:root {
  --bg: #07101e;
  --bg-soft: #0d1829;
  --panel: rgba(10, 22, 40, 0.85);
  --panel-strong: #0a1422;
  --text: #eef2f8;
  --muted: #a8b8cf;
  --line: rgba(148, 163, 184, 0.18);
  --line-hover: rgba(86, 212, 255, 0.35);
  --accent: #56d4ff;
  --accent-soft: rgba(86, 212, 255, 0.12);
  --accent-strong: #7df6c4;
  --shadow: 0 24px 80px rgba(2, 8, 20, 0.55);
  --shadow-hover: 0 32px 80px rgba(2, 8, 20, 0.7), 0 0 0 1px rgba(86, 212, 255, 0.1);
  --radius: 20px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Space Grotesk", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  font-feature-settings: "palt";
  background:
    radial-gradient(ellipse at top left, rgba(86, 212, 255, 0.12), transparent 35%),
    radial-gradient(ellipse at 85% 15%, rgba(125, 246, 196, 0.07), transparent 25%),
    linear-gradient(180deg, #050c18 0%, #07101e 40%, #090f1c 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(86, 212, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(86, 212, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.1) 100%);
  pointer-events: none;
}

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

main {
  animation: fadeUp 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ── Cursor blink ────────────────────────────── */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.terminal-cursor {
  display: inline-block;
  width: 7px;
  height: 0.9em;
  background: var(--accent-strong);
  margin-left: 3px;
  vertical-align: text-bottom;
  border-radius: 1px;
  animation: blink 1.1s step-end infinite;
}

/* ── Layout ──────────────────────────────────── */
.page-shell {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 80px;
}

/* ── Header ──────────────────────────────────── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px 0 28px;
}

.brand,
.site-nav a,
.mail-link,
.social-card {
  color: inherit;
  text-decoration: none;
}

.brand,
.eyebrow,
.section-label,
.project-meta,
.status-label,
.social-handle {
  font-family: "IBM Plex Mono", monospace;
}

.brand {
  font-size: 0.95rem;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 20, 38, 0.75);
  letter-spacing: 0.02em;
  transition: border-color 180ms ease, background 180ms ease;
}

.brand:hover {
  border-color: var(--line-hover);
  background: rgba(14, 28, 52, 0.9);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.site-nav a:hover {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.site-nav a.active {
  color: var(--accent);
  border-color: rgba(86, 212, 255, 0.25);
  background: rgba(86, 212, 255, 0.06);
}

/* ── Hero (landing) ──────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: stretch;
  padding: 40px 0 32px;
}

.hero-copy,
.hero-panel,
.panel,
.project-card,
.social-card,
.contact-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-copy {
  padding: 38px 36px;
}

.eyebrow {
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.76rem;
  margin: 0;
}

.section-label,
.project-meta,
.status-label,
.social-handle {
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.76rem;
}

.hero-copy h1 {
  margin: 18px 0 0;
  font-size: clamp(3.2rem, 7.5vw, 6.2rem);
  line-height: 1.08;
  max-width: 10ch;
}

.hero-copy h1 span {
  color: var(--accent-strong);
}

.hero-text,
.about-main p,
.project-card p,
.contact-text {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
}

.hero-text {
  max-width: 36rem;
  margin: 22px 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ── Buttons ─────────────────────────────────── */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button-primary {
  color: #031018;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-color: transparent;
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(86, 212, 255, 0.35);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(148, 163, 184, 0.36);
}

/* ── Terminal card ───────────────────────────── */
.hero-panel {
  padding: 20px;
  display: grid;
  gap: 16px;
}

.terminal-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: var(--panel-strong);
}

.terminal-bar {
  display: flex;
  gap: 7px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
}

.terminal-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(244, 247, 251, 0.18);
}

.terminal-body {
  padding: 16px 16px 20px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.9;
}

