/* Hub Styles - Enhanced Design System */
@font-face {
    font-family: 'Inter';
    src: url('https://fonts.gstatic.com/s/inter/v13/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuLyfAZ9hjp-Ek-_EeA.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #64748b;
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #0f172a;
    --text-light: #64748b;
    --border: #e2e8f0;
    --success: #10b981;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
    --bg: #0f172a;
    --surface: #1e293b;
    --text: #f8fafc;
    --text-light: #cbd5e1;
    --border: #334155;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] header {
    background: rgba(30, 41, 59, 0.95);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s;
}

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

/* Hero */
.hero {
    text-align: center;
    padding: 5rem 0 4rem;
    background: transparent;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 0 0 1.25rem;
    letter-spacing: -0.04em;
    line-height: 1.1;
    color: var(--text);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 580px;
    margin: 0 auto;
    font-weight: 400;
}

/* Tools Grid */
.tools-section {
    padding: 4rem 0;
}

.section-title {
    text-align: left;
    margin-bottom: 2.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
    height: 100%;
    box-sizing: border-box;
}

.tool-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.tool-icon {
    width: 48px;
    height: 48px;
    background: var(--bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--text);
    border: 1px solid var(--border);
}

.tool-card:hover .tool-icon {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.tool-icon svg { width: 24px; height: 24px; }

.tool-card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
}

.tool-card p {
    color: var(--text-light);
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.5;
    flex: 1;
}

.tool-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-light);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    letter-spacing: 0.02em;
}

/* Footer */
footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 3rem 0;
    margin-top: auto;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer-links {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .nav-links { display: none; }
    .container { padding: 0 1.5rem; }
}

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

.tools-grid {
    animation: fadeIn 0.6s ease-out;
}