/* ============================================
   Professor Dr Anne Bamford OBE Website
   Modern, Accessible, Professional Design
   ============================================ */

/* ============================================
   CSS Reset & Base Styles
   ============================================ */

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

:root {
    /* Colors */
    --color-primary: #1a365d;
    --color-primary-dark: #0f2847;
    --color-accent: #8b5e3c;
    --color-accent-light: #a67c52;
    --color-text: #2d3748;
    --color-text-light: #4a5568;
    --color-text-muted: #718096;
    --color-background: #ffffff;
    --color-background-alt: #f7fafc;
    --color-background-card: #ffffff;
    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;
    
    /* Typography */
    --font-serif: 'Crimson Pro', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Layout */
    --container-width: 1200px;
    --content-width: 800px;
    --border-radius: 0.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08);
    
    /* Transitions */
    --transition: 0.2s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

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

.lead {
    font-size: 1.25rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

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

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ============================================
   Layout
   ============================================ */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

main {
    min-height: calc(100vh - 300px);
}

/* ============================================
   Header & Navigation
   ============================================ */

.site-header {
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.site-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-md);
}

.nav-brand a {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-menu a {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: all var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-accent);
    background-color: var(--color-background-alt);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--transition);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-background);
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        width: 100%;
        padding: var(--spacing-md);
    }
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero-layout {
    max-width: 46rem;
    margin: 0 auto;
}

.hero h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-family: var(--font-serif);
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-description {
    font-size: 1.125rem;
    max-width: 40rem;
    margin: 0 auto var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.portrait-frame {
    float: right;
    width: min(240px, 42%);
    margin: 0 0 var(--spacing-md) var(--spacing-lg);
}

.portrait-frame img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.portrait-frame figcaption {
    margin-top: var(--spacing-xs);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.pull-quote {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-lg) var(--spacing-xl);
    border-left: 4px solid var(--color-accent);
    background: var(--color-background-alt);
    font-family: var(--font-serif);
    font-size: 1.35rem;
    line-height: 1.45;
    color: var(--color-primary);
}

.pull-quote cite {
    display: block;
    margin-top: var(--spacing-sm);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-style: normal;
    color: var(--color-text-muted);
}

.contact-simple {
    max-width: 40rem;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: var(--color-background-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.email-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 600;
    color: var(--color-accent);
    word-break: break-word;
}

.email-link:hover {
    color: var(--color-accent-light);
}

@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-xl) 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .portrait-frame {
        float: none;
        width: min(240px, 70%);
        margin: 0 auto var(--spacing-lg);
    }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-accent-light);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

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

.btn-text {
    color: var(--color-accent);
    font-weight: 600;
    padding: var(--spacing-sm) 0;
}

.btn-text:hover {
    color: var(--color-accent-light);
    transform: translateX(4px);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* ============================================
   Section Layouts
   ============================================ */

section {
    padding: var(--spacing-3xl) 0;
}

.page-header {
    background-color: var(--color-background-alt);
    padding: var(--spacing-2xl) 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
    font-weight: 400;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ============================================
   Highlight Cards
   ============================================ */

.highlights {
    background-color: var(--color-background-alt);
}

.highlight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.highlight-card {
    background-color: var(--color-background-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.highlight-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.highlight-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.highlight-card p {
    color: var(--color-text-light);
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* ============================================
   Work/Research Lists
   ============================================ */

.work-list {
    max-width: var(--content-width);
    margin: 0 auto;
}

.work-item {
    padding: var(--spacing-lg);
    border-left: 3px solid var(--color-accent);
    margin-bottom: var(--spacing-xl);
    background-color: var(--color-background-alt);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.work-item h3 {
    margin-bottom: var(--spacing-sm);
}

.work-meta {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Content Layouts
   ============================================ */

.content-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.content-main {
    max-width: var(--content-width);
}

.content-main::after {
    content: "";
    display: table;
    clear: both;
}

.content-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

@media (max-width: 968px) {
    .content-layout {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Sidebar Components
   ============================================ */

.sidebar-card {
    background-color: var(--color-background-alt);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.sidebar-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.sidebar-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.fact-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.fact-list dt {
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.fact-list dd {
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Lists
   ============================================ */

.styled-list {
    list-style: none;
    padding-left: 0;
}

.styled-list li {
    padding-left: var(--spacing-lg);
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.styled-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

.styled-list.compact li {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

/* ============================================
   Timeline
   ============================================ */

.timeline {
    position: relative;
    padding-left: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-xl);
}

.timeline-marker {
    position: absolute;
    left: -1.625rem;
    top: 0.25rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-accent);
    border: 3px solid var(--color-background);
    box-shadow: 0 0 0 2px var(--color-border);
}

.timeline-content h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.timeline-meta {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Research Grid & Filter
   ============================================ */

.filter-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-background-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    color: var(--color-text);
    transition: all var(--transition);
}

.tab-btn:hover {
    background-color: var(--color-border-light);
}

.tab-btn.active {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.research-card {
    background-color: var(--color-background-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.research-card.hidden {
    display: none;
}

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

.research-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.research-type {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-primary);
    color: white;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.research-year {
    color: var(--color-text-muted);
    font-weight: 600;
}

.research-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.research-publisher {
    font-style: italic;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-background-alt);
    color: var(--color-text);
    border-radius: 3px;
    font-size: 0.8rem;
}

.research-note {
    background-color: var(--color-background-alt);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-accent);
}

/* ============================================
   Contact Page
   ============================================ */

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.contact-method h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.contact-note {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.contact-note-box {
    background-color: var(--color-background-alt);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-xl);
}

.contact-note-box h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.profile-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.profile-links a {
    color: var(--color-accent);
    font-weight: 500;
}

.profile-links a::before {
    content: "→";
    margin-right: var(--spacing-xs);
}

@media (max-width: 968px) {
    .contact-layout {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-info p {
    margin-bottom: 0;
    opacity: 0.9;
}

.footer-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-nav a {
    color: white;
    opacity: 0.9;
    transition: opacity var(--transition);
}

.footer-nav a:hover {
    opacity: 1;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   Accessibility
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .site-header,
    .hero-cta,
    .nav-toggle,
    .filter-tabs,
    .btn,
    .site-footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    h1 {
        font-size: 24pt;
    }
    
    h2 {
        font-size: 18pt;
    }
    
    h3 {
        font-size: 14pt;
    }
}