/* ==========================================================================
   Studio Paper — Matthew Buxton Portfolio
   A warm, editorial "Modern Renaissance" design system.
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  /* Surfaces */
  --surface: #faf9f8;
  --surface-lowest: #ffffff;
  --surface-low: #f4f3f3;
  --surface-container: #eeeeed;
  --surface-high: #e8e8e7;
  --surface-highest: #e3e2e2;

  /* Ink */
  --on-surface: #1a1c1c;
  --on-surface-variant: #414848;

  /* Outlines */
  --outline: #717878;
  --outline-variant: #c1c8c7;
  --border-subtle: #e5e3df;

  /* Brand */
  --primary: #012425;
  --on-primary: #ffffff;
  --primary-container: #1a3a3a;
  --secondary: #45636f;
  --chip-bg: #f0efef;

  /* Typography */
  --font-serif: "EB Garamond", "Times New Roman", Georgia, serif;
  --font-sans: "Hanken Grotesk", "Helvetica Neue", Arial, sans-serif;

  /* Layout */
  --container-max: 1200px;
  --gutter: 24px;
  --margin-mobile: 20px;
  --margin-desktop: 64px;

  /* Shape & depth */
  --radius-sm: 2px;   /* 0.125rem */
  --radius: 4px;      /* 0.25rem  */
  --radius-lg: 8px;   /* 0.5rem   */
  --shadow-ambient: 0 4px 12px rgba(0, 0, 0, 0.04);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--on-surface);
  background-color: var(--surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Subtle paper grain overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
}

::selection {
  background: var(--primary-container);
  color: #83a4a3;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

ul {
  list-style: none;
}

/* ---------- Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--margin-mobile);
  padding-right: var(--margin-mobile);
}

.label-caps {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1;
  text-transform: uppercase;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--margin-mobile);
  z-index: 200;
  padding: 12px 20px;
  background: var(--primary);
  color: var(--on-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  border-radius: var(--radius);
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 12px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1;
  padding: 16px 32px;
  border-radius: var(--radius);
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
  white-space: nowrap;
}

.btn-dark {
  background: var(--on-surface);
  color: var(--surface);
}
.btn-dark:hover {
  background: var(--on-surface-variant);
}

.btn-ghost {
  background: transparent;
  color: var(--on-surface-variant);
  padding-left: 8px;
  padding-right: 8px;
}
.btn-ghost:hover {
  color: var(--on-surface);
}
.btn-ghost .arrow {
  font-size: 18px;
  line-height: 1;
  transition: transform 0.15s ease;
}
.btn-ghost:hover .arrow {
  transform: translateX(4px);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.3s ease;
}
.site-header.is-scrolled {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gutter);
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}

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

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

.nav-link {
  position: relative;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  padding-bottom: 4px;
  transition: color 0.3s ease;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--primary);
  transition: width 0.3s ease, left 0.3s ease;
}
.nav-link:hover::after {
  width: 100%;
  left: 0;
}
.nav-link.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
  padding-bottom: 2px;
}
.nav-link.active::after {
  display: none;
}

.nav-cta {
  background: var(--on-surface);
  color: var(--surface);
  padding: 12px 24px;
}
.nav-cta:hover {
  background: var(--on-surface-variant);
}

.nav-cta-mobile {
  display: none;
}

/* Mobile hamburger (two bars) */
.nav-toggle {
  display: none;
  position: relative;
  width: 32px;
  height: 24px;
  background: transparent;
  border: 0;
  padding: 0;
}
.nav-toggle-bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--on-surface);
  border-radius: 1px;
  transition: transform 0.25s ease, top 0.25s ease;
}
.nav-toggle-bar:nth-child(1) {
  top: 5px;
}
.nav-toggle-bar:nth-child(2) {
  top: 17px;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  top: 11px;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  top: 11px;
  transform: rotate(-45deg);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 96px;
  padding-bottom: 96px;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gutter);
  align-items: center;
  width: 100%;
}

