/* Portfolio page — loaded only by portifolio.html, builds on the tokens of yusuf-part0.css */
.pf {
  --pf-ease: cubic-bezier(0.2, 0.7, 0, 1);
  --pf-mono: "DM Mono", monospace;
  --pf-serif: "Playfair Display", serif;
  --pf-section-space: clamp(4.5rem, 10vw, 8rem);
}

.pf h1,
.pf h2,
.pf h3 {
  margin: 0;
}

.pf p {
  margin: 0;
}

.pf ul,
.pf ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.pf-kicker {
  color: var(--muted);
  font-family: var(--pf-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* Buttons */
.pf-btn {
  display: inline-flex;
  gap: 0.65rem;
  align-items: center;
  padding: 0.95rem 1.45rem;
  border: 1px solid var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease, transform 250ms var(--pf-ease);
}

.pf-btn i {
  font-size: 0.8em;
  transition: transform 250ms var(--pf-ease);
}

.pf-btn:hover i {
  transform: translateX(3px);
}

.pf-btn--solid {
  background: var(--ink);
  color: var(--paper);
}

.pf-btn--solid:hover,
.pf-btn--solid:focus-visible {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.pf-btn--ghost {
  background: transparent;
  color: var(--ink);
}

.pf-btn--ghost:hover,
.pf-btn--ghost:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.pf-btn--light {
  border-color: var(--band-ink);
  background: var(--band-ink);
  color: var(--band);
}

.pf-btn--light:hover,
.pf-btn--light:focus-visible {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.pf a:focus-visible,
.pf button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.pf-link {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--ink);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
}

.pf-link i {
  font-size: 0.75em;
}

.pf-link:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.pf-link--muted {
  border-color: var(--line);
  color: var(--ink-soft);
}

/* Chips (stack) */
.pf-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.pf-chips li,
.pf-marquee__list li {
  display: inline-flex;
  gap: 0.45rem;
  align-items: center;
  font-family: var(--pf-mono);
  letter-spacing: 0.04em;
  line-height: 1;
  text-transform: uppercase;
}

.pf-chips li {
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 0.66rem;
}

.pf-chips img {
  width: 0.9rem;
  height: 0.9rem;
}

/* Hero */
.pf-hero {
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(3rem, 7vw, 5.5rem);
}

.pf-hero__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--ink);
}

.pf-status {
  display: inline-flex;
  gap: 0.6rem;
  align-items: center;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--pf-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pf-status__dot {
  position: relative;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--success);
}

.pf-status__dot::after {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--success);
  content: "";
  animation: pf-pulse 2s ease-out infinite;
}

@keyframes pf-pulse {
  from { opacity: 0.6; transform: scale(1); }
  to { opacity: 0; transform: scale(3); }
}

.pf-name {
  display: flex;
  flex-direction: column;
  margin-block: clamp(1.75rem, 4vw, 3rem) !important;
  color: var(--ink);
  font-family: var(--pf-serif);
  font-size: clamp(3.6rem, 14vw, 11.5rem);
  line-height: 0.86;
  letter-spacing: -0.055em;
}

.pf-name__last {
  font-weight: 800;
  text-transform: uppercase;
}

.pf-name__first {
  padding-left: 0.9em;
  color: var(--accent);
  font-style: italic;
  font-weight: 600;
}

.pf-hero__body {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
  gap: clamp(2.5rem, 7vw, 6rem);
  align-items: start;
}

.pf-tagline {
  max-width: 17ch;
  margin-bottom: 1.5rem !important;
  font-family: var(--pf-serif);
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.pf-tagline em {
  color: var(--accent);
}

.pf-lead {
  max-width: 58ch;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  line-height: 1.8;
}

.pf-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.25rem;
}

.pf-portrait {
  margin: 0;
}

.pf-portrait__frame {
  position: relative;
  aspect-ratio: 5 / 6;
}

.pf-portrait__frame::before {
  position: absolute;
  inset: 0;
  background: var(--accent);
  content: "";
  transform: translate(0.9rem, 0.9rem);
  transition: transform 500ms var(--pf-ease);
}

.pf-portrait:hover .pf-portrait__frame::before {
  transform: translate(1.3rem, 1.3rem);
}

/* <picture> must not create a box: the img stays the sized child of the ratio frame */
.pf-portrait picture {
  display: contents;
}

.pf-portrait img {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 60% 28%;
  filter: grayscale(0.9) contrast(1.05);
  transition: filter 700ms var(--pf-ease);
}

.pf-portrait:hover img {
  filter: none;
}

.pf-facts {
  margin: 2rem 0 0;
  border-top: 1px solid var(--ink);
}

.pf-facts > div {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
}

.pf-facts dt {
  color: var(--muted);
  font-family: var(--pf-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pf-facts dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 700;
}

/* Tech marquee */
.pf-marquee {
  overflow: hidden;
  padding-block: 1.1rem;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.pf-marquee__track {
  display: flex;
  width: max-content;
  animation: pf-marquee 45s linear infinite;
}

