/* ============================================================
   Otoniel Pérez — portfolio
   Palette : ink / panel / rule / bone / dust / signal / live
   Type    : Saira Condensed (display) · IBM Plex Sans (body)
             IBM Plex Mono (data)
   ============================================================ */

:root {
  --ink:      #0C1110;
  --ink-deep: #070A0A;
  --panel:    #141A19;
  --panel-2:  #19211F;
  --rule:     #26302E;
  --rule-soft:#1B2322;
  --bone:     #E4E7E2;
  --dust:     #8D9A95;
  --dust-dim: #6B7873;
  --signal:   #F0A202;
  --signal-d: #B87B02;
  --live:     #3FD8B4;

  --rail: 11rem;
  --gut: clamp(20px, 5vw, 64px);
  --maxw: 1140px;

  --f-display: "Saira Condensed", "Oswald", "Arial Narrow", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", ui-sans-serif, system-ui, "Segoe UI", Roboto, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;

  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--bone);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }

a { color: var(--live); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

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

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--signal); color: var(--ink);
  padding: 10px 16px; font-family: var(--f-mono); font-size: 13px; z-index: 99;
}
.skip:focus { left: 8px; top: 8px; }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
}

/* ---------- shared type atoms ---------- */

.mono {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
}

.label {
  font-family: var(--f-mono);
  font-size: 0.69rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dust-dim);
}

h1, h2, h3, h4 { text-wrap: balance; margin: 0; }

/* ============================================================
   NAV
   ============================================================ */

.nav {
  position: sticky; top: 0; z-index: 40;
  background: var(--ink);
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; height: 58px;
}
.nav__brand {
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--bone); font-family: var(--f-display);
  font-weight: 800; font-size: 1.05rem; letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav__brand:hover { text-decoration: none; color: var(--signal); }
.nav__mark {
  font-family: var(--f-mono); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.05em;
  border: 1px solid var(--signal); color: var(--signal);
  padding: 2px 5px; line-height: 1;
}
.nav__links { display: flex; align-items: center; gap: 1.6rem; }
.nav__links a {
  font-family: var(--f-mono); font-size: 0.72rem;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--dust);
}
.nav__links a:hover { color: var(--bone); text-decoration: none; }
.nav__links a.is-active { color: var(--signal); }
.nav__cta {
  border: 1px solid var(--rule); padding: 6px 12px;
}
.nav__cta:hover { border-color: var(--signal); color: var(--signal) !important; }

@media (max-width: 820px) {
  .nav__links a:not(.nav__cta) { display: none; }
}

/* ============================================================
   HERO — front panel
   ============================================================ */

.hero {
  padding-block: clamp(3.5rem, 9vw, 7rem) clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--rule-soft);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(240,162,2,0.07), transparent 58%),
    radial-gradient(90% 70% at 92% 10%, rgba(63,216,180,0.05), transparent 60%);
}

.hero__kicker {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem;
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}
.hero__kicker .label { color: var(--dust); }

.hero__name {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(3.4rem, 15vw, 9.5rem);
  line-height: 0.86;
  letter-spacing: -0.012em;
  text-transform: uppercase;
  margin: 0;
}
.hero__name span { color: var(--signal); }

.hero__bar {
  height: 3px; background: var(--signal);
  margin-block: clamp(1rem, 2.5vw, 1.6rem) 0;
  transform-origin: left center;
}

.hero__role {
  font-family: var(--f-mono);
  font-size: clamp(0.82rem, 2.1vw, 1rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bone);
  margin: 0.85rem 0 0;
}
.hero__role em { color: var(--dust); font-style: normal; }

.hero__pitch {
  max-width: 62ch;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  color: var(--bone);
}
.hero__pitch strong { color: var(--signal); font-weight: 600; }

.hero__actions {
  display: flex; flex-wrap: wrap; gap: 0.75rem;
  margin-top: 1.9rem;
}

/* front-panel strip */
.panel {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  border: 1px solid var(--rule);
  background: var(--panel);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.panel > div {
  padding: 0.95rem 1.1rem;
  border-right: 1px solid var(--rule);
  min-width: 0;
}
.panel > div:last-child { border-right: 0; }
.panel dt { margin: 0 0 0.35rem; }
.panel dd {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
  color: var(--bone);
  overflow-wrap: anywhere;
}
.panel dd b { color: var(--signal); font-weight: 500; }

.tally {
  display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--live); margin-right: 7px; vertical-align: 1px;
  box-shadow: 0 0 0 0 rgba(63,216,180,0.55);
  animation: tally 2.4s ease-out infinite;
}
@keyframes tally {
  0%   { box-shadow: 0 0 0 0 rgba(63,216,180,0.5); }
  70%  { box-shadow: 0 0 0 7px rgba(63,216,180,0); }
  100% { box-shadow: 0 0 0 0 rgba(63,216,180,0); }
}

