/* ==========================================================================
   theme.css — visual skin for SPEC Contract 3 classes
   Owner: design layer. Load LAST: tokens.css -> base.css -> theme.css.

   theme.css owns: colour, backgrounds, borders, radii, shadows, typography
   treatment, the INSIDE of boxed components (btn, tag, card, project-card,
   timeline item, cert, contact-card, stat, icon buttons), states and motion.

   base.css owns: page layout — container, header bar positioning, nav
   arrangement + mobile panel, hero composition, section padding, grids,
   gaps between components, breakpoints, and the `display` of .nav,
   .nav-toggle and .theme-toggle (this file never sets them).
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Document & typography
   -------------------------------------------------------------------------- */
html {
  accent-color: var(--color-accent);
}

body {
  counter-reset: section;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

::selection {
  background-color: var(--color-selection);
  color: var(--color-text);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
  text-wrap: balance;
}

p, li {
  text-wrap: pretty;
}

strong, b {
  font-weight: var(--fw-semibold);
}

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

a {
  color: var(--color-accent);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--color-accent-line);
  text-underline-offset: 0.22em;
}

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

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   2. Header & navigation
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-header-bg);
  border-bottom: 1px solid var(--color-header-border);
}

/* Blur only while the menu is closed: backdrop-filter makes the header the
   containing block of position:fixed descendants (e.g. a mobile nav panel). */
.site-header:not(.is-open) {
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  backdrop-filter: saturate(1.6) blur(14px);
}

.site-header.is-open {
  background-color: var(--color-bg);
  border-bottom-color: var(--color-border);
}

.brand {
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-tight);
  text-decoration: none;
  white-space: nowrap;
}

.brand::before {                         /* small "data node" mark */
  content: "";
  display: inline-block;
  inline-size: 0.55em;
  block-size: 0.55em;
  margin-inline-end: 0.6em;
  border-radius: 50%;
  background-color: var(--color-accent);
  box-shadow: 0 0 0 0.2em var(--color-accent-soft);
  vertical-align: 0.06em;
}

.brand:hover {
  color: var(--color-text);
}

.nav__link {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  text-decoration-line: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.5em;
}

.nav__link:hover {
  color: var(--color-text);
  text-decoration-color: var(--color-border-strong);
}

.nav__link.is-active,
.nav__link[aria-current="true"],
.nav__link[aria-current="page"] {
  color: var(--color-text);
  text-decoration-color: var(--color-accent);
}

/* Icon buttons. Sizing + look only; base.css sets their `display`
   (inline-flex recommended) and hides .nav-toggle on wide screens. */
.theme-toggle,
.nav-toggle {
  inline-size: 2.75rem;
  block-size: 2.75rem;
  padding: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--color-text-muted);
  line-height: 0;
  cursor: pointer;
}

.theme-toggle svg,
.nav-toggle svg {
  display: block;
  inline-size: 1.25rem;
  block-size: 1.25rem;
  margin: auto;
}

.site-header.is-open .nav-toggle {
  background-color: var(--color-surface-2);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

/* Fill/border hover effects only where hover is real (no sticky hover on touch). */
@media (hover: hover) {
  .theme-toggle:hover,
  .nav-toggle:hover {
    background-color: var(--color-surface-2);
    border-color: var(--color-border-strong);
    color: var(--color-text);
  }
}

/* --------------------------------------------------------------------------
   3. Hero
   -------------------------------------------------------------------------- */
.hero {
  background-color: var(--color-bg);
  /* flow motif on top, then glows + grid. Single-valued position/size/repeat
     on purpose: gradient layers fill the box, so they ignore position. */
  background-image: var(--hero-flow), var(--gradient-hero);
  background-repeat: no-repeat;
  background-position: 72% 34%;
}

/* Narrow screens: lift the motif's hub into the hero's top padding so it
   doesn't sit behind the lead paragraph (background position only).
   Up to ~70rem the 40rem lead column still reaches the hub at 72% 34%. */
@media (max-width: 70rem) {
  .hero {
    background-position: 68% -17rem;
  }
}

.hero__eyebrow {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-caps);
  line-height: var(--lh-snug);
  text-transform: uppercase;
}

.hero__eyebrow::before {                 /* short leading rule */
  content: "";
  display: inline-block;
  inline-size: 2rem;
  block-size: 1px;
  margin-inline-end: 0.75em;
  background-color: currentColor;
  vertical-align: 0.3em;
}

.hero__title {
  margin-block-start: var(--space-5);
  font-size: var(--fs-display);
  font-weight: var(--fw-bold);
  line-height: 1.04;
  letter-spacing: var(--tracking-display);
}

