/* Starkojak — a manga chapter on one page. See DESIGN.md. */

:root {
  --sumi: #15130f;
  --paper: #e7ddd0;
  --white-out: #f5f0e7;
  --tone-30: #b9b0a3;
  --tone-60: #6e675e;
  --vermilion: #e2501b;

  --bw: 4px;          /* panel border */
  --gap-row: 28px;
  --gap-col: 14px;
  --cut: 36px;        /* depth of the diagonal gutter */
  --margin-outer: 88px;

  --font-title: "Dela Gothic One", "Arial Black", Impact, sans-serif;
  --font-letter: "Comic Neue", "Comic Sans MS", "Chalkboard SE", sans-serif;

  /* fine screentone: 5px dot grid */
  --dots: radial-gradient(circle, var(--sumi) 0.95px, transparent 1.35px);
}

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

html { scroll-padding-top: 64px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--sumi);
  font-family: var(--font-letter);
  font-size: 17px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; }

:focus-visible { outline: 3px solid var(--sumi); outline-offset: 3px; }

/* ---------- top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 48px;
  padding: 0 max(16px, calc((100vw - 1040px) / 2 + 24px));
  background: var(--paper);
  border-bottom: 2px solid var(--sumi);
}

.topbar__brand {
  font-family: var(--font-title);
  font-size: 18px;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.topbar__nav { display: flex; align-items: center; gap: 14px; }

.topbar__link {
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  line-height: 1;
}

.topbar__link--boxed {
  padding: 7px 11px 6px;
  border: 2px solid var(--sumi);
  background: var(--white-out);
}

.topbar__link--boxed:hover { background: var(--sumi); color: var(--paper); }

/* ---------- sheet: one manga page ---------- */

.sheet {
  position: relative;
  max-width: 1040px;
  margin: 0 auto;
  padding: 44px 24px 64px var(--margin-outer);
}

/* thumb-index tab in the outer margin */
.sheet__tab {
  position: absolute;
  top: 44px;
  left: 24px;
  margin: 0;
  padding: 16px 9px;
  writing-mode: vertical-rl;
  background: var(--sumi);
  color: var(--paper);
  font-family: var(--font-title);
  font-size: 15px;
  letter-spacing: 0.08em;
  line-height: 1;
}

.sheet__nombre {
  position: absolute;
  right: 24px;
  bottom: 22px;
  margin: 0;
  font-family: var(--font-title);
  font-size: 13px;
  color: var(--tone-60);
}

/* ---------- title splash ---------- */

.splash {
  container-type: inline-size;
  margin-bottom: 22px;
}

.splash__title {
  position: relative;
  isolation: isolate;
  margin: 0;
  font-family: var(--font-title);
  font-weight: 400;
  font-size: min(12cqi, 150px);
  line-height: 0.9;
  letter-spacing: -0.01em;
}

/* screentone drop shadow behind the title */
.splash__title::before {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  z-index: -1;
  transform: translate(0.07em, 0.06em);
  background: var(--dots) 0 0 / 4px 4px;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.splash__tagline {
  margin: 14px 0 0;
  font-size: 21px;
  font-weight: 700;
}

/* ---------- panels ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap-col);
  row-gap: var(--gap-row);
}

.panel {
  position: relative;
  margin: 0;
  background: var(--sumi);
  border: var(--bw) solid var(--sumi);
  overflow: hidden;
}

.panel img { width: 100%; }

/* Diagonal cuts. The border is the ink background showing through
   padding, so the clipped edge keeps its stroke. */
.cut-below,
.cut-above { border: 0; padding: var(--bw); }

.cut-below,
.cut-below > *,
.cut-below::before,
.cut-below::after {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), 0 100%);
}

.cut-above,
.cut-above > img {
  clip-path: polygon(0 var(--cut), 100% 0, 100% 100%, 0 100%);
}

/* the quiet screentone panel that holds the balloon */
.panel--tone { height: 100%; }

.panel--tone::before,
.panel--tone::after {
  content: "";
  position: absolute;
  inset: var(--bw);
}

.panel--tone::before { background: var(--white-out); }

/* waking up: dense tone at the top thinning to white */
.panel--tone::after {
  background:
    radial-gradient(circle, var(--sumi) 1.6px, transparent 2px) 0 0 / 6px 6px,
    radial-gradient(circle, var(--sumi) 1.6px, transparent 2px) 3px 3px / 6px 6px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0,0,0,.55) 40%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0,0,0,.55) 40%, transparent 88%);
}

/* ---------- captions & balloons ---------- */

.caption {
  position: absolute;
  z-index: 1;
  max-width: 72%;
  margin: 0;
  padding: 9px 15px 8px;
  background: var(--white-out);
  border: 2px solid var(--sumi);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}

