/**
 * Daily Uplift
 *
 * The visual job is to feel like a calm place to land for ninety seconds. Generous space,
 * one clear focal point (the message), soft edges, nothing that flashes or demands.
 *
 * Behind all of it is the sky at the hour it actually is where the visitor is standing —
 * night, the twilights, a low warm sunrise, high midday, and back down again. Its colours
 * are not written here: `sky-scene.js` computes them from the sun's real altitude and sets
 * the custom properties below on `:root`. This file only says what to do with them.
 *
 * Both light and dark are first-class. In a dark interface the same scene still travels
 * through the day, dimmed toward night, so it is never a lit window in a dark room.
 */

/*
 * Registering the scene properties as real types is what lets a change of sky *fade*.
 * An unregistered custom property is a string as far as the engine is concerned, so a
 * gradient built from one jumps between values; registered as <color>, it interpolates.
 * Browsers without `@property` simply cut between skies instead, which is a fine thing
 * to lose given the page repaints once a minute.
 */
@property --sky-top { syntax: '<color>'; inherits: true; initial-value: #23384f; }
@property --sky-mid { syntax: '<color>'; inherits: true; initial-value: #4c6486; }
@property --sky-low { syntax: '<color>'; inherits: true; initial-value: #9b8595; }
@property --glow { syntax: '<color>'; inherits: true; initial-value: rgb(255 178 122 / 0.45); }
@property --sun-color { syntax: '<color>'; inherits: true; initial-value: #ffbe80; }
@property --scrim { syntax: '<color>'; inherits: true; initial-value: rgb(5 9 18 / 0.34); }
@property --star-opacity { syntax: '<number>'; inherits: true; initial-value: 0.2; }
@property --sun-x { syntax: '<percentage>'; inherits: true; initial-value: 50%; }
@property --sun-y { syntax: '<percentage>'; inherits: true; initial-value: 96%; }
@property --sun-opacity { syntax: '<number>'; inherits: true; initial-value: 0.9; }
@property --glow-x { syntax: '<percentage>'; inherits: true; initial-value: 50%; }
@property --moon-x { syntax: '<percentage>'; inherits: true; initial-value: 50%; }
@property --moon-y { syntax: '<percentage>'; inherits: true; initial-value: 118%; }
@property --moon-opacity { syntax: '<number>'; inherits: true; initial-value: 0; }

:root {
  --ink: #23303d;
  --ink-soft: #52657a;
  --ink-faint: #6f8394;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #fdfcfa;
  --edge: rgba(35, 48, 61, 0.1);
  --accent: #b47d4a;
  --moon-lit: #f6efe2;
  --moon-dark: rgba(35, 48, 61, 0.16);
  --shadow: 0 1px 2px rgba(35, 48, 61, 0.04), 0 12px 32px rgba(35, 48, 61, 0.07);

  --measure: 34rem;
  --radius: 1.25rem;
  --step: clamp(1.5rem, 4vw, 2.75rem);

  /*
   * How far above the foot of the screen the horizon line sits. Small, and only there so a
   * body exactly on the horizon is still a whole disc rather than half of one clipped by
   * the bottom edge; below the line the sky simply carries on and a setting sun leaves.
   */
  --horizon: clamp(2.5rem, 7vh, 5rem);
}

/*
 * The dark-sky scheme. `app.js` sets `data-ink` from the brightness of the sky it just
 * painted, so the text flips once, around sunrise and again around sunset, rather than at
 * a clock hour that has nothing to do with the light. A viewer whose system asks for a
 * dark interface stays here all day.
 */
body[data-ink='light'] {
  --ink: #e8eef5;
  --ink-soft: #a7b6c6;
  --ink-faint: #90a2b3;
  --surface: rgba(20, 28, 42, 0.66);
  --surface-solid: #141c29;
  --edge: rgba(232, 238, 245, 0.14);
  --accent: #d8b083;
  --moon-dark: rgba(232, 238, 245, 0.12);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 16px 40px rgba(0, 0, 0, 0.35);
}

