/* aqueduct — известняк, тень арки, жёлоб воды через страницу */

:root {
  --aqd-stone: #ded8cc;
  --aqd-stone-lit: #ece7dd;
  --aqd-shadow: #4a4438;
  --aqd-water: #3d7fa8;
  --aqd-water-pale: rgba(61, 127, 168, .16);
  --aqd-mortar: rgba(74, 68, 56, .22);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    repeating-linear-gradient(0deg, transparent 0 63px, var(--aqd-mortar) 63px 64px),
    repeating-linear-gradient(90deg, transparent 0 119px, rgba(74, 68, 56, .12) 119px 120px),
    var(--aqd-stone);
  color: var(--aqd-shadow);
  font-family: 'Brygada 1918', Georgia, serif;
  font-size: 17.5px;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}

.aqd-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px 64px;
  background: linear-gradient(180deg, rgba(236, 231, 221, .78), rgba(236, 231, 221, .52));
  border-left: 1px solid var(--aqd-mortar);
  border-right: 1px solid var(--aqd-mortar);
}

/* ---------- ряд арок в шапке ---------- */

.aqd-arcade {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 84px;
  margin: 0 0 6px;
  border-bottom: 5px solid var(--aqd-shadow);
}

.aqd-arcade i {
  flex: 1;
  display: block;
  height: 100%;
  border: 3px solid var(--aqd-shadow);
  border-bottom: 0;
  border-radius: 50% 50% 0 0 / 74% 74% 0 0;
  background: linear-gradient(180deg, rgba(61, 127, 168, .10), transparent 62%);
}

.aqd-arcade i:nth-child(even) { height: 78%; opacity: .74; }

.aqd-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 20px;
  padding: 12px 0 18px;
  border-bottom: 1px solid var(--aqd-mortar);
}

.aqd-sign {
  font-family: 'Playfair Display SC', Georgia, serif;
  font-size: 26px;
  letter-spacing: .02em;
  color: var(--aqd-shadow);
}

.aqd-sign span { color: var(--aqd-water); }

.aqd-head-meta { font-size: 14px; color: rgba(74, 68, 56, .78); align-self: center; }

/* ---------- жёлоб ---------- */

.aqd-channel {
  height: 12px;
  margin: 30px 0;
  border-top: 2px solid var(--aqd-shadow);
  border-bottom: 2px solid var(--aqd-shadow);
  background: repeating-linear-gradient(115deg,
    var(--aqd-water) 0 14px, rgba(61, 127, 168, .42) 14px 30px);
  opacity: .85;
}

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

.aqd-hero { padding: 30px 0 8px; }

.aqd-hero h1 {
  font-family: 'Playfair Display SC', Georgia, serif;
  font-weight: 400;
  font-size: 38px;
  line-height: 1.24;
  margin: 0 0 14px;
  max-width: 24ch;
}

.aqd-hero h1 em { font-style: normal; color: var(--aqd-water); }

.aqd-intro {
  font-size: 19px;
  max-width: 68ch;
  margin: 0 0 24px;
  padding-left: 18px;
  border-left: 4px solid var(--aqd-water);
}

/* ---------- KPI: шесть пролётов, из них пять заполнены ---------- */

.aqd-gauge {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border: 3px solid var(--aqd-shadow);
  margin: 26px 0 24px;
  background: var(--aqd-stone-lit);
}

.aqd-gauge > div {
  padding: 18px 12px 16px;
  border-right: 1px solid var(--aqd-mortar);
  text-align: center;
  position: relative;
}

.aqd-gauge > div:last-child { border-right: 0; }

.aqd-gauge > div::before {
  content: "";
  position: absolute;
  inset: 6px 8px auto 8px;
  height: 22px;
  border: 2px solid var(--aqd-water-pale);
  border-bottom: 0;
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
}

.aqd-gauge dt {
  font-family: 'Playfair Display SC', Georgia, serif;
  font-size: 25px;
  color: var(--aqd-water);
  margin: 12px 0 4px;
}

.aqd-gauge dd {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: rgba(74, 68, 56, .72);
}

/* ---------- CTA ---------- */

.aqd-go {
  display: inline-block;
  font-family: 'Playfair Display SC', Georgia, serif;
  font-size: 18px;
  text-decoration: none;
  color: var(--aqd-stone-lit);
  background: var(--aqd-water);
  padding: 13px 30px;
  border-radius: 26px 26px 4px 4px;
  border: 2px solid var(--aqd-shadow);
}

.aqd-go:hover { background: #2f6a8e; }

.aqd-go-line { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin: 22px 0; }
.aqd-go-note { font-size: 14.5px; color: rgba(74, 68, 56, .8); }

/* ---------- ярусы секций ---------- */

.aqd-tier {
  position: relative;
  background: var(--aqd-stone-lit);
  border: 1px solid var(--aqd-mortar);
  border-top: 4px solid var(--aqd-shadow);
  padding: 24px 28px 22px;
  margin: 0 0 30px;
}

.aqd-tier--upper { margin-left: 0; margin-right: 58px; }
.aqd-tier--lower { margin-left: 58px; margin-right: 0; border-top-color: var(--aqd-water); }

