/* ==========================================================================
   Tokens
   ========================================================================== */
:root {
  --bg: #ffffff;
  --surface: #eef8f8;
  --line: rgba(18, 54, 64, 0.12);
  --line-strong: rgba(18, 54, 64, 0.22);
  --ink: #123640;
  --ink-soft: #4f6e77;
  --blue: #0a7f94;
  --green: #7cb93f;
  --wood: #a8672e;

  --font-display: "Space Grotesk", sans-serif;
  --font-jp: "Zen Kaku Gothic New", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --measure: 42rem;
  --page-pad: clamp(1.5rem, 5vw, 5rem);
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-jp);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.mono { font-family: var(--font-mono); letter-spacing: 0.02em; }

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 90%);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--surface);
  color: var(--ink);
  padding: 0.75rem 1.25rem;
  z-index: 100;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

/* ==========================================================================
   Chips
   ========================================================================== */
.chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-soft);
  background: rgba(10, 127, 148, 0.05);
  transition: border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}
.stack__chips .chip:hover,
.stack__chips .chip:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
  box-shadow: 0 0 0 1px rgba(10, 127, 148, 0.25);
}

/* ==========================================================================
   Hero (+ footer variant)
   ========================================================================== */
.hero {
  position: relative;
  padding: clamp(5rem, 14vh, 8rem) var(--page-pad) clamp(3.5rem, 10vh, 6rem);
  overflow: hidden;
  z-index: 1;
}

.hero__chart {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.5;
}
.hero__chart-line {
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  animation: draw-chart 1.8s 0.3s cubic-bezier(0.65, 0, 0.35, 1) forwards;
}
.hero__chart-dot {
  opacity: 0;
  animation: fade-in 0.4s 2s ease forwards;
}
@keyframes draw-chart {
  to { stroke-dashoffset: 0; }
}
@keyframes fade-in {
  to { opacity: 1; }
}

.hero__inner {
  position: relative;
  max-width: 46rem;
  margin: 0 auto;
}

.hero__identity {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.hero__portrait { flex: none; width: clamp(4rem, 7vw, 5.5rem); }

.hero__portrait-frame {
  padding: 2px;
  border-radius: 0.75rem;
  background: linear-gradient(165deg, var(--blue), var(--green));
}

.hero__portrait img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 0.6rem;
  box-shadow: 0 10px 22px -14px rgba(18, 54, 64, 0.3);
}

.hero__meta {
  font-size: 0.8rem;
  color: var(--blue);
  margin-bottom: clamp(1.75rem, 6vh, 3.5rem);
  letter-spacing: 0.12em;
}

.hero__role {
  font-weight: 700;
  font-size: clamp(1.3rem, 3.2vw, 1.75rem);
  color: var(--blue);
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

.hero__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.hero__lead {
  margin-top: 1.5rem;
  max-width: var(--measure);
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  color: var(--ink-soft);
}

.hero__rule {
  height: 1px;
  background: var(--line-strong);
  margin: 3rem 0 2.5rem;
}

/* Footer variant */
.hero--footer { padding-bottom: clamp(2.5rem, 8vh, 4rem); }
.hero--footer .section__eyebrow { color: var(--blue); }
.hero__title {
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  margin-top: 0.5rem;
}

.linklist__label {
  margin-top: 2.75rem;
  font-size: 0.75rem;
  color: var(--ink-soft);
  letter-spacing: 0.12em;
}

.linklist {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}
.linklist li { border-bottom: 1px solid var(--line); }
.linklist a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0.1rem;
  font-size: 1.05rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.linklist a:hover,
.linklist a:focus-visible {
  color: var(--blue);
  padding-left: 0.5rem;
}
.linklist__arrow { color: var(--blue); font-size: 0.9rem; }

.formstub {
  margin-top: 2.5rem;
  border: 1px dashed var(--line-strong);
  border-radius: 4px;
  padding: 1.75rem 1.5rem;
  text-align: center;
  background: rgba(10, 127, 148, 0.04);
}
.formstub__text { font-size: 0.85rem; color: var(--blue); }
.formstub__sub { margin-top: 0.5rem; font-size: 0.85rem; color: var(--ink-soft); }

