/* Premium flagship layer.
 * The portfolio shell and hero geometry remain shared. This file raises the
 * five concept cases from a generic theme to a coherent exhibition standard.
 */

.flagship-case {
  --brand-display: Inter, ui-sans-serif, system-ui, sans-serif;
  --brand-body: Inter, ui-sans-serif, system-ui, sans-serif;
  --brand-mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  --brand-radius: 2px;
  --brand-light: rgba(255, 255, 255, .84);
  --brand-faint: rgba(255, 255, 255, .045);
  --brand-shadow: 0 34px 100px rgba(0, 0, 0, .36);
  font-family: var(--brand-body);
}

.flagship-case main {
  isolation: isolate;
  position: relative;
}

.flagship-case main::before {
  background:
    linear-gradient(90deg, transparent 0 49.92%, color-mix(in srgb, var(--case-accent) 7%, transparent) 50%, transparent 50.08%),
    linear-gradient(color-mix(in srgb, var(--case-ink) 2.8%, transparent) 1px, transparent 1px);
  background-size: 100% 100%, 100% 96px;
  content: "";
  inset: 0;
  opacity: .5;
  pointer-events: none;
  position: absolute;
  z-index: -1;
}

.flagship-case .site-header {
  backdrop-filter: blur(20px) saturate(1.15);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--case-accent) 18%, transparent);
}

.flagship-case .case-hero {
  background:
    radial-gradient(circle at 18% 44%, color-mix(in srgb, var(--case-accent) 12%, transparent), transparent 30%),
    linear-gradient(118deg, color-mix(in srgb, var(--case-bg) 88%, #000) 0 48%, var(--case-bg) 48%);
  position: relative;
}

.flagship-case .case-hero::before {
  border: 1px solid color-mix(in srgb, var(--case-accent) 22%, transparent);
  content: "";
  inset: 176px clamp(12px, 3.5vw, 48px) 36px;
  pointer-events: none;
  position: absolute;
}

.flagship-case .case-hero::after {
  background: var(--case-accent);
  box-shadow:
    18px 0 0 color-mix(in srgb, var(--case-accent) 42%, transparent),
    36px 0 0 color-mix(in srgb, var(--case-accent) 18%, transparent);
  content: "";
  height: 2px;
  left: clamp(38px, 6vw, 90px);
  position: absolute;
  top: 176px;
  width: 52px;
}

.flagship-case .case-hero-image {
  background: var(--case-panel);
  border: 1px solid color-mix(in srgb, var(--case-accent) 30%, transparent);
  box-shadow: var(--brand-shadow);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
  position: relative;
}

.flagship-case .case-hero-image::before {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--case-bg) 12%, transparent), transparent 40%),
    linear-gradient(0deg, color-mix(in srgb, var(--case-bg) 72%, transparent), transparent 56%);
  content: "";
  inset: 0;
  pointer-events: none;
  position: absolute;
  z-index: 2;
}

.flagship-case .case-hero-image::after {
  border-bottom: 2px solid var(--case-accent);
  border-left: 2px solid var(--case-accent);
  bottom: 20px;
  content: "";
  height: 34px;
  left: 20px;
  pointer-events: none;
  position: absolute;
  width: 34px;
  z-index: 3;
}

.flagship-case .case-hero-image > img {
  scale: 1.025;
  transition: filter 1.4s ease, scale 8s cubic-bezier(.18, .72, .2, 1);
}

.flagship-case.is-brand-ready .case-hero-image > img {
  scale: 1;
}

.flagship-case .case-hero-content {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--case-panel) 94%, transparent), color-mix(in srgb, var(--case-bg) 98%, transparent));
  border: 1px solid color-mix(in srgb, var(--case-accent) 22%, transparent);
  box-shadow: var(--brand-shadow);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  position: relative;
}

.flagship-case .case-hero-content::before,
.flagship-case .case-hero-content::after {
  content: "";
  pointer-events: none;
  position: absolute;
}

.flagship-case .case-hero-content::before {
  background: var(--case-accent);
  height: 2px;
  left: 44px;
  opacity: .7;
  top: 0;
  width: 120px;
}

.flagship-case .case-hero-content::after {
  border-bottom: 1px solid color-mix(in srgb, var(--case-accent) 50%, transparent);
  border-right: 1px solid color-mix(in srgb, var(--case-accent) 50%, transparent);
  bottom: 14px;
  height: 26px;
  right: 14px;
  width: 26px;
}

