:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5a623;
    --bg-color: #f0f8ff;
    --card-bg: #ffffff;
    --text-color: #333;
    --header-font: 'Comic Neue', cursive;
    --body-font: 'Roboto', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--body-font);
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

header h1 {
    font-family: var(--header-font);
    margin: 0;
    font-size: 2.5rem;
}

main {
    flex: 1;
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 1rem;
    width: 100%;
    box-sizing: border-box;
}

.controls {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

.pos-selector h3 {
    margin-top: 0;
    font-family: var(--header-font);
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 1.1rem;
}

.checkbox-group input {
    margin-right: 0.5rem;
    width: 1.2rem;
    height: 1.2rem;
}

.count-selector, .sort-selector {
    margin-bottom: 1rem;
    display: inline-block;
    margin-right: 2rem;
}

input[type="number"], select {
    padding: 0.5rem;
    border-radius: 5px;
    border: 1px solid #ccc;
    font-size: 1rem;
}

.btn-explore {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    font-size: 1.2rem;
    border-radius: 25px;
    cursor: pointer;
    font-family: var(--header-font);
    font-weight: bold;
    transition: transform 0.2s, background-color 0.2s;
    display: block;
    margin-top: 1rem;
}

.btn-explore:hover {
    background-color: #e09612;
    transform: scale(1.05);
}

.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.pos-group {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border-top: 5px solid var(--primary-color);
}

.pos-title {
    margin: 0 0 1rem 0;
    font-family: var(--header-font);
    color: var(--primary-color);
    text-transform: capitalize;
    border-bottom: 2px solid var(--bg-color);
    padding-bottom: 0.5rem;
}

.word-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.word-card {
    background: var(--bg-color);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.char-count {
    background: var(--primary-color);
    color: white;
    font-size: 0.7rem;
    padding: 2px 5px;
    border-radius: 10px;
    min-width: 15px;
    text-align: center;
}

.welcome-message {
    text-align: center;
    padding: 3rem;
    color: #888;
    font-size: 1.2rem;
    background: white;
    border-radius: 15px;
}

footer {
    text-align: center;
    padding: 2rem;
    color: #666;
    font-size: 0.9rem;
}