* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    background: var(--header-bg);
    color: var(--header-text);
    padding: 25px 0;
    text-align: left;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: var(--card-shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 25px;
}

.logo-container h1 {
    font-size: 2.5rem;
    margin-bottom: 8px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-container .description {
    font-size: 1.1rem;
    color: var(--header-text);
    opacity: 0.9;
    max-width: 600px;
}

.header-stats {
    display: flex;
    gap: 30px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Results Container */
.results-container {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    margin-bottom: 30px;
    position: relative;
    transition: background-color 0.3s ease;
}

.results-header {
    display: grid;
    grid-template-columns: 100px 1fr 120px;
    gap: 50px;
    padding: 15px 20px;
    background-color: var(--dark);
    color: white;
    font-weight: 500;
    position: sticky;
    top: 0;
    z-index: 5;
}

.result-item {
    display: grid;
    grid-template-columns: 100px 1fr 120px;
    gap: 50px;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border);
    transition: background-color 0.2s;
    cursor: pointer;
}

.result-item:hover {
    background-color: var(--bg-primary);
}

.col-code {
    white-space: nowrap;
    font-weight: 600;
    color: var(--primary);
}

.results-header .col-actions {
    display: flex;
    justify-content: center;
}

.col-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.action-btn {
    padding: 6px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: white;
    cursor: pointer;
    color: var(--secondary);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn:hover {
    background-color: #f1f5f9;
    color: var(--primary);
}

.copy-btn {
    position: relative;
}

.copy-btn.copied {
    background-color: var(--success);
    color: white;
    border-color: var(--success);
}

.no-results {
    padding: 40px;
    text-align: center;
    color: var(--gray);
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--border);
}

.loading-results {
    display: none;
    padding: 20px;
    text-align: center;
    color: var(--secondary);
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.loading-results.show {
    display: flex;
}

.spinner {
    width: 30px;
    height: 30px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--card-shadow);
    transition: background-color 0.3s ease;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 20px;
}

.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.footer-section p, .footer-section li {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: var(--primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--gray);
    font-size: 0.9rem;
}

/* Toast Notification */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: white;
    color: var(--dark);
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: var(--hover-shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1001;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-icon {
    color: var(--success);
    font-size: 1.2rem;
}

.toast-message {
    font-weight: 500;
}

/* Back to top button */
#backToTop {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 99;
    width: 50px;
    height: 50px;
    border: none;
    outline: none;
    background-color: var(--primary);
    color: white;
    cursor: pointer;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--card-shadow);
    transition: all 0.3s;
}

#backToTop:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@media (max-width: 968px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .header-stats {
        justify-content: center;
    }
    
    .results-header, .result-item {
        grid-template-columns: 1fr auto;
    }
    
    .col-code, .col-desc, .col-actions {
        margin-bottom: 8px;
    }

    .theme-toggle-container {
        margin-top: 15px;
    }
}

@media (max-width: 768px) {
    .search-box {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    header {
        padding: 20px 0;
    }
    
    .logo-container h1 {
        font-size: 2rem;
    }
    
    .search-container, .results-container, footer {
        padding: 15px;
    }
    
    .filter-options {
        flex-direction: column;
        gap: 10px;
    }
}