/* ===================================================
   LiDAR Noir — Design System
   Tianyu Li Personal Website
   =================================================== */

:root {
    --bg:          #060810;
    --bg-2:        #0b0f1a;
    --bg-3:        #111827;
    --surface:     rgba(17, 24, 39, 0.55);
    --border:      rgba(255, 255, 255, 0.06);
    --border-hi:   rgba(249, 115, 22, 0.28);

    --text:        #f0f4f8;
    --text-2:      #8fa3b8;
    --text-3:      #3d5166;

    --amber:       #f97316;
    --amber-lt:    #fb923c;
    --amber-dim:   rgba(249, 115, 22, 0.12);
    --amber-glow:  rgba(249, 115, 22, 0.25);
    --cyan:        #22d3ee;
    --cyan-dim:    rgba(34, 211, 238, 0.08);
    --green:       #22c55e;

    --sidebar-w:   260px;

    --font-display: 'Syne', sans-serif;
    --font-serif:   'DM Serif Display', serif;
    --font-body:    'Instrument Sans', system-ui, sans-serif;
    --font-mono:    'JetBrains Mono', monospace;

    --ease:        cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out:    cubic-bezier(0.0, 0.0, 0.2, 1);
}

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    cursor: none;
}

/* ===== Canvas ===== */
#bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* ===== Custom Cursor ===== */
.cursor-ring {
    position: fixed;
    width: 30px;
    height: 30px;
    border: 1.5px solid var(--amber);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.25s var(--ease), height 0.25s var(--ease),
                border-color 0.25s, opacity 0.25s;
    will-change: left, top;
}

.cursor-dot {
    position: fixed;
    width: 4px;
    height: 4px;
    background: var(--amber);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    will-change: left, top;
}

body.cursor-hover .cursor-ring {
    width: 44px;
    height: 44px;
    border-color: var(--cyan);
    background: var(--cyan-dim);
}

/* ===== Sidebar ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-w);
    height: 100vh;
    z-index: 100;
    border-right: 1px solid var(--border);
    background: rgba(6, 8, 16, 0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 2.5rem 1.75rem;
}

.sidebar-brand {
    margin-bottom: 3rem;
}

.brand-name {
    display: block;
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--amber);
    line-height: 1;
    letter-spacing: -0.03em;
}

.brand-sub {
    display: block;
    font-size: 0.85rem;
    color: var(--text-3);
    margin-top: 0.3rem;
    letter-spacing: 0.12em;
    font-family: var(--font-mono);
}

/* Sidebar Nav */
.sidebar-nav { flex: 1; }

.sidebar-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 0.75rem;
    border-radius: 7px;
    text-decoration: none;
    color: var(--text-2);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s, background 0.2s;
    position: relative;
}

.sidebar-nav .nav-link::before {
    content: attr(data-num);
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--text-3);
    transition: color 0.2s;
    min-width: 1.5rem;
    flex-shrink: 0;
}

.sidebar-nav .nav-link:hover {
    color: var(--text);
    background: rgba(255,255,255,0.04);
}

.sidebar-nav .nav-link.active {
    color: var(--amber);
    background: var(--amber-dim);
}

.sidebar-nav .nav-link.active::before { color: var(--amber); }

/* Sidebar Social */
.sidebar-social {
    display: flex;
    gap: 1.1rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.sidebar-social a {
    color: var(--text-3);
    font-size: 0.95rem;
    text-decoration: none;
    transition: color 0.2s, transform 0.2s;
    display: flex;
}

.sidebar-social a:hover {
    color: var(--amber);
    transform: translateY(-2px);
}

/* Sidebar Status */
.sidebar-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.72rem;
    color: var(--text-3);
    font-family: var(--font-mono);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
    flex-shrink: 0;
    animation: pulse-status 2.5s ease-in-out infinite;
}

@keyframes pulse-status {
    0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(34, 197, 94, 0.5); }
    50%       { opacity: 0.5; box-shadow: 0 0 4px rgba(34, 197, 94, 0.2); }
}

/* ===== Mobile Header ===== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    padding: 1rem 1.5rem;
    background: rgba(6, 8, 16, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    align-items: center;
    justify-content: space-between;
}

