/* ============================================================
   Luca D'Aniello — Personal Academic Website
   style.css
   ============================================================ */

/* ── Variables ────────────────────────────────────────────── */
:root {
    --navy:        #162a46;
    --navy-dark:   #0d1b2e;
    --navy-mid:    #1e3a5f;
    --blue:        #2563eb;
    --blue-hover:  #1d4ed8;
    --teal:        #0891b2;
    --gold:        #d97706;
    --white:       #ffffff;
    --off-white:   #f8fafc;
    --light:       #f1f5f9;
    --border:      #e2e8f0;
    --text:        #0f172a;
    --text-body:   #334155;
    --text-muted:  #64748b;

    --font-serif:  'Playfair Display', Georgia, serif;
    --font-sans:   'Inter', system-ui, sans-serif;

    --shadow-sm:   0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
    --shadow-md:   0 4px 16px rgba(0,0,0,.10);
    --shadow-lg:   0 8px 32px rgba(0,0,0,.12);

    --radius:      12px;
    --radius-sm:   8px;
    --transition:  .25s ease;

    --section-pad: 100px;
    --container:   1140px;
    --nav-h:       70px;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-sans);
    color: var(--text-body);
    background: var(--white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: var(--blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--blue-hover); }
ul { list-style: none; }

/* ── Container ────────────────────────────────────────────── */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: .9rem;
    letter-spacing: .02em;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
}
.btn-primary {
    background: var(--blue);
    color: var(--white);
    border-color: var(--blue);
}
.btn-primary:hover {
    background: var(--blue-hover);
    border-color: var(--blue-hover);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37,99,235,.35);
}
.btn-secondary {
    background: var(--navy);
    color: var(--white);
    border-color: var(--navy);
}
.btn-secondary:hover {
    background: var(--navy-dark);
    border-color: var(--navy-dark);
    color: var(--white);
    transform: translateY(-2px);
}
.btn-outline {
    background: transparent;
    color: var(--blue);
    border-color: var(--blue);
}
.btn-outline:hover {
    background: var(--blue);
    color: var(--white);
    transform: translateY(-2px);
}
.btn-light {
    background: var(--white);
    color: var(--navy);
    border-color: var(--white);
}
.btn-light:hover {
    background: var(--off-white);
    color: var(--navy-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255,255,255,.25);
}
.btn-outline-light {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,.6);
}
.btn-outline-light:hover {
    background: rgba(255,255,255,.1);
    border-color: var(--white);
    color: var(--white);
}
.btn-sm { padding: 9px 20px; font-size: .82rem; }