.hero-copy {
  max-width: 620px;
}

.display {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--on-surface);
  margin-bottom: 24px;
}
.display em {
  font-style: italic;
  color: var(--on-surface-variant);
}

.lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  max-width: 560px;
  margin-bottom: 48px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-portrait {
  display: flex;
  justify-content: center;
}

.portrait-frame {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 4 / 5;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 8px;
  background: var(--surface-lowest);
}
.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 4px);
  filter: grayscale(1);
  transition: filter 0.7s ease;
}
.portrait-frame:hover img {
  filter: grayscale(0);
}

.scroll-hint {
  position: absolute;
  left: var(--margin-mobile);
  bottom: 40px;
  display: flex;
  align-items: center;
  gap: 16px;
  opacity: 0.7;
}
.scroll-hint .label-caps {
  letter-spacing: 0.2em;
  color: var(--on-surface-variant);
}
.scroll-line {
  width: 48px;
  height: 1px;
  background: var(--outline-variant);
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section {
  position: relative;
  z-index: 1;
  padding: 96px 0;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.section-alt {
  background: var(--surface-low);
}

.section-topless {
  border-top: 0;
  padding-top: 0;
}

/* ---------- Sub-page header ---------- */
.page-main {
  position: relative;
  z-index: 1;
}

.page-head {
  padding: 96px 0 48px;
  max-width: 820px;
}
.page-head .display {
  margin-bottom: 24px;
}
.page-head .lead {
  margin-bottom: 0;
}

.section-block {
  margin-bottom: 96px;
}
.section-block:last-child {
  margin-bottom: 0;
}

.section-rule {
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  margin-bottom: 40px;
}
.section-rule .headline-sm {
  color: var(--primary);
}

/* ---------- Involvement page ---------- */
.inv-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gutter);
}

.inv-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
  margin-top: 16px;
}

.inv-card {
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.inv-card:hover {
  box-shadow: var(--shadow-ambient);
  transform: translateY(-2px);
}

.inv-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.inv-card-icon {
  width: 20px;
  height: 20px;
  color: var(--outline);
  flex-shrink: 0;
}

.inv-card-body h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--primary);
  margin-bottom: 8px;
}
.inv-card-body p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.inv-card-foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.inv-card-foot .label-caps {
  color: var(--outline);
}

.inv-small {
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.inv-small:hover {
  box-shadow: var(--shadow-ambient);
  transform: translateY(-2px);
}
.inv-small h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--primary);
  margin-bottom: 12px;
}
.inv-small p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.inv-list {
  border-top: 1px solid var(--border-subtle);
}
.inv-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-subtle);
}
.inv-list li:last-child {
  border-bottom: 0;
}
.inv-list .inv-name {
  font-size: 18px;
  color: var(--primary);
}

/* ---------- School reports ---------- */
.reports-block {
  margin-top: 96px;
}
.reports {
  border-top: 1px solid var(--border-subtle);
}
.report-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: padding-left 0.2s ease;
}
.report-row:hover {
  padding-left: 8px;
}
.report-sem {
  color: var(--on-surface-variant);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 8px;
}
.report-row h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--on-surface);
}
.report-btn {
  padding: 12px 24px;
  flex-shrink: 0;
}
.report-btn:hover {
  background: var(--on-surface-variant);
}

/* ---------- Passions: tile row ---------- */
.bento-tiles {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}
.bento-tile {
  min-width: 0;
}

/* ---------- Client websites (iframe showcase) ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
  align-items: start;
}

.projects-stack {
  grid-template-columns: 1fr;
  gap: 48px;
}
.projects-stack .project-frame iframe {
  height: 560px;
}

.project-card {
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow 0.3s ease;
}
.project-card:hover {
  box-shadow: var(--shadow-ambient);
}

.project-frame {
  position: relative;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface-lowest);
  margin-bottom: 16px;
}
.project-frame iframe {
  display: block;
  width: 100%;
  height: 460px;
  border: 0;
  background: #ffffff;
}

