@layer sections {
  /* ── Hero: ID card, about card, terminal ───────────────── */
  .hero {
    display: grid;
    gap: var(--space-8);
    align-items: start;
  }
  @media (min-width: 60rem) {
    .hero {
      grid-template-columns: minmax(0, 22rem) minmax(0, 1fr);
    }
  }
  .hero__side {
    display: grid;
    gap: var(--space-6);
  }

  .id-card {
    display: grid;
    justify-items: center;
    gap: var(--space-4);
    padding-block-start: var(--space-8);
    text-align: center;
  }
  .tape {
    position: absolute;
    inset-block-start: -0.9rem;
    inset-inline-start: 50%;
    inline-size: 8rem;
    block-size: 1.9rem;
    translate: -50% 0;
    rotate: -5deg;
    background: color-mix(in srgb, var(--yellow) 55%, transparent);
    border: 1px solid rgb(0 0 0 / 0.2);
    backdrop-filter: blur(1px);
  }
  .id-card__avatar {
    inline-size: 9.5rem;
    aspect-ratio: 1;
    padding: 0.45rem;
    background: var(--pink);
    border: var(--border-lg) solid #000000;
    border-radius: 50%;
    box-shadow: 5px 5px 0 #000000;
  }
  .id-card__avatar img {
    inline-size: 100%;
    block-size: 100%;
    object-fit: cover;
    border: 3px solid #000000;
    border-radius: 50%;
  }
  .id-card__name {
    font-size: clamp(2.1rem, 7vw, 2.75rem);
  }
  .id-card__role {
    padding: var(--space-1) var(--space-3);
    background: #000000;
    color: #ffffff;
    font-family: var(--font-mono);
    font-weight: 700;
    rotate: 1deg;
    box-shadow: 3px 3px 0 var(--pink);
  }
  .id-card__rows {
    display: grid;
    gap: var(--space-2);
    justify-self: stretch;
    text-align: start;
  }
  .id-card__row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    align-items: baseline;
  }
  .id-card__actions {
    display: grid;
    gap: var(--space-3);
    justify-self: stretch;
  }

  .about {
    display: grid;
    gap: var(--space-4);
    font-size: 1.05rem;
  }
  .about__greeting {
    font-size: clamp(2.2rem, 6vw, 3.2rem);
  }

  /* ── Terminal window (identical in both themes) ────────── */
  .terminal-window {
    overflow: hidden;
    background: var(--terminal-bg);
    color: var(--on-terminal-bg);
    border: var(--border-lg) solid #000000;
    border-radius: var(--radius-button);
    box-shadow: var(--shadow-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
  }
  .terminal-window__bar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-4);
    background: #1a1a1a;
    border-block-end: var(--border) solid #333333;
  }
  .terminal-window__dots {
    display: flex;
    gap: 6px;
  }
  .terminal-window__dots span {
    inline-size: 12px;
    block-size: 12px;
    border-radius: 50%;
    background: var(--red);
  }
  .terminal-window__dots span:nth-child(2) {
    background: var(--yellow);
  }
  .terminal-window__dots span:nth-child(3) {
    background: var(--green);
  }
  .terminal-window__title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: #bbbbbb;
  }
  .terminal-window__body {
    padding: var(--space-4);
  }
  .terminal-window__output {
    max-block-size: 16rem;
    overflow-y: auto;
    scrollbar-color: var(--terminal-accent) var(--terminal-bg);
  }
  .terminal-window__line {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }
  .terminal-window__line--cmd {
    color: var(--terminal-accent);
  }
  .terminal-window__line--error {
    color: var(--red);
  }
  .terminal-window__prompt {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-block-start: var(--space-2);
  }
  .terminal-window__ps1 {
    flex: none;
    color: var(--terminal-accent);
  }
  .terminal-window__input {
    flex: 1;
    min-inline-size: 0;
    min-block-size: 44px;
    padding: 0;
    background: transparent;
    color: inherit;
    border: none;
    caret-color: var(--terminal-accent);
  }
  .terminal-window__input:focus-visible {
    outline: 2px dashed var(--terminal-accent);
    outline-offset: 2px;
  }
  .terminal-window__input:disabled {
    opacity: 0.6;
  }

  /* Error pages reuse a one-off terminal box. */
  .terminal {
    padding: var(--space-4);
    background: var(--terminal-bg);
    color: var(--on-terminal-bg);
    border: var(--border-lg) solid #000000;
    border-radius: var(--radius-button);
    font-family: var(--font-mono);
  }
  .terminal__line--error {
    color: var(--terminal-accent);
  }
  .error-page {
    max-inline-size: 40rem;
  }