/* ── Navbar ───────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    height: var(--nav-h);
    transition: background var(--transition), box-shadow var(--transition);
    background: transparent;
}
.navbar.scrolled {
    background: rgba(22, 42, 70, 0.97);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,.2);
}
.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-brand {
    font-family: var(--font-serif);
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--white);
    letter-spacing: .01em;
}
.nav-brand:hover { color: rgba(255,255,255,.8); }
.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-link {
    color: rgba(255,255,255,.85);
    font-size: .88rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 6px;
    transition: all var(--transition);
}
.nav-link:hover,
.nav-link.active {
    color: var(--white);
    background: rgba(255,255,255,.12);
}
.nav-cv {
    color: var(--white);
    background: var(--blue);
    font-size: .82rem;
    font-weight: 600;
    padding: 7px 16px;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
    transition: all var(--transition);
}
.nav-cv:hover {
    background: var(--blue-hover);
    color: var(--white);
    transform: translateY(-1px);
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all .3s ease;
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 50%, var(--navy-mid) 100%);
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.hero-bg-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(37,99,235,.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(8,145,178,.12) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255,255,255,.02) 0%, transparent 70%);
    pointer-events: none;
}
.hero-container {
    flex: 1;
    max-width: var(--container);
    margin: 0 auto;
    padding: calc(var(--nav-h) + 60px) 24px 60px;
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 64px;
    align-items: center;
    width: 100%;
}
.hero-eyebrow {
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: rgba(255,255,255,.55);
    margin-bottom: 20px;
}
.hero-name {
    font-family: var(--font-serif);
    font-size: clamp(3.2rem, 6vw, 5.5rem);
    font-weight: 700;
    color: var(--white);
    line-height: 1.05;
    margin-bottom: 20px;
    letter-spacing: -.02em;
}
.name-accent {
    color: transparent;
    -webkit-text-stroke: 2px rgba(255,255,255,.9);
    display: block;
}
.hero-institution {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: rgba(255,255,255,.65);
    font-size: .92rem;
    line-height: 1.5;
    margin-bottom: 40px;
}
.hero-institution i { margin-top: 4px; color: var(--teal); flex-shrink: 0; }
.hero-stats {
    display: flex;
    align-items: center;
    gap: 0;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius);
    padding: 20px 28px;
    margin-bottom: 36px;
    backdrop-filter: blur(6px);
    width: fit-content;
}
.stat { text-align: center; padding: 0 24px; }
.stat-num {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1;
}
.stat-label {
    display: block;
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: rgba(255,255,255,.5);
    margin-top: 4px;
}
.stat-sep {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,.15);
    flex-shrink: 0;
}
.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}
.hero-social {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.hero-social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.15);
    color: rgba(255,255,255,.7);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .9rem;
    transition: all var(--transition);
}
.hero-social-link:hover {
    background: var(--blue);
    border-color: var(--blue);
    color: var(--white);
    transform: translateY(-3px);
}
.hero-photo {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}
.photo-wrapper {
    width: 320px;
    height: 380px;
    border-radius: 24px;
    overflow: hidden;
    border: 3px solid rgba(255,255,255,.15);
    background: rgba(255,255,255,.06);
    box-shadow: var(--shadow-lg), inset 0 0 40px rgba(0,0,0,.1);
    position: relative;
}
.photo-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.photo-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(37,99,235,.15), rgba(8,145,178,.1));
}
.photo-placeholder i {
    font-size: 5rem;
    color: rgba(255,255,255,.2);
}
.hero-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 50px;
    padding: 10px 20px;
    backdrop-filter: blur(6px);
    align-self: flex-start;
}
.hero-badge i {
    color: var(--teal);
    font-size: 1rem;
}
.hero-badge strong {
    display: block;
    color: var(--white);
    font-size: .82rem;
    line-height: 1.2;
}
.hero-badge small {
    color: rgba(255,255,255,.5);
    font-size: .72rem;
}
.scroll-hint {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: rgba(255,255,255,.35);
    font-size: .72rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    text-decoration: none;
    padding: 20px;
    transition: color var(--transition);
    animation: scrollBounce 2s ease-in-out infinite;
}
.scroll-hint:hover { color: rgba(255,255,255,.7); }
@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

/* ── Sections base ────────────────────────────────────────── */
.section {
    padding: var(--section-pad) 0;
}
.section-alt {
    background: var(--off-white);
}
.section-header {
    margin-bottom: 56px;
}
.section-tag {
    display: inline-block;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 10px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--text);
    letter-spacing: -.02em;
    line-height: 1.15;
}

/* ── About ────────────────────────────────────────────────── */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 64px;
    align-items: start;
}
.about-text p {
    margin-bottom: 18px;
    color: var(--text-body);
    font-size: .97rem;
    line-height: 1.8;
}
.about-text p.lead {
    font-size: 1.1rem;
    color: var(--text);
    font-weight: 500;
    line-height: 1.7;
}
.about-text .btn { margin-top: 8px; }

.sidebar-block {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 28px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}
.sidebar-title {
    font-family: var(--font-sans);
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-title i { color: var(--blue); }
.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tag {
    display: inline-block;
    padding: 5px 13px;
    background: #eff6ff;
    color: #1e40af;
    border-radius: 50px;
    font-size: .78rem;
    font-weight: 600;
    border: 1px solid #bfdbfe;
    transition: all var(--transition);
}
.tag:hover {
    background: var(--blue);
    color: var(--white);
    border-color: var(--blue);
    transform: translateY(-1px);
}
.affiliation-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    font-size: .875rem;
    color: var(--text-body);
    border-bottom: 1px solid var(--light);
}
.affiliation-list li:last-child { border-bottom: none; }
.affiliation-list i {
    color: var(--blue);
    margin-top: 3px;
    flex-shrink: 0;
    width: 16px;
    text-align: center;
}

