/* =========================================================
   Louis Carillo — shared site styles
   Colour scheme carried over from the original single-page site
   ========================================================= */

:root {
    --bg: #f4f0f9;
    --white: #ffffff;
    --text: #333333;
    --text-light: #6b6b78;
    --purple-dark: #4b3f72;
    --purple: #6a5fa4;
    --purple-light: #8f85c2;
    --lavender: #ded6f7;
    --border: #e4defa;
    --shadow: 0 4px 20px rgba(75, 63, 114, 0.08);
    --shadow-hover: 0 10px 30px rgba(75, 63, 114, 0.16);
    --radius: 14px;
    --max-width: 1100px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--purple-dark); text-decoration: none; }
a:hover { color: var(--purple); }

img { max-width: 100%; }

/* ---------- Navigation ---------- */

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-weight: 700;
    font-size: 19px;
    color: var(--purple-dark);
    letter-spacing: -0.2px;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.nav-links a svg { width: 15px; height: 15px; flex-shrink: 0; }

.nav-links a:hover {
    background-color: var(--bg);
    color: var(--purple-dark);
}

.nav-links a.active {
    color: var(--purple-dark);
    background-color: var(--lavender);
}

.nav-links a.nav-cta {
    background-color: transparent;
    border: 1.5px solid var(--purple-dark);
    color: var(--purple-dark);
    margin-left: 8px;
}

.nav-links a.nav-cta:hover {
    background-color: var(--purple-dark);
    color: var(--white);
}

.nav-links a.nav-cta.active {
    background-color: var(--purple-dark);
    border-color: var(--purple-dark);
    color: var(--white);
}

.nav-toggle,
.nav-hamburger { display: none; }

/* ---------- Page banner (non-home pages) ---------- */

.page-banner {
    background: linear-gradient(135deg, var(--purple-dark), var(--purple));
    color: var(--white);
    text-align: center;
    padding: 56px 24px 46px;
}

.page-banner h1 {
    margin: 0 0 8px;
    font-size: 38px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.page-banner p {
    margin: 0;
    font-size: 17px;
    color: var(--lavender);
    opacity: 0.95;
}

/* ---------- Hero (home page) ---------- */

.hero {
    background: linear-gradient(135deg, var(--purple-dark), var(--purple));
    color: var(--white);
    text-align: center;
    padding: 64px 24px 56px;
}

.hero-photo {
    width: 128px;
    height: 128px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255, 255, 255, 0.85);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    margin-bottom: 22px;
}

.hero h1 {
    margin: 0 0 6px;
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.hero .hero-title {
    font-size: 19px;
    font-weight: 500;
    color: var(--lavender);
    margin: 0 0 6px;
}

.hero .hero-sub {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    margin: 0 0 26px;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.icon-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    border-radius: 24px;
    border: 1.5px solid rgba(255, 255, 255, 0.55);
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.icon-link:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--white);
    color: var(--white);
    transform: translateY(-1px);
}

.icon-link.filled {
    background-color: var(--white);
    color: var(--purple-dark);
    border-color: var(--white);
}

.icon-link.filled:hover {
    background-color: var(--lavender);
    color: var(--purple-dark);
}

.icon-link svg { width: 16px; height: 16px; flex-shrink: 0; }

/* ---------- Layout wrapper ---------- */

.wrap {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 50px 24px 70px;
}

/* ---------- Section headings ---------- */

.section-heading {
    font-size: 26px;
    color: var(--purple-dark);
    margin: 0 0 26px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.section { margin-bottom: 50px; }

/* ---------- Cards (generic) ---------- */

.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px 32px;
}

/* ---------- Research interests (home) ---------- */

.research-intro {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 34px 38px;
    margin-bottom: 26px;
}

.research-intro p { margin: 0 0 16px; color: var(--text); }
.research-intro p:last-child { margin-bottom: 0; }

.research-figure {
    display: block;
    margin: 24px auto 4px;
    max-width: 420px;
    border-radius: 10px;
}

.research-topics {
    list-style: none;
    padding: 0;
    margin: 20px 0 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.research-topics li {
    background: var(--bg);
    border-left: 3px solid var(--purple);
    border-radius: 8px;
    padding: 14px 16px;
    font-size: 14.5px;
}

.research-topics strong { color: var(--purple-dark); }

/* ---------- Entry list (publications / talks / teaching) ---------- */

.entry {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px 28px;
    margin-bottom: 16px;
    border-left: 4px solid var(--purple);
    transition: box-shadow 0.18s ease, transform 0.18s ease;
}

.entry:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.entry h3 {
    margin: 0 0 6px;
    font-size: 17px;
    color: var(--purple-dark);
    font-weight: 700;
}

.entry .meta {
    font-size: 14px;
    color: var(--text-light);
    font-style: italic;
    margin: 0 0 10px;
}

.entry .details {
    font-size: 14px;
    color: var(--text);
    margin: 0 0 8px;
}

.entry .links { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; }

.entry .links a {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--purple);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.entry .links a:hover { color: var(--purple-dark); }
.entry .links svg { width: 14px; height: 14px; }