  /* ── Experience timeline ───────────────────────────────── */
  .timeline {
    display: grid;
    gap: var(--space-8);
  }
  .timeline__item {
    position: relative;
    display: grid;
    gap: var(--space-3);
  }
  .timeline__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    align-items: center;
  }
  .timeline__date,
  .timeline__location,
  .timeline__duration {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: #ffffff;
    color: #000000;
    border: var(--border) solid #000000;
    border-radius: var(--radius-pill);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
  }
  .timeline__date {
    background: var(--yellow);
    color: var(--on-yellow);
    box-shadow: 3px 3px 0 #000000;
  }
  .timeline__duration {
    background: transparent;
    color: var(--ink);
    border-color: var(--ink);
  }
  .timeline__connector,
  .timeline__wave {
    display: none;
  }
  .timeline__card {
    display: grid;
    gap: var(--space-4);
    padding-block-start: calc(var(--space-6) + 0.9rem);
  }
  .timeline__header {
    display: flex;
    gap: var(--space-3);
    align-items: center;
  }
  .timeline__logo {
    inline-size: 48px;
    block-size: 48px;
    object-fit: contain;
    border: var(--border) solid var(--ink);
    border-radius: var(--radius-button);
  }
  .timeline__role {
    font-size: 1.6rem;
  }
  .timeline__company {
    font-weight: 700;
  }
  .timeline__summary {
    font-weight: 700;
  }
  @media (min-width: 60rem) {
    .timeline__item {
      grid-template-columns: 13rem 3rem minmax(0, 1fr);
      gap: 0;
      align-items: start;
    }
    .timeline__meta {
      flex-direction: column;
      align-items: flex-end;
    }
    .timeline__connector {
      display: block;
      margin-block-start: 1.1rem;
      block-size: var(--border-lg);
      background: var(--ink);
    }
    /* Dotted wavy line from this item's date down to the next one. */
    .timeline__wave {
      display: block;
      position: absolute;
      inset-block: 3.5rem calc(-1 * var(--space-8) - 0.25rem);
      inset-inline-start: 10rem;
      inline-size: 2.5rem;
      block-size: calc(100% - 3.25rem + var(--space-8));
      overflow: visible;
      fill: none;
      stroke: var(--ink);
      stroke-width: 4;
      stroke-dasharray: 1 10;
      stroke-linecap: round;
    }
    .timeline__wave path {
      vector-effect: non-scaling-stroke;
    }
  }

  /* ── Skills ────────────────────────────────────────────── */
  .skills-board {
    display: grid;
    gap: var(--space-6);
    padding: clamp(var(--space-4), 4vw, var(--space-8));
    border: var(--border-lg) solid #000000;
    border-radius: calc(var(--radius-card) * 1.5);
    box-shadow: 8px 8px 0 #000000;
  }
  .skills-grid {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  }
  .skill-card {
    display: grid;
    align-content: start;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--paper);
    color: var(--ink);
    border: var(--border) solid #000000;
    border-radius: var(--radius-card);
    box-shadow: 4px 4px 0 #000000;
  }
  .skill-card__title {
    justify-self: start;
    padding: 0 var(--space-3);
    border: var(--border) solid #000000;
    border-radius: var(--radius-tag);
    font-size: 1.15rem;
    rotate: -2deg;
  }
  .skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  .skill-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 0.15rem var(--space-3);
    background: var(--paper);
    border: var(--border) solid var(--ink);
    border-radius: var(--radius-pill);
    font-size: 0.9rem;
    font-weight: 700;
  }
  @media (prefers-reduced-motion: no-preference) {
    .skill-pill {
      transition:
        background-color 0.15s ease,
        transform 0.15s ease;
    }
  }
  .skill-pill:hover {
    background: var(--green);
    color: var(--on-green);
    transform: translateY(-2px);
  }
  .skill-pill__level {
    font-family: var(--font-mono);
    font-size: 0.75rem;
  }

  /* ── Project cards ─────────────────────────────────────── */
  .project-card {
    display: grid;
    align-content: start;
    gap: var(--space-4);
    block-size: 100%;
    padding-block-start: calc(var(--space-6) + 0.9rem);
  }
  .project-card__head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
  }
  .project-card__title {
    font-size: 1.7rem;
  }
  .project-card__links {
    display: flex;
    gap: var(--space-3);
  }
  .project-card__points {
    display: grid;
    gap: var(--space-2);
    padding-block-start: var(--space-4);
    padding-inline-start: 1.25rem;
    border-block-start: var(--border) dashed var(--ink);
  }