.project-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 24px;
  background: var(--surface-lowest);
  transition: opacity 0.4s ease;
}
.project-fallback .label-caps {
  color: var(--on-surface-variant);
}
.project-fallback a {
  color: var(--primary);
  text-decoration: underline;
}
.project-frame.is-loaded .project-fallback {
  opacity: 0;
  pointer-events: none;
}

.project-url {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}
.project-url .label-caps {
  color: var(--outline);
}
.project-url a {
  color: var(--primary);
  transition: opacity 0.2s ease;
}
.project-url a:hover {
  opacity: 0.7;
}

.project-body .chip {
  margin-bottom: 12px;
}
.project-title {
  color: var(--primary);
  margin-bottom: 12px;
}
.project-body p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.section-head {
  margin-bottom: 64px;
}
.section-head p {
  font-size: 16px;
  color: var(--on-surface-variant);
  max-width: 520px;
  margin-top: 8px;
}

.headline {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--on-surface);
  margin-bottom: 8px;
}

.headline-sm {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--on-surface);
}

/* ---------- Bio ---------- */
.bio-top {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--gutter);
  align-items: start;
}

.bio-lede {
  display: grid;
  gap: 24px;
  font-size: 18px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  margin-top: 24px;
  max-width: 560px;
}

.academic-card {
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.academic-label {
  color: var(--on-surface-variant);
  letter-spacing: 0.2em;
  margin-bottom: 32px;
}

.academic-row + .academic-row {
  margin-top: 40px;
}

.academic-period {
  color: var(--primary);
  margin-bottom: 16px;
}

.academic-entry {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  font-size: 18px;
  line-height: 1.6;
  color: var(--on-surface);
}
.academic-entry + .academic-entry {
  margin-top: 16px;
}
.academic-subject {
  font-weight: 300;
}
.academic-result {
  font-family: var(--font-serif);
  font-size: 24px;
  font-style: italic;
  line-height: 1;
  color: var(--on-surface-variant);
  white-space: nowrap;
}

.bio-quote {
  margin: 96px auto;
  max-width: 820px;
  text-align: center;
  padding: 64px 24px;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.bio-quote p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.4;
  color: var(--primary);
}

/* Chapters timeline */
.chapters {
  display: grid;
  gap: 96px;
}

.chapter {
  display: grid;
  grid-template-columns: 6fr 6fr;
  gap: var(--gutter);
  align-items: center;
}

.chapter-figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}
.chapter-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.85);
  transition: filter 0.7s ease, transform 0.6s var(--ease-out);
}
.chapter-figure:hover img {
  filter: saturate(1);
  transform: scale(1.02);
}

.chapter-body {
  padding: 16px 0;
}
.chapter-body p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
  margin-top: 12px;
}

.chapter-index {
  color: var(--on-surface-variant);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 16px;
}

.chapter-title {
  color: var(--primary);
}

.chapter-reverse .chapter-body {
  order: -1;
}

/* ---------- Chips & pills ---------- */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.chip {
  display: inline-block;
  background: var(--chip-bg);
  color: var(--on-surface-variant);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  line-height: 1;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-container);
  color: var(--on-surface-variant);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: var(--radius);
  line-height: 1;
  margin-bottom: 24px;
}
.pill-icon {
  font-size: 13px;
  line-height: 1;
}

/* ---------- Involvement ---------- */
.banner {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 96px;
}
.banner img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  filter: grayscale(0.25);
  transition: filter 0.7s ease, transform 0.6s var(--ease-out);
}
.banner:hover img {
  filter: grayscale(0);
  transform: scale(1.01);
}

.tier {
  display: grid;
  grid-template-columns: 6fr 6fr;
  gap: var(--gutter);
  margin-bottom: 80px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 48px;
}
.tier:last-child {
  margin-bottom: 0;
}

.tier-label {
  color: var(--on-surface-variant);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 16px;
}

.tier-item {
  max-width: 520px;
}
.tier-item p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
  margin-top: 16px;
}
.tier-title {
  color: var(--on-surface);
  transition: color 0.3s ease;
}
.tier-item:hover .tier-title {
  color: var(--primary);
}

