/* =========================================================================
   Sebastián Murillo — Portfolio
   Editorial / brutalist-warm. Cream paper, ink, burnt-orange accent.
   Fraunces (display) + Bricolage Grotesque (body) + JetBrains Mono (meta).
   ========================================================================= */

/* ---------- TOKENS ---------- */

:root {
  --ink:        #1a1715;
  --ink-2:      #2c2723;
  --ink-muted:  #5c554f;
  --paper:      #f4efe6;
  --paper-2:    #ebe4d6;
  --paper-3:    #e0d7c3;
  --rule:       #d4c8b2;
  --accent:     #c2410c;          /* burnt orange */
  --accent-ink: #8a2d08;
  --grain:      0.045;            /* grain overlay opacity */

  --serif:      "Fraunces", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --sans:       "Bricolage Grotesque", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:       "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container:  min(1240px, 92vw);
  --gutter:     clamp(1.25rem, 3vw, 2.5rem);

  --ease:       cubic-bezier(.2,.7,.2,1);
  --ease-out:   cubic-bezier(.16,1,.3,1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:        #f1ece1;
    --ink-2:      #d8d2c5;
    --ink-muted:  #a9a194;
    --paper:      #16130f;
    --paper-2:    #1f1b16;
    --paper-3:    #2a241d;
    --rule:       #38312a;
    --accent:     #f97316;
    --accent-ink: #fb923c;
    --grain:      0.07;
  }
}

/* ---------- RESET & BASE ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.55vw + 0.86rem, 1.125rem);
  line-height: 1.55;
  font-feature-settings: "ss01", "ss02", "kern";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: clip;
}

/* warm grain overlay — cheap noise via SVG, no extra request */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: var(--grain);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.6 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
}
@media (prefers-color-scheme: dark) {
  body::before { mix-blend-mode: screen; }
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  text-decoration-color: color-mix(in oklab, var(--ink) 40%, transparent);
  transition: color .25s var(--ease), text-decoration-color .25s var(--ease);
}
a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

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

::selection {
  background: var(--accent);
  color: var(--paper);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.8rem;
  z-index: 1000;
}
.skip-link:focus { left: 0.5rem; }

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

/* ---------- LAYOUT ---------- */

.masthead, main, .colophon { width: var(--container); margin-inline: auto; }

main { padding-block-start: clamp(0.5rem, 2vw, 1.5rem); }

.section {
  padding-block: clamp(2.5rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--rule);
}

.section__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  margin-block-end: clamp(2rem, 5vw, 3.5rem);
}
.section__num {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  border: 1px solid var(--rule);
  padding: 0.3em 0.6em;
  border-radius: 999px;
  align-self: center;
}
.section__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 380;
  font-variation-settings: "opsz" 144, "SOFT" 30;
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  letter-spacing: -0.02em;
  line-height: 1;
}

/* ---------- MASTHEAD ---------- */

.masthead {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: clamp(0.75rem, 1.5vw, 1.25rem);
  gap: 1.5rem;
}
.masthead__brand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}
.masthead__mark {
  font-family: var(--serif);
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 0.35em 0.55em 0.25em;
  border-radius: 999px;
}
.masthead__edition {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.masthead__nav {
  display: flex;
  gap: clamp(0.9rem, 2.5vw, 2rem);
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.masthead__nav a { text-decoration: none; }
.masthead__nav a:hover { color: var(--accent); }

@media (max-width: 540px) {
  .masthead__edition { display: none; }
}

/* ---------- HERO ---------- */

.hero {
  position: relative;
  padding-block: clamp(0.75rem, 2vw, 1.5rem) clamp(4rem, 10vw, 8rem);
  display: grid;
  gap: clamp(0.75rem, 1.5vw, 1.25rem);
}

