/* datarates — see STYLE.md. Tokens here are copied from that file. */

/* ---------------------------------------------------------------- fonts -- */
/* Self-hosted so the site stays dependency-free, works offline, and makes no
   third-party request. Drop the woff2 files into fonts/ — see fonts/README.md.
   Until then the stack falls back to Helvetica Neue / Arial. */
@font-face {
  font-family: Roboto; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/roboto-400.woff2") format("woff2");
}
@font-face {
  font-family: Roboto; font-style: normal; font-weight: 500; font-display: swap;
  src: url("../fonts/roboto-500.woff2") format("woff2");
}
@font-face {
  font-family: Roboto; font-style: normal; font-weight: 700; font-display: swap;
  src: url("../fonts/roboto-700.woff2") format("woff2");
}

/* --------------------------------------------------------------- tokens -- */
:root {
  --c-cream:         #FFFDF1;
  --c-blue:          #173561;
  --c-pink:          #FF7272;

  --c-bg:            var(--c-cream);
  --c-fill-subtle:   #ECEDE6;
  --c-ink:           var(--c-blue);
  --c-ink-muted:     #516785;
  --c-ink-on-accent: var(--c-blue);
  --c-accent:        var(--c-pink);
  --c-accent-hover:  #F55F5F;
  --c-accent-active: #E24E4E;
  --c-border:        #74859B;
  --c-border-strong: var(--c-blue);
  --c-divider:       #B9C1C6;
  --c-focus:         var(--c-blue);
  --c-error:         #A32E2E;

  --font-sans:  Roboto, "Helvetica Neue", Arial, sans-serif;
  --fw-regular: 400;
  --fw-medium:  500;
  --fw-bold:    700;

  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-lg:   1.25rem;
  --fs-xl:   1.75rem;

  --lh-tight: 1.2;
  --lh-base:  1.5;

  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;

  --radius:       2px;
  --border-width: 1px;
  --control-h:    2.5rem;
  --measure:      50rem;

  --dur:  120ms;
  --ease: ease-out;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-bg:            var(--c-blue);
    --c-fill-subtle:   #334D72;
    --c-ink:           var(--c-cream);
    --c-ink-muted:     #B6C2D6;
    --c-border:        #6B80A3;
    --c-border-strong: var(--c-cream);
    --c-divider:       #334D72;
    --c-focus:         var(--c-cream);
    --c-error:         #FFB0B0;
    /* --c-accent and --c-ink-on-accent unchanged: pink fill, blue text. */
  }
}

/* ---------------------------------------------------------------- reset -- */
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, p, ul, li, figure { margin: 0; padding: 0; }
ul { list-style: none; }
[hidden] { display: none !important; }

body {
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-base);
  -webkit-text-size-adjust: 100%;
}

.numeric,
input[type="number"] { font-variant-numeric: tabular-nums; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

.skip-link {
  position: absolute; left: var(--sp-2); top: -4rem;
  background: var(--c-bg); color: var(--c-ink);
  padding: var(--sp-2) var(--sp-3);
  border: var(--border-width) solid var(--c-border-strong);
  border-radius: var(--radius);
  font-weight: var(--fw-medium); text-decoration: none;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: var(--sp-2); }

:focus-visible {
  outline: 3px solid var(--c-focus);
  outline-offset: 2px;
}

a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }

/* --------------------------------------------------------------- layout -- */
.page {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--sp-8) var(--sp-6) var(--sp-16);
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-8);             /* clear space: at least half the logo height */
  margin-bottom: var(--sp-12);
}

.logo {
  display: block;
  flex: 0 0 auto;
  color: var(--c-ink);          /* logo paths use fill: currentColor */
  text-decoration: none;
}
/* Masked rather than <img>, so the wordmark takes currentColor and inverts
   for dark mode from the one SVG file. */
.logo__mark {
  display: block;
  width: 120px;
  aspect-ratio: 856 / 477;
  background-color: currentColor;
  -webkit-mask: url("../assets/loud-numbers-logo.svg") no-repeat center / contain;
  mask: url("../assets/loud-numbers-logo.svg") no-repeat center / contain;
}

h1 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
}
.tagline { color: var(--c-ink-muted); margin-top: var(--sp-1); }

