/* Portfolio: minimal, accessible, responsive */

:root {
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 52rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --radius: 0.5rem;
  --radius-lg: 0.75rem;
  --transition: 150ms ease;

  --bg: #f7f5f0;
  --bg-elevated: #fffcf7;
  --text: #1c1917;
  --text-muted: #57534e;
  --border: #e7e5e0;
  --accent: #5c6b52;
  --accent-hover: #4a5743;
  --focus-ring: #5c6b52;
  --header-bg: rgba(247, 245, 240, 0.92);
  --shadow: 0 1px 3px rgba(28, 25, 23, 0.06);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: light;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

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

a:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius);
  z-index: 100;
}

.skip-link:focus {
  top: var(--space-md);
}

/* Header & nav */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
}

.site-logo {
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
}

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

/* Layout */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-2xl);
}

.section {
  padding-top: var(--space-2xl);
}

.section h2 {
  margin: 0 0 var(--space-sm);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0 0 var(--space-xl);
  color: var(--text-muted);
  max-width: 36rem;
}

/* About */

.about-media {
  display: flex;
  justify-content: center;
  margin: 0 0 var(--space-lg);
}

.eyebrow {
  margin: 0 0 var(--space-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.about h1 {
  margin: 0 0 var(--space-md);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.contact-line {
  margin: 0 0 var(--space-md);
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.contact-sep {
  margin: 0 0.35em;
}

.lead {
  margin: 0 0 var(--space-xl);
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 40rem;
}

.profile-photo {
  width: 10rem;
  height: 10rem;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid var(--border);
}

@media (min-width: 36rem) {
  .about-inner {
    position: relative;
    padding-right: calc(10rem + var(--space-xl));
  }

  .about-media {
    position: absolute;
    top: 0;
    right: 0;
    margin: 0;
  }
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

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

/* Section collapse (content under h2) */

.section-collapse {
  margin-top: calc(-1 * var(--space-xs));
}

.section-collapse-summary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin: 0 0 var(--space-xl);
  padding: 0;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color var(--transition);
}

.section-collapse-summary::-webkit-details-marker {
  display: none;
}

.section-collapse-summary:hover,
.section-collapse-summary:hover .section-collapse-chevron {
  color: var(--accent);
  border-color: var(--accent);
}

.section-collapse-summary:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius);
}

.section-collapse-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.75rem;
  line-height: 1;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  transition: transform var(--transition), color var(--transition), border-color var(--transition);
}

.section-collapse-chevron::before {
  content: "▼";
  display: block;
  transform: scaleY(0.75);
}

.section-collapse[open] .section-collapse-chevron {
  transform: rotate(180deg);
}

.section-collapse-panel {
  margin-top: 0;
}

/* Skills */

.skills-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 40rem) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.skills-category h3 {
  margin: 0 0 var(--space-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.skills-category .tags {
  margin: 0;
}

/* Experience */

.experience-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.experience-item {
  padding: var(--space-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border-left: 3px solid var(--accent);
}

.experience-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-md) var(--space-xl);
  margin-bottom: var(--space-md);
}

.experience-role {
  margin: 0 0 var(--space-xs);
  font-size: 1.125rem;
  font-weight: 600;
}

.experience-company {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}

.experience-company a {
  text-decoration: none;
}

.experience-company a:hover {
  text-decoration: underline;
}

.experience-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-xs);
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: left;
}

@media (min-width: 40rem) {
  .experience-meta {
    align-items: flex-end;
    text-align: right;
  }
}

.experience-dates {
  font-weight: 500;
  white-space: nowrap;
}

.experience-location::before {
  content: "· ";
}

.experience-blurb {
  margin: 0 0 var(--space-md);
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.experience-card-actions {
  margin-bottom: var(--space-md);
}

.experience-item .tags {
  margin-bottom: 0;
}

.story-chapter {
  margin-bottom: var(--space-xl);
}

.story-chapter:last-child {
  margin-bottom: 0;
}

.story-chapter-title {
  margin: 0 0 var(--space-sm);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.story-chapter p {
  margin: 0 0 var(--space-md);
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.story-chapter p:last-child {
  margin-bottom: 0;
}

