/* ============================================================
   Components + layout styles — Tad Natsuhara portfolio
   RULE: reference var() from tokens.css only. No raw hex / px
   that already exist as a token. tokens.css is the source of truth.
   ============================================================ */

/* ---------- Layout primitive: Section ----------
   Vertical rhythm + 1px separators between sections (build-spec §1).
   .container itself is defined in tokens.css — do not redefine it. */
.section {
  padding-top: var(--section-pad);
  padding-bottom: var(--section-pad);
  border-bottom: 1px solid var(--border);
}
.section--flush  { border-bottom: none; }
.section--footer { background: var(--bg-footer); border-bottom: none; }

/* ---------- Layout primitive: sticky-label split ----------
   The reused two-column pattern: sticky cyan eyebrow left, content right
   (build-spec §3 — What I Do, How I Work, About). Column ratio is set
   per use via the --split-cols custom property so one rule serves all. */
.split {
  display: grid;
  grid-template-columns: 0.42fr 1fr; /* default; modifiers below override per section */
  gap: var(--gap-split);
  align-items: start;
}
/* Per-section column ratios (build-spec §3b/3d/3f) — kept here, never inline */
.split--what    { grid-template-columns: 0.42fr 1fr; }
.split--approach{ grid-template-columns: 0.42fr 1fr; }
.split--about   { grid-template-columns: 0.82fr 1.18fr; }
.split__label {
  position: sticky;
  top: var(--header-offset);
}

/* ---------- Text primitives: Eyebrow / Pill / Chip ---------- */
.eyebrow {
  display: inline-block;
  margin: 0;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--accent-text);
}

.pill {
  display: inline-block;
  background: var(--accent);
  color: var(--band-text);
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  padding: 7px 14px;
  border-radius: var(--r-pill);
}

.chip {
  display: inline-block;
  background: var(--bg-inset);
  color: var(--text-tertiary);
  font-size: var(--fs-chip);
  font-weight: 500;
  padding: 7px 13px;
  border-radius: var(--r-pill);
}

/* ---------- SiteHeader (build-spec §2) ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--scrim);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}
.site-header__name {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
}
.site-header__logo {
  display: block;
  height: 32px;
  width: auto; /* 201x45 intrinsic keeps the aspect */
}
.site-header__nav { display: flex; gap: 28px; }
.site-header__link {
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--hover-color-dur);
  padding-block: 15px;   /* 44px tap box */
  margin-block: -15px;
}
.site-header__link:hover { color: var(--text-primary); }

/* ---------- Mobile nav toggle (hidden on desktop) ---------- */
.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin: -10px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}
.site-header__toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--hover-color-dur), opacity var(--hover-color-dur);
}
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:first-child { transform: translateY(3.5px) rotate(45deg); }
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* ---------- Hero (build-spec §3a) ---------- */
.hero__badge {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.hero__meta { font-size: 0.8125rem; font-weight: 600; color: var(--text-muted); }

.hero__headline {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-display);
  line-height: var(--lh-display);
  letter-spacing: var(--ls-serif);
  font-weight: 800;
}
.hero__line { display: block; text-wrap: balance; }
.hero__line--accent { color: var(--accent-text); }

.hero__subtext {
  margin-top: 56px;
}
.hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-lead);
  line-height: var(--lh-body);
  color: var(--text-secondary);
}

/* ---------- Statement block (What I Do; reused by How I Work) ---------- */
.statement {
  margin: 0 0 28px;
  font-family: var(--font-display);
  font-size: var(--fs-statement-sm);
  line-height: var(--lh-statement);
  letter-spacing: var(--ls-serif);
  font-weight: 600;
  color: var(--text-primary);
}
.statement__body {
  margin: 0 0 28px;
  font-size: var(--fs-lead);
  line-height: var(--lh-body);
  color: var(--text-muted);
  max-width: 60ch;
}
/* ---------- Section opener (2px rule + label/meta row, build-spec §3c) ---------- */
.section-opener {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 22px;
  border-top: 2px solid var(--rule-strong);
  margin-bottom: var(--gap-split);
}
.section-opener__label {
  margin: 0;
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-primary);
}
.section-opener__meta {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ---------- CaseStudyCard (build-spec §3c) ---------- */
.case-stack { display: flex; flex-direction: column; gap: var(--gap-stack); }

