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

:root {
  --bg: #0a0a0a;
  --surface: #111;
  --border: #222;
  --text: #e8e3db;
  --muted: #5a5550;
  --accent: #c8f060;
  --accent2: #ff6b35;
  --fd: 'Bebas Neue', sans-serif;
  --fs: 'Instrument Serif', serif;
  --fm: 'Inter', sans-serif;
  --c-sahil: #c8f060;
  --c-kumar: #e8e3db;
  --c-kunwar: #ff6b35;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--fm);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Language system ── */
/* By default show EN, hide JP */
[data-en], [data-jp] { display: none; }
body[data-lang="en"] [data-en] { display: revert; }
body[data-lang="jp"] [data-jp] { display: revert; }
/* For inline elements */
[data-en-inline], [data-jp-inline] { display: none; }
body[data-lang="en"] [data-en-inline] { display: inline; }
body[data-lang="jp"] [data-jp-inline] { display: inline; }

/* ── Nav ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px clamp(16px, 4vw, 48px);
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-links {
  display: flex;
  gap: clamp(20px, 4vw, 36px);
  list-style: none;
  white-space: nowrap;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: color 0.2s;
}

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

.lang-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  flex-shrink: 0;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-family: var(--fm);
  font-size: 0.6rem;
  letter-spacing: 1.5px;
  padding: 5px 10px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  text-transform: uppercase;
  min-width: 32px;
  text-align: center;
}

.lang-btn.active {
  background: var(--accent);
  color: #000;
  font-weight: 500;
}

.nav-links a.active { color: var(--accent); }

/* ── Hero ── */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 24px;
  padding: clamp(90px, 16vh, 140px) clamp(28px, 5vw, 80px) clamp(40px, 7vw, 72px);
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  align-items: flex-start;
}

.hero-tag {
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.2s forwards;
  max-width: 760px;
}

.hero-name {
  font-size: clamp(38px, 7vw, 90px);
  line-height: 0.95;
  color: var(--text);
  opacity: 0;
  animation: fadeUp 0.7s ease 0.35s forwards;
  max-width: 100%;
  overflow-wrap: break-word;
}

.en-name {
  font-family: var(--fd);
  letter-spacing: -1px;
}

.jp-name {
  font-family: var(--fm);
  font-weight: 700;
  letter-spacing: -2px;
  font-size: clamp(34px, 7vw, 80px);
}

.hero-name em {
  font-family: var(--fs);
  font-style: italic;
  display: block;
}

.jp-name em { font-family: inherit; font-style: normal; }

.n-sahil { color: var(--c-sahil); font-weight: 700; }
.n-kumar  { color: var(--c-kumar); }
.n-kunwar { color: var(--c-kunwar); }

.hero-name-jp {
  font-family: var(--fm);
  font-size: clamp(14px, 3.5vw, 28px);
  letter-spacing: 6px;
  color: var(--muted);
  margin-top: 10px;
  font-weight: 300;
}

.hero-sub {
  margin-top: 18px;
  max-width: 620px;
  font-size: clamp(0.92rem, 1.4vw, 1rem);
  color: var(--muted);
  line-height: 1.95;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.5s forwards;
}

.hero-badges {
  margin-top: 18px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  max-width: 760px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.65s forwards;
  justify-content: flex-start;
  align-items: center;
}

.badge {
  border: 1px solid var(--border);
  padding: 5px 12px;
  font-size: 0.6rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  border-radius: 2px;
}

.badge.hi { border-color: var(--accent); color: var(--accent); }

/* ── Section ── */
.section-wrap {
  padding: clamp(60px, 10vw, 100px) clamp(24px, 5vw, 64px);
  max-width: 1000px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.58rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--fd);
  font-size: clamp(36px, 7vw, 76px);
  line-height: 0.9;
  margin-bottom: clamp(36px, 6vw, 56px);
}

.section-title em {
  font-family: var(--fs);
  font-style: italic;
  color: var(--muted);
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 0 auto 48px;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.about-text {
  max-width: 720px;
}

.about-text p {
  font-size: clamp(0.85rem, 1.8vw, 0.95rem);
  color: var(--muted);
  margin-bottom: 18px;
  line-height: 1.95;
}

.about-text p strong { color: var(--text); font-weight: 500; }
.about-text p em { color: var(--accent); font-style: normal; }

.fact-table {
  border: 1px solid var(--border);
  width: 100%;
  max-width: 360px;
  min-width: 260px;
}

.fact-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
}

.fact-row:last-child { border-bottom: none; }

.fact-label {
  font-size: 0.62rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  flex-shrink: 0;
}

.fact-value {
  font-size: 0.75rem;
  color: var(--text);
  text-align: right;
  line-height: 1.4;
  word-break: break-word;
  min-width: 0;
}

.fact-value.ac { color: var(--accent); }

/* ── Project ── */
.project-card {
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  transition: border-color 0.3s;
  max-width: 1100px;
  margin: 0 auto;
}

