:root {
  --bg: #101827;
  --bg-2: #182235;
  --surface: rgba(24, 35, 56, 0.88);
  --surface-2: rgba(30, 41, 59, 0.84);
  --card: rgba(39, 52, 78, 0.84);
  --text: #f1f5f9;
  --muted: #cbd5e1;
  --soft: #e2e8f0;
  --line: rgba(203, 213, 225, 0.24);
  --accent: #38bdf8;
  --accent-2: #a78bfa;
  --accent-3: #22c55e;
  --shadow: rgba(0, 0, 0, 0.34);
  --radius: 24px;
  --max: 1160px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 10% 10%, rgba(56, 189, 248, 0.22), transparent 30%),
    radial-gradient(circle at 90% 12%, rgba(167, 139, 250, 0.20), transparent 32%),
    radial-gradient(circle at 60% 100%, rgba(34, 197, 94, 0.12), transparent 38%),
    linear-gradient(135deg, #101827, #182235);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

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

.container {
  width: min(var(--max), 92%);
  margin: 0 auto;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 0;
}

/* NAVBAR */

nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(16, 24, 39, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #020617;
  font-weight: 950;
  box-shadow: 0 12px 35px rgba(56, 189, 248, 0.24);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav-links a {
  transition: color 0.18s ease;
}

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

.mobile-note {
  display: none;
  color: var(--muted);
  font-size: 0.88rem;
}

/* HERO */

header {
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 74px);
  display: flex;
  align-items: center;
  padding: 84px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(340px, 0.82fr);
  gap: 44px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.38);
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 22px;
}

.pulse {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.12);
}

h1 {
  font-size: clamp(3rem, 8vw, 6.8rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
  margin-bottom: 16px;
}

.gradient-text {
  background: linear-gradient(90deg, #38bdf8, #a78bfa, #22c55e);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-statement {
  font-size: clamp(1.45rem, 2.6vw, 2.25rem);
  line-height: 1.15;
  font-weight: 850;
  color: #ffffff;
  max-width: 850px;
  margin-bottom: 18px;
  letter-spacing: -0.035em;
}

.lead {
  font-size: clamp(1.05rem, 1.5vw, 1.23rem);
  color: var(--soft);
  max-width: 760px;
  margin-bottom: 30px;
}

.lead strong {
  color: #ffffff;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 18px;
  border-radius: 14px;
  font-weight: 850;
  border: 1px solid transparent;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #020617;
  box-shadow: 0 18px 42px rgba(56, 189, 248, 0.22);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.055);
  border-color: var(--line);
  color: var(--text);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-secondary:hover {
  border-color: rgba(56, 189, 248, 0.65);
  color: var(--accent);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  color: var(--soft);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
  border-radius: 999px;
  padding: 7px 11px;
  font-size: 0.88rem;
}

/* TERMINAL CARD */

.terminal-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.94), rgba(15, 23, 42, 0.94));
  border-radius: 28px;
  box-shadow: 0 28px 80px var(--shadow);
  overflow: hidden;
  transform: rotate(1deg);
}

.terminal-top {
  height: 46px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
}

.dot.red {
  background: #fb7185;
}

.dot.yellow {
  background: #facc15;
}

.dot.green {
  background: #4ade80;
}

.terminal-body {
  padding: 24px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92rem;
  color: #dbeafe;
}

.terminal-line {
  margin-bottom: 12px;
}

.prompt {
  color: var(--accent-3);
}

.cmd {
  color: #e0e7ff;
}

.comment {
  color: #cbd5e1;
}

.value {
  color: #fef3c7;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.stat {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.055);
  border-radius: 18px;
  padding: 14px;
}

.stat strong {
  display: block;
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.stat span {
  color: var(--muted);
  font-size: 0.84rem;
}

/* SECTIONS */

section {
  position: relative;
  z-index: 1;
  padding: 88px 0;
}

.section-head {
  max-width: 850px;
  margin-bottom: 36px;
}

.kicker {
  display: inline-block;
  color: var(--accent);
  font-weight: 900;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  text-transform: uppercase;
  margin-bottom: 10px;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--muted);
  font-size: 1.04rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.16);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(56, 189, 248, 0.55);
  background: rgba(45, 59, 87, 0.92);
}

