/* sambawa.dev: monotone charcoal, anchored on #303030.
   Zero chroma is the palette: hierarchy comes from lightness, weight, and space. */

:root {
  /* dark (native theme) */
  --bg: #303030;
  --surface: #3a3a3a;
  --surface-2: #444444;
  --line: #4d4d4d;
  --line-strong: #5c5c5c;
  --ink: #efefef;
  --text: #d4d4d4;
  --muted: #ababab;
  --primary-btn-bg: #efefef;
  --primary-btn-ink: #262626;
  --focus: #ffffff;
  --cal-0: #494949;
  --cal-1: #0e4429;
  --cal-2: #006d32;
  --cal-3: #26a641;
  --cal-4: #39d353;
  --shadow: none;

  --font-sans: "Hanken Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-mono: "Fragment Mono", Consolas, ui-monospace, monospace;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --section-gap: clamp(4.5rem, 10vw, 8rem);

  --w-body: 400;
  --radius: 6px;
}

:root[data-theme="light"] {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-2: #f0f0f0;
  --line: #e0e0e0;
  --line-strong: #c8c8c8;
  --ink: #262626;
  --text: #3c3c3c;
  --muted: #6a6a6a;
  --primary-btn-bg: #303030;
  --primary-btn-ink: #f5f5f5;
  --focus: #303030;
  --cal-0: #e4e4e4;
  --cal-1: #9be9a8;
  --cal-2: #40c463;
  --cal-3: #30a14e;
  --cal-4: #216e39;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 4px 16px rgba(0,0,0,.05);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: var(--w-body);
  line-height: 1.65;
  letter-spacing: 0.008em;
  -webkit-font-smoothing: antialiased;
}
/* Text metrics are identical in both themes so toggling never reflows the page. */

.mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}

a { color: var(--ink); text-decoration-color: var(--line-strong); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--ink); }

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

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

/* ---------- shell ---------- */

.site-header,
main,
.site-footer {
  max-width: 56rem;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

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

.site-header {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding-block: var(--space-6);
}

.wordmark {
  font-weight: 750;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}
.wordmark .tld { color: var(--muted); font-weight: 400; }

.site-nav { display: flex; gap: var(--space-4); }
.site-nav a {
  font-size: 0.9375rem;
  color: var(--muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-1);
}
.site-nav a:hover { color: var(--ink); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--line-strong); }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
:root[data-theme="light"] .icon-sun { display: none; }
:root[data-theme="light"] .icon-moon { display: block; }

@media (max-width: 640px) {
  .site-nav { display: none; } /* page is short; scrolling beats a menu */
}

/* ---------- hero ---------- */

.hero { padding-block: clamp(3.5rem, 9vw, 6.5rem) 0; }

.hero-status {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-size: clamp(2.75rem, 7vw, 4.75rem);
  font-weight: 780;
  letter-spacing: -0.025em;
  line-height: 1.02;
  color: var(--ink);
  text-wrap: balance;
}

.hero-intro {
  margin: var(--space-6) 0 0;
  max-width: 34rem;
  font-size: 1.125rem;
  text-wrap: pretty;
}

.hero-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-8) 0 0;
  padding: 0;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-4);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 550;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 140ms ease-out, background-color 140ms ease-out;
}
.link-btn:hover { border-color: var(--ink); }
.link-btn.primary {
  background: var(--primary-btn-bg);
  border-color: var(--primary-btn-bg);
  color: var(--primary-btn-ink);
}
.link-btn.primary:hover { opacity: 0.92; }
.arrow { color: inherit; opacity: 0.7; }

.stack {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-8) 0 0;
  padding: 0;
}
.stack li {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
}

/* ---------- sections ---------- */

section.projects, section.about, section.resume { margin-top: var(--section-gap); }

h2 {
  margin: 0 0 var(--space-6);
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--ink);
  text-wrap: balance;
}

/* ---------- projects ---------- */

.telemetry {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}
.telemetry-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--muted);
  flex: none;
}
.telemetry-dot[data-state="loading"] { animation: pulse 1.2s ease-in-out infinite; }
.telemetry-dot[data-state="live"] { background: var(--ink); }
.telemetry-dot[data-state="cached"] { background: var(--cal-2); }
.telemetry-dot[data-state="error"] { background: transparent; border: 1.5px solid var(--muted); }
@keyframes pulse { 50% { opacity: 0.25; } }
@media (prefers-reduced-motion: reduce) {
  .telemetry-dot[data-state="loading"] { animation: none; }
}

.project-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin: 0;
  padding: 0;
}

.project-card {
  position: relative; /* anchor for the stretched title link below */
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color 140ms ease-out, transform 140ms ease-out;
}
/* the title link's hit area covers the whole card (its ::after is the arrow glyph,
   so the overlay uses ::before) */
.card-head a::before {
  content: "";
  position: absolute;
  inset: 0;
}
.project-card:hover { border-color: var(--line-strong); transform: translateY(-2px); }
@media (prefers-reduced-motion: reduce) {
  .project-card, .project-card:hover { transform: none; transition: none; }
}

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}
.card-head h3 { margin: 0; font-size: 1.1875rem; font-weight: 700; letter-spacing: -0.01em; }
.card-head a { text-decoration: none; }
.card-head a:hover { text-decoration: underline; text-underline-offset: 4px; }
.card-head a::after { content: " ↗"; font-size: 0.8em; color: var(--muted); }
.card-meta { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }

.card-desc { margin: 0; font-size: 0.975rem; color: var(--text); flex: 1; text-wrap: pretty; }
.card-foot { margin: 0; color: var(--muted); }

