/* Date Difference Calculator Light Theme */

/* Tool Layout */

/* Dark mode overrides */
[data-theme="dark"] {
    --tool-bg: #0f172a;
    --tool-border: #334155;
    --tool-border-hover: #475569;
    --tool-text: #f8fafc;
    --tool-text-secondary: #94a3b8;
    --tool-input-bg: #1e293b;
    --tool-input-border: #334155;
    --tool-button-bg: #1e293b;
    --tool-button-hover: #334155;
    --tool-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --tool-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --surface-color: #1e293b;
    --surface-hover: #334155;
    --background-color: #0f172a;
    --text-color: #f8fafc;
    --status-info: rgba(96, 165, 250, 0.2);
    --status-success: rgba(34, 197, 94, 0.2);
    --status-error: rgba(248, 113, 113, 0.2);
    --bg-color: #0f172a;
}

/* Dark mode element overrides */
[data-theme="dark"] .tool-card {
    background: var(--bg-card, #1e293b);
    border-color: var(--border-color, #334155);
}

[data-theme="dark"] .tool-hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background: var(--input-bg, #1e293b);
    color: var(--text-primary, #f8fafc);
    border-color: var(--border-color, #334155);
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
    color: var(--text-muted, #64748b);
}

[data-theme="dark"] .tab-btn.active {
    color: white;
}

[data-theme="dark"] label {
    color: var(--text-primary, #f8fafc);
}

[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3,
[data-theme="dark"] h4, [data-theme="dark"] h5, [data-theme="dark"] h6 {
    color: var(--text-primary, #f8fafc);
}

[data-theme="dark"] p {
    color: var(--text-secondary, #cbd5e1);
}
.tool-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
    margin: 2rem 0;
}

.tool-main {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Calculator Card */
.calculator-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e9ecef;
}

.card-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin: 0;
    font-weight: 600;
}

/* Mode Selection */
.calculation-mode {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-secondary);
    padding: 0.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.mode-btn {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    var(--bg-primary)-space: nowrap;
}

.mode-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.mode-btn.active {
    background: #007bff;
    color: var(--bg-primary);
    box-shadow: 0 2px 4px rgba(0, 123, 255, 0.3);
}

/* Calculation Sections */
.calculation-section {
    animation: fadeIn 0.3s ease;
}

.calculation-section.hidden {
    display: none;
}

/* Input Grid */
.input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

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

.input-group label {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.date-input, .time-input, .number-input, .text-input {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.date-input:focus, .time-input:focus, .number-input:focus, .text-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.time-input {
    display: none;
    margin-top: 0.5rem;
}

.number-input-group {
    display: flex;
    gap: 0.5rem;
}

.operation-select {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    min-width: 100px;
}

.operation-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.number-input {
    flex: 1;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Checkbox Styling */
.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.9rem;
    -webkit-user-select: none;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: all 0.2s ease;
}

.checkbox-label:hover .checkmark {
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: #007bff;
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid var(--bg-primary);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Radio Button Styling */
.unit-selector {
    margin-bottom: 1.5rem;
}

.unit-selector label {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    display: block;
}

.radio-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.9rem;
    -webkit-user-select: none;
    user-select: none;
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-mark {
    width: 18px;
    height: 18px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    position: relative;
    transition: all 0.2s ease;
}

.radio-label:hover .radio-mark {
    border-color: var(--primary-color);
}

.radio-label input[type="radio"]:checked + .radio-mark {
    border-color: var(--primary-color);
    background: #007bff;
}

.radio-label input[type="radio"]:checked + .radio-mark::after {
    content: '';
    position: absolute;
    top: 4px;
    left: 4px;
    width: 8px;
    height: 8px;
    background: var(--bg-primary);
    border-radius: 50%;
}

/* Holiday Options */
.holiday-options {
    margin-bottom: 1.5rem;
}

.holiday-options label {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    display: block;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.custom-holidays {
    margin-top: 1rem;
}

.custom-holidays.hidden {
    display: none;
}

.custom-holidays label {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: block;
}

/* Calculate Button */
.calculate-btn {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: var(--bg-primary);
    border: none;
    border-radius: 12px;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
}

.calculate-btn:hover {
    background: linear-gradient(135deg, #218838, #1da88a);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

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

.btn-icon {
    font-size: 1.2rem;
}

/* Results Card */
.results-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.copy-btn {
    background: #6c757d;
    color: var(--bg-primary);
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: #5a6268;
    transform: translateY(-1px);
}

/* Results Content */
.results-placeholder, .error-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
}

.placeholder-icon, .error-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.results-placeholder h4, .error-state h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.error-state .error-icon {
    color: #dc3545;
}