  /* ── Testimonials: speech bubbles in a scroll-snap row ─── */
  .snap-row {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: min(85%, 24rem);
    gap: var(--space-6);
    padding-block: var(--space-2) var(--space-6);
    padding-inline: var(--space-1);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    overscroll-behavior-x: contain;
  }
  .snap-row__item {
    scroll-snap-align: start;
  }
  .bubble {
    position: relative;
    display: grid;
    gap: var(--space-3);
    block-size: 100%;
    padding: var(--space-6);
    border: var(--border-lg) solid #000000;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-sm);
  }
  .bubble__quote {
    font-size: 1.05rem;
  }
  .bubble__rating {
    color: #000000;
    letter-spacing: 0.1em;
  }
  .bubble__author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
  }
  .bubble__avatar {
    inline-size: 56px;
    block-size: 56px;
    object-fit: cover;
    border: var(--border) solid #000000;
    border-radius: 50%;
  }
  .bubble__name {
    display: block;
    font-weight: 900;
  }
  .bubble__role {
    display: block;
    font-size: 0.9rem;
  }

  /* ── Research ──────────────────────────────────────────── */
  .paper-card {
    display: grid;
    grid-template-columns: 3.5rem minmax(0, 1fr);
    padding: 0;
    overflow: hidden;
  }
  .paper-card__rail {
    display: grid;
    grid-template-rows: auto 1fr;
    justify-items: center;
    gap: var(--space-4);
    padding-block: var(--space-4);
    border-inline-end: var(--border-lg) solid #000000;
  }
  .paper-card__dots {
    display: grid;
    gap: 5px;
  }
  .paper-card__dots span {
    inline-size: 10px;
    block-size: 10px;
    background: #ffffff;
    border: 2px solid #000000;
    border-radius: 50%;
  }
  .paper-card__label {
    writing-mode: vertical-rl;
    rotate: 180deg;
    font-family: var(--font-mono);
    font-weight: 700;
  }
  .paper-card__body {
    display: grid;
    gap: var(--space-3);
    padding: var(--space-6);
  }
  .paper-card__title {
    font-size: clamp(1.4rem, 4vw, 2rem);
  }
  .paper-card__meta {
    font-style: italic;
  }
  .paper-card__footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding-block-start: var(--space-3);
    border-block-start: var(--border) dashed var(--ink);
  }

  /* ── Latest posts ──────────────────────────────────────── */
  .post-card {
    display: grid;
    align-content: start;
    gap: var(--space-3);
    block-size: 100%;
  }
  .post-card > .chip,
  .post-card__body > .chip {
    justify-self: start;
  }
  .post-card__cover {
    inline-size: 100%;
    aspect-ratio: 1200 / 630;
    object-fit: cover;
    border: var(--border) solid var(--ink);
    border-radius: var(--radius-button);
  }
  .post-card__title {
    font-size: 1.5rem;
  }
  .post-card__title a {
    text-decoration: none;
  }
  .post-card__title a:hover {
    text-decoration: underline;
  }
  .post-card__meta {
    font-family: var(--font-mono);
    font-size: 0.85rem;
  }

  /* ── Education and the blackboard ──────────────────────── */
  .education-layout {
    display: grid;
    gap: var(--space-8);
    align-items: start;
  }
  @media (min-width: 60rem) {
    .education-layout--board {
      grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    }
  }
  .edu-card {
    display: grid;
    gap: var(--space-2);
    padding-block-start: var(--space-8);
  }
  .year-badge {
    position: absolute;
    inset-block-start: -1rem;
    inset-inline-start: -0.75rem;
    padding: var(--space-1) var(--space-3);
    background: #000000;
    color: #ffffff;
    border: var(--border) solid #000000;
    border-radius: var(--radius-tag);
    box-shadow: 3px 3px 0 var(--pink);
    font-family: var(--font-mono);
    font-weight: 700;
    rotate: -6deg;
  }
  .edu-card__header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
  }
  .edu-card__logo {
    inline-size: 48px;
    block-size: 48px;
    object-fit: contain;
  }
  .edu-card__school {
    font-size: 1.6rem;
  }
  .edu-card__degree {
    font-weight: 900;
  }
  .edu-card__meta {
    font-family: var(--font-mono);
    font-size: 0.85rem;
  }

