/* Hallmark · ANYA v2 · genre: editorial · theme: Oura-direction
 * pre-emit critique: P5 H5 E5 S5 R4 V5
 * định vị: sức khoẻ bản thân trước, bố mẹ lớp hai
 * ảnh dẫn dắt: khối bo góc lồng nền, chữ đè lên ảnh, thẻ ảnh không viền
 */

@import url("./tokens.css");

/* ── Reset ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background: var(--color-paper);
  background-image: var(--grad-page);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-style: normal;
  font-variation-settings: "opsz" 100, "SOFT" 20;
  letter-spacing: var(--track-display);
  line-height: var(--leading-snug);
  overflow-wrap: anywhere;
  min-width: 0;
}

::selection { background: var(--color-accent-soft); color: var(--color-ink); }
:focus-visible { outline: 2px solid var(--color-focus-ring); outline-offset: 3px; border-radius: 4px; }

[id] { scroll-margin-top: 5.5rem; }

.skip {
  position: absolute; left: -9999px;
  background: var(--color-ink); color: var(--color-paper-soft);
  padding: var(--space-3) var(--space-5); z-index: var(--z-top);
  text-decoration: none; border-radius: 0 0 var(--radius-sm) 0;
}
.skip:focus { left: 0; top: 0; }

/* ── Shell + khối bo góc lồng nền ──────────────────── */
:root { --shell-max: 76rem; --shell-pad: clamp(1.15rem, 4vw, 2.5rem); }

.shell {
  width: 100%; max-width: var(--shell-max);
  margin-inline: auto; padding-inline: var(--shell-pad);
}
.frame {
  position: relative;
  margin-inline: var(--frame-inset);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  isolation: isolate;
}
.rail, .rail__track {
  --rail-inset: calc(max((100% - var(--shell-max)) / 2, 0px) + var(--shell-pad));
}

/* ── Chữ dùng chung ────────────────────────────────── */
.h-lg {
  font-size: var(--text-4xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--track-tight);
  max-width: 18ch;
}
.lede {
  margin-top: var(--space-5);
  font-size: var(--text-lg); line-height: 1.55;
  color: var(--color-ink-soft); max-width: 46ch;
}
.note, .disclaimer { font-size: var(--text-sm); color: var(--color-ink-mute); max-width: 62ch; }
.disclaimer { padding-top: var(--space-5); }

/* ── Ô ảnh (thay ô gạch chéo cũ) ───────────────────
   Có ảnh thật thì chỉ cần bỏ <img> vào trong <figure class="ph">,
   nhãn tự ẩn nhờ :has(). Tỉ lệ khung giữ nguyên nên không xô layout. */
.ph {
  position: relative; margin: 0; overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--grad-placeholder);
  display: grid; place-content: center; gap: var(--space-2);
  text-align: center; padding: var(--space-6);
}
.ph img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.ph:has(img) .ph__tag, .ph:has(img) .ph__desc { display: none; }
.ph__tag {
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: var(--track-wide); text-transform: uppercase;
  color: var(--color-accent-deep);
}
.ph__desc { font-size: var(--text-sm); color: var(--color-ink-mute); max-width: 34ch; }

.ph--portrait { aspect-ratio: 4 / 5; }
.ph--card     { aspect-ratio: 3 / 4; }
.ph--square   { aspect-ratio: 1 / 1; }
.ph--wide     { aspect-ratio: 16 / 10; }
.ph--hero     { aspect-ratio: 16 / 9; }
.ph--dark {
  background: var(--grad-ink);
}
.ph--dark .ph__desc { color: color-mix(in oklab, var(--color-paper-soft) 62%, transparent); }
.ph--dark .ph__tag  { color: var(--color-accent-soft); }
.ph--onink { background: color-mix(in oklab, var(--color-paper-soft) 8%, transparent); }
.ph--onink .ph__desc { color: color-mix(in oklab, var(--color-paper-soft) 60%, transparent); }
.ph--onink .ph__tag  { color: var(--color-accent-soft); }

