/*
  PROJECT PAGE STYLES
  Cards, grids, hero sections, architecture diagrams, feature grids.
  Used by index.html and all projects/*.html pages.
*/

/* === INDEX: HERO === */
.hero-section {
  text-align: center;
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--fluid-space-lg) var(--fluid-space);
  position: relative;
}

.hero-title {
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 300;
  letter-spacing: var(--fluid-tracking-xl);
  text-transform: uppercase;
  margin: var(--fluid-space-sm) 0;
  line-height: var(--line-tight);
  color: var(--color-text);
}

.hero-tagline {
  font-size: clamp(16px, 2.5vw, 24px);
  font-weight: 300;
  color: var(--color-text-secondary);
  font-style: italic;
  line-height: var(--line-relaxed);
  max-width: 800px;
  margin: var(--fluid-space) auto;
  letter-spacing: 0.5px;
}

.hero-ctas {
  display: flex;
  gap: var(--fluid-gap);
  margin-top: var(--fluid-space-md);
  flex-wrap: wrap;
  justify-content: center;
}

.cta-primary,
.cta-secondary {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-body);
  padding: 16px 32px;
  min-height: 44px;
  min-width: 44px;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: var(--fluid-tracking-sm);
  border-radius: 4px;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
  cursor: pointer;
  border: 2px solid var(--color-accent);
}

.cta-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 500;
}

.cta-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(212, 184, 150, 0.3);
}

.cta-secondary {
  background: transparent;
  color: var(--color-accent);
}

.cta-secondary:hover {
  background: var(--color-accent-dim);
  transform: translateY(-2px);
}

/* === INDEX: FEATURED CARDS === */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--fluid-gap);
  margin-bottom: var(--fluid-space);
}

.featured-card {
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-card));
  border: var(--fluid-border-thin) solid var(--color-border);
  padding: var(--fluid-space);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  min-height: 400px;
  touch-action: manipulation;
}

.featured-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(to right, var(--color-accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.featured-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.5);
}

.featured-card:hover::before {
  transform: scaleX(1);
}

.featured-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.card-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-tiny);
  color: var(--color-accent);
  letter-spacing: var(--fluid-tracking-md);
  text-transform: uppercase;
  margin-bottom: 12px;
  opacity: 0.9;
}

.card-title {
  font-size: var(--fluid-title-md);
  font-weight: 400;
  letter-spacing: var(--fluid-tracking-sm);
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--color-text);
}

.card-description {
  font-size: var(--fluid-body);
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: var(--line-loose);
  letter-spacing: 0.3px;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.card-link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-eyebrow);
  color: var(--color-accent);
  letter-spacing: var(--fluid-tracking-sm);
  text-transform: uppercase;
  margin-top: auto;
  transition: transform var(--transition-base);
}

.featured-card:hover .card-link {
  transform: translateX(4px);
}

/* === INDEX: PROJECT GRID === */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--fluid-gap-sm);
  margin-bottom: var(--fluid-space-md);
}

.project-card {
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-card));
  border: var(--fluid-border-thin) solid var(--color-border);
  padding: var(--fluid-space-sm);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  min-height: 280px;
  touch-action: manipulation;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-accent);
  transform: scaleY(0);
  transition: transform var(--transition-base);
}

.project-card:hover {
  border-color: var(--color-accent);
  transform: translateX(4px);
}

.project-card:hover::before {
  transform: scaleY(1);
}

.project-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.project-card .card-description {
  font-size: var(--fluid-small);
}

.corner-accent {
  position: absolute;
  bottom: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-bottom: var(--fluid-border) solid var(--color-border-strong);
  border-right: var(--fluid-border) solid var(--color-border-strong);
  transition: border-color var(--transition-base);
}

.project-card:hover .corner-accent {
  border-color: var(--color-accent);
}

/* === INDEX: ABOUT SECTION === */
.about-section {
  max-width: 800px;
  margin: var(--fluid-space-lg) auto;
  text-align: center;
}