.hero__copyright {
  font-size: 0.75rem;
  color: var(--ink-soft);
  opacity: 0.7;
}

/* ==========================================================================
   Sections (About / Skills / Strengths)
   ========================================================================== */
.section {
  position: relative;
  padding: clamp(4rem, 12vh, 7rem) var(--page-pad);
  z-index: 1;
}
.section--surface { background: var(--surface); }

.section__inner { max-width: 46rem; margin: 0 auto; }

.section__eyebrow {
  font-size: 0.8rem;
  color: var(--blue);
  letter-spacing: 0.12em;
}

.section__title {
  font-family: var(--font-jp);
  font-weight: 900;
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  margin-top: 0.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--line-strong);
}

.section__lead {
  margin-top: 2rem;
  max-width: var(--measure);
  color: var(--ink-soft);
  font-size: 1.02rem;
}

/* Career log (changelog-style timeline) */
.log {
  margin-top: 2.75rem;
  position: relative;
  padding-left: 1.75rem;
  border-left: 1px solid var(--line-strong);
}
.log__row {
  position: relative;
  padding-bottom: 2.25rem;
}
.log__row:last-child { padding-bottom: 0; }
.log__row::before {
  content: "";
  position: absolute;
  left: -1.99rem;
  top: 0.4rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 3px var(--bg);
}
.log__index { color: var(--blue); font-size: 0.85rem; }
.log__label { font-weight: 700; margin-top: 0.4rem; font-size: 1.05rem; }
.log__detail { margin-top: 0.3rem; color: var(--ink-soft); font-size: 0.95rem; }

/* Skills stack */
.stack {
  margin-top: 2.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}
.stack__cat { color: var(--blue); font-size: 0.85rem; margin-bottom: 0.85rem; }
.stack__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* Strength cards */
.cards {
  margin-top: 2.75rem;
  display: grid;
  gap: 1.25rem;
}
@media (min-width: 46rem) {
  .cards { grid-template-columns: repeat(3, 1fr); }
}

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2.5rem 1.5rem 2rem;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.card:hover { border-color: var(--line-strong); transform: translateY(-2px); }

.card__num { color: var(--blue); font-size: 0.85rem; }
.card__title {
  font-family: var(--font-jp);
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 0.75rem;
}
.card__text {
  margin-top: 0.85rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.card--verified { overflow: visible; }

/* ==========================================================================
   Signature element: verification badge
   ========================================================================== */
.badge {
  position: absolute;
  top: -1.4rem;
  right: -0.6rem;
  width: 4.6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.badge__ring { overflow: visible; }
.badge__ring-track { stroke: var(--line-strong); }
.badge__ring-progress {
  stroke: var(--wood);
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: 32px 32px;
  stroke-dasharray: 170;
  stroke-dashoffset: 170;
  transition: stroke-dashoffset 1s cubic-bezier(0.4, 0, 0.2, 1);
}
.badge__check {
  stroke: var(--wood);
  stroke-dasharray: 34;
  stroke-dashoffset: 34;
  transition: stroke-dashoffset 0.5s ease 0.7s;
}
.badge__label {
  font-size: 0.68rem;
  font-weight: 600;
  color: #fff;
  background: var(--wood);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.4s ease 1s, transform 0.4s ease 1s;
}

.badge.is-verified .badge__ring-progress { stroke-dashoffset: 0; }
.badge.is-verified .badge__check { stroke-dashoffset: 0; }
.badge.is-verified .badge__label { opacity: 1; transform: translateY(0); }

@media (max-width: 30rem) {
  .badge { top: -0.9rem; right: 1rem; width: 4rem; }
}

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero__chart-line { animation: none; stroke-dashoffset: 0; }
  .hero__chart-dot { animation: none; opacity: 1; }
  .badge__ring-progress,
  .badge__check,
  .badge__label {
    transition: none;
  }
  .badge.is-verified .badge__ring-progress { stroke-dashoffset: 0; }
  .badge.is-verified .badge__check { stroke-dashoffset: 0; }
  .badge.is-verified .badge__label { opacity: 1; transform: none; }
  .card:hover { transform: none; }
}