/* ==========================================================================
   HANA 運動飲茶 — landing page
   Swiss grid, utilitarian labels, cinematic video. 12 columns throughout.
   ========================================================================== */

:root {
  /* Brand palette — HANA Red #AD2B0E and Black #000000 from the design system;
     a slightly darker silver stands in for Paper Beige */
  --paper: #D9D9D6;        /* silver */
  --paper-2: #CBCBC7;
  --ink: #000000;          /* black */
  --ink-2: #1E1E1E;
  --mute: #5C5C59;
  --red: #AD2B0E;          /* HANA red */
  --sub: #F2E7B8;          /* film-subtitle cream */
  --line: rgba(0, 0, 0, 0.2);
  --line-light: rgba(217, 217, 214, 0.3);

  /* Design system: Neue Haas Unica W1G (English) + 思源黑體 香港 / Source Han Sans HK (Chinese).
     Unica is a licensed font with no free web version, so visitors without it fall back to
     Helvetica Neue / Arial; Source Han Sans HK loads free from Google Fonts as Noto Sans HK. */
  --unica: "Neue Haas Unica W1G", "Neue Haas Unica", "NeueHaasUnicaW1G-Regular", "Helvetica Neue", Helvetica, Arial;
  --sans: var(--unica), "Noto Sans HK", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --cjk: "Source Han Sans HK", "Noto Sans HK", "PingFang HK", sans-serif;
  --helv: var(--sans);

  /* Tracking system — one value per type role, so spacing reads evenly site-wide.
     Large type is tightened a little (optical), small caps opened up, body left at 0. */
  --track-display: -0.01em;   /* main headlines */
  --track-sub: 0;             /* subheadlines, secondary headlines */
  --track-body: 0;            /* running text */
  --track-caps: 0.08em;       /* small uppercase labels, nav, buttons */
  --track-cjk: 0.04em;        /* Chinese, set close like the design system samples */
  --lh-display: 1;
  --lh-sub: 1.15;
  --lh-body: 1.45;

  /* Type scale — design system "full screen website" sizes (pt → px at 1.333),
     scaling down fluidly on smaller screens */
  --fs-main: clamp(44px, 5vw, 96px);        /* Main headline · Regular 72pt */
  --fs-secondary: clamp(28px, 2.5vw, 48px); /* Secondary headline · Light 36pt */
  --fs-sub: clamp(22px, 2.1vw, 40px);       /* Subheadline · Medium 30pt (中文 Bold) */
  --fs-body: 16px;                          /* Body · Regular 12pt */

  --m: clamp(16px, 2.2vw, 32px);     /* page margin */
  --gut: clamp(12px, 1.4vw, 20px);   /* column gutter */
  --ease: cubic-bezier(0.2, 0.7, 0.1, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  font-kerning: normal;
  font-feature-settings: "kern" 1;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p, dl, dd, figure, ul { margin: 0; padding: 0; }
ul { list-style: none; }
::selection { background: var(--red); color: var(--paper); }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gut);
  padding-inline: var(--m);
}

/* Small uppercase label voice — signage, spec sheets, shipping labels */
.label, .eyebrow, .nav, .idx, .fine, .cap, .num, .specs, .foot-base, .join__tag, dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: var(--track-caps);
  text-transform: uppercase;
  font-weight: 400;
}
.label--cjk { font-family: var(--cjk); letter-spacing: var(--track-cjk); }

/* ─────────────────────────── Header ─────────────────────────── */
/* Header is a transparent overlay at the top of every page — it sits on the opening
   video and scrolls away with it (no solid bar). Logo always top-left. */
.site-header {
  position: absolute; inset: 0 0 auto 0; z-index: 50;
  display: flex; justify-content: space-between; align-items: center;
  padding: 22px var(--m) 32px;
  color: #fff;
  background: linear-gradient(to bottom, rgba(0,0,0,0.4), rgba(0,0,0,0));
}
.brand { display: block; line-height: 0; }
.brand img { height: clamp(14px, 1.25vw, 20px); width: auto; }   /* wordmark only, no seal */
.nav {
  display: flex; align-items: center; gap: clamp(16px, 2.6vw, 40px);
  font-family: var(--sans); font-size: 13px; letter-spacing: var(--track-caps); white-space: nowrap;
}
.nav__meta { opacity: 0.6; }
.nav a { position: relative; }
.nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -3px; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }
.l-short { display: none; }