.telemetry-note { font-size: 0.875rem; color: var(--muted); margin-top: var(--space-4); }

/* ---------- about + activity ---------- */

.about p { max-width: 62ch; margin: 0 0 var(--space-4); text-wrap: pretty; }

.activity {
  margin-top: var(--space-8);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-6);
}
/* one inner column, sized to the calendar grid and centered in the card:
   title, grid, and summary all share the same left edge */
.activity-inner {
  width: max-content;
  max-width: 100%;
  margin-inline: auto;
}
.activity-title {
  margin: 0 0 var(--space-3);
  font-weight: 400;
  color: var(--muted);
}
.calendar-scroll { overflow-x: auto; padding-bottom: var(--space-2); }
.calendar {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 10px);
  gap: 3px;
  width: max-content;
}
.calendar i {
  width: 10px; height: 10px;
  border-radius: 2px;
  background: var(--cal-0);
}
.calendar i[data-l="1"] { background: var(--cal-1); }
.calendar i[data-l="2"] { background: var(--cal-2); }
.calendar i[data-l="3"] { background: var(--cal-3); }
.calendar i[data-l="4"] { background: var(--cal-4); }
.activity-summary { margin: var(--space-3) 0 0; color: var(--muted); }
.activity-summary a { color: var(--muted); }

/* ---------- resume ---------- */

.resume-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.resume-head h2 { margin: 0; }

/* PDF-embed look: white letter-proportioned serif paper, presented inside the
   same bordered card treatment as the project cards. Paper stays white in BOTH
   themes; that's what makes it read as a PDF. */

.pdf-frame {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-6);  /* same padding as every other bordered card */
  max-width: fit-content;   /* hug the paper instead of spanning the column */
  margin-inline: auto;
}

.sheet {
  background: #ffffff;
  color: #1b1b1b;
  border: 1px solid #dcdcdc;
  font-family: Georgia, "Times New Roman", serif;
  max-width: 43rem;
  margin-inline: auto;
  box-shadow: 0 2px 6px rgba(0,0,0,.22), 0 10px 28px rgba(0,0,0,.18);
  padding: clamp(1.25rem, 5vw, 3.25rem);
  box-sizing: border-box;
}
/* letter-page proportion only where the paper is wide enough for its content
   to fit inside it; on narrow screens the paper grows with the text instead */
@media (min-width: 760px) {
  .sheet { aspect-ratio: 8.5 / 11; height: auto; }
}

.sheet .mono {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.8125rem;
  font-style: italic;
  letter-spacing: 0;
}

.sheet-header { text-align: center; margin-bottom: var(--space-8); }
.sheet-name {
  margin: 0;
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-variant-caps: small-caps;
  color: #111111;
}
.sheet-contact { margin: var(--space-2) 0 0; color: #3d3d3d; overflow-wrap: anywhere; font-style: normal; }
.sheet-contact a { color: #3d3d3d; text-decoration-color: #b8b8b8; }
.sheet-contact a:hover { text-decoration-color: #3d3d3d; }

.sheet-section { margin-top: var(--space-6); }
.sheet-section h3 {
  margin: 0 0 var(--space-3);
  padding-bottom: 2px;
  border-bottom: 1px solid #111111;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  font-variant-caps: small-caps;
  color: #111111;
}

.skill-lines { display: grid; gap: var(--space-1); }
.skill-lines p { margin: 0; font-size: 0.9375rem; color: #222222; }
.skill-lines strong { font-weight: 700; color: #111111; }

.sheet-entry { margin-bottom: var(--space-4); }
.sheet-entry:last-child { margin-bottom: 0; }
.entry-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.entry-line strong { font-weight: 700; color: #111111; font-size: 1rem; }
.entry-when { color: #3d3d3d; font-variant-numeric: tabular-nums; }
.entry-org { margin: 0.1rem 0 var(--space-1); font-style: italic; font-size: 0.9375rem; color: #3d3d3d; }
.sheet-entry ul { margin: var(--space-1) 0 0; padding-left: 1.1rem; font-size: 0.9375rem; color: #222222; }
.sheet-entry li { margin-bottom: var(--space-1); }

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

.site-footer {
  margin-top: var(--section-gap);
  padding-block: var(--space-12) var(--space-8);
  border-top: 1px solid var(--line);
}
.site-footer h2 { margin-bottom: var(--space-4); }
.footer-line { margin: 0 0 var(--space-1); color: var(--muted); }
.footer-mail {
  font-size: clamp(1.25rem, 3.5vw, 1.75rem);
  font-weight: 650;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: var(--space-6) 0 0;
  padding: 0;
}
.footer-links a { color: var(--muted); font-size: 0.9375rem; padding-block: var(--space-2); }
.footer-links a:hover { color: var(--ink); }
.fineprint { margin: var(--space-8) 0 0; color: var(--muted); }

/* ---------- entrance (hero only, one quiet moment) ---------- */

@media (prefers-reduced-motion: no-preference) {
  .hero > * {
    animation: rise 640ms cubic-bezier(0.19, 1, 0.22, 1) backwards;
  }
  .hero > *:nth-child(2) { animation-delay: 60ms; }
  .hero > *:nth-child(3) { animation-delay: 120ms; }
  .hero > *:nth-child(4) { animation-delay: 180ms; }
  .hero > *:nth-child(5) { animation-delay: 240ms; }
  @keyframes rise {
    from { opacity: 0; transform: translateY(14px); }
  }
  .card-desc.swap, .card-meta.swap, .card-foot .swap {
    animation: fadein 400ms ease-out;
  }
  @keyframes fadein { from { opacity: 0; } }
}