/* ============================================================
   JING — Scandi-Swiss variant
   International Typographic Style · Mobile-first
   ============================================================ */

/* -------- Tokens -------- */
:root {
  --paper:    #FAFAFA;
  --ink:      #0A0A0A;
  --ink-60:   rgba(10,10,10,0.60);
  --ink-40:   rgba(10,10,10,0.40);
  --ink-20:   rgba(10,10,10,0.20);
  --ink-12:   rgba(10,10,10,0.12);
  --ink-08:   rgba(10,10,10,0.08);

  /* The one committed accent: Klein blue. Used sparingly. */
  --accent:   #1B2A78;

  --hair:     1px;
  --hair-h:   0.5px;

  --pad:      24px;       /* mobile gutter */
  --pad-t:    40px;       /* tablet gutter */
  --pad-d:    72px;       /* desktop gutter */

  --rail:     56px;       /* mast height mobile */

  --font-sans: "Inter Tight", "Inter", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-han:  "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", var(--font-sans);
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --tr-fast:   200ms cubic-bezier(.2,.6,.2,1);
  --tr-mid:    700ms cubic-bezier(.2,.6,.2,1);
}

/* -------- Reset -------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.005em;
  font-feature-settings: "ss01", "cv11", "tnum" 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button, input { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 1px solid var(--accent); outline-offset: 3px; }

/* -------- Type utilities -------- */
.caps {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 500;
}
.mono {
  font-family: var(--font-mono);
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* =====================================================
   MASTHEAD
   ===================================================== */
.mast {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: var(--hair) solid var(--ink);
}
.mast__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  height: var(--rail);
  padding: 0 var(--pad);
}
.mast__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
}
.mast__brand-han {
  font-family: var(--font-han);
  font-weight: 500;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0;
}
.mast__center {
  display: none;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
}
.mast__center-dot { color: var(--accent); margin: 0 8px; }
.mast__center-zh { font-family: var(--font-han); letter-spacing: 0.12em; }
.mast__lang {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
}
.mast__lang a { padding: 4px 2px; }
.mast__lang a[aria-current="true"] { color: var(--accent); }
.mast__lang span { color: var(--ink-40); }

@media (min-width: 720px) {
  .mast { --rail: 64px; }
  .mast__center { display: inline-flex; align-items: baseline; }
}

/* =====================================================
   GLOBAL SECTION SCAFFOLD
   ===================================================== */
.sect {
  padding: 96px var(--pad) 96px;
  border-top: var(--hair) solid var(--ink);
}
.sect:first-of-type { border-top: 0; }

.sect__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: var(--hair-h) solid var(--ink-20);
}
.numeral {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin: 0;
}
.label {
  font-size: 11px;
  margin: 0;
  color: var(--ink);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--tr-mid), transform var(--tr-mid);
}
.reveal.is-in { opacity: 1; transform: none; }

@media (min-width: 720px) {
  .sect { padding: 144px var(--pad-t) 144px; }
  .sect__head { padding-bottom: 56px; margin-bottom: 56px; gap: 24px; }
  .numeral { font-size: 13px; }
}
@media (min-width: 1100px) {
  .sect { padding: 200px var(--pad-d) 200px; }
}

/* =====================================================
   OPENING
   ===================================================== */
.opening {
  min-height: calc(100svh - var(--rail));
  padding: 88px var(--pad) 56px;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 16px;
  position: relative;
}
.opening__inner {
  align-self: center;
  display: grid;
  gap: 28px;
}
.opening__eyebrow {
  font-size: 10px;
  color: var(--accent);
  margin: 0;
}
.opening__title {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(44px, 13vw, 92px);
  line-height: 0.96;
  letter-spacing: -0.035em;
  margin: 0;
  text-wrap: balance;
}
.opening__meta {
  font-size: 10px;
  color: var(--ink-60);
  margin: 0;
}
.opening__scroll {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 10px;
  color: var(--ink-60);
}
.opening__scroll-rule {
  display: inline-block;
  width: 56px;
  height: var(--hair-h);
  background: var(--ink);
}

@media (min-width: 720px) {
  .opening { padding: 112px var(--pad-t) 72px; }
  .opening__title { font-size: clamp(72px, 11vw, 136px); }
}
@media (min-width: 1100px) {
  .opening { padding: 160px var(--pad-d) 96px; }
  .opening__title { font-size: clamp(112px, 9vw, 168px); }
}

/* =====================================================
   N°01 — TWO COLUMN
   ===================================================== */
.sect--two .sect__body {
  display: grid;
  gap: 32px;
}
.lede {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(22px, 5.4vw, 30px);
  line-height: 1.32;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 30ch;
}
.byline {
  font-size: 10px;
  color: var(--ink-60);
  margin: 0;
}
@media (min-width: 720px) {
  .sect--two { display: grid; grid-template-columns: 4fr 8fr; gap: 48px; }
  .sect--two .sect__head { grid-column: 1; padding-bottom: 0; margin-bottom: 0; border-bottom: 0; flex-direction: column; grid-template-columns: 1fr; gap: 12px; }
  .sect--two .sect__body { grid-column: 2; }
  .lede { font-size: clamp(28px, 3.2vw, 40px); max-width: 24ch; }
}

