/* Base Styles */
:root {
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
    --border-radius: 8px;
    --transition-speed: 0.3s;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
}

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

html, body {
    height: 100%;
    font-family: var(--font-primary);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

button {
    cursor: pointer;
    font-family: var(--font-primary);
    border: none;
    border-radius: var(--border-radius);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

ul {
    list-style: none;
}

/* Header */
header {
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.5rem;
    font-weight: bold;
}

nav ul {
    display: flex;
    gap: var(--spacing-lg);
}

.theme-toggle button {
    background: none;
    border: none;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-xxl) 0;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

.credits {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
}

.credits p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.credits a {
    font-weight: 500;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

/* Tools Grid */
.tools {
    padding: var(--spacing-xxl) 0;
}

.tools h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* Search and Filter */
.search-filter-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.search-container {
    position: relative;
    flex: 1;
    max-width: 500px;
    min-width: 250px;
}

.search-icon {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-primary);
    font-size: 1.1rem;
    opacity: 0.8;
    pointer-events: none;
    transition: right 0.2s ease;
}

.search-clear-btn {
    position: absolute;
    right: calc(var(--spacing-md) * 2.5);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
    z-index: 2;
}

.search-clear-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}

[data-theme="dark"] .search-clear-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.search-clear-btn.hidden {
    display: none;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md);
    padding-right: calc(var(--spacing-md) * 2.5);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-size: 1rem;
    background-color: var(--input-bg);
    color: var(--text-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.2);
}

.search-input:focus + .search-icon {
    opacity: 1;
}

.filter-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.filter-label {
    font-weight: 500;
    color: var(--text-primary);
}

.category-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    min-width: 180px;
}

.category-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.2);
}

.category-select:hover {
    border-color: var(--primary-color);
}

.category-tag {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 12px;
    background-color: var(--primary-color);
    color: white;
    opacity: 0.85;
    font-weight: 500;
    letter-spacing: 0.5px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.tool-card:hover .category-tag {
    transform: translateY(-2px);
    opacity: 1;
}

.no-results-message {
    text-align: center;
    padding: var(--spacing-xl);
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.tool-card {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.tool-card:hover {
    transform: translateY(-5px);
}

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

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

.tool-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Main content area */
main {
    flex: 1 0 auto; /* This allows main to grow and take available space */
}

/* Footer */
footer {
    flex-shrink: 0; /* Prevents footer from shrinking */
    text-align: center;
    padding: var(--spacing-xl) 0;
    width: 100%;
    position: relative;
    z-index: 10;
    box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.05);
}

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

footer a {
    margin: 0 var(--spacing-xs);
}

/* Tool Pages */
.tool-container {
    padding: var(--spacing-xl) 0;
}

.tool-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

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

.tool-content {
    max-width: 1000px;
    margin: 0 auto;
}

.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: bold;
}

.input-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

textarea, input[type="text"] {
    width: 100%;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    font-family: var(--font-mono);
    resize: vertical;
    min-height: 150px;
    transition: border-color var(--transition-speed);
}

input[type="text"] {
    min-height: auto;
}

button.primary {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: bold;
}

button.icon-button {
    padding: var(--spacing-xs);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-container {
    margin-top: var(--spacing-xl);
}

.error-message {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .tools-grid, .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Utility Classes */
.hidden {
    display: none;
}

.flex {
    display: flex;
}

.flex-column {
    flex-direction: column;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }