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

@font-face {
    font-family: 'Iowan Old Style';
    src: url('https://thinkingmachines.ai/fonts/iowan-old-style-bt-roman.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Iowan Old Style';
    src: url('https://thinkingmachines.ai/fonts/iowan-old-style-bt-italic.woff2') format('woff2');
    font-weight: normal;
    font-style: italic;
    font-display: swap;
}

:root {
    --color-text: #474747;
    --color-accent: #1CCBD6;
    --color-border: #CCCCCC;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F2F2F2;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --max-width: 800px;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-serif: 'Iowan Old Style', Georgia, 'Times New Roman', serif;
}

/* Typography */
html {
    font-size: 17px;
    line-height: 1.5;
}

body {
    font-family: var(--font-serif);
    color: var(--color-text);
    background-color: var(--color-bg);
    padding: 0;
    font-weight: 400;
}

h1 {
    font-family: var(--font-sans);
    font-size: clamp(2.5rem, 6vw, 3rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h2 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: normal;
    letter-spacing: 0;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

h3 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: normal;
    font-style: italic;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0;
    line-height: 1.4;
}

h4 {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: normal;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    letter-spacing: 0;
    line-height: 1.4;
}

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

a {
    color: var(--color-text);
    text-decoration: underline;
    transition: color 0.2s ease;
}

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

/* Layout */
header {
    text-align: center;
    background-color: var(--color-bg);
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-sm) var(--spacing-md);
}

.subtitle {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 400;
    letter-spacing: 0;
    margin-top: var(--spacing-sm);
}

nav {
    text-align: center;
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

nav a {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    letter-spacing: -0.01em;
    font-weight: 500;
    color: var(--color-text);
    transition: all 0.2s ease;
}

nav a:hover {
    border-color: var(--color-accent);
    background-color: var(--color-bg-alt);
}

nav a.active {
    background-color: var(--color-bg-alt);
    border-color: var(--color-text);
    color: var(--color-text);
    font-weight: 600;
}

main {
    max-width: var(--max-width);
    margin: 0 auto;
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
}

section {
    margin-bottom: var(--spacing-xl);
}

section:last-child {
    margin-bottom: 0;
}

/* Lists */
ul {
    list-style-position: outside;
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: var(--spacing-xs);
}

/* Articles */
article {
    margin-bottom: var(--spacing-lg);
}

article:last-child {
    margin-bottom: 0;
}

/* Contact Page */
.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    transition: all 0.2s ease;
}

.contact-btn:hover {
    border-color: var(--color-accent);
    background-color: var(--color-bg-alt);
}

.contact-btn svg {
    fill: currentColor;
}

.contact-form {
    margin-top: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-family: var(--font-sans);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--color-text);
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.submit-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--color-text);
    color: var(--color-bg);
    border: none;
    border-radius: 0.375rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.submit-btn:hover {
    background-color: var(--color-accent);
    color: var(--color-text);
}

/* About Page Grid */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 2fr 1fr;
    }
}

.sidebar {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 0.375rem;
}

.sidebar h3 {
    margin-top: 0;
}

.sidebar ul {
    list-style: none;
    margin-left: 0;
}

.sidebar li {
    margin-bottom: var(--spacing-sm);
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--color-text);
}

.footer-note {
    font-size: 0.75rem;
    color: #B3B3B3;
    margin-top: var(--spacing-xs);
}

/* Responsive Design */
@media (max-width: 768px) {
    html {
        font-size: 16px;
    }

    body {
        padding: var(--spacing-sm);
    }

    header {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    h1 {
        font-size: 2rem;
    }

    main {
        padding: var(--spacing-md);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}