/* ========================================
   BINXIN GAO - PERSONAL WEBSITE
   Design System + Styles
   ======================================== */

/* ----------------------------------------
   CSS Custom Properties (Design Tokens)
   ---------------------------------------- */
:root {
  /* Colors */
  --bg-primary: #FAF8F5;
  --bg-secondary: #F5F2ED;
  --bg-tertiary: #EFEBE4;
  --text-primary: #2C2A26;
  --text-secondary: #6B6560;
  --text-muted: #9A948C;
  --accent-primary: #C4785A;
  --accent-secondary: #D94A3D;
  --accent-gold: #B8956E;
  --ink-black: #1A1815;
  --border-light: #E5E0D8;
  --white: #FFFFFF;

  /* Typography */
  --font-display: 'Playfair Display', 'Noto Serif SC', Georgia, serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* Font Sizes */
  --text-xs: 0.875rem;
  --text-sm: 1rem;
  --text-base: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.125rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.25rem;
  --text-6xl: 4rem;
  --text-7xl: 4.75rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 80px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(44, 42, 38, 0.04);
  --shadow-md: 0 4px 12px rgba(44, 42, 38, 0.08);
  --shadow-lg: 0 12px 32px rgba(44, 42, 38, 0.12);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 48px;
  height: 48px;
  background-color: var(--white);
  border: 1px solid var(--border-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--white);
  transform: translateY(-2px);
}

/* ----------------------------------------
   CSS Reset & Base Styles
   ---------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
  background-color: var(--accent-primary);
  color: var(--white);
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 4px;
}

/* Links */
a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Lists */
ul,
ol {
  list-style: none;
}

/* ----------------------------------------
   Typography
   ---------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink-black);
}

h1 {
  font-size: var(--text-6xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

p {
  margin-bottom: var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

em {
  font-style: italic;
  color: var(--accent-primary);
}

/* ----------------------------------------
   Button Components
   ---------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  text-decoration: none;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn--primary {
  background-color: var(--ink-black);
  color: var(--white);
  border-color: var(--ink-black);
}

.btn--primary:hover {
  background-color: var(--text-primary);
  color: var(--white);
}

.btn--secondary {
  background-color: transparent;
  color: var(--ink-black);
  border-color: var(--border-light);
}

.btn--secondary:hover {
  border-color: var(--ink-black);
}

/* ----------------------------------------
   Navigation
   ---------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: rgba(250, 248, 245, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: transform var(--transition-base);
}

.nav--hidden {
  transform: translateY(-100%);
}

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

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--ink-black);
  letter-spacing: 0.02em;
}

.nav__logo:hover {
  color: var(--accent-primary);
}

.nav__menu {
  display: flex;
  gap: var(--space-xl);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--accent-primary);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--ink-black);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Mobile Navigation Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--ink-black);
  transition: all var(--transition-fast);
}

/* ----------------------------------------
   Hero Section
   ---------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--nav-height) var(--space-lg) var(--space-2xl);
  overflow: hidden;
}

.hero__container {
  max-width: var(--max-width);
  width: 100%;
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-3xl);
  align-items: center;
}

/* Portrait */
.hero__portrait {
  position: relative;
  justify-self: end;
  order: 2;
}

.hero__portrait-img {
  width: 100%;
  max-width: 380px;
  height: auto;
  border-radius: 2px;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-slow);
}

.hero__portrait-img:hover {
  transform: scale(1.02);
}

.hero__ink-stroke {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 140%;
  background: linear-gradient(135deg,
      transparent 0%,
      rgba(196, 120, 90, 0.03) 30%,
      rgba(184, 149, 110, 0.05) 60%,
      transparent 100%);
  transform: rotate(-12deg);
  pointer-events: none;
  opacity: 0;
  animation: inkReveal 1.5s ease-out 0.5s forwards;
}

@keyframes inkReveal {
  from {
    opacity: 0;
    transform: rotate(-12deg) translateX(20%);
  }

  to {
    opacity: 1;
    transform: rotate(-12deg) translateX(0);
  }
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__name {
  margin-bottom: var(--space-lg);
}

.hero__name-en {
  display: inline;
  font-size: clamp(var(--text-4xl), 6vw, var(--text-5xl));
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
}

.hero__name-cn {
  display: inline;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(var(--text-xl), 2.5vw, var(--text-2xl));
  font-weight: 500;
  color: var(--text-secondary);
  margin-left: var(--space-sm);
  letter-spacing: 0.1em;
}

