/* ============================================================
   alteralto.github.io — «Проектный лист, прочитанный инженером»
   Дизайн-система: альбом чертёжных листов на столе.
   Без webfonts: системная моноширинная + системный гротеск.
   ============================================================ */

/* ---------- 1. Токены ---------- */

:root {
  color-scheme: light dark;

  /* стол и бумага */
  --desk: #e5e0d0;
  --paper: #f7f4ea;
  --paper-2: #efebdc;

  /* графит */
  --ink: #1a1d1a;
  --muted: #59615a;
  --soft: #7d857c;

  /* линии */
  --line: #d1cab6;
  --line-strong: #8f8975;

  /* красное перо нормоконтроля */
  --accent: #ad3814;
  --accent-dim: #b2451e;

  /* штамп (футер) */
  --stamp-bg: #191c19;
  --stamp-fg: #efece1;
  --stamp-muted: #a3a898;
  --stamp-line: #3d423c;
  --stamp-accent: #ff6a3c;

  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --shell: 1280px;
  --gap-desk: clamp(1.75rem, 3.5vw, 3.25rem);
  --pad-x: clamp(1.1rem, 3.5vw, 2.75rem);
}

[data-theme="dark"] {
  color-scheme: dark;
  --desk: #0b0d0f;
  --paper: #15181b;
  --paper-2: #191d21;
  --ink: #e7e9e2;
  --muted: #9ba49b;
  --soft: #6f7870;
  --line: #2b3136;
  --line-strong: #65707a;
  --accent: #ff6a3c;
  --accent-dim: #d95a31;
  --stamp-bg: #08090b;
  --stamp-fg: #e3e6dd;
  --stamp-muted: #8d958b;
  --stamp-line: #2c3236;
  --stamp-accent: #ff6a3c;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --desk: #0b0d0f;
    --paper: #15181b;
    --paper-2: #191d21;
    --ink: #e7e9e2;
    --muted: #9ba49b;
    --soft: #6f7870;
    --line: #2b3136;
    --line-strong: #65707a;
    --accent: #ff6a3c;
    --accent-dim: #d95a31;
    --stamp-bg: #08090b;
    --stamp-fg: #e3e6dd;
    --stamp-muted: #8d958b;
    --stamp-line: #2c3236;
    --stamp-accent: #ff6a3c;
  }
}

[data-theme="light"] {
  color-scheme: light;
}

/* ---------- 2. База ---------- */

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

html {
  scroll-padding-top: 5.25rem;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--desk);
  color: var(--ink);
  font: 400 1rem/1.65 var(--sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--accent);
  color: var(--paper);
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.24em;
}

a:hover {
  color: var(--accent);
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

h1,
h2,
h3,
p,
dl,
figure {
  margin: 0;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

img,
svg {
  max-width: 100%;
  height: auto;
}

.shell {
  width: min(var(--shell), 100% - clamp(1rem, 4vw, 3rem));
  margin-inline: auto;
}

/* моно-метки */
.lbl {
  margin: 0;
  color: var(--accent);
  font: 700 0.66rem/1.5 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.lbl-mut {
  color: var(--muted);
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font: 700 0.72rem/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  transform: translateY(-260%);
}

.skip-link:focus {
  color: var(--paper);
  transform: translateY(0);
}

/* ---------- 3. Шапка ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line-strong);
  background: color-mix(in srgb, var(--desk) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem 2rem;
  min-height: 3.6rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  width: max-content;
  text-decoration: none;
}

.wordmark:hover {
  color: inherit;
}

.wordmark-mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font: 700 0.68rem/1 var(--mono);
  letter-spacing: 0.06em;
}

.wordmark:hover .wordmark-mark {
  background: var(--accent);
  border-color: var(--accent);
}

.wordmark-name {
  font: 700 0.72rem/1.2 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.wordmark-name small {
  display: block;
  color: var(--muted);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.main-nav {
  display: flex;
  justify-content: center;
  gap: clamp(1rem, 2.6vw, 2.1rem);
}

.main-nav a {
  padding-block: 0.3rem;
  background: linear-gradient(currentColor, currentColor) no-repeat left bottom / 0% 1px;
  font: 650 0.68rem/1 var(--mono);
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-size 0.25s ease, color 0.15s ease;
}