.flagship-case .case-wordmark {
  align-items: center;
  gap: 14px;
  margin: 0 0 20px;
}

.flagship-case .case-wordmark__asset {
  filter: drop-shadow(0 8px 20px rgba(0, 0, 0, .26));
  height: 52px;
  object-fit: contain;
  width: 52px;
}

.flagship-case .case-wordmark__name {
  color: var(--case-ink);
  font-family: var(--brand-display);
  font-size: .92rem;
  letter-spacing: .19em;
  line-height: 1.15;
}

.flagship-case .case-hero-content .eyebrow,
.flagship-case .flagship-section .eyebrow {
  color: var(--case-accent);
  font-family: var(--brand-mono) !important;
  font-weight: 700;
}

.flagship-case .case-hero-content h1,
.flagship-case .flagship-section h2 {
  font-family: var(--brand-display) !important;
}

.flagship-case .case-status {
  border-left: 1px solid color-mix(in srgb, var(--case-accent) 55%, transparent);
  font-family: var(--brand-mono);
  margin-top: auto;
  padding-left: 14px;
}

.flagship-case .case-status::before {
  animation: brand-status 2.4s ease-in-out infinite;
}

@keyframes brand-status {
  50% { box-shadow: 0 0 24px color-mix(in srgb, var(--case-signal) 76%, transparent); opacity: .65; }
}

.flagship-case .flagship-strip {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--case-panel) 96%, #000), var(--case-panel));
  border-color: color-mix(in srgb, var(--case-accent) 22%, transparent);
  position: relative;
}

.flagship-case .flagship-strip::before {
  background: linear-gradient(90deg, transparent, var(--case-accent), transparent);
  content: "";
  height: 1px;
  inset: -1px 8% auto;
  opacity: .58;
  position: absolute;
}

.flagship-case .flagship-strip article {
  min-height: 132px;
  padding-top: 2.1rem;
  position: relative;
}

.flagship-case .flagship-strip article::before {
  color: color-mix(in srgb, var(--case-accent) 74%, var(--case-muted));
  content: "0" counter(list-item);
  font: 700 .62rem/1 var(--brand-mono);
  left: 1.2rem;
  letter-spacing: .08em;
  position: absolute;
  top: 1.1rem;
}

.flagship-case .flagship-strip span {
  font-family: var(--brand-mono);
}

.flagship-case .flagship-strip strong {
  display: block;
  font-family: var(--brand-display);
  max-width: 20ch;
}

.brand-signature {
  align-items: center;
  background:
    linear-gradient(118deg, color-mix(in srgb, var(--case-panel) 92%, #000), color-mix(in srgb, var(--case-bg) 96%, transparent));
  border-bottom: 1px solid color-mix(in srgb, var(--case-accent) 18%, transparent);
  display: grid;
  gap: clamp(2.5rem, 7vw, 8rem);
  grid-template-columns: minmax(320px, .8fr) minmax(0, 1.2fr);
  padding: clamp(4.5rem, 8vw, 8rem) clamp(1.4rem, 6vw, 7rem);
  position: relative;
}

.brand-signature::before {
  background: linear-gradient(90deg, var(--case-accent), transparent);
  content: "";
  height: 1px;
  left: clamp(1.4rem, 6vw, 7rem);
  position: absolute;
  right: 55%;
  top: 2.4rem;
}

.brand-signature__logo {
  align-items: center;
  display: flex;
  min-height: 210px;
  position: relative;
}

.brand-signature__logo::before {
  border: 1px solid color-mix(in srgb, var(--case-accent) 18%, transparent);
  content: "";
  inset: 0;
  position: absolute;
}

.brand-signature__logo::after {
  background: var(--case-accent);
  content: "";
  height: 2px;
  left: 0;
  position: absolute;
  top: 0;
  width: 64px;
}

.brand-signature__logo img {
  display: block;
  height: auto;
  max-width: 100%;
  object-fit: contain;
  padding: clamp(1.2rem, 3vw, 2.4rem);
  position: relative;
  width: 100%;
  z-index: 1;
}

.brand-signature__story {
  max-width: 720px;
}

.brand-signature__story > span {
  color: var(--case-accent);
  display: block;
  font: 700 .66rem/1.2 var(--brand-mono);
  letter-spacing: .12em;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.brand-signature__story h2 {
  color: var(--case-ink);
  font: 500 clamp(2.1rem, 4.2vw, 4.8rem)/.96 var(--brand-display);
  letter-spacing: -.045em;
  margin: 0;
  max-width: 12ch;
}

