/* Кейс 04 — Тихие иконки. Музей интерфейсов: светлая стена, таблички, без яркого цвета */
:root {
  --wall: #ebeae5;
  --paper: #f7f6f2;
  --ink: #1d1d1b;
  --mute: #75736c;
  --line: rgba(29, 29, 27, .16);
  --sage: #66775a;
  --g: clamp(16px, 2.2vw, 32px);
  --sans: "Deledda", system-ui, sans-serif;
  --mono: "Feature Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--wall); color: var(--ink); font-family: var(--sans); font-weight: 300; overflow-x: hidden; overflow-x: clip; }
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; height: auto; }
::selection { background: var(--ink); color: var(--wall); }

.mono { font-family: var(--mono); font-size: 11px; font-weight: 400; letter-spacing: .2em; text-transform: uppercase; line-height: 1.7; }
.mono b { font-weight: 700; }

/* ---------- верхняя полоса ---------- */
.bar { position: fixed; inset: 0 0 auto 0; z-index: 50; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 14px var(--g); mix-blend-mode: difference; color: #fff; }
.bar nav { display: flex; gap: 24px; }
.bar a:hover { text-decoration: line-through; }

/* ---------- обложка ---------- */
.hero { min-height: 100vh; min-height: 100svh; padding: 64px var(--g) var(--g); display: grid; grid-template-columns: minmax(0, 1fr); align-content: space-between; gap: 4vh; }
.labels { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--ink); padding-top: 10px; }
.hero h1 { text-transform: uppercase; line-height: .8; letter-spacing: -.04em; }
.hero h1 span { display: block; }
.hero h1 .t1 { font-weight: 100; }
.hero h1 .t2 { font-weight: 900; }
.hero .sub { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; font-size: clamp(18px, 2vw, 32px); line-height: 1.15; }

/* линейка лет — как подпись под экспонатом */
.ruler { position: relative; height: 54px; border-top: 1px solid var(--ink); }
.ruler::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 10px;
  background: repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px calc(100% / 42)); }
.ruler span { position: absolute; top: 14px; transform: translateX(-50%); font-family: var(--mono); font-size: 11px; letter-spacing: .08em; }
.ruler span::before { content: ""; position: absolute; left: 50%; top: -14px; width: 1px; height: 14px; background: var(--ink); }
.ruler span:first-child { transform: none; }
.ruler span:first-child::before { left: 0; }
.ruler span:last-child { transform: translateX(-100%); }
.ruler span:last-child::before { left: 100%; }

.nums { list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.nums li { padding: 12px 12px 0 0; }
.nums b { display: block; font-family: var(--sans); font-weight: 100; font-size: clamp(48px, 7.4vw, 140px); line-height: .9; letter-spacing: -.04em; text-transform: none; }

/* ---------- паспорт и задача ---------- */
.brief { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 6vh var(--g); padding: 14vh var(--g) 6vh; }
.passport { display: grid; gap: 12px; align-content: start; }
.passport p { border-top: 1px solid var(--line); padding-top: 8px; display: grid; grid-template-columns: 9em minmax(0, 1fr); gap: 12px; }
.passport p span:first-child { color: var(--mute); }
.tsr { display: grid; gap: 5vh; }
.tsr h2 { font-family: var(--mono); font-weight: 700; font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--sage); margin-bottom: 10px; }
.tsr p { font-size: clamp(20px, 2.1vw, 34px); line-height: 1.22; max-width: 34ch; }
.tsr b { font-weight: 600; }

/* ---------- залы ---------- */
.hall { padding: 16vh var(--g) 4vh; display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; }
.hall h2 { font-weight: 100; text-transform: uppercase; line-height: .82; letter-spacing: -.04em; }
.hall h2 b { font-weight: 900; }
.hall .row { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; border-top: 1px solid var(--ink); padding-top: 10px; }
.hall .row .q { font-weight: 300; font-size: clamp(20px, 2.4vw, 40px); line-height: 1.1; max-width: 30ch; }

/* табличка под экспонатом */
.plate { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 10px; margin-top: 10px; border-top: 1px solid var(--line); }
figure { position: relative; cursor: zoom-in; }
figure img { background: var(--paper); }
.exhibit { padding: 0 var(--g); display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--g); }
.frame, .strip { min-width: 0; }
.frame { background: var(--paper); padding: clamp(10px, 1.6vw, 24px); box-shadow: 0 18px 40px -28px rgba(0, 0, 0, .45); }

/* лента, которая листается вбок */
.strip { overflow-x: auto; overscroll-behavior-x: contain; scrollbar-width: thin; padding-bottom: 8px; }
.strip img { width: auto; height: clamp(220px, 30vw, 380px); max-width: none; }