/* =====================================================
   N°02 — OBJECT
   ===================================================== */
.object {
  margin: 0;
  display: grid;
  gap: 40px;
  justify-items: center;
}
.object__stage {
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  position: relative;
  display: grid;
  place-items: center;
}
.object__shadow {
  position: absolute;
  left: 12%; right: 12%;
  bottom: 14%;
  height: 14%;
  background: radial-gradient(ellipse at center,
    rgba(10,10,10,0.18) 0%,
    rgba(10,10,10,0.10) 30%,
    rgba(10,10,10,0.00) 70%);
  filter: blur(6px);
  border-radius: 50%;
}
.object__ball {
  position: relative;
  width: 68%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 30%,
      #ffffff 0%,
      #F4F1EA 32%,
      #ECEAE3 60%,
      #D9D4C8 92%,
      #BFB8A8 100%);
  box-shadow:
    inset -10px -14px 28px rgba(10,10,10,0.10),
    inset 10px 14px 22px rgba(255,255,255,0.55);
}
.object__ball-tone {
  position: absolute; inset: 0; border-radius: 50%;
  background: radial-gradient(circle at 70% 76%, rgba(10,10,10,0.08), transparent 55%);
  pointer-events: none;
}
.object__ball-spec {
  position: absolute;
  top: 12%; left: 18%;
  width: 22%; aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(255,255,255,0.85), rgba(255,255,255,0) 65%);
  filter: blur(2px);
}
.object__ball-mark {
  position: absolute;
  right: 16%;
  bottom: 22%;
  font-family: var(--font-han);
  font-weight: 500;
  font-size: clamp(14px, 4vw, 22px);
  color: var(--accent);
  letter-spacing: 0;
  opacity: 0.86;
}
.object__caption {
  display: grid;
  gap: 12px;
  justify-items: center;
  text-align: center;
}
.object__caption .mono {
  font-size: 10px;
  color: var(--ink-60);
  margin: 0;
}
.object__line {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(18px, 4.6vw, 24px);
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 22ch;
}

/* =====================================================
   N°03 — SPECIFICATIONS
   ===================================================== */
.specs {
  margin: 0;
  padding: 0;
  border-top: var(--hair) solid var(--ink);
}
.specs__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-bottom: var(--hair-h) solid var(--ink-20);
}
.specs__row:last-child { border-bottom: var(--hair) solid var(--ink); }
.specs dt {
  margin: 0;
  display: grid;
  gap: 4px;
}
.specs dt .mono {
  font-size: 10px;
  color: var(--ink-60);
}
.specs__zh {
  font-family: var(--font-han);
  font-size: 11px;
  color: var(--ink-40);
  letter-spacing: 0.08em;
}
.specs dd {
  margin: 0;
  font-weight: 300;
  font-size: clamp(16px, 4.4vw, 20px);
  letter-spacing: -0.01em;
  text-align: right;
}
.specs__sub { font-size: 10px; color: var(--ink-40); margin-left: 6px; }

@media (min-width: 720px) {
  .specs__row { grid-template-columns: 1fr 1fr 1fr; padding: 22px 0; }
  .specs dt { grid-column: 1 / span 1; grid-template-columns: 1fr 1fr; align-items: baseline; }
  .specs dd { grid-column: 2 / -1; text-align: right; font-size: clamp(20px, 2.2vw, 24px); }
}

/* =====================================================
   N°04 — COLOURWAYS
   ===================================================== */
.colours {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 24px;
}
.colour { display: grid; gap: 10px; }
.colour__tile {
  width: 100%;
  aspect-ratio: 1 / 1;
  border: var(--hair-h) solid var(--ink-12);
}
.colour__tile[data-tone="paper"]  { background: #ECEAE3; }
.colour__tile[data-tone="jade"]   { background: #7E8F7C; }
.colour__tile[data-tone="clay"]   { background: #B07C5B; }
.colour__tile[data-tone="walnut"] { background: #5A3E2B; }
.colour__tile[data-tone="ink"]    { background: #141414; }

.colour__no    { font-size: 9px;  color: var(--ink-40); margin: 0; }
.colour__name  { font-size: 11px; margin: 0; }
.colour__hex   { font-size: 10px; color: var(--ink-60); margin: 0; }

@media (min-width: 720px) {
  .colours { grid-template-columns: repeat(5, 1fr); gap: 32px; }
}

