/* Foro portfolio — Design system */
:root {
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-nav-size: 0.9rem;
  --text-base: 1rem;
  --text-xl: 1.5rem;
  --text-hero: 2.5rem;
  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --space-2: 0.5rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --content-max: 960px;
  --radius-full: 50%;
  --radius-lg: 12px;
}

:root,
[data-theme="light"] {
  --bg-primary: #FFFFFF;
  --bg-secondary: #f5f5f5;
  --text-primary: #000000;
  --nav-color: #666666;
  --text-footer: #AAAAAA;
  --border: rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #1a1a1a;
  --text-primary: #FFFFFF;
  --nav-color: #BBBBBB;
  --text-footer: #CCCCCC;
  --border: rgba(255, 255, 255, 0.08);
}

.block-purple { background-color: #5B42D1; }
.block-yellow { background-color: #F9D05F; }
.block-pink   { background-color: #EF5B76; }
.block-orange { background-color: #F49F60; }
.block-blue   { background-color: #9ED3D7; }

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.9; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-8) var(--space-6);
  max-width: var(--content-max);
  margin: 0 auto;
}

.logo {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav a {
  font-size: var(--text-nav-size);
  font-weight: 400;
  color: var(--nav-color);
}

.nav a:hover { color: var(--text-primary); }

/* Burger button — hidden on desktop */
.burger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
}

.burger-line {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  margin: 0 auto;
  transition: transform 0.2s, opacity 0.2s;
}

.burger-btn[aria-expanded="true"] .burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.burger-btn[aria-expanded="true"] .burger-line:nth-child(2) {
  opacity: 0;
}
.burger-btn[aria-expanded="true"] .burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
}

.theme-toggle:hover { background: var(--border); }

.theme-icon { font-size: 1.125rem; }
[data-theme="light"] .theme-icon.moon { display: none; }
[data-theme="dark"] .theme-icon.sun { display: none; }

/* Hero — single avatar (light or dark) */
.hero {
  padding: var(--space-20) var(--space-6) var(--space-20);
  max-width: var(--content-max);
  margin: 0 auto;
  text-align: center;
}

.hero-avatar {
  position: relative;
  width: 180px;
  aspect-ratio: 279 / 274;
  margin: 0 auto var(--space-8);
}

.hero-photo {
  display: block;
  width: 100%;
  height: auto;
}

.hero-photo-light { display: block; }
.hero-photo-dark { display: none; }
[data-theme="dark"] .hero-photo-light { display: none; }
[data-theme="dark"] .hero-photo-dark { display: block; }

.hero-title {
  font-size: var(--text-hero);
  font-weight: 700;
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-4);
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}

.hero-desc {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  max-width: 42ch;
  margin: 0 auto;
  color: var(--text-primary);
}

.hero-desc strong { font-weight: 700; }

.hero-contact {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin: var(--space-8) 0 0;
}

.hero-contact a {
  color: var(--nav-color);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}

.hero-contact a:hover { color: var(--text-primary); }

/* Section — no underlines */
.section {
  padding: 0 var(--space-6) var(--space-20);
  max-width: var(--content-max);
  margin: 0 auto;
}

.work { padding-top: var(--space-16); }

.section-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--nav-color);
  margin: 0 0 var(--space-6);
  border: none;
}

/* Portfolio grid — cards */
.portfolio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

/* Portfolio covers — photo inside frame with top spacing (frame = same color as card background) */
.portfolio-cover {
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.2s;
}

a.portfolio-cover:hover { transform: translateY(-2px); }

.portfolio-cover img {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: middle;
}

/* Card + frame background per project (match each cover photo’s background) */
.portfolio-grid-stacked .portfolio-cover-top,
.portfolio-grid-stacked .portfolio-cover-bottom { grid-column: 1 / -1; }

/* About (homepage block — kept for any reuse) */
.about { padding-bottom: var(--space-20); }
.about-content { max-width: 48ch; }
.about-text {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  margin: 0 0 var(--space-6);
}
.about-text a { text-decoration: underline; color: var(--text-primary); }
.about-text a:hover { opacity: 0.8; }
.about-cta {
  display: inline-block;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  padding: var(--space-4) var(--space-6);
  border: 2px solid var(--text-primary);
  border-radius: 9999px;
  transition: background 0.2s, color 0.2s;
  margin-top: var(--space-8);
}
.about-cta:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
}

.about-ctas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.about-ctas .about-cta { margin-top: 0; }

