:root {
    --primary-color: #022345;
    --secondary-color: #000000;
    --accent-color: #A4DFF5;
    --background-color: #ffffff;
    --text-color: #000000;
    --border-color: #A4DFF5;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Lora', serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-family: 'Lato', sans-serif;
    font-weight: 700;
    letter-spacing: 0.5px;
}

header p {
    color: var(--secondary-color);
    font-family: 'Lora', serif;
    font-weight: 400;
}

.top-nav {
    display: flex;
    justify-content: flex-end;
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.logo-link {
    display: block;
}

.logo {
    width: 50px;
    height: 50px;
}

.home-button {
    padding: 0.5rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-family: 'Lato', sans-serif;
    font-weight: 500;
    transition: background-color 0.3s;
}

.home-button:hover {
    background-color: var(--secondary-color);
}

.search-builder {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.search-input {
    margin-bottom: 2rem;
}

.main-input {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    transition: border-color 0.3s;
}

.main-input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.operators-section {
    display: grid;
    gap: 2rem;
    margin-bottom: 2rem;
}

.operator-group {
    background: var(--accent-color);
    padding: 1.5rem;
    border-radius: 6px;
}

.operator-group h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
    font-family: 'Lato', sans-serif;
    font-weight: 700;
}

.operator-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.operator-buttons button {
    padding: 0.5rem 1rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Lato', sans-serif;
    font-weight: 500;
}

.operator-buttons button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.operator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.operator-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.operator-item input,
.operator-item select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.date-filters {
    margin-top: 1rem;
}

.date-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.result-section {
    background: var(--background-color);
    padding: 1.5rem;
    border-radius: 6px;
    margin-top: 2rem;
}

.result-box {
    background: white;
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    margin-top: 1rem;
}

#searchResult {
    font-family: monospace;
    white-space: pre-wrap;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: #f1f3f4;
    border-radius: 4px;
}

.copy-btn,
.search-btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    margin-right: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: bold;
    font-family: 'Lato', sans-serif;
}

.copy-btn:hover,
.search-btn:hover {
    background: var(--secondary-color);
}

.operator-guide {
    margin-top: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.guide-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.guide-item {
    padding: 1rem;
    background: var(--background-color);
    border-radius: 4px;
}

.guide-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-family: 'Lato', sans-serif;
    font-weight: 600;
}

.guide-item p,
.guide-item small {
    font-family: 'Lora', serif;
}

.use-cases {
    margin-top: 3rem;
    padding: 2rem 0;
}

.use-cases h2,
.tips-section h2 {
    color: var(--primary-color);
    font-family: 'Lato', sans-serif;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

.use-case-card {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.use-case-card h3 {
    color: var(--primary-color);
    font-family: 'Lato', sans-serif;
    margin-bottom: 1rem;
}

.use-case-card ul {
    list-style: none;
    padding: 0;
}

.use-case-card li {
    margin-bottom: 1rem;
    line-height: 1.6;
    font-family: 'Lora', serif;
}

.use-case-card li strong {
    color: var(--primary-color);
    font-family: 'Lato', sans-serif;
}

.tips-section {
    margin: 3rem 0;
    padding: 2rem 0;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tip-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.tip-card h4 {
    color: var(--primary-color);
    font-family: 'Lato', sans-serif;
    margin-bottom: 1rem;
}

.tip-card p {
    font-family: 'Lora', serif;
    line-height: 1.6;
}

footer {
    margin-top: 4rem;
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0 0.5rem;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .operator-grid {
        grid-template-columns: 1fr;
    }
    
    .date-inputs {
        grid-template-columns: 1fr;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .use-case-card {
        padding: 1.5rem;
    }
}