/* ── Subsection ───────────────────────────────────────────── */
.subsection { margin-bottom: 72px; }
.subsection:last-child { margin-bottom: 0; }
.subsection-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 32px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 14px;
}
.subsection-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
}
.view-all {
    font-size: .8rem;
    font-weight: 600;
    color: var(--blue);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}
.view-all:hover { gap: 10px; }

/* ── Publications ─────────────────────────────────────────── */
.pub-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--border);
    box-shadow: var(--shadow-sm);
}
.pub-card {
    display: grid;
    grid-template-columns: 64px 1fr;
    background: var(--white);
    transition: background var(--transition);
    padding: 0;
}
.section-alt .pub-card { background: var(--white); }
.pub-card:hover { background: #fafbff; }
.pub-year {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light);
    font-family: var(--font-serif);
    font-size: .85rem;
    font-weight: 700;
    color: var(--text-muted);
    border-right: 1px solid var(--border);
    min-height: 100%;
    flex-shrink: 0;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    padding: 20px 0;
}
.pub-body {
    padding: 20px 24px;
}
.pub-badges {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}
.badge {
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 3px 9px;
    border-radius: 4px;
}
.badge-journal { background: #eff6ff; color: #1e40af; }
.badge-preprint { background: #fff7ed; color: #9a3412; }
.badge-fascia   { background: #f0fdf4; color: #166534; }
.badge-book     { background: #fdf4ff; color: #7e22ce; }
.badge-software { background: #ecfeff; color: #164e63; }
.pub-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: 6px;
}
.pub-meta {
    font-size: .82rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.pub-venue {
    font-size: .82rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}
.pub-link {
    font-size: .78rem;
    font-weight: 600;
    color: var(--blue);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.pub-link:hover { gap: 8px; }
.pub-note {
    margin-top: 16px;
    font-size: .8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}
.pub-note i { color: var(--blue); }

/* ── Projects ─────────────────────────────────────────────── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.project-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: #bfdbfe;
}
.project-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.project-badge {
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 4px;
    background: #eff6ff;
    color: #1e40af;
}
.project-badge.pnrr { background: #fdf4ff; color: #7e22ce; }
.project-years {
    font-size: .78rem;
    color: var(--text-muted);
    font-weight: 600;
    white-space: nowrap;
}
.project-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
    flex: 1;
}
.project-desc {
    font-size: .84rem;
    color: var(--text-muted);
    line-height: 1.65;
}
.project-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--light);
    flex-wrap: wrap;
}
.project-role {
    font-size: .75rem;
    font-weight: 600;
    color: var(--blue);
    display: flex;
    align-items: center;
    gap: 5px;
}
.project-pi {
    font-size: .75rem;
    color: var(--text-muted);
}

