.site-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 690px) minmax(0, 1fr);
  align-items: center;
  column-gap: 20px;
  width: calc(100% - 40px);
  margin: 24px auto 0;
}

.site-header .wordmark { justify-self: start; }
.site-header .language-switch { justify-self: end; }
.site-header .language-switch button { min-height: 30px; }
.portfolio-nav {
  display: grid;
  grid-template-areas: "start ask end";
  grid-template-columns: minmax(0, 1fr) minmax(0, 288px) minmax(0, 1fr);
  align-items: center;
  gap: 20px;
}
.nav-group { display: flex; align-items: center; }
.nav-group-start { grid-area: start; justify-content: flex-end; }
.nav-group-end { grid-area: end; }
.portfolio-nav .nav-link { white-space: nowrap; }
.portfolio-nav .nav-link:hover { opacity: 1; }

@property --ask-angle {
  syntax: "<angle>";
  inherits: true;
  initial-value: 0deg;
}

.ask-ai-trigger {
  --ask-spectrum: conic-gradient(from var(--ask-angle) at 50% 50%, #639cff, #ac83ff, #ff8b92, #ffbc82, #72e4ca, #639cff);
  grid-area: ask;
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  height: 56px;
  padding: 0 20px;
  border: 1px solid #303030;
  border-radius: 999px;
  background: #161616;
  color: #aaa;
  text-align: left;
  font: 400 14px/20px var(--font-sans);
  transition: color .2s ease, border-color .2s ease;
}
.ask-ai-trigger img { flex: none; }
.ask-ai-trigger [data-ask-label] { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.ask-glow {
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity .24s ease;
  mask-image: radial-gradient(ellipse 96px 58px at var(--ask-x, 50%) var(--ask-y, 50%), #000, transparent);
}
.ask-glow::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--ask-spectrum);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
}
.ask-ai-trigger:focus-visible { color: #f0f0f0; }
@media (hover: hover) and (pointer: fine) {
  .ask-ai-trigger:hover { animation: ask-spectrum 6s linear infinite; }
  .ask-ai-trigger:hover .ask-glow { opacity: 1; }
}
@keyframes ask-spectrum { to { --ask-angle: 1turn; } }

.vibe-toolkit {
  max-width: 760px;
  margin: 0 auto;
  padding: 14px 8px 16px;
  color: #c6c6c6;
  font-size: clamp(16px, 2vw, 21px);
  line-height: 1.8;
  font-weight: 500;
  letter-spacing: -.025em;
  text-align: center;
  text-wrap: pretty;
}
.toolkit-word { white-space: nowrap; color: #f1f1f1; }
.toolkit-marks { display: inline-flex; vertical-align: middle; padding-inline: 2px; }
.toolkit-mark {
  display: inline-grid;
  place-items: center;
  width: 27px;
  height: 27px;
  border: 1px solid #ffffff20;
  border-radius: 8px;
  background: #242424;
  transform: rotate(-7deg);
}
.toolkit-mark + .toolkit-mark { margin-left: -3px; transform: rotate(8deg); }
.toolkit-mark img { display: block; width: 17px; height: 17px; object-fit: contain; }
.toolkit-mark-openai { background: #17352c; }
.toolkit-mark-claude { background: #43271f; }
.toolkit-mark-figma { background: #2d2636; }
.toolkit-mark-react,.toolkit-mark-tailwindcss { background: #132a34; }

@media (max-width: 1040px) {
  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "brand language" "nav nav";
    row-gap: 14px;
  }
  .site-header .wordmark { grid-area: brand; }
  .site-header .language-switch { grid-area: language; }
  .portfolio-nav { grid-area: nav; width: min(690px, 100%); justify-self: center; }
}
@media (max-width: 730px) {
  .site-header { margin-top: 20px; }
  .portfolio-nav {
    grid-template-areas: "start end" "ask ask";
    grid-template-columns: auto auto;
    justify-content: center;
    gap: 10px 0;
  }
  .portfolio-nav .nav-link { font-size: 13px; padding: 12px 8px; }
  .ask-ai-trigger { justify-self: center; width: min(288px, 100%); height: 48px; }
  .vibe-toolkit { padding: 0 0 10px; line-height: 1.9; }
  .concepts-page { padding-top: 36px; }
}
@media (prefers-reduced-motion: reduce) {
  .ask-ai-trigger,.ask-ai-trigger:hover,.ask-glow {
    animation: none;
    transition: none;
  }
}

.mobile-header-actions { display: none; }

@media (max-width: 730px) {
  .site-header {
    position: relative;
    z-index: 8;
    grid-template-areas: "brand controls";
    column-gap: 12px;
  }
  .mobile-header-actions { grid-area: controls; display: flex; gap: 8px; align-items: center; }
  .mobile-header-actions button {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: #1b1b1b;
  }
  .mobile-header-actions button:active { background: #2a2a2a; }
  .mobile-menu-toggle { position: relative; }
  .mobile-menu-toggle span {
    position: absolute;
    width: 18px;
    height: 1.5px;
    border-radius: 2px;
    background: #eee;
    transform: translateY(-3px);
    transition: transform .25s cubic-bezier(.22,1,.36,1);
  }
  .mobile-menu-toggle span + span { transform: translateY(3px); }
  .menu-open .mobile-menu-toggle span { transform: rotate(45deg); }
  .menu-open .mobile-menu-toggle span + span { transform: rotate(-45deg); }

  .site-header .portfolio-nav {
    position: absolute;
    inset: calc(100% + 10px) 0 auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 10px;
    border-radius: 22px;
    background: #191919;
    box-shadow: 0 16px 44px #0008;
    transform-origin: top right;
    transform: translateY(-8px) scale(.97);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .22s, transform .27s cubic-bezier(.22,1,.36,1), visibility .27s;
  }
  .menu-open .portfolio-nav {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }
  .portfolio-nav .ask-ai-trigger { display: none; }
  .portfolio-nav .nav-group { display: contents; }
  .portfolio-nav .nav-link {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 12px 14px;
    border-radius: 13px;
    color: #d0d0d0;
    font-size: 17px;
    opacity: 1;
  }
  .portfolio-nav .nav-link[aria-current="page"] { background: #2a2a2a; color: #fff; }
  .portfolio-nav .language-switch { align-self: flex-start; margin: 10px 0 2px 5px; }
  .case-card-caption .case-card-copy { display: none; }
  .case-card-caption .case-company { flex-direction: column; align-items: flex-start; gap: 10px; }
  .case-card-caption .case-company-logo { order: 0; margin: 0; }
}
@media (max-width: 730px) and (prefers-reduced-motion: reduce) {
  .site-header .portfolio-nav,.mobile-menu-toggle span { transition: none; }
}