/* =========================================================================
   Portfolio — styles
   Palette is defined once as CSS custom properties (tokens), then re-declared
   for dark mode. Style everything THROUGH the tokens so both themes stay in sync.
   ========================================================================= */

:root {
  --font-serif: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;

  /* light theme */
  --ground: #E7EDEA;
  --ground-2: #DBE4E0;
  --card: #FFFFFF;
  --ink: #11201C;
  --ink-2: #55635E;
  --ink-3: #84948F;
  --accent: #0C9A88;
  --accent-ink: #0A7A6C;
  --accent-soft: rgba(12, 154, 136, .10);
  --on-accent: #FFFFFF;
  --line: #D6E0DC;
  --shadow: 0 24px 60px -24px rgba(16, 32, 28, .28), 0 2px 8px -2px rgba(16, 32, 28, .10);
  --dot: 17, 32, 28;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #080D0C;
    --ground-2: #0D1514;
    --card: #121B19;
    --ink: #E9EEEC;
    --ink-2: #8F9C98;
    --ink-3: #5E6C68;
    --accent: #2FD4BE;
    --accent-ink: #46DCC7;
    --accent-soft: rgba(47, 212, 190, .12);
    --on-accent: #04120F;
    --line: #22302D;
    --shadow: 0 30px 70px -30px rgba(0, 0, 0, .7), 0 2px 10px -2px rgba(0, 0, 0, .5);
    --dot: 130, 200, 188;
  }
}

/* Explicit toggle overrides win over the OS preference in both directions. */
:root[data-theme="light"] {
  --ground: #E7EDEA; --ground-2: #DBE4E0; --card: #FFFFFF;
  --ink: #11201C; --ink-2: #55635E; --ink-3: #84948F;
  --accent: #0C9A88; --accent-ink: #0A7A6C; --accent-soft: rgba(12, 154, 136, .10);
  --on-accent: #FFFFFF; --line: #D6E0DC;
  --shadow: 0 24px 60px -24px rgba(16, 32, 28, .28), 0 2px 8px -2px rgba(16, 32, 28, .10);
  --dot: 17, 32, 28;
}
:root[data-theme="dark"] {
  --ground: #080D0C; --ground-2: #0D1514; --card: #121B19;
  --ink: #E9EEEC; --ink-2: #8F9C98; --ink-3: #5E6C68;
  --accent: #2FD4BE; --accent-ink: #46DCC7; --accent-soft: rgba(47, 212, 190, .12);
  --on-accent: #04120F; --line: #22302D;
  --shadow: 0 30px 70px -30px rgba(0, 0, 0, .7), 0 2px 10px -2px rgba(0, 0, 0, .5);
  --dot: 130, 200, 188;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--ground);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.6;
}

/* ---------- ambient background ---------- */
#bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(1100px 720px at 92% -12%, var(--accent-soft), transparent 52%),
    linear-gradient(180deg, var(--ground) 0%, var(--ground-2) 100%);
}

.wrap { position: relative; z-index: 1; }

/* ---------- theme toggle ---------- */
.theme-toggle {
  position: fixed;
  top: 1.1rem;
  right: 1.1rem;
  z-index: 5;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .5rem .9rem;
  cursor: pointer;
  transition: color .18s, border-color .18s, transform .18s;
}
.theme-toggle:hover { color: var(--accent-ink); border-color: var(--accent); transform: translateY(-1px); }

/* ---------- shared ---------- */
.shell { width: min(920px, 92vw); margin-inline: auto; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 .9rem;
}
a { color: var(--accent-ink); text-decoration: none; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---------- hero ---------- */
.hero {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 4rem 1rem 3rem;
}
.card {
  width: min(880px, 92vw);
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 176px 1fr;
}
.rail {
  border-right: 1px solid var(--line);
  padding: 2.1rem 0;
  display: flex;
  flex-direction: column;
  gap: .1rem;
}
.rail a {
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--ink-2);
  padding: .55rem 1.6rem;
  border-left: 2px solid transparent;
  transition: color .18s, border-color .18s, background .18s;
}
.rail a:hover { color: var(--ink); background: var(--accent-soft); }
.rail a[aria-current="true"] {
  color: var(--accent-ink);
  border-left-color: var(--accent);
  font-weight: 600;
}
.rail .rail-label {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 0 1.6rem 1rem;
}

