:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-text: #1a1a2e;
    --color-text-secondary: #555;
    --color-accent: #2563eb;
    --color-accent-light: #eff6ff;
    --color-border: #e5e7eb;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 960px;
    --radius: 12px;
}

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

body {
    font-family: var(--font);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem 1.5rem 0;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.logo span {
    color: var(--color-accent);
}

/* Hero */
.hero {
    padding-bottom: 4rem;
    background: var(--color-bg);
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 5rem 1.5rem 0;
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    max-width: 600px;
}

.hero-sub {
    margin-top: 1rem;
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 480px;
}

/* Tools */
.tools {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.tools h2 {
    font-size: 1.125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.tool-card {
    display: flex;
    flex-direction: column;
    padding: 1.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

a.tool-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
}

.tool-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.tool-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.tool-card p {
    font-size: 0.938rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    flex-grow: 1;
}

.tool-link {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent);
}

.tool-card--soon {
    background: var(--color-bg-alt);
    border-style: dashed;
}

.tool-badge {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-border);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
}

/* About */
.about {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 3rem 1.5rem 4rem;
    border-top: 1px solid var(--color-border);
}

.about h2 {
    font-size: 1.125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.about p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 640px;
    line-height: 1.7;
}

/* Footer */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem 1.5rem;
    margin-top: 2rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-brand {
    font-weight: 600;
    font-size: 0.938rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-copy {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* Mobile */
@media (max-width: 600px) {
    .hero-content {
        padding-top: 3rem;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}