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

:root {
  --bg: #000;
  --fg: #fff;
  --fg-dim: rgba(255,255,255,0.45);
  --fg-muted: rgba(255,255,255,0.18);
  --fg-faint: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.12);
  --border-bright: rgba(255,255,255,0.8);
  --accent: #fff;
  --mono: 'JetBrains Mono', monospace;
  --display: 'Unbounded', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  overflow-x: hidden;
  cursor: crosshair;
}

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

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 2px; }
::-webkit-scrollbar-track { background: #000; }
::-webkit-scrollbar-thumb { background: #fff; }

/* ─── NAV ─── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  height: 56px;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(12px);
}

.nav-logo {
  font-family: var(--display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
}

.nav-links a {
  font-size: 9px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--fg-dim);
  transition: color .2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -3px;
  width: 0; height: 1px;
  background: #fff;
  transition: width .3s;
}

.nav-links a:hover { color: #fff; }
.nav-links a:hover::after { width: 100%; }

.nav-lang {
  display: flex;
  gap: 4px;
}

.lang-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 2px;
  padding: 4px 8px;
  cursor: pointer;
  transition: all .2s;
}

.lang-btn.active,
.lang-btn:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255,255,255,0.06);
}

/* ─── HERO ─── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 56px 40px 0;
  position: relative;
  overflow: hidden;
}

.hero-kanji {
  position: absolute;
  right: -40px;
  bottom: -60px;
  font-size: 500px;
  font-weight: 700;
  color: rgba(255,255,255,0.03);
  line-height: 1;
  user-select: none;
  pointer-events: none;
  z-index: 0;
}

.hero-kanji2 {
  position: absolute;
  left: -20px;
  top: 80px;
  font-size: 280px;
  font-weight: 700;
  color: rgba(255,255,255,0.025);
  line-height: 1;
  user-select: none;
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 9px;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 32px;
  opacity: 0;
  animation: fadeUp .6s forwards .1s;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--fg-dim);
}

.hero-name {
  font-family: var(--display);
  font-size: clamp(52px, 9vw, 110px);
  font-weight: 900;
  line-height: .95;
  letter-spacing: -2px;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeUp .7s forwards .2s;
}

.hero-name .sub {
  display: block;
  font-size: clamp(22px, 4vw, 46px);
  font-weight: 300;
  color: var(--fg-dim);
  letter-spacing: 8px;
  margin-top: 8px;
}

.hero-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 40px 0;
  position: relative;
  opacity: 0;
  animation: fadeUp .6s forwards .35s;
}

.hero-divider::before,
.hero-divider::after {
  content: '';
  position: absolute;
  top: -3px;
  width: 7px; height: 7px;
  background: #fff;
}
.hero-divider::before { left: 0; }
.hero-divider::after  { right: 0; }

.hero-desc {
  font-size: 12px;
  line-height: 2;
  color: var(--fg-dim);
  max-width: 540px;
  opacity: 0;
  animation: fadeUp .6s forwards .45s;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-top: 40px;
  opacity: 0;
  animation: fadeUp .6s forwards .55s;
}

.btn {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 4px;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 1px solid rgba(255,255,255,0.5);
  background: none;
  color: var(--fg-dim);
  cursor: pointer;
  transition: all .25s;
  display: inline-block;
}

.btn:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255,255,255,0.05);
}

.btn-primary {
  background: #fff;
  color: #000;
  border-color: #fff;
}

.btn-primary:hover {
  background: rgba(255,255,255,0.85);
  color: #000;
}

.hero-meta {
  position: absolute;
  right: 40px;
  bottom: 60px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: right;
  opacity: 0;
  animation: fadeUp .6s forwards .65s;
}

.hero-meta-item {
  font-size: 8px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.scroll-hint {
  position: absolute;
  left: 40px;
  bottom: 50px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0;
  animation: fadeUp .6s forwards .75s;
}

.scroll-hint span {
  font-size: 7px;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--fg-muted);
  writing-mode: vertical-rl;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--fg-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ─── SECTIONS COMMON ─── */
section {
  padding: 120px 40px;
  position: relative;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 72px;
}

.section-num {
  font-family: var(--display);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 4px;
  color: var(--fg-muted);
}

.section-title {
  font-family: var(--display);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  letter-spacing: -1px;
  text-transform: uppercase;
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--border);
  position: relative;
}

.section-line::after {
  content: '';
  position: absolute;
  right: 0; top: -2px;
  width: 5px; height: 5px;
  background: var(--fg-muted);
}

/* ─── ABOUT ─── */
#about { border-top: 1px solid var(--border); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text p {
  font-size: 12px;
  line-height: 2.2;
  color: var(--fg-dim);
  margin-bottom: 24px;
}

.about-text strong { color: #fff; font-weight: 500; }

.about-quote {
  border-left: 2px solid rgba(255,255,255,0.3);
  padding: 16px 20px;
  font-size: 11px;
  line-height: 2;
  color: rgba(255,255,255,0.5);
  letter-spacing: 1px;
  margin: 32px 0;
  font-style: italic;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.stat-card {
  border: 1px solid var(--border);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  transition: border-color .3s;
}

.stat-card:hover { border-color: rgba(255,255,255,0.4); }

.stat-num {
  font-family: var(--display);
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 8px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--fg-muted);
}

