/* ============================================
   JESPER LINDMARKER — Personal Website
   Lively, professional, with a wink
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;

    --color-bg: #FAFAF8;
    --color-surface: #FFFFFF;
    --color-text: #1a1a1a;
    --color-text-muted: #6b6b6b;
    --color-accent: #E85D3A;
    --color-accent-light: #FFF0EC;
    --color-accent-2: #2D5BFF;
    --color-accent-2-light: #EEF1FF;
    --color-border: #e8e6e1;
    --color-dark: #111111;
    --color-dark-surface: #1a1a1a;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --space-2xl: 10rem;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover { color: var(--color-accent-2); }

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 250, 248, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), background var(--transition);
}
.nav.scrolled {
    border-bottom-color: var(--color-border);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}
.nav-logo:hover { color: var(--color-accent); }

.nav-links {
    list-style: none;
    display: flex;
    gap: var(--space-md);
}
.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition);
}
.nav-links a:hover { color: var(--color-text); }
.nav-links a:hover::after { width: 100%; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: calc(64px + var(--space-lg)) var(--space-md) var(--space-lg);
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(232, 93, 58, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: floatBlob 20s ease-in-out infinite;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(45, 91, 255, 0.04) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: floatBlob 25s ease-in-out infinite reverse;
}

@keyframes floatBlob {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 15px) scale(0.95); }
}

.hero-content {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-xl);
    align-items: center;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-accent);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: var(--space-xs);
}

.hero-name {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.hero-tagline {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    max-width: 540px;
}

.hero-sub {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-md);
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-accent);
    color: white;
}
.btn-primary:hover {
    background: #d14e2d;
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(232, 93, 58, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}
.btn-outline:hover {
    border-color: var(--color-text);
    color: var(--color-text);
    transform: translateY(-1px);
}

.hero-image {
    position: relative;
}
.hero-image img {
    border-radius: var(--radius-lg);
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.hero-image-caption {
    position: absolute;
    bottom: -12px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    background: var(--color-bg);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: fadeInUp 1s 1.5s both;
}
.scroll-indicator span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--color-border);
    position: relative;
    overflow: hidden;
}
.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-accent);
    animation: scrollDown 2s infinite;
}

@keyframes scrollDown {
    0% { top: -100%; }
    100% { top: 100%; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* --- Sections --- */
.section {
    padding: var(--space-2xl) 0;
}

.section-header {
    margin-bottom: var(--space-xl);
}

.section-label {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    position: relative;
    padding-left: 28px;
}
.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 20px;
    height: 1.5px;
    background: var(--color-accent);
}

.section-header h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}
.section-header h2 em {
    color: var(--color-text-muted);
    font-weight: 400;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    max-width: 600px;
}

/* --- Research cards --- */
.research-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.research-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    position: relative;
    transition: all var(--transition);
}
.research-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.06);
    border-color: var(--color-accent);
}

.research-card-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.research-card h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.research-card p {
    color: var(--color-text-muted);
    font-size: 0.925rem;
    margin-bottom: var(--space-xs);
}
.research-card p strong { color: var(--color-text); }
.research-card p em { color: var(--color-text); font-style: italic; }

.research-visual {
    grid-column: span 3;
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
}
.research-visual img {
    width: 100%;
    height: 420px;
    object-fit: cover;
}
.research-funding {
    grid-column: span 3;
    margin-top: var(--space-md);
    padding: var(--space-md) var(--space-md);
    border-left: 3px solid var(--color-accent);
    background: var(--color-accent-light);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.research-funding p {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}
.research-funding a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition);
}
.research-funding a:hover {
    border-bottom-color: var(--color-accent);
}

.image-credit {
    position: absolute;
    bottom: 12px;
    left: 16px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(255,255,255,0.8);
    background: rgba(0,0,0,0.4);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    backdrop-filter: blur(4px);
}

/* --- Papers --- */
.papers {
    background: var(--color-dark);
    color: white;
}
.papers .section-label { color: var(--color-accent); }
.papers .section-label::before { background: var(--color-accent); }
.papers .section-header h2 { color: white; }
.papers .section-header h2 em { color: rgba(255,255,255,0.5); }

.papers-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.paper-item {
    background: var(--color-dark-surface);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: all var(--transition);
}
.paper-item:hover {
    border-color: rgba(255,255,255,0.15);
    background: #222;
}

.paper-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.paper-item h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.paper-subtitle {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
    font-style: italic;
    margin-bottom: var(--space-sm);
}

.paper-authors {
    color: rgba(255,255,255,0.45);
    font-size: 0.85rem;
    margin-bottom: var(--space-sm);
}

.paper-links {
    margin-top: var(--space-sm);
}
.paper-links a {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
    padding: 4px 12px;
    border: 1px solid rgba(232, 93, 58, 0.3);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.paper-links a:hover {
    background: rgba(232, 93, 58, 0.1);
    color: white;
    border-color: var(--color-accent);
}

