:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --container-bg: #fff;
    --container-shadow: rgba(0, 0, 0, 0.05);
    --h1-color: #212529;
    --btn-bg: #007BFF;
    --btn-hover: #0056b3;
    --number-bg: #4CAF50;
    --number-text: #fff;
    --candidate-bg: #f1f3f5;
    --recommended-bg: #fff9db;
    --recommended-border: #fcc419;
    --header-bg: #fff;
    --footer-bg: #fff;
    --card-bg: #fff;
    --border-color: #dee2e6;
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #e9ecef;
    --container-bg: #1e1e1e;
    --container-shadow: rgba(0, 0, 0, 0.3);
    --h1-color: #fff;
    --btn-bg: #339af0;
    --btn-hover: #228be6;
    --number-bg: #40c057;
    --number-text: #fff;
    --candidate-bg: #2b2b2b;
    --recommended-bg: #332b12;
    --recommended-border: #fcc419;
    --header-bg: #1e1e1e;
    --footer-bg: #1e1e1e;
    --card-bg: #1e1e1e;
    --border-color: #343a40;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.6;
}

/* Header */
.header {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.header h1 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--h1-color);
}

/* Main Layout */
.main-content {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 20px;
}

.container {
    background-color: var(--container-bg);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--container-shadow);
    text-align: center;
    margin-bottom: 2rem;
}

.container h2 {
    margin-top: 0;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Info Sections */
.info-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.info-card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.info-card h3 {
    margin-top: 0;
    font-size: 1.1rem;
    color: var(--btn-bg);
    margin-bottom: 0.75rem;
}

.info-card p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.9;
}

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

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--btn-bg);
    text-decoration: none;
    margin: 0 10px;
    font-size: 0.85rem;
}

.footer p {
    font-size: 0.8rem;
    opacity: 0.7;
    margin: 0;
}

/* Lotto Elements */
.lotto-candidates-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 2rem;
    min-height: 50px;
}

#placeholder-text {
    opacity: 0.5;
    font-style: italic;
}

.candidate-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    border-radius: 8px;
    background-color: var(--candidate-bg);
    border: 2px solid transparent;
}

.candidate-row.recommended {
    background-color: var(--recommended-bg);
    border-color: var(--recommended-border);
}

.recommended-badge {
    background-color: var(--recommended-border);
    color: #333;
    font-size: 0.75rem;
    font-weight: bold;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
}

.numbers-list {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--number-bg);
    color: var(--number-text);
    font-size: 16px;
    font-weight: bold;
}

#generate-btn {
    padding: 0.8rem 2.5rem;
    border: none;
    border-radius: 8px;
    background-color: var(--btn-bg);
    color: #fff;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

#generate-btn:hover {
    background-color: var(--btn-hover);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: var(--candidate-bg);
}

@media (max-width: 480px) {
    .container {
        padding: 1.5rem;
    }
    .number {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
}