.case-card {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-feature);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-ambient-rest);
  transition: border-color var(--hover-dur), box-shadow var(--hover-dur);
}
.case-card:hover { border-color: var(--border-bright); box-shadow: var(--shadow-ambient-hover); }

.case-card__body { padding: 48px 50px; }

.case-card__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 22px;
}
.case-card__num { color: var(--accent-text); font-weight: 700; }
.case-card__client { color: var(--text-bright); }
.case-card__dot { color: var(--text-faint); }

.case-card__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: var(--fs-section-sm);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-serif);
  font-weight: 700;
  color: var(--text-primary);
}
.case-card__question {
  margin: 0 0 18px;
  font-size: var(--fs-lead);
  font-style: italic;
  font-weight: 600;
  line-height: var(--lh-body);
  color: var(--text-secondary);
}
.case-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-chip);
  font-weight: 700;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--hover-color-dur);
}
.case-card__arrow { transition: transform var(--hover-color-dur); }
.case-card:hover .case-card__cta { color: var(--text-primary); }
.case-card:hover .case-card__arrow { transform: translateX(4px); }

.case-card__media { background: var(--bg-inset); min-height: 420px; }

/* ---------- ImageSlot placeholder ---------- */
.image-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 100%;
  min-height: 420px;
  padding: 24px;
  text-align: center;
  background: var(--bg-inset);
}
.image-slot__icon { font-size: 1.625rem; color: var(--text-faint); }
.image-slot__caption { font-size: var(--fs-chip); font-weight: 600; color: var(--text-muted); }
.image-slot__hint {
  font-size: 0.6875rem;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
}
.image-slot__img { display: block; width: 100%; height: 100%; object-fit: cover; }

/* ---------- Statement closing line (How I Work) ---------- */
.statement__closing {
  margin: 44px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-coda);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-statement);
  font-weight: 700;
  color: var(--text-primary);
}

/* ---------- PrincipleItem grid (build-spec §3d) ---------- */
.principle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 48px;
  margin-top: 44px;
  padding-top: 44px;
  border-top: 1px solid var(--border);
}
.principle { display: grid; grid-template-columns: auto 1fr; gap: 18px; }
.principle__num {
  font-size: var(--fs-chip);
  font-weight: 700;
  color: var(--accent-text);
  padding-top: 4px;
}
.principle__title {
  margin: 0 0 8px;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}
.principle__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: var(--lh-body);
  color: var(--text-muted);
}

/* ---------- About (build-spec §3f) ---------- */
.split--about { gap: 72px; }
.about__media { display: flex; flex-direction: column; gap: 18px; }
.portrait,
.portrait__img {
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: var(--r-portrait);
}
.portrait {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
}
.portrait__img { object-fit: cover; display: block; height: auto; } /* height attr must not beat aspect-ratio */
.portrait__icon { font-size: 1.625rem; color: var(--text-faint); }
.portrait__caption { font-size: var(--fs-chip); font-weight: 600; color: var(--text-muted); }
.portrait__hint {
  font-size: 0.6875rem;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
}
.about__name {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: var(--fs-body);
  font-weight: 600;
  color: var(--text-bright);
}
.about__dot {
  width: 9px;
  height: 9px;
  border-radius: var(--r-pill);
  background: var(--accent);
  box-shadow: var(--dot-glow);
}
.about__statement { margin-top: 18px; }
.about__credential {
  margin: 20px 0 0;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text-muted);
}