.mobile-brand {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--amber);
}

.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--text-2);
    transition: all 0.3s var(--ease);
    transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 57px;
    left: 0;
    right: 0;
    z-index: 199;
    background: rgba(6, 8, 16, 0.98);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: 1.25rem 1.5rem;
    transform: translateY(-8px);
    opacity: 0;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
    pointer-events: none;
}

.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}

.mobile-menu ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-menu a {
    display: block;
    padding: 0.65rem 0.9rem;
    color: var(--text-2);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: 7px;
    transition: all 0.2s;
}

.mobile-menu a:hover {
    color: var(--amber);
    background: var(--amber-dim);
}

/* Mobile Social */
.mobile-social {
    display: flex;
    gap: 1.25rem;
    padding-top: 1.25rem;
    margin-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.mobile-social a {
    color: var(--text-3);
    font-size: 1.05rem;
    text-decoration: none;
    transition: color 0.2s;
    display: flex;
}

.mobile-social a:hover {
    color: var(--amber);
}

/* ===== Layout ===== */
.main-content {
    margin-left: var(--sidebar-w);
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 5rem 5rem 4rem;
    position: relative;
}

.hero-inner { max-width: 700px; }

.hero-eyebrow {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.75rem;
    opacity: 0;
    animation: fade-up 0.8s var(--ease) 0.1s forwards;
}

.hero-eyebrow .mono {
    font-size: 0.75rem;
    color: var(--text-3);
    letter-spacing: 0.08em;
}

.divider-dot {
    color: var(--amber);
    font-size: 0.6rem;
    line-height: 1;
}

/* Hero Name */
.hero-name {
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fade-up 0.9s var(--ease) 0.18s forwards;
}

.name-en {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 6.5vw, 5.75rem);
    font-weight: 800;
    line-height: 0.93;
    letter-spacing: -0.035em;
    color: var(--text);
}

.name-cn {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(1.4rem, 2.8vw, 2.2rem);
    color: var(--text-3);
    font-weight: 400;
    font-style: italic;
    margin-top: 0.6rem;
    letter-spacing: 0.12em;
}

/* Hero Tagline */
.hero-tagline {
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    color: var(--text-2);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    opacity: 0;
    animation: fade-up 0.8s var(--ease) 0.28s forwards;
}

.typed-wrap {
    color: var(--amber);
    font-weight: 600;
    display: inline-flex;
    align-items: baseline;
}

.tcursor {
    color: var(--amber);
    animation: blink-cursor 1s step-end infinite;
    margin-left: 1px;
}

@keyframes blink-cursor {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}

/* Hero Portrait */
.hero-portrait {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-hi);
    box-shadow: 0 0 24px var(--amber-dim), 0 0 0 4px var(--bg);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fade-up 0.8s var(--ease) 0.05s forwards;
}

.hero-portrait img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(0.15) contrast(1.05);
    transition: filter 0.4s var(--ease);
}

.hero-portrait:hover img {
    filter: grayscale(0) contrast(1);
}

/* Hero CTA */
.hero-cta {
    display: flex;
    gap: 0.9rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: fade-up 0.8s var(--ease) 0.52s forwards;
}

.cta-primary {
    display: inline-flex;
    align-items: center;
    padding: 0.7rem 1.6rem;
    background: var(--amber);
    color: #000;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.875rem;
    letter-spacing: 0.02em;
    border-radius: 5px;
    transition: background 0.2s, transform 0.2s var(--ease), box-shadow 0.2s;
}

.cta-primary:hover {
    background: var(--amber-lt);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--amber-glow);
}

.cta-secondary {
    display: inline-flex;
    align-items: center;
    padding: 0.7rem 1.6rem;
    border: 1px solid var(--border);
    color: var(--text-2);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: 5px;
    transition: border-color 0.2s, color 0.2s, transform 0.2s;
}

.cta-secondary:hover {
    border-color: var(--amber);
    color: var(--amber);
    transform: translateY(-2px);
}

/* Scroll indicator */
.hero-scroll {
    position: absolute;
    bottom: 2.5rem;
    left: 5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    opacity: 0;
    animation: fade-in 1s ease 1.3s forwards;
}

.hero-scroll span {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.18em;
}

.scroll-line {
    width: 48px;
    height: 1px;
    background: linear-gradient(to right, var(--amber) 0%, transparent 100%);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: rgba(255,255,255,0.6);
    animation: sweep-line 2.2s ease-in-out infinite;
}

