/* =====================================================================
   ClinicOS — Shared components
   Header · Footer · Button · Card · Media placeholder · Statement
   Used by every page. Page-specific layout lives in the page stylesheet.
   ===================================================================== */

/* ---------------------------------------------------------------------
   Button
   --------------------------------------------------------------------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--c-text);
  --btn-line: var(--c-line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  min-height: 48px;
  padding: 0 var(--sp-6);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-line);
  border-radius: var(--r-pill);
  font-family: var(--ff-sans);
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1;
  white-space: nowrap;
  transition: background var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  --btn-bg: var(--c-ink);
  --btn-fg: var(--c-text-invert);
  --btn-line: var(--c-ink);
}
.btn--primary:hover {
  --btn-bg: var(--c-accent-deep);
  --btn-line: var(--c-accent-deep);
}

.btn--ghost { --btn-fg: var(--c-text); --btn-line: var(--c-line); }
.btn--ghost:hover { --btn-line: var(--c-text); }

.btn--on-ink {
  --btn-bg: var(--c-text-invert);
  --btn-fg: var(--c-ink);
  --btn-line: var(--c-text-invert);
}
.btn--on-ink:hover { --btn-bg: #FFFFFF; --btn-line: #FFFFFF; }

.btn--ghost-on-ink {
  --btn-fg: var(--c-text-invert);
  --btn-line: var(--c-line-invert);
}
.btn--ghost-on-ink:hover { --btn-line: var(--c-text-invert); }

.btn--sm { min-height: 42px; padding: 0 var(--sp-5); font-size: var(--fs-small); }

/* Quiet text link with a rule that extends on hover */
.link-quiet {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-text);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--c-line);
}
.link-quiet:hover { border-bottom-color: currentColor; }
.link-quiet .arrow {
  transition: transform var(--dur-base) var(--ease-out);
  font-size: 0.9em;
}
.link-quiet:hover .arrow { transform: translateX(4px); }
.section--ink .link-quiet { color: var(--c-text-invert); border-bottom-color: var(--c-line-invert); }

/* ---------------------------------------------------------------------
   Header
   --------------------------------------------------------------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              backdrop-filter var(--dur-base) var(--ease-out);
}
.header.is-stuck {
  background: rgba(247, 245, 242, 0.82);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom-color: var(--c-line-soft);
}
.header.is-hidden { transform: translateY(-100%); transition: transform var(--dur-base) var(--ease-out); }

.header__inner {
  width: 100%;
  max-width: var(--grid-max);
  margin-inline: auto;
  padding-inline: var(--grid-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}

.brandmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6875rem;              /* 11px between mark and words */
  font-family: var(--ff-display);
  font-size: 1rem;             /* ClinicOS — 16px */
  font-weight: 600;
  letter-spacing: 0.005em;
}
/* The footer carries the full horizontal lockup. */
.footer__logo { display: inline-block; }
.footer__logo img {
  display: block;
  width: auto;
  height: 62px;
  max-width: 100%;
}
@media (max-width: 640px) { .footer__logo img { height: 50px; } }
/* Official symbol. Never recoloured, never recropped — only scaled. */
.brandmark__mark {
  width: 32px;
  height: 32px;
  flex: none;
  display: block;
}
@media (max-width: 480px) { .brandmark__mark { width: 30px; height: 30px; } }
.brandmark__sub {
  font-family: var(--ff-sans);
  font-size: 0.875rem;         /* 珂立雲 — 14px */
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--c-text);
  opacity: 0.65;
  padding-left: 0.6rem;
  border-left: 1px solid var(--c-line);
}

.nav { display: none; }
@media (min-width: 900px) {
  .nav {
    display: flex;
    align-items: center;
    gap: clamp(1.75rem, 2.6vw, 3rem);
  }
}
.nav__link {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--c-text-soft);
  position: relative;
  padding-block: 4px;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--dur-base) var(--ease-editorial);
}
.nav__link:hover { color: var(--c-text); }
.nav__link:hover::after { transform: scaleX(1); transform-origin: left center; }
.nav__link[aria-current="page"] { color: var(--c-text); }
.nav__link[aria-current="page"]::after { transform: scaleX(1); opacity: 0.3; }
.menu__link[aria-current="page"] { color: var(--c-accent); }

.header__actions { display: flex; align-items: center; gap: var(--sp-4); }
/* The header ask is a real button, not a ghost. */
.header__cta {
  display: none;
  --btn-bg: var(--c-ink);
  --btn-fg: var(--c-text-invert);
  --btn-line: var(--c-ink);
  min-height: 44px;
  padding-inline: var(--sp-6);
  font-size: 0.9375rem;
  letter-spacing: 0.06em;
}
.header__cta:hover { --btn-bg: var(--c-accent-deep); --btn-line: var(--c-accent-deep); }
@media (min-width: 900px) { .header__cta { display: inline-flex; } }

/* Menu toggle (mobile) */
.menu-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  align-items: flex-end;
}
@media (min-width: 900px) { .menu-toggle { display: none; } }
.menu-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--c-text);
  transition: transform var(--dur-base) var(--ease-out),
              opacity var(--dur-fast) var(--ease-out),
              width var(--dur-base) var(--ease-out);
}
.menu-toggle span:last-child { width: 14px; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { width: 22px; transform: translateY(-3px) rotate(-45deg); }

/* Mobile menu */
.menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background: var(--c-paper);
  padding: calc(var(--header-h) + var(--sp-8)) var(--grid-gutter) var(--sp-8);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out),
              visibility var(--dur-base);
}
.menu.is-open { opacity: 1; visibility: visible; transform: none; }
@media (min-width: 900px) { .menu { display: none; } }