.pf-marquee:hover .pf-marquee__track {
  animation-play-state: paused;
}

.pf-marquee__list {
  display: flex;
  flex-shrink: 0;
  gap: 2.75rem;
  padding-right: 2.75rem !important;
}

.pf-marquee__list li {
  color: var(--ink);
  font-size: 0.8rem;
  white-space: nowrap;
}

.pf-marquee__list img {
  width: 1.2rem;
  height: 1.2rem;
}

@keyframes pf-marquee {
  to { transform: translateX(-50%); }
}

/* Sections */
.pf-section {
  padding-top: var(--pf-section-space);
  scroll-margin-top: 5rem;
}

.pf-section__head {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: end;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
  padding-top: 1rem;
  border-top: 1px solid var(--ink);
}

.pf-section__num,
.pf-expertise__num,
.pf-step__num {
  color: var(--accent);
  font-family: var(--pf-mono);
  font-size: 0.75rem;
  font-weight: 500;
}

.pf-section__num {
  align-self: start;
  padding-top: 0.5rem;
}

.pf-section__head h2 {
  font-family: var(--pf-serif);
  font-size: clamp(2.3rem, 5.5vw, 4.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.045em;
}

.pf-section__head p {
  color: var(--muted);
  font-family: var(--pf-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-align: right;
  text-transform: uppercase;
}

/* Expertise index */
.pf-expertise__row {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr) minmax(0, 1.25fr) minmax(0, 0.95fr);
  gap: 1.25rem 2rem;
  align-items: start;
  padding: 2rem 0;
  border-bottom: 1px solid var(--line);
  transition: background-color 250ms ease;
}

.pf-expertise__row:first-child {
  border-top: 1px solid var(--line);
}

.pf-expertise__num {
  padding-top: 0.55rem;
  color: var(--muted);
  transition: color 250ms ease;
}

.pf-expertise__row h3 {
  font-family: var(--pf-serif);
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.1;
  transition: transform 350ms var(--pf-ease);
}

.pf-expertise__row h3 i {
  display: block;
  margin-bottom: 0.9rem;
  color: var(--accent);
  font-size: 1.1rem;
}

.pf-expertise__row p {
  padding-top: 0.35rem;
  color: var(--ink-soft);
  font-size: 0.93rem;
  line-height: 1.75;
}

.pf-expertise__row .pf-chips {
  padding-top: 0.35rem;
}

.pf-expertise__row:hover {
  background: linear-gradient(90deg, var(--surface), transparent);
}

.pf-expertise__row:hover .pf-expertise__num {
  color: var(--accent);
}

.pf-expertise__row:hover h3 {
  transform: translateX(0.5rem);
}

/* Projects */
.pf-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.pf-filter {
  padding: 0.55rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-soft);
  font-family: var(--pf-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}

.pf-filter:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.pf-filter.is-active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.pf-filters__empty {
  padding: 3rem 0;
  color: var(--muted);
  text-align: center;
}

.pf-project[hidden] {
  display: none !important;
}

.pf-project__visual {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--surface-soft);
}

.pf-project__visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms var(--pf-ease);
}

.pf-project:hover .pf-project__visual img {
  transform: scale(1.04);
}

.pf-project__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0;
  margin-bottom: 0.9rem !important;
  color: var(--accent-dark);
  font-family: var(--pf-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pf-project__meta li + li::before {
  margin: 0 0.6rem;
  color: var(--line);
  content: "/";
}

.pf-project .pf-chips {
  margin-top: 1.4rem;
}

.pf-project__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  margin-top: 1.75rem;
}

.pf-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  margin-bottom: clamp(3.5rem, 8vw, 6rem);
}

.pf-feature__badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.45rem 0.75rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--pf-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pf-feature h3 {
  margin-bottom: 1.1rem !important;
  font-family: var(--pf-serif);
  font-size: clamp(2.3rem, 4.8vw, 3.8rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.pf-feature p {
  color: var(--ink-soft);
  line-height: 1.8;
}

.pf-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(3rem, 6vw, 5rem) clamp(2rem, 5vw, 4rem);
  align-items: start;
}

/* Staggered columns, turned off while a filter is applied */
.pf-grid:not(.is-filtered) > .pf-card:nth-child(even) {
  margin-top: clamp(3rem, 8vw, 6rem);
}

.pf-card .pf-project__visual {
  margin-bottom: 1.5rem;
}

.pf-card__index {
  position: absolute;
  right: 1rem;
  bottom: 0.4rem;
  color: #fff;
  font-family: var(--pf-serif);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-style: italic;
  line-height: 1;
  font-variant-numeric: lining-nums;
  text-shadow: 0 2px 18px rgba(23, 23, 20, 0.35);
}