.terminal-body p {
  margin: 0;
}

.prompt {
  color: var(--accent-strong);
  margin-right: 8px;
}

.key {
  color: var(--accent);
  display: inline-block;
  min-width: 5.8rem;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.status-card {
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}

.status-card strong {
  display: block;
  margin-top: 10px;
  font-size: 1.05rem;
}

/* ── Page hero (inner pages) ─────────────────── */
.page-hero {
  padding: 40px 0 36px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 48px;
}

.page-hero .eyebrow {
  margin-bottom: 14px;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.1;
}

.page-hero p {
  color: var(--muted);
  margin: 16px 0 0;
  font-size: 1rem;
  line-height: 1.8;
  max-width: 48rem;
}

/* ── Sections ────────────────────────────────── */
.section {
  padding-top: 40px;
}

.section-heading {
  display: grid;
  gap: 10px;
  margin-bottom: 32px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.1;
}

/* ── About ───────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 20px;
}

.panel {
  padding: 28px 30px;
}

.about-main p + p {
  margin-top: 16px;
}

.capability-list,
.tag-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.capability-list {
  margin-top: 14px;
}

.capability-list li {
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.capability-list li::before {
  content: "→";
  color: var(--accent);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.capability-list li:first-child {
  padding-top: 4px;
}

.capability-list li:last-child {
  border-bottom: none;
}

/* ── Tech stack grid ─────────────────────────── */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.stack-item {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.025);
  text-align: center;
}

.stack-item .stack-name {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.stack-item .stack-level {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Projects ────────────────────────────────── */
.project-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 20px;
}

.project-card {
  padding: 26px;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: rgba(86, 212, 255, 0.28);
  box-shadow: var(--shadow-hover);
}

.project-card.featured {
  background:
    linear-gradient(150deg, rgba(86, 212, 255, 0.1), transparent 40%),
    var(--panel);
}

.project-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.project-card h3 {
  margin: 16px 0 10px;
  font-size: 1.7rem;
  line-height: 1.2;
}

.project-card p {
  flex: 1;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.tag-list li {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  background: var(--accent-soft);
}

/* ── Social ──────────────────────────────────── */
.social-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.social-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.social-card:hover {
  transform: translateY(-5px);
  border-color: var(--line-hover);
  background: rgba(14, 30, 56, 0.95);
  box-shadow: 0 16px 40px rgba(2, 8, 20, 0.5);
}

.social-name {
  font-size: 1.25rem;
  font-weight: 700;
}

.social-desc {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-top: 4px;
}

/* ── Contact ─────────────────────────────────── */
.contact-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  padding: 36px 40px;
}

.contact-panel h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  line-height: 1.2;
}

.mail-link {
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(1rem, 2vw, 1.4rem);
  color: var(--accent-strong);
  text-decoration: none;
  white-space: nowrap;
  transition: color 160ms ease;
}

.mail-link:hover {
  color: var(--accent);
}

/* ── Footer ──────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 80px;
  padding: 28px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 160ms ease;
}

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

/* ── CTA strip ───────────────────────────────── */
.cta-strip {
  margin-top: 48px;
  padding: 32px 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(18px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta-strip p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.cta-strip strong {
  display: block;
  font-size: 1.15rem;
  color: var(--text);
  margin-bottom: 4px;
}

/* ── Responsive ──────────────────────────────── */
@media (max-width: 980px) {
  .hero,
  .about-grid,
  .project-grid,
  .social-grid,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: none;
  }

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

  .stack-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 1160px);
  }

  .site-header {
    flex-direction: column;
    align-items: start;
    gap: 12px;
  }

  .site-nav {
    gap: 4px;
  }

  .hero-copy,
  .hero-panel,
  .panel,
  .project-card,
  .social-card,
  .contact-panel {
    padding: 22px;
    border-radius: 18px;
  }

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

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

  .cta-strip {
    flex-direction: column;
    align-items: start;
    padding: 24px;
  }

  .contact-panel {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
    align-items: start;
  }
}