:root {
  --wood: #2a1810;
  --wood-2: #3d2418;
  --heart: #6b3a24;
  --copper: #b87333;
  --patina: #4a6b5a;
  --oil: #c9a227;
  --cream: #f0e4c8;
  --mute: #cbb99a;
  --late: #c45c32;
  --ok: #7d9a6e;
  --serif: "Source Serif 4", "Noto Serif SC", serif;
  --sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

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

html {
  scroll-behavior: smooth;
}

section[id] {
  scroll-margin-top: 92px;
}

body {
  margin: 0;
  color: var(--cream);
  background: var(--wood);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.app-link {
  color: var(--oil);
  text-decoration: underline;
  text-underline-offset: 3px;
}

button {
  font-family: inherit;
  cursor: pointer;
}

code {
  font-family: var(--mono);
  background: rgba(201, 162, 39, 0.16);
  padding: 0.05em 0.35em;
}

.patina {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  opacity: 0.22;
  background-image: url("images/texture.webp");
  background-size: 280px auto;
  mix-blend-mode: overlay;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 40;
  background: var(--cream);
  color: var(--wood);
  padding: 0.4rem 0.8rem;
}

.kettle-rail {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 1.2rem;
  background: rgba(42, 24, 16, 0.94);
  border-bottom: 2px solid var(--copper);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--serif);
  font-weight: 700;
}

.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  color: var(--mute);
  letter-spacing: 0.1em;
}

.oil-bead {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #f3e08a, var(--oil) 55%, #7a5a12);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.25);
}

.nav-toggle {
  margin-left: auto;
  background: transparent;
  color: var(--cream);
  border: 1px solid var(--oil);
  padding: 0.3rem 0.65rem;
  font-family: var(--mono);
}

.kettle-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.95rem;
  font-size: 0.92rem;
}

.kettle-nav a.is-active {
  color: var(--oil);
}

.kettle-nav .live {
  background: var(--oil);
  color: var(--wood);
  padding: 0.2rem 0.65rem;
}

main {
  position: relative;
  z-index: 2;
}

.hero figure {
  margin: 0;
}

.hero img {
  width: 100%;
  height: min(62vh, 560px);
  object-fit: cover;
  filter: saturate(0.92);
}

.hero-copy {
  width: min(1080px, calc(100% - 2rem));
  margin: -4.5rem auto 0;
  position: relative;
  background: var(--wood-2);
  border: 1px solid var(--copper);
  padding: 1.8rem 1.4rem 2rem;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--oil);
  margin: 0 0 0.55rem;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  line-height: 1.2;
  margin: 0 0 0.7rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.3rem);
}

.lead {
  max-width: 72ch;
  color: var(--mute);
  margin: 0 0 1rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.chip {
  font-family: var(--mono);
  font-size: 0.74rem;
  border: 1px solid rgba(201, 162, 39, 0.45);
  padding: 0.12rem 0.45rem;
}

.chip.warn {
  background: var(--late);
  border-color: var(--late);
  color: #fff;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  font-family: var(--serif);
  border: 1px solid var(--oil);
}

.btn-fill {
  background: var(--oil);
  color: var(--wood);
}

.vat {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3.1rem 0;
}

.vat-head {
  margin-bottom: 1.6rem;
}

.vlabel {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--oil);
  margin: 0 0 0.35rem;
  white-space: nowrap;
}

.vat-head h2 {
  font-size: clamp(1.45rem, 3vw, 2.05rem);
}

.vat-head p {
  margin: 0;
  color: var(--mute);
}

.three-wood {
  display: grid;
  gap: 0.85rem;
}

.three-wood article {
  background: rgba(107, 58, 36, 0.28);
  border-top: 3px solid var(--copper);
  padding: 1rem 1.05rem;
}

.three-wood ul {
  margin: 0;
  padding-left: 1.1rem;
}

.copper-band {
  background: rgba(184, 115, 51, 0.1);
  border-block: 1px solid rgba(184, 115, 51, 0.35);
}

.bead-row {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.45rem;
  margin: 0 0 2rem;
  padding: 0;
}

.bead-row li {
  text-align: center;
  padding: 0.7rem 0.3rem;
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: 999px 999px 12px 12px;
  font-size: 0.85rem;
}

.bead-row li span {
  display: block;
  font-family: var(--mono);
  color: var(--oil);
  margin-bottom: 0.15rem;
}

.bead-row .hot {
  background: var(--oil);
  color: var(--wood);
  border-color: var(--oil);
}

.bead-row .hot span {
  color: var(--wood);
}

.still-leg {
  display: grid;
  gap: 1.1rem;
  margin-bottom: 2.1rem;
  align-items: center;
}

.still-leg figure {
  margin: 0;
}

.still-leg img {
  width: 100%;
  border: 6px solid var(--heart);
}

.still-leg figcaption {
  font-size: 0.84rem;
  color: var(--mute);
  padding-top: 0.35rem;
}

.idx {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--oil);
}

.dial {
  margin-top: 0.9rem;
  padding: 0.8rem;
  border: 1px dashed var(--oil);
  background: rgba(42, 24, 16, 0.55);
}

.dial-label {
  margin: 0 0 0.4rem;
  font-size: 0.85rem;
  color: var(--mute);
}

.slider {
  display: grid;
  grid-template-columns: 1.6rem 1fr 3.6rem;
  gap: 0.5rem;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.8rem;
}

.slider input {
  width: 100%;
  accent-color: var(--oil);
}

.tri-state {
  margin: 0.5rem 0 0;
  font-weight: 600;
}

.tri-state.ok {
  color: var(--ok);
}

.tri-state.warn {
  color: var(--oil);
}

.tri-state.late {
  color: var(--late);
}

.pot-board {
  display: grid;
  border: 1px solid var(--copper);
}

.pot-head,
.pot-row {
  display: grid;
  grid-template-columns: 0.9fr 0.9fr 0.7fr 0.8fr 0.9fr 1.3fr;
  gap: 0.35rem;
  padding: 0.55rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.82rem;
}

.pot-head {
  background: var(--copper);
  color: var(--wood);
}

.pot-row {
  border-top: 1px solid rgba(184, 115, 51, 0.35);
}

.pot-row.late {
  color: var(--late);
}

.pot-row.ok {
  color: var(--ok);
}

.rule-list {
  margin: 0;
  padding-left: 1.2rem;
}

.rule-list li {
  margin-bottom: 0.4rem;
}

.io {
  display: grid;
  gap: 1rem;
}

.io div {
  border: 1px solid var(--copper);
  padding: 1rem;
}

footer {
  position: relative;
  z-index: 2;
  padding: 1.3rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--mute);
  border-top: 2px solid var(--copper);
}

@media (min-width: 880px) {
  .hero-copy {
    padding: 2.2rem 2rem;
  }

  .three-wood {
    grid-template-columns: repeat(3, 1fr);
  }

  .still-leg {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .still-leg.rev {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .still-leg.rev > div {
    order: 2;
  }

  .io {
    grid-template-columns: 1fr 1fr;
  }

  .nav-toggle {
    display: none;
  }
}

@media (max-width: 879px) {
  .bead-row {
    grid-template-columns: 1fr 1fr;
  }

  .pot-head,
  .pot-row {
    grid-template-columns: 1fr 1fr;
  }

  .kettle-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--wood);
    border-bottom: 2px solid var(--copper);
    padding: 0.8rem 1.1rem 1rem;
    flex-direction: column;
  }

  .kettle-nav.open {
    display: flex;
  }

  .kettle-rail {
    flex-wrap: wrap;
  }
}