/* ========================================
   Geometry Calculator Styles
   計算器: 幾何圖形計算器
   ======================================== */

/* Shape Category Selection */
.shape-categories {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.category-btn {
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
}

.category-btn i {
    font-size: 1.5rem;
    color: #667eea;
}

.category-btn:hover {
    border-color: #667eea;
    background: linear-gradient(135deg, #f0f4ff 0%, #e8edff 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.category-btn.active {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.category-btn.active i {
    color: white;
}

/* Shape Cards Grid */
.shape-cards-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 1rem;
}

.shape-card {
    padding: 1.5rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    text-align: center;
}

.shape-card i {
    font-size: 2.5rem;
    color: #667eea;
    transition: all 0.3s ease;
}

.shape-card span {
    font-weight: 600;
    font-size: 0.9rem;
    color: #2d3748;
}

.shape-card:hover {
    border-color: #667eea;
    background: linear-gradient(135deg, #f0f4ff 0%, #e8edff 100%);
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.25);
}

.shape-card:hover i {
    transform: scale(1.1);
    color: #764ba2;
}

.shape-card.active {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.shape-card.active i {
    color: white;
}

.shape-card.active span {
    color: white;
}

/* Dynamic Input Fields */
#dynamicInputs {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.input-group-custom {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group-custom label {
    font-weight: 600;
    color: #2d3748;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-group-custom label i {
    color: #667eea;
    cursor: help;
}

.input-group-custom .form-input {
    width: 100%;
}
.form-input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #48bb78;
    border-radius: 12px;
    font-family: 'Roboto Mono', monospace;
    font-size: 1.1rem;
    background: #f0fff4;
    transition: all 0.3s ease;
}
/* Shape Visualization */
.shape-visualization {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8faff 0%, #f0f4ff 100%);
    border-radius: 12px;
    padding: 1rem;
}

#shapeCanvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

#visualizationPlaceholder {
    position: absolute;
    font-size: 1.1rem;
    color: #a0aec0;
    font-weight: 500;
}

/* Results Display */
#resultsContent {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
    border-radius: 8px;
    border-left: 4px solid #48bb78;
}

.result-item-label {
    font-weight: 600;
    color: #2d3748;
    font-size: 0.95rem;
}

.result-item-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: #667eea;
    font-family: 'Courier New', monospace;
}

.result-item-value .unit {
    font-size: 0.85rem;
    color: #718096;
    margin-left: 0.25rem;
}

/* Formula Display */
#formulaContent {
    margin-top: 1rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #fffaf0 0%, #fff5e6 100%);
    border-radius: 8px;
    border-left: 4px solid #f59e0b;
}

.formula-item {
    margin-bottom: 1rem;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: #2d3748;
    line-height: 1.8;
}

.formula-item:last-child {
    margin-bottom: 0;
}

.formula-item strong {
    color: #667eea;
    font-weight: 700;
}

/* Message Alerts */
.message-alert {
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.message-alert i {
    font-size: 1.25rem;
}

.message-alert.warning {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    color: #856404;
}

.message-alert.error {
    background: #f8d7da;
    border-left: 4px solid #dc3545;
    color: #721c24;
}

.message-alert.success {
    background: #d4edda;
    border-left: 4px solid #28a745;
    color: #155724;
}

.message-alert.info {
    background: #d1ecf1;
    border-left: 4px solid #17a2b8;
    color: #0c5460;
}

/* Unit Selector */
.unit-selector {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-top: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f0fff4 0%, #e6fffa 100%);
    border-radius: 8px;
}

.unit-selector label {
    font-weight: 600;
    color: #2d3748;
    font-size: 0.9rem;
}

.unit-selector select {
    flex: 1;
    padding: 0.5rem;
    border: 2px solid #48bb78;
    border-radius: 6px;
    font-size: 0.9rem;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.unit-selector select:hover {
    border-color: #38a169;
}

.unit-selector select:focus {
    outline: none;
    border-color: #2f855a;
    box-shadow: 0 0 0 3px rgba(72, 187, 120, 0.1);
}

/* Action Buttons Grid */
.action-buttons-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* Action Buttons */
.btn-custom,
.btn-custom-outline {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: none;
}

.btn-custom {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-custom-outline {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-custom-outline:hover {
    background: linear-gradient(135deg, #f0f4ff 0%, #e8edff 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.btn-custom:active,
.btn-custom-outline:active {
    transform: translateY(0);
}

/* Sponsor Button */
.btn-sponsor {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: none;
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
    color: white;
}

.btn-sponsor:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-sponsor:active {
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 992px) {
    .shape-cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .shape-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .shape-visualization {
        min-height: 300px;
    }

    #shapeCanvas {
        width: 100%;
        height: auto;
    }
}

@media (max-width: 576px) {
    .shape-categories {
        grid-template-columns: 1fr;
    }

