/* ============================================================
   MINH TRẦN — MY JOURNEY TO THE NEGATIVES · shared stylesheet
   Hallmark · genre: editorial · macrostructure: Long Document
   theme: Newsprint · nav: N6 Masthead · footer: Ft6 Letter close
   Static theme (Newsprint 0×): no transforms / reveals. Only
   colour + opacity state transitions, respecting reduced-motion.
   ============================================================ */

@import url("tokens.css");

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { overflow-x: clip; -webkit-text-size-adjust: 100%; }
body { overflow-x: clip; margin: 0; }

img, video { max-width: 100%; display: block; }
a { color: inherit; }

/* ---------- Base typography ---------- */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.62;
  color: var(--color-ink);
  background-color: var(--color-paper);
  font-variant-numeric: oldstyle-nums;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  font-style: normal;
  line-height: 1.08;
  letter-spacing: -0.022em;
  color: var(--color-ink);
  margin: 0;
}

p { margin: 0 0 var(--space-lg); max-width: var(--measure); }
ul, ol { margin: 0 0 var(--space-lg); max-width: var(--measure); }

/* ---------- Links ---------- */
a.link {
  color: var(--color-accent-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  transition: color var(--dur-short) var(--ease-out),
              border-color var(--dur-short) var(--ease-out);
}
a.link:hover { color: var(--color-ink); border-bottom-color: var(--color-ink); }
a.link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- Layout shell ---------- */
.page { max-width: var(--page-max); margin-inline: auto; padding-inline: clamp(1.1rem, 4vw, 2.5rem); }
.prose { max-width: var(--measure); }
.prose--wide { max-width: var(--measure-wide); }

/* ============================================================
   N6 — Newspaper masthead
   ============================================================ */
.masthead {
  border-bottom: 1px solid var(--color-ink);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-paper);
}
.masthead__rule-top {
  border-top: 3px double var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-block: var(--space-3xs);
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-3);
}
.masthead__center {
  text-align: center;
  padding-block: var(--space-sm) var(--space-xs);
}
.masthead__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 4.4vw, 2.8rem);
  letter-spacing: -0.03em;
  line-height: 1;
}
.masthead__title em {
  font-style: normal;
  color: var(--color-accent-deep);
}
.masthead__sub {
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-top: var(--space-2xs);
}
.masthead__nav {
  border-top: 1px solid var(--color-ink);
  display: flex;
  gap: clamp(0.6rem, 2vw, 1.6rem);
  justify-content: center;
  flex-wrap: wrap;
  padding-block: var(--space-xs);
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.masthead__nav a {
  color: var(--color-ink-2);
  text-decoration: none;
  white-space: nowrap;
  padding-block: var(--space-3xs);
  border-bottom: 1px solid transparent;
  transition: color var(--dur-short) var(--ease-out),
              border-color var(--dur-short) var(--ease-out);
}
.masthead__nav a:hover { color: var(--color-accent-deep); border-bottom-color: var(--color-accent); }
.masthead__nav a[aria-current="page"] { color: var(--color-ink); border-bottom-color: var(--color-ink); }
.masthead__nav a:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }

/* ============================================================
   Home — H2 Split diptych hero
   ============================================================ */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  padding-block: clamp(2.5rem, 7vw, 5.5rem) clamp(2rem, 5vw, 4rem);
  border-bottom: 1px solid var(--color-rule);
}
.hero__headline {
  font-size: var(--text-3xl);
  font-weight: 600;
  letter-spacing: -0.03em;
  max-width: 18ch;
  margin-bottom: var(--space-lg);
}
.hero__sub {
  font-size: var(--text-md);
  line-height: 1.5;
  color: var(--color-ink-2);
  max-width: 46ch;
  margin-bottom: var(--space-xl);
}
.hero__media {
  position: relative;
  border: 1px solid var(--color-ink);
  background-color: var(--color-ink);
  overflow: hidden;
}
.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.04);
}
.hero__media figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  background-color: var(--color-ink-85);
  color: var(--color-paper);
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--space-2xs) var(--space-sm);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}
.btn {
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  flex: 0 0 auto;
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--color-ink);
  display: inline-block;
  vertical-align: middle;
  cursor: pointer;
  background-color: transparent;
  color: var(--color-ink);
  min-height: 44px;
  line-height: 1.4;
  transition: background-color var(--dur-short) var(--ease-out),
              color var(--dur-short) var(--ease-out),
              border-color var(--dur-short) var(--ease-out);
}
.btn--primary { background-color: var(--color-ink); color: var(--color-paper); }
.btn--primary:hover { background-color: var(--color-accent-deep); border-color: var(--color-accent-deep); }
.btn--ghost:hover { background-color: var(--color-paper-3); }
.btn:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.btn .arrow { font-family: var(--font-body); }