.main-nav a:hover {
  background-size: 100% 1px;
  color: var(--accent);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  justify-self: end;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  padding: 0;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle svg {
  display: block;
}

.language-switch {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--soft);
  font: 600 0.68rem/1 var(--mono);
}

.language-button {
  padding: 0.45rem 0.15rem;
  border: 0;
  background: linear-gradient(var(--accent), var(--accent)) no-repeat left bottom / 0% 1px;
  color: var(--muted);
  font: 650 0.68rem/1 var(--mono);
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-size 0.25s ease, color 0.15s ease;
}

.language-button:hover {
  color: var(--accent);
}

.language-button[aria-pressed="true"] {
  background-size: 100% 1px;
  color: var(--accent);
}

/* ---------- 4. Листы ---------- */

main {
  padding-block: var(--gap-desk);
}

.sheet {
  position: relative;
  width: min(var(--shell), 100% - clamp(1rem, 4vw, 3rem));
  margin-inline: auto;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.sheet + .sheet,
.desk-divider + .sheet,
.sheet + .desk-divider {
  margin-top: var(--gap-desk);
}

/* приводочные метки по углам листа */
.sheet::before,
.sheet::after {
  content: "";
  position: absolute;
  width: 11px;
  height: 11px;
  pointer-events: none;
}

.sheet::before {
  top: -7px;
  left: -7px;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.sheet::after {
  right: -7px;
  bottom: -7px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.sheet-tinted {
  background: var(--paper-2);
}

.sheet-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1.4rem;
  padding: 0.55rem var(--pad-x);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 600 0.62rem/1.5 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.sheet-no {
  padding: 0.3em 0.65em;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-weight: 700;
}

.sheet-head-right {
  margin-left: auto;
  text-align: right;
}

.sheet-body {
  padding: clamp(1.75rem, 4.5vw, 3.75rem) var(--pad-x) clamp(2rem, 5vw, 4.25rem);
}

/* заголовочный ряд листа */
.sheet-title-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.52fr);
  align-items: end;
  gap: 1.5rem 3.5rem;
  margin-bottom: clamp(2.25rem, 5vw, 4rem);
}

.sheet-title {
  font: 700 clamp(1.9rem, 4.6vw, 4rem)/0.98 var(--mono);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.sheet-title-row .lbl {
  margin-bottom: 1rem;
}

.sheet-intro {
  max-width: 46ch;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.98rem;
}

.sheet-intro p {
  margin: 0;
}

/* заголовок-разделитель на столе (architecture.html) */
.desk-divider {
  width: min(var(--shell), 100% - clamp(1rem, 4vw, 3rem));
  margin: var(--gap-desk) auto 0;
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  color: var(--muted);
}

.desk-divider h2 {
  flex: 0 0 auto;
  font: 700 0.78rem/1.4 var(--mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
}

.desk-divider .divider-rule {
  flex: 1 1 auto;
  border-top: 1px solid var(--line-strong);
  transform: translateY(-0.2em);
}

.desk-divider p {
  flex: 0 1 auto;
  max-width: 52ch;
  font: 500 0.72rem/1.6 var(--mono);
  letter-spacing: 0.04em;
}

/* ---------- 5. Титульный лист (hero) ---------- */

.hero-body {
  position: relative;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: clamp(2.5rem, 5vw, 4rem);
  overflow: hidden;
}

@media (min-width: 981px) {
  .hero-body {
    min-height: min(46rem, calc(100svh - 12rem));
  }
}

/* миллиметровка */
.hero-body::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--line) 55%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--line) 55%, transparent) 1px, transparent 1px),
    linear-gradient(to right, color-mix(in srgb, var(--line) 32%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--line) 32%, transparent) 1px, transparent 1px);
  background-size: 60px 60px, 60px 60px, 12px 12px, 12px 12px;
  mask-image: radial-gradient(120% 90% at 78% 0%, #000 0%, transparent 62%);
  -webkit-mask-image: radial-gradient(120% 90% at 78% 0%, #000 0%, transparent 62%);
  pointer-events: none;
}