/* события таймлайна */
.events { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 var(--g); padding: 4vh var(--g) 0; }
.events li { border-top: 1px solid var(--ink); padding: 14px 0 26px; display: grid; gap: 6px; align-content: start; }
.events b { font-weight: 100; font-size: clamp(44px, 5vw, 96px); line-height: .85; letter-spacing: -.04em; }
.events h3 { font-weight: 600; font-size: clamp(17px, 1.4vw, 22px); line-height: 1.15; }
.events p { font-size: clamp(15px, 1.15vw, 18px); line-height: 1.4; color: var(--mute); }

/* шесть этапов */
.stages { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6vh var(--g); padding: 0 var(--g); counter-reset: st; }
.stages figure { counter-increment: st; }
.stages .plate b::before { content: "0" counter(st) " "; color: var(--sage); }
.stages .plate p { flex-basis: 100%; font-family: var(--sans); font-size: 15px; line-height: 1.4; letter-spacing: 0; text-transform: none; color: var(--mute); }

/* 27 стилей */
.tax { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4vh var(--g); padding: 4vh var(--g) 0; }
.tax div { border-top: 1px solid var(--ink); padding-top: 12px; }
.tax h3 { font-weight: 900; font-size: clamp(18px, 1.6vw, 26px); line-height: 1; margin-bottom: 12px; }
.tax h3 small { font-family: var(--mono); font-weight: 400; font-size: 11px; letter-spacing: .1em; color: var(--sage); margin-left: 6px; }
.tax ul { list-style: none; display: grid; gap: 4px; }
.tax li { font-size: clamp(15px, 1.15vw, 18px); line-height: 1.3; }

/* генеалогия */
.roots { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 4vh var(--g); padding: 4vh var(--g) 0; align-items: start; }
.roots h3 { font-family: var(--mono); font-weight: 700; font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--sage); margin-bottom: 14px; }
.pre { list-style: none; display: grid; gap: 10px; }
.pre li { font-size: 15px; line-height: 1.35; border-top: 1px solid var(--line); padding-top: 8px; }
.pre b { font-weight: 600; }
.formula { list-style: none; display: grid; gap: 0; }
.formula li { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: 4px var(--g); border-top: 1px solid var(--line); padding: 12px 0; }
.formula b { font-weight: 600; font-size: clamp(17px, 1.4vw, 22px); line-height: 1.15; }
.formula b small { display: block; font-family: var(--mono); font-weight: 400; font-size: 11px; letter-spacing: .1em; color: var(--mute); margin-top: 4px; }
.formula span { font-size: clamp(17px, 1.4vw, 22px); line-height: 1.15; }
.formula span::before { content: "← "; color: var(--sage); }
.formula p { grid-column: 2; font-size: 15px; line-height: 1.4; color: var(--mute); }

/* аффордансы */
.quote { padding: 18vh var(--g) 6vh; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 4vh var(--g); align-items: end; }
.quote q { quotes: none; font-weight: 100; font-size: clamp(36px, 5.6vw, 110px); line-height: .92; letter-spacing: -.035em; grid-column: 1 / -1; }
.quote q b { font-weight: 900; }
.quote p { grid-column: 2; font-size: clamp(17px, 1.5vw, 24px); line-height: 1.35; max-width: 44ch; }

/* разбор референса */
.ref { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: var(--g); padding: 0 var(--g); align-items: start; }
.ref .txt { display: grid; gap: 3vh; align-content: start; position: sticky; top: 80px; }
.ref .txt p { font-size: clamp(18px, 1.6vw, 26px); line-height: 1.3; }
.ref .txt p.mono { font-size: 11px; line-height: 1.7; color: var(--mute); }
.ref .txt .formula-big { font-weight: 900; font-size: clamp(26px, 3vw, 54px); line-height: .95; text-transform: uppercase; letter-spacing: -.03em; }
.ref .txt .formula-big i { font-style: normal; font-weight: 100; color: var(--sage); }
.refs { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--g); padding: 6vh var(--g) 0; align-items: end; }
.refs .plate { font-size: 10px; }

/* цифры */
.scale { padding: 18vh var(--g) 6vh; display: grid; gap: 6vh; }
.scale h2 { font-family: var(--mono); font-weight: 700; font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--sage); }
.scale ul { list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.scale li { padding: 14px 14px 0 0; display: grid; gap: 8px; align-content: start; }
.scale li b { font-weight: 100; font-size: clamp(52px, 7.6vw, 144px); line-height: .85; letter-spacing: -.05em; }
.scale li > span { font-family: var(--mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--mute); }