/* ─────────────────────────── Hero ─────────────────────────── */
.hero {
  position: relative;
  height: 100vh; height: 100svh; min-height: 560px;
  overflow: hidden;
  background: var(--ink);
  color: #fff;
}
.hero__video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover;
  filter: contrast(1.06) saturate(0.9);
}
.hero__shade {
  position: absolute; inset: 0;
  background:
    linear-gradient(to bottom, rgba(0,0,0,0.42) 0%, rgba(0,0,0,0) 18%, rgba(0,0,0,0) 62%, rgba(0,0,0,0.55) 100%),
    radial-gradient(ellipse at center, rgba(0,0,0,0) 45%, rgba(0,0,0,0.35) 100%);
}
.hero__side {
  position: absolute; top: 50%;
  writing-mode: vertical-rl;
  font-family: var(--cjk); font-size: 13px; letter-spacing: var(--track-cjk);
  transform: translateY(-50%);
  opacity: 0.85;
}
.hero__side--l { left: var(--m); }
.hero__side--r { right: var(--m); }
.hero__foot {
  position: absolute; left: 0; right: 0; bottom: clamp(28px, 5vh, 52px);
  display: flex; flex-direction: column; align-items: center; gap: 16px;
  padding-inline: var(--m); text-align: center;
}
.eyebrow { font-family: var(--sans); font-size: 13px; letter-spacing: var(--track-caps); text-wrap: balance; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  letter-spacing: var(--track-caps); text-transform: uppercase;
  border: 1px solid transparent; cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.btn--ghost {
  min-width: 214px; padding: 15px 40px;
  background: rgba(0, 0, 0,0.55); color: #fff;
  border-color: rgba(255,255,255,0.55);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.btn--ghost:hover { background: #fff; color: var(--ink); }
.btn--solid {
  padding: 22px 32px; background: var(--ink); color: var(--paper);
}
.btn--solid:hover { background: var(--red); }

/* ─────────────────────────── Ticker ─────────────────────────── */
/* Thin HANA-red strip between the hero and the email list */
.ticker {
  background: var(--red); color: var(--paper);
  overflow: hidden; white-space: nowrap;
  padding: 6px 0;
}
.ticker__track { display: inline-flex; animation: ticker 40s linear infinite; }
.ticker span {
  font-family: var(--mono); font-size: 11px; letter-spacing: var(--track-caps); text-transform: uppercase;
  padding-right: 2.4em;
}
.ticker .ticker__cjk { font-family: var(--cjk); letter-spacing: var(--track-cjk); }
.ticker span::before { content: "■"; font-size: 6px; vertical-align: 2px; margin-right: 2.4em; color: var(--ink); opacity: 0.55; }
@keyframes ticker { to { transform: translateX(-50%); } }

/* ─────────────────────────── Section head ─────────────────────────── */
.sec-head {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut);
  border-top: 1px solid var(--ink);
  padding-top: 12px;
  margin-bottom: clamp(48px, 8vw, 120px);
}
.sec-head .idx { grid-column: span 1; }
.sec-head .label { grid-column: span 4; }
.sec-head .label--cjk { grid-column: 12 / 13; justify-self: end; }
.sec-head--light { border-color: var(--line-light); color: var(--paper); }