.brand-signature__story p {
  color: var(--case-muted);
  font-size: 1rem;
  line-height: 1.68;
  margin: 1.5rem 0 0;
  max-width: 62ch;
}

.brand-signature__palette {
  display: flex;
  gap: .55rem;
  margin-top: 2rem;
}

.brand-signature__palette i {
  background: var(--swatch);
  border: 1px solid color-mix(in srgb, var(--case-ink) 18%, transparent);
  height: 30px;
  position: relative;
  width: 58px;
}

.brand-signature__palette i::after {
  color: var(--case-muted);
  content: attr(data-label);
  font: 600 .52rem/1 var(--brand-mono);
  left: 0;
  letter-spacing: .06em;
  position: absolute;
  top: calc(100% + 7px);
  white-space: nowrap;
}

.flagship-case .flagship-section {
  position: relative;
}

.flagship-case .flagship-section::before {
  content: none;
}

.flagship-case .flagship-section__head {
  align-items: start;
  position: relative;
}

.flagship-case .flagship-section__head::after {
  background: linear-gradient(90deg, var(--case-accent), transparent);
  content: "";
  height: 1px;
  left: 0;
  opacity: .5;
  position: absolute;
  top: -1.5rem;
  width: min(280px, 32vw);
}

.flagship-case .flagship-section__head h2 {
  color: var(--case-ink);
  text-wrap: balance;
}

.flagship-case .human-evidence__image,
.flagship-case .material-gallery figure {
  border: 1px solid color-mix(in srgb, var(--case-accent) 24%, transparent);
  border-radius: var(--brand-radius);
  box-shadow: var(--brand-shadow);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.flagship-case .human-evidence__image::after,
.flagship-case .material-gallery figure::after {
  background: linear-gradient(180deg, transparent 45%, color-mix(in srgb, var(--case-bg) 88%, transparent));
  content: "";
  inset: 0;
  pointer-events: none;
  position: absolute;
}

.flagship-case .evidence-card,
.flagship-case .feature-card {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--case-panel-soft) 88%, transparent), color-mix(in srgb, var(--case-bg) 94%, transparent));
  border-color: color-mix(in srgb, var(--case-accent) 20%, transparent);
  border-radius: var(--brand-radius);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .16);
  overflow: hidden;
  position: relative;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}

.flagship-case .evidence-card::before,
.flagship-case .feature-card::before {
  background: var(--case-accent);
  content: "";
  height: 1px;
  left: 0;
  position: absolute;
  top: 0;
  width: 62px;
}

.flagship-case .evidence-card:hover,
.flagship-case .feature-card:hover {
  border-color: color-mix(in srgb, var(--case-accent) 48%, transparent);
  box-shadow: 0 24px 62px rgba(0, 0, 0, .26);
  transform: translateY(-4px);
}

.flagship-case .prototype-shell {
  background: color-mix(in srgb, var(--case-panel) 94%, #000);
  border-color: color-mix(in srgb, var(--case-accent) 34%, transparent);
  border-radius: var(--brand-radius);
  box-shadow:
    0 50px 120px rgba(0, 0, 0, .42),
    0 0 0 1px color-mix(in srgb, var(--case-accent) 7%, transparent);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  position: relative;
}

.flagship-case .prototype-shell::before {
  background: linear-gradient(90deg, var(--case-accent), transparent);
  content: "";
  height: 2px;
  inset: 0 36% auto 0;
  position: absolute;
  z-index: 4;
}

.flagship-case .prototype-topbar {
  font-family: var(--brand-mono);
  min-height: 62px;
  padding-inline: 1.5rem;
}

.flagship-case .prototype-controls button {
  border-radius: var(--brand-radius);
  font-family: var(--brand-mono);
  min-height: 50px;
}

.flagship-case .prototype-stage {
  background-color: var(--case-panel);
}

.flagship-case .metric {
  backdrop-filter: blur(10px);
  border-color: color-mix(in srgb, var(--case-accent) 22%, transparent);
  border-radius: var(--brand-radius);
  min-height: 130px;
  position: relative;
}

.flagship-case .metric::after {
  background: var(--case-accent);
  bottom: 12px;
  content: "";
  height: 3px;
  opacity: .75;
  position: absolute;
  right: 12px;
  width: 18px;
}