.hero__kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.hero__name {
  margin: 0;
  font-family: var(--serif);
  font-weight: 360;
  font-variation-settings: "opsz" 144, "SOFT" 50, "WONK" 0;
  font-size: clamp(3.5rem, 14vw, 11rem);
  line-height: 0.88;
  letter-spacing: -0.035em;
  color: var(--ink);
}
.hero__line { display: block; }
.hero__line--italic {
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 100, "WONK" 1;
  color: var(--accent);
  /* slight optical hang to feel typeset, not framework-default */
  margin-inline-start: clamp(0.5rem, 4vw, 3.5rem);
}
.hero__line em { font-style: italic; }

.hero__meta { max-width: 60ch; }
.hero__role {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(0.85rem, 1.1vw, 1rem);
  letter-spacing: 0.04em;
  color: var(--ink-2);
}
.hero__sep {
  color: var(--accent);
  margin: 0 0.6em;
  font-weight: 500;
}

.hero__statement {
  margin: 0;
  max-width: 38ch;
  font-family: var(--serif);
  font-weight: 360;
  font-variation-settings: "opsz" 24, "SOFT" 30;
  font-size: clamp(1.2rem, 1.6vw, 1.6rem);
  line-height: 1.32;
  color: var(--ink);
}

.hero__now {
  margin: clamp(1rem, 2vw, 1.5rem) 0 0;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0.9rem 0.55rem 0.7rem;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--ink-2);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hero__now-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 color-mix(in oklab, var(--accent) 60%, transparent);
  animation: pulse 2.4s ease-in-out infinite;
  flex-shrink: 0;
}
.hero__now-label {
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--accent);
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--accent) 50%, transparent); }
  50%      { box-shadow: 0 0 0 0.5rem color-mix(in oklab, var(--accent) 0%, transparent); }
}

/* ---------- ABOUT ---------- */

.about__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}
.about__lead {
  font-family: var(--serif);
  font-weight: 360;
  font-variation-settings: "opsz" 36, "SOFT" 30;
  font-size: clamp(1.4rem, 2vw, 2rem);
  line-height: 1.28;
  letter-spacing: -0.005em;
  margin: 0;
  grid-column: 1 / -1;
  max-width: 28ch;
  color: var(--ink);
}
.about__lead em {
  font-style: italic;
  color: var(--accent);
  font-variation-settings: "opsz" 36, "SOFT" 100, "WONK" 1;
}
.about__body {
  margin: 0;
  max-width: 60ch;
  font-size: 1.0625rem;
  color: var(--ink-2);
}

@media (max-width: 720px) {
  .about__grid { grid-template-columns: 1fr; }
}

/* ---------- WORK / FEATURE ---------- */

.feature {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-block-end: clamp(3rem, 7vw, 5rem);
  align-items: stretch;
}
.feature__media {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  border: 1px solid var(--rule);
  background:
    repeating-linear-gradient(
      135deg,
      var(--paper-2) 0 14px,
      var(--paper-3) 14px 28px
    );
  aspect-ratio: 4 / 3;
  isolation: isolate;
  transition: transform .6s var(--ease-out);
  align-self: start;          /* don't stretch vertically with the body — prevents image-size bug */
  min-width: 0;               /* allow the column to respect its 1.15fr track */
}
.feature:hover .feature__media { transform: translateY(-4px); }

.feature__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}
.feature__placeholder span {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  background: var(--paper);
  padding: 0.4em 0.8em;
  border-radius: 999px;
  border: 1px solid var(--rule);
}

.feature__body {
  display: flex;
  flex-direction: column;
  gap: clamp(0.9rem, 1.5vw, 1.25rem);
  align-self: center;
  min-width: 0;               /* let <code> wrap inside the 1fr track instead of forcing expansion */
}
.feature__tag {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}
.feature__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 380;
  font-variation-settings: "opsz" 144, "SOFT" 60;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 0.95;
  letter-spacing: -0.025em;
}
.feature__title-accent { color: var(--accent); }

.feature__lede {
  margin: 0;
  max-width: 46ch;
  font-family: var(--serif);
  font-weight: 360;
  font-variation-settings: "opsz" 24;
  font-size: clamp(1.05rem, 1.2vw, 1.25rem);
  line-height: 1.4;
  color: var(--ink-2);
}

