    background: var(--gcp-bg-soft);
    padding: 22px;
    border-radius: var(--gcp-radius);
    border: 1px solid var(--gcp-border);
}
.gcp-form-group { display: flex; flex-direction: column; gap: 6px; }
.gcp-form-group label { font-size: 14px; font-weight: 700; color: var(--gcp-text); }

.gcp-planning-section {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-left: 5px solid var(--gcp-warning);
    border-radius: var(--gcp-radius);
    padding: 18px;
    margin-bottom: 20px;
}
.gcp-planning-header h4 { margin: 0 0 12px 0; font-size: 15px; font-weight: 800; color: #78350f; }
.gcp-planning-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.gcp-planning-field { display: flex; flex-direction: column; gap: 6px; }
.gcp-planning-field label { font-size: 13px; font-weight: 700; color: #78350f; }

.gcp-gpa-options { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.gcp-radio-option {
    display: flex; align-items: center; gap: 8px;
    padding: 9px 16px;
    border: 2px solid var(--gcp-border);
    border-radius: var(--gcp-radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    background: #fff;
    transition: all 0.2s;
}
.gcp-radio-option:hover { border-color: var(--gcp-primary); }
.gcp-radio-option input[type="radio"] { margin: 0; accent-color: var(--gcp-primary); }

.gcp-actions { display: flex; gap: 10px; margin-bottom: 22px; flex-wrap: wrap; }
.gcp-btn {
    padding: 13px 26px;
    border-radius: var(--gcp-radius-sm);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-family: inherit;
}
.gcp-btn-primary {
    background: linear-gradient(135deg, var(--gcp-primary), var(--gcp-primary-dark));
    color: #fff;
    box-shadow: 0 4px 12px rgba(99,102,241,0.35);
    flex: 1;
    min-width: 150px;
}
.gcp-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(99,102,241,0.45); }
.gcp-btn-secondary {
    background: #fff;
    color: var(--gcp-text-light);
    border: 2px solid var(--gcp-border);
}
.gcp-btn-secondary:hover { background: var(--gcp-bg-soft); border-color: #cbd5e1; }

.gcp-result-card {
    background: linear-gradient(135deg, #fff, var(--gcp-primary-light));
    border: 2px solid var(--gcp-primary);
    border-radius: var(--gcp-radius);
    padding: 28px 24px;
    text-align: center;
    box-shadow: 0 20px 40px -10px rgba(99,102,241,0.2);
    animation: gcpSlide 0.4s;
}
@keyframes gcpSlide { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; } }

.gcp-result-main { margin-bottom: 18px; }
.gcp-result-label {
    font-size: 12px;
    color: var(--gcp-text-light);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 10px;
}
.gcp-result-value {
    font-size: 58px;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 10px;
    letter-spacing: -2px;
    background: linear-gradient(135deg, var(--gcp-primary), var(--gcp-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.gcp-result-letter {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    color: var(--gcp-text);
    background: #fff;
    padding: 7px 18px;
    border-radius: 22px;
    border: 2px solid var(--gcp-border);
}
.gcp-result-details {
    border-top: 2px dashed rgba(99,102,241,0.2);
    padding-top: 16px;
    text-align: left;
    font-size: 13px;
    color: var(--gcp-text-light);
    line-height: 1.7;
}
.gcp-result-details strong { color: var(--gcp-text); }
.gcp-result-details ul { margin: 8px 0; padding-left: 22px; }

.gcp-planning-result {
    margin-top: 14px;
    padding: 14px 18px;
    background: var(--gcp-success-light);
    border-left: 5px solid var(--gcp-success);
    border-radius: var(--gcp-radius-sm);
    font-size: 14px;
}
.gcp-planning-result.warning { background: var(--gcp-warning-light); border-left-color: var(--gcp-warning); }
.gcp-planning-result.danger { background: var(--gcp-danger-light); border-left-color: var(--gcp-danger); }

/* Grade color variants */
.gcp-result-card.grade-a { background: linear-gradient(135deg, #fff, var(--gcp-success-light)); border-color: var(--gcp-success); }
.gcp-result-card.grade-a .gcp-result-value { background: linear-gradient(135deg, var(--gcp-success), #059669); -webkit-background-clip: text; background-clip: text; }
.gcp-result-card.grade-c { background: linear-gradient(135deg, #fff, var(--gcp-warning-light)); border-color: var(--gcp-warning); }
.gcp-result-card.grade-c .gcp-result-value { background: linear-gradient(135deg, var(--gcp-warning), #d97706); -webkit-background-clip: text; background-clip: text; }
.gcp-result-card.grade-d, .gcp-result-card.grade-f { background: linear-gradient(135deg, #fff, var(--gcp-danger-light)); border-color: var(--gcp-danger); }
.gcp-result-card.grade-d .gcp-result-value, .gcp-result-card.grade-f .gcp-result-value { background: linear-gradient(135deg, var(--gcp-danger), #dc2626); -webkit-background-clip: text; background-clip: text; }

.gcp-error-message {
    background: var(--gcp-danger-light);
    border-left: 5px solid var(--gcp-danger);
    color: #991b1b;
    padding: 13px 16px;
    border-radius: var(--gcp-radius-sm);
    font-weight: 600;
    margin-bottom: 16px;
}

/* Mobile */
@media (max-width: 640px) {
    .gcp-tab-content { padding: 20px 16px; }
    .gcp-table-header { display: none; }
    .gcp-row, .gcp-gpa-row {
        grid-template-columns: 1fr 1fr 40px;
        grid-template-areas: "name name remove" "grade weight remove";
        gap: 8px;
        padding: 12px;
        background: #fff;
        border: 2px solid var(--gcp-border);
        border-radius: var(--gcp-radius-sm);
    }
    .gcp-avg-row { grid-template-areas: "name name remove" "grade grade remove"; }
    .gcp-row .gcp-name { grid-area: name; }
    .gcp-row .gcp-grade, .gcp-row .gcp-gpa-grade, .gcp-row .gcp-avg-grade { grid-area: grade; }
    .gcp-row .gcp-weight, .gcp-row .gcp-credits { grid-area: weight; }
    .gcp-row .gcp-remove-row { grid-area: remove; }
    .gcp-planning-inputs { grid-template-columns: 1fr; }
    .gcp-result-value { font-size: 44px; }
    .gcp-actions { flex-direction: column; }
    .gcp-btn { width: 100%; }
    .gcp-tab { min-width: 110px; font-size: 13px; }
    .gcp-tab-icon { display: none; }
}