.hero-body > * {
  position: relative;
  z-index: 1;
}

.hero-main {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.65fr);
  align-items: end;
  gap: clamp(2.5rem, 6vw, 6rem);
}

.hero-copy .lbl {
  margin-bottom: 1.4rem;
}

h1 {
  font: 700 clamp(2.65rem, 8.8vw, 8rem)/0.95 var(--mono);
  letter-spacing: -0.015em;
  text-transform: uppercase;
}

h1 [data-lang-content] {
  display: contents;
}

h1 .l {
  display: block;
}

h1 .l + .l {
  color: color-mix(in srgb, var(--ink) 88%, var(--accent));
}

/* размерная линия под ролью */
.dim {
  display: inline-flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1.6rem 0 2rem;
  min-width: min(30rem, 100%);
}

.dim-label {
  color: var(--ink);
  font: 650 clamp(0.74rem, 1.6vw, 0.92rem)/1.5 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.dim-rule {
  position: relative;
  height: 9px;
  border-inline: 1px solid var(--line-strong);
}

.dim-rule::before {
  content: "";
  position: absolute;
  top: 4px;
  right: 0;
  left: 0;
  border-top: 1px solid var(--line-strong);
}

.hero-positioning {
  max-width: 58ch;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.16rem);
}

.hero-positioning p {
  margin: 0 0 0.35rem;
}

/* контакты-спецификация */
.contact-list {
  display: grid;
  gap: 0.1rem;
  max-width: 34rem;
  margin-top: 2.2rem;
  padding: 0;
}

.contact-link {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.5rem 0.1rem;
  text-decoration: none;
  font: 500 0.82rem/1.4 var(--mono);
}

.contact-key {
  flex: 0 0 3.4rem;
  color: var(--accent);
  font: 700 0.64rem/1.6 var(--mono);
  letter-spacing: 0.14em;
}

.contact-dots {
  flex: 1 1 auto;
  border-bottom: 1px dotted var(--line-strong);
  transform: translateY(-0.28em);
}

.contact-value {
  overflow-wrap: anywhere;
}

.contact-link:hover .contact-value {
  color: var(--accent);
}

.contact-link:hover .contact-dots {
  border-color: var(--accent);
}

/* экспликация */
.explication {
  border: 1px solid var(--line-strong);
  background: color-mix(in srgb, var(--paper) 72%, transparent);
}

.explication-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 650 0.62rem/1.5 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.status-square {
  flex: 0 0 auto;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--accent);
}

.explication dl {
  margin: 0;
  padding: 0.35rem 1rem 0.55rem;
}

.explication dl div {
  display: grid;
  grid-template-columns: 4.6rem 1fr;
  gap: 1rem;
  padding-block: 0.62rem;
}

.explication dl div + div {
  border-top: 1px solid var(--line);
}

.explication dt,
.explication dd {
  margin: 0;
  font: 600 0.68rem/1.55 var(--mono);
  letter-spacing: 0.06em;
}

.explication dt {
  color: var(--accent);
  text-transform: uppercase;
}

.explication dd {
  color: var(--ink);
}

/* нижняя строка титульного листа */
.hero-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 600 0.62rem/1.5 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.scalebar {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.scalebar-cells {
  display: inline-flex;
  height: 7px;
  border: 1px solid var(--line-strong);
}

.scalebar-cells span {
  width: 22px;
}

.scalebar-cells span:nth-child(odd) {
  background: var(--line-strong);
}

/* ---------- 6. Проекты ---------- */

.project-featured {
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.feat-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 0.75rem 2rem;
  padding: 1.4rem clamp(1.1rem, 3vw, 2.25rem) 1.3rem;
  border-bottom: 1px solid var(--line);
}

.feat-head .lbl {
  margin-bottom: 0.75rem;
}

.feat-head h3 {
  font: 700 clamp(1.7rem, 3.4vw, 2.7rem)/1 var(--mono);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.project-meta {
  color: var(--muted);
  font: 600 0.66rem/1.6 var(--mono);
  letter-spacing: 0.08em;
  text-align: right;
  text-transform: uppercase;
}