@media (max-width: 780px) {
  .panel { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .panel > div:nth-child(2n) { border-right: 0; }
  .panel > div:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
}
@media (max-width: 420px) {
  .panel { grid-template-columns: minmax(0, 1fr); }
  .panel > div { border-right: 0; border-bottom: 1px solid var(--rule); }
  .panel > div:last-child { border-bottom: 0; }
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--f-mono); font-size: 0.76rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  padding: 0.72rem 1.15rem;
  border: 1px solid var(--rule);
  color: var(--bone); background: transparent;
  transition: border-color .15s, color .15s, background-color .15s;
}
.btn:hover { text-decoration: none; border-color: var(--bone); }
.btn--primary {
  background: var(--signal); border-color: var(--signal); color: var(--ink);
  font-weight: 500;
}
.btn--primary:hover {
  background: transparent; color: var(--signal); border-color: var(--signal);
}
.btn--onsignal {
  border-color: rgba(12,17,16,0.35); color: var(--ink);
}
.btn--onsignal:hover { border-color: var(--ink); background: var(--ink); color: var(--signal); }

/* ============================================================
   SECTION SHELL — rail + column
   ============================================================ */

.section { border-bottom: 1px solid var(--rule-soft); scroll-margin-top: 58px; }
.section > .wrap { padding-block: clamp(3.25rem, 7vw, 5.5rem); }

.sec {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
.sec__rail { position: sticky; top: 82px; }
.sec__rail h2 {
  font-family: var(--f-display); font-weight: 800;
  font-size: 1.6rem; line-height: 1.05; letter-spacing: 0.01em;
  text-transform: uppercase; color: var(--bone);
  padding-top: 0.15rem;
  border-top: 2px solid var(--signal);
  margin-top: 0.4rem;
}
.sec__meta {
  display: block; margin-top: 0.5rem;
  font-family: var(--f-mono); font-size: 0.7rem;
  color: var(--dust-dim); letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 880px) {
  .sec { grid-template-columns: minmax(0, 1fr); gap: 1.6rem; }
  .sec__rail { position: static; }
  .sec__rail h2 { font-size: 1.45rem; }
}

/* ============================================================
   PROFILE — two columns of prose, hairline between
   ============================================================ */

.split {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.75rem, 4vw, 3rem);
}
.split > div + div {
  border-left: 1px solid var(--rule-soft);
  padding-left: clamp(1.75rem, 4vw, 3rem);
}
@media (max-width: 720px) {
  .split { grid-template-columns: minmax(0, 1fr); }
  .split > div + div {
    border-left: 0; padding-left: 0;
    border-top: 1px solid var(--rule-soft); padding-top: 1.75rem;
  }
}

.split h3 {
  font-family: var(--f-display); font-weight: 700;
  font-size: 1.3rem; text-transform: uppercase; letter-spacing: 0.02em;
  margin-bottom: 0.7rem;
}
.split p { margin: 0 0 1rem; color: var(--dust); max-width: 46ch; }
.split p strong { color: var(--bone); font-weight: 500; }

.inline-list {
  list-style: none; margin: 0; padding: 0;
  font-family: var(--f-mono); font-size: 0.74rem;
  letter-spacing: 0.06em; color: var(--dust-dim);
  display: flex; flex-wrap: wrap; gap: 0.35rem 0;
}
.inline-list li::after { content: " · "; color: var(--rule); }
.inline-list li:last-child::after { content: ""; }
.inline-list li { padding-right: 0.35rem; }

/* ============================================================
   LIBRETRACKS FEATURE
   ============================================================ */

.feature__head {
  display: flex; flex-wrap: wrap; align-items: flex-end;
  justify-content: space-between; gap: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
}
.feature__name {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(2.4rem, 6vw, 3.6rem); line-height: 0.95;
  text-transform: uppercase; letter-spacing: 0.005em;
}
.feature__tag { margin: 0.5rem 0 0; color: var(--dust); max-width: 44ch; }
.feature__links { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.stats {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--rule);
}
.stats li {
  padding: 1.1rem 1rem 1.1rem 0;
  border-right: 1px solid var(--rule-soft);
}
.stats li:last-child { border-right: 0; }
.stats li:not(:first-child) { padding-left: 1rem; }
.stats b {
  display: block;
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1;
  color: var(--signal); font-variant-numeric: tabular-nums;
}
.stats span {
  display: block; margin-top: 0.4rem;
  font-family: var(--f-mono); font-size: 0.68rem;
  letter-spacing: 0.13em; text-transform: uppercase; color: var(--dust-dim);
}
@media (max-width: 620px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats li:nth-child(2n) { border-right: 0; }
  .stats li:nth-child(-n+2) { border-bottom: 1px solid var(--rule-soft); }
}