/* ── Software ─────────────────────────────────────────────── */
.software-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}
.software-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 28px;
    transition: all var(--transition);
}
.software-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.software-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
}
.tall-color   { background: linear-gradient(135deg, #eff6ff, #dbeafe); color: var(--blue); }
.biblio-color { background: linear-gradient(135deg, #f0fdf4, #dcfce7); color: #16a34a; }
.software-name {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 2px;
}
.software-tagline {
    font-size: .82rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 14px;
    letter-spacing: .02em;
}
.software-desc {
    font-size: .88rem;
    color: var(--text-body);
    line-height: 1.75;
    margin-bottom: 16px;
}
.software-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}
.pill {
    font-size: .75rem;
    font-weight: 600;
    padding: 4px 12px;
    background: var(--light);
    color: var(--text-muted);
    border-radius: 50px;
    border: 1px solid var(--border);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* ── Teaching ─────────────────────────────────────────────── */
.teaching-intro {
    font-size: 1rem;
    color: var(--text-body);
    max-width: 720px;
    margin-bottom: 40px;
    line-height: 1.75;
}
.teaching-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.teaching-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.teaching-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: #bfdbfe;
}
.teaching-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: #eff6ff;
    color: var(--blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}
.teaching-content h4 {
    font-size: .92rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    line-height: 1.35;
}
.teaching-content p {
    font-size: .78rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ── Contact ──────────────────────────────────────────────── */
.contact-section {
    background: linear-gradient(160deg, var(--navy-dark) 0%, var(--navy-mid) 100%);
    color: var(--white);
}
.contact-section .section-tag { color: var(--teal); }
.contact-section .section-title { color: var(--white); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}
.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 28px;
}
.contact-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.12);
    color: var(--teal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .95rem;
    flex-shrink: 0;
}
.contact-item strong {
    display: block;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.5);
    margin-bottom: 4px;
}
.contact-item p {
    font-size: .88rem;
    color: rgba(255,255,255,.8);
    line-height: 1.65;
}
.contact-item a {
    color: rgba(255,255,255,.8);
}
.contact-item a:hover { color: var(--white); }
.contact-social-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: rgba(255,255,255,.9);
    margin-bottom: 20px;
}
.social-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.social-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 18px 12px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,.75);
    font-size: .76rem;
    font-weight: 600;
    transition: all var(--transition);
    text-align: center;
}
.social-card i { font-size: 1.4rem; }
.social-card:hover {
    background: rgba(255,255,255,.12);
    color: var(--white);
    border-color: rgba(255,255,255,.25);
    transform: translateY(-3px);
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
    background: var(--navy-dark);
    border-top: 1px solid rgba(255,255,255,.06);
    padding: 36px 0;
}
.footer-inner {
    text-align: center;
}
.footer-name {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: rgba(255,255,255,.9);
    margin-bottom: 6px;
}
.footer-sub {
    font-size: .8rem;
    color: rgba(255,255,255,.4);
    line-height: 1.6;
    margin-bottom: 12px;
}
.footer-sub a { color: rgba(255,255,255,.5); }
.footer-sub a:hover { color: rgba(255,255,255,.8); }
.footer-copy {
    font-size: .75rem;
    color: rgba(255,255,255,.25);
}

/* ── Inner page header ────────────────────────────────────── */
.inner-page body { padding-top: var(--nav-h); }
.page-header {
    background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy-mid) 100%);
    padding: 64px 0 52px;
    position: relative;
    overflow: hidden;
    margin-top: var(--nav-h);
}
.page-header-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 10% 90%, rgba(37,99,235,.15) 0%, transparent 50%),
        radial-gradient(circle at 90% 10%, rgba(8,145,178,.10) 0%, transparent 50%);
    pointer-events: none;
}
.page-tag {
    display: inline-block;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--teal);
    margin-bottom: 10px;
}
.page-title {
    font-family: var(--font-serif);
    font-size: clamp(2.4rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--white);
    letter-spacing: -.02em;
    position: relative;
}

/* ── Bio page ─────────────────────────────────────────────── */
.bio-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 56px;
    align-items: start;
}
.bio-main p {
    margin-bottom: 18px;
    color: var(--text-body);
    font-size: .97rem;
    line-height: 1.8;
}
.bio-main p.lead {
    font-size: 1.08rem;
    color: var(--text);
    font-weight: 500;
}
.position-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.position-years {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--blue);
}
.position-item strong {
    font-size: .95rem;
    color: var(--text);
}
.position-item span {
    font-size: .84rem;
    color: var(--text-muted);
    line-height: 1.5;
}
.position-field {
    font-size: .78rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ── Timeline ─────────────────────────────────────────────── */
.timeline {
    position: relative;
    padding-left: 32px;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}
.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 28px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
    position: absolute;
    left: -32px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--white);
    border: 3px solid var(--border);
    transition: border-color var(--transition);
}
.timeline-marker.blue { border-color: var(--blue); background: var(--blue); }
.timeline-item:hover .timeline-marker { border-color: var(--blue); }
.timeline-years {
    font-size: .76rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 6px;
}
.timeline-content h3 {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}
.timeline-place {
    font-size: .84rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.timeline-content p {
    font-size: .88rem;
    color: var(--text-body);
    line-height: 1.7;
    margin-bottom: 4px;
}
.timeline-note {
    font-size: .8rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ── Awards ───────────────────────────────────────────────── */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.award-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.award-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.award-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: #f1f5f9;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.award-icon.gold { background: #fffbeb; color: var(--gold); }
.award-year {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 4px;
}
.award-content h4 {
    font-size: .95rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}
.award-content p {
    font-size: .82rem;
    color: var(--text-muted);
    line-height: 1.55;
    margin-bottom: 4px;
}
.award-paper {
    font-size: .78rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ── Two-col grid ─────────────────────────────────────────── */
.two-col-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    align-items: start;
}