.project-card:hover { border-color: rgba(200,240,96,0.25); }

.project-header {
  padding: clamp(22px, 4vw, 40px);
  background: var(--surface);
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  gap: 12px;
}

.project-tag {
  font-size: 0.58rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent2);
}

.version-pill {
  font-size: 0.58rem;
  letter-spacing: 2px;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 2px;
  white-space: nowrap;
  flex-shrink: 0;
}

.project-title {
  font-family: var(--fd);
  font-size: clamp(28px, 5vw, 52px);
  letter-spacing: 1px;
  line-height: 1;
  margin-bottom: 10px;
}

.project-sub {
  font-family: var(--fs);
  font-style: italic;
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: var(--muted);
  max-width: 580px;
  line-height: 1.5;
}

.project-body {
  padding: clamp(22px, 4vw, 40px);
  border-top: 1px solid var(--border);
}

.project-body p {
  font-size: clamp(0.84rem, 1.7vw, 0.93rem);
  color: var(--muted);
  line-height: 1.95;
  margin-bottom: 14px;
  max-width: 720px;
}

.project-body p strong { color: var(--text); font-weight: 500; }

.features {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(260px, 1fr));
  gap: 18px;
}

.feat {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: clamp(0.74rem, 1.5vw, 0.8rem);
  color: var(--muted);
  line-height: 1.65;
  transition: border-color 0.2s;
}

.feat:hover { border-color: rgba(200,240,96,0.25); }

.feat strong {
  display: block;
  color: var(--text);
  font-size: 0.58rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 5px;
}

.stack {
  margin-top: 22px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.stack span {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 3px 9px;
  font-size: 0.58rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  border-radius: 2px;
}

/* ── Skills ── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.skill-group {
  background: var(--bg);
  padding: clamp(18px, 3.5vw, 30px);
}

.skill-group-label {
  font-size: 0.58rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.skill-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  min-width: 0;
}

.skill-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: clamp(0.78rem, 1.6vw, 0.86rem);
  color: var(--muted);
  line-height: 1.5;
}

.skill-list li::before {
  content: '';
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 5px;
}

.skill-list li span { color: var(--text); font-weight: 400; }

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}

.contact-left p {
  font-size: clamp(0.84rem, 1.7vw, 0.93rem);
  color: var(--muted);
  line-height: 1.9;
  max-width: 400px;
}

.contact-head {
  font-family: var(--fd);
  font-size: clamp(36px, 6vw, 72px);
  line-height: 0.9;
  margin-bottom: 20px;
}

.contact-head em {
  font-family: var(--fs);
  font-style: italic;
  color: var(--muted);
}

.contact-links {
  border: 1px solid var(--border);
}

.contact-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: var(--muted);
  font-size: clamp(0.65rem, 1.5vw, 0.74rem);
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s, color 0.15s;
}

.contact-link:last-child { border-bottom: none; }
.contact-link:hover { background: var(--surface); color: var(--text); }

.contact-link-label {
  font-size: 0.55rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  flex-shrink: 0;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: clamp(18px, 3vw, 26px) clamp(20px, 5vw, 48px);
  text-align: center;
  font-size: 0.6rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
}

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

/* ── Responsive ── */

@media (min-width: 1200px) {
  nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 18px clamp(24px, 3vw, 72px);
  }

  .hero {
    padding: clamp(90px, 14vh, 140px) clamp(40px, 5vw, 64px) clamp(40px, 7vw, 68px);
  }

  .hero-tag {
    margin-bottom: 18px;
  }

  .hero-sub {
    max-width: 640px;
  }

  .section-wrap {
    padding: clamp(80px, 8vw, 120px) clamp(30px, 5vw, 72px);
  }

  .about-grid {
    gap: clamp(32px, 4vw, 80px);
  }

  .project-top {
    gap: 18px;
  }

  .project-card {
    padding: 0;
  }

  .skills-grid {
    gap: 2px;
  }
}

@media (min-width: 1200px) {
  .hero {
    max-width: 1400px;
    padding: 80px clamp(36px, 4vw, 84px) 56px;
  }

  .hero-name {
    font-size: clamp(42px, 6vw, 92px);
  }

  .hero-sub {
    max-width: 720px;
  }

  .hero-badges {
    max-width: 860px;
    gap: 12px;
  }

  .about-grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 0.95fr);
    gap: clamp(32px, 4vw, 90px);
  }

  .about-text {
    max-width: 760px;
  }

  .fact-table {
    max-width: 380px;
  }
}

@media (max-width: 1100px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .project-top {
    flex-direction: column;
    align-items: stretch;
  }

  .version-pill {
    align-self: flex-start;
  }

  .project-sub,
  .project-body p,
  .contact-left p {
    max-width: 100%;
  }

  .divider {
    margin: 0 auto 36px;
  }
}

@media (max-width: 900px) {
  .features { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .skill-list li { flex-wrap: wrap; }
}

@media (max-width: 700px) {
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (min-width: 1600px) {
  .section-wrap,
  .hero {
    max-width: 1400px;
  }
}