.about-text {
  font-size: var(--fluid-body);
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: var(--line-loose);
  letter-spacing: 0.3px;
  margin-bottom: var(--fluid-space);
}

/* === INDEX: STATS BAR === */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: var(--fluid-gap-lg);
  padding: var(--fluid-space);
  background: linear-gradient(to bottom, var(--color-bg-elevated), var(--color-bg));
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: var(--fluid-space-md);
}

.stat {
  text-align: center;
}

.stat-value {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-title-md);
  color: var(--color-accent);
  font-weight: 300;
}

.stat-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-tiny);
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: var(--fluid-tracking-sm);
  margin-top: 8px;
}

/* === TAG LIST (hero wrapper) === */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

/* === PROJECT PAGE: HERO === */
.project-hero {
  text-align: center;
  padding: var(--fluid-space-xl) var(--fluid-space) var(--fluid-space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.project-hero .eyebrow {
  margin-bottom: var(--fluid-space-xs);
}

.project-hero h1 {
  font-size: var(--fluid-title-xl);
  font-weight: 300;
  letter-spacing: var(--fluid-tracking-xl);
  text-transform: uppercase;
  margin-bottom: var(--fluid-space-xs);
  line-height: var(--line-tight);
}

.project-hero .tagline {
  font-size: clamp(16px, 2.5vw, 24px);
  color: var(--color-text-secondary);
  font-style: italic;
  line-height: var(--line-relaxed);
  margin-bottom: var(--fluid-space);
}

/* === PROJECT PAGE: SECTIONS === */
.project-section {
  max-width: 1100px;
  margin: 0 auto var(--fluid-space-lg);
  padding: 0 var(--fluid-space);
}

.project-section h2 {
  font-size: var(--fluid-title-lg);
  font-weight: 300;
  letter-spacing: var(--fluid-tracking-lg);
  text-transform: uppercase;
  margin-bottom: var(--fluid-space);
  color: var(--color-text);
}

.project-section p {
  font-size: var(--fluid-body);
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: var(--line-loose);
  letter-spacing: 0.3px;
  margin-bottom: var(--fluid-space-sm);
  max-width: 75ch;
}

/* === PROJECT PAGE: ARCHITECTURE DIAGRAM === */
.diagram-container {
  max-width: 1200px;
  margin: 0 auto var(--fluid-space-lg);
  padding: var(--fluid-space);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  position: relative;
}

.diagram-container svg {
  display: block;
  margin: 0 auto;
  min-width: 800px;
  width: 100%;
  height: auto;
}

.scroll-hint {
  display: none;
  text-align: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-tiny);
  color: var(--color-text-muted);
  margin-top: var(--fluid-space-xs);
}

/* === PROJECT PAGE: FEATURE GRID === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--fluid-gap);
  max-width: 1200px;
  margin: 0 auto var(--fluid-space-lg);
  padding: 0 var(--fluid-space);
}

.feature-card {
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-card));
  border: var(--fluid-border-thin) solid var(--color-border);
  padding: var(--fluid-space);
  min-height: 320px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-accent);
}

.feature-card h3 {
  font-size: var(--fluid-title-sm);
  font-weight: 400;
  letter-spacing: var(--fluid-tracking-sm);
  text-transform: uppercase;
  margin-bottom: var(--fluid-space-xs);
  color: var(--color-text);
}

.feature-card p {
  font-size: var(--fluid-body);
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: var(--line-relaxed);
  letter-spacing: 0.3px;
  flex-grow: 1;
}

.feature-metric {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-title-md);
  color: var(--color-accent);
  font-weight: 300;
  margin-bottom: 8px;
}

/* === PROJECT PAGE: HOW IT WORKS === */
.steps-list {
  max-width: 900px;
  margin: 0 auto var(--fluid-space-lg);
  padding: 0 var(--fluid-space);
  counter-reset: step;
}

.step-item {
  display: flex;
  gap: var(--fluid-gap);
  margin-bottom: var(--fluid-space);
  align-items: flex-start;
}