.self { padding: 10vh var(--g) 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: var(--g); }
.self p:last-child { font-size: clamp(22px, 2.6vw, 44px); line-height: 1.15; font-weight: 300; }

/* ---------- подвал ---------- */
footer { padding: 22vh var(--g) var(--g); display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; }
.next { display: grid; gap: 8px; border-top: 1px solid var(--ink); padding-top: 10px; }
.next .big { font-weight: 900; font-size: clamp(56px, 13vw, 260px); line-height: .82; letter-spacing: -.05em; text-transform: uppercase; transition: color .3s; }
.next:hover .big { color: var(--sage); }
footer .links { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; border-top: 1px solid var(--ink); padding-top: 10px; }
footer .links a { font-weight: 900; font-size: clamp(20px, 3vw, 48px); line-height: 1; text-transform: uppercase; letter-spacing: -.02em; }
footer .links a:hover { color: var(--sage); }

/* ---------- лайтбокс ---------- */
.lb { position: fixed; inset: 0; z-index: 100; background: rgba(235, 234, 229, .97); display: none; place-items: center; padding: 48px var(--g); cursor: zoom-out; }
.lb.on { display: grid; }
.lb img { max-width: 100%; max-height: calc(100svh - 96px); width: auto; object-fit: contain; }
.lb .mono { position: absolute; top: 14px; left: var(--g); right: var(--g); display: flex; justify-content: space-between; gap: 16px; }
.lb button { position: absolute; top: 50%; transform: translateY(-50%); background: none; border: 0; color: var(--ink); font: 100 44px var(--sans); padding: 16px; cursor: pointer; }
.lb [data-step="-1"] { left: 0; }
.lb [data-step="1"] { right: 0; }

/* ---------- планшет и телефон ---------- */
@media (max-width: 1100px) {
  .stages { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tax { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .refs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .bar nav, .bar > span { display: none; }
  .nums, .scale ul { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); row-gap: 24px; }
  .ruler span:nth-child(even) { display: none; }
  .brief, .roots, .ref, .self, .quote { grid-template-columns: minmax(0, 1fr); }
  .quote p { grid-column: 1; }
  .ref .txt { position: static; }
  .passport p { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .events { grid-template-columns: minmax(0, 1fr); }
  .stages { grid-template-columns: minmax(0, 1fr); }
  .tax { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .formula li { grid-template-columns: minmax(0, 1fr); }
  .formula p { grid-column: 1; }
  .refs { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .lb button { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* ===== Зал 04 в стиле Глеба: Frutiger Aero / Vectordelia, глянцевые плитки ===== */
.roots2 { position: relative; margin: 4vh var(--g) 0; padding: clamp(20px, 4vw, 56px); border-radius: 28px; overflow: hidden; isolation: isolate;
  background: linear-gradient(180deg, #e9f8ff 0%, #f4fbff 45%, #eefbe4 100%); box-shadow: inset 0 1px 0 #fff, 0 30px 60px -40px rgba(20, 80, 120, .5); }
.roots2::before, .roots2::after { content: ""; position: absolute; z-index: -1; border-radius: 50%; pointer-events: none;
  background: repeating-radial-gradient(circle, transparent 0 14px, rgba(72, 200, 255, .22) 14px 18px); }
.roots2::before { width: 520px; height: 520px; right: -160px; top: -180px; }
.roots2::after { width: 420px; height: 420px; left: -150px; bottom: -160px; background: repeating-radial-gradient(circle, transparent 0 12px, rgba(150, 230, 60, .25) 12px 16px); }
.r-k { color: #2b6d8f; margin: 0 0 18px; }
.r-k + .eq { margin-top: 0; }