    .shape-cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .shape-card {
        padding: 1rem 0.5rem;
    }

    .shape-card i {
        font-size: 2rem;
    }

    .shape-card span {
        font-size: 0.85rem;
    }

    .action-buttons-grid {
        grid-template-columns: 1fr;
    }

    .shape-visualization {
        min-height: 250px;
    }
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Tooltip Styling */
.tooltip-icon {
    cursor: help;
    color: #a0aec0;
    transition: color 0.2s ease;
}

.tooltip-icon:hover {
    color: #667eea;
}

/* Calculation Steps Styling */
#stepsContent {
    margin-top: 1rem;
}

.calculation-step {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-left: 4px solid #667eea;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.calculation-step:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.step-number {
    font-size: 1.1rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.step-formula,
.step-calculation,
.step-intermediate,
.step-result {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    line-height: 1.6;
}

.step-formula {
    color: #2d3748;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
}

.step-calculation {
    color: #4a5568;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
}

.step-intermediate {
    color: #718096;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    padding-left: 2rem;
}

.step-result {
    color: #2d3748;
    font-size: 1rem;
}

.step-result .highlight {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-weight: 700;
    font-size: 1.05rem;
}

/* ========================================
   NEW ENHANCEMENT FEATURES STYLES
   ======================================== */

/* Feature Tabs */
.feature-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-top: 1rem;
}

.feature-tab {
    padding: 0.875rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: #2d3748;
}

.feature-tab i {
    font-size: 1.1rem;
    color: #667eea;
    transition: all 0.3s ease;
}

.feature-tab:hover {
    border-color: #667eea;
    background: linear-gradient(135deg, #f0f4ff 0%, #e8edff 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.15);
}

.feature-tab.active {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.feature-tab.active i {
    color: white;
}

/* Feature Content Sections */
.feature-content {
    margin-top: 1.5rem;
}

/* Result Display Components */
.result-display {
    padding: 1.5rem;
    background: linear-gradient(135deg, #f0fff4 0%, #e6fffa 100%);
    border-radius: 12px;
    text-align: center;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    font-family: 'Courier New', monospace;
    margin-bottom: 0.5rem;
}

/* Formula Display */
.formula-display {
    padding: 1.5rem;
    background: linear-gradient(135deg, #fffaf0 0%, #fff5e6 100%);
    border-radius: 12px;
    min-height: 100px;
}

.calculation-steps {
    font-family: 'Courier New', monospace;
    line-height: 1.8;
    color: #2d3748;
}

.calculation-steps .step {
    margin: 1rem 0;
    padding: 0.75rem;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

/* Compound Volume Shapes List */
.shapes-list {
    max-height: 300px;
    overflow-y: auto;
    padding: 0.5rem;
}

.shape-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #f8faff 0%, #f0f4ff 100%);
    border-radius: 8px;
    border-left: 4px solid #48bb78;
    transition: all 0.3s ease;
}

.shape-list-item.subtract {
    border-left-color: #f56565;
}

.shape-list-item:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.15);
}

.shape-list-item .shape-info {
    flex: 1;
}

.shape-list-item .shape-name {
    font-weight: 600;
    color: #2d3748;
    font-size: 0.95rem;
}

.shape-list-item .shape-params {
    font-size: 0.85rem;
    color: #718096;
    margin-top: 0.25rem;
}

.shape-list-item .shape-volume {
    font-family: 'Courier New', monospace;
    font-weight: 700;
    color: #667eea;
    font-size: 1rem;
}

.shape-list-item .shape-operation {
    font-size: 1.25rem;
    margin: 0 0.75rem;
    color: #48bb78;
}

.shape-list-item.subtract .shape-operation {
    color: #f56565;
}

/* Three.js Container */
.threejs-container {
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, #f8faff 0%, #f0f4ff 100%);
    border-radius: 12px;
    margin: 1rem 0;
    position: relative;
    overflow: hidden;
}

.threejs-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.loading-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.1rem;
    font-weight: 500;
}

.view-toggle {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.view-controls {
    margin-top: 1rem;
}

/* Utility Classes */
.w-100 {
    width: 100%;
}

.d-flex {
    display: flex;
}

.gap-2 {
    gap: 0.5rem;
}

.flex-fill {
    flex: 1;
}

.mt-4 {
    margin-top: 1.5rem;
}

/* Responsive for Enhancement Features */
@media (max-width: 992px) {
    .feature-tabs {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .threejs-container {
        height: 400px;
    }

    .result-value {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .feature-tabs {
        grid-template-columns: 1fr;
    }

    .feature-tab {
        font-size: 0.85rem;
        padding: 0.75rem;
    }

    .threejs-container {
        height: 300px;
    }

    .result-value {
        font-size: 1.75rem;
    }

    .view-toggle {
        flex-direction: column;
    }
}