/* ---------- SiteFooter (build-spec §3g) ---------- */
.site-footer {
  background: var(--bg-footer);
  padding-top: var(--section-pad);
  padding-bottom: var(--section-pad);
}
.site-footer__cta {
  display: block;
  margin: 24px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8.5vw, 8rem);
  line-height: var(--lh-display);
  letter-spacing: var(--ls-serif);
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
}
.site-footer__arrow { color: var(--accent-text); }
.site-footer__cta:hover .site-footer__arrow { color: var(--accent); }

.site-footer__details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-split);
  margin-top: 72px;
  padding-top: 36px;
  border-top: 1px solid var(--border);
  max-width: 720px;
}
.site-footer__col { display: flex; flex-direction: column; gap: 12px; }
.site-footer__link {
  font-size: var(--fs-lead);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--hover-color-dur);
  padding-block: 12px;   /* 44px tap box */
  margin-block: -12px;
}
.site-footer__link:hover { color: var(--text-primary); }
.site-footer__copyright {
  margin: 56px 0 0;
  font-size: var(--fs-chip);
  color: var(--text-faint-2);
}

/* ---------- Accessibility: visible keyboard focus (build-spec §5) ---------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Responsive: collapse multi-column grids (build-spec §4) ---------- */
@media (max-width: 900px) {
  .split,
  .split--about { grid-template-columns: 1fr; gap: var(--gap-stack); }
  .split__label { position: static; }
  .case-card { grid-template-columns: 1fr; }
  .case-card__media,
  .image-slot { min-height: 280px; }
  .principle-grid { grid-template-columns: 1fr; gap: 28px; }
  .site-footer__details { grid-template-columns: 1fr; gap: 28px; max-width: none; }
}

@media (max-width: 600px) {
  .case-card__body { padding: 32px 26px; }
  .hero__subtext { margin-top: 36px; }

  /* Collapse the primary nav into a toggleable dropdown so the site
     name never has to wrap or fight the nav links for space. */
  .site-header__toggle { display: flex; }
  .site-header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
  }
  .site-header__nav.is-open { display: flex; }
  .site-header__link {
    padding: 16px var(--gutter);
    border-top: 1px solid var(--hairline);
    font-size: 0.9375rem;
  }
}

/* ---------- Skip link (a11y): hidden until keyboard focus ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: var(--gutter);
  z-index: 60; /* one step above the sticky headers (50) */
  background: var(--accent);
  color: var(--band-text);
  font-size: var(--fs-chip);
  font-weight: 700;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  text-decoration: none;
}
.skip-link:focus { top: 12px; }

/* ---------- No-JS fallback notice ---------- */
.noscript-notice {
  padding-top: var(--section-pad);
  padding-bottom: var(--section-pad);
}
.noscript-notice a { color: var(--accent-text); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .site-header__link,
  .site-header__toggle-bar,
  .case-card,
  .case-card__cta,
  .case-card__arrow,
  .site-footer__link { transition: none; }
  .case-card:hover .case-card__arrow { transform: none; }
}

/* ---------- Inline name emphasis (statements) ---------- */
.emph { color: var(--text-bright); font-weight: 600; }

/* ---------- What I Do: the three kinds of complexity ---------- */
.kind-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 44px;
  padding-top: 44px;
  border-top: 1px solid var(--border);
}
.kind-list .principle__title { font-size: 1.3125rem; }
.whatido__closing {
  margin: 40px 0 0;
  font-size: var(--fs-lead);
  line-height: var(--lh-body);
  color: var(--text-muted);
}

/* ---------- About credential: cap the only 75ch+ measure ---------- */
.about__credential { max-width: 66ch; }

/* ---------- Typeset: even heading rags, orphan-free prose ---------- */
.case-card__title,
.statement,
.section-opener__label { text-wrap: balance; }
.hero__lead,
.statement__body,
.whatido__closing { text-wrap: pretty; }

/* ---------- Thesis settle (transient; spans are removed after the animation) ---------- */
.hero__word { display: inline-block; white-space: nowrap; }
.hero__glyph { display: inline-block; will-change: transform, opacity, filter; }