.hero__bio {
  font-family: var(--font-display);
  font-size: clamp(var(--text-lg), 2vw, var(--text-xl));
  font-weight: 400;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: var(--space-md);
  margin-bottom: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(135deg, rgba(196, 120, 90, 0.06) 0%, rgba(184, 149, 110, 0.04) 100%);
  border-left: 2px solid var(--accent-primary);
  border-radius: 0 4px 4px 0;
}

.hero__highlight {
  color: var(--accent-gold);
  font-weight: 500;
  font-style: normal;
}

.hero__tagline {
  font-family: var(--font-display);
  font-size: clamp(var(--text-xl), 2.5vw, var(--text-2xl));
  font-weight: 400;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: var(--text-base);
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.hero__roles {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.hero__cta {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Scroll Indicator */
.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: var(--space-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.hero__scroll-indicator span {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  writing-mode: vertical-rl;
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent-primary), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {

  0%,
  100% {
    opacity: 1;
    transform: scaleY(1);
  }

  50% {
    opacity: 0.5;
    transform: scaleY(0.8);
  }
}

/* ----------------------------------------
   Section Base Styles
   ---------------------------------------- */
.section {
  padding: var(--space-4xl) var(--space-lg);
  border-top: 1px solid var(--border-light);
  position: relative;
}

.section:nth-child(even) {
  background-color: var(--bg-secondary);
}

/* Game-inspired section backgrounds (Easter eggs) */
.about {
  position: relative;
  overflow: hidden;
}

.about::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/images/journey-bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}

.about .section__container {
  position: relative;
  z-index: 1;
}

.projects {
  position: relative;
  overflow: hidden;
}

.projects::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/images/cosmos-bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0.06;
  pointer-events: none;
  z-index: 0;
}

.projects .section__container {
  position: relative;
  z-index: 1;
}

.section__container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__header {
  margin-bottom: var(--space-3xl);
}

.section__label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-4xl));
}

.section__description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-top: var(--space-sm);
}

.section__tagline {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--accent-primary);
  margin-top: var(--space-sm);
}

/* ----------------------------------------
   News Section
   ---------------------------------------- */
.news__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.news__item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-light);
}

.news__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.news__date {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--accent-gold);
  white-space: nowrap;
}

.news__text {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ----------------------------------------
   About Section
   ---------------------------------------- */
.about__content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.about__lead {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  line-height: 1.6;
  color: var(--ink-black);
  margin-bottom: var(--space-lg);
}

.about__education {
  padding-left: var(--space-lg);
  border-left: 1px solid var(--border-light);
}

.about__education-title {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.education-card {
  margin-bottom: var(--space-lg);
}

.education-card__degree {
  display: block;
  font-weight: 600;
  color: var(--ink-black);
  margin-bottom: var(--space-xs);
}

.education-card__school {
  display: block;
  font-size: var(--text-base);
  color: var(--text-secondary);
}

.education-card__year {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* Timeline */
.timeline {
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-light);
}

.timeline__title {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
}

.timeline__track {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.timeline__track::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--border-light);
}

.timeline__item {
  position: relative;
  text-align: center;
  padding-top: var(--space-lg);
}

.timeline__item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  background-color: var(--bg-primary);
  border: 2px solid var(--border-light);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.timeline__item:hover::before,
.timeline__item--current::before {
  border-color: var(--accent-primary);
  background-color: var(--accent-primary);
}

.timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--accent-primary);
  margin-bottom: var(--space-xs);
}

.timeline__label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ----------------------------------------
   Projects Section
   ---------------------------------------- */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.project-card {
  background-color: var(--white);
  border: 1px solid var(--border-light);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.project-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.project-card--featured {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--white) 100%);
}

/* Award highlight card */
.project-card--award {
  background: linear-gradient(135deg, #FDF8F0 0%, #FEF9F3 50%, #FFFCF8 100%);
  border: 2px solid var(--accent-gold);
  position: relative;
  overflow: hidden;
}

.project-card--award::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-gold), var(--accent-primary), var(--accent-gold));
}

.project-card__status--award {
  background-color: var(--accent-gold);
  color: var(--white);
  font-weight: 600;
}

.project-card__status {
  display: inline-block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  background-color: rgba(196, 120, 90, 0.1);
  padding: var(--space-xs) var(--space-sm);
  margin-bottom: var(--space-md);
}

.project-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.project-card__description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.project-card__meta {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.project-card__bullets {
  margin-top: var(--space-md);
  padding-left: var(--space-md);
}

.project-card__bullets li {
  position: relative;
  padding-left: var(--space-sm);
  margin-bottom: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.project-card__bullets li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--accent-gold);
  font-size: 0.6em;
  top: 0.4em;
}