.feature__spec {
  margin: 0.4rem 0 0;
  display: grid;
  gap: 0.5rem;
  border-block: 1px solid var(--rule);
  padding-block: 1rem;
}
.feature__spec > div {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  align-items: baseline;
}
.feature__spec dt {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.feature__spec dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-2);
}

.feature__links {
  margin-top: 0.4rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.2rem;
}
.feature__note {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

@media (max-width: 820px) {
  .feature { grid-template-columns: 1fr; }
}

/* ---------- BUTTONS ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  padding: 0.85em 1.2em;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: background .25s var(--ease), color .25s var(--ease), transform .25s var(--ease);
}
.btn:hover {
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
}
.btn--primary:hover {
  background: var(--accent-ink);
  border-color: var(--accent-ink);
  color: var(--paper);
}

/* ---------- WORK INDEX ---------- */

.index {
  list-style: none;
  margin: clamp(1.5rem, 3vw, 2.5rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}
.index__row { border-bottom: 1px solid var(--rule); }
.index__row:last-child { border-bottom: none; }
.index__link {
  display: grid;
  grid-template-columns: 2.25rem 1.4fr 1fr 2.5fr auto;
  gap: clamp(0.75rem, 1.6vw, 1.25rem);
  align-items: baseline;
  padding-block: clamp(1.1rem, 2vw, 1.6rem);
  text-decoration: none;
  position: relative;
  isolation: isolate;
  transition: padding-inline .35s var(--ease), color .25s var(--ease);
}
.index__link::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--paper-2);
  z-index: -1;
  clip-path: inset(0 100% 0 0);
  transition: clip-path .55s var(--ease-out);
}
.index__link:hover {
  padding-inline: clamp(0.9rem, 2vw, 1.4rem);
  color: var(--ink);
  text-decoration: none;
}
.index__link:hover::before { clip-path: inset(0 0 0 0); }

.index__num {
  font-size: 0.78rem;
  color: var(--ink-muted);
}
.index__title {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 60, "SOFT" 30;
  font-size: clamp(1.4rem, 2vw, 1.85rem);
  letter-spacing: -0.01em;
  color: var(--ink);
}
.index__meta {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
}
.index__note {
  font-size: 0.95rem;
  color: var(--ink-2);
  max-width: 56ch;
}
.index__note em { color: var(--ink-muted); font-style: italic; }
.index__cta {
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.index__link:hover .index__cta {
  opacity: 1;
  transform: translateX(0);
}

@media (max-width: 920px) {
  .index__link {
    grid-template-columns: 1.5rem 1fr;
    grid-template-areas:
      "num title"
      ".   meta"
      ".   note"
      ".   cta";
    row-gap: 0.4rem;
  }
  .index__num   { grid-area: num; }
  .index__title { grid-area: title; }
  .index__meta  { grid-area: meta; }
  .index__note  { grid-area: note; }
  .index__cta   { grid-area: cta; opacity: 1; transform: none; }
}

/* ---------- SKILLS ---------- */

.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
}
.skills__group { max-width: 38ch; }
.skills__heading {
  margin: 0 0 0.6rem;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  border-top: 1px solid var(--rule);
  padding-top: 0.9rem;
}
.skills__body {
  margin: 0;
  font-family: var(--serif);
  font-weight: 360;
  font-variation-settings: "opsz" 24, "SOFT" 30;
  font-size: clamp(1.1rem, 1.4vw, 1.35rem);
  line-height: 1.4;
  color: var(--ink);
}
@media (max-width: 820px) {
  .skills__grid { grid-template-columns: 1fr; }
}

