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

/* ── LIGHT THEME ── */
:root {
  --bg:     #f0ede6;
  --ink:    #0f1f3d;
  --muted:  #7a8599;
  --accent: #1a3a6b;
  --card:   #e8e4db;
  --border: #c8c4b8;
  --nav-bg: rgba(240,237,230,0.92);
  --mono:   'DM Mono', monospace;
  --serif:  'DM Serif Display', serif;
}

/* ── DARK THEME ── */
html.dark {
  --bg:     #060d1a;
  --ink:    #e8eef7;
  --muted:  #6b7d96;
  --accent: #6399d8;
  --card:   #0d1829;
  --border: #1a2840;
  --nav-bg: rgba(6,13,26,0.95);
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.35s ease, color 0.35s ease;
}

/* ── CURSOR ── */
.cursor {
  width: 10px; height: 10px;
  background-color: var(--accent);
  border-radius: 50%;
  position: fixed; top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  transition: transform 0.15s ease;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem 4rem;
  background-color: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  animation: fadeDown 0.6s ease both;
  transition: background-color 0.35s ease, border-color 0.35s ease;
}

.nav-logo { font-size: 13px; color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; }
.nav-logo span { color: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 0.75rem; }
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
  text-decoration: none; color: var(--muted);
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }

/* ── THEME TOGGLE ── */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  background-color: transparent;
  border: 1px solid var(--border);
  border-radius: 2px; cursor: pointer; font-size: 15px;
  transition: background-color 0.2s, border-color 0.2s;
}
.theme-toggle:hover { border-color: var(--accent); background-color: var(--card); }

/* ── HAMBURGER ── */
.nav-hamburger {
  display: none;
  flex-direction: column; justify-content: center; gap: 5px;
  width: 28px; height: 28px;
  background: none; border: none; cursor: pointer; padding: 0;
}
.nav-hamburger span {
  display: block; height: 1.5px;
  background-color: var(--ink);
  transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.35s ease;
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-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;
  background-color: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem;
  flex-direction: column;
  z-index: 99;
  transition: background-color 0.35s ease, border-color 0.35s ease;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  text-decoration: none; color: var(--ink);
  font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 1rem 0; border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--accent); }

/* ── SECTIONS ── */
section { padding: 7rem 4rem; max-width: 1100px; margin: 0 auto; }

/* ── HERO ── */
#hero {
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding-top: 8rem; padding-bottom: 4rem;
}
.hero-name {
  font-family: var(--serif);
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 1.05; letter-spacing: -0.02em; margin-bottom: 1.5rem;
  animation: fadeUp 0.7s 0.2s ease both;
}
.hero-name em { font-style: italic; color: var(--accent); }
.hero-sub {
  max-width: 520px; color: var(--muted);
  font-size: 14px; line-height: 1.8; margin-bottom: 3rem;
  animation: fadeUp 0.7s 0.35s ease both;
}
.hero-cta {
  display: flex; gap: 1rem; flex-wrap: wrap;
  animation: fadeUp 0.7s 0.5s ease both;
}
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase;
  text-decoration: none; border-radius: 2px;
  cursor: pointer; border: 1px solid transparent;
  transition: opacity 0.2s, border-color 0.2s, background-color 0.35s ease, color 0.35s ease;
}
.btn-primary { background-color: var(--ink); color: var(--bg); }
.btn-primary:hover { opacity: 0.8; }
.btn-ghost { background-color: transparent; color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--ink); }
.hero-scroll {
  margin-top: 5rem; display: flex; align-items: center; gap: 1rem;
  color: var(--muted); font-size: 11px; letter-spacing: 0.12em;
  animation: fadeUp 0.7s 0.65s ease both;
}
.hero-scroll::before {
  content: ''; display: block; width: 40px; height: 1px; background-color: var(--border);
}

/* ── SECTION LABELS ── */
.section-label {
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.5rem;
}
.section-desc { color: var(--muted); margin-bottom: 3.5rem; max-width: 480px; }

/* ── SKILLS ── */
#skills h2 { font-family: var(--serif); font-size: 2.5rem; margin-bottom: 0.75rem; }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1px;
  background-color: var(--border);
  border: 1px solid var(--border);
  transition: background-color 0.35s ease, border-color 0.35s ease;
}
.skill-card {
  padding: 2rem 1.75rem;
  background-color: var(--card);
  opacity: 0; transform: translateY(16px);
  transition: background-color 0.35s ease, opacity 0.5s ease, transform 0.5s ease;
}
.skill-card.visible { opacity: 1; transform: translateY(0); }
.skill-card:hover { background-color: var(--bg); }
.skill-icon { font-size: 1.5rem; margin-bottom: 1rem; }
.skill-name { font-size: 13px; font-weight: 500; margin-bottom: 0.5rem; letter-spacing: 0.04em; }
.skill-level { font-size: 11px; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 1rem; }
.skill-bar { height: 2px; background-color: var(--border); border-radius: 2px; overflow: hidden; }
.skill-fill { height: 100%; background-color: var(--accent); width: 0; transition: width 1s ease, background-color 0.35s ease; }
.skill-card.visible .skill-fill { width: var(--fill); }