.tier-label-block {
  grid-column: 1 / -1;
  border-top: 1px solid var(--border-subtle);
  padding-top: 48px;
  margin-bottom: 0;
}

.card-grid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}

.card {
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
  background: var(--surface-high);
  box-shadow: var(--shadow-ambient);
}
.card-title {
  color: var(--on-surface);
  margin-bottom: 16px;
  transition: color 0.3s ease;
}
.card:hover .card-title {
  color: var(--primary);
}
.card p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.browse-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}
.browse-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-ambient);
}
.browse-index {
  color: var(--outline-variant);
  letter-spacing: 0.2em;
  margin-bottom: 24px;
}
.browse-link {
  margin-top: 24px;
  padding: 8px 0;
  color: var(--on-surface);
}
.browse-card:hover .browse-link {
  color: var(--primary);
}

.expo-list {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
}
.expo-item {
  font-size: 16px;
  color: var(--on-surface-variant);
  cursor: default;
  transition: color 0.2s ease;
}
.expo-item:hover {
  color: var(--on-surface);
}

/* ---------- Passions (bento) ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gutter);
}

.bento-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gutter);
  align-items: center;
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.bento-tile {
  display: flex;
  flex-direction: column;
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: box-shadow 0.3s ease;
}
.bento-tile:hover,
.bento-wide:hover {
  box-shadow: var(--shadow-ambient);
}

.bento-media {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface-container);
  margin-bottom: 24px;
}
.bento-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: grayscale(0.2);
  transition: filter 0.6s ease, transform 0.6s var(--ease-out);
}
.bento-media:hover img {
  filter: grayscale(0);
  transform: scale(1.02);
}

.bento-content p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
  margin-bottom: 24px;
}

.bento-title {
  color: var(--primary);
  margin-bottom: 12px;
}

/* ---------- Experience ---------- */
.experience-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--gutter);
  align-items: start;
}

.experience-col {
  display: grid;
  gap: 24px;
}

.exp-card {
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: box-shadow 0.3s ease;
}
.exp-card:hover {
  box-shadow: var(--shadow-ambient);
}

.exp-figure {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}
.exp-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}
.exp-figure:hover img {
  transform: scale(1.03);
}

.exp-card-head {
  margin-bottom: 16px;
}
.exp-card-head .pill {
  margin-bottom: 0;
}

.exp-card > .chip-row {
  margin-top: 0;
  margin-bottom: 16px;
}

.exp-card > p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.exp-list {
  display: grid;
  gap: 0;
}
.exp-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-subtle);
}
.exp-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.exp-list h4 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 8px;
}
.exp-list p {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.exp-inline-figure {
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 16px;
}
.exp-inline-figure img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}
.exp-inline-figure:hover img {
  transform: scale(1.03);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  position: relative;
  z-index: 1;
  background: var(--surface-low);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gutter);
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  color: var(--on-surface);
}

.footer-links {
  display: flex;
  gap: 32px;
}
.footer-links a {
  color: var(--on-surface-variant);
  transition: color 0.2s ease;
}
.footer-links a:hover {
  color: var(--on-surface);
}

.footer-copy {
  color: var(--outline-variant);
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
.js .reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  transition-delay: var(--reveal-delay, 0ms);
}
.js .reveal.active {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ==========================================================================
   Intro / entry screen (homepage)
   ========================================================================== */
.intro {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  background-color: var(--surface);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0;
  pointer-events: none;
}
.intro[hidden] {
  display: none;
}
.intro.is-visible {
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.6s ease;
}
.intro.is-leaving {
  opacity: 0;
  transform: translateY(-40px);
  pointer-events: none;
  transition: opacity 0.7s ease, transform 0.7s var(--ease-out);
}