/* About slogan */
.about__slogan {
  margin-top: var(--space-lg);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--accent-primary);
  border-left: 2px solid var(--accent-gold);
  padding-left: var(--space-md);
}

/* ----------------------------------------
   Publications Section
   ---------------------------------------- */
.publications__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.publication {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--border-light);
}

.publication:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.publication__year {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--accent-gold);
}

.publication__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

.publication__authors {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.publication__venue {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.publication__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.publication__stat {
  font-size: var(--text-sm);
  color: var(--accent-primary);
}

.publication__note {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-style: italic;
}

.publication__links {
  display: flex;
  gap: var(--space-md);
}

.publication__link {
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.publication__abstract {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: var(--space-sm);
  padding: var(--space-md);
  background-color: var(--bg-tertiary);
  border-left: 2px solid var(--accent-gold);
  font-style: italic;
}

/* ----------------------------------------
   Service Section
   ---------------------------------------- */
.service__content {
  max-width: 600px;
}

.service__role {
  font-size: var(--text-lg);
  margin-bottom: var(--space-md);
}

.service__list {
  padding-left: var(--space-lg);
}

.service__list li {
  position: relative;
  padding-left: var(--space-md);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.service__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background-color: var(--accent-gold);
  border-radius: 50%;
}

/* ----------------------------------------
   Blog Section
   ---------------------------------------- */
.blog__placeholder {
  text-align: center;
  padding: var(--space-3xl);
  background-color: var(--white);
  border: 1px dashed var(--border-light);
  color: var(--text-muted);
  font-style: italic;
}

/* ----------------------------------------
   Contact Section
   ---------------------------------------- */
.contact__content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-xl);
}

.contact__email {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--ink-black);
  margin-bottom: var(--space-sm);
  transition: color var(--transition-base);
}

.contact__email:hover {
  color: var(--accent-primary);
}

.contact__phone {
  font-size: var(--text-base);
  color: var(--text-secondary);
}

.contact__links {
  display: flex;
  gap: var(--space-lg);
}

.contact__social {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.contact__social:hover {
  color: var(--accent-primary);
}

.contact__social svg {
  width: 20px;
  height: 20px;
}

.contact__social span {
  font-size: var(--text-sm);
}

/* ----------------------------------------
   Footer
   ---------------------------------------- */
.footer {
  padding: var(--space-xl) var(--space-lg);
  background-color: var(--ink-black);
  color: var(--bg-primary);
}

.footer__container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer__copyright {
  font-size: var(--text-sm);
  opacity: 0.7;
}

.footer__tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-sm);
  opacity: 0.5;
}

/* ----------------------------------------
   Animations & Utilities
   ---------------------------------------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ----------------------------------------
   Responsive Styles
   ---------------------------------------- */
@media (max-width: 1024px) {
  .about__content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .about__education {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--border-light);
    padding-top: var(--space-xl);
  }

  .timeline__track {
    flex-wrap: wrap;
    gap: var(--space-lg);
    justify-content: flex-start;
  }

  .timeline__track::before {
    display: none;
  }

  .timeline__item {
    text-align: left;
    padding-left: var(--space-xl);
    padding-top: 0;
  }

  .timeline__item::before {
    left: 0;
    top: 50%;
    transform: translateY(-50%);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .nav__menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav__menu.active {
    opacity: 1;
    visibility: visible;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav__toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    padding-top: calc(var(--nav-height) + var(--space-xl));
  }

  .hero__container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }

  .hero__portrait {
    order: -1;
    justify-self: center;
  }

  .hero__portrait-img {
    max-width: 280px;
  }

  .hero__cta {
    flex-direction: column;
    align-items: center;
  }

  .hero__scroll-indicator {
    display: none;
  }

  .section {
    padding: var(--space-2xl) var(--space-md);
  }

  .news__item {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .publication {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .publication__year {
    font-size: var(--text-sm);
  }

  .contact__content {
    flex-direction: column;
  }

  .contact__email {
    font-size: var(--text-2xl);
  }

  .footer__container {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__name-en {
    font-size: var(--text-4xl);
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .contact__links {
    flex-direction: column;
    gap: var(--space-md);
  }
}

/* ----------------------------------------
   Print Styles
   ---------------------------------------- */
@media print {

  .nav,
  .hero__scroll-indicator,
  .hero__ink-stroke {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: var(--space-lg);
  }

  .section {
    padding: var(--space-lg);
    break-inside: avoid;
  }
}