.caption--tl { top: 0; left: 0; border-width: 0 2px 2px 0; }

.balloon {
  position: absolute;
  z-index: 2;
  margin: 0;
  padding: 1.25em 1.5em;
  background: var(--white-out);
  border: 2.5px solid var(--sumi);
  border-radius: 50%;
  text-align: center;
  font-weight: 700;
  font-size: 21px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-wrap: balance;
}

.balloon__tail {
  position: absolute;
  width: 60px;
  height: 40px;
  overflow: visible;
}

/* ---------- page 1 ---------- */

.grid--p1 { grid-template-rows: auto 1fr auto; }

.panel--wide { grid-column: 1 / -1; }

.panel--face { grid-column: 1 / 9; grid-row: 2 / 4; }

.cell--balloon {
  position: relative;
  grid-column: 9 / -1;
  grid-row: 2;
}

.panel--star {
  grid-column: 9 / -1;
  grid-row: 3;
  align-self: end;
  margin-top: calc(-1 * var(--cut) - 6px);
}

/* the balloon breaks out of its panel towards the face */
.balloon--face {
  top: 34%;
  left: -34px;
  right: 8%;
  padding: 1.6em 1.3em;
}

.balloon--face .balloon__tail {
  left: -50px;
  top: 52%;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px 11px;
  border: 2.5px solid var(--sumi);
  font-family: var(--font-letter);
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
  color: var(--sumi);
  text-decoration: none;
  cursor: pointer;
}

/* the only vermilion button on the site */
.btn--avnu {
  background: var(--vermilion);
  box-shadow: 4px 4px 0 var(--sumi);
  transition: transform 80ms, box-shadow 80ms;
}

.btn--avnu:hover,
.btn--avnu:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--sumi); }

.btn--copy {
  min-width: 6.2em;
  padding: 9px 14px 8px;
  font-size: 16px;
  background: var(--sumi);
  color: var(--paper);
}

.btn--copy:hover { background: #2c2823; }

.btn--x {
  border-color: var(--paper);
  color: var(--paper);
  background: transparent;
}

.btn--x:hover { background: var(--paper); color: var(--sumi); }

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

/* ---------- page 2: calm, wide ---------- */

.grid--p2 { row-gap: 48px; column-gap: 20px; }

.panel--p2a,
.panel--p2d { grid-column: 1 / -1; }

.panel--p2b { grid-column: 1 / 8; align-self: end; }

.panel--p2c { grid-column: 8 / -1; }

.caption--br { right: 0; bottom: 0; border-width: 2px 0 0 2px; }

.balloon--p2d {
  top: 7%;
  left: 0;
  right: 0;
  width: fit-content;
  max-width: 36%;
  margin: 0 auto;
}

.balloon--p2d .balloon__tail {
  left: calc(50% - 43px);
  top: calc(100% - 4px);
  transform: rotate(-53.5deg);
}

/* ---------- page 3: three steps ---------- */

.grid--p3 {
  grid-template-columns: 1fr 1.5fr 1fr;
  column-gap: 14px;
  row-gap: 22px;
}

.panel--step {
  display: flex;
  flex-direction: column;
  grid-row: 1;
}

/* equal image heights across the tier, so the caption bands line up */
.panel--step img { aspect-ratio: 1; object-fit: cover; }
.panel--p3b img { aspect-ratio: 1.516; }

.panel--p3a { grid-column: 1; }
.panel--p3b { grid-column: 2; }
.panel--p3c { grid-column: 3; }

.band {
  flex: 1;
  margin: 0;
  padding: 11px 13px 10px;
  background: var(--white-out);
  border-top: 2px solid var(--sumi);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}

.btn--avnu { grid-column: 2; grid-row: 2; justify-self: center; }

.ca {
  position: relative;
  grid-column: 1 / -1;
  grid-row: 3;
  margin-top: 14px;
  padding: 20px 24px 18px;
  background: var(--white-out);
  border: var(--bw) solid var(--sumi);
}

.ca__label {
  margin: 0 0 12px;
  font-family: var(--font-title);
  font-weight: 400;
  font-size: 15px;
  letter-spacing: 0.06em;
}

.ca__row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ca__value {
  flex: 1;
  min-width: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 15px;
  overflow-wrap: anywhere;
}

.ca__short { display: none; }

.ca__note {
  margin: 14px 0 0;
  font-size: 15px;
  color: var(--tone-60);
}

/* ---------- page 4: chapter close ---------- */

.panel--p4a { grid-column: 1 / -1; }

.panel--p4b { grid-column: 1 / 7; grid-row: 2; }

.panel--end {
  grid-column: 7 / -1;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  gap: 24px;
  padding: 40px 32px 36px;
  color: var(--paper);
}

/* night falling: paper-coloured tone thinning downwards */
.panel--end::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, var(--paper) 1px, transparent 1.4px) 0 0 / 6px 6px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.22), transparent 50%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,.22), transparent 50%);
}