.menu__list { display: flex; flex-direction: column; gap: var(--sp-5); }
.menu__link {
  font-family: var(--ff-display);
  font-size: clamp(1.75rem, 8vw, 2.5rem);
  line-height: 1.3;
}
.menu__foot { display: flex; flex-direction: column; gap: var(--sp-4); }
.menu__meta { font-size: var(--fs-meta); letter-spacing: var(--ls-meta); text-transform: uppercase; color: var(--c-text-mute); }

/* ---------------------------------------------------------------------
   Media placeholder — grayscale, honest, replaceable
   --------------------------------------------------------------------- */
.media {
  position: relative;
  overflow: hidden;
  background: var(--c-paper-sunken);
  border-radius: var(--r-md);
}
.media > picture { display: block; height: 100%; }
.media > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: var(--media-pos, center);
}
/* The photography runs a little cooler than the paper it sits on. A hairline
   gives that edge somewhere to land — a mat, not a frame: no shadow, no
   border-box shift, nothing that reads as a card. */
.media--photo { box-shadow: inset 0 0 0 1px var(--c-line); }
.media--ink { background: var(--c-ink-raised); }
.media--ink::after {
  background: repeating-linear-gradient(
    -45deg,
    rgba(243, 241, 238, 0.03) 0 1px,
    transparent 1px 9px
  );
}

.media--3-4 { aspect-ratio: 3 / 4; }
.media--4-3 { aspect-ratio: 4 / 3; }
.media--1-1 { aspect-ratio: 1 / 1; }
.media--16-9 { aspect-ratio: 16 / 9; }
.media--21-9 { aspect-ratio: 21 / 9; }
@media (max-width: 700px) {
  .media--21-9 { aspect-ratio: 4 / 3; }
}

/* Caption under media */
.caption {
  margin-top: var(--sp-4);
  font-size: var(--fs-meta);
  letter-spacing: 0.08em;
  color: var(--c-text-mute);
}

/* ---------------------------------------------------------------------
   Index label — a small monospace marker above a block
   --------------------------------------------------------------------- */
.card__index {
  font-family: var(--ff-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.16em;
  color: var(--c-text-mute);
}
.section--ink .card__index { color: var(--c-text-invert-mute); }

/* ---------------------------------------------------------------------
   Brand moment — every page has exactly one. Same voice, same type,
   same colour; the measure, the indent and the air vary per page so the
   eight moments read as a family rather than a template.
   --------------------------------------------------------------------- */
.quote { max-width: 24ch; }
.quote--tight { max-width: 20ch; }
.quote--wide { max-width: 28ch; }
@media (min-width: 900px) {
  .quote--indent { margin-left: 8.333%; }
}

/* How much silence a moment gets depends on how little it says. */
.section--quote-airy { padding-block: calc(var(--section-y-vast) * 1.3); }
.section--quote-close { padding-block: var(--section-y); }

/* ---------------------------------------------------------------------
   Statement — an oversized editorial line, alone on the page
   --------------------------------------------------------------------- */
.statement {
  font-family: var(--ff-display);
  font-size: var(--fs-h1);
  line-height: 1.45;
  font-weight: 400;
  text-wrap: balance;
}
.statement em {
  font-style: normal;
  color: var(--c-accent);   /* deep pine on paper */
}
.section--ink .statement em { color: var(--c-accent-soft); }

/* ---------------------------------------------------------------------
   Signature — the brand line. Appears quietly, more than once.
   --------------------------------------------------------------------- */
.signature {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-4);
  font-family: var(--ff-display);
  font-size: var(--fs-h3);
  font-weight: 400;
  line-height: 1.5;
  color: var(--c-text);
}
.signature::before {
  content: "";
  width: clamp(28px, 5vw, 56px);
  height: 1px;
  background: var(--c-accent-soft);
  flex: none;
}
.section--ink .signature { color: var(--c-text-invert); }

/* ---------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------- */
.footer {
  background: var(--c-paper);
  border-top: 1px solid var(--c-line);
  padding-block: var(--sp-10) var(--sp-8);
}
.footer__top {
  display: grid;
  gap: var(--sp-8);
  grid-template-columns: 1fr;
}
@media (min-width: 800px) {
  .footer__top { grid-template-columns: 1.7fr 1fr 1fr; gap: clamp(3rem, 1.5rem + 6vw, 7rem); }
}
.footer__blurb { margin-top: var(--sp-4); max-width: 34ch; font-size: 0.9375rem; line-height: 1.9; color: var(--c-text-soft); }
.footer__col-title {
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--ff-display);
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--c-text);
  color: var(--c-text-mute);
  margin-bottom: var(--sp-5);
}
.footer__list { display: flex; flex-direction: column; gap: var(--sp-4); }
.footer__list a { font-size: 0.9375rem; color: var(--c-text-soft); }
/* the legal name sits between the lockup and the promise */
.footer__brand-name { margin-top: 20px; font-size: 1rem; font-weight: 500; font-family: var(--ff-display); color: var(--c-text); }
.footer__list a:hover { color: var(--c-text); }
@media (max-width: 640px) { .footer__brand-name { margin-top: 16px; } }
.footer__bottom {
  margin-top: var(--sp-10);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--c-line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4) var(--sp-6);
  justify-content: space-between;
  font-size: var(--fs-meta);
  letter-spacing: 0.08em;
  color: var(--c-text-mute);
}