.feat-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.98fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  padding: clamp(1.5rem, 3.5vw, 2.5rem) clamp(1.1rem, 3vw, 2.25rem);
}

.project-summary {
  max-width: 56ch;
  font-size: clamp(1.06rem, 1.8vw, 1.24rem);
  line-height: 1.55;
}

.spec-list {
  display: grid;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: spec;
}

.spec-list li {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: 0.9rem;
  padding-block: 0.8rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  counter-increment: spec;
  font-size: 0.94rem;
}

.spec-list li::before {
  content: counter(spec, decimal-leading-zero);
  color: var(--accent);
  font: 700 0.66rem/1.9 var(--mono);
  letter-spacing: 0.1em;
}

/* схема пайплайна */
.fig {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
}

.fig-canvas {
  padding: 1rem 1rem 0.5rem;
}

.fig svg {
  display: block;
  width: 100%;
  height: auto;
}

.fig-cap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 600 0.6rem/1.6 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.pipe .b {
  fill: none;
  stroke: var(--line-strong);
}

.pipe .b-dash {
  fill: none;
  stroke: var(--line-strong);
  stroke-dasharray: 4 3;
}

.pipe .w {
  stroke: var(--line-strong);
  fill: none;
}

.pipe text {
  fill: var(--muted);
  font: 600 10px var(--mono);
  letter-spacing: 0.06em;
}

.pipe .t-ink {
  fill: var(--ink);
  font-weight: 700;
}

.pipe .t-acc {
  fill: var(--accent);
  font-weight: 700;
}

/* спецификация (метрики) */
.metrics-wrap {
  margin: 0 clamp(1.1rem, 3vw, 2.25rem);
  border: 1px solid var(--line);
}

.metrics-cap {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 650 0.6rem/1.6 var(--mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metrics > div {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1rem;
}

.metrics > div + div {
  border-left: 1px solid var(--line);
}

.metrics dt {
  color: var(--ink);
  font: 700 clamp(1.3rem, 2.4vw, 1.9rem)/1 var(--mono);
  letter-spacing: -0.01em;
}

.metrics dd {
  margin: 0;
  color: var(--muted);
  font: 600 0.62rem/1.5 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tech-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.6rem;
}

.project-featured > .tech-line {
  margin: 0;
  padding: 1.25rem clamp(1.1rem, 3vw, 2.25rem) 1.5rem;
}

.tech-line span {
  padding: 0.34rem 0.55rem;
  border: 1px solid var(--line);
  color: var(--muted);
  font: 650 0.6rem/1.2 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* малые карточки */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
  margin-top: 1.1rem;
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 2.6vw, 1.9rem);
  border: 1px solid var(--line);
  background: var(--paper);
  transition: border-color 0.2s ease;
}

.project-card::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 13px;
  height: 13px;
  border-top: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.project-card:hover {
  border-color: var(--line-strong);
}

.project-card:hover::after {
  opacity: 1;
}

.project-card .lbl {
  margin-bottom: 0.85rem;
}

.project-card h3 {
  margin-bottom: 0.8rem;
  font: 700 1.12rem/1.3 var(--mono);
  letter-spacing: -0.005em;
}

.project-card .project-meta {
  margin: -0.4rem 0 0.9rem;
  text-align: left;
}

.project-card > p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.project-card .tech-line {
  margin-top: auto;
  padding-top: 0.5rem;
}

/* ---------- 7. Архитектура: превью ---------- */

.architecture-teaser-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
}

.arch-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--paper);
  transition: border-color 0.2s ease;
}

.arch-card:hover {
  border-color: var(--line-strong);
}

.arch-card .ph {
  min-height: 230px;
  border: 0;
  border-bottom: 1px solid var(--line);
}

.arch-card-copy {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: clamp(1.25rem, 2.6vw, 1.8rem);
}

.arch-card-copy .lbl {
  margin-bottom: 0.85rem;
}

.arch-card-copy h3 {
  margin-bottom: 0.75rem;
  font: 700 1.14rem/1.3 var(--mono);
}

.arch-card-copy h3 a {
  background: linear-gradient(currentColor, currentColor) no-repeat left bottom / 0% 1px;
  text-decoration: none;
  transition: background-size 0.25s ease, color 0.15s ease;
}