/* ── Nút ───────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: var(--text-sm); font-weight: 600; line-height: 1;
  white-space: nowrap;
  padding: 1em 1.6em; min-height: 48px;
  border: var(--rule-hair) solid transparent;
  border-radius: 999px;
  background: var(--color-accent); color: var(--color-paper-soft);
  text-decoration: none; cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out),
              transform var(--dur-short) var(--ease-out);
}
.btn:hover  { background: var(--color-accent-deep); }
.btn:active { transform: translateY(1px); }
.btn--sm { padding: .7em 1.2em; min-height: 42px; }
.btn--light { background: var(--color-paper-soft); color: var(--color-ink); }
.btn--light:hover { background: var(--color-accent-soft); }
.btn--glass {
  background: color-mix(in oklab, var(--color-paper-soft) 20%, transparent);
  backdrop-filter: blur(10px) saturate(1.2);
  color: var(--color-paper-soft);
  border-color: color-mix(in oklab, var(--color-paper-soft) 45%, transparent);
}
.btn--glass:hover { background: color-mix(in oklab, var(--color-paper-soft) 32%, transparent); }
/* nút phụ trên nền ảnh SÁNG (hero) */
.btn--outline {
  background: color-mix(in oklab, var(--color-paper-soft) 55%, transparent);
  backdrop-filter: blur(8px) saturate(1.1);
  color: var(--color-ink);
  border-color: color-mix(in oklab, var(--color-ink) 32%, transparent);
}
.btn--outline:hover { background: var(--color-paper-soft); }

/* ── Nav ───────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: var(--z-nav);
  background: color-mix(in oklab, var(--color-paper) 86%, transparent);
  backdrop-filter: saturate(1.3) blur(14px);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-4); min-height: 68px;
}
.brand {
  font-family: var(--font-display); font-weight: 700;
  font-variation-settings: "opsz" 144, "SOFT" 0;
  font-size: var(--text-xl); letter-spacing: .02em;
  text-decoration: none; color: var(--color-ink);
}
.nav__rail { display: none; align-items: center; gap: var(--space-6); }
.nav__link {
  font-size: var(--text-sm); text-decoration: none;
  color: var(--color-ink-soft); white-space: nowrap;
  transition: color var(--dur-short) var(--ease-out);
}
.nav__link:hover { color: var(--color-accent-deep); }
@media (min-width: 52rem) { .nav__rail { display: inline-flex; } }

/* ══ 1 · Hero — chữ đè lên ảnh ═════════════════════ */
.hero { padding-block: var(--frame-inset) clamp(2.5rem, 5vw, 4.5rem); }
.hero__frame {
  display: grid;
  min-height: min(82svh, 660px);
}
/* ô ảnh phủ kín khối: nhãn dồn lên góc trên phải để không đè vào chữ */
.hero__frame > .ph, .close__frame > .ph {
  position: absolute; inset: 0; aspect-ratio: auto;
  border-radius: 0; z-index: 0;
  place-content: start end; text-align: end;
  padding: clamp(1rem, 2.5vw, 2rem);
}
.hero__frame > .ph .ph__desc, .close__frame > .ph .ph__desc { max-width: 26ch; }
/* Ảnh hero sáng (L=0.37) nên dùng chữ mực đậm, không dùng chữ trắng
   (chữ trắng chỉ đạt 2.5:1, dưới ngưỡng WCAG 3:1).
   Chữ đặt bên PHẢI vì ảnh chừa sẵn khoảng trống ở đó; chiếc vòng
   nằm bên trái được giữ nguyên, không bị lớp phủ làm mờ. */
.hero__frame::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: var(--scrim-light-bottom);
  pointer-events: none;
}
.hero__copy {
  position: relative; z-index: 2;
  align-self: end;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  max-width: 46rem;
}
@media (min-width: 52rem) {
  .hero__frame::after { background: var(--scrim-light-right), var(--scrim-light-bottom); }
  .hero__copy { justify-self: end; max-width: 34rem; align-self: center; }
  .hero__title { max-width: 14ch; }
  .hero__sub { max-width: 34ch; }
}
.hero__title {
  font-size: var(--text-display);
  line-height: var(--leading-tight);
  letter-spacing: var(--track-tight);
  color: var(--color-ink);
  max-width: 17ch;
  text-wrap: balance;
}
.hero__sub {
  margin-top: var(--space-5);
  font-size: var(--text-lg); line-height: 1.5;
  color: var(--color-ink-soft);
  max-width: 44ch;
}
.hero__actions { margin-top: var(--space-6); display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* ══ 2 · Đo liên tục ═══════════════════════════════ */
.always { padding-block: clamp(2.5rem, 6vw, 5rem); }
.always__grid { display: grid; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
@media (min-width: 58rem) { .always__grid { grid-template-columns: 1.05fr minmax(0, .95fr); } }