.about-cta-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}

.about-cta-icon svg {
  flex-shrink: 0;
}

/* About page — centered, same margins as homepage (.section) */
.about-page {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-6) var(--space-20);
  text-align: center;
}
.about-page-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}
.about-page-hero {
  padding: var(--space-20) var(--space-6) var(--space-12);
  max-width: var(--content-max);
  margin: 0 auto;
  text-align: center;
}
.about-page-hero .about-page-kicker { color: var(--text-primary); }
.about-page-photo-wrap {
  width: 200px;
  aspect-ratio: 279 / 274;
  margin: 0 auto var(--space-8);
}
.about-page-photo {
  width: 100%;
  height: auto;
}
.about-page-kicker {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  font-weight: 500;
}
.about-page-hero + .about-page-body { margin-top: 0; }
.about-photo {
  margin: 0 auto var(--space-12);
}
.about-photo-frame {
  position: relative;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 0 auto var(--space-4);
}
.about-photo-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.about-photo-light { display: block; }
.about-photo-dark { display: none; }
[data-theme="dark"] .about-photo-light { display: none; }
[data-theme="dark"] .about-photo-dark { display: block; }
.about-photo-caption {
  font-size: var(--text-sm);
  color: var(--nav-color);
  margin: 0;
}
.about-page-body {
  max-width: 48ch;
  margin: 0 auto;
  text-align: center;
}
.about-page-body .about-text:last-of-type { margin-bottom: 0; }
.about-page-body .about-cta { margin-left: auto; margin-right: auto; }
.nav a.nav-current {
  font-weight: 600;
  color: var(--text-primary);
}
.nav a.nav-current:hover { color: var(--text-primary); opacity: 1; }

/* Footer — no extra lines */
.site-footer {
  padding: var(--space-8) var(--space-6);
  max-width: var(--content-max);
  margin: 0 auto;
}

.site-footer:empty { min-height: 0; }

/* Case study page */
.case-study-main {
  padding: var(--space-12) var(--space-6) var(--space-20);
  max-width: var(--content-max);
  margin: 0 auto;
}

.case-study-article { max-width: 960px; margin: 0 auto; }

.case-study-header { margin-bottom: 2rem; }

.case-study-title {
  font-size: clamp(1.875rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  color: var(--text-primary);
  text-align: center;
}

.case-study-tagline {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  margin: 0;
  text-align: center;
}

.case-study-key-results-meta {
  margin-bottom: 4.25rem;
  text-align: left;
}

.case-study-key-results-meta .case-study-intro { margin-bottom: 0.4em; }
.case-study-key-results-meta .case-study-list {
  margin: 0 0 0 1.25rem;
  padding: 0;
  text-align: left;
}

.case-study-intro {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  margin: 0;
}

.case-study-figure { margin: 0 0 3.5rem; }
.case-study-hero-figure { margin-bottom: 2.5rem; }

.case-study-img-placeholder {
  width: 100%;
  min-height: 280px;
  aspect-ratio: 16 / 9;
  background: var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--nav-color);
  font-size: var(--text-sm);
}

.case-study-hero-figure .case-study-img-placeholder { aspect-ratio: 2 / 1; }

.case-study-fullwidth { max-width: 100%; }

.case-study-figure-zoom {
  overflow: hidden;
  border-radius: var(--radius-lg);
}
.case-study-figure-zoom .case-study-img {
  transform: scale(1.35);
  transform-origin: center center;
}

.case-study-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  vertical-align: middle;
  cursor: zoom-in;
}

/* Lightbox — open photos/videos, zoom in/out */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}
.lightbox-overlay.is-open {
  opacity: 1;
  visibility: visible;
}
.lightbox-media-wrap {
  max-width: 95vw;
  max-height: 95vh;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-origin: center center;
  transition: transform 0.2s ease;
}
.lightbox-overlay img,
.lightbox-overlay video {
  max-width: 95vw;
  max-height: 95vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-lg);
  cursor: grab;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}
.lightbox-overlay video {
  cursor: grab;
}
.lightbox-overlay img:active,
.lightbox-overlay video:active { cursor: grabbing; }
.lightbox-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}
.lightbox-zoom-btn {
  position: absolute;
  width: 44px;
  height: 44px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  line-height: 1;
}
.lightbox-zoom-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}
.lightbox-zoom-in { bottom: var(--space-4); right: 60px; }
.lightbox-zoom-out { bottom: var(--space-4); right: var(--space-4); }


