/* ============================================================
   Field Notes on Being Alive — main.css
   Tokens, reset, typography, layout, components.
   ============================================================ */

:root {
  /* Palette (spec §2) */
  --color-ink:        #1C1812;
  --color-dust:       #8C6E52;
  --color-rust:       #A84B1F;
  --color-rust-deep:  #8B3E19;
  --color-sage:       #5A6F58;
  --color-parchment:  #F6EDE0;
  --color-parchment-2:#EFE4D2;
  --color-card:       #EEE3D3;
  --color-rule:       #D9C9B5;
  --color-write-line: #E2D5C3;

  /* Type */
  --font-display: 'Playfair Display', 'Times New Roman', Times, serif;
  --font-body:    'DM Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-italic:  'Cormorant Garamond', 'Playfair Display', Georgia, serif;

  /* Layout */
  --col-narrow:   600px;
  --col-reading:  660px;
  --col:          960px;
  --col-wide:     1180px;
  --gutter:       clamp(20px, 4vw, 40px);

  /* Motion */
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur:      240ms;
}

/* -------- Reset -------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--color-parchment);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1, "liga" 1;
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--color-rust); color: var(--color-parchment); }

/* -------- Layout helpers -------- */
.container {
  width: 100%;
  max-width: var(--col-wide);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.container-reading { max-width: var(--col-reading); }
.container-narrow  { max-width: var(--col-narrow); }
.container-mid     { max-width: var(--col); }

.section {
  padding: clamp(96px, 12vh, 144px) 0;
}

/* -------- Type primitives -------- */
.eyebrow {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-rust);
  margin: 0 0 24px;
}
.eyebrow-tiny {
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  color: var(--color-rust);
  margin: 0;
}

.display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin: 0;
  text-wrap: balance;
}
.headline {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(28px, 4.4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0;
  text-wrap: balance;
}
.italic-line {
  font-family: var(--font-italic);
  font-style: italic;
  font-weight: 400;
  color: var(--color-dust);
}

.rule-rust {
  display: block;
  width: 40px;
  height: 1.5px;
  background: var(--color-rust);
  border: 0;
  margin: 24px 0;
}
.rule-rust-full {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-rust);
  border: 0;
  margin: 0;
}

/* -------- Ruled paper texture (low-opacity bg) -------- */
.ruled {
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 35px,
      var(--color-write-line) 35px,
      var(--color-write-line) 36px
    );
}

/* -------- Buttons -------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 14px 22px;
  border: 1px solid var(--color-ink);
  background: transparent;
  color: var(--color-ink);
  border-radius: 0;
  cursor: pointer;
  transition: background var(--dur) var(--ease-out),
              color var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
  text-decoration: none;
}
.btn:hover { background: var(--color-ink); color: var(--color-parchment); }
.btn-rust {
  background: var(--color-rust);
  border-color: var(--color-rust);
  color: var(--color-parchment);
}
.btn-rust:hover { background: var(--color-rust-deep); border-color: var(--color-rust-deep); color: var(--color-parchment); }

/* Inline rust link (parchment world) */
.link-rust {
  color: var(--color-rust);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.04em;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}
.link-rust:hover { border-bottom-color: var(--color-rust); }

/* -------- Episode type tag (field stamp) -------- */
.tag-episode {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-rust);
  border: 1px solid var(--color-rust);
  padding: 4px 9px 3px;
  border-radius: 0;
  line-height: 1;
  white-space: nowrap;
}
.tag-locked {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-dust);
  border: 1px solid var(--color-rule);
  padding: 4px 9px 3px;
  line-height: 1;
  white-space: nowrap;
}

/* -------- Premise (Section 3) -------- */
.premise p {
  margin: 0 0 24px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--color-ink);
}
.premise p:last-child { margin-bottom: 0; }
.premise .first-italic::first-line { /* fallback if first-letter style swapped */ }
.premise .lede {
  font-family: var(--font-italic);
  font-style: italic;
  font-size: 22px;
  line-height: 1.45;
  color: var(--color-ink);
  margin: 0 0 20px;
  text-wrap: balance;
}

/* -------- Chapter feature (Section 4) -------- */
.chapter-feature__header {
  border-top: 1.5px solid var(--color-rust);
  padding-top: 28px;
  margin-bottom: 48px;
}
.chapter-feature__meta {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 14px;
}
.chapter-num {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-rust);
}
.chapter-month {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-dust);
}
.chapter-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin: 0 0 18px;
}
.chapter-intro {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-ink);
  max-width: 640px;
  margin: 24px 0 0;
}

/* -------- Episode card grid -------- */
.episode-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--color-rule);
  border: 1px solid var(--color-rule);
  margin-top: 56px;
}
@media (min-width: 720px) {
  .episode-grid { grid-template-columns: 1fr 1fr; }
}
.episode-card {
  background: var(--color-card);
  padding: 28px 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 220px;
  transition: background var(--dur) var(--ease-out);
}
.episode-card__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}
.episode-card__num {
  font-family: var(--font-body);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-dust);
  white-space: nowrap;
}
.episode-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--color-ink);
  margin: 4px 0 0;
}
.episode-card__hook {
  font-family: var(--font-italic);
  font-style: italic;
  font-size: 16px;
  line-height: 1.4;
  color: var(--color-dust);
  margin: 0;
  flex: 1;
}
.episode-card__listen {
  margin-top: auto;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-rust);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid transparent;
  align-self: flex-start;
  padding-bottom: 2px;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}
.episode-card__listen:hover { border-bottom-color: var(--color-rust); }
.episode-card__listen[aria-disabled="true"] { color: var(--color-dust); pointer-events: none; }

