:root {
    --primary: #1a3a5a; 
    --secondary: #4a5568;
    --bg: #f7fafc;
    --white: #ffffff;
    --border: #e2e8f0;
    --error-bg: #f8d7da;
    --error-text: #721c24;
    --error-border: #f5c6cb;
}

body {
    font-family: 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg);
    color: #333;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 3px solid var(--primary);
    padding-bottom: 10px;
}

header h1 {
    color: var(--primary);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

header p {
    color: var(--secondary);
    font-style: italic;
}

.search-box {
    background: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 40px;
}

.form-group {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: bold;
    margin-bottom: 5px;
    color: var(--primary);
}

input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 16px;
    box-sizing: border-box;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.btn-search {
    width: 100%;
    background-color: var(--primary);
    color: white;
    padding: 12px;
    border: none;
    border-radius: 4px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
}

.btn-search:hover {
    background-color: #2c5282;
}

.error-msg {
    color: var(--error-text);
    background-color: var(--error-bg);
    border: 1px solid var(--error-border);
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    display: none;
    margin-top: 5px;
}