/* SAUNAMIES teaser site. Plain CSS, no build step.
   Palette from Finnish materials: tar-black wood, birch bark, kelo (weathered pine),
   punamulta (red ochre paint), sauna lamplight and the aurora. */

@font-face {
  font-family: "Bricolage Grotesque";
  src: url("/fonts/bricolage-grotesque.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

/* Only the letters of SAUNAMIES (1.7 KB), so the hero wordmark renders fast. */
@font-face {
  font-family: "Saunamies Wordmark";
  src: url("/fonts/saunamies-wordmark.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Newsreader";
  src: url("/fonts/newsreader.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Newsreader";
  src: url("/fonts/newsreader-italic.woff2") format("woff2");
  font-weight: 200 800;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("/fonts/ibm-plex-mono.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@property --temp {
  syntax: "<integer>";
  inherits: true;
  initial-value: 78;
}

:root {
  color-scheme: dark;

  --tar: #12100e;        /* smoke-blackened sauna wood */
  --soot: #1d1915;
  --birch: #ede6d9;      /* birch bark */
  --kelo: #a69d8f;       /* weathered silver pine */
  --kelo-dark: #5c554b;
  --punamulta: #8e3520;  /* red ochre cottage paint */
  --punamulta-deep: #5e2214;
  --lamp: #e9b872;       /* sauna lamplight */
  --aurora: #8ed1b4;     /* revontulet */
  --line: rgb(237 230 217 / 0.14);

  --display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --wordmark: "Saunamies Wordmark", "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --gutter: clamp(1rem, 4vw, 3rem);
  --max: 76rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--tar);
  color: var(--birch);
  font: 400 1.125rem/1.6 var(--serif);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  interpolate-size: allow-keywords;
}

body {
  margin: 0;
  background: var(--tar);
  overflow-x: clip;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--aurora);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--aurora);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--punamulta);
  color: var(--birch);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  background: var(--birch);
  color: var(--tar);
  font-family: var(--mono);
  translate: 0 -200%;
}

.skip-link:focus {
  translate: 0 0;
}

/* Small mono labels: kicker, section numbers, image notes. */
.label,
.kicker,
.hero-note,
.section-head,
figcaption .meta {
  font: 400 0.75rem/1.4 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100svh;
  isolation: isolate;
  overflow: hidden;
  background: #0b1018;
}

.hero-media,
.hero-media img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 45%;
}

/* Darken the top for the bar and the bottom for the wordmark. */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgb(11 16 24 / 0.55) 0%, transparent 18%),
    linear-gradient(0deg, var(--tar) 0%, rgb(18 16 14 / 0.85) 18%, transparent 52%);
}

/* Light falling snow over the still (one tiled layer, transform only). */
.hero::after {
  content: "";
  position: absolute;
  inset: -100% 0 0;
  z-index: -1;
  pointer-events: none;
  background-image: url("/img/snow.svg");
  background-size: 300px 300px;
  opacity: 0.55;
  animation: snow 40s linear infinite;
}

@keyframes snow {
  to {
    transform: translate3d(-60px, 50%, 0);
  }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding: 1rem var(--gutter);
}

.kicker {
  margin: 0;
  color: var(--birch);
}

.kicker::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.6rem;
  border-radius: 50%;
  background: var(--lamp);
  box-shadow: 0 0 0.75rem var(--lamp);
  vertical-align: 0.05em;
}

.lang-switch {
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font: 400 0.8125rem/1 var(--mono);
  letter-spacing: 0.08em;
}

.lang-switch a,
.lang-switch [aria-current] {
  display: block;
  padding: 0.65rem 0.7rem;
  color: var(--kelo);
  text-decoration: none;
}

.lang-switch [aria-current] {
  color: var(--birch);
  box-shadow: inset 0 -1px 0 var(--birch);
}

.lang-switch a:hover {
  color: var(--birch);
}

.hero-copy {
  grid-row: 3;
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding: 0 var(--gutter) clamp(1.5rem, 5svh, 3.5rem);
}

.wordmark {
  margin: 0 0 0 -0.04em;
  color: var(--birch);
  font: 800 clamp(3.1rem, 15.2vw, 13.5rem)/0.82 var(--wordmark);
  letter-spacing: -0.045em;
}

.hero-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-top: clamp(1rem, 2.5vw, 1.75rem);
}

.tagline {
  max-width: 28rem;
  margin: 0;
  font: italic 400 clamp(1.25rem, 2.6vw, 1.75rem)/1.3 var(--serif);
  text-wrap: balance;
}

