/* N1K.PRO foundation — base layer: tokens, typography, header, footer, shared UI */

@font-face {
  font-family: "Unbounded";
  src: url("./fonts/unbounded-cyrillic.woff2") format("woff2");
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/jetbrains-mono-cyrillic.woff2") format("woff2");
  font-weight: 100 800;
  font-display: swap;
}

@font-face {
  font-family: "Instrument Serif";
  src: url("./fonts/instrument-serif-italic-latin-ext.woff2") format("woff2");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}

:root {
  --page: #090a0b;
  --panel: #0c0d0f;
  --panel-2: #101113;
  --ink: #f1f0eb;
  --muted: rgba(241, 240, 235, .68);
  --quiet: rgba(241, 240, 235, .42);
  --faint: rgba(241, 240, 235, .26);
  --line: rgba(255, 255, 255, .14);
  --line-soft: rgba(255, 255, 255, .08);
  --accent: #e8e7e1;
  --accent-rgb: 232, 231, 225;
  --accent-ink: #0a0a0b;
  --page-pad: clamp(22px, 4.2vw, 76px);
  --measure: 62ch;
  --header-h: 72px;
  --ease: cubic-bezier(.2, .72, .15, 1);
  color-scheme: dark;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

/* Branch accents — applied per page via data-mode on <html> */
[data-mode="marketing"] {
  --accent: #ff7650;
  --accent-rgb: 255, 118, 80;
  --accent-ink: #1b0904;
}

[data-mode="ai"] {
  --accent: #6fddff;
  --accent-rgb: 111, 221, 255;
  --accent-ink: #021116;
}

[data-mode="development"] {
  --accent: #91adff;
  --accent-rgb: 145, 173, 255;
  --accent-ink: #060b18;
}

[data-mode="projects"] {
  --accent: #d1f56b;
  --accent-rgb: 209, 245, 107;
  --accent-ink: #0c1202;
}

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

html {
  scroll-behavior: smooth;
  background: var(--page);
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--page);
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

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

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

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

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 12px 16px;
  transform: translateY(-160%);
  background: var(--ink);
  color: var(--page);
  font: 600 12px/1 "JetBrains Mono", monospace;
}

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

.mono {
  font-family: "JetBrains Mono", monospace;
  letter-spacing: .04em;
}

.ico-arrow {
  display: inline-block;
  width: 1.05em;
  height: 1.05em;
  vertical-align: -.16em;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform .25s var(--ease);
}

a:hover > .ico-arrow,
a:focus-visible > .ico-arrow {
  transform: translateX(2px);
}

.nowrap {
  white-space: nowrap;
}

/* ---------- Header / navigation ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: var(--header-h);
  padding: 0 var(--page-pad);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(9, 10, 11, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: max-content;
  gap: 12px;
  font-family: "Unbounded", sans-serif;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -.055em;
}

.brand-mark {
  display: grid;
  grid-template-columns: repeat(2, 5px);
  width: 15px;
  height: 15px;
  gap: 3px;
  transform: rotate(45deg);
}

.brand-mark i {
  background: currentColor;
}

.brand-mark i:nth-child(2),
.brand-mark i:nth-child(3) {
  background: var(--accent);
}

.brand-dot {
  color: var(--accent);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 2px;
}

.site-nav a {
  position: relative;
  padding: 8px 12px;
  color: var(--muted);
  font: 500 12px/1 "JetBrains Mono", monospace;
  letter-spacing: .02em;
  border-radius: 4px;
  transition: color .25s var(--ease), background-color .25s var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 1px;
  height: 1px;
  background: var(--accent);
}

.header-contact {
  display: inline-flex;
  align-items: center;
  justify-self: end;
  gap: 10px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font: 500 12px/1 "JetBrains Mono", monospace;
  transition: border-color .25s var(--ease), background-color .25s var(--ease);
}

.header-contact svg {
  width: 16px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  transition: transform .25s var(--ease);
}

.header-contact:hover,
.header-contact:focus-visible {
  border-color: rgba(var(--accent-rgb), .6);
  background: rgba(var(--accent-rgb), .08);
}

.header-contact:hover svg {
  transform: translate(3px, -3px);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  justify-self: end;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font: 500 12px/1 "JetBrains Mono", monospace;
  cursor: pointer;
}

.nav-toggle b {
  display: block;
  width: 16px;
  height: 8px;
  position: relative;
}

