/* The author page's own style sheet. Nothing here depends on another site:
   the pieces that began in Cueball's style sheet (the paper and ink colours,
   Roboto, plain links) are copied in below. The fonts themselves come from
   Google Fonts, linked in index.html. */

/* === the palette, the fonts, the room on the page ==================== */

:root {
  --paper: #faf9f5;
  --ink: #1a1a1a;
  --muted: #666;
  --quiet: #5c5c5c;
  --recede: #868686;
  --white: #fff;
  --line: #ccc;
  --line-dark: #bbb;
  --mark: #fa8072;          /* the red */

  /* The poster's blue, lightened as far as white lettering allows: 4.6 to 1
     against white, over the 4.5 the web's accessibility standard (WCAG AA)
     asks for ordinary-sized text. Under a pointer it deepens to the poster's
     own blue, #0065a5 (6.2 to 1). */
  --blue: #0079c6;
  --blue-deep: #0065a5;
  --blue-pale: #7fadd7;     /* the ring round a focused button or field */

  --font-sans: 'Roboto', sans-serif;
  --font-serif: 'IM Fell English', serif;
  --font-display: 'Caprasimo', serif;

  --page: 62rem;            /* the widest the page gets, side room included */
  --side: 2rem;             /* room at each side on a phone */
  --measure: 36rem;         /* the widest a line of body text runs */
  --space-sm: 0.5rem;
  --space-xl: 2rem;
  --touch: 44px;
  --ease: 0.2s ease;
}

@media (min-width: 768px) {
  :root { --side: 3.5rem; }   /* room at each side on a tablet or larger */
}

/* === the page ======================================================== */

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

body {
  margin: 0 auto;
  padding: 0 var(--side);
  max-width: var(--page);
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

p { margin: 0 0 1em; max-width: var(--measure); }

figure { margin: 0; }

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--recede);
  text-underline-offset: 2px;
}

a:hover { text-decoration-color: var(--ink); }

/* Bold, for <strong>. Roboto's bold is loaded; Caprasimo and the Fell italic
   have only one weight, so a <strong> inside a heading or a callout is
   left as it is rather than faked. */
strong,
b { font-weight: 700; }

h1 strong, h2 strong, h3 strong,
.callout strong { font-weight: inherit; }

/* Out of sight, still read aloud (the sign-up's label). */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* === headings ======================================================== */

/* Every heading is Caprasimo in the red. It has one weight, so no bold is
   asked of it (a browser would fake one). */
h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--mark);
  margin: 0;
}

/* The big headings in capitals by the style sheet, so the words themselves
   stay in ordinary case. */
h1,
h2 {
  text-transform: uppercase;
  line-height: 1.02;
  letter-spacing: 0.01em;
}

h2 {
  font-size: clamp(1.9rem, 4.6vw, 2.9rem);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  line-height: 1.3;
  margin-bottom: 1.25rem;
}

/* Two voices in Fell italic: the blockquote, hung off a red rule at the
   left, and the callout, the same voice centred with no rule. */
blockquote,
.callout {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1.2;
}

blockquote {
  margin: 2.5rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--mark);
}

.callout {
  text-align: center;
  margin: 2.5rem auto;
}

/* === the section dividers ============================================ */

/* Each <hr> in index.html is one divider. Move one with its section. */
hr {
  height: 0;
  margin: 0;
  border: 0;
  border-top: 1px solid var(--line);
}

/* === the opening ===================================================== */

.hero {
  padding: clamp(3rem, 12vw, 8rem) 0 clamp(3rem, 8vw, 5rem);
}

/* The title is a brick, one word to a line, at every width. Each word is
   sized to the width of the block (cqi, the heading's own width) so all four
   end flush at the same edges: OLDSCHOOL 6.67em, SHAKESPEARE 8.22em,
   UNDERGROUND 8.78em, CLASSICS 5.34em in Caprasimo, each divisor carrying a
   hair of slack. The short words stand taller. On a phone the brick fills
   the page; on a wide screen it stops at a size that stays a poster and
   doesn't shout, and sits in the middle over the column below. */
h1 {
  container-type: inline-size;
  line-height: 0.92;
  max-width: 44rem;
  margin: 0 auto;
}

h1 .line { display: contents; }
h1 .line:last-child { color: var(--recede); }
h1 .line > span { display: block; }
h1 .w1 { font-size: calc(100cqi / 6.75); }
h1 .w2 { font-size: calc(100cqi / 8.3); }
h1 .w3 { font-size: calc(100cqi / 8.86); }
h1 .w4 { font-size: calc(100cqi / 5.42); }

