/* ==========================================================================
   TRÉA — Doctors of Acupuncture
   Mobile-first. Tokens → base → components → sections → motion states.
   ========================================================================== */

:root {
  /* Palette */
  --forest: #1F3A2E;
  --deep: #16291F;
  --copper: #B87350;
  --copper-light: #D9A27E;
  --ivory: #EDE8DF;
  --warm: #F6F2EA;

  --ink: var(--deep);                         /* text on light */
  --ink-soft: rgba(22, 41, 31, .72);
  --on-dark: var(--ivory);                    /* text on dark */
  --on-dark-soft: rgba(237, 232, 223, .74);
  --hair-light: rgba(22, 41, 31, .16);
  --hair-dark: rgba(237, 232, 223, .18);

  --foil: linear-gradient(115deg, #B87350 0%, #D9A27E 32%, #BF7D58 52%, #E2B592 70%, #B87350 100%);

  /* Type */
  --serif: "Cormorant Garamond", "Cormorant", Garamond, "Times New Roman", serif;
  --sans: "Raleway", "Helvetica Neue", Arial, sans-serif;

  --t-display: clamp(2.75rem, 1.6rem + 5.6vw, 6.5rem);
  --t-h2: clamp(2.4rem, 1.7rem + 3.4vw, 4.5rem);
  --t-statement: clamp(1.75rem, 1.2rem + 2.6vw, 3.4rem);
  --t-h3: clamp(1.55rem, 1.35rem + .9vw, 2.1rem);
  --t-body: clamp(1rem, .96rem + .2vw, 1.0625rem);
  --t-small: .9375rem;
  --t-label: .75rem;

  /* Space & layout */
  --gutter: clamp(1.25rem, .6rem + 3.2vw, 3.5rem);
  --section: clamp(6rem, 3rem + 11vw, 12rem);
  --max: 88rem;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 4.5rem;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }
body {
  margin: 0;
  background: var(--ivory);
  color: var(--ink);
  font: 400 var(--t-body)/1.75 var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
h1, h2, h3, p, dl, dd, ol, figure { margin: 0; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--copper-light); color: var(--deep); }

:focus-visible { outline: 1px solid var(--copper); outline-offset: 4px; }
[data-theme="dark"] :focus-visible, .menu :focus-visible { outline-color: var(--copper-light); }

.container { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}
.skip-link {
  position: fixed; left: 1rem; top: 1rem; z-index: 100; padding: .75rem 1rem;
  background: var(--warm); color: var(--deep); transform: translateY(-200%);
}
.skip-link:focus { transform: none; }

/* Paper grain over green surfaces */
.grain { position: relative; isolation: isolate; }
.grain::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: url("../img/paper-grain.webp") repeat 0 0 / 256px 256px;
  mix-blend-mode: soft-light; opacity: .55;
}

/* ---------- Type roles ---------- */
.section-title {
  font: 300 var(--t-h2)/1.02 var(--serif);
  letter-spacing: -.012em;
}
.section-intro { max-width: 34rem; font-size: 1.0625rem; }
[data-theme="light"] .section-intro { color: var(--ink-soft); }
[data-theme="dark"] .section-intro { color: var(--on-dark-soft); }

.label, .footer__label, .doctor__cred, .treatment__meta dt, .field label, .standard__list dt {
  font: 300 var(--t-label)/1.4 var(--sans);
  letter-spacing: .24em;
  text-transform: uppercase;
}

/* ---------- Buttons & links ---------- */
.btn {
  --pad-y: 1.15em;
  display: inline-flex; align-items: center; justify-content: center; gap: .75em;
  padding: var(--pad-y) 2.4em;
  border: 0; border-radius: 999px;
  font: 500 .78rem/1 var(--sans); letter-spacing: .22em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
  transition: background-position .9s var(--ease), transform .4s var(--ease), box-shadow .4s var(--ease);
}
.btn--foil {
  color: var(--deep);
  background: var(--foil); background-size: 220% 100%; background-position: 0% 50%;
  box-shadow: inset 0 0 0 1px rgba(255, 244, 232, .25), 0 10px 30px -14px rgba(184, 115, 80, .6);
}
.btn--foil:hover { background-position: 100% 50%; transform: translateY(-1px); }
.btn--foil:active { transform: translateY(0); }