/* Display subheading under the name (h1): large, but clearly a step below it. */
.hero__tagline {
  margin-block-start: var(--space-4);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

.hero__lead {
  margin-block-start: var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--fs-lg);
  line-height: 1.6;
}

.hero__meta {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
  line-height: var(--lh-snug);
}

.status-dot {
  position: relative;
  display: inline-block;
  flex: none;
  inline-size: 0.5rem;
  block-size: 0.5rem;
  border-radius: 50%;
  background-color: var(--color-success);
  box-shadow: 0 0 0 3px var(--color-success-ring);
  vertical-align: 0.08em;
}

.stat {
  padding-block-start: var(--space-4);
  border-top: 1px solid var(--color-border);
  /* short accent tick over the hairline */
  background-image: linear-gradient(var(--color-accent), var(--color-accent));
  background-repeat: no-repeat;
  background-position: 0 0;
  background-size: 2rem 2px;
}

.stat__value {
  display: block;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  line-height: 1;
  letter-spacing: var(--tracking-display);
  font-variant-numeric: tabular-nums;
}

.stat__label {
  display: block;
  margin-block-start: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  line-height: var(--lh-snug);
}

/* --------------------------------------------------------------------------
   4. Sections & heading block
   -------------------------------------------------------------------------- */
.section {
  counter-increment: section;
}

/* Alternate bands for rhythm. Inset shadows = hairlines without changing size. */
#expertise,
#projects {
  background-color: var(--color-bg-alt);
  box-shadow: inset 0 1px 0 var(--color-border), inset 0 -1px 0 var(--color-border);
}

.section__eyebrow {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-caps);
  line-height: var(--lh-snug);
  text-transform: uppercase;
}

/* "01 | ABOUT" — the number is decorative and comes from CSS only (main.js
   renders the plain label). The "/ ''" alt text keeps it out of the
   accessibility tree; browsers without that syntax use the first line. */
.section__eyebrow::before {
  content: counter(section, decimal-leading-zero);
  content: counter(section, decimal-leading-zero) / "";
  margin-inline-end: 0.75em;
  padding-inline-end: 0.75em;
  border-inline-end: 1px solid var(--color-border-strong);
  color: var(--color-text-muted);
}

.section__title {
  margin-block-start: var(--space-3);
  font-size: var(--fs-3xl);
  letter-spacing: -0.028em;
}

.section__lead {
  margin-block-start: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--fs-lg);
  line-height: 1.6;
}

/* About paragraphs: first one in ink as the summary, the rest muted. */
.about__text {
  color: var(--color-text-muted);
  font-size: var(--fs-lg);
  line-height: 1.6;
}

.about__text:first-child {
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   5. Buttons, links, tags
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  min-block-size: 2.875rem;
  padding: 0.7rem 1.35rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  overflow-wrap: anywhere;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

.btn svg {
  flex: none;
  inline-size: 1.125em;
  block-size: 1.125em;
}

.btn--primary {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-accent-contrast);
  box-shadow: var(--shadow-sm);
}

.btn--ghost {
  border-color: var(--color-border-strong);
  background-color: transparent;
  color: var(--color-text);
}

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

  .btn--primary:hover {
    border-color: var(--color-accent-hover);
    background-color: var(--color-accent-hover);
    color: var(--color-accent-contrast);
    box-shadow: var(--shadow-md);
  }

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

.link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  color: var(--color-accent);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  text-decoration-line: underline;
  text-decoration-color: transparent;
}

.link:hover {
  color: var(--color-accent-hover);
  text-decoration-color: currentColor;
}

.link svg {
  flex: none;
  inline-size: 1em;
  block-size: 1em;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  list-style: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-2);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  line-height: 1.5;
  letter-spacing: 0.01em;
}

/* --------------------------------------------------------------------------
   6. Cards (expertise)
   -------------------------------------------------------------------------- */
.card {
  padding: var(--card-pad);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

@media (hover: hover) {
  .card:hover {
    border-color: var(--color-accent-line);
    box-shadow: var(--shadow-md);
  }
}

.card__icon {
  display: inline-grid;
  place-items: center;
  inline-size: 2.75rem;
  block-size: 2.75rem;
  margin-block-end: var(--space-5);
  border-radius: var(--radius-md);
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
}

.card__icon svg {
  inline-size: 1.5rem;
  block-size: 1.5rem;
}

.card__title {
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
}

.card__text {
  margin-block-start: var(--space-3);
  color: var(--color-text-muted);
}