/* Under the title, one column, centred and set centred: the welcome,
   Kim Holm's drawing, the words, and the knife and hammer last. */
.hero-column {
  max-width: var(--measure);
  margin: 0 auto;
  text-align: center;
}

.hero-column .callout:last-child { margin-bottom: 0; }

/* Multiply lets the page's paper show through the white of his, so the
   ink sits straight on the page. */
.hero-art { margin: 0; }

.hero-art img {
  display: block;
  width: 100%;
  max-width: 28rem;
  height: auto;
  margin: 0 auto;
  mix-blend-mode: multiply;
}

/* === the sections ==================================================== */

main > section { padding: clamp(3rem, 8vw, 5rem) 0; }
main > section:last-child { padding-bottom: clamp(4rem, 10vw, 7rem); }

.book,
.about {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
}

@media (min-width: 720px) {
  .book,
  .about {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 6vw, 4.5rem);
  }
}

/* The covers are photographs of the books with their own shadows, on
   nothing, so they sit straight on the paper. */
.cover img {
  display: block;
  width: 100%;
  max-width: 26rem;
  height: auto;
  margin: 0 auto;
}

/* A pill: straight sides, round at top and bottom. */
.portrait img {
  display: block;
  width: 100%;
  max-width: 26rem;   /* the same box as the book covers */
  height: auto;
  aspect-ratio: 3 / 5;
  object-fit: cover;
  object-position: 0% 35%;
  border-radius: 999px;
  margin: 0 auto;
}

.movement { text-align: center; }
.movement p { margin-left: auto; margin-right: auto; }

/* === buttons ========================================================= */

/* Pills in the blue. They work as a link or as a <button>. */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: var(--touch);
  margin-top: 0.75rem;
  padding: 1.05rem 2.5rem;
  font: inherit;
  font-size: 1.05rem;
  line-height: normal;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-align: center;
  text-decoration: none;
  color: var(--white);
  background-color: var(--blue);
  border: 1px solid var(--blue);
  border-radius: 999px;
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color var(--ease), transform var(--ease), box-shadow var(--ease);
}

.btn:hover,
.btn:focus {
  color: var(--white);
  text-decoration: none;
}

.btn:hover {
  background-color: var(--blue-deep);
  border-color: var(--blue-deep);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn:focus { outline: none; }
.btn:focus-visible { outline: 3px solid var(--blue-pale); outline-offset: 3px; }
.btn:disabled { opacity: 0.6; cursor: progress; transform: none; box-shadow: none; }

@media (min-width: 480px) {
  .btn { width: auto; min-width: 18rem; }
}

/* === the email sign-up =============================================== */

/* A pill field with the button under it, the same width. */
.signup {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-sm);
  max-width: 34rem;
  margin: 1.5rem auto 0;
}

.signup input[type="email"] {
  font: inherit;
  font-size: 1.05rem;
  min-height: var(--touch);
  width: 100%;
  padding: 1.05rem 1.6rem;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
}

.signup input[type="email"]::placeholder { color: var(--muted); }

.signup input[type="email"]:focus-visible {
  outline: 3px solid var(--blue-pale);
  outline-offset: 2px;
  border-color: var(--blue);
}

/* A field for robots: out of sight and out of reach of a person. */
.signup .trap { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.signup .btn { margin-top: 0; min-width: 0; width: 100%; }

/* After a send the button reads "Thank you": at full colour, and still. */
.signup.is-done .btn:disabled,
.signup.is-done .btn:disabled:hover {
  opacity: 1;
  cursor: default;
  background-color: var(--blue);
  border-color: var(--blue);
  transform: none;
  box-shadow: none;
}

.signup-note {
  flex: 1 1 100%;
  min-height: 1.5em;
  margin: 0.25rem auto 0;
  font-size: 0.75rem;
  color: var(--quiet);
}

/* === rising in as they come into view ================================ */

/* Pure CSS: each block's rise is tied to its own place on the screen, so it
   comes up as it scrolls in. A browser that can't do this (or a reader who
   has asked for less motion) simply sees everything in place. */
@keyframes rise {
  from { opacity: 0; transform: translateY(3rem); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .reveal {
      animation: rise ease-out both;
      animation-timeline: view();
      animation-range: entry 5% cover 30%;
    }
    /* The words follow the picture a moment behind it. */
    .book-text.reveal,
    .about-text.reveal { animation-range: entry 20% cover 38%; }
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
  .btn:hover { transform: none; }
}