.step-number {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-title-md);
  color: var(--color-accent);
  font-weight: 300;
  min-width: 60px;
  text-align: center;
  line-height: 1;
  padding-top: 4px;
}

.step-content h3 {
  font-size: var(--fluid-title-sm);
  font-weight: 400;
  letter-spacing: var(--fluid-tracking-sm);
  text-transform: uppercase;
  margin-bottom: 8px;
  color: var(--color-text);
}

.step-content p {
  font-size: var(--fluid-body);
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: var(--line-loose);
  letter-spacing: 0.3px;
  max-width: 65ch;
}

/* === PROJECT PAGE: TECH STACK === */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--fluid-gap-sm);
}

.tech-item {
  padding: var(--fluid-space-sm);
  border: var(--fluid-border-thin) solid var(--color-border);
  text-align: center;
}

.tech-item h4 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-small);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: var(--fluid-tracking-sm);
  margin-bottom: 8px;
}

.tech-item p {
  font-size: var(--fluid-small);
  color: var(--color-text-muted);
}

/* === PROJECT PAGE: PREV/NEXT NAV === */
.project-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: var(--fluid-space-xl) auto var(--fluid-space-lg);
  padding: 0 var(--fluid-space);
  gap: var(--fluid-gap);
}

.project-nav a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-small);
  color: var(--color-text-muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: var(--fluid-tracking-sm);
  padding: 12px 20px;
  border: var(--fluid-border-thin) solid var(--color-border);
  transition: all var(--transition-base);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.project-nav a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.project-nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.project-nav .all-projects {
  color: var(--color-accent);
  border-color: var(--color-accent-border);
}

/* === PLAIN ENGLISH SECTION === */
.plain-english {
  max-width: 900px;
  margin: 0 auto var(--fluid-space-lg);
  padding: var(--fluid-space-md) var(--fluid-space);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  position: relative;
}

.plain-english::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--color-accent), transparent);
  border-radius: 12px 12px 0 0;
}

.plain-english h2 {
  font-size: var(--fluid-title-md);
  font-weight: 300;
  letter-spacing: var(--fluid-tracking-lg);
  text-transform: uppercase;
  margin-bottom: var(--fluid-space);
  color: var(--color-accent);
}

.plain-english-text {
  font-size: clamp(15px, 1.8vw, 20px);
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.8;
  letter-spacing: 0.3px;
  max-width: 65ch;
}

/* === SHOWCASE PAGE === */
.showcase-hero {
  text-align: center;
  padding: var(--fluid-space-xl) var(--fluid-space) var(--fluid-space);
}

.showcase-hero h1 {
  font-size: var(--fluid-title-xl);
  font-weight: 300;
  letter-spacing: var(--fluid-tracking-xl);
  text-transform: uppercase;
  margin-bottom: var(--fluid-space-xs);
  line-height: var(--line-tight);
}

.showcase-hero .tagline {
  font-size: clamp(16px, 2.5vw, 24px);
  color: var(--color-text-secondary);
  font-style: italic;
  line-height: var(--line-relaxed);
}

.showcase-count {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-title-md);
  color: var(--color-accent);
  font-weight: 300;
  margin-bottom: var(--fluid-space-xs);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 1200px;
  margin: 0 auto var(--fluid-space-md);
  padding: 0 var(--fluid-space);
}

.filter-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-tiny);
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 10px 20px;
  min-height: 44px;
  border-radius: 4px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all var(--transition-base);
}

.filter-btn:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
}

.filter-btn.active {
  color: var(--color-bg);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.filter-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: var(--fluid-gap);
  max-width: 1400px;
  margin: 0 auto var(--fluid-space-lg);
  padding: 0 var(--fluid-space);
}

.showcase-card {
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-card));
  border: var(--fluid-border-thin) solid var(--color-border);
  padding: var(--fluid-space);
  min-height: 320px;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base),
              opacity 0.3s ease,
              transform 0.3s ease;
  touch-action: manipulation;
}

