/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Advanced Dark Theme Colors (Default) */
    --primary-bg: #0c0c0c;
    --secondary-bg: #1a1a1a;
    --tertiary-bg: #2a2a2a;
    --accent-bg: #3a3a3a;
    
    --primary-text: #ffffff;
    --secondary-text: #b8b8b8;
    --accent-text: #00d4ff;
    
    --primary-accent: #00d4ff;
    --secondary-accent: #0099cc;
    --success-color: #00ff88;
    --warning-color: #ffaa00;
    --error-color: #ff4444;
    
    --border-color: #333333;
    --border-hover: #555555;
    
    /* Enhanced Shadows with Multiple Colors */
    --shadow-light: 0 2px 8px rgba(0, 212, 255, 0.1);
    --shadow-medium: 0 4px 16px rgba(0, 212, 255, 0.15);
    --shadow-heavy: 0 8px 32px rgba(0, 212, 255, 0.2);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    
    /* Advanced Gradients */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0099cc 50%, #0066aa 100%);
    --gradient-secondary: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 50%, #3a3a3a 100%);
    --gradient-accent: linear-gradient(135deg, #00d4ff 0%, #00a8ff 50%, #0099cc 100%);
    --gradient-success: linear-gradient(135deg, #00ff88 0%, #00cc66 50%, #00aa44 100%);
    --gradient-warning: linear-gradient(135deg, #ffaa00 0%, #ff8800 50%, #ff6600 100%);
    --gradient-error: linear-gradient(135deg, #ff4444 0%, #cc3333 50%, #aa2222 100%);
    --gradient-dark: linear-gradient(135deg, #0c0c0c 0%, #1a1a1a 50%, #2a2a2a 100%);
    --gradient-card: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 50%, #3a3a3a 100%);
    --gradient-button: linear-gradient(135deg, #00d4ff 0%, #0099cc 50%, #0066aa 100%);
    --gradient-button-hover: linear-gradient(135deg, #00e6ff 0%, #00bbdd 50%, #0088bb 100%);
    
    --border-radius: 12px;
    --border-radius-small: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gradient-dark);
    color: var(--primary-text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Container */
.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--gradient-card);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0 0 0;
    margin-bottom: 30px;
    box-shadow: var(--shadow-medium);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0.8;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    padding: 0 0 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    font-size: 2rem;
    color: var(--primary-accent);
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.header-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.last-updated {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

.refresh-btn {
    background: var(--gradient-button);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.refresh-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-button-hover);
    opacity: 0;
    transition: var(--transition);
    border-radius: 50%;
}

.refresh-btn:hover {
    transform: rotate(180deg) scale(1.1);
    box-shadow: var(--shadow-glow);
}

.refresh-btn:hover::before {
    opacity: 1;
}

.refresh-btn i {
    color: white;
    font-size: 1.1rem;
}

/* Theme and Language Toggle Buttons */
.theme-toggle-btn, .language-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-button);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.theme-toggle-btn::before, .language-toggle-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-button-hover);
    opacity: 0;
    transition: var(--transition);
    border-radius: 50%;
}

.theme-toggle-btn:hover, .language-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

.theme-toggle-btn:hover::before, .language-toggle-btn:hover::before {
    opacity: 1;
}

.theme-toggle-btn i, .language-toggle-btn i {
    color: white;
    font-size: 1.1rem;
    transition: var(--transition);
    z-index: 1;
    position: relative;
}

.theme-toggle-btn:hover i, .language-toggle-btn:hover i {
    transform: rotate(180deg);
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    flex: 1;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* Bottom Panel */
.bottom-panel {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.bottom-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.3;
}

.bottom-panel .panel-header {
    background: var(--tertiary-bg);
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.bottom-panel .panel-header h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0;
}

.bottom-panel .panel-header i {
    color: var(--primary-accent);
}

.panel-instructions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    padding: 8px 12px;
    background: var(--accent-bg);
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--secondary-text);
}

.panel-instructions i {
    color: var(--primary-accent);
    font-size: 0.8rem;
}

.summary-results-container {
    padding: 20px;
    min-height: 200px;
}

.summary-results-container .no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 150px;
    color: var(--secondary-text);
    text-align: center;
}

.summary-results-container .no-results i {
    font-size: 2.5rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

/* Target Currency Input Items */
.target-currency-input-item {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 15px;
    align-items: center;
    padding: 15px;
    background: var(--tertiary-bg);
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
}

.target-currency-input-item:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-light);
}