.link {
  text-decoration: none;
  background: linear-gradient(currentColor, currentColor) 0 100% / 100% 1px no-repeat;
  transition: background-size .5s var(--ease);
  padding-bottom: .1em;
}
.link:hover { background-size: 0 1px; background-position: 100% 100%; }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50;
  height: var(--header-h);
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  padding-inline: var(--gutter);
  color: var(--on-dark);
  transition: color .5s var(--ease);
}
.site-header[data-theme="light"] { color: var(--ink); }
.site-header::before { /* soft veil so the header stays legible over content */
  content: ""; position: absolute; inset: 0 0 -1.5rem; z-index: -1; pointer-events: none;
  background: linear-gradient(to bottom, var(--veil, rgba(22, 41, 31, .92)) 55%, transparent);
  opacity: 0; transition: opacity .5s var(--ease);
}
.site-header[data-theme="light"] { --veil: rgba(240, 236, 228, .94); }
.site-header.is-scrolled::before { opacity: 1; }
.site-header[data-menu]::before { opacity: 0; }

.menu-toggle {
  justify-self: start; display: inline-flex; align-items: center; gap: .8rem;
  padding: .75rem 0; background: none; border: 0; cursor: pointer;
  font: 400 var(--t-label)/1 var(--sans); letter-spacing: .24em; text-transform: uppercase;
}
.menu-toggle__icon { position: relative; width: 1.5rem; height: .5rem; }
.menu-toggle__icon::before, .menu-toggle__icon::after {
  content: ""; position: absolute; left: 0; right: 0; height: 1px; background: currentColor;
  transition: transform .5s var(--ease), top .5s var(--ease);
}
.menu-toggle__icon::before { top: 0; }
.menu-toggle__icon::after { top: 100%; }
.menu-toggle[aria-expanded="true"] .menu-toggle__icon::before { top: 50%; transform: rotate(20deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__icon::after { top: 50%; transform: rotate(-20deg); }

.site-header__mark {
  width: 2.1rem; aspect-ratio: 322 / 358;
  background: currentColor;
  -webkit-mask: url("../assets/brand/trea-mark.svg") center / contain no-repeat;
  mask: url("../assets/brand/trea-mark.svg") center / contain no-repeat;
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.site-header.at-hero .site-header__mark { opacity: 0; transform: translateY(-.4rem); pointer-events: none; }

.site-header__book {
  justify-self: end; text-decoration: none; padding: .75rem 0;
  font: 400 var(--t-label)/1 var(--sans); letter-spacing: .24em; text-transform: uppercase;
  background: linear-gradient(currentColor, currentColor) 0 calc(100% - .35rem) / 100% 1px no-repeat;
}
.site-header__book-long { display: none; }

/* ==========================================================================
   Menu overlay
   ========================================================================== */
.menu {
  position: fixed; inset: 0; z-index: 40;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: calc(var(--header-h) + 3rem) var(--gutter) 2.5rem;
  background: var(--forest); color: var(--on-dark);
  clip-path: inset(0 0 100% 0);
  transition: clip-path .9s var(--ease), visibility 0s .9s;
  visibility: hidden;
}
.menu[hidden] { display: flex; } /* kept in layout for the transition; visibility handles a11y */
.menu.is-open { clip-path: inset(0 0 0 0); visibility: visible; transition: clip-path .9s var(--ease); }
.menu__nav { display: flex; flex-direction: column; gap: .2rem; }
.menu__nav a {
  font: 300 clamp(2.6rem, 1.6rem + 5vw, 5.5rem)/1.12 var(--serif);
  text-decoration: none; width: fit-content;
  opacity: 0; transform: translateY(1.2rem);
  transition: opacity .6s var(--ease), transform .8s var(--ease), color .3s;
}
.menu.is-open .menu__nav a { opacity: 1; transform: none; }
.menu.is-open .menu__nav a:nth-child(2) { transition-delay: .06s; }
.menu.is-open .menu__nav a:nth-child(3) { transition-delay: .12s; }
.menu.is-open .menu__nav a:nth-child(4) { transition-delay: .18s; }
.menu__nav a:hover { color: var(--copper-light); }
.menu__foot {
  display: grid; gap: 1.25rem; font-size: var(--t-small); color: var(--on-dark-soft);
  border-top: 1px solid var(--hair-dark); padding-top: 1.5rem;
}
.menu__foot a { text-decoration: none; }