.entry { padding: 2.6rem 2.8rem 2.9rem; }
.entry h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.6rem, 6vw, 3.7rem);
  line-height: 1.02;
  letter-spacing: -.01em;
  margin: .1rem 0 .5rem;
  text-wrap: balance;
}
.pron {
  font-family: var(--font-mono);
  color: var(--ink-2);
  font-size: .95rem;
  letter-spacing: .02em;
}
.pron .pos { font-style: italic; color: var(--ink-3); }
.rule { height: 1px; background: var(--line); border: 0; margin: 1.4rem 0; }
.define {
  font-family: var(--font-serif);
  font-size: 1.32rem;
  line-height: 1.45;
  color: var(--ink);
  margin: 0 0 1.1rem;
  text-wrap: pretty;
}
.define .num {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--accent-ink);
  margin-right: .5rem;
  vertical-align: .12em;
}
.bio { color: var(--ink-2); font-size: 1.02rem; margin: 0 0 1.6rem; max-width: 46ch; }
.cta-row { display: flex; flex-wrap: wrap; gap: .7rem; }
.btn {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .02em;
  padding: .62rem 1.15rem;
  border: 1px solid var(--line);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  transition: border-color .18s, color .18s, background .18s, transform .18s;
}
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent-ink); }

/* ---------- content sections ---------- */
section.block { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.sec-head { margin-bottom: 2.6rem; }
.sec-head h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 4vw, 2.5rem);
  letter-spacing: -.01em;
  margin: 0;
}
.sec-head p { color: var(--ink-2); margin: .6rem 0 0; max-width: 54ch; }

/* projects */
.projects { display: flex; flex-direction: column; gap: 1.2rem; }
.proj {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1.9rem 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: .9rem;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.proj:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.proj-top { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.proj h3 { font-family: var(--font-serif); font-weight: 500; font-size: 1.5rem; margin: 0; letter-spacing: -.01em; }
.proj .meta { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); white-space: nowrap; }
.proj .lead { color: var(--ink); margin: 0; }
.proj .note { color: var(--ink-2); margin: 0; font-size: .95rem; border-left: 2px solid var(--line); padding-left: 1rem; }
.tags { display: flex; flex-wrap: wrap; gap: .45rem; margin: .2rem 0 0; }
.tag {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--ink-2);
  background: var(--accent-soft);
  padding: .28rem .6rem;
  border-radius: 2px;
}
.proj-links { display: flex; gap: 1.4rem; margin-top: .3rem; }
.proj-links a { font-family: var(--font-mono); font-size: .82rem; display: inline-flex; align-items: center; gap: .4rem; }
.proj-links a:hover { color: var(--accent); }
.proj-links .arw { transition: transform .18s; }
.proj-links a:hover .arw { transform: translateX(3px); }

/* skills — logo chips, grouped */
.skills { display: flex; flex-direction: column; gap: 2rem; }
.skill-group h4 {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 1rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid var(--line);
}
.chips { display: flex; flex-wrap: wrap; gap: .6rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .55rem .85rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--card);
  color: var(--ink);
  transition: border-color .18s, transform .18s;
}
.chip:hover { border-color: var(--accent); transform: translateY(-1px); }
.chip .logo {
  width: 18px;
  height: 18px;
  flex: none;
  fill: var(--ink-2);
  transition: fill .18s;
}
.chip:hover .logo { fill: var(--accent); }
.chip .nm { font-family: var(--font-mono); font-size: .82rem; font-weight: 600; }
.chip .dt { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-3); }

/* contact */
.contact-card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: clamp(2rem, 5vw, 3rem);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}
.contact-card p { margin: 0; color: var(--ink-2); max-width: 42ch; }
.contact-card .define { font-size: 1.5rem; margin-bottom: .8rem; }
.contact-links { display: flex; flex-direction: column; gap: .7rem; text-align: right; }
.contact-links a { font-family: var(--font-mono); font-size: .9rem; }
.contact-links a:hover { color: var(--accent); }

footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--ink-3);
  letter-spacing: .04em;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .6rem;
}

/* reveal-on-scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .card { grid-template-columns: 1fr; }
  .rail {
    flex-direction: row;
    flex-wrap: wrap;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 1rem .6rem;
    gap: 0;
  }
  .rail .rail-label { display: none; }
  .rail a { padding: .5rem .9rem; border-left: 0; border-bottom: 2px solid transparent; }
  .rail a[aria-current="true"] { border-left: 0; border-bottom-color: var(--accent); }
  .entry { padding: 2rem 1.6rem 2.3rem; }
  .contact-card { grid-template-columns: 1fr; }
  .contact-links { text-align: left; }
}
@media (max-width: 430px) {
  .chip .dt { display: none; }
}