/* ---------- CONTACT ---------- */

.contact__statement {
  margin: 0 0 clamp(1.5rem, 4vw, 2.5rem);
  font-family: var(--serif);
  font-weight: 360;
  font-variation-settings: "opsz" 144, "SOFT" 60;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 18ch;
}
.contact__statement em {
  font-style: italic;
  color: var(--accent);
  font-variation-settings: "opsz" 144, "SOFT" 100, "WONK" 1;
}
.contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
  border-top: 1px solid var(--rule);
}
.contact__list li {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 1rem;
  align-items: baseline;
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--rule);
}
.contact__label {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.contact__link {
  font-family: var(--serif);
  font-weight: 380;
  font-variation-settings: "opsz" 36, "SOFT" 30;
  font-size: clamp(1.1rem, 1.6vw, 1.4rem);
  letter-spacing: -0.005em;
  word-break: break-word;
}
@media (max-width: 540px) {
  .contact__list li {
    grid-template-columns: 1fr;
    gap: 0.1rem;
  }
}

/* ---------- COLOPHON / FOOTER ---------- */

.colophon {
  border-top: 1px solid var(--rule);
  padding-block: 1.5rem 2.5rem;
  margin-block-start: clamp(2rem, 5vw, 4rem);
}
.colophon__row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  align-items: center;
  justify-content: space-between;
}
.colophon__set { flex: 1; min-width: 14rem; }
.colophon__src { text-decoration: none; }
.colophon__src:hover { color: var(--accent); }

/* ---------- REVEAL ---------------------------------------------------------
   Two strategies, both fail-safe (content stays visible if JS or animations
   never fire — important for crawlers, no-JS users, and static snapshotters):

   1. Hero: subtle slide-up via CSS animation. Opacity stays at 1 throughout,
      so the content is always rendered. Pure CSS, no JS dependency.
   2. Below-the-fold: IntersectionObserver-driven fade. Hides ONLY when JS is
      available to un-hide (`.js [data-reveal]:not(.is-revealed)`). */

@keyframes hero-rise {
  from { transform: translateY(22px); }
  to   { transform: none; }
}

.hero [data-reveal] {
  animation: hero-rise .9s var(--ease-out) both;
}
.hero [data-reveal]:nth-child(1) { animation-delay: 60ms;  }
.hero [data-reveal]:nth-child(2) { animation-delay: 140ms; }
.hero [data-reveal]:nth-child(3) { animation-delay: 320ms; }
.hero [data-reveal]:nth-child(4) { animation-delay: 420ms; }
.hero [data-reveal]:nth-child(5) { animation-delay: 540ms; }

/* Section-level reveals only hide when JS will un-hide them. */
.js .section [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  will-change: opacity, transform;
}
.js .section [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .hero [data-reveal] { animation: none; }
  .js .section [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* =========================================================================
   CAROUSEL — featured project media
   ========================================================================= */
.carousel { position: relative; width: 100%; touch-action: pan-y pinch-zoom; }
.carousel__track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  list-style: none;
  margin: 0;
  padding: 0;
}
.carousel__slide {
  grid-column: 1;
  grid-row: 1;
  opacity: 0;
  transition: opacity 360ms ease;
  pointer-events: none;
}
.carousel__slide.is-active { opacity: 1; pointer-events: auto; }
.carousel__slide img { width: 100%; height: auto; display: block; }
.carousel__btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 2.75rem; height: 2.75rem;
  display: grid; place-items: center;
  background: var(--paper); color: var(--ink);
  border: 1px solid var(--rule); border-radius: 999px;
  font: 500 1.1rem/1 "JetBrains Mono", ui-monospace, monospace;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}
.carousel__btn:hover { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.carousel__btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.carousel__btn--prev { left: 0.75rem; }
.carousel__btn--next { right: 0.75rem; }
.carousel__count {
  position: absolute; bottom: 0.75rem; right: 0.75rem;
  margin: 0; padding: 0.25rem 0.5rem;
  background: var(--paper); color: var(--ink);
  border: 1px solid var(--rule);
  font-size: 0.75rem; line-height: 1;
}
@media (prefers-reduced-motion: reduce) {
  .carousel__slide { transition: none; }
  .carousel__btn { transition: none; }
}