/* ============================================================
   Paul H. Décaire — Academic Website Stylesheet
   Aesthetic: Refined editorial, warm & authoritative
   ============================================================ */

:root {
    --color-ink: #1a1a2e;
    --color-ink-light: #3d3d5c;
    --color-ink-muted: #6b6b8a;
    --color-cream: #faf8f5;
    --color-warm-white: #fdfcfa;
    --color-sand: #f0ebe4;
    --color-sand-dark: #e2dbd0;
    --color-accent: #8b2c2c;
    --color-accent-hover: #a63636;
    --color-gold: #b8860b;
    --color-green-muted: #2d6a4f;
    --color-blue-muted: #1e4d7a;
    --font-display: 'Cormorant Garamond', 'Georgia', serif;
    --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
    --max-width: 820px;
    --nav-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-ink);
    background: var(--color-cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: var(--color-accent-hover);
}

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

/* ---- NAVIGATION ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-cream);
    z-index: 100;
    transition: box-shadow 0.3s ease, background 0.3s ease;
}
.nav.scrolled {
    box-shadow: 0 1px 12px rgba(26, 26, 46, 0.08);
    background: rgba(250, 248, 245, 0.97);
    backdrop-filter: blur(8px);
}
.nav-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: 0.01em;
}
.nav-name:hover { color: var(--color-accent); }
.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}
.nav-links a {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-ink-muted);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 2px;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--color-ink);
}
.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}
.nav-toggle { display: none; }

/* ---- HERO (Home) ---- */
.hero {
    padding-top: calc(var(--nav-height) + 4rem);
    padding-bottom: 3rem;
    background: var(--color-cream);
}
.hero-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: flex-start;
    gap: 3rem;
}
.hero-photo {
    flex-shrink: 0;
    width: 200px;
    height: 240px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--color-sand);
    border: 1px solid var(--color-sand-dark);
}
.hero-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hero-text {
    padding-top: 0.5rem;
}
.hero-text h1 {
    font-family: var(--font-display);
    font-size: 2.6rem;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.15;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}
.hero-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-ink-light);
    margin-bottom: 0.25rem;
}
.hero-affiliation {
    font-size: 0.95rem;
    color: var(--color-ink-muted);
    line-height: 1.6;
}

/* ---- PAGE HEADER (Research) ---- */
.page-header {
    padding-top: calc(var(--nav-height) + 3.5rem);
    padding-bottom: 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding-left: 2rem;
    padding-right: 2rem;
}
.page-header h1 {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: -0.01em;
}

/* ---- MAIN CONTENT ---- */
.content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem 4rem;
}

/* ---- SECTION LABELS ---- */
.section-label {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-ink-muted);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-sand-dark);
}

/* ---- ABOUT SECTION ---- */
.about { margin-bottom: 3rem; }
.about-body p {
    color: var(--color-ink-light);
    margin-bottom: 1rem;
    font-size: 1.02rem;
}
.research-themes {
    margin: 0.75rem 0 1rem 1.25rem;
    color: var(--color-ink-light);
}
.research-themes li {
    margin-bottom: 0.4rem;
    padding-left: 0.3rem;
}

/* ---- CONTACT SECTION ---- */
.contact { margin-bottom: 3rem; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.contact-label {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-ink-muted);
}
.contact-item a {
    font-size: 1rem;
    font-weight: 500;
}

.profiles {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}
.profile-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border: 1px solid var(--color-sand-dark);
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-ink-light);
    background: var(--color-warm-white);
    transition: all 0.2s ease;
}
.profile-link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: #fff;
    box-shadow: 0 2px 8px rgba(139, 44, 44, 0.08);
}
.profile-link svg {
    flex-shrink: 0;
}

/* ---- HIGHLIGHTS / SELECTED RESEARCH ---- */
.highlights { margin-bottom: 2rem; }
.highlights-body {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}
.highlight-card {
    padding: 1.25rem 1.5rem;
    background: var(--color-warm-white);
    border: 1px solid var(--color-sand-dark);
    border-radius: 6px;
    border-left: 3px solid var(--color-accent);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.highlight-card:hover {
    box-shadow: 0 4px 16px rgba(26, 26, 46, 0.06);
    transform: translateY(-1px);
}
.highlight-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.4rem;
}
.highlight-card h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 0.25rem;
}
.highlight-card h3 a {
    color: var(--color-ink);
}
.highlight-card h3 a:hover {
    color: var(--color-accent);
}
.highlight-authors {
    font-size: 0.9rem;
    color: var(--color-ink-muted);
}
.highlight-awards {
    font-size: 0.8rem;
    color: var(--color-gold);
    font-weight: 500;
    margin-top: 0.35rem;
}
.view-all {
    display: inline-block;
    margin-top: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
}