.error-state h4 {
    color: #dc3545;
}

/* Result Summary */
.result-summary {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #e9ecef;
}

.result-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.result-unit {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.result-breakdown {
    color: var(--text-primary);
    font-size: 1rem;
}

/* Result Details */
.result-details {
    margin-bottom: 2rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.detail-item {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.detail-item:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.detail-item.highlight {
    background: linear-gradient(135deg, #e7f3ff, #cce7ff);
    border-color: var(--primary-color);
}

.detail-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-value {
    display: block;
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 600;
}

.detail-item.highlight .detail-value {
    color: var(--primary-color);
}

/* Calculation Summary */
.calculation-summary {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.calc-step {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid #dee2e6;
}

.calc-step:last-child {
    border-bottom: none;
    margin-top: 0.5rem;
    padding-top: 1rem;
    border-top: 2px solid #007bff;
}

.calc-step.result-step {
    font-weight: 600;
}

.calc-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.calc-value {
    color: var(--text-primary);
    font-weight: 500;
}

.result-step .calc-value {
    color: var(--primary-color);
    font-size: 1.1rem;
}

/* Result Dates */
.result-dates {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.date-range {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.date-range:last-child {
    margin-bottom: 0;
}

.date-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.date-value {
    color: var(--text-primary);
    font-weight: 600;
    font-family: 'Monaco', 'Menlo', monospace;
}

/* Result Info */
.result-info {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.info-icon {
    font-size: 1.1rem;
}

/* Holidays List */
.holidays-list {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e9ecef;
}

.holidays-list h4 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.holiday-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.holiday-item {
    background: var(--bg-primary)3cd;
    color: var(--warning-color);
    padding: 0.25rem 0.75rem;
    border-radius: 16px;
    font-size: 0.8rem;
    border: 1px solid #ffeaa7;
}

/* Quick Actions */
.quick-actions {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.quick-actions h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin: 0 0 1rem 0;
    font-weight: 600;
}

.quick-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.75rem;
}

.quick-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.quick-btn:hover {
    background: #007bff;
    color: var(--bg-primary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Sidebar */
.tool-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.info-card h3 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin: 0 0 1rem 0;
    font-weight: 600;
}

/* Feature List */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.feature-item:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

.feature-icon {
    font-size: 1.5rem;
    min-width: 32px;
}

.feature-content h4 {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin: 0 0 0.25rem 0;
    font-weight: 600;
}

.feature-content p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
    line-height: 1.4;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.feature-tag {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-secondary);
    padding: 0.75rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.feature-tag:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

.tag-icon {
    font-size: 1rem;
}

/* Use Cases */
.use-cases {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.use-case {
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.use-case h4 {
    color: var(--text-primary);
    font-size: 0.9rem;
    margin: 0 0 0.5rem 0;
    font-weight: 600;
}

.use-case p {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin: 0;
    line-height: 1.4;
}

/* Tips List */
.tips-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.tip-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-primary);
    font-size: 0.85rem;
    line-height: 1.4;
}

.tip-icon {
    font-size: 1rem;
    margin-top: 0.1rem;
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #28a745;
    color: var(--bg-primary);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    animation: slideInRight 0.3s ease;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .tool-layout {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tool-sidebar {
        order: -1;
    }
}

@media (max-width: 768px) {
    .calculator-card,
    .results-card {
        padding: 1.5rem;
    }
    
    .input-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .options-grid,
    .checkbox-grid {
        grid-template-columns: 1fr;
    }
    
    .calculation-mode {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .mode-btn {
        justify-content: center;
    }
    
    .detail-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .result-value {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .calculator-card,
    .results-card,
    .quick-actions,
    .info-card {
        padding: 1rem;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .number-input-group {
        flex-direction: column;
    }
    
    .radio-group {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .result-value {
        font-size: 1.8rem;
    }
    
    .quick-buttons {
        grid-template-columns: 1fr;
    }
}
/* Notification dark mode */
[data-theme="dark"] .notification.success {
    background: rgba(34, 197, 94, 0.2);
    border-color: rgba(34, 197, 94, 0.4);
    color: #4ade80;
}

[data-theme="dark"] .notification.warn {
    background: rgba(251, 191, 36, 0.2);
    border-color: rgba(251, 191, 36, 0.4);
    color: #fbbf24;
}

[data-theme="dark"] .notification.error {
    background: rgba(248, 113, 113, 0.2);
    border-color: rgba(248, 113, 113, 0.4);
    color: #f87171;
}

[data-theme="dark"] .notification.info {
    background: rgba(96, 165, 250, 0.2);
    border-color: rgba(96, 165, 250, 0.4);
    color: #60a5fa;
}