/* figure plates */
.plate { margin: 0; }
.plate img {
  width: 100%; height: auto;
  border: 1px solid var(--rule);
  background: var(--ink-deep);
}
.plate figcaption {
  display: flex; gap: 0.7rem; align-items: baseline;
  margin-top: 0.65rem;
  font-family: var(--f-mono); font-size: 0.72rem;
  color: var(--dust-dim); line-height: 1.5;
}
.plate figcaption b {
  color: var(--signal); font-weight: 500;
  letter-spacing: 0.1em; white-space: nowrap;
}
.plate--hero { margin-top: clamp(1.75rem, 4vw, 2.5rem); }

.plates {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}
@media (max-width: 720px) { .plates { grid-template-columns: minmax(0, 1fr); } }

.feature__body {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: clamp(2.25rem, 5vw, 3.25rem);
  align-items: start;
}
@media (max-width: 880px) {
  .feature__body { grid-template-columns: minmax(0, 1fr); }
}

.prose h4 {
  font-family: var(--f-mono); font-size: 0.72rem;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--signal);
  margin: 1.9rem 0 0.5rem;
}
.prose h4:first-child { margin-top: 0; }
.prose p { margin: 0; color: var(--dust); max-width: 58ch; }
.prose p em { color: var(--bone); font-style: italic; }
.prose p strong { color: var(--bone); font-weight: 500; }

.diagram {
  margin: 0; border: 1px solid var(--rule); background: var(--panel);
  padding: 1.1rem 1.1rem 0.9rem;
}
.diagram svg { width: 100%; height: auto; display: block; }
.diagram figcaption {
  margin-top: 0.85rem; padding-top: 0.75rem;
  border-top: 1px solid var(--rule-soft);
  font-family: var(--f-mono); font-size: 0.68rem; line-height: 1.6;
  color: var(--dust-dim);
}
.d-title { font-family: var(--f-mono); font-size: 11px; font-weight: 500; fill: var(--bone); letter-spacing: 0.04em; }
.d-title--accent { fill: var(--signal); }
.d-sub { font-family: var(--f-mono); font-size: 9px; fill: var(--dust-dim); }
.d-edge { font-family: var(--f-mono); font-size: 8.5px; fill: var(--dust-dim); letter-spacing: 0.08em; }
.d-rt { font-family: var(--f-mono); font-size: 8.5px; fill: var(--signal); letter-spacing: 0.04em; }

.stack {
  margin-top: clamp(2rem, 4vw, 2.75rem);
  padding-top: 1.1rem;
  border-top: 1px solid var(--rule);
  display: flex; flex-wrap: wrap; gap: 0.4rem 0;
  font-family: var(--f-mono); font-size: 0.74rem;
  list-style: none; padding-inline: 0;
  color: var(--dust);
}
.stack li { padding-right: 0.6rem; }
.stack li::after { content: " /"; color: var(--rule); padding-left: 0.6rem; }
.stack li:last-child::after { content: ""; }

/* ============================================================
   PROJECT ROWS
   ============================================================ */

.rows { list-style: none; margin: 0; padding: 0; }
.rows > li {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr) 9rem;
  gap: 1.25rem;
  padding-block: 1.6rem;
  border-top: 1px solid var(--rule-soft);
}
.rows > li:first-child { border-top: 0; padding-top: 0; }
.row__idx {
  font-family: var(--f-mono); font-size: 0.72rem; color: var(--dust-dim);
  font-variant-numeric: tabular-nums; padding-top: 0.35rem;
}
.row__body h3 {
  font-family: var(--f-display); font-weight: 700;
  font-size: 1.45rem; text-transform: uppercase; letter-spacing: 0.015em;
  line-height: 1.1;
}
.row__body h3 a { color: var(--bone); }
.row__body h3 a:hover { color: var(--signal); text-decoration: none; }
.row__body p { margin: 0.5rem 0 0; color: var(--dust); max-width: 62ch; }
.row__body p strong { color: var(--bone); font-weight: 500; }
.row__meta {
  font-family: var(--f-mono); font-size: 0.72rem; color: var(--dust-dim);
  text-align: right; padding-top: 0.4rem; line-height: 1.8;
}
.row__meta span { display: block; }
.row__meta .row__lang { color: var(--live); }

@media (max-width: 760px) {
  .rows > li { grid-template-columns: 2.5rem minmax(0, 1fr); }
  .row__meta { grid-column: 2; text-align: left; padding-top: 0.7rem; }
  .row__meta span { display: inline; }
  .row__meta span + span::before { content: " · "; color: var(--rule); }
}

