@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #007AFF;
    --primary-hover: #0063CC;
    --background: #ffffff;
    --text: #1d1d1f;
    --text-muted: #86868b;
    --secondary-bg: #f5f5f7;
    --border: #d2d2d7;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Outfit', sans-serif;
    --max-width: 1000px;
    --nav-height: 70px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background: #000000;
        --text: #f5f5f7;
        --text-muted: #a1a1a6;
        --secondary-bg: #1c1c1e;
        --border: #38383a;
        --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    }
}

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

body {
    font-family: var(--font-main);
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--nav-height) + 2rem) 1.5rem 2rem;
}

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

@media (prefers-color-scheme: dark) {
    .main-nav {
        background: rgba(0, 0, 0, 0.8);
    }
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
}

.nav-logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text) !important;
    text-decoration: none !important;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary);
    text-decoration: none;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; border-bottom: 2px solid var(--primary); display: inline-block; margin-bottom: 2rem; padding-bottom: 0.5rem; }
h3 { font-size: 1.5rem; margin-top: 1.5rem; }

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

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Header & Hero */
header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 4rem;
}

.profile-img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1.5rem;
    border: 4px solid var(--primary);
    box-shadow: var(--card-shadow);
}

.contact-info {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.cv-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.6rem 1.5rem;
    background-color: var(--primary);
    color: white;
    border-radius: 999px;
    font-weight: 600;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.cv-link:hover {
    background-color: var(--primary-hover);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
}

/* Sections */
section {
    margin-bottom: 4rem;
}

.posts-wrapper {
    max-width: 100%;
}

ul {
    list-style: none;
}

.list-item {
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 3px solid var(--border);
    transition: border-color 0.2s ease;
}

.list-item:hover {
    border-left-color: var(--primary);
}

.list-item em {
    display: block;
    color: var(--text-muted);
    font-style: normal;
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

/* Publication Card */
.pub-card {
    background: var(--secondary-bg);
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pub-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow);
}

.pub-title {
    font-weight: 700;
    font-size: 1.2rem;
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.pub-authors {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.pub-venue {
    font-style: italic;
    color: var(--primary);
    font-size: 0.95rem;
}

.pub-links {
    margin-top: 0.75rem;
    display: flex;
    gap: 1rem;
}

.badge {
    padding: 0.3rem 0.8rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    background: var(--border);
    color: var(--text);
    transition: background-color 0.2s ease;
}

.badge:hover {
    background: var(--primary);
    color: white;
    text-decoration: none;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    header { margin-bottom: 2rem; }
    .profile-img { width: 140px; height: 140px; }
}