.arch-card-copy h3 a:hover {
  background-size: 100% 1px;
  color: var(--accent);
}

.arch-card-copy p {
  color: var(--muted);
  font-size: 0.92rem;
}

.text-link {
  display: inline-block;
  width: max-content;
  margin-top: 1rem;
  background: linear-gradient(currentColor, currentColor) no-repeat left bottom / 100% 1px;
  color: var(--accent);
  font: 700 0.7rem/1.6 var(--mono);
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
}

.text-link:hover {
  color: var(--accent-dim);
}

/* ---------- 8. Плейсхолдер чертежа ---------- */

.ph {
  position: relative;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.6rem;
  min-height: 210px;
  padding: 1.5rem;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-2);
  color: var(--muted);
  font: 650 0.62rem/1.5 var(--mono);
  letter-spacing: 0.14em;
  text-align: center;
  text-transform: uppercase;
}

.ph-x {
  position: absolute;
  inset: 8px;
  width: calc(100% - 16px);
  height: calc(100% - 16px);
  pointer-events: none;
}

.ph-x line,
.ph-x rect {
  stroke: color-mix(in srgb, var(--line-strong) 55%, transparent);
  fill: none;
  vector-effect: non-scaling-stroke;
}

.ph > * {
  position: relative;
}

.ph code {
  max-width: min(92%, 30rem);
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--accent);
  font: 600 0.6rem/1.5 var(--mono);
  letter-spacing: 0.03em;
  overflow-wrap: anywhere;
  text-transform: none;
}

.ph-scale {
  position: absolute;
  bottom: 0.65rem;
  left: 0.85rem;
  color: var(--soft);
  font: 600 0.58rem/1 var(--mono);
  letter-spacing: 0.14em;
}

.ph-rev {
  position: absolute;
  right: 0.85rem;
  bottom: 0.65rem;
  color: var(--soft);
  font: 600 0.58rem/1 var(--mono);
  letter-spacing: 0.14em;
}

/* ---------- 9. Стек ---------- */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.skill-cell {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-height: 200px;
  padding: clamp(1.25rem, 2.6vw, 1.8rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.skill-cell h3 {
  font: 700 0.98rem/1.3 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.skill-cell p {
  margin: 0;
  color: var(--muted);
  font: 500 0.8rem/1.75 var(--mono);
  overflow-wrap: anywhere;
}

/* ---------- 10. Образование ---------- */

.education-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.education-list li {
  display: grid;
  grid-template-columns: minmax(150px, 0.28fr) minmax(0, 1fr);
  gap: 1rem 2rem;
  padding-block: 1.9rem;
  border-bottom: 1px solid var(--line);
}

.education-year {
  color: var(--accent);
  font: 700 0.7rem/1.9 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.education-list h3 {
  margin-bottom: 0.35rem;
  font: 700 1.1rem/1.35 var(--mono);
}

.education-list p {
  color: var(--muted);
  font-size: 0.94rem;
}

/* ---------- 11. architecture.html ---------- */

.architecture-hero .hero-main {
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  align-items: end;
}

.architecture-hero h1 {
  max-width: 14ch;
  font-size: clamp(2.4rem, 7vw, 6.2rem);
}

.architecture-hero-copy {
  color: var(--muted);
  font-size: clamp(0.98rem, 1.5vw, 1.12rem);
}

.architecture-hero-copy p {
  margin: 0 0 1rem;
}

.rev-note {
  margin-top: 1.6rem;
  border: 1px solid var(--line-strong);
}

.rev-note-head {
  padding: 0.45rem 0.9rem;
  border-bottom: 1px solid var(--line);
  color: var(--accent);
  font: 700 0.6rem/1.6 var(--mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.rev-note p {
  margin: 0;
  padding: 0.8rem 0.9rem 0.9rem;
  color: var(--muted);
  font: 500 0.78rem/1.7 var(--mono);
}

/* кейс-листы */
.case-body {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  align-items: start;
  gap: clamp(1.75rem, 4.5vw, 4rem);
}