/* ─────────────────────────── 01 About ─────────────────────────── */
/* All text lives on the plain brick wall in the left third of the footage; the runner and
   the steps sit centre-right (≈40–90% across), so the column is capped short of them */
.about {
  position: relative; overflow: hidden;
  min-height: 100vh; min-height: 100svh;
  background: var(--ink); color: var(--paper);
  display: flex;
}
.about__video {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  filter: contrast(1.05) saturate(0.9);
}
.about__shade {
  position: absolute; inset: 0;
  background:
    linear-gradient(to bottom, rgba(10,10,8,0.55) 0%, rgba(10,10,8,0) 30%, rgba(10,10,8,0) 70%, rgba(10,10,8,0.6) 100%),
    linear-gradient(to right, rgba(10,10,8,0.62) 0%, rgba(10,10,8,0.35) 26%, rgba(10,10,8,0) 36%);
}
.about__inner {
  position: relative; width: 100%;
  padding-top: clamp(80px, 10vw, 128px); padding-bottom: clamp(28px, 4vw, 48px);
  align-content: start;
}
.about__top { grid-column: 1 / -1; }
.about .sec-head { margin-bottom: clamp(32px, 4vw, 56px); }
.about__title {
  grid-column: 1 / -1; max-width: 28vw;
  font-weight: 400;
  font-size: var(--fs-main);
  line-height: var(--lh-display); letter-spacing: var(--track-display);
}
.about__sub {
  display: flex; align-items: baseline; gap: 0.8em;
  margin-top: 0.6em;
  font-size: var(--fs-sub); font-weight: 500; line-height: var(--lh-sub); letter-spacing: var(--track-sub);
  color: var(--red);
}
.about__sub-cjk { font-family: var(--cjk); font-size: 0.9em; font-weight: 700; letter-spacing: var(--track-cjk); }
.about__body {
  grid-column: 1 / -1; max-width: 28vw;
  margin-top: clamp(32px, 4vw, 64px);
  display: grid; gap: 0.9em;
}
.about__body p { font-size: var(--fs-body); line-height: var(--lh-body); letter-spacing: var(--track-body); text-shadow: 0 1px 12px rgba(0,0,0,0.35); }
.about__body .sign { font-family: var(--cjk); color: var(--paper); font-size: var(--fs-body); letter-spacing: var(--track-body); }

/* ─────────────────────────── Join page ─────────────────────────── */
/* Same full-bleed layout as the brand page, over the roadside photo in black & white.
   Text and form sit left; the runner stands right of centre. */
.about--join .about__video { filter: grayscale(1) contrast(1.12) brightness(0.9); object-position: 50% 60%; }
.about--join .about__body { max-width: max(34vw, 380px); }
.about--join .signup { margin-top: 12px; }
.about--join .signup input { color: var(--paper); border-color: var(--paper); }
.about--join .signup input::placeholder { color: var(--paper); }
.about--join .signup input:focus { border-color: var(--paper); box-shadow: inset 0 0 0 1px var(--paper); }
.about--join .btn--solid { background: var(--paper); color: var(--ink); }
.about--join .btn--solid:hover { background: var(--red); color: var(--paper); }
.about--join .signup__msg { color: var(--paper); }
.about--join .signup__msg.is-error { color: #FF9A85; }   /* lighter red so it reads on the dark photo */
.about--join .fine { color: var(--paper); opacity: 0.7; }
.about--join .signup__msg, .about--join .fine {   /* keep the small mono label style, not body copy */
  font-family: var(--mono); font-size: 12px; text-transform: uppercase;
  letter-spacing: var(--track-caps); text-shadow: none;
}

/* ─────────────────────────── 02 Product ─────────────────────────── */
.product {
  position: relative; overflow: hidden;
  min-height: 100vh; min-height: 100svh;
  background: var(--ink); color: var(--paper);
  display: flex;
}
.product__video {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  filter: contrast(1.08) saturate(0.85) brightness(0.84);
}
.product__shade {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(10,10,8,0.55) 0%, rgba(10,10,8,0.05) 35%, rgba(10,10,8,0.15) 60%, rgba(10,10,8,0.75) 100%);
}
.product__inner {
  position: relative; width: 100%;
  padding-top: clamp(80px, 10vw, 128px); padding-bottom: clamp(28px, 4vw, 48px);
  grid-template-rows: auto 1fr auto auto;
  align-items: end;
}
.product__title {
  grid-column: 1 / 9; grid-row: 3;
  font-weight: 400;
  font-size: var(--fs-main);
  line-height: var(--lh-display); letter-spacing: var(--track-display);
}
.product__no {
  display: block; font-family: var(--mono); font-size: 12px; letter-spacing: var(--track-caps);
  color: var(--paper); opacity: 0.75; margin-bottom: 18px;
}
.product__cjk {
  display: block; font-family: var(--cjk); font-weight: 700;
  font-size: var(--fs-sub); line-height: var(--lh-sub); letter-spacing: var(--track-cjk); margin-top: 0.5em; opacity: 0.9;
}
.specs { grid-column: 9 / 13; grid-row: 3; align-self: end; }
.specs li {
  display: grid; grid-template-columns: 2.4em 1fr;
  border-top: 1px solid var(--line-light);
  padding: 10px 0 12px;
}
.specs li span { opacity: 0.55; }
.subtitle {
  grid-column: 1 / -1; grid-row: 4;
  margin-top: clamp(40px, 6vw, 80px);
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  color: var(--paper); text-align: center;   /* same colour as the headline and specs */
  font-size: var(--fs-body);
  text-shadow: 0 1px 2px rgba(0,0,0,0.6);
}
.subtitle__cjk { font-family: var(--cjk); letter-spacing: var(--track-body); }