.card h3 {
  font-size: 1.18rem;
  margin-bottom: 10px;
}

.card p {
  color: var(--muted);
}

.icon {
  width: 46px;
  height: 46px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.28);
  margin-bottom: 16px;
  font-size: 1.25rem;
}

/* TIMELINE */

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 20px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 22px;
  padding: 22px;
}

.time {
  color: var(--accent);
  font-weight: 900;
  font-size: 0.94rem;
}

.timeline-item h3 {
  margin-bottom: 4px;
}

.meta {
  color: var(--soft);
  margin-bottom: 8px;
  font-weight: 700;
}

.timeline-item p,
.timeline-item li {
  color: var(--muted);
}

ul.clean {
  list-style: none;
  display: grid;
  gap: 7px;
  margin-top: 10px;
}

ul.clean li::before {
  content: "▹";
  color: var(--accent);
  margin-right: 8px;
}

/* SKILLS */

.skill-blocks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 14px;
}

.skill {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.055);
  color: var(--soft);
  padding: 8px 11px;
  border-radius: 999px;
  font-size: 0.9rem;
}

/* CERTIFICATIONS */

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.cert {
  position: relative;
  overflow: hidden;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 22px;
  padding: 32px;
  text-align: center;
}

.cert::after {
  content: "";
  position: absolute;
  inset: auto -50px -60px auto;
  width: 155px;
  height: 155px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.10);
}

.cert-logo {
  position: relative;
  z-index: 1;
  min-height: 110px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-logo img {
  max-width: 260px;
  max-height: 105px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 16px 30px rgba(0, 0, 0, 0.30));
}

.cert-logo img[src*="nvidia-dli"] {
  max-width: 345px;
  max-height: 140px;
}

.cert h3 {
  position: relative;
  z-index: 1;
  font-size: 1.08rem;
  max-width: 310px;
  margin: 0;
}

.flag-jp {
  width: 76px;
  height: 52px;
  border-radius: 12px;
  background: radial-gradient(circle at center, #bc002d 0 30%, #ffffff 31%);
  border: 1px solid rgba(255, 255, 255, 0.42);
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.28);
}

/* PROJECTS */

.project-card {
  min-height: 265px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.project-top p {
  margin-top: 8px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.mini-tag {
  color: var(--accent);
  background: rgba(56, 189, 248, 0.10);
  border: 1px solid rgba(56, 189, 248, 0.26);
  border-radius: 999px;
  padding: 6px 9px;
  font-size: 0.78rem;
  font-weight: 800;
}

/* LANGUAGES */

.language-row {
  display: grid;
  gap: 12px;
}

.language {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.055);
  padding: 14px;
}

.language strong {
  display: block;
}

.language span {
  color: var(--muted);
  font-size: 0.9rem;
}

.level {
  color: var(--accent);
  font-weight: 950;
  white-space: nowrap;
}

/* CONTACT */

.contact-panel {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
  align-items: stretch;
}

.contact-cta {
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(167, 139, 250, 0.14), rgba(34, 197, 94, 0.09));
  border-radius: 28px;
  padding: 30px;
}

.contact-cta p {
  color: var(--soft);
  max-width: 720px;
  margin-bottom: 24px;
}

/* FOOTER */

footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  padding: 30px 0;
  color: var(--muted);
  text-align: center;
}

/* RESPONSIVE */

@media (max-width: 980px) {
  .hero,
  .grid-3,
  .grid-2,
  .skill-blocks,
  .cert-grid,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .terminal-card {
    transform: none;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .cert-logo img {
    max-width: 240px;
    max-height: 100px;
  }

  .cert-logo img[src*="nvidia-dli"] {
    max-width: 300px;
    max-height: 125px;
  }
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
  }

  .mobile-note {
    display: block;
  }

  header {
    padding: 56px 0;
  }

  section {
    padding: 64px 0;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .cert {
    min-height: 220px;
  }

  .cert-logo img {
    max-width: 220px;
    max-height: 90px;
  }

  .cert-logo img[src*="nvidia-dli"] {
    max-width: 270px;
    max-height: 115px;
  }

  h1 {
    letter-spacing: -0.045em;
  }

  .hero-statement {
    font-size: 1.35rem;
  }
}