/* ============================================================
   Contents — film-strip chapter index (home)
   ============================================================ */
.contents {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--color-rule);
}
.contents__label {
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-rule);
}
.filmstrip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
}
.filmstrip__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: baseline;
  padding: var(--space-lg) var(--space-md);
  text-decoration: none;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-rule-soft);
  transition: background-color var(--dur-short) var(--ease-out);
}
.filmstrip__item:hover { background-color: var(--color-paper-2); }
.filmstrip__item:focus-visible { outline: 2px solid var(--color-focus); outline-offset: -2px; }
.filmstrip__num {
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  color: var(--color-accent-deep);
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}
.filmstrip__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.15;
}
.filmstrip__meta {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-3);
  font-style: italic;
  margin-top: var(--space-3xs);
}

/* ============================================================
   Long Document — chapter page
   ============================================================ */
.chapter {
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(3rem, 8vw, 6rem);
}
.chapter__head {
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: var(--space-lg);
  margin-bottom: var(--space-2xl);
}
.chapter__index {
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent-deep);
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--space-sm);
}
.chapter__title {
  font-size: var(--text-3xl);
  max-width: 20ch;
}
.chapter__kicker {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-md);
  color: var(--color-ink-2);
  margin-top: var(--space-md);
  max-width: 50ch;
}

/* Pull quote */
.pullquote {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: var(--text-2xl);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-lg);
  margin: var(--space-3xl) 0;
  max-width: 28ch;
}
.pullquote--wide { max-width: 40ch; }

/* Two aligned columns: prose + portrait */
.split2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr) min(42%, 26rem);
  align-items: start;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin: var(--space-3xl) 0;
}
.split2 .figure--inset {
  float: none;
  width: 100%;
  margin: 0;
}

/* Photographic figure */
.figure {
  margin: var(--space-3xl) 0;
}
.figure--full {
  width: 100%;
  margin-inline: 0;
  clear: both;
}
.figure img,
.figure video {
  width: 100%;
  height: auto;
  border: 1px solid var(--color-ink);
  filter: grayscale(1) contrast(1.04);
  background-color: var(--color-ink);
}
.figure figcaption {
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-top: var(--space-sm);
  line-height: 1.5;
}
.figure--inset {
  float: right;
  width: min(38%, 22rem);
  margin: var(--space-sm) 0 var(--space-lg) var(--space-xl);
}

/* Metadata plate (contact sheet technical block) */
.metaplate {
  border: 1px solid var(--color-ink);
  padding: var(--space-lg);
  margin: var(--space-2xl) 0;
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm) var(--space-lg);
}
.metaplate dt { color: var(--color-ink-3); text-transform: uppercase; font-size: var(--text-xs); letter-spacing: 0.12em; }
.metaplate dd { margin: 0; color: var(--color-ink); }

/* Countdown — drop timer */
.countdown {
  margin: var(--space-2xl) 0 var(--space-3xl);
  padding: var(--space-xl) var(--space-lg);
  border: 1px solid var(--color-ink);
  text-align: center;
}
.countdown__label {
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-2);
  margin: 0 0 var(--space-md);
}
.countdown__clock {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}
.countdown__unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 4.5rem;
}
.countdown__unit b {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}
.countdown__unit i {
  font-style: normal;
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-2);
  margin-top: var(--space-2xs);
}
.countdown__when {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  margin: var(--space-md) 0 0;
}

/* Three reasons list (blockchain) */
.reasons {
  list-style: none;
  padding: 0;
  margin: var(--space-2xl) 0;
  border-top: 1px solid var(--color-rule);
}
.reasons li {
  display: grid;
  grid-template-columns: 3rem minmax(11rem, 22ch) 1fr;
  align-items: baseline;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-rule);
  max-width: none;
}
.reasons__num {
  font-family: var(--font-outlier);
  font-size: var(--text-lg);
  color: var(--color-accent-deep);
  font-variant-numeric: tabular-nums;
}
.reasons__term {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  text-align: left;
}
.reasons__body { color: var(--color-ink-2); margin: 0; max-width: 56ch; }