.tag {
    display: inline-block;
    font-size: 11.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--purple-dark);
    background: var(--lavender);
    padding: 3px 9px;
    border-radius: 20px;
    margin-bottom: 8px;
}

/* ---------- Talks: one-line header (name left, place/date right) ---------- */

.entry-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 4px;
}

.entry-row h3 { margin: 0; flex: 1 1 auto; }

.entry-row .entry-meta {
    white-space: nowrap;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-light);
    flex-shrink: 0;
}

.web-icon {
    display: inline-flex;
    align-items: center;
    position: relative;
    top: -2px;
    margin-left: 7px;
    color: var(--purple);
}

.web-icon:hover { color: var(--purple-dark); }
.web-icon svg { width: 15px; height: 15px; }

.badges { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0; }

.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    padding: 4px 10px;
    border-radius: 20px;
}

.badge svg { width: 11px; height: 11px; }

.badge-talk { background: var(--purple-dark); color: var(--white); }
.badge-poster { background: var(--purple); color: var(--white); }
.badge-organiser { background: var(--lavender); color: var(--purple-dark); border: 1px solid var(--purple-light); }

/* ---------- Abstract toggle ---------- */

.abstract { margin-top: 12px; }

.abstract summary {
    cursor: pointer;
    list-style: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--purple-dark);
    background: var(--lavender);
    padding: 7px 14px;
    border-radius: 20px;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.abstract summary::-webkit-details-marker { display: none; }
.abstract summary::marker { content: ""; }

.abstract summary:hover { background: var(--purple-light); color: var(--white); }
.abstract[open] summary { background: var(--purple-dark); color: var(--white); }

.abstract summary svg { width: 12px; height: 12px; transition: transform 0.2s ease; }
.abstract[open] summary svg { transform: rotate(180deg); }

.abstract p {
    margin: 12px 0 0;
    font-size: 14px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    padding: 14px 18px;
    border-radius: 10px;
}

/* ---------- Teaching combined list ---------- */

.teaching-list {
    margin: 10px 0 0;
    padding-left: 20px;
}

.teaching-list li {
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--text);
}

.teaching-list li:last-child { margin-bottom: 0; }
.teaching-list strong { color: var(--purple-dark); }

/* ---------- Beyond the Lab (resume misc box) ---------- */

.hobby-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 14px;
}

.hobby {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--purple-dark);
}

/* ---------- Resume page ---------- */

.resume-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 24px;
    align-items: start;
}

.resume-sidebar {
    background: linear-gradient(180deg, var(--purple-dark), var(--purple));
    color: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px 24px;
    position: sticky;
    top: 90px;
}

.resume-sidebar .profile-pic {
    text-align: center;
    margin-bottom: 22px;
}

.resume-sidebar .profile-pic img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.85);
}

.resume-sidebar .side-title {
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--lavender);
    margin: 26px 0 12px;
    text-align: center;
}

.resume-sidebar .side-title:first-of-type { margin-top: 0; }

.resume-sidebar .contact-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.resume-sidebar .contact-list a {
    color: var(--white);
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.resume-sidebar .contact-list a:hover { color: var(--lavender); }

.skills-list, .links-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 14px;
}

.skills-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.skills-list img { width: 26px; height: 26px; }

.languages-row {
    display: flex;
    justify-content: center;
    gap: 12px;
    font-size: 26px;
}

.links-list li { width: 100%; }

.links-list a {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 13.5px;
    justify-content: center;
    text-align: center;
    color: var(--white);
    background: rgba(255, 255, 255, 0.12);
    padding: 9px 12px;
    border-radius: 8px;
    transition: background-color 0.15s ease;
}

.links-list a:hover { background: rgba(255, 255, 255, 0.24); color: var(--white); }
.links-list img { width: 20px; height: 20px; }

.resume-download {
    display: block;
    text-align: center;
    background: var(--white);
    color: var(--purple-dark) !important;
    font-weight: 700;
    padding: 11px;
    border-radius: 8px;
    margin-top: 24px;
    font-size: 14px;
}

.resume-download:hover { background: var(--lavender); }

.resume-main .entry { border-left: 4px solid var(--purple); }

/* ---------- Footer ---------- */

.site-footer {
    text-align: center;
    padding: 28px 24px;
    font-size: 13px;
    color: var(--text-light);
    border-top: 1px solid var(--border);
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
    .resume-grid { grid-template-columns: 1fr; }
    .resume-sidebar { position: static; }
    .research-topics { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: var(--white);
        border-bottom: 1px solid var(--border);
        padding: 10px 16px 16px;
        gap: 4px;
        display: none;
    }

    .nav-links a { padding: 12px 14px; }
    .nav-links a.nav-cta { margin-left: 0; text-align: center; }

    .nav-toggle:checked ~ .nav-links { display: flex; }

    .nav-hamburger {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        font-size: 20px;
        color: var(--purple-dark);
        cursor: pointer;
    }

    .hero h1 { font-size: 30px; }
    .page-banner h1 { font-size: 28px; }
}

@media (max-width: 520px) {
    .research-intro { padding: 24px 20px; }
    .entry { padding: 18px 20px; }
}