/* ---- RESEARCH PAGE: PAPERS ---- */
.paper-section {
    margin-bottom: 3.5rem;
}
.papers {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}
.paper {
    padding: 1.5rem 1.75rem;
    background: var(--color-warm-white);
    border: 1px solid var(--color-sand-dark);
    border-radius: 6px;
    transition: box-shadow 0.2s ease;
}
.paper:hover {
    box-shadow: 0 3px 14px rgba(26, 26, 46, 0.06);
}
.paper-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.6rem;
    flex-wrap: wrap;
}
.paper-venue {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-ink-muted);
}
.paper-status {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.2rem 0.6rem;
    border-radius: 3px;
    background: var(--color-sand);
    color: var(--color-ink-muted);
}
.paper-status.forthcoming {
    background: #e8f5e9;
    color: var(--color-green-muted);
}
.paper-status.published {
    background: #e3f0fa;
    color: var(--color-blue-muted);
}
.paper-status.rr {
    background: #fff3e0;
    color: #b8730e;
}
.paper-status.new {
    background: #fce4ec;
    color: var(--color-accent);
}
.paper-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 0.35rem;
}
.paper-title a {
    color: var(--color-ink);
}
.paper-title a:hover {
    color: var(--color-accent);
}
.paper-authors {
    font-size: 0.92rem;
    color: var(--color-ink-muted);
    margin-bottom: 0.3rem;
}
.paper-note {
    font-size: 0.85rem;
    color: var(--color-ink-muted);
    font-style: italic;
    margin-bottom: 0.3rem;
}
.paper-links {
    margin-bottom: 0.5rem;
}
.paper-links a {
    font-size: 0.85rem;
    font-weight: 600;
}
.paper-awards {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    margin-top: 0.4rem;
}
.award {
    font-size: 0.8rem;
    color: var(--color-gold);
    font-weight: 500;
}
.award::before {
    content: '★ ';
    font-size: 0.7rem;
}

/* Abstract toggle */
.paper-abstract {
    margin-top: 0.75rem;
    border-top: 1px solid var(--color-sand);
    padding-top: 0.75rem;
}
.paper-abstract summary {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-ink-muted);
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
}
.paper-abstract summary:hover {
    color: var(--color-accent);
}
.paper-abstract p {
    margin-top: 0.6rem;
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--color-ink-light);
}

.paper-resting {
    opacity: 0.7;
    border-left: 3px solid var(--color-sand-dark);
}

/* ---- FOOTER ---- */
.footer {
    border-top: 1px solid var(--color-sand-dark);
    padding: 2rem 0;
    background: var(--color-cream);
}
.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}
.footer p {
    font-size: 0.82rem;
    color: var(--color-ink-muted);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 700px) {
    .hero-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1.5rem;
    }
    .hero-photo {
        width: 160px;
        height: 200px;
    }
    .hero-text h1 {
        font-size: 2rem;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .profiles {
        justify-content: center;
    }
    .nav-toggle {
        display: flex;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
    }
    .nav-toggle span {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--color-ink);
        border-radius: 2px;
        transition: 0.2s;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--color-cream);
        flex-direction: column;
        padding: 1rem 2rem 1.5rem;
        gap: 1rem;
        box-shadow: 0 4px 16px rgba(0,0,0,0.06);
    }
    .nav-links.open {
        display: flex;
    }
    .page-header h1 { font-size: 2.2rem; }
    .paper { padding: 1.25rem; }
    .paper-title { font-size: 1.15rem; }
    .highlight-card { padding: 1rem 1.25rem; }
}

/* ---- ANIMATIONS ---- */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.hero-photo,
.hero-text,
.about,
.contact,
.highlights,
.paper-section {
    animation: fadeUp 0.6s ease both;
}
.hero-text       { animation-delay: 0.1s; }
.about           { animation-delay: 0.15s; }
.contact         { animation-delay: 0.2s; }
.highlights      { animation-delay: 0.25s; }

/* Print styles */
@media print {
    .nav, .nav-toggle { display: none; }
    .hero { padding-top: 1rem; }
    .paper-abstract { display: block; }
    .paper-abstract summary { display: none; }
    a { color: inherit; }
}

/* Upcoming Conferences */
.conferences-body {
    max-width: 38rem;
}

.conference-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
}

.conference-list li {
    padding: 0.45rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.95rem;
}

.conf-note {
    color: #888;
    font-size: 0.85em;
    margin-left: 0.25rem;
}

.conf-legend {
    font-size: 0.85rem;
    color: #888;
    margin-top: 0.5rem;
    font-family: 'Source Sans 3', sans-serif;
}