/* ─── SKILLS ─── */
#skills { border-top: 1px solid var(--border); }

.skills-rows {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.skill-row {
  display: grid;
  grid-template-columns: 28px 90px 1px 1fr;
  align-items: center;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.skill-row:first-child { border-top: 1px solid var(--border); }

.skill-num {
  font-family: var(--display);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 2px;
  color: var(--fg-muted);
}

.skill-cat {
  font-size: 8px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
}

.skill-sep {
  height: 16px;
  background: var(--border);
  width: 1px;
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
}

.skill-item {
  font-size: 11px;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.5px;
}

.skill-item--bright {
  color: #fff;
  font-weight: 500;
}

.skill-dot {
  width: 2px; height: 2px;
  border-radius: 50%;
  background: var(--fg-muted);
  display: inline-block;
}

/* ─── PROJECTS ─── */
#projects { border-top: 1px solid var(--border); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.project-card {
  border: 1px solid var(--border);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  transition: border-color .3s, background .3s;
  cursor: default;
}

.project-card:hover {
  border-color: rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.02);
}

.project-card::before {
  content: attr(data-num);
  position: absolute;
  top: 20px;
  right: 24px;
  font-family: var(--display);
  font-size: 48px;
  font-weight: 900;
  color: rgba(255,255,255,0.04);
  line-height: 1;
}

.project-year {
  font-size: 8px;
  letter-spacing: 4px;
  color: var(--fg-muted);
  margin-bottom: 16px;
}

.project-title {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
  line-height: 1.3;
}

.project-desc {
  font-size: 11px;
  line-height: 2;
  color: var(--fg-dim);
  margin-bottom: 24px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tech-tag {
  font-size: 8px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  padding: 4px 8px;
}

/* ─── CONTACTS ─── */
#contacts { border-top: 1px solid var(--border); }

.contacts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-intro {
  font-size: 12px;
  line-height: 2.2;
  color: var(--fg-dim);
  margin-bottom: 48px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: background .2s;
}

.contact-link:first-child { border-top: 1px solid var(--border); }

.contact-link:hover .contact-link-label { color: #fff; }
.contact-link:hover .contact-link-arrow { opacity: 1; transform: translateX(4px); }

.contact-link-icon {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--fg-muted);
  width: 20px;
}

.contact-link-body { flex: 1; }

.contact-link-label {
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--fg-dim);
  display: block;
  transition: color .2s;
}

.contact-link-value {
  font-size: 11px;
  color: var(--fg-muted);
  margin-top: 4px;
  display: block;
}

.contact-link-arrow {
  font-size: 12px;
  color: var(--fg-muted);
  opacity: 0;
  transition: all .2s;
}

/* ─── TERMINAL ─── */
.terminal {
  border: 1px solid var(--border);
  font-size: 11px;
  overflow: hidden;
}

.terminal-bar {
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.t-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
}
.t-dot-r { background: #555; }
.t-dot-y { background: #555; }
.t-dot-g { background: #555; }

.terminal-title {
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--fg-muted);
  margin-left: 8px;
}

.terminal-body {
  padding: 24px;
  min-height: 220px;
  line-height: 1.8;
  color: rgba(255,255,255,0.6);
}

.t-line { display: block; margin-bottom: 4px; }
.t-prompt { color: rgba(255,255,255,0.2); margin-right: 8px; }
.t-cmd { color: rgba(255,255,255,0.7); }
.t-comment { color: rgba(255,255,255,0.2); }
.t-out { color: rgba(255,255,255,0.45); padding-left: 18px; }
.t-cursor {
  display: inline-block;
  width: 7px; height: 12px;
  background: #fff;
  animation: blink 1s step-end infinite;
  vertical-align: middle;
  margin-left: 2px;
}

/* ─── CERTIFICATES ─── */
#certificates { border-top: 1px solid var(--border); }

.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.cert-card {
  border: 1px solid var(--border);
  padding: 28px 24px;
  transition: border-color .3s, background .3s;
}

.cert-card:hover {
  border-color: rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.02);
}

.cert-name {
  font-family: var(--display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.cert-meta {
  font-size: 8px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-muted);
  line-height: 2;
  margin-bottom: 20px;
}

.cert-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 8px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--fg-dim);
  border: 1px solid var(--border);
  padding: 8px 14px;
  transition: all .2s;
}

.cert-link:hover {
  border-color: #fff;
  color: #fff;
}

/* ─── FOOTER ─── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--fg-muted);
  text-transform: uppercase;
}

.footer-right {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--fg-muted);
  text-transform: uppercase;
}

.footer-right a {
  color: var(--fg-dim);
  transition: color .2s;
}
.footer-right a:hover { color: #fff; }

/* ─── REVEAL ─── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s ease, transform .7s ease;
}

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

/* ─── ANIMATIONS ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 1; }
}

/* ─── HAMBURGER ─── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 1px;
  background: #fff;
  transition: all .3s;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  nav { padding: 0 20px; }

  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: fixed;
    top: 56px; left: 0; right: 0;
    background: #000;
    flex-direction: column;
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
    gap: 20px;
  }

  .nav-links.open { display: flex; }

  section { padding: 80px 20px; }
  #hero { padding: 56px 20px 0; }

  .about-grid,
  .contacts-grid { grid-template-columns: 1fr; gap: 48px; }

  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr 1fr; }

  .hero-meta { position: static; margin-top: 48px; text-align: left; }
  .scroll-hint { display: none; }

  footer { flex-direction: column; gap: 12px; text-align: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .certs-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-name { font-size: 42px; }
}