.hero-note {
  max-width: 22rem;
  text-wrap: balance;
  margin: 0;
  color: var(--kelo);
  text-align: right;
}

/* ---------- Sections ---------- */

main > section {
  padding: clamp(4rem, 10vw, 8rem) var(--gutter);
}

.wrap {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: clamp(1rem, 2.5vw, 2rem);
  max-width: var(--max);
  margin-inline: auto;
}

.section-head {
  grid-column: 1 / span 3;
  margin: 0 0 2rem;
  padding-top: 0.9rem;
  border-top: 1px solid currentColor;
  color: var(--kelo);
  font-weight: 400;
}

.section-head .num {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--birch);
}

.section-body {
  grid-column: 5 / -1;
}

@media (max-width: 52rem) {
  .section-head,
  .section-body {
    grid-column: 1 / -1;
  }
}

/* ---------- The game ---------- */

.lede {
  margin: 0 0 1.5rem;
  font: 400 clamp(1.6rem, 3.6vw, 2.75rem)/1.18 var(--serif);
  letter-spacing: -0.012em;
  text-wrap: pretty;
}

.lede em {
  color: var(--lamp);
}

.intro .section-body > p:not(.lede) {
  max-width: 34rem;
  margin: 0;
  color: var(--kelo);
  font-size: 1.1875rem;
}

/* ---------- Stills ---------- */

.stills {
  padding-top: 0;
}

.stills .wrap {
  row-gap: clamp(2.5rem, 6vw, 5rem);
}

.still {
  margin: 0;
}

.still img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--soot);
}

.still--a { grid-column: 1 / span 7; }
.still--b { grid-column: 8 / -1; align-self: end; }
.still--c { grid-column: 2 / span 5; }
.still--d { grid-column: 7 / -1; margin-top: clamp(0rem, 8vw, 7rem); }

@media (max-width: 52rem) {
  .still--a,
  .still--b,
  .still--c,
  .still--d {
    grid-column: 1 / -1;
    margin-top: 0;
  }
}

figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding-top: 0.75rem;
}

figcaption .cap {
  font: italic 400 1.125rem/1.35 var(--serif);
}

figcaption .meta {
  color: var(--kelo);
}

/* ---------- Current conditions (the löyly switch) ---------- */

.conditions {
  background: var(--punamulta);
  color: var(--birch);
}

.conditions .section-head {
  color: rgb(237 230 217 / 0.82);
}

.readings {
  display: grid;
  grid-template-columns: auto 1fr;
  margin: 0;
  font: 400 clamp(1rem, 1.6vw, 1.125rem)/1.3 var(--mono);
  font-variant-numeric: tabular-nums;
}

.readings dt,
.readings dd {
  padding: 1rem 0;
  border-bottom: 1px solid rgb(237 230 217 / 0.3);
}

.readings dt {
  padding-right: 1.5rem;
  color: rgb(237 230 217 / 0.82);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
}

.readings dd {
  margin: 0;
  font: 600 clamp(1.4rem, 3vw, 2.25rem)/1.1 var(--display);
  letter-spacing: -0.02em;
  text-align: right;
}

.temp-reading {
  counter-reset: temp var(--temp);
  transition: --temp 18s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.temp-reading .temp::before {
  content: counter(temp);
}

.loyly {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.5rem 0;
  font: 600 1.125rem/1.2 var(--display);
  cursor: pointer;
  user-select: none;
}

.switch input {
  appearance: none;
  position: relative;
  flex: none;
  width: 3.5rem;
  height: 2rem;
  margin: 0;
  border: 1.5px solid var(--birch);
  border-radius: 1rem;
  background: var(--punamulta-deep);
  cursor: pointer;
  transition: background-color 0.3s;
}

.switch input::before {
  content: "";
  position: absolute;
  top: 0.22rem;
  left: 0.22rem;
  width: 1.375rem;
  height: 1.375rem;
  border-radius: 50%;
  background: var(--birch);
  transition: translate 0.3s, background-color 0.3s;
}

.switch input:checked {
  background: var(--birch);
}

.switch input:checked::before {
  background: var(--punamulta);
  translate: 1.5rem 0;
}

.switch input:focus-visible {
  outline-color: var(--birch);
}

.loyly-reply {
  margin: 0;
  font: italic 400 1.5rem/1.2 var(--serif);
  opacity: 0;
  transition: opacity 0.6s;
}