/* ── Stats banner (research page) ────────────────────────── */
.stats-banner {
    background: var(--navy);
    padding: 36px 0;
    border-bottom: 1px solid rgba(255,255,255,.06);
}
.stats-row {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
}
.stats-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 40px;
}
.stats-block .stat-num {
    font-family: var(--font-serif);
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1;
    display: block;
}
.stats-block .stat-label {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.5);
    margin-top: 4px;
}
.stats-block .stat-sub {
    font-size: .7rem;
    color: rgba(255,255,255,.3);
    margin-top: 2px;
}
.stats-sep {
    width: 1px;
    height: 50px;
    background: rgba(255,255,255,.12);
    flex-shrink: 0;
}
.stats-sep-right { margin-right: 20px; }
.stats-links { padding: 0 24px; }
.stats-links-label {
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.35);
    display: block;
    margin-bottom: 10px;
}
.stats-db-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.db-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 50px;
    color: rgba(255,255,255,.75);
    font-size: .76rem;
    font-weight: 600;
    transition: all var(--transition);
    text-decoration: none;
}
.db-link:hover {
    background: rgba(255,255,255,.16);
    color: var(--white);
    transform: translateY(-1px);
}

/* ── Research areas ───────────────────────────────────────── */
.research-areas-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.research-area-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border-top: 3px solid transparent;
}
.research-area-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-top-color: var(--blue);
}
.ra-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: #eff6ff;
    color: var(--blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    margin-bottom: 16px;
}
.research-area-card h3 {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
}
.research-area-card p {
    font-size: .84rem;
    color: var(--text-muted);
    line-height: 1.65;
}
.subsection-note {
    font-size: .78rem;
    color: var(--text-muted);
    font-style: italic;
}
.badge-conf  { background: #f0f9ff; color: #075985; }
.badge-arXiv { background: #fef3c7; color: #92400e; }

/* ── Software feature (software.html) ────────────────────── */
.software-feature {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.sf-header {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    padding: 36px 40px 28px;
    border-bottom: 1px solid var(--border);
    background: var(--light);
}
.sf-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    flex-shrink: 0;
}
.sf-name {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 2px;
}
.sf-tagline {
    font-size: .88rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 14px;
}
.sf-body {
    padding: 36px 40px;
}
.sf-body p {
    margin-bottom: 16px;
    color: var(--text-body);
    font-size: .95rem;
    line-height: 1.8;
}
.sf-body p.lead {
    font-size: 1.05rem;
    color: var(--text);
    font-weight: 500;
}
.sf-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 28px 0;
    padding: 24px;
    background: var(--off-white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}
.sf-feature {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}
.sf-feature i {
    color: var(--blue);
    font-size: 1rem;
    margin-top: 3px;
    flex-shrink: 0;
    width: 16px;
}
.sf-feature strong {
    display: block;
    font-size: .88rem;
    color: var(--text);
    margin-bottom: 3px;
}
.sf-feature p {
    font-size: .8rem !important;
    color: var(--text-muted) !important;
    margin-bottom: 0 !important;
    line-height: 1.5 !important;
}
.sf-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.section-alt .software-feature { background: var(--white); }

/* ── Course table (teaching.html) ────────────────────────── */
.course-table-grid {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.course-row {
    display: grid;
    grid-template-columns: 160px 1fr;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}
.course-row:last-child { border-bottom: none; }
.course-row:hover { background: #fafbff; }
.course-meta {
    padding: 18px 20px;
    background: var(--light);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 6px;
    justify-content: center;
}
.course-years {
    font-size: .75rem;
    font-weight: 700;
    color: var(--blue);
    letter-spacing: .04em;
}
.course-cfu {
    font-size: .72rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--border);
    padding: 2px 8px;
    border-radius: 4px;
    width: fit-content;
}
.course-info {
    padding: 18px 24px;
}
.course-info h4 {
    font-size: .95rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}
.course-info p {
    font-size: .82rem;
    color: var(--text-muted);
    line-height: 1.5;
}
.course-holder {
    font-size: .78rem !important;
    font-style: italic;
    color: var(--text-muted) !important;
    margin-top: 4px;
}

