/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body { line-height: 1.5; -webkit-font-smoothing: antialiased; }
img, picture, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }
a { color: inherit; text-decoration: none; }
input, textarea { font: inherit; color: inherit; background: none; border: none; }

/* === Theme tokens === */
:root,
[data-theme="dark"] {
  --bg: #0a0a0a;
  --fg: #e8e8e8;
  --fg-muted: #999;
  --fg-faint: #666;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --surface: rgba(255, 255, 255, 0.02);
  --surface-strong: rgba(255, 255, 255, 0.06);
  --cta-bg: #fff;
  --cta-fg: #000;
  --accent: #ff5c33;
}

:root { --sidebar-w: 240px; }

[data-theme="light"] {
  --bg: #fafafa;
  --fg: #0a0a0a;
  --fg-muted: #555;
  --fg-faint: #888;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.15);
  --surface: rgba(0, 0, 0, 0.02);
  --surface-strong: rgba(0, 0, 0, 0.06);
  --cta-bg: #0a0a0a;
  --cta-fg: #fff;
  --accent: #ff5c33;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --bg: #fafafa;
    --fg: #0a0a0a;
    --fg-muted: #555;
    --fg-faint: #888;
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.15);
    --surface: rgba(0, 0, 0, 0.02);
    --surface-strong: rgba(0, 0, 0, 0.06);
    --cta-bg: #0a0a0a;
    --cta-fg: #fff;
  }
}

/* === Base === */
body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
}

.mono {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* === Container === */
.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Motion === */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* === Top bar (mobile header on sidebar pages) === */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
}
.topbar__brand { color: var(--fg); font-weight: 500; letter-spacing: 0.02em; }
.topbar__controls { display: flex; gap: 18px; align-items: center; }
.lang-switch a { color: var(--fg-muted); transition: color 150ms; }
.lang-switch a:hover { color: var(--fg); }
.lang-switch a.is-active { color: var(--fg); font-weight: 500; }
.lang-switch span { color: var(--fg-faint); margin: 0 6px; }
.theme-toggle {
  width: 24px; height: 24px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-strong); border-radius: 6px;
  color: var(--fg-muted); transition: color 150ms, border-color 150ms;
}
.theme-toggle:hover { color: var(--fg); border-color: var(--fg-muted); }
.theme-toggle svg { width: 14px; height: 14px; }
.topbar__left { display: flex; align-items: center; gap: 12px; }

/* === Hamburger toggle (mobile only) === */
.nav-toggle {
  width: 30px; height: 30px;
  display: inline-flex; align-items: center; justify-content: center;
  margin-left: -6px;
  border: 1px solid var(--border-strong); border-radius: 7px;
  color: var(--fg-muted);
  transition: color 150ms, border-color 150ms;
}
.nav-toggle:hover { color: var(--fg); border-color: var(--fg-muted); }
.nav-toggle svg { width: 15px; height: 15px; }

/* === Left sidebar === */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 40;
  width: var(--sidebar-w);
  display: flex; flex-direction: column;
  padding: 22px 16px;
  border-right: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow-y: auto;
}
.sidebar__brand {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 14px; font-weight: 500;
  color: var(--fg); letter-spacing: 0.02em;
  padding: 0 10px;
  margin-bottom: 26px;
}
.sidebar__nav { display: flex; flex-direction: column; gap: 1px; }
.sidebar__link {
  display: flex; align-items: center; gap: 9px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12.5px; letter-spacing: 0.01em;
  color: var(--fg-muted);
  padding: 8px 10px; border-radius: 7px;
  transition: color 150ms, background 150ms;
}
.sidebar__link::before { content: '//'; color: var(--fg-faint); transition: color 150ms; }
.sidebar__link:hover { color: var(--fg); background: var(--surface-strong); }
.sidebar__link.is-active { color: var(--fg); background: var(--surface-strong); }
.sidebar__link.is-active::before { color: var(--accent); }
.sidebar__foot {
  margin-top: auto; padding-top: 18px;
  display: flex; flex-direction: column; gap: 14px;
  border-top: 1px solid var(--border);
}
.sidebar__tg {
  display: inline-flex; flex-direction: column; gap: 2px;
  padding: 0 10px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}
.sidebar__tg b { font-size: 13px; font-weight: 500; color: var(--fg); }
.sidebar__tg span { font-size: 10px; color: var(--fg-faint); letter-spacing: 0.08em; text-transform: uppercase; }
.sidebar__tg:hover b { color: var(--accent); }
.sidebar__controls {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 10px;
}

/* === Backdrop scrim (mobile drawer) === */
.sidebar__scrim {
  position: fixed; inset: 0; z-index: 30;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0; visibility: hidden;
  transition: opacity 200ms, visibility 200ms;
}

/* === Sidebar layout: desktop vs mobile drawer === */
@media (min-width: 900px) {
  .has-sidebar { padding-left: var(--sidebar-w); }
  .has-sidebar .topbar { display: none; }
}
@media (max-width: 899px) {
  .has-sidebar .sidebar {
    width: min(284px, 82vw);
    transform: translateX(-100%);
    visibility: hidden;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.4);
    transition: transform 220ms ease, visibility 220ms;
  }
  .has-sidebar.nav-open .sidebar { transform: translateX(0); visibility: visible; }
  .has-sidebar.nav-open .sidebar__scrim { opacity: 1; visibility: visible; }
}

/* === Section === */
.section { padding: 64px 0; border-bottom: 1px dashed var(--border); scroll-margin-top: 72px; }
.hero { scroll-margin-top: 72px; }
.section:last-of-type { border-bottom: none; }
.section__label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.section__title {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 32px;
}