/* =====================================================
   N°05 — APPLICATION
   ===================================================== */
.apps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--hair) solid var(--ink);
}
.app {
  padding: 28px 0;
  border-bottom: var(--hair-h) solid var(--ink-20);
  display: grid;
  grid-template-columns: 72px 1fr;
  column-gap: 16px;
  row-gap: 6px;
  align-items: baseline;
}
.app:last-child { border-bottom: var(--hair) solid var(--ink); }
.app__no { font-size: 10px; color: var(--accent); margin: 0; }
.app__name { font-size: 11px; margin: 0; grid-column: 2; }
.app__line {
  grid-column: 2;
  margin: 0;
  font-weight: 300;
  font-size: clamp(22px, 5.6vw, 30px);
  line-height: 1.18;
  letter-spacing: -0.02em;
}
.app__cap { grid-column: 2; font-size: 10px; color: var(--ink-60); margin: 4px 0 0; }

@media (min-width: 720px) {
  .apps {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    border-top: var(--hair) solid var(--ink);
    border-bottom: var(--hair) solid var(--ink);
  }
  .app {
    padding: 40px 32px 40px 0;
    border-bottom: 0;
    border-right: var(--hair-h) solid var(--ink-20);
  }
  .app:nth-child(2n) { border-right: 0; padding-right: 0; padding-left: 32px; }
  .app:nth-child(1), .app:nth-child(2) { border-bottom: var(--hair-h) solid var(--ink-20); }
  .app__line { font-size: clamp(26px, 3vw, 36px); }
}
@media (min-width: 1100px) {
  .apps { grid-template-columns: repeat(4, 1fr); }
  .app {
    padding: 48px 24px;
    border-right: var(--hair-h) solid var(--ink-20);
    border-bottom: 0 !important;
  }
  .app:nth-child(4) { border-right: 0; }
  .app:nth-child(2n) { padding-left: 24px; }
}

/* =====================================================
   N°06 — INVERTED ESSAY
   ===================================================== */
.sect--note {
  background: var(--ink);
  color: var(--paper);
  border-top: var(--hair) solid var(--ink);
}
.sect--note .sect__head { border-bottom: var(--hair-h) solid rgba(250,250,250,0.20); }
.numeral--inv { color: var(--accent); }
.sect--note .label { color: var(--paper); }

.note { display: grid; gap: 40px; }
.note__essay {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(22px, 5.4vw, 32px);
  line-height: 1.32;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 28ch;
  color: var(--paper);
}
.note__sig {
  font-size: 10px;
  color: rgba(250,250,250,0.60);
  margin: 0;
}

@media (min-width: 720px) {
  .sect--note { display: grid; grid-template-columns: 4fr 8fr; gap: 48px; }
  .sect--note .sect__head { grid-column: 1; padding-bottom: 0; margin-bottom: 0; border-bottom: 0; grid-template-columns: 1fr; gap: 12px; }
  .note { grid-column: 2; }
  .note__essay { font-size: clamp(28px, 3.2vw, 44px); max-width: 22ch; }
}

/* =====================================================
   N°07 — RESERVE
   ===================================================== */
.reserve { display: grid; gap: 36px; }
.reserve__title {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(28px, 7vw, 44px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin: 0;
  max-width: 18ch;
}
.reserve__form { display: grid; gap: 12px; }
.reserve__label {
  font-size: 10px;
  color: var(--ink-60);
  margin: 0;
}
.reserve__row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: stretch;
  border-top: var(--hair) solid var(--ink);
  border-bottom: var(--hair) solid var(--ink);
}
.reserve__input {
  background: transparent;
  border: 0;
  padding: 18px 0;
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 18px;
  letter-spacing: -0.01em;
  min-width: 0;
}
.reserve__input::placeholder { color: var(--ink-40); }
.reserve__input:focus { outline: none; }
.reserve__btn {
  padding: 0 22px;
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 500;
  border-left: var(--hair) solid var(--ink);
  color: var(--paper);
  background: var(--accent);
  transition: background var(--tr-fast);
}
.reserve__btn:hover { background: var(--ink); }
.reserve__msg {
  min-height: 1.4em;
  font-size: 10px;
  color: var(--accent);
  margin: 0;
}
.reserve__foot {
  font-size: 10px;
  color: var(--ink-60);
  margin: 0;
}

@media (min-width: 720px) {
  .reserve { grid-template-columns: 4fr 8fr; gap: 48px; align-items: start; }
  .reserve__title { font-size: clamp(36px, 4vw, 56px); }
  .reserve__form { grid-column: 2; }
  .reserve__foot { grid-column: 2; }
}

/* =====================================================
   COLOPHON
   ===================================================== */
.colophon {
  border-top: var(--hair) solid var(--ink);
  padding: 28px var(--pad);
}
.colophon__inner {
  display: grid;
  gap: 4px;
}
.colophon__line {
  font-size: 10px;
  color: var(--ink-60);
  margin: 0;
}
@media (min-width: 720px) {
  .colophon { padding: 36px var(--pad-t); }
  .colophon__inner {
    grid-template-columns: 1fr auto;
    align-items: baseline;
    gap: 24px;
  }
  .colophon__line + .colophon__line { text-align: right; }
}

/* =====================================================
   Reduced motion
   ===================================================== */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition: none !important; animation: none !important; }
}