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

:root {
  --bg:      #1c1c1c;
  --surface: #242424;
  --line:    #323232;
  --ink:     #e8e6e2;
  --mid:     #7a7874;
  --dim:     #4a4846;
  --mono:    'DM Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  overflow-x: hidden;
}

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.8rem 4rem;
  background: rgba(28,28,28,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, padding 0.3s;
}
nav.scrolled { border-color: var(--line); padding: 1.2rem 4rem; }

.nav-logo {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--ink);
  text-decoration: none;
}
.nav-logo span { color: var(--mid); }

.nav-links { display: flex; gap: 2.5rem; list-style: none; align-items: center; }
.nav-links a {
  color: var(--mid);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 200;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.25s, opacity 0.25s;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
}
.lang-btn {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 0.35rem 0.7rem;
  background: transparent;
  border: none;
  color: var(--dim);
  cursor: pointer;
  transition: all 0.18s;
  text-transform: uppercase;
}
.lang-btn.active {
  background: var(--ink);
  color: var(--bg);
}
.lang-btn:not(.active):hover { color: var(--ink); }

.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 8rem 4rem 4rem;
  gap: 5rem;
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--mid);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.1s forwards;
}

.hero-name {
  font-size: clamp(3.5rem, 7vw, 6.5rem);
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: -0.02em;
  opacity: 0;
  animation: fadeUp 0.7s 0.25s forwards;
}
.hero-name em { font-style: italic; color: var(--mid); }

.hero-tagline {
  margin-top: 2.5rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mid);
  max-width: 420px;
  font-weight: 300;
  opacity: 0;
  animation: fadeUp 0.7s 0.4s forwards;
}

.hero-cta {
  margin-top: 3rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  opacity: 0;
  animation: fadeUp 0.7s 0.55s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.22s;
  font-weight: 400;
}
.btn-solid { background: var(--ink); color: var(--bg); }
.btn-solid:hover { background: #ccc9c4; }
.btn-ghost {
  background: transparent;
  color: var(--mid);
  border: 1px solid var(--line);
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink); }

.hero-image-wrap {
  opacity: 0;
  animation: fadeIn 1s 0.2s forwards;
}

.hero-img {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 4/5;
  object-fit: cover;
  object-position: center top;
  display: block;
  filter: grayscale(100%) brightness(0.85) contrast(1.05);
  transition: filter 0.4s;
}
.hero-img:hover { filter: grayscale(50%) brightness(0.9) contrast(1.05); }

.hero-social {
  margin-top: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--dim);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.72rem;
  transition: color 0.2s;
}
.hero-social:hover { color: var(--ink); }
.hero-social svg { width: 16px; height: 16px; fill: currentColor; flex-shrink: 0; }

section { padding: 7rem 4rem; }

.section-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 4rem;
}
.section-num { font-family: var(--mono); font-size: 0.7rem; color: var(--dim); }
.section-label { font-size: 0.72rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--mid); }
.section-line { flex: 1; height: 1px; background: var(--line); }

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 3rem;
}
.section-title em { font-style: italic; color: var(--mid); }

.divider { height: 1px; background: var(--line); margin: 0 4rem; }

#skills { background: var(--surface); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
}

.skill-card {
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 0.2s;
}
.skill-card:nth-child(4n) { border-right: none; }
.skill-card:nth-child(n+5) { border-bottom: none; }
.skill-card:hover { background: var(--bg); }

.skill-icon { width: 28px; height: 28px; color: var(--mid); }
.skill-icon svg { width: 100%; height: 100%; }
.skill-name { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.06em; color: var(--ink); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
}

.project-card {
  padding: 3rem 2.5rem;
  border-right: 1px solid var(--line);
  transition: background 0.2s;
}
.project-card:last-child { border-right: none; }
.project-card:hover { background: var(--surface); }

.project-num { font-family: var(--mono); font-size: 0.65rem; color: var(--dim); margin-bottom: 2rem; }
.project-title { font-size: 1.4rem; font-weight: 400; letter-spacing: -0.01em; margin-bottom: 1rem; }
.project-desc { font-size: 0.88rem; line-height: 1.8; color: var(--mid); margin-bottom: 2rem; font-weight: 300; }
.project-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag { font-family: var(--mono); font-size: 0.65rem; padding: 0.25rem 0.6rem; background: var(--line); color: var(--mid); }

#about { background: var(--surface); }
.about-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 7rem; align-items: start; }

.about-text p { font-size: 1rem; line-height: 1.9; color: var(--mid); margin-bottom: 1.5rem; font-weight: 300; }
.about-text p strong { color: var(--ink); font-weight: 500; }
.about-github-btn { margin-top: 1.5rem; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.stat-box { background: var(--surface); padding: 2rem 1.5rem; }
.stat-num { font-size: 2.8rem; font-weight: 300; letter-spacing: -0.03em; line-height: 1; margin-bottom: 0.4rem; }
.stat-label { font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--dim); }

#reviews { background: var(--bg); }

.reviews-avg {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  margin-bottom: 3.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--line);
}
.avg-num { font-size: 4rem; font-weight: 300; letter-spacing: -0.04em; line-height: 1; }
.avg-details { display: flex; flex-direction: column; gap: 0.3rem; }
.avg-stars { font-size: 1rem; color: var(--ink); letter-spacing: 0.1em; }
.avg-count { font-family: var(--mono); font-size: 0.7rem; color: var(--dim); }

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  border: 1px solid var(--line);
  margin-bottom: 5rem;
}