/* -------- Journal preview (Section 5) — table of contents -------- */
.toc-list {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  border-top: 1px solid var(--color-rule);
}
.toc-row {
  display: grid;
  grid-template-columns: 90px 1fr auto 24px;
  align-items: baseline;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--color-rule);
  transition: padding var(--dur) var(--ease-out);
}
.toc-row a {
  display: contents;
}
.toc-row:hover { padding-left: 8px; padding-right: 8px; }
.toc-row .chapter-num { margin: 0; }
.toc-row__month {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-dust);
}
.toc-row__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}
.toc-row__arrow {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--color-rust);
}
@media (max-width: 600px) {
  .toc-row {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "num arrow"
      "month arrow"
      "title arrow";
    gap: 4px 16px;
    align-items: center;
  }
  .toc-row .chapter-num { grid-area: num; }
  .toc-row__month { grid-area: month; }
  .toc-row__title { grid-area: title; margin-top: 6px; }
  .toc-row__arrow { grid-area: arrow; }
}

.journal-footer {
  margin-top: 56px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.journal-footer__italic {
  font-family: var(--font-italic);
  font-style: italic;
  font-size: 15px;
  color: var(--color-dust);
}
.journal-footer__link {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--color-rust);
  align-self: flex-start;
}
.journal-footer__link:hover { border-bottom: 1px solid var(--color-rust); }

/* -------- Archive page chapter list -------- */
.archive-list {
  list-style: none;
  margin: 64px 0 0;
  padding: 0;
  border-top: 1.5px solid var(--color-rust);
}
.archive-row {
  border-bottom: 1px solid var(--color-rule);
}
.archive-row:last-child { border-bottom: 1.5px solid var(--color-rust); }
.archive-row__head {
  display: grid;
  grid-template-columns: 100px 1fr 140px;
  gap: 32px;
  align-items: center;
  padding: 26px 0;
  cursor: default;
  background: transparent;
  border: 0;
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  transition: background var(--dur) var(--ease-out), padding var(--dur) var(--ease-out);
}
.archive-row--active .archive-row__head { cursor: pointer; }
.archive-row--active .archive-row__head:hover { padding-left: 12px; padding-right: 12px; background: rgba(168, 75, 31, 0.04); }
.archive-row__meta {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-rust);
  line-height: 1.5;
}
.archive-row__meta-month {
  display: block;
  color: var(--color-dust);
  font-weight: 500;
  letter-spacing: 0.18em;
  margin-top: 2px;
}
.archive-row__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0;
}
.archive-row__cta {
  text-align: right;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
}
.archive-row__cta-text {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-rust);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.archive-row__cta-text::after {
  content: "→";
  display: inline-block;
  transition: transform var(--dur) var(--ease-out);
}
.archive-row--active[aria-expanded="true"] .archive-row__cta-text::after {
  transform: rotate(90deg);
}
.archive-row--locked { opacity: 0.5; }
.archive-row--locked .archive-row__title { color: var(--color-ink); }
.archive-row__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 360ms var(--ease-out);
}
.archive-row__panel-inner {
  padding: 8px 0 40px;
}
.archive-row--active[aria-expanded="true"] .archive-row__panel {
  max-height: 2000px;
}
@media (max-width: 600px) {
  .archive-row__head {
    grid-template-columns: 1fr;
    gap: 8px;
    align-items: flex-start;
  }
  .archive-row__cta { justify-content: flex-start; }
}

/* -------- About page (letter) -------- */
.about-headline {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(28px, 4.5vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 40px;
  color: var(--color-ink);
  text-wrap: balance;
}
.letter p {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  color: var(--color-ink);
  margin: 0 0 22px;
}
.letter p:first-of-type::first-line {
  font-family: var(--font-italic);
  font-style: italic;
}
.letter-photo {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1 / 1;
  background: var(--color-parchment-2);
  border: 1px solid var(--color-dust);
  margin: 56px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-italic);
  font-style: italic;
  color: var(--color-dust);
  font-size: 14px;
  letter-spacing: 0.06em;
  position: relative;
}
.letter-photo::after {
  content: "PORTRAIT — TK";
  position: absolute;
  bottom: -22px;
  left: 0;
  font-family: var(--font-body);
  font-style: normal;
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--color-dust);
}
.letter-sign {
  margin-top: 56px;
}
.letter-sign__email {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--color-dust);
  margin-top: 20px;
}
.letter-sign__email a { color: var(--color-rust); }
.letter-sign__email a:hover { border-bottom: 1px solid var(--color-rust); }

/* -------- Focus visibility -------- */
:focus-visible {
  outline: 2px solid var(--color-rust);
  outline-offset: 3px;
}

/* -------- Reduce motion -------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}