/* ─────────────────────────── Signup form (join page) ─────────────────────────── */
.signup { display: grid; gap: 14px; max-width: 640px; }
.signup input {
  width: 100%;
  font: 400 clamp(18px, 1.5vw, 22px) / 1 var(--sans);
  letter-spacing: var(--track-body);
  color: var(--ink); background: transparent;
  border: 1.5px solid var(--ink); border-radius: 0;
  padding: 22px 24px;
  outline: none;
  -webkit-appearance: none; appearance: none;
}
.signup input::placeholder { color: var(--ink); opacity: 0.85; text-transform: uppercase; }
.signup input:focus { border-color: var(--red); box-shadow: inset 0 0 0 1px var(--red); }
.signup input[aria-invalid="true"] { border-color: var(--red); }
.signup .btn { width: 100%; }
.signup__msg { min-height: 1.4em; font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: var(--track-caps); }
.signup__msg.is-error { color: var(--red); }
.fine { color: var(--mute); margin-top: 8px; }

/* ─────────────────────────── Next (sub-page CTA) ─────────────────────────── */
.next {
  display: grid; grid-template-columns: 1fr auto; align-items: end; row-gap: 10px;
  padding: clamp(40px, 6vw, 88px) var(--m);
  background: var(--paper); color: var(--ink);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s, color 0.3s;
}
.next .label { grid-column: 1 / -1; color: var(--mute); }
.next__title {
  font-weight: 300; font-size: var(--fs-secondary);
  line-height: var(--lh-sub); letter-spacing: var(--track-sub);
}
.next__arrow {
  font-size: var(--fs-secondary); font-weight: 300; line-height: var(--lh-sub);
  transition: transform 0.4s var(--ease);
}
.next:hover { background: var(--ink); color: var(--paper); }
.next:hover .next__arrow { transform: translateX(12px); color: var(--red); }

/* Product page: same link, laid straight over the video — no silver band */
.next--overlay {
  grid-column: 1 / -1; grid-row: 5;
  margin-top: clamp(28px, 4vw, 48px);
  padding: 16px 0 0;
  background: transparent; color: var(--paper);
  border-bottom: 0; border-top: 1px solid var(--line-light);
}
.next--overlay .label { color: var(--paper); opacity: 0.7; }
.next--overlay:hover { background: transparent; color: var(--paper); }

/* ─────────────────────────── Footer ─────────────────────────── */
.site-footer { background: var(--ink); color: var(--paper); padding-top: clamp(56px, 7vw, 96px); overflow: hidden; }
.foot-grid { row-gap: 32px; }
.foot-col { grid-column: span 3; display: flex; flex-direction: column; gap: 6px; font-size: var(--fs-body); }
.foot-col .label { color: var(--mute); margin-bottom: 8px; }
.foot-col p { max-width: 26ch; color: rgba(217, 217, 214,0.8); }
.foot-col a { width: fit-content; max-width: 100%; overflow-wrap: break-word; border-bottom: 1px solid transparent; transition: border-color 0.25s; }
.foot-col a:hover { border-color: currentColor; }
.foot-col--follow { grid-column: span 2; }
.foot-col--contact { grid-column: span 4; }
.foot-col--contact a { white-space: nowrap; }   /* email reads as one line */
/* One type size across the whole footer, matched to the email */
.site-footer { --fs-foot: clamp(11px, 1.45vw, 13px); }
.site-footer .label, .foot-col, .foot-col p, .foot-col a, .foot-base { font-size: var(--fs-foot); }
.foot-mark { padding: clamp(40px, 5vw, 64px) var(--m) 0; display: flex; justify-content: center; }
.foot-mark img { width: clamp(120px, 12vw, 180px); height: auto; }
.foot-base {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  border-top: 1px solid var(--line-light);
  margin: clamp(32px, 5vw, 64px) var(--m) 0;
  padding: 14px 0 20px;
  color: rgba(217, 217, 214,0.6);
}
.foot-base a:hover { color: var(--paper); }