/* ══ 3 · Chỉ số ════════════════════════════════════ */
.metrics { padding-block: clamp(2.5rem, 6vw, 5rem); }
.metrics__title { margin-bottom: clamp(1.75rem, 4vw, 2.75rem); }

.rail {
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scroll-padding-inline-start: var(--rail-inset);
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.rail::-webkit-scrollbar { display: none; }
.rail__track {
  display: flex; gap: var(--space-4);
  padding-inline-start: var(--rail-inset);
  padding-inline-end: var(--shell-pad);
  padding-block: var(--space-1) var(--space-4);
  width: max-content;
}
.mcard {
  scroll-snap-align: start; flex: 0 0 auto;
  width: min(76vw, 320px);
  display: grid; gap: var(--space-4); align-content: start;
}
.mcard__title { font-size: var(--text-xl); line-height: 1.15; }
.mcard__body { font-size: var(--text-base); color: var(--color-ink-soft); line-height: 1.55; }

.rail__foot {
  margin-top: var(--space-5);
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  align-items: center; justify-content: space-between;
}
.rail__nav { display: flex; gap: var(--space-2); }
.railbtn {
  width: 48px; height: 48px; border-radius: 999px;
  border: var(--rule-hair) solid var(--color-rule);
  background: color-mix(in oklab, var(--color-paper-soft) 70%, transparent);
  color: var(--color-ink); cursor: pointer; font-size: var(--text-md);
  transition: border-color var(--dur-short) var(--ease-out),
              background-color var(--dur-short) var(--ease-out);
}
.railbtn:hover:not(:disabled) { border-color: var(--color-accent); background: var(--color-accent-wash); }
.railbtn:disabled { opacity: .3; cursor: default; }

/* ══ 4 · Chiếc vòng (khối tối) ═════════════════════ */
.device { padding-block: clamp(1.5rem, 3vw, 2.5rem); }
.device__frame {
  background: var(--grad-ink);
  color: var(--color-paper-soft);
  padding: clamp(2rem, 5vw, 4.5rem);
}
.device__title { color: var(--color-paper-soft); margin-bottom: clamp(2rem, 4vw, 3rem); }
.device__grid { display: grid; gap: clamp(2rem, 4vw, 3.5rem); align-items: center; }
@media (min-width: 58rem) { .device__grid { grid-template-columns: 1fr minmax(0, .82fr); } }

.device__tabs { display: grid; }
.tab {
  border-left: 2px solid color-mix(in oklab, var(--color-paper-soft) 20%, transparent);
  padding: var(--space-4) 0 var(--space-4) var(--space-5);
  transition: border-color var(--dur-mid) var(--ease-out);
}
.tab.is-active { border-left-color: var(--color-accent); }
.tab__h { margin: 0; font-size: inherit; }
.tab__btn {
  display: block; width: 100%; text-align: start;
  background: none; border: 0; padding: 0; cursor: pointer;
  font-family: var(--font-display); font-weight: 600;
  font-variation-settings: "opsz" 72, "SOFT" 20;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  letter-spacing: -.015em;
  color: color-mix(in oklab, var(--color-paper-soft) 42%, transparent);
  transition: color var(--dur-mid) var(--ease-out);
}
.tab.is-active .tab__btn, .tab__btn:hover { color: var(--color-paper-soft); }
.tab__panel { padding-top: var(--space-3); max-width: 44ch; }
.tab__panel p {
  color: color-mix(in oklab, var(--color-paper-soft) 72%, transparent);
  font-size: var(--text-base); line-height: 1.55;
}

