:root {
  --bg: #0d1117;
  --bg-elevated: #12181f;
  --bg-card: #161b22;
  --border: #30363d;
  --border-soft: #21262d;
  --text: #c9d1d9;
  --text-muted: #8b949e;
  --text-dim: #6e7681;

  --blue: #58a6ff;
  --blue-dim: rgba(88, 166, 255, 0.12);
  --green: #3fb950;
  --green-dim: rgba(63, 185, 80, 0.12);
  --orange: #d29922;
  --orange-dim: rgba(210, 153, 34, 0.14);

  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Noto Sans JP', sans-serif;

  --sidebar-w: 248px;
  --radius: 6px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--blue-dim); color: var(--blue); }

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

/* ---------- MOBILE HEADER ---------- */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 40;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-soft);
}

.mobile-name {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
  letter-spacing: 0.02em;
}

.hamburger {
  width: 32px;
  height: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}

.hamburger span {
  width: 15px;
  height: 1.5px;
  background: var(--text-muted);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 45;
}
.overlay.visible { display: block; }

/* ---------- LAYOUT ---------- */
.layout {
  display: flex;
  align-items: flex-start;
  max-width: 1180px;
  margin: 0 auto;
}

/* ---------- SIDEBAR ---------- */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 40px 22px 28px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-soft);
  overflow-y: auto;
}

.sidebar-profile {
  padding-bottom: 22px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-soft);
}

.sidebar-avatar {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--blue-dim), var(--green-dim));
  border: 1px solid var(--border);
  color: var(--blue);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.sidebar-name {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

.sidebar-role {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 3px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: 1;
}

.nav-label {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin: 16px 0 8px;
  padding: 0 10px;
}
.nav-label:first-child { margin-top: 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 10px;
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text-muted);
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-item:hover {
  background: var(--bg-card);
  color: var(--text);
}

.nav-item.active {
  color: var(--blue);
  background: var(--blue-dim);
}

.nav-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.55;
  flex-shrink: 0;
}
.nav-item.active .nav-dot { opacity: 1; }

.sidebar-links {
  padding-top: 18px;
  margin-top: 18px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.sidebar-link-row {
  display: flex;
  align-items: center;
  gap: 7px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

a.sidebar-link:hover { color: var(--blue); }

.lock-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--text-dim);
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.lock-icon:hover {
  color: var(--orange);
  border-color: rgba(210, 153, 34, 0.35);
}

/* ---------- MAIN ---------- */
.main {
  flex: 1;
  min-width: 0;
  padding: 56px 48px 80px;
}

/* ---------- HERO ---------- */
.hero { margin-bottom: 64px; }

.hero-prompt {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.cursor {
  display: inline-block;
  width: 7px;
  height: 13px;
  margin-left: 3px;
  background: var(--green);
  vertical-align: -2px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-name {
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(30px, 4vw, 42px);
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 18px;
}
.hero-name span { color: var(--blue); }

.hero-yomi {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-top: -12px;
  margin-bottom: 18px;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.9;
  max-width: 640px;
  margin: 0 0 24px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 5px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.tag.blue { color: var(--blue); background: var(--blue-dim); border-color: rgba(88,166,255,0.25); }
.tag.green { color: var(--green); background: var(--green-dim); border-color: rgba(63,185,80,0.25); }
.tag.orange { color: var(--orange); background: var(--orange-dim); border-color: rgba(210,153,34,0.3); }

/* ---------- SECTIONS ---------- */
.section {
  margin-bottom: 60px;
  scroll-margin-top: 24px;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 22px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-soft);
}

.section-icon {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
}

.section-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

/* ---------- PROJECT CARDS ---------- */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 22px 24px;
  margin-bottom: 16px;
  transition: border-color 0.15s ease;
}
.project-card:hover { border-color: var(--border); }

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.project-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--blue);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.project-title {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.project-period {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-dim);
}

.project-badge {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  white-space: nowrap;
}
.project-badge.award {
  color: var(--orange);
  background: var(--orange-dim);
  border-color: rgba(210,153,34,0.3);
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 5px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.project-link:hover {
  color: var(--blue);
  border-color: rgba(88, 166, 255, 0.35);
  background: var(--blue-dim);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.tech-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  color: var(--text-muted);
}

.project-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.85;
  margin: 0 0 14px;
}

.project-result {
  font-size: 13px;
  color: var(--text);
  background: var(--bg-elevated);
  border-left: 2px solid var(--green);
  padding: 10px 14px;
  border-radius: 0 4px 4px 0;
}
.project-result strong {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--green);
  margin-bottom: 4px;
  letter-spacing: 0.03em;
}

/* ---------- SKILLS ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 18px 20px;
}

.skill-group-title {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--text);
  padding: 5px 0;
}