.case-flip .case-body .case-visual {
  order: 2;
}

.case-flip .case-body .case-copy {
  order: 1;
}

.case-visual .ph-large {
  min-height: clamp(340px, 46vw, 600px);
}

.visual-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin-top: 0.8rem;
}

.visual-pair .ph {
  min-height: 170px;
}

.case-copy {
  position: sticky;
  top: 5.4rem;
}

.case-copy .lbl {
  margin-bottom: 1rem;
}

.case-copy h3 {
  margin-bottom: 1rem;
  font: 700 clamp(1.5rem, 2.8vw, 2.1rem)/1.05 var(--mono);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.case-copy > p {
  color: var(--muted);
  font-size: 0.97rem;
}

.case-facts {
  margin: 1.75rem 0;
  border-top: 1px solid var(--line);
}

.case-facts div {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1rem;
  padding-block: 0.6rem;
  border-bottom: 1px solid var(--line);
}

.case-facts dt,
.case-facts dd {
  margin: 0;
  font: 650 0.66rem/1.6 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-facts dt {
  color: var(--accent);
}

.case-facts dd {
  color: var(--muted);
}

/* пометка красным пером */
.domain-bridge {
  position: relative;
  margin-top: 1.5rem;
  padding-top: 0.9rem;
  color: var(--muted);
  font: 500 0.8rem/1.7 var(--mono);
}

.domain-bridge::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 2.4rem;
  border-top: 2px solid var(--accent);
}

.domain-bridge strong {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* подача */
.submission-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.62fr);
  align-items: start;
  gap: clamp(2rem, 6vw, 5rem);
}

.submission-grid .sheet-title {
  font-size: clamp(1.6rem, 3.4vw, 2.9rem);
}

.submission-copy {
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.97rem;
}

.submission-copy p {
  margin: 0 0 1rem;
}

/* ---------- 12. Штамп (футер) ---------- */

.stamp {
  border-color: color-mix(in srgb, var(--stamp-bg) 60%, var(--line-strong));
  background: var(--stamp-bg);
  color: var(--stamp-fg);
  margin-bottom: var(--gap-desk);
}

.stamp .sheet-head {
  border-color: var(--stamp-line);
  color: var(--stamp-muted);
}

.stamp .sheet-no {
  border-color: var(--stamp-line);
  color: var(--stamp-fg);
}

.stamp-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  align-items: end;
  gap: 2.5rem 4rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.stamp h2 {
  max-width: 16ch;
  font: 700 clamp(1.9rem, 4.2vw, 3.6rem)/1.02 var(--mono);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.stamp .lbl {
  margin-bottom: 1.2rem;
  color: var(--stamp-accent);
}

.stamp-contacts {
  display: grid;
  gap: 0.1rem;
}

.stamp-contacts .contact-link {
  font-size: 0.85rem;
}

.stamp-contacts .contact-key {
  color: var(--stamp-accent);
}

.stamp-contacts .contact-dots {
  border-color: var(--stamp-line);
}

.stamp-contacts .contact-link:hover .contact-value {
  color: var(--stamp-accent);
}

.stamp-contacts .contact-link:hover .contact-dots {
  border-color: var(--stamp-accent);
}

.stamp a:hover {
  color: var(--stamp-accent);
}

.stamp :focus-visible {
  outline-color: var(--stamp-accent);
}

/* таблица основной надписи */
.stamp-table {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border: 1px solid var(--stamp-line);
}

.stamp-cell {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.8rem 0.9rem;
}

.stamp-cell + .stamp-cell {
  border-left: 1px solid var(--stamp-line);
}

.stamp-cell .k {
  color: var(--stamp-muted);
  font: 650 0.56rem/1.4 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.stamp-cell .v {
  color: var(--stamp-fg);
  font: 700 0.78rem/1.4 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  overflow-wrap: anywhere;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--stamp-line);
  color: var(--stamp-muted);
  font: 600 0.64rem/1.6 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom a {
  text-decoration: none;
  background: linear-gradient(currentColor, currentColor) no-repeat left bottom / 0% 1px;
  transition: background-size 0.25s ease;
}

.footer-bottom a:hover {
  background-size: 100% 1px;
}

/* ---------- 13. Появление при скролле ---------- */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: calc(var(--d, 0) * 70ms);
}

