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

:root {
  --black: #111;
  --white: #fff;
  --gray-100: #f5f5f5;
  --gray-200: #e8e8e8;
  --gray-400: #999;
  --gray-600: #666;
  --gray-800: #333;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ===== Preloader ===== */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader-inner {
  text-align: center;
}

.preloader h5 {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 1rem;
}

.preloader-text {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
}

.preloader-bar {
  width: 120px;
  height: 2px;
  background: var(--gray-200);
  margin: 0 auto;
  overflow: hidden;
  border-radius: 2px;
}

.preloader-bar span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--black);
  animation: loadBar 1.8s ease-in-out forwards;
}

@keyframes loadBar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(0); }
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text strong {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.logo-text span {
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-600);
}

.menu-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
  padding: 0.5rem;
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 22px;
}

.hamburger span {
  display: block;
  height: 2px;
  background: var(--black);
  transition: var(--transition);
}

.hamburger span:last-child {
  width: 14px;
  align-self: flex-end;
}

/* ===== Fullscreen Menu ===== */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.fullscreen-menu.open {
  opacity: 1;
  visibility: visible;
}

.menu-close {
  position: absolute;
  top: 1.5rem;
  right: 3rem;
  background: none;
  border: none;
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--black);
}

.menu-links {
  list-style: none;
}

.menu-links li {
  overflow: hidden;
}

.menu-links a {
  display: block;
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  padding: 0.3em 0;
  transition: color 0.3s ease, transform 0.5s ease;
  transform: translateY(100%);
}

.fullscreen-menu.open .menu-links a {
  transform: translateY(0);
}

.menu-links a:hover {
  color: var(--gray-400);
}

.menu-footer {
  margin-top: 4rem;
}

.menu-footer p {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.menu-footer ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.menu-footer a {
  font-size: 0.875rem;
  color: var(--gray-600);
  transition: color 0.3s;
}

.menu-footer a:hover {
  color: var(--black);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 3rem 4rem;
  overflow: hidden;
}

.hero-watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(8rem, 22vw, 18rem);
  font-weight: 800;
  color: var(--gray-100);
  letter-spacing: -0.04em;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-600);
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  margin-bottom: 1.5rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-text h5 {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 1.5rem;
}

.hero-text h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 2rem;
  text-transform: capitalize;
}

.hero-text h3 {
  font-size: clamp(0.95rem, 1.5vw, 1.125rem);
  font-weight: 400;
  line-height: 1.7;
  color: var(--gray-600);
  max-width: 480px;
}

.hero-text h3 strong {
  color: var(--black);
  font-weight: 600;
}

.hero-cta {
  margin-top: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.link-arrow {
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  padding-bottom: 2px;
}

.link-arrow::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--black);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s ease;
}

.link-arrow:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.cta-or {
  font-size: 0.875rem;
  color: var(--gray-400);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  width: clamp(260px, 32vw, 380px);
  height: clamp(320px, 40vw, 460px);
  object-fit: cover;
  object-position: top center;
  border-radius: 12px;
  filter: grayscale(100%);
  transition: filter 0.6s ease;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.12);
}

.hero-image img:hover {
  filter: grayscale(0%);
}

.contact-float {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  z-index: 50;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-600);
  transition: background 0.3s, color 0.3s, transform 0.3s;
}

.contact-float:hover {
  background: var(--black);
  color: var(--white);
  transform: scale(1.08);
}

/* ===== Sections ===== */
.section {
  padding: 6rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label h5 {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

.section-label h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 3rem;
}

.section-footer {
  margin-top: 3rem;
  text-align: center;
}

/* ===== Projects & Portfolio ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.project-card {
  position: relative;
  padding: 2.5rem;
  background: var(--gray-100);
  border-radius: 4px;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.project-thumb {
  margin: -2.5rem -2.5rem 1.75rem -2.5rem;
  height: 220px;
  overflow: hidden;
  background: var(--gray-200);
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.project-card:hover .project-thumb img {
  transform: scale(1.06);
}