.device__controls { margin-top: clamp(1.75rem, 3vw, 2.5rem); display: none; }
.js .device__controls { display: block; }
html:not(.js) .tab { border-left-color: var(--color-accent); }
html:not(.js) .rail__nav { display: none; }

.pausebtn {
  display: inline-flex; align-items: center; gap: .6ch;
  background: transparent;
  border: var(--rule-hair) solid color-mix(in oklab, var(--color-paper-soft) 30%, transparent);
  color: color-mix(in oklab, var(--color-paper-soft) 78%, transparent);
  border-radius: 999px; padding: .6em 1.1em; min-height: 44px;
  font-size: var(--text-sm); cursor: pointer; white-space: nowrap;
  transition: border-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out);
}
.pausebtn:hover { border-color: var(--color-accent-soft); color: var(--color-paper-soft); }
.pausebtn__icon {
  width: 11px; height: 12px;
  border-left: 3px solid currentColor; border-right: 3px solid currentColor;
}
.pausebtn.is-paused .pausebtn__icon {
  border: 0; width: 0; height: 0;
  border-top: 6px solid transparent; border-bottom: 6px solid transparent;
  border-left: 10px solid currentColor;
}

/* ══ 5 · Bốn màu dây ═══════════════════════════════ */
.straps { padding-block: clamp(2.5rem, 6vw, 5rem); }
.straps__chips { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }
.chip {
  border: var(--rule-hair) solid var(--color-rule);
  background: transparent; color: var(--color-ink-soft);
  border-radius: 999px; padding: .65em 1.4em; min-height: 44px;
  font-size: var(--text-sm); font-weight: 500; cursor: pointer; white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out),
              color var(--dur-short) var(--ease-out),
              border-color var(--dur-short) var(--ease-out);
}
.chip:hover { border-color: var(--color-accent-soft); color: var(--color-ink); }
.chip.is-active { background: var(--color-ink); color: var(--color-paper-soft); border-color: var(--color-ink); }
.straps__grid { margin-top: var(--space-6); display: grid; gap: var(--space-6); align-items: center; }
@media (min-width: 58rem) { .straps__grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); } }
.straps__caption { font-size: var(--text-lg); color: var(--color-ink-soft); max-width: 32ch; }

/* ══ 6 · Bố mẹ ═════════════════════════════════════ */
.parents { padding-block: clamp(2.5rem, 6vw, 5rem); }
.parents__grid { display: grid; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
@media (min-width: 58rem) { .parents__grid { grid-template-columns: minmax(0, 1fr) 1fr; } }

.principle {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  border-radius: var(--radius-xl);
  background: var(--grad-ink);
  color: var(--color-paper-soft);
  padding: clamp(1.75rem, 4vw, 3.25rem);
}
.principle__title {
  font-size: clamp(1.6rem, 3.4vw, 2.6rem); line-height: 1.08;
  color: var(--color-paper-soft); max-width: 18ch;
}
.principle__title em { font-style: normal; color: var(--color-accent-soft); }
.principle__body {
  margin-top: var(--space-5); max-width: 52ch;
  font-size: var(--text-lg); line-height: 1.55;
  color: color-mix(in oklab, var(--color-paper-soft) 78%, transparent);
}

/* ══ 7 · Ứng dụng ══════════════════════════════════ */
.app { padding-block: clamp(2.5rem, 6vw, 5rem); }
.app__grid { display: grid; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
@media (min-width: 58rem) { .app__grid { grid-template-columns: 1.05fr minmax(0, .95fr); } }