.end__line {
  position: relative;
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(32px, 4.4vw, 50px);
  line-height: 1.02;
}

.panel--end .btn { position: relative; }

.fin {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

@media (min-width: 761px) {
  .cut-right { border: 0; padding: var(--bw); }

  .cut-right,
  .cut-right > img {
    clip-path: polygon(0 0, 100% 0, calc(100% - var(--cut)) 100%, 0 100%);
  }

  .cut-left {
    clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%);
    margin-left: calc(-1 * var(--cut) + 6px);
    padding-left: calc(var(--cut) + 30px);
  }
}

/* ---------- footer ---------- */

.colophon {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px 56px var(--margin-outer);
}

.colophon p {
  max-width: 62ch;
  margin: 0;
  padding-top: 18px;
  border-top: 2px solid var(--sumi);
  font-size: 15px;
  color: var(--tone-60);
}

/* ---------- motion: panels snap in once ---------- */

.js .snap { opacity: 0; }
.js .balloon { opacity: 0; }

.js .snap.is-in {
  animation: snap 230ms cubic-bezier(0.25, 1.5, 0.5, 1) var(--delay, 0ms) both;
}

.js .panel--face.is-in {
  animation: slam 460ms cubic-bezier(0.2, 0.9, 0.3, 1) var(--delay, 0ms) both;
}

.js .is-in .balloon {
  animation: pop 260ms cubic-bezier(0.3, 1.8, 0.5, 1) calc(var(--delay, 0ms) + 420ms) both;
}

/* page 2 settles instead of snapping */
.js .sheet--calm .snap.is-in {
  animation: settle 380ms ease-out var(--delay, 0ms) both;
}

@keyframes settle {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

@keyframes snap {
  from { opacity: 0; transform: translateY(-8px) scale(1.035); }
  55%  { opacity: 1; }
  to   { opacity: 1; transform: none; }
}

@keyframes slam {
  0%   { opacity: 0; transform: scale(1.16); }
  45%  { opacity: 1; transform: scale(0.985); }
  62%  { transform: translate(-4px, 3px); }
  78%  { transform: translate(3px, -2px); }
  100% { opacity: 1; transform: none; }
}

@keyframes pop {
  from { opacity: 0; transform: scale(0.6); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .js .snap,
  .js .balloon { opacity: 1; animation: none !important; }
}

/* ---------- phones ---------- */

@media (max-width: 760px) {
  :root {
    --bw: 3px;
    --gap-row: 16px;
    --cut: 24px;
  }

  body { font-size: 16px; }

  .sheet { padding: 24px 16px 52px; }

  .sheet__tab {
    position: static;
    display: inline-block;
    margin-bottom: 14px;
    padding: 7px 10px 6px;
    writing-mode: horizontal-tb;
    font-size: 13px;
  }

  .sheet__nombre { right: 16px; bottom: 20px; }

  .splash__tagline { margin-top: 10px; font-size: 18px; }

  .grid { grid-template-columns: minmax(0, 1fr); }

  .grid--p1 { grid-template-rows: none; }

  .panel--wide,
  .panel--face,
  .cell--balloon,
  .panel--star { grid-column: 1; grid-row: auto; }

  .cell--balloon { height: 168px; }

  .caption { max-width: 86%; padding: 7px 11px 6px; font-size: 15px; }

  .balloon { font-size: 18px; }

  .balloon--face {
    inset: 0;
    width: fit-content;
    height: fit-content;
    max-width: 82%;
    margin: auto;
    padding: 1.1em 1.4em;
  }

  /* tail turns to point up into the face */
  .balloon--face .balloon__tail {
    left: 26%;
    top: -42px;
    transform: rotate(90deg);
  }

  .colophon { padding: 0 16px 48px; }

  .grid--p2 { row-gap: 22px; }

  .panel--p2a, .panel--p2b, .panel--p2c, .panel--p2d,
  .panel--p3a, .panel--p3b, .panel--p3c, .btn--avnu, .ca,
  .panel--p4a, .panel--p4b, .panel--end { grid-column: 1; grid-row: auto; }

  .balloon--p2d { top: 4%; max-width: 58%; padding: 0.8em 1em; font-size: 14px; }

  .balloon--p2d .balloon__tail {
    left: calc(50% - 38px);
    top: calc(100% - 10px);
    transform: rotate(-53.5deg) scale(0.7);
  }

  .band { font-size: 16px; }

  .panel--step img,
  .panel--p3b img { aspect-ratio: auto; }

  .btn--avnu { justify-self: start; margin: 4px 0 6px; }

  .ca { margin-top: 6px; padding: 16px 16px 14px; }

  .ca__full {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .ca__short { display: inline; }

  .ca__note { font-size: 14px; }

  .panel--end { min-height: 260px; padding: 28px 22px 26px; }
}
}