:root {
  --paper: #f7f3ea;
  --ink: #222222;
  --muted: #6b6256;
  --line: #d8cfbf;
  --card: #fffdf8;
  --accent: #9f5d2a;
  --accent-dark: #5a351c;
  --shadow: 0 24px 60px rgba(46, 35, 22, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  background: radial-gradient(circle at top left, #fffaf0 0, var(--paper) 42%, #efe7d8 100%);
  color: var(--ink);
  line-height: 1.56;
}

.site-shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 64px;
}

.hero {
  border-bottom: 1px solid var(--line);
  padding-bottom: 28px;
  margin-bottom: 30px;
}

.kicker,
.label {
  margin: 0 0 10px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  line-height: 0.94;
  letter-spacing: -0.055em;
  font-weight: 500;
}

.standfirst {
  max-width: 780px;
  margin: 22px 0 24px;
  font-size: clamp(1.05rem, 2vw, 1.32rem);
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tab {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.45);
  color: var(--accent-dark);
  padding: 10px 16px;
  border-radius: 999px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.92rem;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.tab:hover { transform: translateY(-1px); }
.tab.active {
  background: var(--accent-dark);
  color: #fff8ed;
  border-color: var(--accent-dark);
}

.page { display: none; }
.page.active { display: block; }

.card {
  background: color-mix(in srgb, var(--card) 92%, white 8%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 22px;
  padding: clamp(24px, 5vw, 58px);
}

.card h2 {
  margin: 0 0 22px;
  font-size: clamp(1.7rem, 4vw, 3.2rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 500;
}

.card p {
  max-width: 780px;
  font-size: clamp(1.02rem, 1.55vw, 1.18rem);
  margin: 0 0 18px;
}

.intro {
  border-left: 3px solid var(--accent);
  padding-left: 18px;
  color: var(--muted);
}

.flow {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.flow-step {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.48);
  padding: 22px;
}

.step-number {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  color: var(--accent-dark);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
}

.flow-step h3 {
  margin: 0 0 8px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1.04rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

.flow-step p { margin-bottom: 0; }

.flow-arrow {
  color: var(--accent-dark);
  font-size: 1.4rem;
  line-height: 1;
  text-align: center;
}

.method-step {
  background: linear-gradient(180deg, rgba(255,255,255,0.70), rgba(255,250,239,0.56));
}

.result-step {
  border-color: color-mix(in srgb, var(--accent) 62%, var(--line) 38%);
}

.slide-figure {
  margin: 20px 0 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
}

.slide-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.slide-figure figcaption {
  padding: 10px 14px 12px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.84rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.article p { max-width: 760px; }

.article p:first-of-type {
  font-size: clamp(1.12rem, 1.8vw, 1.34rem);
  line-height: 1.48;
}

@media (max-width: 640px) {
  .site-shell { width: min(100% - 22px, 1080px); padding-top: 26px; }
  .card { border-radius: 16px; }
  .tab { width: 100%; }
  .flow-step { grid-template-columns: 1fr; padding: 18px; }
}