/* =============================================================
   SD9S PORTFOLIO — refined editorial minimalism
   Palette: warm paper + ink, one vermillion accent
   Type: Fraunces (display serif) / Hanken Grotesk (body) / JetBrains Mono (labels)
   ============================================================= */

:root {
  /* color */
  --paper:      #f3efe6;
  --paper-2:    #ece6d9;
  --ink:        #191510;
  --ink-soft:   #3a352c;
  --muted:      #7a7264;
  --line:       #d8d0c0;
  --accent:     #d64522;
  --accent-ink: #b5361a;

  /* type */
  --serif: "Fraunces", Georgia, serif;
  --sans:  "Hanken Grotesk", system-ui, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, monospace;

  /* space */
  --gutter: clamp(1.25rem, 5vw, 6rem);
  --maxw: 1240px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.55vw + 0.9rem, 1.125rem);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: var(--paper);
  padding: 0.75rem 1.25rem; z-index: 10000; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

/* ---------- shared layout ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.75rem, 6vh, 4.5rem) var(--gutter);
  position: relative;
  z-index: 1;
}
.section__idx {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-ink);
  display: inline-block;
}
.section__head { margin-bottom: clamp(1.25rem, 3vw, 2rem); }
.section__title {
  font-family: var(--serif);
  font-weight: 380;
  font-size: clamp(1.9rem, 3.6vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  max-width: 20ch;
  margin-top: 1rem;
}
.section__title--wide { max-width: 24ch; }
.hl { color: var(--accent); font-style: italic; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--sans); font-weight: 500;
  font-size: 0.95rem; line-height: 1;
  padding: 0.9rem 1.4rem; border-radius: 100px;
  border: 1px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  cursor: pointer;
}

.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--accent); }

.btn--line { border-color: var(--line); color: var(--ink); }
.btn--line:hover { border-color: var(--ink); }

.btn--ghost { padding: 0.55rem 1rem; border: 1px solid var(--line); font-size: 0.85rem; }
.btn--ghost:hover { border-color: var(--ink); background: var(--ink); color: var(--paper); }

/* ---------- NAV ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  padding: 1rem var(--gutter);
  background: var(--paper);
  border-bottom: 1px solid transparent;
}
.nav.is-stuck { border-bottom-color: var(--line); }

.nav__monogram {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}
.nav__monogram::after { content: "."; color: var(--accent); }

.nav__links { display: flex; gap: clamp(1rem, 2.4vw, 2.2rem); }
.nav__links a {
  font-size: 0.9rem; font-weight: 500;
  color: var(--ink-soft);
}
.nav__idx { font-family: var(--mono); font-size: 0.68rem; color: var(--muted); margin-right: 0.15rem; }
.nav__links a:hover { color: var(--ink); }

.nav__right { display: flex; align-items: center; gap: 1rem; }

/* ---------- HERO ---------- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2rem, 5vh, 3.5rem) var(--gutter) clamp(1.5rem, 3vh, 2.5rem);
  position: relative; z-index: 1;
}
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--mono); font-size: 0.8rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft);
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}
.tick { width: 26px; height: 1px; background: var(--accent); display: inline-block; }

.hero__title {
  font-family: var(--serif);
  font-weight: 360;
  font-size: clamp(2.6rem, 7.5vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
}
.hero__title .line { display: block; }
.hero__title em { font-style: italic; color: var(--accent); font-weight: 340; }

.hero__meta {
  margin-top: clamp(1.25rem, 3vw, 2rem);
}
.hero__lede { font-size: clamp(1.05rem, 1.4vw, 1.25rem); color: var(--ink-soft); max-width: 46ch; }
.hero__lede strong { color: var(--ink); font-weight: 600; }
.ilink { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.ilink:hover { color: var(--accent-ink); }

.hero__cta { display: flex; flex-wrap: wrap; gap: 0.8rem; }

/* ---------- ABOUT ---------- */
.about__grid { display: block; max-width: 56ch; }
.about__body p { color: var(--ink-soft); margin-bottom: 0; max-width: 56ch; }
.about__body strong { color: var(--ink); font-weight: 600; }

.stats {
  list-style: none; display: flex; flex-wrap: wrap; gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--line);
}
.stats__num {
  display: block; font-family: var(--serif); font-weight: 400;
  font-size: clamp(2.2rem, 4vw, 3rem); line-height: 1; letter-spacing: -0.02em;
}
.stats__sup { font-size: 0.42em; vertical-align: super; color: var(--accent); margin-left: 0.1em; }
.stats__label { font-size: 0.82rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--mono); }

