/* =============================================================================
   LOCK IN — registration form styles

   White ground, Deep Blue type, copper for the things you press. Same five a2co
   colours as the game, used the other way up: the game is a lit object in a dark
   room, this is a document you read in daylight on a phone.

   Readability first. Dark text on white is the highest-contrast pairing available,
   the body type is 17px and up, and line lengths are held short.

   Mobile-first, because nearly every one of these will be filled in one-handed,
   standing up, having just scanned a QR code.
   ========================================================================== */

@font-face {
  font-family: 'Degular Display';
  src: url('fonts/DegularDisplay-Regular.otf') format('opentype');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'Degular Display';
  src: url('fonts/DegularDisplay-Medium.otf') format('opentype');
  font-weight: 500;
  font-display: swap;
}

:root {
  --blue:    #12284B;
  --copper:  #b96846;
  --green:   #477066;
  --mustard: #E5D99E;
  --gray:    #5C6170;
  --white:   #FFFFFF;

  /* Deep Blue at low opacity rather than a new grey, so every tone on the page is
     still the brand palette.

     MEASURED against white: --ink is 14.7:1 and --ink-soft is 4.94:1, so both clear
     the 4.5:1 needed for body text. --ink-faint is 2.5:1 and is therefore for
     DECORATION ONLY — borders, dividers, disabled states. It must never carry text
     somebody has to read. Copper on white measures 4.09:1, which is also below the
     bar, so copper is reserved for fills and for text at 24px and up, where the
     large-text threshold of 3:1 applies. */
  --ink:        #12284B;
  --ink-soft:   rgba(18, 40, 75, 0.66);
  --ink-faint:  rgba(18, 40, 75, 0.42);
  --line:       rgba(18, 40, 75, 0.16);
  --line-solid: rgba(18, 40, 75, 0.28);
  --tint:       rgba(18, 40, 75, 0.035);

  --radius: 12px;
}

* { box-sizing: border-box; }

html { background: #F4F5F7; }

body {
  margin: 0;
  padding: 0;
  color: var(--ink);
  font-family: 'Degular Display', system-ui, -apple-system, sans-serif;
  font-weight: 400;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* The card. On a phone it fills the screen; on a desktop it sits as a sheet on a
   soft grey ground, which is what stops a white page on a white browser looking
   like an unstyled document. */
.page {
  max-width: 620px;
  margin: 0 auto;
  background: var(--white);
  padding: 36px 22px 64px;
  min-height: 100vh;
}
@media (min-width: 660px) {
  .page {
    margin: 40px auto;
    min-height: 0;
    border-radius: 20px;
    padding: 48px 56px 56px;
    box-shadow: 0 2px 40px rgba(18, 40, 75, 0.10);
  }
}

.hidden { display: none !important; }

/* ---- Masthead ------------------------------------------------------------ */
.masthead {
  text-align: center;
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.logo { width: 118px; height: auto; display: block; margin: 0 auto 26px; }

h1 {
  font-weight: 500;
  font-size: 42px;
  line-height: 1.1;
  letter-spacing: 4px;
  margin: 0 0 12px;
  color: var(--ink);
}

.tagline { margin: 0; color: var(--ink-soft); font-size: 17px; }
.tagline strong { color: var(--copper); font-weight: 500; }

/* ---- Prizes -------------------------------------------------------------- */
.prizes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 34px;
}
.prize {
  background: var(--tint);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 8px;
  text-align: center;
}
.prize-what {
  display: block;
  font-weight: 500;
  font-size: 20px;
  color: var(--ink);
  line-height: 1.2;
}
.prize-for {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 4px;
  line-height: 1.3;
}

.prize-daily {
  margin: -22px 0 34px;
  text-align: center;
  font-size: 16px;
  color: var(--ink-soft);
}
.prize-daily strong { color: var(--ink); font-weight: 500; }

/* ---- Fields -------------------------------------------------------------- */
.row.two { display: grid; grid-template-columns: 1fr; }
@media (min-width: 480px) {
  .row.two { grid-template-columns: 1fr 1fr; gap: 16px; }
}

