/* =============================================
   TOKENS — black & white minimal
============================================= */
:root {
  --black:   #0A0A0A;
  --white:   #FFFFFF;
  --gray-1:  #6B6B6B;   /* muted text */
  --gray-2:  #B0B0B0;   /* faint text */
  --gray-3:  #E5E5E5;   /* rules / borders */
  --gray-bg: #F4F4F4;   /* subtle fills */

  --font: 'Inter', system-ui, -apple-system, sans-serif;

  --max-w: 1080px;
  --gutter: clamp(1.25rem, 5vw, 3rem);
  --nav-h: 64px;
}

/* =============================================
   BASE
============================================= */
body {
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  font-size: 1rem;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* =============================================
   NAV
============================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-3);
  z-index: 100;
}
.nav__logo {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
}
.nav__links { display: flex; gap: 2rem; }
.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-1);
  transition: color 0.15s;
}
.nav__links a:hover { color: var(--black); }

/* =============================================
   SECTION SHELL
============================================= */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 6rem var(--gutter);
}
.section + .section { border-top: 1px solid var(--gray-3); }

.section__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 3rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.section__title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.btn {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.6rem 1.2rem;
  border: 1.5px solid var(--black);
  color: var(--black);
  background: var(--white);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.btn:hover { background: var(--black); color: var(--white); }

/* =============================================
   INTRODUCTION
============================================= */
.intro {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-h) + 3rem);
}
.intro__box {
  display: grid;
  grid-template-columns: 300px 1fr;
  width: 100%;
  border: 1.5px solid var(--black);
}
.intro__photo {
  position: relative;
  background: var(--gray-bg);
  border-right: 1.5px solid var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
}
.intro__photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.intro__photo img[src=""],
.intro__photo img:not([src]) { display: none; }
.intro__photo-placeholder {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-2);
  text-align: center;
  line-height: 1.5;
}

.intro__about {
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.intro__greeting {
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  height: 1.05em;
  overflow: hidden;
  margin-bottom: 1.25rem;
}
.intro__greeting-word {
  display: inline-block;
  transform: translateY(0);
  opacity: 1;
  transition: transform 0.5s cubic-bezier(0.65, 0, 0.35, 1), opacity 0.4s ease;
}
.intro__greeting-word--out {
  transform: translateY(100%);
  opacity: 0;
}
.intro__greeting-word--in {
  transform: translateY(-100%);
  opacity: 0;
}
.intro__role {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--gray-1);
  margin-bottom: 1.5rem;
}
.intro__text {
  color: var(--gray-1);
  margin-bottom: 1rem;
  max-width: 52ch;
}
.intro__text:last-child { margin-bottom: 0; }

/* =============================================
   PROJECTS GRID (shared)
============================================= */
.projects__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.projects__grid--full {
  grid-template-columns: repeat(3, 1fr);
}

.project-card {
  border: 1.5px solid var(--gray-3);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s;
}
.project-card:hover {
  border-color: var(--black);
  transform: translateY(-3px);
}
.project-card:focus-visible {
  outline: 1.5px solid var(--black);
  outline-offset: 3px;
}
.project-card__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--gray-bg);
  margin-bottom: 1.25rem;
  border: 1px solid var(--gray-3);
}
.project-card__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
}
.project-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.project-card__year {
  font-size: 0.85rem;
  color: var(--gray-2);
  font-weight: 500;
  white-space: nowrap;
}
.project-card__desc {
  font-size: 0.95rem;
  color: var(--gray-1);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}
.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.project-card__tags span {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  background: var(--gray-bg);
  color: var(--gray-1);
}
.project-card__link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--black);
  border-bottom: 1.5px solid var(--black);
  align-self: flex-start;
  padding-bottom: 1px;
  transition: opacity 0.15s;
}
.project-card__link:hover { opacity: 0.6; }

/* =============================================
   PROJECTS PAGE
============================================= */
.projects-page { padding-top: calc(var(--nav-h) + 4rem); }
.projects-page__sub {
  color: var(--gray-1);
  margin-top: 0.5rem;
}

/* =============================================
   PROJECT DETAIL PAGE
============================================= */
.project-page { padding-top: calc(var(--nav-h) + 4rem); }
.project-page__meta {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-2);
  margin-top: 0.5rem;
}
.project-page__hero {
  border: 1px solid var(--gray-3);
  margin-bottom: 2.5rem;
}
.project-page__img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--gray-bg);
}
.project-page__body {
  max-width: none;
}
.project-page__desc {
  color: var(--gray-1);
  margin-bottom: 1.25rem;
}
.project-page__body .project-card__tags { margin-bottom: 1.75rem; }

/* =============================================
   CONTACT
============================================= */
.contact__sub {
  color: var(--gray-1);
  max-width: 46ch;
  margin-bottom: 2.5rem;
}
.contact__list {
  display: flex;
  flex-direction: column;
}
.contact__list li {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--gray-3);
}
.contact__list li:last-child { border-bottom: 1px solid var(--gray-3); }
.contact__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-2);
  width: 90px;
  flex-shrink: 0;
}
.contact__value {
  font-size: 1.1rem;
  font-weight: 500;
  transition: opacity 0.15s;
}
.contact__value:hover { opacity: 0.55; }

/* =============================================
   FOOTER
============================================= */
.footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem var(--gutter);
  border-top: 1px solid var(--gray-3);
  font-size: 0.85rem;
  color: var(--gray-2);
}

/* =============================================
   RESPONSIVE
============================================= */
@media (max-width: 860px) {
  .intro__box { grid-template-columns: 1fr; }
  .intro__photo {
    border-right: none;
    border-bottom: 1.5px solid var(--black);
    min-height: 280px;
  }
  .intro__about { padding: 2rem; }
  .projects__grid,
  .projects__grid--full { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .nav__links { gap: 1.25rem; }
  .nav__links a { font-size: 0.85rem; }
  .section { padding: 4rem var(--gutter); }
  .contact__list li { flex-direction: column; align-items: flex-start; gap: 0.25rem; }
  .contact__label { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* =============================================
   SCROLL REVEAL
============================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(70px) scale(0.94);
  transition: opacity 1.1s cubic-bezier(0.16, 1, 0.3, 1),
              transform 1.1s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
[data-reveal="left"]  { transform: translateX(-90px) scale(0.94); }
[data-reveal="right"] { transform: translateX(90px) scale(0.94); }
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}