.intro-inner {
  max-width: 720px;
}
.intro-inner > * {
  opacity: 0;
  transform: translateY(18px);
  animation: introUp 0.7s var(--ease-out) forwards;
}
.intro-inner > *:nth-child(1) { animation-delay: 0.10s; }
.intro-inner > *:nth-child(2) { animation-delay: 0.20s; }
.intro-inner > *:nth-child(3) { animation-delay: 0.30s; }
.intro-inner > *:nth-child(4) { animation-delay: 0.42s; }
.intro-inner > *:nth-child(5) { animation-delay: 0.54s; }
.intro-inner > *:nth-child(6) { animation-delay: 0.66s; }
.intro-inner > *:nth-child(7) { animation-delay: 0.78s; }

@keyframes introUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.intro-eyebrow {
  color: var(--on-surface-variant);
  letter-spacing: 0.24em;
  margin-bottom: 20px;
}
.intro-title {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 8vw, 4.5rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--primary);
}
.intro-message {
  margin: 24px auto 0;
  max-width: 560px;
  font-size: 17px;
  line-height: 1.65;
  color: var(--on-surface-variant);
}
.intro-rule {
  width: 56px;
  height: 1px;
  background: var(--outline-variant);
  margin: 28px auto;
}
.intro-enter {
  min-width: 180px;
}
.intro-enter .arrow {
  font-size: 18px;
  line-height: 1;
  transition: transform 0.15s ease;
}
.intro-enter:hover .arrow {
  transform: translateX(4px);
}
.intro-hint {
  margin-top: 24px;
  color: var(--outline);
  letter-spacing: 0.18em;
}

@media (prefers-reduced-motion: reduce) {
  .intro,
  .intro.is-visible,
  .intro.is-leaving {
    transition: opacity 0.01s ease;
  }
  .intro-inner > * {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (min-width: 769px) {
  .container {
    padding-left: var(--margin-desktop);
    padding-right: var(--margin-desktop);
  }
  .scroll-hint {
    left: var(--margin-desktop);
  }
}

@media (max-width: 768px) {
  html {
    scroll-padding-top: 72px;
  }

  .display {
    font-size: 36px;
    line-height: 1.2;
    letter-spacing: -0.01em;
  }

  .hero {
    min-height: auto;
    padding-top: 64px;
    padding-bottom: 72px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-copy {
    max-width: none;
  }
  .lead {
    margin-bottom: 32px;
  }
  .portrait-frame {
    max-width: 360px;
  }
  .scroll-hint {
    display: none;
  }

  .section {
    padding: 64px 0;
  }

  .page-head {
    padding: 64px 0 40px;
  }
  .section-block {
    margin-bottom: 64px;
  }

  .inv-grid-2,
  .inv-grid-3 {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .inv-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .bio-top {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .bio-quote {
    margin: 64px auto;
    padding: 48px 8px;
  }
  .chapters {
    gap: 64px;
  }
  .chapter {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .chapter-reverse .chapter-body {
    order: 1;
  }

  .tier {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .expo-list {
    gap: 12px 24px;
  }

  .bento {
    grid-template-columns: 1fr;
  }
  .bento-wide {
    grid-template-columns: 1fr;
    padding: 24px;
    gap: 24px;
  }
  .bento-tile {
    padding: 24px;
  }
  .bento-tiles {
    grid-template-columns: 1fr;
  }
  .report-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .project-frame iframe {
    height: 400px;
  }

  .experience-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
}

/* Mobile navigation */
@media (max-width: 768px) {
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(80vw, 320px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    background: var(--surface-lowest);
    border-left: 1px solid var(--border-subtle);
    padding: 96px 40px 40px;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease-out);
    z-index: 150;
  }
  .main-nav.is-open {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    width: 100%;
  }
  .nav-list li {
    width: 100%;
  }
  .nav-link {
    display: block;
    padding: 12px 0;
    font-size: 14px;
    width: 100%;
    border-bottom: 0;
  }
  .nav-link.active {
    border-bottom: 0;
  }

  .nav-cta-mobile {
    display: inline-flex;
    width: 100%;
    margin-top: 32px;
  }
}

/* ==========================================================================
   Skills matrix
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}

.skill-group {
  background: var(--surface-lowest);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: box-shadow 0.3s ease;
}
.skill-group:hover {
  box-shadow: var(--shadow-ambient);
}
.skill-group .tier-label {
  margin-bottom: 20px;
}
.skill-group .chip-row {
  margin-top: 0;
}