.target-currency-input-item .currency-select select {
    width: 100%;
    padding: 12px 15px;
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--primary-text);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.target-currency-input-item .currency-select select:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.target-currency-input-item .currency-select select option {
    background: var(--accent-bg);
    color: var(--primary-text);
}

.target-currency-input-item .amount-input {
    position: relative;
}

.target-currency-input-item .amount-input input {
    width: 100%;
    padding: 12px 15px;
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--primary-accent);
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    pointer-events: none; /* 禁用输入，只显示计算结果 */
}

.target-currency-input-item .remove-currency {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--error-color);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
}

.target-currency-input-item:hover .remove-currency {
    opacity: 1;
}

.target-currency-input-item .remove-currency:hover {
    transform: scale(1.1);
}

.target-currency-input-item .remove-currency i {
    color: white;
    font-size: 12px;
}

/* Responsive adjustments for new layout */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }
    
    .main-content {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .target-currency-input-item {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .summary-results-container {
        min-height: 150px;
    }
}

/* Panels */
.left-panel, .right-panel {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    position: relative;
}

.left-panel::before, .right-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.3;
}

.panel-header {
    background: var(--tertiary-bg);
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.panel-header i {
    color: var(--primary-accent);
}

/* Sync Options */
.sync-options {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.sync-option {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--secondary-text);
    transition: var(--transition);
}

.sync-option:hover {
    color: var(--primary-text);
}

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

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: var(--transition);
}

.sync-option input[type="checkbox"]:checked + .checkmark {
    background: var(--gradient-primary);
    border-color: var(--primary-accent);
}

.sync-option input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* Currency Inputs */
.currency-inputs {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.currency-input-item {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 15px;
    align-items: center;
    padding: 15px;
    background: var(--tertiary-bg);
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.currency-input-item:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-light);
}

.currency-select {
    position: relative;
}

.currency-select select {
    width: 100%;
    padding: 12px 15px;
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--primary-text);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.currency-select select:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.currency-select select option {
    background: var(--accent-bg);
    color: var(--primary-text);
}

.amount-input {
    position: relative;
}

.amount-input input {
    width: 100%;
    padding: 12px 15px;
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--primary-text);
    font-size: 1rem;
    transition: var(--transition);
}

.amount-input input:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.amount-input input::placeholder {
    color: var(--secondary-text);
}

.remove-currency {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--error-color);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
}

.currency-input-item:hover .remove-currency {
    opacity: 1;
}

.remove-currency:hover {
    transform: scale(1.1);
}

.remove-currency i {
    color: white;
    font-size: 12px;
}

/* Add Currency Button */
.add-currency-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px;
    background: var(--gradient-button);
    border: none;
    border-radius: var(--border-radius-small);
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin: 20px;
    position: relative;
    overflow: hidden;
}

.add-currency-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.add-currency-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    background: var(--gradient-button-hover);
}

.add-currency-btn:hover::before {
    left: 100%;
}

/* Results */
.results-container {
    padding: 20px;
    min-height: 300px;
}

.no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--secondary-text);
    text-align: center;
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--tertiary-bg);
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
    margin-bottom: 10px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.result-item:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-light);
}

.result-item.pinned {
    background: var(--accent-bg);
    border-color: var(--primary-accent);
    box-shadow: var(--shadow-light);
}

.result-item.pinned::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-accent);
    border-radius: 0 var(--border-radius-small) var(--border-radius-small) 0;
}

.pin-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    margin-left: 10px;
    position: relative;
    overflow: hidden;
}

.pin-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-button);
    opacity: 0;
    transition: var(--transition);
    border-radius: 50%;
}

.pin-button:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

.pin-button:hover::before {
    opacity: 1;
}

.pin-button i {
    color: var(--secondary-text);
    font-size: 14px;
    transition: var(--transition);
}

.pin-button:hover i,
.pin-button i.pinned {
    color: white;
}

.result-currency {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.result-amount {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-accent);
    margin-right: 10px;
}

.currency-flag {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.result-amount {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-accent);
}

/* Function Description */
.function-description {
    background: var(--tertiary-bg);
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.description-content {
    padding: 15px 20px 20px 20px;
}

.description-content h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-text);
    margin: 0 0 10px 0;
}

.description-content h3 i {
    color: var(--primary-accent);
    font-size: 0.9rem;
}

.description-content p {
    color: var(--secondary-text);
    line-height: 1.5;
    margin: 0;
    font-size: 0.9rem;
}