/* ==========================================================================
   1. Hero
   ========================================================================== */
.hero {
  min-height: 100svh;
  display: grid; place-items: center;
  padding: calc(var(--header-h) + 2rem) var(--gutter) 6rem;
  background: var(--deep); color: var(--on-dark);
  text-align: center; overflow: hidden;
}
.hero__light { /* a single soft pool of light, like a lamp over a treatment table */
  position: absolute; inset: -20% -10% auto; height: 90%; z-index: -2; pointer-events: none;
  background:
    radial-gradient(ellipse 45% 55% at 50% 30%, rgba(217, 162, 126, .13), transparent 70%),
    radial-gradient(ellipse 70% 60% at 50% 20%, rgba(31, 58, 46, .9), transparent 75%);
}
.hero__inner { display: flex; flex-direction: column; align-items: center; max-width: 60rem; }
.hero-logo { width: clamp(9.5rem, 6rem + 14vw, 17rem); height: auto; margin-bottom: clamp(2.5rem, 1.5rem + 3vw, 4rem); }
.hero__title {
  font: 300 var(--t-display)/1 var(--serif);
  letter-spacing: -.015em;
  text-wrap: balance;
}
.hero__lede {
  max-width: 30rem; margin-top: 1.75rem;
  color: var(--on-dark-soft); font-size: 1.0625rem;
  text-wrap: balance;
}
.hero__cta { margin-top: 2.5rem; }
.hero__scroll {
  position: absolute; left: 50%; bottom: 0; width: 1px; height: 4.5rem;
  background: var(--hair-dark); overflow: hidden;
}
.hero__scroll span {
  position: absolute; inset: 0; background: var(--copper-light);
  transform: translateY(-100%); animation: scroll-cue 2.8s var(--ease) infinite 3s;
}
@keyframes scroll-cue { 0% { transform: translateY(-100%); } 55%, 100% { transform: translateY(100%); } }

/* ==========================================================================
   2. Approach — statement + pinned ginkgo scene
   ========================================================================== */
.approach { background: var(--ivory); padding-block: var(--section); }
.statement {
  max-width: 62rem;
  font: 300 var(--t-statement)/1.18 var(--serif);
  letter-spacing: -.005em;
  text-wrap: pretty;
}
.approach__scene {
  display: grid; gap: 3rem;
  margin-top: clamp(4rem, 2rem + 8vw, 9rem);
}
.approach__art { color: var(--copper); }
.ginkgo { width: min(100%, 28rem); margin-inline: auto; overflow: visible; }
.ginkgo path { stroke-width: 1.1; vector-effect: non-scaling-stroke; }
.ginkgo .g-outline, .ginkgo .g-stem { stroke-width: 1.5; }
.approach__art figcaption {
  max-width: 20rem; margin: 1.5rem auto 0; text-align: center;
  font-size: .875rem; line-height: 1.6; color: var(--ink-soft);
}
.approach__notes { display: grid; gap: 3.5rem; }
.note { max-width: 28rem; padding-top: 1.5rem; border-top: 1px solid var(--hair-light); }
.note h3 { font: 400 var(--t-h3)/1.15 var(--serif); margin-bottom: .75rem; }
.note p { color: var(--ink-soft); }

/* ==========================================================================
   3. Treatments
   ========================================================================== */
.treatments { background: var(--forest); color: var(--on-dark); padding-block: var(--section); overflow: hidden; }
.section-head { display: grid; gap: 1.5rem; margin-bottom: clamp(3.5rem, 2rem + 5vw, 6.5rem); }
.treatment-list { display: grid; gap: 1.25rem; }
.treatment {
  position: relative;
  padding: clamp(2.25rem, 1.8rem + 2vw, 3.25rem) clamp(1.75rem, 1.4rem + 1.5vw, 2.5rem) 2.25rem;
  border: 1px solid var(--hair-dark);
  border-radius: 999px 999px 0 0 / 11rem 11rem 0 0;
  background: linear-gradient(to bottom, rgba(237, 232, 223, .045), rgba(237, 232, 223, 0) 70%);
  display: flex; flex-direction: column;
}
.treatment__icon {
  width: 4.75rem; height: 4.75rem; margin: 0 auto 2rem;
  fill: none; stroke: var(--copper-light); stroke-width: 1; stroke-linecap: round; stroke-linejoin: round;
}
.treatment__title { font: 400 var(--t-h3)/1.1 var(--serif); text-align: center; margin-bottom: 1.1rem; }
.treatment p { color: var(--on-dark-soft); text-align: center; max-width: 22rem; margin-inline: auto; }
.treatment__meta {
  margin-top: auto; padding-top: 2rem;
  display: grid; gap: .6rem;
}
.treatment__meta div {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding-top: .6rem; border-top: 1px solid var(--hair-dark);
}
.treatment__meta dt { color: var(--on-dark-soft); }
.treatment__meta dd { font: 400 1.125rem/1.3 var(--serif); }