  .blackboard {
    --board: #1f3a2c;
    --frame: #8a5a2b;
    --chalk-white: #f5f5f0;
    display: grid;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--frame);
    border: var(--border-lg) solid #000000;
    border-radius: var(--radius-button);
    box-shadow: var(--shadow-lg);
  }
  .blackboard__canvas {
    inline-size: 100%;
    aspect-ratio: 16 / 10;
    background: var(--board);
    border: var(--border) solid #000000;
    border-radius: 6px;
    touch-action: none;
  }
  .blackboard__caption {
    color: #ffffff;
    font-family: var(--font-mono);
    font-weight: 700;
    text-shadow: 1px 1px 0 #000000;
  }
  .blackboard__tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
  }
  .chalk {
    inline-size: 44px;
    block-size: 44px;
    border: 3px solid #000000;
    border-radius: 50%;
    cursor: pointer;
  }
  .chalk[aria-pressed='true'] {
    outline: 3px solid #ffffff;
    outline-offset: 2px;
  }
  .chalk--white {
    background: var(--chalk-white);
  }
  .chalk--yellow {
    background: var(--yellow);
  }
  .chalk--pink {
    background: var(--pink);
  }
  .chalk--blue {
    background: var(--blue);
  }
  .chalk--green {
    background: var(--green);
  }
  .blackboard__size {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-block-size: 44px;
    color: #ffffff;
    font-weight: 700;
  }

  /* ── Certifications ────────────────────────────────────── */
  .cert-card {
    display: grid;
    grid-template-columns: 4rem minmax(0, 1fr);
    gap: var(--space-4);
    block-size: 100%;
  }
  .cert-card__badge {
    display: grid;
    place-items: center;
    inline-size: 4rem;
    block-size: 4rem;
    border: var(--border) solid #000000;
    border-radius: 50%;
    box-shadow: 3px 3px 0 #000000;
  }
  .cert-card__badge .icon {
    inline-size: 2rem;
    block-size: 2rem;
  }
  .cert-card__badge img {
    inline-size: 100%;
    block-size: 100%;
    object-fit: contain;
    border-radius: 50%;
  }
  .cert-card__body {
    display: grid;
    align-content: start;
    gap: var(--space-2);
  }
  .cert-card__title {
    font-size: 1.3rem;
  }
  .cert-card__issuer {
    font-weight: 900;
  }
  .cert-card__dates,
  .cert-card__id {
    font-family: var(--font-mono);
    font-size: 0.85rem;
  }
  .cert-card .btn {
    justify-self: start;
  }

  /* ── Accordions: slanted panels attached to a page edge ── */
  .accordion {
    padding-block: var(--space-2);
    overflow-x: clip;
  }
  .accordion__panel {
    inline-size: min(100% - var(--gutter), 64rem);
    border: var(--border-lg) solid #000000;
    box-shadow: 6px 6px 0 #000000;
  }
  .accordion--right .accordion__panel {
    margin-inline-start: auto;
    border-inline-end: none;
    border-start-start-radius: var(--radius-card);
    border-end-start-radius: var(--radius-card);
  }
  .accordion--left .accordion__panel {
    margin-inline-end: auto;
    border-inline-start: none;
    border-start-end-radius: var(--radius-card);
    border-end-end-radius: var(--radius-card);
  }
  .accordion__panel:not([open]) {
    rotate: -1.5deg;
  }
  .accordion--left .accordion__panel:not([open]) {
    rotate: 1.5deg;
  }
  @media (prefers-reduced-motion: no-preference) {
    .accordion__panel {
      transition: rotate 0.2s ease;
    }
  }
  .accordion__summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    min-block-size: 44px;
    padding: var(--space-4) var(--space-6);
    list-style: none;
    cursor: pointer;
  }
  .accordion__summary::-webkit-details-marker {
    display: none;
  }
  .accordion__summary::after {
    content: '+';
    display: grid;
    place-items: center;
    inline-size: 2.5rem;
    block-size: 2.5rem;
    flex: none;
    background: #ffffff;
    color: #000000;
    border: var(--border) solid #000000;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 900;
  }
  .accordion__panel[open] > .accordion__summary::after {
    content: '−';
  }
  .accordion__summary .icon {
    margin-inline-start: auto;
    inline-size: 2rem;
    block-size: 2rem;
  }
  .accordion__title {
    font-size: clamp(1.8rem, 6vw, 2.8rem);
  }
  .accordion__content {
    padding: 0 var(--space-6) var(--space-6);
  }
  .coding-card,
  .story-card {
    display: grid;
    align-content: start;
    gap: var(--space-3);
  }
  .coding-card__platform,
  .story-card__title {
    font-size: 1.5rem;
  }
  .coding-card__stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
  }
  .coding-card__stats dd {
    font-family: var(--font-display);
    font-size: 1.5rem;
  }
  .coding-card__image {
    inline-size: 100%;
    block-size: auto;
    border: var(--border) solid var(--ink);
    background: var(--paper);
  }
  .story-card__image {
    inline-size: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border: var(--border) solid var(--ink);
    border-radius: var(--radius-button);
  }
  .story-card__subtitle {
    font-weight: 700;
  }