.tile { --c1: #8ee6ff; --c2: #1b8fe0; position: relative; flex: none; display: grid; place-items: center; width: 76px; aspect-ratio: 1; border-radius: 23%;
  background: linear-gradient(160deg, var(--c1), var(--c2)); color: #fff;
  box-shadow: inset 0 -6px 12px rgba(0, 0, 0, .18), inset 0 2px 1px rgba(255, 255, 255, .7), 0 8px 16px -8px rgba(0, 40, 80, .55); overflow: hidden; }
.tile::before { content: ""; position: absolute; left: 6%; right: 6%; top: 4%; height: 46%; border-radius: 40% 40% 50% 50% / 30% 30% 70% 70%;
  background: linear-gradient(180deg, rgba(255, 255, 255, .85), rgba(255, 255, 255, .08)); }
.tile svg { position: relative; width: 62%; height: 62%; filter: drop-shadow(0 1px 1px rgba(0, 0, 0, .25)); }
.tile.s { width: 44px; } .tile.l { width: 92px; }
.lime { --c1: #e3ff7a; --c2: #3fae2a; } .red { --c1: #ff8a7a; --c2: #d4121c; } .gold { --c1: #ffe9a3; --c2: #c98a12; }
.purple { --c1: #d9a8ff; --c2: #6b2bd9; } .chrome { --c1: #ffffff; --c2: #8a96a6; color: #2b3440; } .paper { --c1: #ffffff; --c2: #e6e0d2; color: #1d1d1b; }
.ink { --c1: #5a5f6b; --c2: #111318; } .cyan { --c1: #b5f5ff; --c2: #10a7d6; } .blue { --c1: #8fc2ff; --c2: #1c4fe0; }
.pink { --c1: #ffc2ef; --c2: #e0279e; } .orange { --c1: #ffd38a; --c2: #ff6a00; }

/* традиции: витрина иконок */
.trad { list-style: none; display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 26px 14px; margin-bottom: 7vh; }
.trad li { position: relative; display: grid; justify-items: center; text-align: center; gap: 6px; outline: none; cursor: help; }
.trad li b { font-weight: 600; font-size: 14px; line-height: 1.1; }
.trad li .mono { font-size: 10px; letter-spacing: .1em; color: #5f7d8c; }
.trad li .tile { transition: transform .25s cubic-bezier(.3, 1.6, .5, 1); }
.trad li:hover .tile, .trad li:focus .tile { transform: translateY(-6px) scale(1.08); }

/* пояснение — всплывающий «пузырь» */
.trad p, .eq p { position: absolute; z-index: 5; left: 50%; bottom: calc(100% + 8px); width: max-content; max-width: 230px; transform: translate(-50%, 6px);
  padding: 10px 12px; border-radius: 14px; background: rgba(255, 255, 255, .92); backdrop-filter: blur(8px);
  box-shadow: 0 10px 24px -10px rgba(0, 40, 80, .5), inset 0 1px 0 #fff; font-size: 13px; line-height: 1.35; color: #1d2a33;
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; }
.trad li:hover p, .trad li:focus p, .eq li:hover p, .eq li:focus p { opacity: 1; transform: translate(-50%, 0); }

/* формулы */
.eq { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.eq li { position: relative; display: grid; gap: 6px; align-content: start; padding: 16px; border-radius: 20px; outline: none; cursor: help;
  background: rgba(255, 255, 255, .7); box-shadow: inset 0 1px 0 #fff, 0 10px 24px -18px rgba(0, 40, 80, .6); transition: background .2s, transform .2s; }
.eq li:hover, .eq li:focus { background: #fff; transform: translateY(-3px); }
.eq .row { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.eq .par { display: grid; justify-items: center; gap: 4px; width: 50px; }
.eq .par small { font-family: var(--mono); font-size: 8px; letter-spacing: .04em; text-transform: uppercase; color: #5f7d8c; text-align: center; line-height: 1.2; }
.eq i { font-style: normal; font-weight: 900; font-size: 24px; line-height: 1; color: #2b9fd8; align-self: flex-start; margin-top: 11px; }
.eq .row > i:last-of-type { color: #3fae2a; margin-left: auto; margin-top: 30px; }

.eq b { font-weight: 900; font-size: clamp(17px, 1.4vw, 22px); line-height: 1.05; }
.eq .mono { font-size: 10px; letter-spacing: .1em; color: #5f7d8c; }
.eq p { bottom: auto; top: 12px; }

@media (max-width: 1100px) { .trad { grid-template-columns: repeat(5, minmax(0, 1fr)); } .eq { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 760px) {
  .roots2 { margin: 3vh 10px 0; padding: 18px 12px; border-radius: 20px; }
  .trad { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px 8px; }
  .tile { width: 64px; } .tile.l { width: 72px; } .tile.s { width: 38px; }
  .eq { grid-template-columns: minmax(0, 1fr); }
  .eq .par { width: 44px; }
  .trad p { max-width: 180px; }
  .trad li:nth-child(3n+1) p { left: 0; transform: translate(0, 6px); }
  .trad li:nth-child(3n+1):hover p, .trad li:nth-child(3n+1):focus p { transform: translate(0, 0); }
  .trad li:nth-child(3n) p { left: auto; right: 0; transform: translate(0, 6px); }
  .trad li:nth-child(3n):hover p, .trad li:nth-child(3n):focus p { transform: translate(0, 0); }
}