/* ==========================================================================
   4. The doctors
   ========================================================================== */
.doctors { background: var(--warm); padding-block: var(--section); }
.doctor-list { display: grid; gap: 3.5rem; }
.doctor { max-width: 24rem; }
.plate { /* temporary herbarium plate in place of a portrait */
  position: relative; aspect-ratio: 4 / 5;
  margin-bottom: 1.75rem;
  background: var(--ivory);
  border-radius: 2px;
  box-shadow: 0 1px 0 rgba(22, 41, 31, .05), 0 18px 40px -28px rgba(22, 41, 31, .45);
}
.plate::before { /* the thin mat line of a framed print */
  content: ""; position: absolute; inset: .75rem; pointer-events: none;
  border: 1px solid var(--hair-light);
}
.plate.grain::after { opacity: .4; }
.herb { position: absolute; inset: 6% 8% 16%; width: 84%; height: 78%; }
.herb .h-line { stroke: var(--forest); stroke-width: 1.1; vector-effect: non-scaling-stroke; }
.herb .h-fill { fill: var(--copper); }
.plate__label {
  position: absolute; left: 1.6rem; right: 1.6rem; bottom: 1.35rem;
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding-top: .6rem; border-top: 1px solid var(--hair-light);
}
.plate__label i { font: italic 400 1.0625rem/1.2 var(--serif); }
.plate__label span {
  font: 300 .6875rem/1.2 var(--sans); letter-spacing: .2em; text-transform: uppercase;
  color: var(--ink-soft); white-space: nowrap;
}
.doctor__name { font: 400 var(--t-h3)/1.1 var(--serif); }
.doctor__cred { margin-top: .6rem; color: var(--ink-soft); }
.doctor__focus { margin-top: .9rem; color: var(--ink-soft); max-width: 20rem; }

.standard { margin-top: clamp(5rem, 3rem + 7vw, 9rem); padding-top: 3rem; border-top: 1px solid var(--hair-light); }
.standard__title { font: 300 clamp(1.9rem, 1.4rem + 2vw, 2.9rem)/1.1 var(--serif); max-width: 22ch; margin-bottom: 2.75rem; }
.standard__list { display: grid; gap: 2.25rem; }
.standard__list dt { margin-bottom: .75rem; }
.standard__list dd { color: var(--ink-soft); max-width: 26rem; }

/* ==========================================================================
   5. Booking
   ========================================================================== */
.book { background: var(--deep); color: var(--on-dark); padding-block: var(--section); }
.book__grid { display: grid; gap: 4rem; }
.book__intro .section-intro { margin-top: 1.5rem; }
.book__steps-title { margin-top: 3.5rem; margin-bottom: 1.25rem; font: 400 1.5rem/1.2 var(--serif); }
.steps { list-style: none; padding: 0; counter-reset: step; display: grid; gap: 1.1rem; max-width: 30rem; }
.steps li {
  counter-increment: step; position: relative; padding-left: 3rem;
  color: var(--on-dark-soft);
}
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: -.2rem;
  width: 2rem; height: 2rem; border-radius: 50%; border: 1px solid var(--hair-dark);
  display: grid; place-items: center;
  font: 400 1rem/1 var(--serif); color: var(--on-dark);
}
.steps strong { font-weight: 500; color: var(--on-dark); }

.booking-form {
  display: grid; gap: 1.75rem;
  padding: clamp(1.75rem, 1rem + 3vw, 3.25rem);
  border: 1px solid var(--hair-dark); border-radius: 1.25rem;
  background: rgba(237, 232, 223, .03);
  align-self: start;
}
.field-row { display: grid; gap: 1.75rem; }
.field { display: grid; gap: .55rem; }
.field label { color: var(--on-dark-soft); }
.optional { text-transform: none; letter-spacing: .02em; opacity: .7; }
.field input, .field select, .field textarea {
  width: 100%; padding: .55rem 0 .7rem;
  border: 0; border-bottom: 1px solid var(--hair-dark); border-radius: 0;
  background: transparent; color: var(--on-dark);
  font: 400 1.2rem/1.4 var(--serif);
  transition: border-color .3s var(--ease);
  -webkit-appearance: none; appearance: none;
}
.field textarea { resize: vertical; min-height: 5.5rem; }
.field select {
  cursor: pointer; padding-right: 1.75rem;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23EDE8DF' stroke-width='1'/%3E%3C/svg%3E") right .2rem center / .75rem no-repeat;
}
.field select option { background: var(--deep); color: var(--ivory); }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-bottom-color: var(--copper-light); }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { box-shadow: 0 1px 0 0 var(--copper-light); }
.field input[aria-invalid="true"] { border-bottom-color: #E0A89A; }
.field__error { min-height: 0; font-size: .875rem; color: #F0C3B6; }
.field__error:empty { display: none; }
.booking-form__submit { justify-self: start; margin-top: .5rem; }
.booking-form__submit[disabled] { opacity: .6; cursor: progress; }
.booking-form__status { font: 400 1.25rem/1.4 var(--serif); color: var(--on-dark); }
.booking-form__status:empty { display: none; }
.booking-form.is-sent .field, .booking-form.is-sent .field-row, .booking-form.is-sent .booking-form__submit { display: none; }
.booking-form.is-sent .booking-form__status { font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.2rem); }