.field { margin-bottom: 20px; }

label {
  display: block;
  font-weight: 500;
  font-size: 15px;
  color: var(--ink);
  margin-bottom: 7px;
  /* Sentence case, not uppercase: uppercase labels are measurably slower to read
     and this form has ten of them. */
}

input[type="text"], input[type="email"], input[type="tel"], select {
  width: 100%;
  padding: 14px 15px;
  background: var(--white);
  border: 1.5px solid var(--line-solid);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: inherit;
  font-size: 17px;
  /* 17px minimum, or iOS Safari zooms the page when a field is focused and the
     layout jumps under the user's thumb. */
  line-height: 1.4;
  appearance: none;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

input::placeholder { color: var(--ink-faint); }

select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink) 50%),
    linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position: calc(100% - 21px) 52%, calc(100% - 15px) 52%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 42px;
  cursor: pointer;
}
select:disabled {
  background-color: var(--tint);
  color: var(--ink-faint);
  cursor: not-allowed;
}
select option { color: var(--ink); }
select optgroup { font-weight: 500; color: var(--ink-soft); }

input:focus, select:focus {
  outline: none;
  border-color: var(--copper);
  box-shadow: 0 0 0 3px rgba(185, 104, 70, 0.16);
}

/* Copper border plus a faint copper wash. The error message beside the field also
   carries a copper dot, so an invalid field is signalled by wording and position as
   well as by colour, which matters for anybody who cannot distinguish it. */
input.invalid, select.invalid {
  border-color: var(--copper);
  background-color: rgba(185, 104, 70, 0.05);
}

.hint { margin: 7px 0 0; font-size: 14px; color: var(--ink-soft); }

.error {
  margin: 7px 0 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  padding-left: 13px;
  position: relative;
}
/* A copper marker beside the message. The field's border also turns copper, so
   the error is carried by position, wording and shape as well as by colour —
   which matters for anybody who cannot distinguish the colour at all. */
.error::before {
  content: '';
  position: absolute;
  left: 0; top: 8px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--copper);
}
.error:empty { display: none; }
.form-error { text-align: center; margin-top: 16px; font-size: 15px; padding-left: 0; }
.form-error::before { display: none; }

/* ---- Consent ------------------------------------------------------------- */
.consent {
  background: var(--tint);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin: 30px 0 20px;
}
.check { display: flex; gap: 14px; align-items: flex-start; cursor: pointer; }
.check input {
  appearance: none;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  margin: 0;
  border: 2px solid var(--line-solid);
  border-radius: 7px;
  background: var(--white);
  cursor: pointer;
  position: relative;
  transition: background 0.12s ease, border-color 0.12s ease;
}
.check input:checked { background: var(--copper); border-color: var(--copper); }
.check input:checked::after {
  content: '';
  position: absolute;
  left: 8px; top: 3px;
  width: 5px; height: 12px;
  border: solid var(--white);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
}
.check input:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(185, 104, 70, 0.22);
}
.check span { font-size: 16px; line-height: 1.5; color: var(--ink); }
.check strong { font-weight: 500; }
.optional { margin: 11px 0 0 40px; font-size: 14px; color: var(--ink-faint); }

/* ---- Privacy notice ------------------------------------------------------ */
.notice {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-bottom: 28px;
}
.notice p {
  margin: 0 0 11px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.notice p:last-child { margin-bottom: 0; }
.notice strong { color: var(--ink); font-weight: 500; }