.project-card .badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-600);
  margin-bottom: 1rem;
}

.project-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.project-card .meta {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-bottom: 1.25rem;
}

.project-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--gray-600);
  margin-bottom: 1.5rem;
}

.project-card .view-link {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap 0.3s;
}

.project-card:hover .view-link {
  gap: 0.75rem;
}

.project-card .lang-tag {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 20px;
  color: var(--black);
  z-index: 2;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.portfolio-actions {
  margin-top: 3.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* ===== Stats ===== */
.stats {
  background: var(--gray-100);
  max-width: none;
  padding-left: 3rem;
  padding-right: 3rem;
}

.stats .section-label,
.stats-grid {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2rem;
}

.stat-card {
  text-align: center;
  padding: 2rem 1rem;
}

.stat-number {
  display: block;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
  line-height: 1.5;
}

.stat-plus {
  font-size: 0.6em;
}

.stat-ai span {
  font-size: 0.55em;
  letter-spacing: 0.05em;
}

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.skill-card {
  padding: 2rem;
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  transition: border-color 0.3s, transform 0.3s;
}

.skill-card:hover {
  border-color: var(--black);
  transform: translateY(-2px);
}

.skill-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tags span {
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  background: var(--gray-100);
  border-radius: 20px;
  color: var(--gray-600);
}

/* ===== Honors ===== */
.honors {
  background: var(--gray-100);
  max-width: none;
}

.honors .section-label,
.honors-grid {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.honors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
  padding: 0 3rem 6rem;
}

.honor-card {
  padding: 2rem;
  background: var(--white);
  border-radius: 4px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.honor-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.06);
}

.honor-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  line-height: 1.4;
}

.honor-year {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

.honor-card p:last-child {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--gray-600);
}

/* ===== About ===== */
.about-content {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.about-text p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--gray-600);
  margin-bottom: 1.25rem;
}

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

.about-details {
  list-style: none;
  margin-top: 2rem;
}

.about-details li {
  font-size: 0.9rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-600);
}

.about-details strong {
  color: var(--black);
  margin-right: 0.5rem;
}

.about-details a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about-image img {
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  border-radius: 12px;
  filter: grayscale(30%);
}

/* ===== Contact ===== */
.contact-content {
  max-width: 600px;
}

.contact-content p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--gray-600);
  margin-bottom: 1.5rem;
}

.contact-info {
  list-style: none;
  margin-bottom: 2rem;
}

.contact-info li {
  font-size: 0.95rem;
  color: var(--gray-600);
}

.contact-info a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  background: var(--black);
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 4px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.contact-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.contact-btn-outline {
  background: transparent;
  color: var(--black);
  border: 1px solid var(--black);
}

.contact-btn-outline:hover {
  background: var(--black);
  color: var(--white);
}

/* ===== Footer ===== */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem 3rem;
  border-top: 1px solid var(--gray-200);
  font-size: 0.8rem;
  color: var(--gray-400);
}

.footer a {
  color: var(--gray-600);
  transition: color 0.3s;
}

.footer a:hover {
  color: var(--black);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ===== Scroll Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .header {
    padding: 1.25rem 1.5rem;
  }

  .hero {
    padding: 7rem 1.5rem 3rem;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text h3 {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-image {
    order: -1;
  }

  .hero-image img {
    width: 220px;
    height: 280px;
  }

  .hero-watermark {
    font-size: clamp(4rem, 18vw, 8rem);
  }

  .section {
    padding: 4rem 1.5rem;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .about-image {
    order: -1;
  }

  .about-image img {
    max-width: 200px;
  }

  .projects-grid,
  .skills-grid,
  .honors-grid {
    grid-template-columns: 1fr;
  }

  .honors-grid {
    padding: 0 1.5rem 4rem;
  }

  .contact-links {
    flex-direction: column;
  }

  .status-badge {
    margin-left: auto;
    margin-right: auto;
  }

  .menu-close {
    right: 1.5rem;
  }

  .footer {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
    padding: 2rem 1.5rem;
  }
}