/* ==========================================================================
   Biggest Manuel — Case Study Page Stylesheet
   Modern, Ultra-Crisp, High-Performance CSS (Light & Dark Theme)
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;600;700;800&family=JetBrains+Mono:wght@500;600&display=swap");

:root {
  /* Light Theme */
  --case-bg: #f8fafc;
  --case-surface: #ffffff;
  --case-surface-2: #f1f5f9;
  --case-surface-hover: #e2e8f0;
  --case-text: #0f172a;
  --case-muted: #475569;
  --case-subtle: #94a3b8;
  --case-border: #e2e8f0;
  --case-border-strong: #cbd5e1;
  --case-accent: #7c3aed;
  --case-accent-2: #0284c7;
  --case-accent-soft: rgba(124, 58, 237, 0.1);
  --case-accent-gradient: linear-gradient(135deg, #7c3aed 0%, #0284c7 100%);
  --case-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --case-max: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

body.dark {
  /* Dark Theme */
  --case-bg: #090d15;
  --case-surface: #0f1728;
  --case-surface-2: #131d31;
  --case-surface-hover: #1c2a45;
  --case-text: #f8fafc;
  --case-muted: #94a3b8;
  --case-subtle: #64748b;
  --case-border: rgba(255, 255, 255, 0.08);
  --case-border-strong: rgba(255, 255, 255, 0.16);
  --case-accent: #8b5cf6;
  --case-accent-2: #22d3ee;
  --case-accent-soft: rgba(139, 92, 246, 0.14);
  --case-accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #22d3ee 100%);
  --case-shadow: 0 28px 80px rgba(0, 0, 0, 0.4);
}

html {
  scroll-behavior: smooth;
  background: var(--case-bg);
}

body.case-study-page {
  margin: 0;
  min-height: 100vh;
  background-color: var(--case-bg);
  background-image:
    radial-gradient(circle at 18% 10%, rgba(139, 92, 246, 0.12), transparent 30%),
    radial-gradient(circle at 85% 18%, rgba(34, 211, 238, 0.08), transparent 28%);
  color: var(--case-text);
  font-family: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.case-shell {
  width: min(var(--case-max), calc(100% - 36px));
  margin: 0 auto;
}

/* --- Topbar --- */
.case-topbar {
  position: sticky;
  top: 18px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--case-max), calc(100% - 36px));
  margin: 18px auto 0;
  padding: 12px 20px;
  border: 1px solid var(--case-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--case-surface) 80%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--case-shadow);
}

.case-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.1rem;
}

.brand-logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--case-accent-gradient);
  color: #ffffff;
  display: grid;
  place-items: center;
}

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

.case-topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.case-theme-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--case-surface-2);
  border: 1px solid var(--case-border);
  color: var(--case-muted);
  transition: all 0.2s var(--ease);
}

.case-theme-btn:hover {
  color: var(--case-text);
  border-color: var(--case-border-strong);
  transform: translateY(-1px);
}

body.dark .sun-icon { display: block; }
body.dark .moon-icon { display: none; }
body:not(.dark) .sun-icon { display: none; }
body:not(.dark) .moon-icon { display: block; }

.case-nav-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--case-muted);
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--case-surface-2);
  border: 1px solid var(--case-border);
  transition: all 0.2s var(--ease);
}

.case-nav-back:hover {
  color: var(--case-text);
  border-color: var(--case-border-strong);
  transform: translateX(-2px);
}

/* --- Case Main Hero --- */
.case-main {
  padding: 40px 0 0;
}

.case-hero {
  padding: 60px 0 20px;
}

.case-hero-copy {
  max-width: 860px;
}

.case-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--case-muted);
  margin-bottom: 20px;
}

.case-breadcrumbs a:hover {
  color: var(--case-accent);
}

.case-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.case-tag,
.case-status,
.case-stack-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--case-border);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.case-tag {
  background: var(--case-accent-soft);
  border-color: rgba(139, 92, 246, 0.3);
  color: var(--case-accent);
  text-transform: uppercase;
}

.case-status {
  color: var(--case-muted);
  background: var(--case-surface-2);
}

.case-hero h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.8rem, 6.5vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}

.case-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.case-stack-pill {
  font-family: "JetBrains Mono", monospace;
  color: var(--case-muted);
  background: var(--case-surface-2);
  font-weight: 600;
}

.case-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.case-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.92rem;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.case-btn:hover {
  transform: translateY(-2px);
}

.case-btn-primary {
  background: var(--case-accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(139, 92, 246, 0.35);
}

.case-btn-primary:hover {
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.45);
}

.case-btn-outline {
  background: var(--case-surface);
  border: 1px solid var(--case-border-strong);
  color: var(--case-text);
}

.case-btn-outline:hover {
  border-color: var(--case-accent);
  color: var(--case-accent);
}