/* ── PROJECTS ── */
#projects h2 { font-family: var(--serif); font-size: 2.5rem; margin-bottom: 0.75rem; }
.projects-list {
  display: flex; flex-direction: column; margin-top: 3.5rem;
  border: 1px solid var(--border);
  transition: border-color 0.35s ease;
}
.project-item {
  display: grid; grid-template-columns: 1fr auto;
  align-items: start; gap: 2rem;
  padding: 2.5rem 2rem;
  background-color: var(--card);
  border-bottom: 1px solid var(--border);
  cursor: pointer; opacity: 0; transform: translateX(-16px);
  transition: background-color 0.35s ease, border-color 0.35s ease, opacity 0.5s ease, transform 0.5s ease;
}
.project-item:last-child { border-bottom: none; }
.project-item.visible { opacity: 1; transform: translateX(0); }
.project-item:hover { background-color: var(--bg); }
.project-num { font-size: 11px; color: var(--accent); letter-spacing: 0.12em; margin-bottom: 0.5rem; }
.project-title { font-family: var(--serif); font-size: 1.5rem; margin-bottom: 0.6rem; }
.project-desc { color: var(--muted); font-size: 13px; line-height: 1.7; max-width: 520px; }
.project-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1.25rem; }
.tag {
  padding: 0.25rem 0.75rem; border: 1px solid var(--border);
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); border-radius: 2px; background-color: transparent;
  transition: border-color 0.35s ease, color 0.35s ease;
}
.project-arrow {
  font-size: 1.25rem; color: var(--muted);
  align-self: flex-start; padding-top: 0.25rem;
  transition: transform 0.2s, color 0.2s;
}
.project-item:hover .project-arrow { transform: translate(4px, -4px); color: var(--accent); }

/* ── CONTACT ── */
#contact {
  border-top: 1px solid var(--border);
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
  transition: border-color 0.35s ease;
}
#contact h2 { font-family: var(--serif); font-size: 2.5rem; margin-bottom: 0.75rem; }
#contact p { color: var(--muted); line-height: 1.8; }
.contact-links { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-link {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem 1.5rem; border: 1px solid var(--border);
  text-decoration: none; color: var(--ink); background-color: transparent;
  transition: border-color 0.2s, background-color 0.2s, color 0.35s ease;
}
.contact-link:hover { border-color: var(--accent); background-color: var(--card); }
.contact-link span { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; }
.contact-link-arrow { color: var(--muted); transition: transform 0.2s, color 0.2s; }
.contact-link:hover .contact-link-arrow { transform: translate(4px, -4px); color: var(--accent); }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border); padding: 2rem 4rem;
  background-color: var(--bg);
  display: flex; justify-content: space-between; align-items: center;
  font-size: 11px; color: var(--muted); letter-spacing: 0.08em;
  transition: background-color 0.35s ease, border-color 0.35s ease, color 0.35s ease;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── TABLET ── */
@media (max-width: 1024px) {
  nav { padding: 1.25rem 2.5rem; }
  section { padding: 6rem 2.5rem; }
  footer { padding: 1.75rem 2.5rem; }
  .hero-name { font-size: clamp(3rem, 7vw, 5.5rem); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  #contact { gap: 2.5rem; }
}

/* ── MOBILE ── */
@media (max-width: 767px) {
  nav { padding: 1rem 1.25rem; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-right { gap: 0.5rem; }
  section { padding: 5rem 1.25rem; }
  .hero-name { font-size: clamp(2.75rem, 11vw, 4rem); }
  .hero-sub { font-size: 13px; }
  .hero-scroll { margin-top: 3rem; }
  .skills-grid { grid-template-columns: 1fr; }
  .skill-card { padding: 1.5rem 1.25rem; }
  .project-item { padding: 1.75rem 1.25rem; gap: 1rem; }
  .project-title { font-size: 1.2rem; }
  #contact { grid-template-columns: 1fr; gap: 2rem; padding-top: 4rem; padding-bottom: 4rem; }
  #contact h2 { font-size: 2rem; }
  footer { padding: 1.25rem; flex-direction: column; gap: 0.4rem; text-align: center; }
  .cursor { display: none; }
}