/* Manuel Lizcano Butzmann. Personal portfolio.
   One accent, two faces, a lot of air. */

:root {
  --bg: #f6f6f3;
  --bg-2: #eeeeea;
  --ink: #15171b;
  --ink-2: #4f545c;
  --ink-3: #666b74;
  --line: #dcdcd6;
  --line-2: #c9c9c2;
  --accent: #1c7a3e;
  --accent-ink: #145c2f;
  --accent-tint: rgba(28, 122, 62, 0.10);
  --btn-bg: #15171b;
  --btn-fg: #f6f6f3;
  --shadow: 0 10px 30px -18px rgba(21, 23, 27, 0.35);

  --font-display: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --measure: 62ch;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --maxw: 1180px;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0d10;
    --bg-2: #131418;
    --ink: #ececea;
    --ink-2: #a3a7ae;
    --ink-3: #858a93;
    --line: #23252b;
    --line-2: #2f3239;
    --accent: #8ee39a;
    --accent-ink: #b6f0be;
    --accent-tint: rgba(142, 227, 154, 0.10);
    --btn-bg: #ececea;
    --btn-fg: #0c0d10;
    --shadow: 0 10px 30px -18px rgba(0, 0, 0, 0.8);
  }
}
:root[data-theme="dark"] {
  --bg: #0c0d10;
  --bg-2: #131418;
  --ink: #ececea;
  --ink-2: #a3a7ae;
  --ink-3: #858a93;
  --line: #23252b;
  --line-2: #2f3239;
  --accent: #8ee39a;
  --accent-ink: #b6f0be;
  --accent-tint: rgba(142, 227, 154, 0.10);
  --btn-bg: #ececea;
  --btn-fg: #0c0d10;
  --shadow: 0 10px 30px -18px rgba(0, 0, 0, 0.8);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-feature-settings: "ss01";
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3 { margin: 0; font-family: var(--font-display); font-weight: 700; letter-spacing: -0.03em; line-height: 1.05; text-wrap: balance; }
p { margin: 0; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--accent); }
strong { font-weight: 600; color: var(--ink); }
::selection { background: var(--accent); color: var(--bg); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute; left: 1rem; top: -3rem;
  background: var(--btn-bg); color: var(--btn-fg);
  padding: 0.5rem 0.9rem; border-radius: 6px; z-index: 100;
  transition: top 160ms var(--ease-out);
}
.skip:focus { top: 1rem; }

.wrap { width: min(100% - 2 * var(--gutter), var(--maxw)); margin-inline: auto; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 1rem; }
.brand { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; text-decoration: none; font-size: 1.05rem; white-space: nowrap; }
.brand:hover { color: var(--ink); }
.brand .mark {
  display: inline-grid; place-items: center;
  width: 28px; height: 28px; margin-right: 0.6rem; vertical-align: -7px;
  border-radius: 7px; background: var(--btn-bg); color: var(--btn-fg);
  font-size: 0.72rem; letter-spacing: 0; font-weight: 700;
}
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 1.6rem; }
.nav li a {
  font-size: 0.93rem; color: var(--ink-2); text-decoration: none;
  padding: 0.35rem 0; position: relative;
  transition: color 160ms var(--ease-out);
}
.nav li a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1.5px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform 220ms var(--ease-out);
}
.nav li a:hover, .nav li a[aria-current="true"] { color: var(--ink); }
.nav li a[aria-current="true"]::after { transform: scaleX(1); }
.nav .cv-link { font-weight: 600; color: var(--ink); }
@media (max-width: 720px) {
  .nav li:not(:last-child) { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.85rem 1.35rem; border-radius: 8px;
  font-weight: 600; font-size: 0.98rem; line-height: 1;
  text-decoration: none; white-space: nowrap;
  border: 1px solid transparent;
  transition: transform 160ms var(--ease-out), background-color 160ms var(--ease-out), border-color 160ms var(--ease-out), color 160ms var(--ease-out);
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--btn-bg); color: var(--btn-fg); }
.btn-primary:hover { color: var(--btn-fg); background: color-mix(in srgb, var(--btn-bg) 86%, var(--accent)); }
.btn-ghost { border-color: var(--line-2); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn svg { width: 16px; height: 16px; }

