/* ============================================
   Mattia Moro — Personal Site
   Aesthetic: Editorial / Refined Academic
   ============================================ */

:root {
    --color-bg: #f7f5f0;
    --color-surface: #ffffff;
    --color-text: #2a2a2a;
    --color-text-muted: #6b6860;
    --color-accent: #3a5a40;
    --color-accent-light: #588157;
    --color-accent-bg: #e8ede4;
    --color-border: #d8d4cc;
    --color-border-light: #ece9e2;
    --font-display: 'DM Serif Display', Georgia, serif;
    --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
    --max-width: 860px;
    --radius: 10px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,.07);
    --shadow-lg: 0 8px 40px rgba(0,0,0,.1);
    --transition: .3s cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 16.5px;
    line-height: 1.72;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

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

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

/* ---- Scroll Reveal ---- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .7s ease, transform .7s ease;
}
.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(247,245,240,.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}
.navbar.scrolled {
    background: rgba(247,245,240,.95);
    border-bottom-color: var(--color-border-light);
    box-shadow: var(--shadow-sm);
}
.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.nav-logo {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--color-text);
    letter-spacing: -.01em;
}
.nav-logo:hover { color: var(--color-accent); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}
.nav-links a {
    font-size: .875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    letter-spacing: .02em;
    position: relative;
    padding: 4px 0;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 2px;
    background: var(--color-accent);
    transition: width var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--color-accent); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

.lang-switch { display: flex; gap: 6px; align-items: center; margin-left: 8px; }
.lang-sep { color: var(--color-border); font-size: .8rem; }
.lang-switch a { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; }
.lang-switch a.lang-active { color: var(--color-accent); }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span {
    display: block; width: 22px; height: 2px;
    background: var(--color-text); margin: 5px 0;
    transition: all var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ============================================
   HERO
   ============================================ */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    position: relative;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 400px;
    background: linear-gradient(180deg, var(--color-accent-bg) 0%, transparent 100%);
    pointer-events: none;
}
.hero-content { position: relative; z-index: 1; }

.hero-photo {
    width: 150px; height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 28px;
    border: 4px solid var(--color-surface);
    box-shadow: var(--shadow-lg);
}

.hero h1 {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 400;
    letter-spacing: -.02em;
    margin-bottom: 12px;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    font-weight: 400;
    margin-bottom: 32px;
}

.hero-links {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    border-radius: 50px;
    font-size: .875rem;
    font-weight: 600;
    letter-spacing: .02em;
    transition: all var(--transition);
}
.btn-primary {
    background: var(--color-accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-accent-light);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.btn-outline {
    border: 1.5px solid var(--color-border);
    color: var(--color-text);
    background: var(--color-surface);
}
.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 36px;
    flex-wrap: wrap;
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid var(--color-border-light);
}
.meta-item { text-align: center; }
.meta-label {
    display: block;
    font-size: .7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--color-accent);
    margin-bottom: 4px;
}
.meta-value {
    font-size: .9rem;
    color: var(--color-text-muted);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: 64px 0;
}
.section + .section {
    border-top: 1px solid var(--color-border-light);
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 32px;
    position: relative;
    padding-left: 18px;
}
.section-title::before {
    content: '';
    position: absolute;
    left: 0; top: 6px;
    width: 4px; height: 28px;
    background: var(--color-accent);
    border-radius: 2px;
}

.section p + p { margin-top: 16px; }

/* ---- Timeline ---- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
    content: '';
    position: absolute;
    left: 5px; top: 8px; bottom: 8px;
    width: 2px;
    background: var(--color-border);
}
.timeline-item { position: relative; margin-bottom: 36px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item::before {
    content: '';
    position: absolute;
    left: -27px; top: 8px;
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 2px solid var(--color-bg);
}
.timeline-date {
    font-size: .8rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 4px;
}
.timeline-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    margin-bottom: 4px;
}
.timeline-place {
    font-size: .9rem;
    color: var(--color-text-muted);
}

/* ---- Skills Grid ---- */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.skill-tag {
    padding: 8px 18px;
    background: var(--color-accent-bg);
    color: var(--color-accent);
    font-size: .85rem;
    font-weight: 600;
    border-radius: 50px;
    letter-spacing: .01em;
}

/* ---- Languages Table ---- */
.lang-table {
    width: 100%;
    max-width: 400px;
    border-collapse: collapse;
}
.lang-table th,
.lang-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
    font-size: .95rem;
}
.lang-table th {
    font-weight: 600;
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--color-text-muted);
}

/* ---- Internship ---- */
.internship-header {
    margin-bottom: 20px;
}
.internship-header h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin-bottom: 4px;
}
.internship-header .place {
    font-size: .9rem;
    color: var(--color-text-muted);
}

.tests-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}
.test-tag {
    padding: 5px 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: .8rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

/* ---- Goals / Cards ---- */
.goals-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.goal-card {
    background: var(--color-surface);
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}
.goal-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.goal-label {
    font-size: .75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--color-accent);
    margin-bottom: 10px;
}
.goal-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    line-height: 1.5;
}

/* ============================================
   PUBLICATIONS PAGE
   ============================================ */
.page-hero {
    padding: 130px 0 50px;
    text-align: center;
}
.page-hero h1 {
    font-family: var(--font-display);
    font-size: 2.4rem;
    margin-bottom: 12px;
}
.page-hero p {
    color: var(--color-text-muted);
    font-size: 1.05rem;
}

.pub-list,
.proj-list {
    padding: 32px 0 80px;
}

.pub-card,
.proj-card {
    background: var(--color-surface);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border-light);
    margin-bottom: 20px;
    transition: all var(--transition);
}
.pub-card:hover,
.proj-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.pub-meta,
.proj-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
.badge {
    padding: 4px 12px;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    border-radius: 50px;
    background: var(--color-accent-bg);
    color: var(--color-accent);
}
.badge-outline {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
}
.pub-year,
.proj-date {
    font-size: .8rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.pub-title,
.proj-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    line-height: 1.5;
}
.proj-desc {
    margin-top: 8px;
    color: var(--color-text-muted);
    font-size: .95rem;
}
.proj-tags {
    display: flex;
    gap: 8px;
    margin-top: 14px;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--color-border-light);
}
.site-footer p {
    font-size: .85rem;
    color: var(--color-text-muted);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-links {
        position: fixed;
        top: 64px; left: 0; right: 0;
        background: rgba(247,245,240,.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        gap: 0;
        padding: 8px 0;
        border-bottom: 1px solid var(--color-border-light);
        box-shadow: var(--shadow-md);
        transform: translateY(-110%);
        transition: transform var(--transition);
    }
    .nav-links.open { transform: translateY(0); }
    .nav-links li { width: 100%; }
    .nav-links a {
        display: block;
        padding: 14px 28px;
    }
    .nav-links a::after { display: none; }
    .lang-switch { padding: 14px 28px; margin-left: 0; }

    .hero { padding: 120px 0 60px; }
    .hero h1 { font-size: 2rem; }
    .hero-meta { gap: 20px; }
    .goals-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 1.5rem; }
}