  /* ── Marquee: a tilted band that scrolls forever ───────── */
  .marquee {
    padding-block: var(--space-8);
    /* The band is wider than the page and tilted; clip it here, not on body. */
    overflow-x: clip;
  }
  .marquee__band {
    margin-inline: -2rem;
    padding-block: var(--space-3);
    overflow: hidden;
    background: var(--yellow);
    color: var(--on-yellow);
    border-block: var(--border-lg) solid #000000;
    rotate: -2deg;
    box-shadow: 0 6px 0 #000000;
  }
  .marquee__track {
    display: flex;
    inline-size: max-content;
  }
  .marquee__list {
    display: flex;
    flex: none;
  }
  .marquee__list li {
    padding-inline: var(--space-4);
    font-size: clamp(1.1rem, 3vw, 1.6rem);
    font-weight: 900;
    text-transform: uppercase;
    white-space: nowrap;
  }
  .marquee__list li::after {
    content: '✦';
    margin-inline-start: var(--space-8);
  }
  @media (prefers-reduced-motion: no-preference) {
    .fx-marquee .marquee__track {
      animation: fx-marquee 32s linear infinite;
    }
    .fx-marquee .marquee:is(:hover, :focus-within) .marquee__track {
      animation-play-state: paused;
    }
  }
  @keyframes fx-marquee {
    to {
      transform: translateX(-50%);
    }
  }

  /* ── Newsletter and contact ────────────────────────────── */
  .newsletter {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-6);
  }
  @media (min-width: 60rem) {
    .newsletter {
      grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
      align-items: center;
    }
  }
  .newsletter__title {
    font-size: clamp(1.8rem, 5vw, 2.6rem);
  }
  .newsletter__form {
    display: grid;
    gap: var(--space-3);
  }
  .newsletter__consent {
    font-size: 0.9rem;
  }
  .newsletter__form .btn {
    justify-self: start;
  }

  .contact-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-8);
  }
  @media (min-width: 60rem) {
    .contact-card:not(.contact-card--page) {
      grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    }
  }
  .contact-card__intro {
    display: grid;
    align-content: start;
    gap: var(--space-4);
  }
}

@layer sections {
  /* ── Resume page (/resume) ─────────────────────────────── */
  .resume {
    display: grid;
    gap: var(--space-8);
  }
  .resume__header {
    display: grid;
    gap: var(--space-4);
  }
  .resume__name {
    font-size: clamp(2.2rem, 7vw, 3.2rem);
  }
  .resume__title {
    font-family: var(--font-mono);
    font-weight: 700;
  }
  .resume__contact {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-6);
  }
  .resume__contact li {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
  }
  .resume__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
  }
  .resume__section {
    display: grid;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--paper);
    color: var(--ink);
    border: var(--border) solid var(--ink);
    border-radius: var(--radius-button);
  }
  .resume__heading {
    justify-self: start;
    padding: 0 var(--space-3);
    background: var(--yellow);
    color: var(--on-yellow);
    border: var(--border) solid #000000;
    border-radius: var(--radius-tag);
    font-size: 1.4rem;
  }
  .resume__item {
    display: grid;
    gap: var(--space-2);
  }
  .resume__item + .resume__item {
    padding-block-start: var(--space-4);
    border-block-start: 1px dashed var(--ink);
  }
  .resume__item-title {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 900;
  }
  .resume__meta,
  .resume__tech {
    font-family: var(--font-mono);
    font-size: 0.85rem;
  }
  .resume__skills {
    display: grid;
    gap: var(--space-2);
  }
  .resume__skills dt {
    display: inline;
    font-weight: 900;
  }
  .resume__skills dt::after {
    content: ': ';
  }
  .resume__skills dd {
    display: inline;
  }
  .resume__list {
    display: grid;
    gap: var(--space-2);
    padding-inline-start: 1.25rem;
  }
}