@keyframes sweep-line {
    0%   { left: -60%; }
    100% { left: 160%; }
}

/* ===== Sections ===== */
.section {
    padding: 5.5rem 5rem;
    border-top: 1px solid var(--border);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.section-num {
    font-size: 0.7rem;
    color: var(--amber);
    letter-spacing: 0.12em;
    flex-shrink: 0;
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: 1.85rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1;
}

.mono {
    font-family: var(--font-mono);
    font-size: 0.85em;
}

.subsection-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-2);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ===== About ===== */
.about-body {
    max-width: 640px;
}

.about-text p {
    color: var(--text-2);
    font-size: 0.975rem;
    margin-bottom: 1.25rem;
}

.about-text strong { color: var(--text); }

.about-text mark {
    background: none;
    color: var(--amber);
    font-weight: 600;
}

.interest-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-top: 1.75rem;
}

.interest-grid span {
    padding: 0.3rem 0.8rem;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.78rem;
    color: var(--text-2);
    transition: border-color 0.2s, color 0.2s, transform 0.2s;
}

.interest-grid span:hover {
    border-color: var(--amber);
    color: var(--amber);
    transform: translateY(-1px);
}

/* ===== Publications ===== */
.pub-list {
    display: flex;
    flex-direction: column;
}

.pub-item {
    display: grid;
    grid-template-columns: 88px 1fr;
    gap: 2rem;
    padding: 1.7rem 0;
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
    margin: 0 -1.5rem;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    border-radius: 0;
}

.pub-item:first-child { border-top: 1px solid var(--border); }

.pub-item:hover { background: rgba(255,255,255,0.015); }

.highlight-pub {
    position: relative;
}

.highlight-pub::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--amber);
    border-radius: 0 2px 2px 0;
}

.pub-left {
    display: flex;
    flex-direction: column;
    gap: 0.32rem;
    padding-top: 0.15rem;
    flex-shrink: 0;
}

.venue-tag {
    display: inline-block;
    padding: 0.22rem 0.55rem;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-align: center;
    width: fit-content;
    white-space: nowrap;
}

.venue-tag.neurips { background: linear-gradient(135deg, #6366f1, #8b5cf6); color: #fff; }
.venue-tag.cvpr    { background: linear-gradient(135deg, #ef4444, #f97316); color: #fff; }
.venue-tag.iccv    { background: linear-gradient(135deg, #10b981, #06b6d4); color: #fff; }
.venue-tag.eccv    { background: linear-gradient(135deg, #f59e0b, #d97706); color: #fff; }
.venue-tag.iclr    { background: linear-gradient(135deg, #3b82f6, #06b6d4); color: #fff; }
.venue-tag.corl    { background: linear-gradient(135deg, #ec4899, #8b5cf6); color: #fff; }
.venue-tag.tpami   { background: linear-gradient(135deg, #2563eb, #1d4ed8); color: #fff; }
.venue-tag.scis    { background: linear-gradient(135deg, #0ea5e9, #2563eb); color: #fff; }
.venue-tag.prcv    { background: linear-gradient(135deg, #14b8a6, #0d9488); color: #fff; }
.venue-tag.arxiv   { background: var(--bg-3); color: var(--text-3); border: 1px solid var(--border); }

.pub-year {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--text-3);
}

.pub-note {
    font-family: var(--font-mono);
    font-size: 0.58rem;
    color: var(--text-3);
}

.highlight-note {
    color: var(--amber);
}

.pub-right h3 {
    font-size: 0.94rem;
    font-weight: 600;
    line-height: 1.55;
    margin-bottom: 0.45rem;
    color: var(--text);
    transition: color 0.2s;
}

.pub-item:hover .pub-right h3 { color: var(--cyan); }

.pub-authors {
    font-size: 0.82rem;
    color: var(--text-3);
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.pub-authors strong {
    color: var(--text-2);
    font-weight: 600;
}

.pub-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.pub-actions a {
    font-size: 0.78rem;
    color: var(--text-3);
    text-decoration: none;
    transition: color 0.2s;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-family: var(--font-mono);
}

.pub-actions a:hover { color: var(--amber); }

.gh-stars {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--amber);
    background: var(--amber-dim);
    padding: 0.1rem 0.35rem;
    border-radius: 3px;
    display: none;
}

.gh-stars.loaded { display: inline; }

/* ===== Service ===== */
.service-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
}