/* ---------- WORK / PROJECTS ---------- */
.projects { list-style: none; border-top: 1px solid var(--line); }
.project { border-bottom: 1px solid var(--line); }
.project__row {
  display: grid;
  grid-template-columns: 3rem 1fr 2fr auto 2rem;
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: baseline;
  padding: clamp(1.5rem, 3vw, 2.2rem) 0;
  position: relative;
  transition: padding-left 0.45s var(--ease), color 0.3s;
}
.project__row::before {
  content: ""; position: absolute; inset: 0;
  background: var(--ink); z-index: -1;
  transform: scaleY(0); transform-origin: bottom;
  transition: transform 0.45s var(--ease);
}
.project:hover .project__row { padding-left: 1.5rem; color: var(--paper); }
.project:hover .project__row::before { transform: scaleY(1); transform-origin: top; }
.project:hover .project__num,
.project:hover .project__desc,
.project:hover .project__tags span { color: color-mix(in srgb, var(--paper) 70%, transparent); }
.project:hover .project__arrow { color: var(--accent); transform: translateX(6px); }

.project__num { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); }
.project__name { font-family: var(--serif); font-size: clamp(1.5rem, 3vw, 2.3rem); font-weight: 400; letter-spacing: -0.02em; }
.project__desc { color: var(--ink-soft); font-size: 0.98rem; max-width: 44ch; }
.project__tags { display: flex; flex-direction: column; gap: 0.25rem; text-align: right; }
.project__tags span { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.project__arrow { justify-self: end; font-size: 1.3rem; transition: transform 0.4s var(--ease), color 0.3s; }

/* ---------- EXPERIENCE ---------- */
.xp { list-style: none; border-top: 1px solid var(--line); }
.xp__item {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(1.5rem, 5vw, 4rem);
  padding: clamp(1.8rem, 4vw, 2.8rem) 0;
  border-bottom: 1px solid var(--line);
}
.xp__role {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(1.35rem, 2.6vw, 2rem); line-height: 1.1; letter-spacing: -0.02em;
}
.xp__co {
  display: inline-block; margin-top: 0.55rem;
  font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent-ink);
}
.xp__meta {
  margin-top: 0.5rem;
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.05em;
  text-transform: uppercase; color: var(--muted);
}
.xp__summary { color: var(--ink); font-weight: 500; margin-bottom: 1.1rem; max-width: 56ch; }
.xp__points { list-style: none; display: grid; gap: 0.7rem; }
.xp__points li {
  position: relative; padding-left: 1.5rem;
  color: var(--ink-soft); font-size: 0.97rem; max-width: 60ch;
}
.xp__points li::before {
  content: "\2192"; position: absolute; left: 0; top: 0;
  color: var(--accent); font-weight: 500;
}

/* ---------- TIMELINE ---------- */
.timeline { list-style: none; max-width: 780px; }
.tl {
  display: grid; grid-template-columns: 8rem 1fr; gap: clamp(1rem, 3vw, 2.5rem);
  padding: clamp(1.4rem, 3vw, 2rem) 0;
  border-top: 1px solid var(--line);
}
.tl:last-child { border-bottom: 1px solid var(--line); }
.tl__year { font-family: var(--mono); font-size: 0.85rem; color: var(--accent-ink); letter-spacing: 0.04em; padding-top: 0.3rem; }
.tl__body h3 { font-family: var(--serif); font-weight: 460; font-size: clamp(1.2rem, 2vw, 1.55rem); letter-spacing: -0.01em; margin-bottom: 0.4rem; }
.tl__body p { color: var(--ink-soft); max-width: 52ch; }