/* === Pill === */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  padding: 4px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}
.pill__dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

/* === Button === */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 500;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  color: var(--fg);
  background: var(--surface-strong);
  transition: background 150ms, border-color 150ms;
}
.btn:hover { background: var(--surface); border-color: var(--fg-muted); }
.btn--primary {
  background: var(--cta-bg); color: var(--cta-fg); border-color: var(--cta-bg);
}
.btn--primary:hover { opacity: 0.9; background: var(--cta-bg); border-color: var(--cta-bg); }

/* === Hero === */
.hero { padding: 96px 0 64px; }
.hero__pill { margin-bottom: 24px; }
.hero__title {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 500;
  max-width: 18ch;
  margin-bottom: 16px;
}
.hero__sub {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 50ch;
  margin-bottom: 28px;
}
.hero__cta { display: flex; gap: 10px; flex-wrap: wrap; }

/* === Direction grid === */
.grid-2x2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.grid-2x2 .card {
  background: var(--bg);
  padding: 24px;
  display: flex; flex-direction: column; gap: 8px;
}
.card__num {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.05em;
}
.card__title {
  font-size: 16px; font-weight: 500;
  letter-spacing: -0.005em;
}
.card__lead {
  font-size: 13px; color: var(--fg-muted); line-height: 1.55;
}
.card__items {
  list-style: none; margin-top: 6px;
  display: flex; flex-direction: column; gap: 4px;
}
.card__items li {
  font-size: 12px; color: var(--fg-muted);
  padding-left: 14px; position: relative;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}
.card__items li::before {
  content: '+'; position: absolute; left: 0; color: var(--fg-faint);
}

@media (max-width: 640px) {
  .grid-2x2 { grid-template-columns: 1fr; }
}

/* === Clients === */
.logo-row {
  display: flex; flex-wrap: wrap; gap: 32px 40px;
  align-items: center;
  opacity: 0.65;
}
.logo-row__item {
  font-size: 18px; font-weight: 500; letter-spacing: -0.01em;
  color: var(--fg);
}
.logo-row__item--placeholder {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--fg-faint);
  font-weight: 400;
}

/* === About === */
.about {
  display: flex; gap: 24px; align-items: flex-start;
}
.about__photo {
  width: 80px; height: 80px; border-radius: 50%;
  object-fit: cover; flex-shrink: 0;
  background: var(--surface-strong);
}
.about__body { font-size: 14px; color: var(--fg-muted); line-height: 1.65; max-width: 55ch; }
.about__body strong { color: var(--fg); font-weight: 500; }
.about__links {
  display: flex; gap: 18px;
  margin-top: 14px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
}
.about__links a {
  color: var(--fg-muted);
  border-bottom: 1px dotted var(--fg-faint);
  transition: color 150ms;
}
.about__links a:hover { color: var(--fg); }

@media (max-width: 480px) {
  .about { flex-direction: column; gap: 16px; }
}

/* === Business card === */
.bizcard {
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  padding: 28px;
  max-width: 460px;
  position: relative;
}
.bizcard::before {
  content: ''; position: absolute;
  top: -1px; left: 20%; right: 20%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--fg-muted), transparent);
}
.bizcard__topline {
  display: flex; justify-content: space-between;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 10px;
  color: var(--fg-faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.bizcard__name { font-size: 22px; font-weight: 500; letter-spacing: -0.01em; }
.bizcard__role { font-size: 13px; color: var(--fg-muted); margin-top: 2px; }
.bizcard__contacts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  margin: 18px 0;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.bizcard__contacts dt { color: var(--fg-faint); }
.bizcard__contacts dd { color: var(--fg); }
.bizcard__contacts a { color: var(--fg); border-bottom: 1px dotted var(--fg-faint); }
.bizcard__qrRow { display: flex; gap: 18px; align-items: center; margin-top: 16px; }
.bizcard__qr {
  width: 96px; height: 96px;
  background: #fff; padding: 6px; border-radius: 6px;
  flex-shrink: 0;
}
.bizcard__actions { display: flex; flex-direction: column; gap: 8px; }
.bizcard__copy[data-state="copied"] { color: var(--accent); }

/* === Brief form === */
.brief {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  max-width: 560px;
}
.brief__row { display: flex; flex-direction: column; gap: 14px; }
.brief__field { display: flex; flex-direction: column; gap: 6px; }
.brief__field label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.04em;
}
.brief__field input,
.brief__field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font-size: 14px;
  transition: border-color 150ms;
}
.brief__field input:focus,
.brief__field textarea:focus {
  outline: none; border-color: var(--fg-muted);
}
.brief__field textarea { min-height: 100px; resize: vertical; }
.brief__honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; }
.brief__submit { margin-top: 6px; align-self: flex-start; }
.brief__status {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px; margin-top: 10px;
}
.brief__status[data-state="ok"] { color: var(--accent); }
.brief__status[data-state="error"] { color: #ff6464; }

/* === Footer === */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--fg-faint);
}
.footer__inner {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer a { color: var(--fg-muted); transition: color 150ms; }
.footer a:hover { color: var(--fg); }

/* === /card standalone page === */
.card-page {
  min-height: calc(100dvh - 46px);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 48px 24px;
  gap: 16px;
}
.card-page .bizcard { width: 100%; max-width: 460px; }
.card-page__return {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.05em;
}
.card-page__return a { color: var(--fg-muted); border-bottom: 1px dotted var(--fg-faint); }
.card-page__return a:hover { color: var(--fg); }

/* === Focus rings === */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}
.btn:focus-visible {
  outline-offset: 3px;
}