/* ---- Buttons ------------------------------------------------------------- */
button {
  width: 100%;
  padding: 18px;
  border: none;
  border-radius: 999px;
  background: var(--copper);
  color: var(--white);
  font-family: inherit;
  font-weight: 500;
  /* 24px is not a style choice. White on copper measures 4.09:1, which passes the
     3:1 large-text threshold but not the 4.5:1 normal-text one, and 24px is where
     "large" begins. Shrinking this text would fail the contrast check. */
  font-size: 24px;
  letter-spacing: 0.4px;
  cursor: pointer;
  transition: transform 0.1s ease, filter 0.15s ease;
}
button:hover { filter: brightness(1.06); }
button:active { transform: scale(0.985); }
button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(185, 104, 70, 0.26);
}

button.secondary {
  background: var(--white);
  border: 1.5px solid var(--line-solid);
  color: var(--ink);
  font-size: 17px;   /* Deep Blue on white is 14.7:1, so any size is fine here. */
  padding: 15px;
}

/* ---- Confirmation -------------------------------------------------------- */
.code-card {
  background: var(--blue);
  border-radius: 20px;
  padding: 30px 20px 26px;
  text-align: center;
  margin-bottom: 28px;
}
.code-label {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--mustard);
}
.code {
  margin: 0;
  font-weight: 500;
  font-size: 58px;
  line-height: 1;
  letter-spacing: 9px;
  /* Tabular figures, so six digits sit in an even block instead of jittering on
     the 1s. It has to be readable across a stand. */
  font-variant-numeric: tabular-nums;
  color: var(--white);
}
/* The address the code went to. Smaller than the old six-digit code because an
   email address is longer and must not overflow the card on a narrow phone, but
   still the largest thing in the box -- it is what the student needs to read back
   to check they typed it correctly. */
.code-email {
  margin: 0;
  font-weight: 500;
  font-size: 24px;
  line-height: 1.25;
  color: var(--white);
  word-break: break-all;
}

.keep-warning {
  margin: 0 0 26px;
  padding: 16px 18px;
  border: 1.5px solid var(--copper);
  border-radius: var(--radius);
  background: rgba(185, 104, 70, 0.06);
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
}
.keep-warning strong { font-weight: 500; }

.code-note {
  margin: 12px 0 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
}

.done-details { margin-bottom: 26px; }
.done-details p {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
  margin: 0;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}
.done-details span { color: var(--ink-faint); flex: 0 0 auto; }
.done-details strong {
  font-weight: 500;
  color: var(--ink);
  text-align: right;
}

.rules {
  margin: 0 0 28px;
  padding: 18px 20px 18px 38px;
  background: var(--tint);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.6;
}
.rules li { margin-bottom: 7px; }
.rules li:last-child { margin-bottom: 0; }

/* ---- Prize note ---------------------------------------------------------- */
.prize-note {
  display: inline-block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-faint);
}

/* ---- The rules page ------------------------------------------------------ */
.terms { margin-bottom: 8px; }

.terms-lead {
  margin: 0 0 30px;
  padding: 16px 18px;
  background: var(--tint);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
}

.terms h2 {
  margin: 32px 0 10px;
  font-weight: 500;
  /* 19px, not 24: these are signposts through a long page, not headlines
     competing with the one at the top. */
  font-size: 19px;
  letter-spacing: 0.3px;
  color: var(--ink);
}

.terms p,
.terms li {
  margin: 0 0 11px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
}
.terms strong { color: var(--ink); font-weight: 500; }
.terms ul, .terms ol { margin: 0 0 11px; padding-left: 22px; }
.terms li { margin-bottom: 7px; }

.terms-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 14px;
}
.terms-table td {
  padding: 11px 4px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  color: var(--ink-soft);
  vertical-align: top;
}
.terms-table td:first-child { width: 42%; }
.terms-table strong { color: var(--ink); font-weight: 500; }

.terms-updated {
  margin-top: 30px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-faint);
}

/* Copper on white measures 4.09:1 -- below the 4.5:1 that normal-size text needs,
   MEASURED not assumed. So the link TEXT is ink (14.7:1) and the copper moves to
   the underline, where it is decoration rather than something anybody has to
   read. Same accent, same affordance, and it passes. */
.notice a,
.terms-back {
  color: var(--ink);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--copper);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.notice a:hover,
.terms-back:hover { text-decoration-thickness: 3px; }
.terms-back { font-size: 16px; }