.js [data-reveal].rv-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 14. Адаптив ---------- */

@media (max-width: 980px) {
  .hero-main,
  .architecture-hero .hero-main,
  .sheet-title-row,
  .feat-grid,
  .case-body,
  .submission-grid,
  .stamp-grid {
    grid-template-columns: 1fr;
  }

  .sheet-title-row {
    align-items: start;
  }

  .sheet-intro {
    max-width: 60ch;
  }

  .explication {
    max-width: 30rem;
  }

  .case-flip .case-body .case-visual {
    order: 1;
  }

  .case-flip .case-body .case-copy {
    order: 2;
  }

  .case-copy {
    position: static;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metrics > div {
    border-top: 1px solid var(--line);
  }

  .metrics > div:nth-child(-n + 2) {
    border-top: 0;
  }

  .metrics > div:nth-child(3) {
    border-left: 0;
  }

  .skills-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stamp-table {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .stamp-cell:nth-child(n + 4) {
    border-top: 1px solid var(--stamp-line);
  }

  .stamp-cell:nth-child(4) {
    border-left: 0;
  }

  .desk-divider {
    flex-wrap: wrap;
  }

  .desk-divider p {
    flex-basis: 100%;
  }
}

@media (max-width: 760px) {
  .header-inner {
    grid-template-columns: 1fr auto;
    gap: 0.15rem 1rem;
    padding-block: 0.6rem;
    min-height: 0;
  }

  .main-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    gap: 1.3rem;
    overflow-x: auto;
    padding-block: 0.45rem 0.2rem;
    scrollbar-width: none;
  }

  .main-nav::-webkit-scrollbar {
    display: none;
  }

  .header-controls {
    gap: 0.8rem;
  }
}

@media (max-width: 640px) {
  .sheet,
  .desk-divider {
    width: calc(100% - 1rem);
  }

  .sheet-body {
    padding-inline: 1rem;
  }

  .sheet-head {
    padding-inline: 1rem;
  }

  .project-grid,
  .architecture-teaser-grid,
  .skills-grid,
  .visual-pair {
    grid-template-columns: 1fr;
  }

  .skill-cell {
    min-height: 0;
  }

  .feat-head {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .project-meta {
    text-align: left;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .education-list li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
    padding-block: 1.4rem;
  }

  .stamp-table {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stamp-cell {
    border-top: 1px solid var(--stamp-line);
  }

  .stamp-cell:nth-child(-n + 2) {
    border-top: 0;
  }

  .stamp-cell:nth-child(odd) {
    border-left: 0;
  }

  .stamp-cell:nth-child(even) {
    border-left: 1px solid var(--stamp-line);
  }

  .contact-key {
    flex-basis: 2.9rem;
  }

  .hero-foot {
    padding-top: 1.25rem;
  }

  .case-visual .ph-large {
    min-height: 300px;
  }
}

/* ---------- 15. Печать ---------- */

@media print {
  :root,
  [data-theme="dark"] {
    --desk: #fff;
    --paper: #fff;
    --paper-2: #fff;
    --ink: #000;
    --muted: #303530;
    --soft: #555;
    --line: #b5b5b5;
    --line-strong: #000;
    --accent: #9c3211;
    --accent-dim: #9c3211;
    --stamp-bg: #fff;
    --stamp-fg: #000;
    --stamp-muted: #444;
    --stamp-line: #000;
    --stamp-accent: #9c3211;
  }

  body {
    background: #fff;
  }

  .site-header,
  .skip-link,
  .theme-toggle {
    display: none !important;
  }

  main {
    padding-block: 0;
  }

  .sheet,
  .desk-divider {
    width: 100%;
  }

  .sheet {
    margin-bottom: 1.25rem;
    border-color: #000;
    break-inside: avoid;
  }

  .sheet-case {
    break-before: page;
    break-inside: auto;
  }

  .hero-body {
    min-height: 0;
  }

  .hero-body::before {
    display: none;
  }

  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .case-copy {
    position: static;
  }

  .stamp {
    border: 1px solid #000;
  }

  a {
    text-decoration: none;
  }
}