:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #6366f1;
    --text: #1f2937;
    --text-light: #6b7280;
    --background: #f9fafb;
    --white: #ffffff;
}

/* Dark mode variables */
[data-theme="dark"] {
    --primary: #818cf8;
    --primary-dark: #6366f1;
    --secondary: #a5b4fc;
    --text: #f9fafb;
    --text-light: #d1d5db;
    --background: #111827;
    --white: #1f2937;
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text);
    background-color: var(--background);
    transition: background-color 0.3s, color 0.3s;
}

/* Header Styles */
.header {
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.8);
    transition: background-color 0.3s;
}

[data-theme="dark"] .header {
    background-color: rgba(31, 41, 55, 0.8);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background-color: var(--primary);
    color: var(--white);
}

/* Dark Mode Toggle */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.5rem;
    color: var(--text);
}

/* Main Content */
.main-content {
    margin-top: 80px;
    padding: 2rem;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

/* Cards */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.tool-card {
    background-color: var(--white);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.tool-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Feature Cards */
.feature-card {
    background-color: var(--white);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: scale(1.05);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-secondary:hover {
    background-color: var(--primary);
    color: var(--white);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 0.5rem;
    background-color: var(--white);
    color: var(--text);
}

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

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

/* Dashboard */
.dashboard {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
}

.sidebar {
    background-color: var(--background);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.favorites {
    margin-top: 2rem;
}

.favorites-list {
    list-style: none;
    padding: 0;
}

.favorites-item {
    padding: 0.5rem;
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    cursor: pointer;
}

.favorites-item:hover {
    background-color: var(--text-light);
}

/* Dark Mode */
[data-theme="dark"] .feature-card,
[data-theme="dark"] .tool-card {
    background-color: var(--white);
    border: 1px solid #374151;
}

[data-theme="dark"] .btn-secondary {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: var(--primary);
    color: var(--white);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--background);
        padding: 1rem;
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease-in;
}

/* API Configuration Styles */
.api-config {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.api-form {
    display: grid;
    gap: 1.5rem;
}