.review-card { padding: 2rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.review-stars { font-size: 0.75rem; color: var(--ink); margin-bottom: 1rem; letter-spacing: 0.1em; }
.review-comment { font-size: 0.9rem; line-height: 1.75; color: var(--mid); margin-bottom: 1.5rem; font-weight: 300; }
.review-author { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em; color: var(--ink); }
.review-date { font-family: var(--mono); font-size: 0.65rem; color: var(--dim); margin-top: 0.2rem; }

.no-reviews {
  text-align: center;
  color: var(--dim);
  padding: 4rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  border: 1px solid var(--line);
  margin-bottom: 5rem;
}

.review-form-wrap { max-width: 520px; }
.form-title { font-size: 1.6rem; font-weight: 300; letter-spacing: -0.02em; margin-bottom: 2.5rem; }

.form-group { margin-bottom: 1.8rem; }
.form-group label {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 0.6rem;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--ink);
  padding: 0.9rem 1.1rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 300;
  outline: none;
  transition: border-color 0.2s;
  resize: vertical;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--ink); }

.star-rating { display: flex; gap: 0.4rem; flex-direction: row-reverse; justify-content: flex-end; }
.star-rating input { display: none; }
.star-rating label { font-size: 1.6rem; color: var(--line); cursor: pointer; transition: color 0.15s; line-height: 1; }
.star-rating label:hover,
.star-rating label:hover ~ label,
.star-rating input:checked ~ label { color: var(--ink); }

.form-msg { margin-top: 1rem; font-family: var(--mono); font-size: 0.78rem; padding: 0.75rem 1rem; display: none; }
.form-msg.success { background: #1a2e1a; color: #7abf7a; border: 1px solid #2d4d2d; }
.form-msg.error { background: #2e1a1a; color: #bf7a7a; border: 1px solid #4d2d2d; }

footer {
  background: #141414;
  color: var(--dim);
  padding: 3rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-logo { font-family: var(--mono); font-size: 0.85rem; color: var(--ink); }
.footer-copy { font-family: var(--mono); font-size: 0.7rem; opacity: 0.5; }
.footer-socials { display: flex; gap: 1.2rem; align-items: center; }
.footer-social-link { display: flex; align-items: center; gap: 0.4rem; font-family: var(--mono); font-size: 0.75rem; color: var(--ink); opacity: 0.6; text-decoration: none; transition: opacity 0.2s; }
.footer-social-link:hover { opacity: 1; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
  nav { padding: 1.2rem 1.5rem; }
  nav.scrolled { padding: 0.9rem 1.5rem; }

  .nav-links { gap: 1.5rem; }

  .hero { grid-template-columns: 1fr; padding: 6rem 1.5rem 3rem; gap: 3rem; }
  .hero-image-wrap { order: -1; }
  .hero-img { max-width: 260px; }

  section { padding: 5rem 1.5rem; }
  .divider { margin: 0 1.5rem; }

  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .skill-card:nth-child(2n) { border-right: none; }
  .skill-card:nth-child(4n) { border-right: 1px solid var(--line); }

  .projects-grid { grid-template-columns: 1fr; }
  .project-card { border-right: none; border-bottom: 1px solid var(--line); }
  .project-card:last-child { border-bottom: none; }

  .about-grid { grid-template-columns: 1fr; gap: 3rem; }

  footer { padding: 2rem 1.5rem; }
}

@media (max-width: 600px) {
  nav { padding: 1rem 1.2rem; }
  nav.scrolled { padding: 0.8rem 1.2rem; }

  .nav-hamburger {
    display: flex;
    position: relative;
    z-index: 9999;
  }

  .nav-links {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 100dvh;
    background: #111;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0;
    list-style: none;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 9000;
    padding: 0;
    margin: 0;
  }
  .nav-links.open {
    transform: translateX(0);
  }
  .nav-links > li {
    width: 100%;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav-links > li:first-child {
    border-top: 1px solid rgba(255,255,255,0.06);
  }
  .nav-links > li > a {
    display: block;
    padding: 1.4rem 2rem;
    font-size: 1rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink);
  }
  .nav-links .lang-toggle {
    padding: 1.4rem 2rem;
    justify-content: center;
  }

  .hero { padding: 5.5rem 1.2rem 2.5rem; gap: 2rem; }
  .hero-img { max-width: 200px; }
  .hero-name { font-size: clamp(2.8rem, 13vw, 4rem); }
  .hero-tagline { font-size: 0.92rem; margin-top: 1.5rem; }
  .hero-cta { margin-top: 2rem; gap: 0.8rem; }
  .btn { padding: 0.75rem 1.4rem; font-size: 0.78rem; }

  section { padding: 3.5rem 1.2rem; }
  .divider { margin: 0 1.2rem; }

  .section-meta { margin-bottom: 2.5rem; gap: 1rem; }
  .section-title { margin-bottom: 2rem; }

  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .skill-card { padding: 1.5rem 1.2rem; }

  .project-card { padding: 2rem 1.5rem; }

  .stat-box { padding: 1.5rem 1rem; }
  .stat-num { font-size: 2.2rem; }

  .about-grid { gap: 2rem; }

  .reviews-grid { grid-template-columns: 1fr; }
  .review-card { border-right: none; }
  .avg-num { font-size: 3rem; }
  .no-reviews { padding: 2.5rem 1.2rem; }
  .review-form-wrap { max-width: 100%; }
  .form-title { font-size: 1.3rem; margin-bottom: 1.8rem; }

  footer {
    padding: 1.5rem 1.2rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}