/* ===== Utility Hub Styles ===== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 2rem;
}

.main-nav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-link {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s;
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255,255,255,0.2);
    color: white;
}

/* Main Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-radius: var(--radius);
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Tool Cards Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.tool-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 2px solid transparent;
    text-decoration: none;
    color: var(--text);
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.tool-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.tool-card p {
    color: var(--text-light);
    flex-grow: 1;
}

.tool-meta {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Tool Page Styles */
.tool-section {
    background: var(--card);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

.tool-header {
    text-align: center;
    margin-bottom: 30px;
}

.tool-header h1 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.tool-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Input Styles */
.input-group {
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text);
}

.input-field {
    width: 100%;
    padding: 15px 20px;
    font-size: 1.1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 0.3s;
    font-family: inherit;
}

.input-field:focus {
    border-color: var(--primary);
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.4);
}

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

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

/* Results Box */
.results-box {
    background: linear-gradient(135deg, #d1fae5 0%, #dcfce7 100%);
    border-radius: var(--radius);
    padding: 30px;
    margin-top: 30px;
    text-align: center;
    display: none;
}

.results-box.show {
    display: block;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

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

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--success);
}

.result-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Ad Container Styles - Reserved for future use */
.ad-container {
    /* Styles ready for when you add AdSense later */
    display: none; /* Hidden until you add ads */
}

/* Related Tools */
.related-tools {
    margin-top: 50px;
}

.related-tools h2 {
    margin-bottom: 20px;
    color: var(--text);
}

.mini-tools {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.mini-tool {
    background: var(--card);
    border-radius: 8px;
    padding: 15px;
    text-decoration: none;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.mini-tool:hover {
    border-color: var(--primary);
    background: #f8fafc;
}

/* Footer */
.app-footer {
    background: var(--text);
    color: white;
    padding: 40px 20px;
    text-align: center;
    margin-top: 50px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    margin: 20px 0;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    margin: 0 15px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 20px;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .tool-section {
        padding: 25px;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}