/* Project filters */

.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.tag-filter {
  padding: 0.375rem 0.75rem;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.tag-filter:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tag-filter.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.tag-filter:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.projects-status {
  margin: 0 0 var(--space-lg);
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.projects-status code {
  font-size: 0.875em;
  padding: 0.1em 0.35em;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
}

/* Project cards */

.card-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

@media (min-width: 36rem) {
  .project-card {
    flex-direction: row;
    align-items: stretch;
  }
}

.project-card-media {
  flex-shrink: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

@media (min-width: 36rem) {
  .project-card-media {
    flex: 0 0 min(16rem, 36%);
    aspect-ratio: auto;
    align-self: stretch;
    min-height: 11rem;
    border-bottom: none;
    border-right: 1px solid var(--border);
  }
}

.project-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  padding: var(--space-lg);
}

.project-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
  font-weight: 600;
}

.project-card p {
  margin: 0 0 var(--space-md);
  flex: 1;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin: 0 0 var(--space-md);
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.project-card-actions {
  margin-top: auto;
  padding-top: var(--space-sm);
}

.btn-details {
  width: 100%;
  justify-content: center;
  cursor: pointer;
}

@media (min-width: 36rem) {
  .btn-details {
    width: auto;
  }
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-sm);
  font-size: 0.875rem;
  font-weight: 500;
}

.card-links a {
  text-decoration: none;
}

.card-links a:hover {
  text-decoration: underline;
}

/* Project detail modal */

body.modal-open,
body.lightbox-open {
  overflow: hidden;
}

.project-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
  max-width: none;
  max-height: none;
  width: 100%;
  height: 100%;
}

.project-modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(28, 25, 23, 0.45);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-height: 90vh;
  overflow: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: 0 -4px 24px rgba(28, 25, 23, 0.12);
}

@media (min-width: 40rem) {
  .project-modal {
    align-items: center;
    padding: var(--space-lg);
  }

  .modal-panel {
    max-width: 36rem;
    max-height: 85vh;
    border-radius: var(--radius-lg);
  }
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-elevated);
}

.modal-header h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text);
  border-color: var(--accent);
}

.modal-body {
  padding: var(--space-lg);
}

.project-modal-blurb {
  margin: 0 0 var(--space-md);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
}

.project-modal-description p {
  margin: 0 0 var(--space-md);
  color: var(--text-muted);
}

.project-modal-description p:last-child {
  margin-bottom: var(--space-lg);
}

.project-modal-links {
  margin-top: var(--space-lg);
}

.project-gallery {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.project-gallery-item {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.gallery-expand-btn {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  cursor: zoom-in;
}

.gallery-expand-btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.project-gallery-item img,
.project-gallery-item video {
  display: block;
  width: 100%;
}

.project-gallery-item .gallery-expand-btn img {
  pointer-events: none;
}

.project-gallery-item figcaption {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  border-top: 1px solid var(--border);
}

.project-pipeline {
  margin: 0;
}

.project-pipeline-title {
  margin: 0 0 var(--space-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
}

.project-pipeline-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
  gap: var(--space-sm);
}

.project-pipeline-steps .project-gallery-item {
  margin: 0;
}

.project-pipeline-steps .project-gallery-item img {
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--bg);
}

/* Gallery full-screen lightbox */

.gallery-lightbox {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.gallery-lightbox[hidden] {
  display: none;
}

.gallery-lightbox-backdrop {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  border: none;
  background: rgba(28, 25, 23, 0.92);
  cursor: zoom-out;
}

.gallery-lightbox-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin: 0;
  padding: 0;
  font-size: 1.75rem;
  line-height: 1;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  cursor: pointer;
}

.gallery-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.gallery-lightbox-figure {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  max-width: min(96vw, 72rem);
  max-height: 96vh;
  margin: 0;
}

.gallery-lightbox-figure img {
  max-width: 100%;
  max-height: calc(96vh - 3rem);
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.gallery-lightbox-figure figcaption {
  margin: 0;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
}

/* Learning */

.learning-groups {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.learning-group h3 {
  margin: 0 0 var(--space-md);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.learning-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.learning-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.learning-topic {
  font-weight: 600;
}

.learning-note {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.learning-item a {
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  margin-top: var(--space-xs);
}

.learning-item a:hover {
  text-decoration: underline;
}

/* Footer */

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  border-top: 1px solid var(--border);
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.site-footer a {
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}