/* ─────────────────────────── Intro (home) ─────────────────────────── */
/* Northstar line types out on black, then fades to the hero — after District Vision */
.intro { display: none; }
html.intro-on .intro {
  display: flex; align-items: center; justify-content: center;
  position: fixed; inset: 0; z-index: 100;
  padding: var(--m);
  background: var(--ink); color: var(--paper);
  cursor: pointer;
  transition: opacity 0.8s var(--ease), visibility 0.8s;
  animation: intro-failsafe 0.8s 6s forwards;   /* clears itself even if main.js never loads */
}
html.intro-on .intro.is-done { opacity: 0; visibility: hidden; }
@keyframes intro-failsafe { to { opacity: 0; visibility: hidden; } }
.intro__line {
  font-family: var(--helv); font-weight: 500;
  font-size: clamp(17px, 1.45vw, 22px); line-height: 1.2;
  letter-spacing: var(--track-body);
  text-align: center;
}
.intro__cursor {
  display: inline-block; width: 0.5em; height: 1em;
  margin-left: 3px; vertical-align: -0.14em;
  background: var(--red);
  animation: intro-blink 1s steps(1) infinite;
}
@keyframes intro-blink { 50% { opacity: 0; } }

/* ─────────────────────────── Film grain ─────────────────────────── */
.grain {
  position: fixed; inset: -50%; z-index: 60; pointer-events: none;
  opacity: 0.075;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 1.1 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation: grain 0.9s steps(6) infinite;
}
@keyframes grain {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-4%, 3%); }
  40%  { transform: translate(3%, -5%); }
  60%  { transform: translate(-2%, 6%); }
  80%  { transform: translate(5%, -2%); }
  100% { transform: translate(-3%, 4%); }
}

/* ─────────────────────────── Reveal ─────────────────────────── */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ─────────────────────────── Helvetica Neue ─────────────────────────── */
/* Headlines and body copy on the brand, product and email list sections */
.about__title, .about__sub, .about__body p, .about__body .sign,
.product__title { font-family: var(--helv); }
.about__sub-cjk { font-family: var(--cjk); }

/* ─────────────────────────── Responsive ─────────────────────────── */
@media (max-width: 1024px) {
  .meta-hide { display: none; }
  /* Narrow screens: all the text stacks over the wall in the top part of the frame; the
     runner on the steps sits in the bottom ~40%. main.js sets --about-h tall enough that
     the text ends above that. */
  .about { display: block; height: var(--about-h, 100svh); min-height: 0; }
  .about__inner {
    position: absolute; inset: 0;
    grid-template-columns: minmax(0, 1fr);
    padding-top: clamp(80px, 12vw, 104px); padding-bottom: 0;
  }
  .about__video { object-position: 64% center; }   /* keep the seated runner in a tall crop */
  .about--join .about__video { object-position: 62% center; }
  .about--join .about__body { max-width: 60ch; }
  .about__title, .about__body { max-width: 60ch; }
  .about__body { margin-top: 28px; }
  .about__shade {
    background: linear-gradient(to bottom,
      rgba(10,10,8,0.72) 0%, rgba(10,10,8,0.55) 45%, rgba(10,10,8,0) 60%);
  }
  .product__title { grid-column: 1 / -1; }
  .specs { grid-column: 1 / -1; grid-row: 4; margin-top: 40px; }
  .subtitle { grid-row: 5; }
  .next--overlay { grid-row: 6; }
}

@media (max-width: 760px) {
  .nav { font-size: 12px; gap: 16px; }
  .l-long { display: none; }
  .l-short { display: inline; }
  .hero__side { display: none; }
  .sec-head .label { grid-column: span 7; }
  .sec-head .label--cjk { grid-column: 11 / 13; }
  .foot-col { grid-column: span 6; }
  .foot-col--contact { grid-column: 1 / -1; }
  .foot-base { flex-direction: column; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .grain, .ticker__track { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}