.service-block { margin-bottom: 2rem; }

.service-block h4 {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-3);
    margin-bottom: 0.9rem;
}

.journal-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.journal-badge {
    padding: 0.32rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.journal-badge.nature      { background: linear-gradient(135deg, #dc2626, #ef4444); color: #fff; }
.journal-badge.scirobotics { background: linear-gradient(135deg, #7c3aed, #dc2626); color: #fff; }
.journal-badge.tpami       { background: linear-gradient(135deg, #2563eb, #3b82f6); color: #fff; }

.conf-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.conf-list span {
    padding: 0.22rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 3px;
    font-size: 0.76rem;
    color: var(--text-2);
    font-family: var(--font-mono);
    transition: border-color 0.2s, color 0.2s;
}

.conf-list span:hover {
    border-color: var(--border-hi);
    color: var(--amber);
}

.challenge-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.challenge-entry {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    padding: 1.1rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: border-color 0.2s;
}

.challenge-entry:hover { border-color: var(--border-hi); }

.challenge-yr {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--amber);
    line-height: 1;
    min-width: 3.5rem;
    flex-shrink: 0;
}

.challenge-entry strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
    color: var(--text);
}

.challenge-entry span {
    font-size: 0.8rem;
    color: var(--text-3);
}

/* ===== Contact ===== */
.contact-intro {
    font-size: 0.975rem;
    color: var(--text-2);
    max-width: 520px;
    margin-bottom: 2.5rem;
    line-height: 1.85;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    max-width: 640px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
    padding: 2rem 1rem 1.6rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    backdrop-filter: blur(12px);
    text-decoration: none;
    color: var(--text);
    transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.contact-card:hover {
    border-color: var(--border-hi);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px var(--amber-dim);
}

.contact-card-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--amber-dim);
    color: var(--amber);
    font-size: 1.05rem;
    transition: background 0.3s, transform 0.3s var(--ease);
}

.contact-card:hover .contact-card-icon {
    background: var(--amber-glow);
    transform: scale(1.1);
}

.contact-card-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.02em;
}

.contact-card-handle {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-3);
    text-align: center;
    word-break: break-all;
}

/* ===== Footer ===== */
.footer {
    padding: 2rem 5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer span {
    font-size: 0.8rem;
    color: var(--text-3);
}

/* ===== Animations ===== */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
    .hero        { padding: 5rem 3.5rem 4rem; }
    .hero-scroll { left: 3.5rem; }
    .section     { padding: 5rem 3.5rem; }
    .footer      { padding: 2rem 3.5rem; }
}

@media (max-width: 1024px) {
    .sidebar       { display: none; }
    .mobile-header { display: flex; }
    .mobile-menu   { display: block; }
    .main-content  { margin-left: 0; }

    .hero        { padding: 6.5rem 2rem 3.5rem; }
    .hero-scroll { left: 2rem; }
    .section     { padding: 4rem 2rem; }
    .footer      { padding: 2rem; }

    .about-body    { gap: 2.5rem; }
    .service-cols  { grid-template-columns: 1fr; gap: 2.5rem; }

    .pub-item { grid-template-columns: 80px 1fr; gap: 1.75rem; margin: 0; padding-left: 0; padding-right: 0; }
}

@media (max-width: 640px) {
    .hero { padding: 6rem 1.5rem 3rem; }
    .section { padding: 3.5rem 1.5rem; }
    .footer { padding: 1.75rem 1.5rem; flex-direction: column; gap: 0.35rem; text-align: center; }

    .name-en { letter-spacing: -0.02em; }

    .hero-portrait { width: 100px; height: 100px; }

    .pub-item { grid-template-columns: 1fr; gap: 0.5rem; }
    .pub-left { flex-direction: row; align-items: center; flex-wrap: wrap; gap: 0.5rem; }

    .contact-grid { display: flex; flex-wrap: wrap; gap: 0.6rem; max-width: 100%; }
    .contact-card { flex-direction: row; padding: 0.6rem 1.1rem; border-radius: 100px; gap: 0.55rem; }
    .contact-card-icon { width: 30px; height: 30px; font-size: 0.8rem; flex-shrink: 0; }
    .contact-card-name { font-size: 0.78rem; }
    .contact-card-handle { display: none; }

    .hero-scroll { display: none; }
}