.skill-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
}

/* ---------- STRENGTHS ---------- */
.strengths-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.strength-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 22px;
}

.strength-icon {
  font-size: 20px;
  display: inline-block;
  margin-bottom: 10px;
}

.strength-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.strength-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ---------- EXPERIENCE ---------- */
.work-item {
  display: flex;
  gap: 22px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-soft);
}
.work-item:last-child { border-bottom: none; }

.work-period {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-dim);
  width: 132px;
  flex-shrink: 0;
  padding-top: 2px;
}

.work-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.work-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ---------- GITHUB ACTIVITY ---------- */
.contrib-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 20px 22px;
}

.contrib-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 12px;
}

.contrib-total {
  color: var(--text-muted);
}

.contrib-link {
  color: var(--blue);
  transition: opacity 0.15s ease;
}
.contrib-link:hover { opacity: 0.8; }

.contrib-graph-wrap {
  overflow-x: auto;
  padding-bottom: 4px;
}

.contrib-graph {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 1fr);
  gap: 3px;
  width: max-content;
}

.contrib-graph i {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  font-style: normal;
}

.contrib-graph i[data-level="1"] { background: rgba(63, 185, 80, 0.25); border-color: transparent; }
.contrib-graph i[data-level="2"] { background: rgba(63, 185, 80, 0.45); border-color: transparent; }
.contrib-graph i[data-level="3"] { background: rgba(63, 185, 80, 0.7); border-color: transparent; }
.contrib-graph i[data-level="4"] { background: var(--green); border-color: transparent; }

.contrib-legend {
  display: flex;
  align-items: center;
  gap: 4px;
  justify-content: flex-end;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-dim);
}

.contrib-legend i {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
}
.contrib-legend i[data-level="1"] { background: rgba(63, 185, 80, 0.25); border-color: transparent; }
.contrib-legend i[data-level="2"] { background: rgba(63, 185, 80, 0.45); border-color: transparent; }
.contrib-legend i[data-level="3"] { background: rgba(63, 185, 80, 0.7); border-color: transparent; }
.contrib-legend i[data-level="4"] { background: var(--green); border-color: transparent; }

/* ---------- FOOTER ---------- */
.footer-bar {
  display: flex;
  justify-content: space-between;
  padding-top: 26px;
  margin-top: 24px;
  border-top: 1px solid var(--border-soft);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .mobile-header { display: flex; }

  .layout { display: block; }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 50;
    background: var(--bg);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }
  .sidebar.open { transform: translateX(0); }

  .main { padding: 32px 20px 64px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
  .sidebar, .hamburger span { transition: none; }
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ---------- LIFELINE PAGE ---------- */
.life-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.life-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 32px;
  transition: color 0.15s ease;
}
.life-back:hover { color: var(--blue); }

.life-title {
  font-family: var(--mono);
  font-size: 1.4rem;
  color: var(--text);
  margin-bottom: 6px;
}
.life-title span { color: var(--text-dim); font-size: 0.95rem; margin-left: 10px; }

.life-lead {
  color: var(--text-muted);
  font-size: 13.5px;
  margin-bottom: 32px;
}

.life-lock-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 28px;
}

.life-lock-icon {
  color: var(--text-dim);
  margin-bottom: 14px;
}

.life-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.life-input {
  flex: 1;
  min-width: 180px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13.5px;
  padding: 10px 12px;
}
.life-input:focus { outline: none; border-color: var(--blue); }

.life-submit {
  background: var(--blue-dim);
  border: 1px solid rgba(88, 166, 255, 0.35);
  border-radius: var(--radius);
  color: var(--blue);
  font-family: var(--mono);
  font-size: 13px;
  padding: 10px 18px;
  cursor: pointer;
  transition: background 0.15s ease;
}
.life-submit:hover { background: rgba(88, 166, 255, 0.2); }
.life-submit:disabled { opacity: 0.5; cursor: default; }

.life-error {
  color: #f85149;
  font-size: 12.5px;
  margin-top: 12px;
  font-family: var(--mono);
}

.life-chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 24px;
  overflow-x: auto;
}

.life-svg-wrap { min-width: 640px; }

.life-band-label {
  font-family: var(--mono);
  font-size: 10px;
  fill: var(--text-dim);
}

.life-axis-label {
  font-family: var(--mono);
  font-size: 9.5px;
  fill: var(--text-dim);
}

.life-point { fill: var(--blue); }
.life-point:hover { fill: var(--orange); }

.life-line {
  fill: none;
  stroke: var(--blue);
  stroke-width: 2;
}

.life-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
}

.life-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.life-legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.life-events {
  margin-top: 28px;
}

.life-event {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 13px;
}
.life-event:last-child { border-bottom: none; }

.life-event-age {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-dim);
  width: 60px;
  flex-shrink: 0;
}

.life-event-memo { color: var(--text); }