.card__list {
  display: grid;
  gap: var(--space-2);
  margin-block-start: var(--space-5);
  padding: var(--space-5) 0 0;
  border-top: 1px solid var(--color-border);
  list-style: none;
  font-size: var(--fs-sm);
}

.card > .tags {
  margin-block-start: var(--space-5);
}

/* Shared dash marker for custom lists */
.card__list > li,
.timeline__highlights > li {
  position: relative;
  padding-inline-start: 1.25em;
}

.card__list > li::before,
.timeline__highlights > li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: calc(var(--lh-body) * 0.5em - 1px);
  inline-size: 0.55em;
  block-size: 2px;
  border-radius: 1px;
  background-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   7. Experience timeline
   -------------------------------------------------------------------------- */
.timeline {
  /* centre of the first text line of .timeline__company */
  --timeline-dot-top: calc(var(--fs-xl) * var(--lh-snug) / 2 - var(--timeline-dot) / 2);
  padding: 0;
  list-style: none;
}

.timeline__item {
  position: relative;
  padding-inline-start: var(--timeline-gutter);
  padding-block-end: var(--space-8);   /* padding (not margin) keeps the rail continuous */
}

.timeline__item:last-child {
  padding-block-end: 0;
}

.timeline__item::before {               /* rail: this dot -> next dot */
  content: "";
  position: absolute;
  inset-inline-start: calc(var(--timeline-dot) / 2 - 1px);
  inset-block-start: calc(var(--timeline-dot-top) + var(--timeline-dot) / 2);
  inset-block-end: calc(-1 * (var(--timeline-dot-top) + var(--timeline-dot) / 2));
  inline-size: 2px;
  background-image: linear-gradient(var(--color-accent-line), var(--color-border) 70%);
}

.timeline__item:last-child::before {
  inset-block-end: 0;
  background-image: linear-gradient(var(--color-accent-line), transparent);
}

.timeline__item::after {                /* node */
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: var(--timeline-dot-top);
  box-sizing: border-box;
  inline-size: var(--timeline-dot);
  block-size: var(--timeline-dot);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  background-color: var(--color-bg);
}

.timeline__item:first-child::after {    /* most recent role */
  background-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-soft);
}

.timeline__company {
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
}

.timeline__location {
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-regular);
  letter-spacing: 0;
}

.timeline__role {
  margin-block-start: var(--space-4);
}

.timeline__role + .timeline__role {
  margin-block-start: var(--space-6);
  padding-block-start: var(--space-6);
  border-top: 1px dashed var(--color-border);
}

.timeline__title {
  color: var(--color-text);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  letter-spacing: -0.01em;
}

.timeline__dates {
  display: block;
  margin-block-start: var(--space-1);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}

.timeline__highlights {
  display: grid;
  gap: var(--space-2);
  margin-block-start: var(--space-4);
  padding: 0;
  list-style: none;
  color: var(--color-text-muted);
}

.earlier__heading {                     /* h3 "Earlier experience" */
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
}

.earlier__item {
  gap: var(--space-1);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.earlier__item > :first-child {
  color: var(--color-text);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
}

.earlier__company {
  color: var(--color-text);
  font-weight: var(--fw-medium);
}

.earlier__dates {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}

.earlier__summary {
  margin-block-start: var(--space-2);
}

/* --------------------------------------------------------------------------
   8. Projects
   -------------------------------------------------------------------------- */
.project-card {
  display: flex;
  flex-direction: column;
  padding: var(--card-pad);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

@media (hover: hover) {
  .project-card:hover {
    border-color: var(--color-accent-line);
    box-shadow: var(--shadow-md);
  }
}

.project-card__media {                   /* full-bleed image well */
  aspect-ratio: 16 / 9;
  margin: calc(-1 * var(--card-pad)) calc(-1 * var(--card-pad)) var(--space-5);
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-surface-2);
  background-image:
    repeating-linear-gradient(90deg, var(--color-grid) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(0deg, var(--color-grid) 0 1px, transparent 1px 24px);
}

.project-card__media img {
  display: block;
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.project-card__title {
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
}

.project-card__text {
  margin-block-start: var(--space-3);
  color: var(--color-text-muted);
}

.project-card > .tags {
  margin-block-start: var(--space-4);
}

.project-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  margin-block-start: auto;            /* pin to the bottom of equal-height cards */
  padding-block-start: var(--space-5);
}

/* Status pill: real DOM text rendered by main.js ("Coming soon" for
   placeholder, "In progress" for wip; live cards have none), so screen
   readers get it too. */
.project-card__status {
  align-self: flex-start;
  inline-size: fit-content;
  margin-block-end: var(--space-5);
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-2);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-caps);
  line-height: 1.5;
  text-transform: uppercase;
}