/* ---------- Hero ---------- */
.hero { padding: clamp(3.5rem, 9vh, 6rem) 0 0; }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 8.5fr) minmax(0, 3.5fr);
  gap: 3rem; align-items: end;
}
.hero h1 {
  font-size: clamp(2.3rem, 4.6vw, 3.9rem);
  max-width: 21ch;
  font-weight: 700;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede {
  margin-top: 1.5rem; max-width: 46ch;
  font-size: clamp(1.05rem, 1.45vw, 1.25rem); color: var(--ink-2); line-height: 1.5;
}
.hero .actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }
.hero-aside {
  align-self: end; color: var(--ink-2); font-size: 0.95rem; line-height: 1.55;
  border-left: 1px solid var(--line-2); padding-left: 1.25rem;
  max-width: 34ch;
}
.hero-aside b { display: block; color: var(--ink); font-weight: 600; }

code {
  font-family: var(--font-mono); font-size: 0.88em; color: var(--ink);
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 4px; padding: 0.05em 0.35em;
}
.numbers {
  list-style: none; padding: 0;
  margin-top: clamp(3rem, 7vh, 5rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid; grid-template-columns: repeat(5, 1fr);
}
.numbers > li {
  padding: 1.5rem 1.25rem 1.5rem 0;
  border-right: 1px solid var(--line);
}
.numbers > li + li { padding-left: 1.25rem; }
.numbers > li:last-child { border-right: 0; }
.numbers b {
  display: block; font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem); letter-spacing: -0.03em; line-height: 1; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.numbers span { display: block; margin-top: 0.5rem; color: var(--ink-2); font-size: 0.86rem; line-height: 1.35; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero-aside { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); padding-top: 1.25rem; max-width: none; }
  .numbers { grid-template-columns: repeat(2, 1fr); border-bottom: 0; }
  .numbers > li { border-right: 0; border-bottom: 1px solid var(--line); padding: 1.25rem 0; }
  .numbers > li + li { padding-left: 0; }
  .numbers > li:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 1rem; }
  .numbers > li:nth-child(even) { padding-left: 1rem; }
  .numbers > li:last-child { grid-column: 1 / -1; border-right: 0; padding-right: 0; }
}

/* ---------- Sections ---------- */
.section { padding: clamp(4.5rem, 11vh, 8rem) 0; }
.section + .section { border-top: 1px solid var(--line); }
.section h2 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); max-width: 22ch; }
.section .intro { margin-top: 1.25rem; max-width: var(--measure); color: var(--ink-2); font-size: 1.08rem; }

/* Why rare: one wide paragraph in display-ish size */
.rare p.big {
  margin-top: 2rem; max-width: 40ch;
  font-family: var(--font-display); font-weight: 500; letter-spacing: -0.015em;
  font-size: clamp(1.35rem, 2.3vw, 1.9rem); line-height: 1.32;
}
.rare p.big strong { font-weight: 700; color: var(--ink); }
.rare .pair {
  margin-top: 3rem; display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem;
  border-top: 1px solid var(--line); padding-top: 2rem;
}
.rare .pair h3 { font-size: 1.05rem; font-family: var(--font-body); font-weight: 600; letter-spacing: 0; }
.rare .pair p { margin-top: 0.6rem; color: var(--ink-2); max-width: 44ch; }
.rare .pair .tag { display: inline-block; margin-bottom: 0.65rem; font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent-ink); letter-spacing: 0.02em; }
@media (max-width: 720px) { .rare .pair { grid-template-columns: 1fr; gap: 2rem; } }