/* Hero Screenshot Window */
.case-hero-shot {
  margin-top: 50px;
}

.case-shot-window {
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid var(--case-border);
  background: var(--case-surface);
  box-shadow: var(--case-shadow);
  cursor: pointer;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.case-shot-window:hover {
  transform: translateY(-3px);
  border-color: var(--case-border-strong);
}

.case-window-bar {
  display: flex;
  gap: 7px;
  align-items: center;
  height: 40px;
  padding: 0 16px;
  border-bottom: 1px solid var(--case-border);
  background: var(--case-surface-2);
}

.case-window-bar span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--case-border-strong);
}

.case-shot-window img {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 8.5;
  object-fit: cover;
  object-position: top;
}

/* Problem & Approach Cards */
.case-copy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  padding: 80px 0 20px;
}

.case-copy-card {
  padding: 34px;
  border-radius: 22px;
  border: 1px solid var(--case-border);
  background: var(--case-surface);
  box-shadow: var(--case-shadow);
}

.case-copy-card-wide {
  grid-column: 1 / -1;
}

.case-eyebrow {
  margin: 0 0 10px;
  color: var(--case-accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  font-weight: 800;
}

.case-copy-card h2 {
  font-family: "Space Grotesk", sans-serif;
  margin: 0 0 16px;
  font-size: 1.7rem;
  letter-spacing: -0.03em;
}

.case-copy-card p:last-child {
  margin: 0;
  color: var(--case-muted);
  font-size: 1.02rem;
  line-height: 1.85;
}

/* Gallery Section */
.case-gallery {
  padding: 80px 0 20px;
}

.case-section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.case-section-heading h2 {
  font-family: "Space Grotesk", sans-serif;
  margin: 0 0 10px;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.04em;
}

.case-section-heading > p:last-child {
  margin: 0;
  color: var(--case-muted);
  font-size: 1.05rem;
}

.case-gallery-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.7fr);
  gap: 24px;
  align-items: start;
}

.case-gallery-frame {
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid var(--case-border);
  background: var(--case-surface);
  box-shadow: var(--case-shadow);
  cursor: pointer;
  transition: transform 0.25s var(--ease);
}

.case-gallery-frame:hover {
  transform: scale(1.02);
}

.case-gallery-item img {
  width: 100%;
  display: block;
}

.case-gallery-item.is-desktop img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top;
}

.case-gallery-item.is-mobile {
  width: min(100%, 340px);
  justify-self: center;
}

.case-gallery-item.is-mobile .case-gallery-frame {
  padding: 10px;
  border-radius: 36px;
  background: var(--case-surface-2);
}

.case-gallery-item.is-mobile img {
  aspect-ratio: 9 / 17.5;
  object-fit: cover;
  object-position: top;
  border-radius: 28px;
}

.case-gallery-item figcaption {
  margin-top: 12px;
  color: var(--case-muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Next / Prev Project Navigation */
.case-project-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 80px 0 20px;
  flex-wrap: wrap;
}

.project-nav-card {
  flex: 1;
  min-width: 260px;
  padding: 24px;
  border-radius: 20px;
  border: 1px solid var(--case-border);
  background: var(--case-surface);
  box-shadow: var(--case-shadow);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.25s var(--ease);
}

.project-nav-card:hover {
  border-color: var(--case-accent);
  transform: translateY(-3px);
}

.project-nav-label {
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--case-accent);
}

.project-nav-title {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
}

/* Final Call To Action */
.case-final-cta {
  margin: 40px 0 20px;
  padding: 50px 30px;
  text-align: center;
  border-radius: 26px;
  border: 1px solid var(--case-border);
  background:
    radial-gradient(circle at top, rgba(139, 92, 246, 0.15), transparent 60%),
    var(--case-surface);
  box-shadow: var(--case-shadow);
}

.case-final-cta h2 {
  font-family: "Space Grotesk", sans-serif;
  margin: 0 0 20px;
  font-size: clamp(2rem, 4vw, 3rem);
}

/* Footer */
.case-footer {
  padding: 60px 0 40px;
  color: var(--case-subtle);
  font-size: 0.84rem;
  text-align: center;
}

/* Image Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  place-items: center;
  padding: 20px;
}

.lightbox-modal:not([hidden]) {
  display: grid;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
}

.lightbox-content {
  position: relative;
  z-index: 10;
  max-width: min(1000px, 95vw);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
}

.lightbox-caption {
  margin-top: 12px;
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 600;
}

.lightbox-close-btn {
  position: absolute;
  top: -40px;
  right: 0;
  font-size: 2rem;
  color: #ffffff;
  line-height: 1;
}

/* Error State */
.case-error {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
}

/* Responsive */
@media (max-width: 860px) {
  .case-copy-grid,
  .case-gallery-grid {
    grid-template-columns: 1fr;
  }

  .case-gallery-item.is-mobile {
    justify-self: start;
    width: min(100%, 330px);
  }
}

@media (max-width: 640px) {
  .case-hero h1 {
    font-size: clamp(2.4rem, 12vw, 3.8rem);
  }

  .case-copy-card {
    padding: 24px;
  }
}