/* Foolscap — a ruled sheet of foolscap paper: cream stock, feint blue rules, red margin. */

:root {
  --paper: #f3eee3;
  --ink: #1f2a44;
  --ink-soft: #55607a;
  --rule: rgba(84, 128, 186, 0.18);
  --margin: #c8473a;
  --line-height: 2rem; /* spacing of the ruled lines */
  --margin-x: 5rem;

  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  color-scheme: light;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, transparent calc(var(--margin-x) - 1px), var(--margin) calc(var(--margin-x) - 1px), var(--margin) var(--margin-x), transparent var(--margin-x)),
    repeating-linear-gradient(to bottom, transparent 0, transparent calc(var(--line-height) - 1px), var(--rule) calc(var(--line-height) - 1px), var(--rule) var(--line-height));
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.sheet {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 2rem 2rem 2rem calc(var(--margin-x) + 2.5rem);
  max-width: 72rem;
}

/* Masthead */

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.wordmark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-variation-settings: "opsz" 144;
}

.label {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* Main */

.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 40rem;
  padding: 4rem 0;
  animation: rise 700ms ease-out both;
}

h1 {
  margin: 1rem 0 1.5rem;
  font-weight: 400;
  font-size: clamp(2.75rem, 7vw, 5.25rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144;
}

h1 em {
  font-style: italic;
  font-weight: 300;
  color: var(--margin);
}

.lede {
  margin: 0 0 2.5rem;
  max-width: 34rem;
  color: var(--ink-soft);
}

/* Signup form — the input is "written on the line" */

.signup {
  max-width: 34rem;
}

.signup-row {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.signup input[type="email"] {
  flex: 1;
  min-width: 0;
  padding: 0.6rem 0;
  border: 0;
  border-bottom: 2px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font: italic 300 1.375rem/1.2 var(--serif);
}

.signup input[type="email"]::placeholder {
  color: var(--ink-soft);
  opacity: 0.55;
}

.signup input[type="email"]:focus {
  outline: none;
  border-bottom-color: var(--margin);
}

.signup button {
  flex: none;
  padding: 0.85rem 1.5rem;
  border: 2px solid var(--ink);
  border-radius: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 150ms, color 150ms;
}

.signup button:hover {
  background: transparent;
  color: var(--ink);
}

.signup button:focus-visible {
  outline: 2px solid var(--margin);
  outline-offset: 3px;
}

.signup button:disabled {
  opacity: 0.6;
  cursor: progress;
}

.fineprint {
  margin: 0.9rem 0 0;
  font-size: 0.875rem;
  color: var(--ink-soft);
}

.status {
  margin: 0.75rem 0 0;
  min-height: 1.6em;
  font-family: var(--mono);
  font-size: 0.875rem;
}

.status.is-error {
  color: var(--margin);
}

.signup.is-done .signup-row,
.signup.is-done .fineprint,
.signup.is-done > .label {
  display: none;
}

.signup.is-done .status {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.375rem;
  color: var(--ink);
}

/* Footer */

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

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

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .content { animation: none; }
}

@media (max-width: 640px) {
  :root {
    --margin-x: 1.75rem;
  }

  .sheet {
    padding: 1.5rem 1rem 1.5rem calc(var(--margin-x) + 1rem);
  }

  .wordmark {
    font-size: 1.25rem;
  }

  .content {
    padding: 3rem 0;
  }

  .signup-row {
    flex-direction: column;
  }

  .signup button {
    width: 100%;
  }
}