.case-study-video {
  width: 100%;
  min-height: 320px;
  max-height: 85vh;
  display: block;
  border-radius: var(--radius-lg);
  background: #000;
  cursor: pointer;
}
.case-study-figcaption {
  font-size: var(--text-sm);
  color: var(--nav-color);
  margin: var(--space-2) 0 0;
}

.case-study-outro {
  font-size: var(--text-base);
  color: var(--text-primary);
  margin: 4rem 0 0;
  text-align: center;
}
.case-study-outro a { text-decoration: underline; font-weight: 600; }

.case-study-prototype-link {
  display: inline-block;
  font-size: 1.1rem;
  font-weight: 600;
  color: #2563EB;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.2s, color 0.2s;
}
.case-study-prototype-link:hover { opacity: 0.85; color: #1d4ed8; }
[data-theme="dark"] .case-study-prototype-link { color: #60a5fa; }
[data-theme="dark"] .case-study-prototype-link:hover { color: #93c5fd; }

.case-study-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: 2.5rem;
}

@media (max-width: 640px) {
  .case-study-meta { grid-template-columns: 1fr; }
}

.case-study-meta-label {
  font-size: var(--text-base);
  font-weight: 600;
  margin: 0 0 var(--space-2);
}
.case-study-meta-text {
  font-size: var(--text-base);
  color: var(--nav-color);
  margin: 0;
}

.case-study-meta-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-base);
  color: var(--nav-color);
  line-height: 1.5;
}
.case-study-meta-list li {
  margin: 0 0 0.25rem;
  padding: 0;
}
.case-study-meta-list li::before {
  content: "• ";
  font-weight: 600;
}

.case-study-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 4rem 0;
}

.case-study-heading {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 4rem 0 1.5rem;
  color: var(--text-primary);
  text-align: left;
}

.case-study-section:first-of-type .case-study-heading { margin-top: 0; text-align: left; }

.case-study-subheading {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 3rem 0 1.25rem;
  color: var(--text-primary);
}

.case-study-body {
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--text-primary);
  margin: 0 0 2rem;
}
/* Tighter spacing after bold subheading-style lines (e.g. "Managing Complexity") */
.case-study-body:has(> strong:only-child) {
  margin-bottom: 0.75rem;
}

/* Balanced spacing: intro + list — small gap, not cramped */
.case-study-list-block .case-study-body,
.case-study-body:has(+ .case-study-list) {
  margin-bottom: 0.4em;
}
.case-study-list-block .case-study-list,
.case-study-body + .case-study-list {
  margin-top: 0;
  padding-top: 0;
}

.case-study-list {
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--text-primary);
  margin: 0 0 2rem;
  padding-left: 1.25rem;
  margin-top: 0;
}

.case-study-list li { margin-bottom: 0.75rem; }

@media (max-width: 768px) {
  .site-header { padding: var(--space-4); }
  .hero { padding: var(--space-12) var(--space-6); }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 1.25rem; }
  .hero-desc {
    margin-left: var(--space-4);
    margin-right: var(--space-4);
    max-width: none;
  }
  .section { padding-left: var(--space-4); padding-right: var(--space-4); }
  .portfolio-grid { grid-template-columns: 1fr; }
  .site-footer { padding: var(--space-6) var(--space-4); }

  /* Burger menu — name left, theme + burger right, nav links in dropdown */
  .site-header { position: relative; z-index: 100; }
  .nav-links { z-index: 101; }
  .nav { flex: 1; justify-content: flex-end; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4);
    margin: 0 calc(-1 * var(--space-4));
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
  }
  [data-theme="dark"] .nav-links { box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3); }
  .site-header.is-menu-open::before {
    content: "";
    position: fixed;
    inset: 0;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    background: rgba(255, 255, 255, 0.6);
    z-index: -1;
  }
  [data-theme="dark"] .site-header.is-menu-open::before {
    background: rgba(0, 0, 0, 0.2);
  }
  .site-header.is-menu-open .nav-links {
    display: flex;
  }
  .nav-links a {
    padding: var(--space-4);
    font-size: var(--text-base);
    border-bottom: 1px solid var(--border);
  }
  .nav-links a:last-child { border-bottom: none; }
  .burger-btn { display: flex; }

  /* Portfolio covers — same-size boxes on mobile (match home & trust) */
  .portfolio-cover {
    aspect-ratio: 4 / 3;
    position: relative;
  }
  .portfolio-cover img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
}