.paper-abstract {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), padding 0.5s;
}
.paper-abstract.open {
    max-height: 500px;
    padding-top: var(--space-sm);
}

.paper-abstract p {
    color: rgba(255,255,255,0.65);
    font-size: 0.9rem;
    line-height: 1.8;
}

.paper-toggle {
    background: none;
    border: none;
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    cursor: pointer;
    padding: 4px 0;
    margin-top: var(--space-xs);
    transition: color var(--transition);
}
.paper-toggle:hover { color: white; }
.paper-toggle[aria-expanded="true"]::after { content: ' ↑'; }
.paper-toggle[aria-expanded="false"]::after { content: ' ↓'; }

.papers-note {
    background: var(--color-dark-surface);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    padding: var(--space-md);
}
.papers-note h4 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}
.papers-note p {
    color: rgba(255,255,255,0.65);
    font-size: 0.9rem;
}
.papers-note a { color: var(--color-accent); }
.papers-note a:hover { color: white; }

/* --- Timeline / History --- */
.timeline {
    position: relative;
    padding-left: 40px;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 8px;
    bottom: 8px;
    width: 1.5px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-xl);
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
    position: absolute;
    left: -40px;
    top: 8px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2px solid var(--color-accent);
    z-index: 1;
    transition: all var(--transition);
}
.timeline-item:hover .timeline-marker {
    background: var(--color-accent);
    transform: scale(1.3);
}

/* Upcoming timeline items */
.timeline-upcoming {
    opacity: 0.7;
}
.timeline-upcoming .timeline-marker {
    border-style: dashed;
    background: transparent;
}
.timeline-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    background: var(--color-border);
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 0.5rem;
    vertical-align: middle;
}
.timeline-divider {
    position: relative;
    display: flex;
    align-items: center;
    margin: var(--space-sm) 0;
}
.timeline-divider span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    font-weight: 500;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
    letter-spacing: 0.02em;
}

.timeline-content h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 2px;
    letter-spacing: -0.01em;
}

.timeline-org {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    font-style: italic;
}

.timeline-content p {
    color: var(--color-text-muted);
    font-size: 0.925rem;
    margin-bottom: var(--space-xs);
}

.timeline-aside {
    font-style: italic;
    color: var(--color-accent) !important;
    font-size: 0.9rem !important;
}

.timeline-image {
    margin-top: var(--space-sm);
    border-radius: var(--radius-md);
    max-height: 440px;
    object-fit: cover;
    width: 100%;
    box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

/* --- Teaching --- */
.teaching {
    background: linear-gradient(180deg, var(--color-bg) 0%, #f2f1ed 100%);
}

.teaching-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.timeline-map {
    margin-top: var(--space-sm);
    border-radius: var(--radius-md);
    width: 100%;
    height: 500px;
    border: 1px solid var(--color-border);
    box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

.teaching-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: all var(--transition);
    color: var(--color-text);
    text-decoration: none;
}
.teaching-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.06);
    border-color: var(--color-accent);
    color: var(--color-text);
}

.teaching-card-week {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.teaching-card h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.teaching-card p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* --- Contact --- */
.contact {
    background: var(--color-dark);
    color: white;
}

.contact-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.contact .section-label { color: var(--color-accent); }
.contact .section-label::before { background: var(--color-accent); }

.contact-text h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-sm);
}

.contact-text p {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    line-height: 1.7;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact-link {
    display: flex;
    flex-direction: column;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-dark-surface);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}
.contact-link:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
    color: white;
}

.contact-link-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.contact-link-value {
    color: rgba(255,255,255,0.85);
    font-size: 0.95rem;
    margin-top: 2px;
}

/* --- Footer --- */
.footer {
    background: var(--color-dark);
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: var(--space-md) 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255,255,255,0.35);
    font-size: 0.8rem;
}

.footer-note {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.03em;
}

/* --- Scroll animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 960px) {
    .research-grid { grid-template-columns: 1fr 1fr; }
    .research-visual { grid-column: span 2; }
    .research-card:nth-child(3) { grid-column: span 2; }
    .research-funding { grid-column: span 2; }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(250, 250, 248, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-md);
        gap: var(--space-sm);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
    }
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    .hero-image { order: -1; max-width: 300px; margin: 0 auto; }

    .research-grid { grid-template-columns: 1fr; }
    .research-visual { grid-column: 1; }
    .research-card:nth-child(3) { grid-column: 1; }
    .research-funding { grid-column: 1; }

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

    .contact-inner { grid-template-columns: 1fr; gap: var(--space-lg); }

    .hero-name { font-size: clamp(2.5rem, 10vw, 4rem); }

    .timeline { padding-left: 30px; }
    .timeline-marker { left: -30px; }

    .footer-inner { flex-direction: column; gap: var(--space-xs); text-align: center; }
}

@media (max-width: 480px) {
    .hero-cta { flex-direction: column; }
    .btn { text-align: center; justify-content: center; }
}