/* ---------------------------------------------------------
   Joey Tan — personal site
   Swiss / International Typographic Style: black on white,
   hard rules, big type, generous whitespace, mono accents.
   --------------------------------------------------------- */

:root {
  --ink: #111;
  --paper: #fff;
  --rule: 1px solid var(--ink);
  --sans: "Helvetica Neue", Helvetica, "Inter", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --pad: clamp(1.25rem, 4vw, 3rem);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

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

::selection {
  background: var(--ink);
  color: var(--paper);
}

.mono {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---- header / nav ---- */

.site-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: baseline;
  gap: 0.5rem 1rem;
  padding: 1.1rem var(--pad);
  border-bottom: var(--rule);
}

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.5rem);
}

.site-nav a {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.15rem 0.3rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--ink);
  color: var(--paper);
}

/* ---- home ---- */

.home {
  width: 100%;
  max-width: 58rem;
  margin: 0 auto;
  padding: clamp(4rem, 12vh, 8rem) var(--pad) 6rem;
}

.intro-card {
  padding: 1.25rem 1.5rem;
  background: #f1f1f1;
  border-radius: 0.75rem;
  text-align: center;
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.identity {
  display: grid;
  grid-template-columns: 1fr clamp(6.5rem, 20vw, 10rem);
  align-items: center;
  gap: 2rem;
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.identity h1 {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.portrait {
  width: 100%;
  height: clamp(6.5rem, 20vw, 10rem);
  overflow: hidden;
  border: 1px solid #d8d8d8;
  border-radius: 50%;
}

.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transform: scale(1.4);
  transform-origin: center top;
}

.brief-intro {
  margin-top: clamp(3.5rem, 8vw, 5rem);
}

.brief-intro h2,
.contact h2 {
  display: inline-block;
  padding-bottom: 0.2rem;
  border-bottom: 3px solid #ccc;
  font-size: 1.1rem;
}

.brief-intro .tagline {
  margin-top: 1.25rem;
  max-width: 46ch;
  color: #555;
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.55;
}

.section-placeholder {
  min-height: clamp(7rem, 18vh, 11rem);
}

.social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.social-links a,
.social-links button {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
}

.social-links button {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  cursor: pointer;
}

.social-links a:hover,
.social-links a:focus-visible,
.social-links button:hover,
.social-links button:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.social-links svg {
  width: 1.65rem;
  height: 1.65rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.copy-status {
  min-height: 1.2rem;
  margin-top: 0.25rem;
  font-family: var(--mono);
  font-size: 0.7rem;
}

/* ---- inner pages ---- */

.page-title {
  padding: clamp(2.5rem, 8vh, 5rem) var(--pad);
  border-bottom: var(--rule);
}

.page-title .kicker {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.page-title h1 {
  font-size: clamp(2.5rem, 9vw, 6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  font-weight: 700;
}

.page-note {
  max-width: 52ch;
  margin-top: 1.5rem;
  color: #555;
}

/* ---- project entries ---- */

.entry {
  padding: 2.25rem var(--pad);
  border-bottom: var(--rule);
}

.entry h2 {
  font-size: clamp(1.4rem, 4vw, 2.25rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-weight: 700;
}

.entry h2 a:hover {
  background: var(--ink);
  color: var(--paper);
}

.entry p {
  margin-top: 0.75rem;
  max-width: 55ch;
  font-size: 1rem;
}

.entry .project-link {
  display: inline-block;
  margin-top: 1rem;
  border-bottom: var(--rule);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.entry .project-link:hover {
  background: var(--ink);
  color: var(--paper);
}

.entry .tags {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.entry .tags span {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: var(--rule);
  padding: 0.2rem 0.5rem;
}

/* ---- reading list ---- */

.reading-list {
  list-style: none;
}

.reading-head,
.reading-list li {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(10rem, 1fr) 4.5rem;
  gap: 0.5rem 2rem;
}

.reading-head {
  padding: 0.55rem var(--pad);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: var(--rule);
}

.reading-head span:last-child {
  text-align: center;
}

.reading-list li {
  align-items: baseline;
  padding: 0.55rem var(--pad);
  border-bottom: var(--rule);
}

.reading-list .title {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.reading-list .author {
  font-size: 0.82rem;
}

.reading-list .status {
  justify-self: center;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: var(--rule);
  padding: 0.15rem 0.4rem;
  white-space: nowrap;
}

/* ---- footer ---- */

.site-footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  padding: 1.1rem var(--pad);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-footer a:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ---- mobile ---- */

@media (max-width: 480px) {
  .reading-head {
    display: none;
  }

  .reading-list li {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.25rem 1rem;
  }

  .reading-list .author {
    grid-column: 1;
    grid-row: 2;
  }

  .reading-list .status {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
  }
}