/* ==========================================================================
   6. Footer
   ========================================================================== */
.site-footer { background: var(--ivory); padding-top: clamp(5rem, 3rem + 6vw, 8rem); overflow: hidden; }
.footer__grid { display: grid; gap: 2.5rem; font-size: 1.0625rem; }
.footer__label { color: var(--ink-soft); margin-bottom: 1rem; }
.footer__grid p + p { margin-top: .75rem; }
.hours { display: grid; gap: .35rem; }
.hours div { display: flex; justify-content: space-between; gap: 1rem; max-width: 20rem; }
.hours dd { color: var(--ink-soft); }
.footer__wordmark {
  width: calc(100% - 2 * var(--gutter)); max-width: calc(var(--max) - 2 * var(--gutter));
  margin: clamp(4rem, 2rem + 6vw, 7rem) auto 0;
  aspect-ratio: 660 / 252;
  background: var(--forest);
  -webkit-mask: url("../assets/brand/trea-wordmark.svg") center bottom / contain no-repeat;
  mask: url("../assets/brand/trea-wordmark.svg") center bottom / contain no-repeat;
}
.footer__legal {
  display: grid; gap: .5rem;
  padding-block: 2rem 2.5rem; margin-top: 2.5rem;
  border-top: 1px solid var(--hair-light);
  font-size: .8125rem; color: var(--ink-soft);
}

/* ==========================================================================
   Tablet & desktop
   ========================================================================== */
@media (min-width: 40em) {
  .field-row { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__legal { grid-template-columns: 1fr auto; }
  .site-header__book-long { display: inline; }
  .site-header__book-short { display: none; }
}

@media (min-width: 56em) {
  :root { --header-h: 5.5rem; }
  .section-head { grid-template-columns: 1fr 1fr; align-items: end; }
  .section-head .section-intro { justify-self: end; }

  .approach__scene { grid-template-columns: 5fr 6fr; gap: clamp(3rem, 6vw, 8rem); align-items: start; }
  .approach__art {
    position: sticky; top: calc(50vh - 19rem);
    padding-top: 2rem;
  }
  .ginkgo { width: min(100%, 38rem); }
  .approach__notes { gap: 0; padding-block: 12vh 22vh; }
  .note { padding-block: 2rem 0; min-height: 42vh; }

  .treatment-list { grid-template-columns: repeat(3, 1fr); gap: clamp(1rem, 2vw, 2rem); align-items: start; }
  .treatment { min-height: 36rem; }
  .treatment:nth-child(2) { margin-top: 7rem; }
  .treatment:nth-child(3) { margin-top: 3.5rem; }

  .doctor-list { grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 3vw, 3.5rem); }
  .doctor:nth-child(2) { margin-top: 5rem; }
  .standard { display: grid; grid-template-columns: 5fr 7fr; gap: 3rem; }
  .standard__title { margin-bottom: 0; }
  .standard__list { grid-template-columns: 1fr; }

  .book__grid { grid-template-columns: 5fr 6fr; gap: clamp(3rem, 7vw, 8rem); align-items: start; }
  .book__intro { position: sticky; top: calc(var(--header-h) + 3rem); }
}

@media (min-width: 80em) {
  .standard__list { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
  .standard { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Motion states (only when JS motion is running)
   ========================================================================== */
.motion-pending .hero__inner { visibility: hidden; }
.motion [data-fade] { opacity: 0; transform: translateY(1.5rem); }
.motion .hero__title, .motion .hero__lede, .motion .hero__cta { visibility: hidden; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
}