.flagship-case .metric span,
.flagship-case .metric em,
.flagship-case .prototype-panel__header {
  font-family: var(--brand-mono);
}

.flagship-case .journey-track article {
  min-height: 138px;
}

.flagship-case .journey-track article::before {
  border: 3px solid var(--case-panel);
  height: .85rem;
  width: .85rem;
}

.flagship-case .scope-note {
  border-left-width: 1px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  padding: 1.2rem 1.4rem;
}

.flagship-case .case-insight-map {
  counter-reset: insight;
}

.flagship-case .case-insight-map article {
  counter-increment: insight;
  overflow: hidden;
  position: relative;
}

.flagship-case .case-insight-map article::after {
  color: color-mix(in srgb, var(--case-accent) 12%, transparent);
  content: "0" counter(insight);
  font: 800 5rem/1 var(--brand-display);
  position: absolute;
  right: .6rem;
  top: .2rem;
}

.flagship-case .source-credit {
  font-family: var(--brand-mono);
}

.brand-intro {
  align-items: center;
  background: var(--case-bg);
  display: flex;
  inset: 0;
  justify-content: center;
  opacity: 1;
  position: fixed;
  transition: opacity .6s ease, visibility .6s step-end;
  visibility: visible;
  z-index: 9999;
}

.brand-intro.is-complete {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.brand-intro__inner {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: center;
}

.brand-intro__inner img {
  animation: intro-mark 1s cubic-bezier(.2, .8, .2, 1) both;
  filter: drop-shadow(0 14px 38px color-mix(in srgb, var(--case-accent) 28%, transparent));
  height: 104px;
  object-fit: contain;
  width: 104px;
}

.brand-intro__line {
  background: linear-gradient(90deg, transparent, var(--case-accent), transparent);
  height: 1px;
  overflow: hidden;
  position: relative;
  width: min(280px, 56vw);
}

.brand-intro__line::after {
  animation: intro-scan 1s .15s ease both;
  background: var(--case-ink);
  content: "";
  inset: 0;
  position: absolute;
  transform: translateX(-100%);
}

.brand-intro__inner span {
  animation: intro-copy .6s .25s ease both;
  color: var(--case-muted);
  font: 700 .66rem/1 var(--brand-mono);
  letter-spacing: .2em;
  text-transform: uppercase;
}

@keyframes intro-mark {
  from { opacity: 0; transform: scale(.82) translateY(14px); }
}

@keyframes intro-scan {
  to { transform: translateX(100%); }
}

@keyframes intro-copy {
  from { opacity: 0; transform: translateY(6px); }
}

.flagship-case [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .72s ease, transform .72s cubic-bezier(.2, .7, .2, 1);
}

.flagship-case [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 980px) {
  .flagship-case .case-hero::before {
    inset: 164px 12px 28px;
  }

  .flagship-case .case-hero::after {
    left: 36px;
    top: 164px;
  }

  .flagship-case .case-wordmark {
    margin-bottom: 18px;
  }

  .flagship-case .case-status {
    margin-top: 24px;
  }

  .brand-signature {
    grid-template-columns: 1fr;
  }

  .brand-signature__logo {
    max-width: 720px;
  }

  .flagship-case .flagship-section::before {
    display: none;
  }
}

@media (max-width: 680px) {
  .flagship-case .case-hero::before {
    inset: 188px 8px 22px;
  }

  .flagship-case .case-hero::after {
    left: 30px;
    top: 188px;
    width: 36px;
  }

  .flagship-case .case-hero-content::before {
    left: 28px;
  }

  .flagship-case .case-wordmark__asset {
    height: 44px;
    width: 44px;
  }

  .flagship-case .flagship-strip article {
    min-height: 104px;
  }

  .brand-signature__logo {
    min-height: 150px;
  }

  .brand-signature__palette {
    flex-wrap: wrap;
    padding-bottom: 1.2rem;
  }

  .flagship-case .case-insight-map article {
    min-height: 150px !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .brand-intro { display: none; }
  .flagship-case .case-status::before,
  .brand-intro__inner img,
  .brand-intro__line::after,
  .brand-intro__inner span { animation: none; }
  .flagship-case [data-reveal] { opacity: 1; transform: none; transition: none; }
  .flagship-case .case-hero-image > img { scale: 1; transition: none; }
}