@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@500;700;800;900&display=swap');

:root {
    /* Color Palette */
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --text-main: #111827;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Others */
    --border-radius: 12px;
    --box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
}

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

ul {
    list-style-position: inside;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-content {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

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

/* Navigation */
.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

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

.brand {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary-color);
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    font-weight: 500;
    color: var(--text-muted);
}

.nav-links auto {
    color: var(--text-muted);
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Mobile Nav Adjustments */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple responsive fix: typically a hamburger menu is better, but since it's 3 links we could just wrap them */
    }
    .navbar .container {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        font-size: 0.9rem;
    }
}

/* Footer */
.footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
}

.footer-text {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-links a:hover {
    text-decoration: underline;
    color: var(--primary-color);
}

/* Cards & Components */
.card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.page-header {
    margin-bottom: var(--spacing-xl);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
}

/* Forms & Inputs */
.input-group {
    margin-bottom: var(--spacing-md);
}

.label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-main);
}

.textarea, .input, .select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    outline: none;
    color: var(--text-main);
    background-color: var(--bg-card);
}

.textarea {
    resize: vertical;
    min-height: 150px;
    line-height: 1.5;
}

.textarea:focus, .input:focus, .select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    border: none;
    transition: all var(--transition-speed) ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 8px -1px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
    background-color: #f1f5f9;
    color: #475569;
}

.btn-secondary:hover {
    background-color: #e2e8f0;
}

.btn-danger {
    background-color: #fee2e2;
    color: #ef4444;
}

.btn-danger:hover {
    background-color: #fca5a5;
    color: #b91c1c;
}

.hidden {
    display: none !important;
}

/* Specific tool styles: Word Counter */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

@media (min-width: 640px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-box {
    background-color: var(--primary-light);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    text-align: center;
    transition: transform var(--transition-speed) ease;
}

.stat-box:hover {
    transform: translateY(-2px);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
    color: var(--primary-color);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: #6366f1; /* lighter primary */
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Specific tool styles: JSON Parser */
.json-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .json-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.json-output {
    height: 400px;
    overflow: auto;
    background-color: #f8fafc;
    font-family: 'Courier New', Courier, monospace;
    white-space: pre;
    color: #166534; /* Green */
}

.json-output.error {
    color: #b91c1c; /* Red */
}

.json-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-md);
}

.error-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: #fee2e2;
    color: #b91c1c;
    border-radius: var(--border-radius);
    text-align: center;
}

/* Specific tool styles: AI Prompt Improver */
.prompt-area {
    position: relative;
    margin-top: var(--spacing-md);
}

.prompt-area textarea {
    background-color: var(--primary-light);
    border-color: #c7d2fe;
    color: #1e3a8a;
    font-weight: 500;
}

.btn-copy {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: white;
    border: 1px solid var(--border-color);
    padding: 4px 12px;
    font-size: 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s;
}

.btn-copy:hover {
    background-color: #f8fafc;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* Prose/Article content for SEO block */
.prose {
    max-width: 65ch;
    margin: 0 auto;
    color: var(--text-main);
    padding: var(--spacing-xl) 0;
}

.prose h2, .prose h3 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

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

.prose ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}