/* ══ 8 · So sánh ═══════════════════════════════════ */
.versus { padding-block: clamp(2.5rem, 6vw, 5rem); }
.versus__title { max-width: 20ch; }
.versus__grid { margin-top: clamp(2rem, 4vw, 3rem); display: grid; gap: var(--space-4); }
@media (min-width: 46rem) { .versus__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.vs { border-radius: var(--radius-xl); padding: clamp(1.5rem, 3vw, 2.5rem); }
.vs--other {
  background: color-mix(in oklab, var(--color-paper-warm) 55%, transparent);
  color: var(--color-ink-mute);
}
.vs--anya { background: var(--grad-warm), var(--color-accent-wash); }
.vs__label { font-size: var(--text-lg); margin-bottom: var(--space-4); color: var(--color-ink); }
.vs__list { display: grid; gap: var(--space-3); }
.vs__list li { font-size: var(--text-base); padding-left: 1.5em; position: relative; }
.vs--other .vs__list li::before { content: "×"; position: absolute; left: 0; }
.vs--anya .vs__list li { color: var(--color-ink); }
.vs--anya .vs__list li::before {
  content: "✓"; position: absolute; left: 0;
  color: var(--color-accent-deep); font-weight: 700;
}

/* ══ 9 · Đánh giá ══════════════════════════════════ */
.proof { padding-block: clamp(2rem, 4vw, 3.5rem); }
.flag {
  display: inline-block;
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--color-marine); background: var(--color-marine-soft);
  padding: .35em .8em; border-radius: 999px; margin-bottom: var(--space-5);
}
.quote { margin: 0; }
.quote__text {
  font-family: var(--font-display); font-weight: 500;
  font-variation-settings: "opsz" 144, "SOFT" 30;
  font-size: clamp(1.4rem, 3.2vw, 2.4rem); line-height: 1.25;
  max-width: 26ch; text-wrap: balance;
}

/* ══ 10 · Kết ══════════════════════════════════════ */
.close { padding-block: clamp(2rem, 4vw, 3rem) clamp(2.5rem, 5vw, 4rem); }
.close__frame { display: grid; min-height: min(66svh, 520px); }
.close__frame::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: var(--scrim-left), var(--scrim-bottom); pointer-events: none;
}
.close__copy {
  position: relative; z-index: 2; align-self: end;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  display: grid; gap: var(--space-6); justify-items: start;
}
.close__title {
  font-size: clamp(1.9rem, 4.6vw, 3.4rem); line-height: 1.06;
  color: var(--color-paper-soft); max-width: 17ch; text-wrap: balance;
}

/* ══ Footer ════════════════════════════════════════ */
.foot { padding-block: clamp(2.5rem, 5vw, 4rem); }
.foot__top { display: grid; gap: var(--space-5); align-items: end; }
@media (min-width: 52rem) { .foot__top { grid-template-columns: 1fr auto; } }
.foot__brand {
  font-family: var(--font-display); font-weight: 700;
  font-variation-settings: "opsz" 144, "SOFT" 0;
  font-size: var(--text-2xl); letter-spacing: .02em;
}
.foot__tag { margin-top: var(--space-2); color: var(--color-ink-soft); }
.foot__links { display: flex; flex-wrap: wrap; gap: var(--space-5); }
.foot__link {
  font-size: var(--text-sm); color: var(--color-ink-soft);
  text-decoration: none; white-space: nowrap;
  border-bottom: 1px solid transparent;
}
.foot__link:hover { border-color: var(--color-ink-soft); }
.foot__legal {
  margin-top: var(--space-6); padding-top: var(--space-5);
  border-top: var(--rule-hair) solid var(--color-rule);
  font-size: var(--text-sm); color: var(--color-ink-mute);
  max-width: 74ch; line-height: 1.55;
}
.foot__copy {
  margin-top: var(--space-4);
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-ink-mute);
}