.pf-card h3 {
  margin-bottom: 0.75rem !important;
  font-family: var(--pf-serif);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.pf-card p {
  max-width: 52ch;
  color: var(--ink-soft);
  font-size: 0.94rem;
  line-height: 1.75;
}

.pf-empty {
  padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 6vw, 5rem);
  background: var(--surface-soft);
  text-align: center;
}

.pf-empty h3 {
  max-width: 20ch;
  margin: 1rem auto !important;
  font-family: var(--pf-serif);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
}

.pf-empty p {
  max-width: 50ch;
  margin: 0 auto 2rem !important;
  color: var(--ink-soft);
}

/* Method */
.pf-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2rem;
}

.pf-step {
  position: relative;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.pf-step::before {
  position: absolute;
  top: -1px;
  left: 0;
  width: 2.5rem;
  height: 3px;
  background: var(--accent);
  content: "";
  transition: width 700ms var(--pf-ease);
}

.pf-step:hover::before,
.js .pf-step.is-visible::before {
  width: 100%;
}

.pf-step h3 {
  margin: 1.1rem 0 0.7rem !important;
  font-family: var(--pf-serif);
  font-size: 1.6rem;
}

.pf-step p {
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* Contact */
.pf-contact {
  margin-top: var(--pf-section-space);
  padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 7vw, 5.5rem);
  background: var(--band);
  color: var(--band-ink);
}

.pf-contact .pf-kicker {
  color: var(--band-muted);
}

.pf-contact h2 {
  max-width: 14ch;
  margin: 1.25rem 0 clamp(2.5rem, 6vw, 4rem) !important;
  color: var(--band-ink);
  font-family: var(--pf-serif);
  font-size: clamp(2.8rem, 7.5vw, 6.2rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.pf-contact h2 em {
  color: var(--accent);
}

.pf-contact__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 2rem clamp(2rem, 6vw, 5rem);
  align-items: start;
  padding-top: 2rem;
  border-top: 1px solid var(--band-line);
}

.pf-contact__body > p {
  max-width: 44ch;
  color: var(--band-muted);
  line-height: 1.8;
}

.pf-contact__actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

.pf-magnetic {
  will-change: transform;
}

.pf-email {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  color: var(--band-ink);
  font-family: var(--pf-mono);
  font-size: 0.85rem;
}

.pf-email__copy {
  display: inline-flex;
  gap: 0.45rem;
  align-items: center;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--band-line);
  background: transparent;
  color: var(--band-muted);
  font-family: var(--pf-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: border-color 200ms ease, color 200ms ease;
}

.pf-email__copy:hover,
.pf-email__copy.is-copied {
  border-color: var(--band-ink);
  color: var(--band-ink);
}

.pf-socials {
  display: flex;
  flex-wrap: wrap;
  grid-column: 1 / -1;
  gap: 1.5rem;
}

.pf-socials a {
  color: var(--band-muted);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
}

.pf-socials a:hover {
  color: var(--band-ink);
}

.pf-socials i {
  margin-right: 0.35rem;
}

/* Scroll reveal: only hidden once site.js has flagged <html class="js"> */
.js .pf-reveal {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity 800ms var(--pf-ease), transform 800ms var(--pf-ease);
  transition-delay: var(--reveal-delay, 0ms);
}

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

/* Responsive */
@media (max-width: 991.98px) {
  .pf-expertise__row {
    grid-template-columns: 3rem minmax(0, 1fr) minmax(0, 1.4fr);
  }

  .pf-expertise__row .pf-chips {
    grid-column: 3;
    padding-top: 0;
  }

  .pf-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.5rem 2rem;
  }

  .pf-feature {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767.98px) {
  .pf-name {
    font-size: clamp(3.2rem, 18vw, 6rem);
  }

  .pf-name__first {
    padding-left: 0.6em;
  }

  .pf-hero__body {
    grid-template-columns: 1fr;
  }

  .pf-portrait {
    width: calc(100% - 1rem);
    max-width: 420px;
  }

  .pf-actions .pf-btn {
    flex: 1 1 auto;
    justify-content: center;
  }

  .pf-section__head {
    grid-template-columns: 2.5rem minmax(0, 1fr);
  }

  .pf-section__head p {
    grid-column: 2;
    text-align: left;
  }

  .pf-expertise__row {
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: 0.9rem 1rem;
    padding: 1.75rem 0;
  }

  .pf-expertise__row p,
  .pf-expertise__row .pf-chips {
    grid-column: 2;
  }

  .pf-grid {
    grid-template-columns: 1fr;
  }

  .pf-grid:not(.is-filtered) > .pf-card:nth-child(even) {
    margin-top: 0;
  }

  .pf-steps {
    grid-template-columns: 1fr;
  }

  .pf-contact {
    margin-inline: -1.15rem;
  }

  .pf-contact__body {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pf-marquee__track,
  .pf-status__dot::after {
    animation: none;
  }

  .js .pf-reveal {
    opacity: 1;
    transform: none;
  }
}