/* ---------- Case studies ---------- */
.cases .list { margin-top: 3rem; }
.case {
  display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 3rem;
  padding: 3rem 0; border-top: 1px solid var(--line);
}
.case:last-child { border-bottom: 1px solid var(--line); }
.case-head { position: sticky; top: 88px; align-self: start; }
.case-head .idx { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-3); }
.case-head h3 { margin-top: 0.6rem; font-size: clamp(1.45rem, 2.2vw, 1.85rem); max-width: 16ch; }
.case-head .result {
  margin-top: 1.5rem; padding-left: 1rem; border-left: 2px solid var(--accent);
  font-size: 0.95rem; color: var(--ink-2); max-width: 30ch; line-height: 1.5;
}
.case-head .result b { color: var(--ink); font-weight: 600; }
.case-body { max-width: var(--measure); }
.case-body h4 {
  margin: 0; font-family: var(--font-mono); font-weight: 500; font-size: 0.78rem;
  letter-spacing: 0.02em; color: var(--ink-3);
}
.case-body h4 + p, .case-body h4 + ul { margin-top: 0.6rem; }
.case-body p + p { margin-top: 1rem; }
.case-body .block + .block { margin-top: 2rem; }
.case-body p { color: var(--ink-2); }
.case-body ul { margin: 0.6rem 0 0; padding-left: 1.1rem; color: var(--ink-2); }
.case-body li + li { margin-top: 0.35rem; }
.case-body .fde { border-top: 1px dashed var(--line-2); padding-top: 1.5rem; }
.case-body .fde p { color: var(--ink); }
.also {
  margin-top: 2.5rem; max-width: var(--measure); color: var(--ink-2); font-size: 0.98rem;
}
@media (max-width: 860px) {
  .case { grid-template-columns: 1fr; gap: 1.5rem; padding: 2.5rem 0; }
  .case-head { position: static; }
  .case-head h3 { max-width: none; }
  .case-head .result { max-width: none; }
}

/* ---------- Logistics background ---------- */
.role {
  margin-top: 2.5rem; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 3rem;
  align-items: start;
}
.role .who h3 { font-size: 1.35rem; }
.role .who p { margin-top: 0.4rem; color: var(--ink-2); }
.role .who .dates { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-3); margin-top: 0.8rem; }
.facts { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem 2rem; }
.facts > div { padding-top: 1rem; border-top: 1px solid var(--line-2); }
.facts b { display: block; font-family: var(--font-display); font-size: 1.15rem; letter-spacing: -0.02em; line-height: 1.2; }
.facts p { margin-top: 0.4rem; color: var(--ink-2); font-size: 0.96rem; }
@media (max-width: 860px) { .role { grid-template-columns: 1fr; gap: 2rem; } }
@media (max-width: 560px) { .facts { grid-template-columns: 1fr; } }

/* ---------- Stack ---------- */
.stack-grid { margin-top: 2.5rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem 2.5rem; }
.stack-grid h3 { font-family: var(--font-body); font-size: 0.95rem; font-weight: 600; letter-spacing: 0; padding-bottom: 0.7rem; border-bottom: 1px solid var(--line-2); }
.chips { list-style: none; margin: 0.9rem 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.chips li {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink);
  padding: 0.4rem 0.65rem; border: 1px solid var(--line-2); border-radius: 6px; background: var(--bg-2);
}
.edu { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.edu h3 { font-family: var(--font-body); font-size: 0.95rem; font-weight: 600; letter-spacing: 0; }
.edu p { margin-top: 0.5rem; color: var(--ink-2); font-size: 0.98rem; }
.edu p b { color: var(--ink); font-weight: 600; }
@media (max-width: 860px) { .stack-grid, .edu { grid-template-columns: 1fr; } }

/* ---------- Contact ---------- */
.contact { background: var(--bg-2); }
.contact h2 { font-size: clamp(2.2rem, 5vw, 4rem); max-width: 14ch; }
.contact .intro { font-size: 1.12rem; }
.contact .email {
  display: inline-block; margin-top: 2rem;
  font-family: var(--font-display); font-weight: 600; letter-spacing: -0.02em;
  font-size: clamp(1.3rem, 3vw, 2.1rem); text-decoration: none; color: var(--ink);
  border-bottom: 2px solid var(--accent); padding-bottom: 0.1em; overflow-wrap: anywhere;
}
.contact .email:hover { color: var(--accent); }
.contact .actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2.25rem; }

footer { border-top: 1px solid var(--line); padding: 1.75rem 0 2.5rem; color: var(--ink-3); font-size: 0.86rem; }
footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* ---------- Motion ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.hero .reveal:nth-child(1) { transition-delay: 40ms; }
.hero .reveal:nth-child(2) { transition-delay: 120ms; }
.hero .reveal:nth-child(3) { transition-delay: 200ms; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .nav li a::after { transition: none; }
}
@media (hover: none) {
  .nav li a::after { display: none; }
}

@media print {
  .nav, .skip, .hero .actions, .contact .actions { display: none; }
  body { background: #fff; color: #000; }
}