/* ==========================================================================
   David Dabney — Application to Anthropic
   Simple, intentional, confident.
   ========================================================================== */

:root {
    --forest-green: #2D5A3D;
    --forest-green-light: #3d7a52;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --background: #fefefe;
    --background-alt: #f8f8f6;
    --border: #e0e0e0;

    --font-body: 'Literata', Georgia, serif;
    --max-width: 680px;
    --spacing-unit: 1.5rem;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 18px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--background);
    -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
    position: sticky;
    top: 0;
    background: var(--background);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    padding: 1rem 2rem;
}

.nav-tabs {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    gap: 2rem;
}

.nav-tab {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: none;
    border: none;
    padding: 0.5rem 0;
    cursor: pointer;
    position: relative;
    transition: color 0.2s ease;
}

.nav-tab:hover {
    color: var(--forest-green);
}

.nav-tab.active {
    color: var(--forest-green);
}

.nav-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--forest-green);
}

/* Main Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.letter {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 4rem 2rem 6rem;
}

/* Header */
.letter-header {
    margin-bottom: 4rem;
}

.letter-header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin: 0 0 1.5rem 0;
    color: var(--text-primary);
}

.intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Sections */
.letter-section {
    margin-bottom: 4rem;
}

.letter-section h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--forest-green);
    margin: 0 0 1.5rem 0;
}

.letter-section p {
    margin: 0 0 1rem 0;
}

.letter-section.closing {
    margin-top: 5rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border);
}

/* Links */
a {
    color: var(--forest-green);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--forest-green-light);
}

.download-link {
    font-weight: 500;
}

/* Document List */
.document-list {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0 0;
}

.document-list li {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border);
}

.document-list li:first-child {
    border-top: 1px solid var(--border);
}

.document-list .download-link {
    display: block;
    margin-bottom: 0.35rem;
}

.doc-description {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.placeholder {
    color: var(--text-secondary);
    font-style: italic;
}

/* PDF Viewer */
.pdf-container {
    margin: 2rem 0;
    background: var(--background-alt);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.pdf-viewer {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
}

.pdf-canvas {
    max-width: 100%;
    height: auto;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    background: white;
}

.pdf-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pdf-btn {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--forest-green);
    background: white;
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pdf-btn:hover {
    background: var(--forest-green);
    color: white;
    border-color: var(--forest-green);
}

.pdf-error {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Presentation Photos */
.presentation-photos {
    margin: 2rem 0;
}

.photo-gallery {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.photo-gallery img {
    width: calc(50% - 0.5rem);
    height: auto;
    border: 1px solid var(--border);
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.photo-caption {
    font-style: italic;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 1rem;
}

/* Responsive */
@media (max-width: 600px) {
    html {
        font-size: 16px;
    }

    .letter {
        padding: 3rem 1.25rem 4rem;
    }

    .letter-header h1 {
        font-size: 2rem;
    }

    .nav {
        padding: 0.75rem 1.25rem;
    }

    .nav-tabs {
        gap: 1.5rem;
    }

    .pdf-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Print styles */
@media print {
    .nav {
        display: none;
    }

    .letter {
        padding: 0;
    }

    .pdf-container {
        display: none;
    }

    a::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: var(--text-secondary);
    }
}