.showcase-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(to right, var(--color-accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.showcase-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.5);
}

.showcase-card:hover::before {
  transform: scaleX(1);
}

.showcase-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.showcase-card.hidden {
  opacity: 0;
  transform: scale(0.95);
}

.showcase-card .card-title {
  margin-bottom: 12px;
}

.showcase-card .card-description {
  margin-bottom: 16px;
}

.showcase-card:hover .card-link {
  transform: translateX(4px);
}

/* === DIAGRAM UPGRADES === */
.diagram-caption {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--fluid-tiny);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--fluid-space-xs);
  letter-spacing: 0.5px;
}

/* === RESPONSIVE === */

@media (max-width: 1024px) {
  .hero-section {
    min-height: 50vh;
    padding: var(--fluid-space) 24px;
  }

  .hero-title {
    font-size: clamp(42px, 7vw, 72px);
  }

  .featured-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }

  .featured-card {
    min-height: 350px;
  }

  .feature-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }

  .feature-card {
    min-height: 280px;
  }

  .stats-bar {
    gap: var(--fluid-gap);
  }
}

@media (max-width: 768px) {
  .hero-section {
    min-height: 45vh;
    padding: var(--fluid-space-sm) 20px;
  }

  .hero-title {
    font-size: clamp(36px, 10vw, 56px);
  }

  .hero-tagline {
    font-size: clamp(14px, 3.5vw, 18px);
    padding: 0 10px;
  }

  .hero-ctas {
    flex-direction: column;
    width: 100%;
    gap: var(--fluid-gap-sm);
  }

  .cta-primary,
  .cta-secondary {
    width: 100%;
    max-width: 300px;
    padding: 14px 24px;
  }

  .featured-grid,
  .project-grid,
  .feature-grid {
    grid-template-columns: 1fr;
    gap: var(--fluid-gap-sm);
  }

  .featured-card {
    min-height: 300px;
    padding: var(--fluid-space-sm);
  }

  .feature-card {
    min-height: 240px;
  }

  .card-title {
    font-size: var(--fluid-title-sm);
  }

  .card-description {
    font-size: var(--fluid-eyebrow);
  }

  .stats-bar {
    flex-direction: column;
    gap: var(--fluid-gap-sm);
    padding: var(--fluid-space-sm) 20px;
  }

  .scroll-hint {
    display: block;
  }

  .project-nav {
    flex-direction: column;
    gap: var(--fluid-gap-sm);
  }

  .project-nav a {
    width: 100%;
    justify-content: center;
  }

  .step-item {
    flex-direction: column;
    gap: var(--fluid-gap-xs);
  }

  .step-number {
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .hero-section {
    min-height: 40vh;
  }

  .hero-title {
    font-size: clamp(32px, 12vw, 48px);
  }

  .featured-card {
    min-height: 260px;
  }

  .feature-card {
    min-height: 200px;
  }

  .card-tags {
    gap: 6px;
  }

  .tag {
    font-size: 12px;
    padding: 4px 10px;
  }
}

/* Showcase responsive */
@media (max-width: 1024px) {
  .showcase-grid {
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  }
}

@media (max-width: 768px) {
  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .showcase-card {
    min-height: 260px;
  }

  .filter-bar {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 14px;
    font-size: 11px;
  }

  .plain-english-text {
    font-size: var(--fluid-title-sm);
  }
}

@media (max-width: 480px) {
  .showcase-card {
    min-height: 220px;
  }
}

/* Touch enhancements */
@media (hover: none) and (pointer: coarse) {
  .featured-card:active {
    border-color: var(--color-accent);
    transform: translateY(-4px);
  }

  .featured-card:active::before {
    transform: scaleX(1);
  }

  .project-card:active {
    border-color: var(--color-accent);
    transform: translateX(4px);
  }

  .project-card:active::before {
    transform: scaleY(1);
  }

  .cta-primary:active {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
  }

  .cta-secondary:active {
    background: var(--color-accent-dim);
    transform: translateY(-2px);
  }
}