.aqd-tier::after {
  content: "";
  position: absolute;
  bottom: -30px;
  left: 42px;
  width: 2px;
  height: 30px;
  background: var(--aqd-mortar);
}

h2 {
  font-family: 'Playfair Display SC', Georgia, serif;
  font-weight: 400;
  font-size: 26px;
  line-height: 1.3;
  margin: 0 0 12px;
  color: var(--aqd-shadow);
}

h2::after {
  content: "";
  display: block;
  width: 96px;
  height: 3px;
  margin-top: 9px;
  background: var(--aqd-water);
}

h3 {
  font-family: 'Brygada 1918', Georgia, serif;
  font-weight: 700;
  font-size: 19px;
  margin: 22px 0 8px;
  color: var(--aqd-shadow);
}

h3::before { content: "⌒ "; color: var(--aqd-water); }

p { margin: 0 0 13px; }

.aqd-key { color: var(--aqd-water); font-weight: 700; }
.aqd-fig { font-variant-numeric: tabular-nums; }

ol.aqd-flow { margin: 0 0 16px; padding-left: 22px; }
ol.aqd-flow li { margin-bottom: 8px; }

ul.aqd-drops { list-style: none; margin: 0 0 16px; padding: 0; }

ul.aqd-drops li {
  padding-left: 24px;
  margin-bottom: 8px;
  background: radial-gradient(circle at 6px .85em, var(--aqd-water) 3.5px, transparent 4px);
}

/* ---------- таблицы ---------- */

.aqd-slide { overflow-x: auto; margin-bottom: 16px; }

table { width: 100%; min-width: 540px; border-collapse: collapse; font-size: 15.5px; }

caption {
  caption-side: bottom;
  text-align: left;
  padding-top: 8px;
  font-size: 13px;
  color: rgba(74, 68, 56, .72);
}

th {
  font-family: 'Playfair Display SC', Georgia, serif;
  font-weight: 400;
  font-size: 14.5px;
  text-align: left;
  padding: 10px 12px;
  background: var(--aqd-shadow);
  color: var(--aqd-stone-lit);
}

td { padding: 9px 12px; border-bottom: 1px solid var(--aqd-mortar); vertical-align: top; }
tbody tr:hover td { background: var(--aqd-water-pale); }

td.aqd-tight { white-space: nowrap; font-variant-numeric: tabular-nums; }

/* ---------- ступени клуба: шесть ярусов с уклоном ---------- */

.aqd-ladder { margin: 16px 0 18px; }

.aqd-rung {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 10px 14px;
  border-left: 5px solid var(--aqd-water);
  background: linear-gradient(90deg, var(--aqd-water-pale), transparent 62%);
  margin-bottom: 6px;
}

.aqd-rung:nth-child(1) { margin-left: 0; }
.aqd-rung:nth-child(2) { margin-left: 16px; }
.aqd-rung:nth-child(3) { margin-left: 32px; }
.aqd-rung:nth-child(4) { margin-left: 48px; }
.aqd-rung:nth-child(5) { margin-left: 64px; }
.aqd-rung:nth-child(6) { margin-left: 80px; }

.aqd-rung dfn {
  font-style: normal;
  font-family: 'Playfair Display SC', Georgia, serif;
  font-size: 18px;
  min-width: 128px;
}

.aqd-rung var { font-style: normal; color: var(--aqd-water); font-size: 20px; font-weight: 700; }
.aqd-rung small { font-size: 14px; color: rgba(74, 68, 56, .78); }

/* ---------- отзыв ---------- */

.aqd-quote {
  margin: 20px 0;
  padding: 18px 22px;
  background: var(--aqd-stone);
  border-top: 2px solid var(--aqd-water);
  border-bottom: 2px solid var(--aqd-water);
  font-size: 17px;
}

.aqd-quote cite { display: block; margin-top: 9px; font-style: normal; font-size: 14px; color: rgba(74, 68, 56, .76); }

/* ---------- FAQ ---------- */

details {
  background: var(--aqd-stone-lit);
  border-left: 3px solid var(--aqd-water);
  margin-bottom: 7px;
  padding: 11px 16px;
}

summary { cursor: pointer; font-weight: 700; font-size: 16.5px; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: " ⌄"; color: var(--aqd-water); }
details[open] summary::after { content: " ⌃"; }
details p { margin: 9px 0 3px; font-size: 16px; }

/* ---------- источники ---------- */

.aqd-ledger {
  border: 3px double var(--aqd-shadow);
  padding: 22px 26px;
  margin: 28px 0;
  font-size: 15.5px;
}

.aqd-ledger .aqd-ledger-title {
  font-family: 'Playfair Display SC', Georgia, serif;
  font-size: 23px;
  margin: 0 0 12px;
}

/* ---------- подвал ---------- */

.aqd-base {
  border-top: 5px solid var(--aqd-shadow);
  padding-top: 20px;
  font-size: 14.5px;
  color: rgba(74, 68, 56, .86);
}

.aqd-base p { margin: 0 0 8px; }

.aqd-warn {
  display: inline-block;
  padding: 7px 14px;
  background: var(--aqd-shadow);
  color: var(--aqd-stone-lit);
  letter-spacing: .02em;
}

/* ---------- узкий экран ---------- */

@media (max-width: 640px) {
  body { font-size: 16.5px; }
  .aqd-page { padding: 0 15px 44px; }
  .aqd-arcade { height: 52px; gap: 4px; }
  .aqd-arcade i:nth-child(n+6) { display: none; }
  .aqd-hero h1 { font-size: 27px; }
  .aqd-intro { font-size: 17px; }
  .aqd-gauge { grid-template-columns: repeat(2, 1fr); }
  .aqd-gauge > div:last-child { grid-column: 1 / -1; }
  .aqd-tier--upper, .aqd-tier--lower { margin-left: 0; margin-right: 0; padding: 18px 15px; }
  .aqd-tier::after { display: none; }
  h2 { font-size: 21px; }
  h3 { font-size: 17.5px; }
  .aqd-go { display: block; text-align: center; }
  .aqd-rung { flex-wrap: wrap; gap: 6px; }
  .aqd-rung:nth-child(n) { margin-left: 0; }
  .aqd-rung dfn { min-width: 0; }
  table { font-size: 14px; }
}