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

:root {
  --black: #0d0d0d;
  --white: #fafaf9;
  --gray-50: #f7f6f4;
  --gray-100: #eeece9;
  --gray-300: #c9c6c0;
  --gray-500: #8a8680;
  --gray-700: #4a4845;
  --accent: #1a1a2e;
  --accent-warm: #c8a96e;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --radius: 12px;
  --radius-sm: 6px;
  --transition: 0.25s ease;
  --max-w: 1100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ========================
   NAV
   ======================== */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2.5rem;
  background: rgba(250, 250, 249, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-100);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--black);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--gray-700);
  text-decoration: none;
  font-weight: 400;
  transition: color var(--transition);
  letter-spacing: 0.02em;
}

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

.lang-toggle {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  background: var(--black);
  color: var(--white);
  border: none;
  border-radius: 20px;
  padding: 0.35rem 0.85rem;
  cursor: pointer;
  transition: background var(--transition);
}
.lang-toggle:hover { background: var(--gray-700); }

/* ========================
   HERO
   ======================== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 420px;
  align-items: center;
  gap: 4rem;
  padding: 8rem 2.5rem 4rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 1.25rem;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: var(--black);
}

.hero-name em {
  font-style: italic;
  color: var(--gray-700);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 460px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  background: var(--black);
  color: var(--white);
  padding: 0.85rem 2rem;
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: transform var(--transition), background var(--transition);
  letter-spacing: 0.02em;
}
.btn-primary:hover { background: var(--gray-700); transform: translateY(-1px); }

.btn-ghost {
  display: inline-block;
  background: transparent;
  color: var(--black);
  padding: 0.85rem 2rem;
  border-radius: 40px;
  border: 1px solid var(--gray-300);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
  letter-spacing: 0.02em;
}
.btn-ghost:hover { border-color: var(--black); transform: translateY(-1px); }

.hero-photo {
  position: relative;
}

.hero-photo::before {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  background: var(--gray-100);
  z-index: 0;
}

.hero-photo img {
  position: relative;
  z-index: 1;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  filter: grayscale(15%);
}

/* ========================
   SECTIONS
   ======================== */
.section {
  padding: 6rem 2.5rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-header {
  margin-bottom: 3rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-warm);
  margin-bottom: 0.75rem;
}

.section-header h2,
.section-about h2,
.section-contact h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* ========================
   PROJECTS
   ======================== */
#projects {
  background: var(--gray-50);
  max-width: 100%;
  padding: 6rem 0;
}

#projects .section-header {
  max-width: var(--max-w);
  margin: 0 auto 3rem;
  padding: 0 2.5rem;
}

.projects-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeUp 0.5s ease both;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.project-card:nth-child(2) { animation-delay: 0.1s; }
.project-card:nth-child(3) { animation-delay: 0.2s; }
.project-card:nth-child(4) { animation-delay: 0.3s; }
.project-card:nth-child(5) { animation-delay: 0.4s; }

.project-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--black);
  text-decoration: none;
}
.project-name:hover { color: var(--gray-700); }

.project-desc {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.6;
  flex: 1;
}

.project-lang {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--gray-100);
  color: var(--gray-700);
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  letter-spacing: 0.03em;
}

.project-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.project-links a {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--black);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  border-bottom: 1px solid var(--gray-300);
  padding-bottom: 1px;
  transition: border-color var(--transition);
}
.project-links a:hover { border-color: var(--black); }

.project-skeleton {
  height: 200px;
  background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-50) 50%, var(--gray-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.project-card--featured {
  border: 1.5px solid var(--accent-warm);
  grid-column: span 2;
}

@media (max-width: 700px) {
  .project-card--featured { grid-column: span 1; }
}

.project-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.project-type {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.3rem;
}

.project-badge {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: var(--accent-warm);
  color: var(--white);
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  white-space: nowrap;
}

.project-highlights {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin: 0.25rem 0;
}

.project-highlights li {
  font-size: 0.82rem;
  color: var(--gray-700);
  padding-left: 1rem;
  position: relative;
  line-height: 1.5;
}
.project-highlights li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-warm);
  font-size: 0.72rem;
  top: 2px;
}

.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--gray-100);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project-tag {
  font-size: 0.72rem;
  font-weight: 500;
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  color: var(--gray-700);
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
}

.project-github {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-500);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
  transition: color var(--transition);
}
.project-github:hover { color: var(--black); }

/* ========================
   ABOUT
   ======================== */
.section-about {
  border-top: 1px solid var(--gray-100);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-left p {
  color: var(--gray-700);
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.75;
  font-weight: 300;
}

.about-left h2 { margin-bottom: 1.5rem; }

.experience-block { margin-top: 2rem; }

.exp-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1.25rem;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-warm);
}

.exp-role {
  font-weight: 500;
  font-size: 0.95rem;
}

.exp-company {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.exp-date {
  font-size: 0.8rem;
  color: var(--gray-500);
  font-weight: 300;
}

.exp-list {
  list-style: none;
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.exp-list li {
  font-size: 0.85rem;
  color: var(--gray-700);
  padding-left: 1rem;
  position: relative;
}
.exp-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-warm);
  font-size: 0.75rem;
}

.skills-block { margin-bottom: 1.75rem; }

.skills-block h4 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.75rem;
}

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

.skills-tags span {
  font-size: 0.8rem;
  font-weight: 400;
  background: var(--white);
  border: 1px solid var(--gray-200, #e0ddd8);
  color: var(--gray-700);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  transition: background var(--transition), border-color var(--transition);
}
.skills-tags span:hover {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

/* ========================
   CONTACT
   ======================== */
.section-contact {
  background: var(--black);
  max-width: 100%;
  padding: 6rem 2.5rem;
}

.contact-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-contact .section-tag { color: var(--accent-warm); }

.section-contact h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--white);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-contact p {
  color: var(--gray-300);
  font-size: 1rem;
  font-weight: 300;
  margin-bottom: 2.5rem;
}

.contact-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--white);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding-bottom: 3px;
  transition: border-color var(--transition);
}
.contact-item:hover { border-color: var(--white); }

/* ========================
   FOOTER
   ======================== */
footer {
  background: var(--black);
  color: var(--gray-500);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

/* ========================
   RESPONSIVE
   ======================== */
@media (max-width: 900px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { gap: 1.25rem; }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 7rem 1.5rem 3rem;
    gap: 2.5rem;
  }
  .hero-text { order: 2; }
  .hero-photo { order: 1; width: 200px; margin: 0 auto; }
  .hero-sub { margin: 0 auto 2rem; }
  .hero-actions { justify-content: center; }
  .hero-name { font-size: 3rem; }

  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .section { padding: 4rem 1.5rem; }
  .projects-grid { padding: 0 1.5rem; }
  #projects .section-header { padding: 0 1.5rem; }
  .contact-links { flex-direction: column; gap: 1.25rem; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2.4rem; }
  .nav-links a { display: none; }
  .lang-toggle { margin-left: auto; }
}