/* ============================================================
   Listen — audio player (placeholder wired to /assets/audio/story.mp3)
   ============================================================ */
.listen {
  border: 1px solid var(--color-ink);
  background-color: var(--color-paper-2);
  padding: clamp(1.25rem, 3vw, 2rem);
  margin: var(--space-2xl) 0;
}
.listen__label {
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-bottom: var(--space-md);
}
.player {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.player__btn {
  width: 56px; height: 56px;
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid var(--color-ink);
  background-color: var(--color-ink);
  color: var(--color-paper);
  font-size: var(--text-lg);
  cursor: pointer;
  display: grid; place-items: center;
  transition: background-color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out);
}
.player__btn:hover { background-color: var(--color-accent-deep); border-color: var(--color-accent-deep); }
.player__btn:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.player__track {
  flex: 1 1 200px;
  min-width: 160px;
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  letter-spacing: 0.04em;
}
.player__bar {
  height: 4px;
  background-color: var(--color-rule);
  margin-top: var(--space-2xs);
  position: relative;
}
.player__bar::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: var(--player-progress, 0%);
  background-color: var(--color-accent);
}
.player__status {
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-3);
}
.transcript {
  margin-top: var(--space-xl);
  border-top: 1px solid var(--color-rule);
  padding-top: var(--space-lg);
}
.transcript__label {
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-bottom: var(--space-md);
}
.transcript p {
  font-style: italic;
  color: var(--color-ink-2);
  max-width: 60ch;
}

/* ============================================================
   Closing — CTA panel
   ============================================================ */
.closing {
  border: 1px solid var(--color-ink);
  padding: clamp(1.5rem, 4vw, 3rem);
  margin: var(--space-3xl) 0;
  text-align: left;
}
.closing__title {
  font-size: var(--text-2xl);
  max-width: 18ch;
  margin-bottom: var(--space-lg);
}
.closing__price {
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-deep);
  margin-bottom: var(--space-md);
}

/* ============================================================
   Chapter navigation (prev / next)
   ============================================================ */
.chapternav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-lg);
  border-top: 1px solid var(--color-ink);
  padding-top: var(--space-lg);
  margin-top: var(--space-3xl);
  flex-wrap: wrap;
  clear: both;
}
.chapternav a {
  text-decoration: none;
  color: var(--color-ink);
  max-width: 45%;
}
.chapternav a:hover .chapternav__title { color: var(--color-accent-deep); }
.chapternav__dir {
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-3);
}
.chapternav__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  transition: color var(--dur-short) var(--ease-out);
}
.chapternav--next { text-align: right; margin-left: auto; }

/* ============================================================
   Ft6 — Letter close footer
   ============================================================ */
.letterclose {
  padding-block: var(--space-2xl) var(--space-xl);
  font-family: var(--font-body);
}
.letterclose__body {
  font-style: italic;
  font-size: var(--text-md);
  color: var(--color-ink-2);
  max-width: 60ch;
  line-height: 1.5;
}
.letterclose__sign {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-xl);
  color: var(--color-ink);
  margin-top: var(--space-lg);
}
.letterclose__ps {
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-3);
  margin-top: var(--space-md);
  text-transform: uppercase;
}
.letterclose__meta {
  margin-top: var(--space-2xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-rule);
  display: flex;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-3);
}
.letterclose__meta a { color: var(--color-ink-2); text-decoration: none; border-bottom: 1px solid var(--color-rule); }
.letterclose__meta a:hover { color: var(--color-accent-deep); border-bottom-color: var(--color-accent); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 60rem) {
  .hero { grid-template-columns: 1fr; }
  .hero__media { order: -1; aspect-ratio: 16 / 10; }
  .figure--inset { float: none; width: 100%; margin: var(--space-2xl) 0; }
  .split2 { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .filmstrip { grid-template-columns: 1fr; }
}
@media (max-width: 40rem) {
  .metaplate { grid-template-columns: 1fr; }
  .reasons li { grid-template-columns: 1fr; gap: var(--space-xs); }
  .chapternav { flex-direction: column; }
  .chapternav a, .chapternav--next { max-width: 100%; text-align: left; margin-left: 0; }
  .hero__headline { font-size: var(--text-display-s); }
  .cta-row { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
}

/* Reduced motion — static theme has no transforms; keep colour
   transitions but collapse any to instant. */
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 1ms !important; }
}