/* ============================================================
   TIMELINE
   ============================================================ */

.tl { list-style: none; margin: 0; padding: 0; }
.tl > li {
  display: grid;
  grid-template-columns: 9.5rem minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2.25rem);
  padding-block: 1.9rem;
  border-top: 1px solid var(--rule-soft);
}
.tl > li:first-child { border-top: 0; padding-top: 0; }
.tl__when {
  font-family: var(--f-mono); font-size: 0.74rem;
  font-variant-numeric: tabular-nums; color: var(--signal);
  letter-spacing: 0.04em; padding-top: 0.45rem;
}
.tl__when em { display: block; color: var(--dust-dim); font-style: normal; margin-top: 0.3rem; }
.tl h3 {
  font-family: var(--f-display); font-weight: 700;
  font-size: 1.45rem; text-transform: uppercase; letter-spacing: 0.015em; line-height: 1.15;
}
.tl__org {
  margin: 0.3rem 0 0;
  font-family: var(--f-mono); font-size: 0.76rem; color: var(--dust);
  letter-spacing: 0.04em;
}
.tl__what ul {
  margin: 1.1rem 0 0; padding: 0; list-style: none;
  display: grid; gap: 0.7rem;
}
.tl__what ul li {
  position: relative; padding-left: 1.15rem;
  color: var(--dust); max-width: 68ch;
}
.tl__what ul li::before {
  content: ""; position: absolute; left: 0; top: 0.68em;
  width: 5px; height: 1px; background: var(--signal-d);
}
.tl__what ul li b { color: var(--bone); font-weight: 600; }
.tl__what ul li em { color: var(--bone); font-style: italic; }

@media (max-width: 760px) {
  .tl > li { grid-template-columns: minmax(0, 1fr); gap: 0.9rem; }
  .tl__when { padding-top: 0; }
  .tl__when em { display: inline; margin-left: 0.5rem; }
}

/* ============================================================
   SPEC SHEET (skills)
   ============================================================ */

.spec { display: grid; gap: 0; }
.spec > div {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  padding-block: 1.05rem;
  border-top: 1px solid var(--rule-soft);
  align-items: baseline;
}
.spec > div:first-child { border-top: 0; padding-top: 0; }
.spec dt { color: var(--dust); font-family: var(--f-mono); font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; }
.spec dd {
  margin: 0; color: var(--bone);
  font-family: var(--f-mono); font-size: 0.82rem; line-height: 1.9;
}
.spec dd i { color: var(--rule); font-style: normal; padding-inline: 0.45rem; }
.spec dd u { text-decoration: none; color: var(--signal); }

@media (max-width: 700px) {
  .spec > div { grid-template-columns: minmax(0, 1fr); gap: 0.4rem; }
}

/* ============================================================
   CONTACT — the one filled block
   ============================================================ */

.section--contact { border-bottom: 0; background: var(--signal); color: var(--ink); }
.section--contact .wrap { padding-block: clamp(3.25rem, 7vw, 5rem); }
.contact h2 {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(2.6rem, 9vw, 5rem); line-height: 0.9;
  text-transform: uppercase; letter-spacing: -0.005em;
  color: var(--ink);
}
.contact p {
  max-width: 54ch; margin: 1.1rem 0 0;
  color: #241A02; font-size: 1.05rem;
}
.contact__links { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 2rem; }
.contact__note {
  margin-top: 2rem; padding-top: 1rem;
  border-top: 1px solid rgba(12,17,16,0.2);
  font-family: var(--f-mono); font-size: 0.72rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: #3A2B05;
}

/* ============================================================
   FOOTER
   ============================================================ */

.foot { background: var(--ink-deep); }
.foot__inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem;
  padding-block: 1.6rem;
  font-family: var(--f-mono); font-size: 0.7rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--dust-dim);
}
.foot a { color: var(--dust); }

/* ============================================================
   LOAD SEQUENCE — one orchestrated moment, from a visible state
   ============================================================ */

@media (prefers-reduced-motion: no-preference) {
  .hero__bar { animation: arm .7s cubic-bezier(.2,.8,.3,1) both; }
  @keyframes arm { from { transform: scaleX(0); } to { transform: scaleX(1); } }

  .panel > div { animation: lift .5s ease-out both; }
  .panel > div:nth-child(1) { animation-delay: .38s; }
  .panel > div:nth-child(2) { animation-delay: .46s; }
  .panel > div:nth-child(3) { animation-delay: .54s; }
  .panel > div:nth-child(4) { animation-delay: .62s; }
  @keyframes lift { from { opacity: .35; transform: translateY(4px); } to { opacity: 1; transform: none; } }
}