/* Ad Spaces */
.ad-space {
    margin: 20px;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-small);
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.ad-space:hover {
    border-color: var(--border-hover);
}

.ad-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

.ad-placeholder i {
    font-size: 2rem;
    opacity: 0.5;
}

.ad-space-header {
    margin: 20px 0;
    min-height: 80px;
    background: var(--secondary-bg);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
}

.ad-space-2 {
    margin: 20px 0;
}

/* Footer */
.footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-info p {
    color: var(--secondary-text);
    font-size: 0.9rem;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    text-align: center;
    color: var(--primary-text);
}

.loading-spinner i {
    font-size: 3rem;
    color: var(--primary-accent);
    margin-bottom: 20px;
}

.loading-spinner p {
    font-size: 1.1rem;
    color: var(--secondary-text);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 15px 20px;
    min-width: 300px;
    box-shadow: var(--shadow-medium);
    transform: translateX(100%);
    transition: var(--transition);
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.toast.success .toast-icon {
    color: var(--success-color);
}

.toast.error .toast-icon {
    color: var(--error-color);
}

.toast.warning .toast-icon {
    color: var(--warning-color);
}

.toast-message {
    flex: 1;
    font-size: 0.9rem;
}

.toast-close {
    background: none;
    border: none;
    color: var(--secondary-text);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-close:hover {
    color: var(--primary-text);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }
    
    .main-content {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .currency-input-item {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .sync-options {
        flex-direction: column;
        gap: 10px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .toast {
        min-width: 280px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .panel-header {
        padding: 15px;
    }
    
    .currency-inputs {
        padding: 15px;
    }
    
    .results-container {
        padding: 15px;
    }
    
    .toast {
        min-width: 250px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

.currency-input-item {
    animation: fadeIn 0.3s ease-out;
}

.result-item {
    animation: slideIn 0.3s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* Light Theme */
[data-theme="light"] {
    --primary-bg: #ffffff;
    --secondary-bg: #f8f9fa;
    --tertiary-bg: #e9ecef;
    --accent-bg: #dee2e6;
    
    --primary-text: #212529;
    --secondary-text: #6c757d;
    --accent-text: #007bff;
    
    --primary-accent: #007bff;
    --secondary-accent: #0056b3;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --error-color: #dc3545;
    
    --border-color: #dee2e6;
    --border-hover: #adb5bd;
    
    --shadow-light: 0 2px 8px rgba(0, 123, 255, 0.1);
    --shadow-medium: 0 4px 16px rgba(0, 123, 255, 0.15);
    --shadow-heavy: 0 8px 32px rgba(0, 123, 255, 0.2);
    --shadow-glow: 0 0 20px rgba(0, 123, 255, 0.3);
    
    --gradient-primary: linear-gradient(135deg, #007bff 0%, #0056b3 50%, #004085 100%);
    --gradient-secondary: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 50%, #dee2e6 100%);
    --gradient-accent: linear-gradient(135deg, #007bff 0%, #0056b3 50%, #004085 100%);
    --gradient-success: linear-gradient(135deg, #28a745 0%, #1e7e34 50%, #155724 100%);
    --gradient-warning: linear-gradient(135deg, #ffc107 0%, #e0a800 50%, #d39e00 100%);
    --gradient-error: linear-gradient(135deg, #dc3545 0%, #c82333 50%, #bd2130 100%);
    --gradient-dark: linear-gradient(135deg, #ffffff 0%, #f8f9fa 50%, #e9ecef 100%);
    --gradient-card: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 50%, #dee2e6 100%);
    --gradient-button: linear-gradient(135deg, #007bff 0%, #0056b3 50%, #004085 100%);
    --gradient-button-hover: linear-gradient(135deg, #0056b3 0%, #004085 50%, #003d82 100%);
}

/* Language Styles */
[data-lang="en"] .zh-text {
    display: none !important;
}

[data-lang="zh"] .en-text {
    display: none !important;
}

/* 确保语言切换规则优先级 */
body[data-lang="en"] .zh-text {
    display: none !important;
}

body[data-lang="zh"] .en-text {
    display: none !important;
}

/* Theme Icon States */
[data-theme="dark"] #themeIcon::before {
    content: "\f186"; /* moon icon */
}

[data-theme="light"] #themeIcon::before {
    content: "\f185"; /* sun icon */
}

/* Language Icon States */
[data-lang="zh"] #languageIcon::before {
    content: "\f0ac"; /* globe icon */
}

[data-lang="en"] #languageIcon::before {
    content: "\f0ac"; /* globe icon */
}