/* ---------- CONTACT ---------- */
.contact {
  background: var(--ink);
  color: var(--paper);
  position: relative; z-index: 1;
  margin-top: clamp(2rem, 5vh, 3.5rem);
}
.contact__inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(3.5rem, 8vh, 6rem) var(--gutter) clamp(2.5rem, 5vh, 4rem);
  position: relative;
}
.section__idx--light { color: color-mix(in srgb, var(--accent) 80%, white); }
.contact__title {
  font-family: var(--serif); font-weight: 340;
  font-size: clamp(2.8rem, 9vw, 6.5rem); line-height: 0.98; letter-spacing: -0.03em;
  margin: 1rem 0 1.5rem;
}
.contact__lede { color: color-mix(in srgb, var(--paper) 72%, transparent); max-width: 44ch; margin-bottom: 2rem; }
.contact__mail {
  display: inline-flex; align-items: center; gap: 0.8rem;
  font-family: var(--serif); font-style: italic;
  font-size: clamp(1.6rem, 4vw, 2.8rem); font-weight: 360;
  color: var(--paper);
  border-bottom: 1px solid color-mix(in srgb, var(--paper) 35%, transparent);
  padding-bottom: 0.35rem;
}
.contact__mail:hover { color: var(--accent); border-color: var(--accent); }
.contact__mail[hidden] { display: none; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.email-gate {
  max-width: 26rem;
  padding: 1.4rem 1.5rem 1.5rem;
  border: 1px solid color-mix(in srgb, var(--paper) 18%, transparent);
  border-radius: 4px;
  background: color-mix(in srgb, var(--paper) 4%, transparent);
}
.email-gate__label {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--accent) 80%, white);
  margin-bottom: 0.55rem;
}
.email-gate__prompt {
  font-size: 1.05rem;
  color: color-mix(in srgb, var(--paper) 88%, transparent);
  margin-bottom: 1.15rem;
  line-height: 1.4;
}
.email-gate__form {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.65rem;
}
.email-gate__equation {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-family: var(--serif); font-size: 1.45rem; font-weight: 360;
  color: var(--paper); letter-spacing: 0.02em;
}
.email-gate__op { color: color-mix(in srgb, var(--paper) 55%, transparent); }
.email-gate__form input {
  width: 3.6rem;
  font-family: var(--serif); font-size: 1.35rem; font-weight: 360;
  text-align: center;
  padding: 0.55rem 0.4rem;
  border: none;
  border-bottom: 1.5px solid color-mix(in srgb, var(--paper) 40%, transparent);
  border-radius: 0;
  background: transparent; color: var(--paper);
  outline: none;
  transition: border-color 0.25s;
}
.email-gate__form input::placeholder {
  color: color-mix(in srgb, var(--paper) 35%, transparent);
  font-style: italic;
}
.email-gate__form input:focus { border-bottom-color: var(--accent); }
.email-gate__btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  margin-left: 0.35rem;
  font-family: var(--sans); font-weight: 500; font-size: 0.9rem;
  padding: 0.65rem 1.1rem;
  border: 1px solid color-mix(in srgb, var(--paper) 35%, transparent);
  border-radius: 100px;
  background: transparent; color: var(--paper);
  cursor: pointer;
}
.email-gate__btn:hover {
  background: var(--paper); color: var(--ink); border-color: var(--paper);
}
.email-gate__error {
  margin-top: 0.9rem;
  font-size: 0.88rem;
  color: color-mix(in srgb, var(--accent) 85%, white);
}
.email-gate.is-unlocked {
  padding: 0; border: none; background: transparent;
}
.email-gate.is-unlocked .email-gate__label,
.email-gate.is-unlocked .email-gate__prompt,
.email-gate.is-unlocked .email-gate__form,
.email-gate.is-unlocked .email-gate__error { display: none; }

.contact__socials {
  list-style: none; display: flex; flex-wrap: wrap; gap: clamp(1rem, 3vw, 2.5rem);
  margin-top: 3rem;
}
.contact__socials a {
  font-family: var(--mono); font-size: 0.85rem; letter-spacing: 0.05em; text-transform: uppercase;
  color: color-mix(in srgb, var(--paper) 78%, transparent);
}
.contact__socials a:hover { color: var(--paper); }

.site-footer {
  max-width: var(--maxw);
  margin: clamp(2rem, 5vh, 3.5rem) auto 0;
  padding: 1.8rem var(--gutter);
  border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center;
  font-size: 0.82rem; color: var(--muted);
  position: relative; z-index: 1;
}
.footer__mono { font-family: var(--mono); letter-spacing: 0.04em; }
.footer__top:hover { color: var(--accent); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .nav__links { display: none; }
  .project__row { grid-template-columns: 2rem 1fr; grid-template-areas: "num name" "desc desc" "tags arrow"; row-gap: 0.6rem; }
  .project__num { grid-area: num; }
  .project__name { grid-area: name; }
  .project__desc { grid-area: desc; }
  .project__tags { grid-area: tags; flex-direction: row; gap: 1rem; text-align: left; }
  .project__arrow { grid-area: arrow; }
  .xp__item { grid-template-columns: 1fr; gap: 1rem; }
  .tl { grid-template-columns: 5rem 1fr; }
}
@media (max-width: 560px) {
  .tl { grid-template-columns: 1fr; gap: 0.4rem; }
  .tl__year { padding-top: 0; }
}