.nav-toggle b::before,
.nav-toggle b::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.4px;
  background: currentColor;
  transition: transform .3s var(--ease), top .3s var(--ease);
}

.nav-toggle b::before { top: 0; }
.nav-toggle b::after { top: 7px; }

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav,
  .header-contact {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }
}

/* Mobile drawer */
.nav-drawer {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  flex-direction: column;
  padding: calc(var(--header-h) + 20px) var(--page-pad) 40px;
  background: rgba(7, 8, 9, .97);
  backdrop-filter: blur(6px);
  overflow-y: auto;
}

.nav-drawer.is-open {
  display: flex;
}

body.nav-open {
  overflow: hidden;
}

.nav-drawer .drawer-close {
  position: absolute;
  top: 16px;
  right: var(--page-pad);
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font: 500 12px/1 "JetBrains Mono", monospace;
  cursor: pointer;
}

.nav-drawer nav {
  display: grid;
  gap: 2px;
  border-top: 1px solid var(--line-soft);
}

.nav-drawer nav a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--line-soft);
  font-family: "Unbounded", sans-serif;
  font-size: clamp(1.3rem, 6vw, 1.7rem);
  font-weight: 400;
  letter-spacing: -.04em;
  color: var(--muted);
}

.nav-drawer nav a[aria-current="page"] {
  color: var(--ink);
}

.nav-drawer nav a small {
  font: 500 10px/1 "JetBrains Mono", monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
}

.nav-drawer .drawer-contact {
  margin-top: auto;
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  color: var(--quiet);
  font: 500 12px/1.4 "JetBrains Mono", monospace;
}

.nav-drawer .drawer-contact a {
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
}

/* ---------- Shared UI ---------- */

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px 4px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font: 500 10px/1 "JetBrains Mono", monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--dot, var(--quiet));
}

.status[data-status="working"] { --dot: #d1f56b; color: #dfeeb4; border-color: rgba(209, 245, 107, .3); }
.status[data-status="measured"] { --dot: #6fddff; color: #bfeeff; border-color: rgba(111, 221, 255, .3); }
.status[data-status="prototype"] { --dot: #ff7650; color: #ffcbb9; border-color: rgba(255, 118, 80, .3); }
.status[data-status="research"] { --dot: #91adff; color: #cdd7ff; border-color: rgba(145, 173, 255, .3); }
.status[data-status="archive"] { --dot: rgba(241,240,235,.5); color: var(--quiet); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font: 500 13px/1 "JetBrains Mono", monospace;
  letter-spacing: .02em;
  transition: border-color .25s var(--ease), background-color .25s var(--ease), transform .25s var(--ease);
}

.btn svg {
  width: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  transition: transform .25s var(--ease);
}

.btn:hover svg,
.btn:focus-visible svg {
  transform: translate(3px, -3px);
}

.btn--accent {
  border-color: rgba(var(--accent-rgb), .5);
  background: rgba(var(--accent-rgb), .12);
  color: var(--ink);
}

.btn--accent:hover,
.btn--accent:focus-visible {
  background: rgba(var(--accent-rgb), .2);
  border-color: rgba(var(--accent-rgb), .8);
}

.btn--solid {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: rgba(var(--accent-rgb), .6);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 26px;
  color: var(--muted);
  font: 500 10px/1.2 "JetBrains Mono", monospace;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 27px;
  height: 1px;
  background: var(--accent);
  opacity: .7;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line-soft);
  background: #08090a;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.2fr) repeat(3, minmax(0, 1fr));
  gap: clamp(32px, 5vw, 72px);
  padding: clamp(56px, 7vw, 96px) var(--page-pad) 40px;
}

.footer-intro .brand {
  font-size: 18px;
  margin-bottom: 18px;
}

.footer-intro p {
  max-width: 34ch;
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
  text-wrap: pretty;
}

.footer-tg {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font: 500 13px/1 "JetBrains Mono", monospace;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 3px;
}

.footer-col h3 {
  margin: 0 0 18px;
  color: var(--quiet);
  font: 500 10px/1 "JetBrains Mono", monospace;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.footer-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 11px;
}

.footer-col a {
  color: var(--muted);
  font-size: 14px;
  transition: color .2s var(--ease);
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--ink);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  padding: 22px var(--page-pad);
  border-top: 1px solid var(--line-soft);
  color: var(--faint);
  font: 500 11px/1.5 "JetBrains Mono", monospace;
}

.footer-legal span {
  color: var(--quiet);
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-intro {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}