.section { margin-bottom: var(--sp-8); }
.section h2 {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  padding-bottom: var(--sp-2);
  margin-bottom: var(--sp-4);
  border-bottom: var(--border-width) solid var(--c-divider);
}

/* --------------------------------------------------------------- fields -- */
.field-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  align-items: flex-start;
}

.field { display: flex; flex-direction: column; flex: 1 1 8rem; min-width: 0; }
/* Rate fields share the row rather than wrapping a lone field onto line two. */
.field--xxs { flex: 0 1 4.5rem; }
.field--xs  { flex: 1 1 6rem; }
.field--sm  { flex: 1 1 8rem; }
.field-row > .field--fixed { flex: 0 1 10rem; }

.field label,
label[data-lbl] {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  margin-bottom: var(--sp-2);
}

/* Anchors the tooltip panel, and lets the label and (i) share a line. */
.field__label {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  margin-bottom: var(--sp-2);
}
.field__label label { margin-bottom: 0; }

.info {
  position: relative;
  flex: 0 0 auto;
  width: 1.125rem;
  height: 1.125rem;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  color: var(--c-ink-muted);
  border: var(--border-width) solid var(--c-border);
  border-radius: 50%;          /* a glyph, not a container — see STYLE.md */
  font: var(--fw-bold) 0.6875rem/1 var(--font-sans);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.info:hover, .info[aria-expanded="true"] {
  color: var(--c-ink);
  border-color: var(--c-border-strong);
}
/* Invisible 38px tap target without disturbing the label's line height. */
.info::after { content: ""; position: absolute; inset: -10px; }

.tip {
  position: absolute;
  top: calc(100% + var(--sp-2));
  left: 0;
  z-index: 10;
  width: max-content;
  max-width: min(20rem, calc(100vw - 2.5rem));
  padding: var(--sp-3);
  background: var(--c-bg);
  border: var(--border-width) solid var(--c-border-strong);
  border-radius: var(--radius);
  font-size: var(--fs-xs);
  font-weight: var(--fw-regular);
  line-height: var(--lh-base);
  color: var(--c-ink);
}
.tip--flip { left: auto; right: 0; }

input[type="text"],
input[type="number"],
select {
  width: 100%;
  height: var(--control-h);
  padding: var(--sp-2) var(--sp-3);
  background: var(--c-bg);
  color: var(--c-ink);
  border: var(--border-width) solid var(--c-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: var(--fs-base);
  transition: border-color var(--dur) var(--ease);
}
select {
  appearance: none;
  padding-right: var(--sp-6);
  background-image:
    linear-gradient(45deg, transparent 50%, currentColor 50%),
    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: right 1rem top 55%, right 0.7rem top 55%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
input:hover, select:hover { border-color: var(--c-border-strong); }

::placeholder { color: var(--c-ink-muted); opacity: 1; }

.hint {
  font-size: var(--fs-xs);
  color: var(--c-ink-muted);
  margin-top: var(--sp-1);
}
.hint--block { margin-top: var(--sp-4); max-width: 38rem; }

.field-error {
  flex-basis: 100%;
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  color: var(--c-error);
  margin-top: var(--sp-2);
}
/* Needs to out-specify the input[type=...] base rule above. */
input[aria-invalid="true"],
select[aria-invalid="true"] {
  border-width: 2px;
  border-color: var(--c-error);
}

