/* Layout: 960px container; white page, mint-green panels for hero and contact; serif display, clean sans body */
:root {
  --bg: #ffffff;
  --mint: #ecf7ef;
  --mint-strong: #d6efde;
  --ink: #12211a;
  --muted: #5a6b62;
  --line: #e1ebe4;
  --green: #1b7a4b;
  --on-green: #ffffff;

  --font-display: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --font-body: "Manrope", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius: 18px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c1511;
    --mint: #12211a;
    --mint-strong: #1a3125;
    --ink: #e2eee6;
    --muted: #93a79b;
    --line: #1f3228;
    --green: #7fd6a2;
    --on-green: #0c1511;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0c1511;
  --mint: #12211a;
  --mint-strong: #1a3125;
  --ink: #e2eee6;
  --muted: #93a79b;
  --line: #1f3228;
  --green: #7fd6a2;
  --on-green: #0c1511;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
dl, dd { margin: 0; }
a { color: inherit; }
em { font-style: italic; color: var(--green); }

:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 6px; }

.container {
  max-width: 960px;
  margin-inline: auto;
  padding-inline: 20px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px var(--mint-strong);
}

.nav { display: flex; align-items: center; gap: 4px; }

.nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 999px;
  transition: color 0.15s, background-color 0.15s;
}
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--mint); }

.theme-btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-left: 6px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.theme-btn:hover { border-color: var(--green); }
.theme-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.i-sun { display: none; }
:root[data-theme="dark"] .i-sun { display: block; }
:root[data-theme="dark"] .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: block; }
  :root:not([data-theme="light"]) .i-moon { display: none; }
}

/* ---------- Shared bits ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 6px 14px 6px 12px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--mint-strong);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--green);
}
.pill-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }

.lede { font-size: 1.125rem; color: var(--muted); max-width: 54ch; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: transform 0.15s, border-color 0.15s;
}
.btn:hover { transform: translateY(-1px); border-color: var(--green); }
.btn-primary { background: var(--green); border-color: var(--green); color: var(--on-green); }

.text-link {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--green);
  text-decoration: none;
  white-space: nowrap;
}
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }

/* ---------- Hero ---------- */
.hero {
  margin-top: 12px;
  background: var(--mint);
  border-radius: var(--radius);
  padding: clamp(32px, 6vw, 64px) clamp(20px, 6vw, 64px) clamp(24px, 4vw, 40px);
  display: grid;
  gap: 22px;
}

.hero h1,
.page-head h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.75rem, 1.6rem + 5vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  text-wrap: balance;
  max-width: 14ch;
}

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
  padding-top: 24px;
  border-top: 1px solid var(--mint-strong);
}
.stats div { display: flex; flex-direction: column-reverse; gap: 2px; min-width: 0; }
.stats dt { font-size: 0.8125rem; color: var(--muted); }
.stats dd {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---------- Sections ---------- */
.section { padding-block: clamp(48px, 7vw, 80px) 0; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 24px;
}

.section-head h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2rem, 1.6rem + 1.6vw, 2.5rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
}

/* Experience */
.jobs { display: grid; }
.job {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 24px;
  padding-block: 22px;
  border-top: 1px solid var(--line);
}
.job:last-child { border-bottom: 1px solid var(--line); }

.job-date {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--muted);
  padding-top: 3px;
  font-variant-numeric: tabular-nums;
}

.job h3 { font-size: 1.0625rem; font-weight: 700; margin-bottom: 6px; }
.job h3 span { font-weight: 500; color: var(--green); margin-left: 8px; }
.job p:not(.job-date) { color: var(--muted); max-width: 64ch; }

/* Project cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg);
  text-decoration: none;
  min-width: 0;
  transition: border-color 0.15s, transform 0.15s, background-color 0.15s;
}
.card:hover { border-color: var(--green); background: var(--mint); transform: translateY(-2px); }

.card-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.lang { display: inline-flex; align-items: center; gap: 7px; }
.lang::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--c); }

.card-title {
  font-weight: 700;
  font-size: 1.0625rem;
  overflow-wrap: anywhere;
}

.card-desc { color: var(--muted); font-size: 0.9375rem; flex: 1; }

.card-link { font-size: 0.875rem; font-weight: 600; color: var(--green); }

/* Skills */
.skills { display: grid; }
.skills > div {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 24px;
  padding-block: 16px;
  border-top: 1px solid var(--line);
}
.skills > div:last-child { border-bottom: 1px solid var(--line); }
.skills dt { font-family: var(--font-mono); font-size: 0.8125rem; color: var(--muted); padding-top: 5px; }
.skills dd { display: flex; flex-wrap: wrap; gap: 8px; }
.skills dd span {
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--mint);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Education */
.edu { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.edu > div { padding: 22px; border: 1px solid var(--line); border-radius: 14px; display: grid; gap: 4px; }
.edu-kind { font-family: var(--font-mono); font-size: 0.75rem; color: var(--green); text-transform: uppercase; letter-spacing: 0.08em; }
.edu-what { font-weight: 700; font-size: 1.0625rem; }
.edu-where { color: var(--muted); }

/* Contact */
.contact {
  margin-top: clamp(48px, 7vw, 80px);
  background: var(--mint);
  border-radius: var(--radius);
  padding: clamp(32px, 6vw, 56px) clamp(20px, 6vw, 64px);
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.7fr);
  gap: 32px;
  align-items: center;
}

.contact h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.75rem, 1.8rem + 4vw, 4.25rem);
  line-height: 1;
  letter-spacing: -0.02em;
}

.contact-rows { display: grid; }
.contact-rows li {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding-block: 12px;
  border-top: 1px solid var(--mint-strong);
}
.contact-rows li:first-child { border-top: 0; }

.c-kind { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); }
.c-value { font-weight: 600; text-decoration: none; overflow-wrap: anywhere; }
.c-value:hover { color: var(--green); }

.copy-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--mint-strong);
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
}
.copy-btn:hover { border-color: var(--green); }

/* ---------- Projects page ---------- */
.page-head {
  margin-top: 12px;
  background: var(--mint);
  border-radius: var(--radius);
  padding: clamp(32px, 6vw, 56px) clamp(20px, 6vw, 64px);
  display: grid;
  gap: 18px;
}

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-block: 32px 20px; }

.filter {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}
.filter:hover { border-color: var(--green); }
.filter[aria-pressed="true"] { background: var(--green); border-color: var(--green); color: var(--on-green); }
.filter .count { font-family: var(--font-mono); font-weight: 400; opacity: 0.7; margin-left: 2px; }

.more { margin-top: 28px; color: var(--muted); }

/* ---------- Footer ---------- */
.foot {
  padding-block: 40px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 560px) {
  .nav a[href$="#contact"] { display: none; }
  .cards, .edu { grid-template-columns: minmax(0, 1fr); }
  .job, .skills > div { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .job h3 span { display: block; margin-left: 0; }
  .contact-rows li { grid-template-columns: minmax(0, 1fr) auto; }
  .c-kind { grid-column: 1 / -1; }
}

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