:root {
    --color-white: #ffffff;
    --color-light-gray: #f4f4f9;
    --color-blue: #007bff;
    --color-blue-hover: #0056b3;
    --color-green: #28a745;
    --color-green-hover: #218838;
    --color-text: #333333;
    --color-border: #e0e0e0;
    
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--color-light-gray);
    color: var(--color-text);
    line-height: 1.6;
    padding: var(--spacing-md);
}

h1, h2, h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-blue);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

header {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl) auto;
    text-align: center;
}

main {
    max-width: 800px;
    margin: 0 auto;
}

section {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.result-box {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 600px) {
    .result-box {
        flex-direction: row;
    }
}

input[type="text"] {
    flex-grow: 1;
    padding: var(--spacing-md);
    font-size: 1.2rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-light-gray);
    color: var(--color-text);
}

button {
    background-color: var(--color-blue);
    color: var(--color-white);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: bold;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: var(--color-blue-hover);
}

#copy-btn {
    background-color: var(--color-green);
}

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

.controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.controls label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.1rem;
}

input[type="range"] {
    width: 100%;
    margin-top: var(--spacing-sm);
    cursor: pointer;
}

input[type="checkbox"] {
    width: 1.2rem;
    height: 1.2rem;
    cursor: pointer;
}

#generate-btn {
    margin-top: var(--spacing-lg);
    width: 100%;
    padding: 1.2rem;
    font-size: 1.2rem;
}

/* --- Homepage UI --- */
.search-bar {
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-md);
    font-size: 1.1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin: var(--spacing-md) auto;
    display: block;
    background-color: var(--color-white);
    color: var(--color-text);
}

.category-section {
    background-color: transparent;
    box-shadow: none;
    padding: 0;
    margin-bottom: var(--spacing-xl);
}

.category-section h2 {
    border-bottom: 2px solid var(--color-border);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.tool-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    text-decoration: none;
}

.tool-card h3 {
    color: var(--color-blue);
    margin-bottom: var(--spacing-sm);
}

.tool-card p {
    margin-bottom: 0;
    font-size: 0.95rem;
    color: #555;
}

.tool-card.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

footer {
    max-width: 800px;
    margin: var(--spacing-xl) auto var(--spacing-md) auto;
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    color: #666;
    font-size: 0.9rem;
}

footer a {
    color: #666;
    margin: 0 var(--spacing-sm);
}

footer a:hover {
    color: var(--color-blue);
}

/* --- Monetization Placeholders --- */
.ad-slot {
    width: 100%;
    margin: var(--spacing-md) 0;
    text-align: center;
    display: none; 
}

/* Affiliations */
.affiliate-box {
    background-color: #f8f9fa;
    border-left: 4px solid var(--color-green);
    padding: var(--spacing-md);
    margin-top: var(--spacing-lg);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.affiliate-box h3 {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.affiliate-box p {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.affiliate-link {
    display: inline-block;
    color: var(--color-green);
    font-weight: bold;
    text-decoration: none;
}

.affiliate-link:hover {
    text-decoration: underline;
}