/* -------------------------------------------------------------- buttons -- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  height: var(--control-h);
  padding: 0 var(--sp-4);
  border: var(--border-width) solid transparent;
  border-radius: var(--radius);
  background: none;
  color: var(--c-ink);
  font-family: inherit;
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.btn--primary {
  background: var(--c-accent);
  color: var(--c-ink-on-accent);
}
.btn--primary:hover  { background: var(--c-accent-hover); }
.btn--primary:active { background: var(--c-accent-active); }

.btn--secondary { border-color: var(--c-border-strong); }
.btn--secondary:hover { background: var(--c-fill-subtle); }

.btn--quiet {
  color: var(--c-ink-muted);
  padding: 0 var(--sp-2);
  font-size: var(--fs-sm);
}
.btn--quiet:hover { text-decoration: underline; text-underline-offset: 2px; }

.btn:disabled {
  background: var(--c-fill-subtle);
  border-color: transparent;
  color: var(--c-ink-muted);
  cursor: not-allowed;
}
.glyph { width: 0.7em; height: 0.7em; fill: currentColor; }
.glyph__stop { display: none; }
.is-playing .glyph__play { display: none; }
.is-playing .glyph__stop { display: block; }

/* ---------------------------------------------------------------- rates -- */
.rates { display: flex; flex-direction: column; gap: var(--sp-4); }

.rate {
  background: var(--c-fill-subtle);
  border-radius: var(--radius);
  padding: var(--sp-4);
}
.rate--off { opacity: 0.55; }

.rate__head {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}
.rate__name {
  flex: 1 1 10rem;
  max-width: 16rem;
  font-weight: var(--fw-medium);
}
.rate__interval {
  flex: 0 0 auto;
  font-size: var(--fs-sm);
  color: var(--c-ink-muted);
}
.rate__remove { margin-left: auto; }
.rate__count::before { content: "· "; }

.rate__count {
  font-size: var(--fs-xs);
  color: var(--c-ink-muted);
  white-space: nowrap;
}

/* The box stays 1.1rem, but the tap area is a full control height. */
.toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: var(--control-h);
  min-height: var(--control-h);
  margin-left: calc(var(--sp-2) * -1);
  cursor: pointer;
}
.toggle input {
  width: 1.1rem; height: 1.1rem;
  accent-color: var(--c-accent);
  cursor: pointer;
}

.rates-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
}

/* ------------------------------------------------------------- transport -- */
.section--actions { border-top: var(--border-width) solid var(--c-divider); padding-top: var(--sp-6); }
.transport { display: flex; flex-wrap: wrap; gap: var(--sp-3); }

.playbar { margin-top: var(--sp-6); }
.playbar__track {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}
.playbar__canvas {
  display: block;
  width: 100%;
  height: 14px;          /* replaced per-draw once lanes are known */
}
.playbar__head {
  position: absolute;
  top: 0; left: 0;
  width: 2px; height: 100%;
  background: var(--c-accent);
}
.playbar__clock { font-size: var(--fs-xs); color: var(--c-ink-muted); margin-top: var(--sp-1); }

.summary { font-size: var(--fs-sm); color: var(--c-ink-muted); margin-top: var(--sp-4); }
.error-block {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: var(--c-error);
  margin-top: var(--sp-2);
}

.colophon {
  margin-top: var(--sp-12);
  padding-top: var(--sp-4);
  border-top: var(--border-width) solid var(--c-divider);
  font-size: var(--fs-xs);
  color: var(--c-ink-muted);
  max-width: 38rem;
}

/* ----------------------------------------------------------- responsive -- */
@media (max-width: 640px) {
  .page { padding: var(--sp-6) var(--sp-4) var(--sp-12); }
  .logo__mark { width: 96px; }
  .field, .field--xxs, .field--xs, .field--sm { flex: 1 1 100%; }
  .rate__head { flex-wrap: wrap; }
  .rate__name { max-width: none; }
  .rate__interval, .rate__count { flex-basis: 100%; order: 3; }
  .rate__count::before { content: none; }
  .transport .btn { flex: 1 1 100%; justify-content: center; }
}

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