.project-card__media + .project-card__status {
  margin-block-start: calc(-1 * var(--space-2));
}

.project-card[data-status="wip"] .project-card__status {
  border-color: var(--color-accent-line);
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
}

/* Placeholder: dashed, unfilled, faint hatch. */
.project-card[data-status="placeholder"] {
  border: 1.5px dashed var(--color-border-strong);
  background-color: transparent;
  background-image: repeating-linear-gradient(-45deg, transparent 0 11px, var(--color-grid) 11px 12px);
  box-shadow: none;
}

@media (hover: hover) {
  .project-card[data-status="placeholder"]:hover {
    border-color: var(--color-accent);
    box-shadow: none;
  }
}

/* --------------------------------------------------------------------------
   9. Certifications
   -------------------------------------------------------------------------- */
.cert-group {
  padding: var(--card-pad);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.cert-group__title {
  padding-block-end: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-lg);
  line-height: var(--lh-snug);
}

/* Issuer sits under the title; the divider moves below the issuer. */
.cert-group__title:has(+ .cert-group__issuer) {
  padding-block-end: 0;
  border-bottom: 0;
}

.cert-group__issuer {
  margin-block-start: var(--space-1);
  padding-block-end: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.cert-list {
  padding: 0;
  list-style: none;
}

.cert {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-sm);
  line-height: 1.45;
}

.cert:last-child {
  padding-block-end: 0;
  border-bottom: 0;
}

.cert__name {
  color: var(--color-text);
}

.cert__date {
  flex: none;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   10. Contact & footer
   -------------------------------------------------------------------------- */
.contact-card {
  padding: clamp(1.5rem, 0.8333rem + 2.963vw, 3.5rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  background-image: radial-gradient(80% 130% at 100% 0%, var(--color-accent-soft), transparent 62%);
  box-shadow: var(--shadow-md);
}

.contact-card__text {
  max-inline-size: var(--measure);
  color: var(--color-text);
  font-size: var(--fs-lg);
  line-height: 1.6;
}

.contact-card__email {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.contact-card__email .link {
  overflow-wrap: anywhere;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.site-footer a {
  color: inherit;
  text-decoration-color: var(--color-border-strong);
}

.site-footer a:hover {
  color: var(--color-text);
  text-decoration-color: currentColor;
}

/* --------------------------------------------------------------------------
   11. Motion — only when the user has not asked for reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }

  body {
    transition: background-color var(--duration) var(--ease), color var(--duration) var(--ease);
  }

  a,
  .nav__link,
  .link,
  .theme-toggle,
  .nav-toggle {
    transition:
      color var(--duration-fast) var(--ease),
      background-color var(--duration-fast) var(--ease),
      border-color var(--duration-fast) var(--ease),
      text-decoration-color var(--duration-fast) var(--ease);
  }

  .btn {
    transition:
      color var(--duration-fast) var(--ease),
      background-color var(--duration-fast) var(--ease),
      border-color var(--duration-fast) var(--ease),
      box-shadow var(--duration) var(--ease),
      transform var(--duration-fast) var(--ease);
  }

  .btn:active {
    transform: translateY(1px);
  }

  .card,
  .project-card {
    transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
  }

  .link svg {
    transition: transform var(--duration-fast) var(--ease);
  }

  .link:hover svg {
    transform: translate(2px, -2px);
  }

  .status-dot::after {                   /* availability pulse */
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background-color: var(--color-success);
    animation: status-pulse 2.4s var(--ease-out) infinite;
  }
}

/* Reveal-on-scroll: hidden state only when motion is welcome AND scripting
   runs (main.js adds .is-visible). Unsupported query => content just shows. */
@media (prefers-reduced-motion: no-preference) and (scripting: enabled) {
  .reveal {
    opacity: 0;
    transform: translate3d(0, 1.5rem, 0);
    transition:
      opacity var(--duration-slow) var(--ease-out) var(--reveal-delay, 0ms),
      transform var(--duration-slow) var(--ease-out) var(--reveal-delay, 0ms),
      border-color var(--duration) var(--ease),
      box-shadow var(--duration) var(--ease),
      background-color var(--duration) var(--ease),
      color var(--duration) var(--ease);
  }

  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

@keyframes status-pulse {
  0% {
    opacity: 0.5;
    transform: scale(1);
  }
  80%,
  100% {
    opacity: 0;
    transform: scale(3);
  }
}

/* Safety net: neutralise any motion if reduced motion is requested. */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Print: content not yet scrolled into view must not print blank. */
@media print {
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}