/* Prorvema — stone-courses */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: #f1f2f0;
  color: #171917;
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
}

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

a { color: #2a6b3c; text-decoration: underline; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

a:focus-visible,
:focus-visible {
  outline: 2px solid #2a6b3c;
  outline-offset: 3px;
}

/* ---------- grid ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 24px;
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
}

.sec { padding: 88px 52px; }
.sec .block { grid-column: var(--cs, 1) / span 6; }

.step-0 { --cs: 1; }
.step-1 { --cs: 2; }
.step-2 { --cs: 3; }
.step-3 { --cs: 4; }

.tone-a { background: #f1f2f0; }
.tone-b { background: #e3e5e2; }
.tone-dark { background: #141614; color: #f1f2f0; }
.tone-dark a { color: #f1f2f0; }

/* ---------- typography ---------- */

h1, h2, h3,
.mono {
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  text-transform: uppercase;
  font-weight: 600;
}

h1 {
  margin: 0;
  font-size: clamp(27px, 4.1vw, 49px);
  line-height: 1.14;
  letter-spacing: 0.02em;
}

h2 {
  margin: 0 0 22px;
  font-size: clamp(18px, 1.9vw, 24px);
  line-height: 1.34;
  letter-spacing: 0.07em;
}

h3 {
  margin: 34px 0 10px;
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: 0.13em;
}

p { margin: 0 0 20px; }
p:last-child { margin-bottom: 0; }

.num {
  display: block;
  margin-bottom: 14px;
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: #8a6a20;
}

.lead { font-size: 19px; line-height: 1.7; }
.muted { color: #6a6e6a; }
.tone-dark .muted { color: #b4bab4; }

/* ---------- lists ---------- */

.list { list-style: none; margin: 22px 0 0; padding: 0; }
.list li { position: relative; padding-left: 26px; margin-bottom: 11px; }
.list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 13px;
  height: 2px;
  background: #2a6b3c;
}
.tone-dark .list li::before { background: #8a6a20; }

.topics {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 24px;
}
.topics li {
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #171917;
  padding: 9px 0 9px 26px;
  position: relative;
  line-height: 1.5;
}
.topics li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 13px;
  height: 2px;
  background: #8a6a20;
}

/* ---------- hero ---------- */

.hero-nav { background: #e3e5e2; padding: 16px 52px; }

.nav-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 32px;
}

.brand {
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-size: 15px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: #171917;
  text-decoration: none;
}
.brand:hover { color: #2a6b3c; }

.nav-inner nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin: 0;
  padding: 0;
}
.nav-inner nav a {
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #171917;
  text-decoration: none;
  padding: 4px 0;
  display: inline-block;
}
.nav-inner nav a:hover { color: #2a6b3c; }
.nav-inner nav a[aria-current="page"] {
  color: #2a6b3c;
  border-bottom: 2px solid #2a6b3c;
}

.hero-main {
  background: #f1f2f0;
  padding: 108px 52px 48px;
  display: flex;
  align-items: flex-end;
}
.hero-main .grid > div { grid-column: 1 / span 10; }
.hero-kicker {
  display: block;
  margin-bottom: 26px;
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #8a6a20;
}

.hero-intro { background: #dcdfdb; padding: 56px 52px 64px; }
.hero-intro .block { grid-column: 1 / span 6; }
.hero-intro .topics-wrap { grid-column: 8 / span 5; }
.topics-title {
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #6a6e6a;
  margin: 0;
}

/* ---------- figures ---------- */

.fig-band { padding: 72px 52px; }
.fig-band figure { grid-column: 4 / span 9; margin: 0; }
figcaption {
  margin-top: 16px;
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: #6a6e6a;
  max-width: 46ch;
}
.tone-dark figcaption { color: #9aa09a; }

.split figure { grid-column: 1 / span 5; margin: 0; }
.split .block { grid-column: 7 / span 6; }

/* ---------- footer ---------- */

.site-footer {
  background: #141614;
  color: #f1f2f0;
  padding: 64px 52px 56px;
}
.footer-inner { max-width: 1240px; margin: 0 auto; }

.f-name {
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-weight: 600;
  text-transform: uppercase;
  font-size: clamp(38px, 11vw, 132px);
  line-height: 0.95;
  letter-spacing: 0.01em;
  margin: 0 0 54px;
}

.f-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 36px 40px;
}
.f-col::before {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  background: #8a6a20;
  margin-bottom: 18px;
}
.f-col h2,
.f-col p.f-title {
  font-family: ui-monospace, Consolas, "Liberation Mono", monospace;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #9aa09a;
  margin: 0 0 14px;
  font-weight: 600;
}
.f-col ul { list-style: none; margin: 0; padding: 0; }
.f-col li { margin-bottom: 8px; }
.f-col a { color: #f1f2f0; text-decoration: none; border-bottom: 1px solid #4a4f4a; }
.f-col a:hover { border-bottom-color: #f1f2f0; }
.f-col p { font-size: 15px; line-height: 1.7; color: #c6cbc6; }

/* ---------- responsive ---------- */

@media (max-width: 1080px) {
  .sec { padding: 72px 40px; }
  .hero-nav { padding: 16px 40px; }
  .hero-main { padding: 84px 40px 40px; }
  .hero-intro { padding: 48px 40px 56px; }
  .fig-band { padding: 60px 40px; }
  .site-footer { padding: 56px 40px 48px; }
  .sec .block { grid-column: var(--cs, 1) / span 8; }
  .fig-band figure { grid-column: 3 / span 10; }
  .hero-intro .block { grid-column: 1 / span 7; }
  .hero-intro .topics-wrap { grid-column: 9 / span 4; }
  .split figure { grid-column: 1 / span 5; }
  .split .block { grid-column: 7 / span 6; }
}

@media (max-width: 820px) {
  body { font-size: 16.5px; }
  .grid { display: block; }
  .sec { padding: 52px 24px; }
  .sec .block,
  .fig-band figure,
  .split figure,
  .split .block,
  .hero-intro .block,
  .hero-intro .topics-wrap,
  .hero-main .grid > div { grid-column: auto; }
  .hero-nav { padding: 14px 24px; }
  .hero-main { padding: 56px 24px 34px; }
  .hero-intro { padding: 40px 24px 48px; }
  .fig-band { padding: 40px 24px; }
  .split figure { margin-bottom: 32px; }
  .hero-intro .topics-wrap { margin-top: 34px; }
  .topics { grid-template-columns: minmax(0, 1fr); }
  .lead { font-size: 17.5px; }
  .site-footer { padding: 48px 24px 40px; }
  .f-name { margin-bottom: 40px; }
  .f-cols { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .nav-inner { align-items: flex-start; }
}