/* Aurélien Froger — personal site styles
   Bootstrap 5 provides grid/collapse behavior; this file carries the
   visual identity: palette, type, header, nav, and the publication list. */

:root {
    --ink: #1f2a37;
    --muted: #5b6b7b;
    --paper: #ffffff;
    --paper-alt: #f7f8fa;
    --accent: #2b6777;
    --accent-ink: #ffffff;
    --border: #e3e6ea;
    --highlight-bg: #fbf1dd;
    --highlight-border: #e9c877;
    --highlight-text: #8a5a00;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--ink);
    background: var(--paper);
    padding-top: 1.75rem;
    padding-bottom: 2.5rem;
}

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

.page-content h5 {
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.9rem;
}

.page-content h5:first-child {
    margin-top: 0;
}

/* Header: name/photo on the left, language switch tucked in the corner */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
    padding-bottom: 1.25rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.identity {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.profile-photo {
    width: 76px;
    height: 100px;
    border-radius: 12px;
    border: 1px solid var(--border);
    object-fit: cover;
    flex-shrink: 0;
}

.identity h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.identity .role {
    margin: 0.15rem 0 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
}

.lang-toggle button,
.lang-toggle a {
    background: none;
    border: none;
    color: var(--muted);
    font-weight: 600;
    padding: 0.2rem 0.35rem;
    text-decoration: none;
    cursor: pointer;
}

.lang-toggle button.active,
.lang-toggle a.active {
    color: var(--accent);
}

.lang-toggle .sep {
    color: var(--border);
}

/* Nav: a light underline-tab bar instead of Bootstrap's dark navbar */
.site-nav.navbar {
    background: transparent;
    padding: 0.5rem 0;
    margin-bottom: 1.75rem;
    border-bottom: 1px solid var(--border);
}

.site-nav .nav-link {
    color: var(--muted);
    font-weight: 500;
    padding: 0.5rem 0.85rem;
    border-bottom: 2px solid transparent;
}

.site-nav .nav-link:hover {
    color: var(--accent);
}

.site-nav .nav-link.active {
    color: var(--accent);
    font-weight: 600;
    border-bottom-color: var(--accent);
}

.site-nav .navbar-toggler {
    border-color: var(--border);
    padding: 0.35rem 0.6rem;
}

.site-nav .navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(43, 103, 119, 0.25);
}

/* Publication / talk lists on the research page */
.pub-list {
    list-style: none;
    padding-left: 0;
}

.pub-list li {
    padding: 0.9rem 0 0.9rem 1.5rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.92rem;
    line-height: 1.55;
}

.pub-list li:last-child {
    border-bottom: none;
}

.pub-list-numbered {
    counter-reset: pub-counter;
}

.pub-list-numbered li {
    counter-increment: pub-counter;
    position: relative;
}

.pub-list-numbered li::before {
    content: counter(pub-counter) ".";
    position: absolute;
    left: 0;
    top: 0.9rem;
    width: 1.2rem;
    text-align: right;
    padding-right: 0.3rem;
    color: var(--accent);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.pub-year {
    color: var(--accent);
    font-weight: 600;
}

.pub-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-left: 0.4rem;
    padding: 0.15rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
    border-radius: 6px;
    background: var(--highlight-bg);
    color: var(--highlight-text);
    border: 1px solid var(--highlight-border);
    text-decoration: none;
}

.pub-badge::before {
    content: "★";
    font-size: 0.85em;
}

.pub-badge:hover {
    background: var(--highlight-border);
}

.pub-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.6rem;
}

.btn-pub {
    display: inline-block;
    padding: 0.3rem 0.7rem;
    font-size: 0.78rem;
    font-weight: 500;
    line-height: 1.3;
    border-radius: 999px;
    border: 1px solid var(--accent);
    color: var(--accent);
    background: transparent;
    text-decoration: none;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-pub:hover {
    background: var(--accent);
    color: var(--accent-ink);
}

.btn-pub-muted {
    border-color: var(--border);
    color: var(--muted);
}

.btn-pub-muted:hover {
    background: var(--muted);
    border-color: var(--muted);
    color: #fff;
}