/* ── Contact page (standalone) ───────────────────────────── */
.contact-heading {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
}
.contact-lead {
    font-size: .97rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 480px;
}
/* On contact.html: keep contact items light (not dark bg) */
.inner-page .contact-section {
    background: none;
    color: var(--text-body);
}
.inner-page .contact-section .section-tag { color: var(--blue); }
.inner-page .contact-section .section-title { color: var(--text); }
.inner-page .contact-icon-wrap {
    background: #eff6ff;
    border-color: #bfdbfe;
    color: var(--blue);
}
.inner-page .contact-item strong { color: var(--text-muted); }
.inner-page .contact-item p { color: var(--text-body); }
.inner-page .contact-item a { color: var(--blue); }
.inner-page .social-card {
    background: var(--light);
    border-color: var(--border);
    color: var(--text-muted);
}
.inner-page .social-card:hover {
    background: var(--blue);
    color: var(--white);
    border-color: var(--blue);
}
.inner-page .contact-social-title { color: var(--text); }

/* ── Animations ───────────────────────────────────────────── */
.reveal-up {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .65s ease, transform .65s ease;
}
.reveal-right {
    opacity: 0;
    transform: translateX(28px);
    transition: opacity .65s ease, transform .65s ease;
}
.reveal-up.visible,
.reveal-right.visible {
    opacity: 1;
    transform: none;
}
.delay-1 { transition-delay: .1s; }
.delay-2 { transition-delay: .2s; }
.delay-3 { transition-delay: .3s; }
.delay-4 { transition-delay: .4s; }
.delay-5 { transition-delay: .5s; }

/* ── Responsive ───────────────────────────────────────────── */
/* ── Hero role line ───────────────────────────────────────── */
.hero-role {
    font-size: .82rem;
    font-weight: 600;
    letter-spacing: .06em;
    color: rgba(255,255,255,.5);
    margin-bottom: 6px;
}

@media (max-width: 1100px) {
    .hero-container { grid-template-columns: 1fr; gap: 48px; }
    .hero-photo { display: none; }
    .about-grid { grid-template-columns: 1fr; }
    .bio-grid { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .software-grid { grid-template-columns: 1fr; }
    .teaching-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .research-areas-grid { grid-template-columns: repeat(2, 1fr); }
    .awards-grid { grid-template-columns: 1fr; }
    .two-col-grid { grid-template-columns: 1fr; }
    .sf-features { grid-template-columns: 1fr; }
    .stats-row { flex-wrap: wrap; gap: 20px; justify-content: center; }
    .stats-block { padding: 8px 24px; }
    .stats-sep { display: none; }
}

@media (max-width: 768px) {
    :root {
        --section-pad: 64px;
    }
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--nav-h);
        left: 0;
        right: 0;
        background: var(--navy-dark);
        padding: 16px;
        gap: 4px;
        box-shadow: 0 8px 24px rgba(0,0,0,.3);
    }
    .nav-toggle { display: flex; }
    .nav-cv { margin-left: 0; }

    .hero-name { font-size: 3rem; }
    .hero-stats { width: 100%; justify-content: center; }
    .stat { padding: 0 16px; }
    .stat-num { font-size: 1.8rem; }

    .projects-grid { grid-template-columns: 1fr; }
    .teaching-grid { grid-template-columns: 1fr; }
    .software-card { flex-direction: column; }
    .subsection-header { flex-direction: column; align-items: flex-start; }
    .social-cards { grid-template-columns: repeat(2, 1fr); }
    .pub-card { grid-template-columns: 48px 1fr; }
    .research-areas-grid { grid-template-columns: 1fr; }
    .sf-header { flex-direction: column; }
    .sf-body { padding: 24px; }
    .sf-header { padding: 24px; }
    .course-row { grid-template-columns: 1fr; }
    .course-meta { border-right: none; border-bottom: 1px solid var(--border); }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { text-align: center; justify-content: center; }
    .stat-sep { display: none; }
    .hero-stats { flex-wrap: wrap; gap: 16px; }
    .stat { width: 45%; }
    .pub-year { font-size: .7rem; }
}