/* ==========================================================================
   Design Core Hub — Studio V6
   1. Motion system (transform/opacity only)
   2. Layout hardening: empty-space fixes + responsive corrections
   Loaded after studio-v5.css.
   ========================================================================== */

:root {
  --v6-ease: cubic-bezier(.22,.72,.2,1);
  --v6-ease-out: cubic-bezier(.16,1,.3,1);
}

/* ---------- 1. Motion ---------------------------------------------------- */

/* Entrance */
.v6-intro {
  opacity: 0;
  transform: translate3d(0, 18px, 0);
  transition: opacity .7s var(--v6-ease-out) var(--v6-delay, 0ms),
              transform .8s var(--v6-ease-out) var(--v6-delay, 0ms);
  will-change: opacity, transform;
}
.v6-intro-art { transform: translate3d(0, 26px, 0) scale(.985); }
.v6-loaded .v6-intro { opacity: 1; transform: none; }
/* Safety: if the JS switch never lands, content still shows. */
@media (scripting: enabled) {
  .v6-intro { animation: v6-failopen 0s linear 2.5s forwards; }
}
@keyframes v6-failopen { to { opacity: 1; transform: none; } }

/* Scroll reveal */
.v6-reveal {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition: opacity .68s var(--v6-ease-out) var(--v6-delay, 0ms),
              transform .78s var(--v6-ease-out) var(--v6-delay, 0ms);
}
.v6-reveal.v6-in { opacity: 1; transform: none; }

/* Smooth existing reveal timing */
.reveal {
  transition: opacity .7s var(--v6-ease-out) var(--reveal-delay, 0ms),
              transform .78s var(--v6-ease-out) var(--reveal-delay, 0ms);
}

/* Header: tighter, elevated on scroll */
.header {
  transition: background .3s var(--v6-ease), box-shadow .3s var(--v6-ease),
              min-height .3s var(--v6-ease), backdrop-filter .3s var(--v6-ease);
}
.header.scrolled { backdrop-filter: saturate(1.4) blur(14px); }
.header.scrolled .header-inner { padding-top: 8px; padding-bottom: 8px; }

/* Nav underline */
.nav-link::after { transition: right .34s var(--v6-ease), background .24s var(--v6-ease); }

/* Buttons */
.btn {
  transition: transform .26s var(--v6-ease), box-shadow .26s var(--v6-ease),
              background .24s var(--v6-ease), color .24s var(--v6-ease),
              border-color .24s var(--v6-ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(.985); transition-duration: .08s; }
.btn-primary:hover { box-shadow: 0 14px 30px rgba(36,107,254,.28); }
.btn i, .btn svg { transition: transform .3s var(--v6-ease); }
.btn:hover i, .btn:hover svg { transform: translateX(3px); }

/* Sheen on primary CTAs */
.v6-sheen { position: relative; overflow: hidden; isolation: isolate; }
.v6-sheen::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  background: radial-gradient(160px circle at var(--mx, 50%) 50%, rgba(255,255,255,.22), transparent 70%);
  transition: opacity .3s var(--v6-ease);
}
.v6-sheen:hover::after { opacity: 1; }

/* Cards */
.theme-card, .case-card, .article-card, .price-card, .bento-card, .doc-card, .process-step {
  transition: transform .4s var(--v6-ease), box-shadow .4s var(--v6-ease),
              border-color .3s var(--v6-ease);
}
.theme-card:hover, .case-card:hover, .article-card:hover, .doc-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 52px rgba(10,26,47,.13);
}
.price-card:hover { transform: translateY(-4px); box-shadow: 0 22px 54px rgba(10,26,47,.12); }
.theme-thumb img, .case-media img, .article-media img, .split-media img {
  transition: transform .9s var(--v6-ease-out);
}
.theme-card:hover .theme-thumb img { transform: scale(1.045); }

/* Signal strip + list hovers */
.signal { transition: background .3s var(--v6-ease); }
.signal:hover { background: #f7fafd; }
.footer-col a, .drop-link, .doc-link { transition: color .22s var(--v6-ease), transform .22s var(--v6-ease); }
.footer-col a:hover { transform: translateX(3px); }

/* Focus states */
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible {
  outline: 2px solid #4b8dfb;
  outline-offset: 3px;
  border-radius: 6px;
}

@media (prefers-reduced-motion: reduce) {
  .v6-intro, .v6-reveal, .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .btn:hover, .theme-card:hover, .case-card:hover, .article-card:hover,
  .doc-card:hover, .price-card:hover { transform: none; }
}

/* ---------- 2. Layout hardening ----------------------------------------- */

html { scroll-behavior: smooth; }
body { overflow-x: hidden; }
img, video, svg { max-width: 100%; }