.steam {
  position: fixed;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  background:
    radial-gradient(60% 45% at 30% 100%, rgb(255 255 255 / 0.55), transparent 70%),
    radial-gradient(55% 40% at 70% 100%, rgb(255 255 255 / 0.45), transparent 70%),
    radial-gradient(90% 60% at 50% 100%, rgb(237 230 217 / 0.35), transparent 75%);
  opacity: 0;
  translate: 0 40%;
}

body:has(#loyly:checked) {
  --temp: 96;
}

body:has(#loyly:checked) .temp-reading {
  transition-duration: 3s;
}

body:has(#loyly:checked) .loyly-reply {
  opacity: 1;
  transition-delay: 2.4s;
}

body:has(#loyly:checked) .steam {
  animation: steam 4.5s ease-out forwards;
}

@keyframes steam {
  0% { opacity: 0; translate: 0 40%; }
  30% { opacity: 1; }
  100% { opacity: 0; translate: 0 -30%; }
}

/* ---------- FAQ (birch paper) ---------- */

.faq {
  background: var(--birch);
  color: var(--tar);
}

.faq .section-head {
  color: var(--kelo-dark);
}

.faq .section-head .num {
  color: var(--tar);
}

.faq a {
  color: var(--punamulta);
}

.faq :focus-visible {
  outline-color: var(--punamulta);
}

.faq details {
  border-bottom: 1px solid rgb(18 16 14 / 0.18);
}

.faq details:first-of-type {
  border-top: 1px solid rgb(18 16 14 / 0.18);
}

.faq summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.15rem 0;
  font: 600 clamp(1.15rem, 2vw, 1.4rem)/1.3 var(--display);
  letter-spacing: -0.01em;
  cursor: pointer;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  flex: none;
  color: var(--punamulta);
  font: 400 1.5rem/1 var(--mono);
  transition: rotate 0.25s;
}

.faq details[open] summary::after {
  rotate: 45deg;
}

.faq details::details-content {
  height: 0;
  overflow: clip;
  transition: height 0.3s ease, content-visibility 0.3s allow-discrete;
}

.faq details[open]::details-content {
  height: auto;
}

.faq details p {
  max-width: 36rem;
  margin: 0 0 1.25rem;
  font-size: 1.1875rem;
}

/* ---------- Follow + footer ---------- */

.follow .section-body p {
  max-width: 34rem;
  margin: 0;
  font: 400 clamp(1.3rem, 2.4vw, 1.75rem)/1.3 var(--serif);
}

footer {
  padding: 0 var(--gutter) 2.5rem;
  color: var(--kelo);
  font: 400 0.8125rem/1.6 var(--mono);
}

footer .wrap {
  row-gap: 0.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

footer p {
  grid-column: span 4;
  margin: 0;
}

footer .disclosure {
  grid-column: span 8;
}

@media (max-width: 52rem) {
  footer p,
  footer .disclosure {
    grid-column: 1 / -1;
  }
}

/* Decorative wordmark, drawn by CSS so it isn't read out or checked as text. */
footer::before {
  content: "SAUNAMIES";
  display: block;
  margin: 0 0 1.5rem;
  color: var(--soot);
  font: 800 clamp(3rem, 15.2vw, 13.5rem)/0.8 var(--wordmark);
  letter-spacing: -0.045em;
  text-align: center;
  user-select: none;
}

/* ---------- Language hint (shown by JS only) ---------- */

.lang-hint {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  z-index: 6;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 1rem;
  max-width: 26rem;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  background: rgb(29 25 21 / 0.96);
  font: 400 0.875rem/1.4 var(--mono);
}

.lang-hint[hidden] {
  display: none;
}

.lang-hint button {
  padding: 0.4rem 0.6rem;
  border: 0;
  background: none;
  color: var(--kelo);
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

/* ---------- 404 ---------- */

.lost {
  display: grid;
  place-content: center;
  min-height: 100svh;
  padding: var(--gutter);
  text-align: center;
}

.lost h1 {
  margin: 0 0 1.25rem;
  font: 800 clamp(2.2rem, 7vw, 4.5rem)/1 var(--display);
  letter-spacing: -0.03em;
}

.lost p {
  max-width: 30rem;
  margin: 0 auto 1rem;
}

/* ---------- Motion + small screens ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero::after {
    animation: none;
  }

  .temp-reading,
  body:has(#loyly:checked) .temp-reading {
    transition: none;
  }

  body:has(#loyly:checked) .steam {
    animation: none;
  }

  body:has(#loyly:checked) .loyly-reply {
    transition-delay: 0s;
  }
}

@media (max-width: 40rem) {
  .hero-note {
    text-align: left;
  }

  .kicker {
    font-size: 0.6875rem;
  }
}