/* ==========================================================================
   Certificates
   ========================================================================== */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gutter);
}

.cert-card {
  display: block;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 8px;
  background: var(--surface-lowest);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.cert-card:hover {
  box-shadow: var(--shadow-ambient);
  transform: translateY(-2px);
}
.cert-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 4px);
  filter: grayscale(1);
  transition: filter 0.6s ease;
}
.cert-card:hover img {
  filter: grayscale(0);
}
.cert-cap {
  display: block;
  padding: 12px 4px 4px;
  text-align: center;
}

/* ==========================================================================
   Gallery
   ========================================================================== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}

.gallery-item {
  display: block;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 8px;
  background: var(--surface-lowest);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.gallery-item:hover {
  box-shadow: var(--shadow-ambient);
  transform: translateY(-2px);
}
.gallery-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 4px);
  filter: grayscale(0.25);
  transition: filter 0.6s ease;
}
.gallery-item:hover img {
  filter: grayscale(0);
}
.gallery-cap {
  display: block;
  padding: 12px 4px 4px;
  text-align: center;
}

.gallery-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  border-radius: calc(var(--radius-lg) - 4px);
  background:
    repeating-linear-gradient(45deg, var(--surface-container), var(--surface-container) 10px, var(--surface-low) 10px, var(--surface-low) 20px);
  border: 1px dashed var(--outline-variant);
  color: var(--outline);
}

/* ==========================================================================
   Lightbox
   ========================================================================== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: rgba(26, 28, 28, 0.92);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.lightbox.open {
  display: flex;
}
.lightbox img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
}
.lightbox-cap {
  position: absolute;
  bottom: 24px;
  left: 0;
  right: 0;
  text-align: center;
  color: var(--inverse-on-surface, #f1f1f0);
}
.lightbox-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}
.lightbox-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}
.lightbox-prev {
  left: 24px;
}
.lightbox-next {
  right: 24px;
}
.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  transform: none;
}

/* ==========================================================================
   AI assistant widget (glass)
   ========================================================================== */
.ai-widget {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  font-family: var(--font-sans);
}

.ai-panel {
  width: min(380px, calc(100vw - 40px));
  max-height: min(520px, 70vh);
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.14);
  overflow: hidden;
}
.ai-panel[hidden],
.ai-fab[hidden] {
  display: none;
}

.ai-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(255, 255, 255, 0.5);
}
.ai-head-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--on-surface);
}
.ai-head-note {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-top: 2px;
}
.ai-close {
  border: 0;
  background: transparent;
  color: var(--on-surface-variant);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 4px;
}
.ai-close:hover {
  color: var(--on-surface);
}

.ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ai-msg {
  max-width: 88%;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.5;
}
.ai-msg-user {
  align-self: flex-end;
  background: var(--on-surface);
  color: var(--surface);
  border-bottom-right-radius: 2px;
}
.ai-msg-bot {
  align-self: flex-start;
  background: rgba(0, 0, 0, 0.05);
  color: var(--on-surface);
  border-bottom-left-radius: 2px;
}
.ai-msg a {
  text-decoration: underline;
}
.ai-msg-sources {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--on-surface-variant);
}
.ai-msg-sources a {
  text-decoration: none;
}

.ai-form {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(255, 255, 255, 0.5);
}
.ai-input {
  flex: 1;
  padding: 10px 14px;
  font-family: inherit;
  font-size: 14px;
  color: var(--on-surface);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  outline: none;
}
.ai-input:focus {
  border-color: var(--primary);
}
.ai-send {
  border: 0;
  background: var(--on-surface);
  color: var(--surface);
  width: 40px;
  border-radius: var(--radius);
  font-size: 16px;
  cursor: pointer;
}
.ai-send:hover {
  background: var(--on-surface-variant);
}

.ai-fab {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  color: var(--on-surface);
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.ai-fab:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .skills-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .ai-panel {
    max-height: 60vh;
  }
}