/* No stray gaps from empty containers */
.section-head-side:empty,
.section-head-copy:empty,
.form-note:empty,
.stack:empty,
.cluster:empty { display: none; }
.section-head:not(:has(.section-head-side)):not(:has(.btn)) { display: block; }
.section-head-copy:only-child { max-width: 900px; }

/* Grid children must be allowed to shrink */
.hero-grid > *, .page-hero-grid > *, .split > *, .cta-inner > *,
.product-layout > *, .market-layout > *, .footer-main > *,
.bento > *, .theme-grid > *, .portfolio-grid > * { min-width: 0; }

/* Laptop: stop fixed minmax floors from forcing overflow */
@media (max-width: 1180px) {
  .hero-grid, .page-hero-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(36px, 4vw, 64px); }
  .theme-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cta-inner { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .cta-actions { justify-content: flex-start; }
}

/* Tablet */
@media (max-width: 1024px) {
  .hero-grid, .page-hero-grid, .split, .product-layout, .market-layout, .faq-layout, .contact-layout {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero { padding-top: clamp(56px, 8vw, 88px); padding-bottom: clamp(56px, 8vw, 92px); }
  .hero-art { aspect-ratio: 16 / 9; }
  .hero-art::before { display: none; }
  .signal-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .signal { min-height: 0; padding: 22px var(--page-pad); }
  .process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-step { min-height: 0; padding: 26px 26px 30px; }
  .process-step:first-child, .process-step:last-child { padding-left: 26px; padding-right: 26px; }
  .footer-main { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
}

/* Mobile */
@media (max-width: 760px) {
  :root { --section-y: clamp(48px, 9vw, 64px); }
  .section { padding-top: var(--section-y); padding-bottom: var(--section-y); }
  .hero { padding-top: 44px; padding-bottom: 48px; }
  .display { font-size: clamp(34px, 9vw, 46px); line-height: 1.08; }
  .h2 { font-size: clamp(26px, 6.4vw, 34px); }
  .lead { font-size: 17px; }

  .theme-grid, .market-main .theme-grid, .portfolio-grid, .bento,
  .pricing-grid, .process, .signal-strip { grid-template-columns: minmax(0, 1fr); }
  .bento-card, .bento-card.large { grid-column: 1 / -1; min-height: 0; padding: 24px; }
  .case-card.wide, .case-card.narrow { grid-column: 1 / -1; }

  /* Equal-height helpers become dead space on one column */
  .theme-features, .case-body, .article-body h3, .theme-thumb { min-height: 0; }
  .case-body { padding: 22px; }

  /* Floating hero cards overlap content on small screens */
  .floating-card { position: static; width: auto; }
  .hero-art .floating-card { display: none; }

  .cta { padding-top: 56px; padding-bottom: 56px; }
  .cta-copy h2 { font-size: clamp(28px, 7.4vw, 38px); }
  .cta-actions { flex-wrap: wrap; }
  .cta-actions .btn, .hero-actions .btn { flex: 1 1 200px; justify-content: center; }

  .footer { padding-top: 52px; }
  .footer-main { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 30px; padding-bottom: 34px; }
  .footer-bottom { flex-wrap: wrap; gap: 10px; }

  .tabs { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .tabs::-webkit-scrollbar { display: none; }
  .tab-btn { white-space: nowrap; }

  /* Touch targets */
  .btn, .tab-btn, .mobile-nav a, .footer-col a { min-height: 44px; }
  .mobile-nav a { display: flex; align-items: center; }
}

@media (max-width: 480px) {
  .footer-main { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .header-inner { gap: 12px; }
  .announce-inner span { display: none; }
  .proof-pill { font-size: 12px; }
}

/* Portfolio cards: media absorbs the leftover row height instead of
   leaving a blank card body (narrow cards next to a tall wide card). */
.portfolio-grid .case-card { display: flex; flex-direction: column; }
.portfolio-grid .case-media { flex: 1 1 auto; min-height: 220px; overflow: hidden; }
.portfolio-grid .case-media img { width: 100%; height: 100%; object-fit: cover; }
.portfolio-grid .case-body { flex: 0 0 auto; min-height: 0; }
@media (max-width: 760px) {
  .portfolio-grid .case-media { min-height: 0; aspect-ratio: 16 / 10; flex: 0 0 auto; }
}

/* Wide tables scroll instead of breaking the page */
@media (max-width: 1080px) {
  *:has(> .compare-table) { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .compare-table { min-width: 680px; }
}

/* Hover-less devices: no lift, keep taps crisp */
@media (hover: none) {
  .btn:hover, .theme-card:hover, .case-card:hover, .article-card:hover,
  .doc-card:hover, .price-card:hover { transform: none; box-shadow: inherit; }
}