/*
 * The same scheme again for the frame before the script runs, so a dark-mode visitor never
 * sees a flash of dark text. Everything after that is driven by `data-ink`.
 */
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eef5;
    --ink-soft: #a7b6c6;
    --ink-faint: #90a2b3;
    --surface: rgba(20, 28, 42, 0.66);
    --surface-solid: #141c29;
    --edge: rgba(232, 238, 245, 0.14);
    --accent: #d8b083;
    --moon-dark: rgba(232, 238, 245, 0.12);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 16px 40px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

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

  /*
   * The whole scene crossfades from here. The properties are set on this element, so this
   * is where the transition has to live; everything below simply inherits values that are
   * already in motion. Slow on purpose — the sky is meant to be something you notice has
   * changed, not something you can watch changing.
   */
  transition:
    --sky-top 1.8s ease, --sky-mid 1.8s ease, --sky-low 1.8s ease,
    --glow 1.8s ease, --sun-color 1.8s ease, --scrim 1.8s ease,
    --star-opacity 2.4s ease,
    --sun-x 1.8s ease, --sun-y 1.8s ease, --sun-opacity 1.8s ease, --glow-x 1.8s ease,
    --moon-x 1.8s ease, --moon-y 1.8s ease, --moon-opacity 1.8s ease;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--step);

  padding: clamp(2rem, 7vh, 4.5rem) 1.25rem clamp(2rem, 6vh, 4rem);

  font-family: ui-serif, Georgia, 'Iowan Old Style', 'Palatino Linotype', serif;
  color: var(--ink);
  line-height: 1.6;
  transition: color 1.2s ease;
}

/* ---------- The scene ---------- */

.sky {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: linear-gradient(
    to bottom,
    var(--sky-top) 0%,
    var(--sky-mid) 54%,
    var(--sky-low) 100%
  );
}

/*
 * Everything celestial lives in here rather than in `.sky`, so that "on the horizon" means
 * the bottom of this box. That is the whole coordinate system `sky-scene.js` works in: a
 * body's vertical position is a percentage of the sky, and a setting sun passes 100%.
 */
.sky-field {
  position: absolute;
  inset: 0 0 var(--horizon);
}

/* The wash of light along the horizon, sitting under wherever the sun is. */
.glow {
  position: absolute;
  left: var(--glow-x);
  bottom: -16vmin;
  width: min(170vw, 95rem);
  height: min(95vw, 48rem);
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, var(--glow) 0%, rgb(0 0 0 / 0) 68%);
}

/*
 * The sun: one radial gradient doing the work of three things — a bright core, the bloom
 * around it, and the way both dissolve as it nears the horizon. `--sun-opacity` fades it
 * out across the degree either side of setting, so it goes into its own light rather than
 * switching off.
 */
.orb {
  position: absolute;
  transform: translate(-50%, -50%);
}

.orb-sun {
  left: var(--sun-x);
  top: var(--sun-y);
  width: clamp(8rem, 26vmin, 15rem);
  aspect-ratio: 1;
  opacity: var(--sun-opacity);
  background: radial-gradient(
    circle,
    var(--sun-color) 0 13%,
    var(--glow) 32%,
    rgb(0 0 0 / 0) 66%
  );
}

/*
 * The moon, drawn at its real phase by the same geometry as the panel below, and placed
 * where the moon actually is. It is faint in daylight and absent when it is new, which is
 * how it behaves.
 */
.orb-moon {
  left: var(--moon-x);
  top: var(--moon-y);
  width: clamp(1.75rem, 4.5vmin, 2.75rem);
  aspect-ratio: 1;
  opacity: var(--moon-opacity);
  filter: drop-shadow(0 0 0.75rem rgb(226 236 255 / 0.4));
}

.orb-moon svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Mirrored below the equator, for the same reason the panel's moon is. */
.orb-moon svg.mirrored {
  transform: scaleX(-1);
}

.scene-moon-disc {
  fill: rgb(255 255 255 / 0.06);
}

.scene-moon-lit {
  fill: #eef3fb;
}

/*
 * A faint starfield, revealed as the sun goes down. Pure CSS — no image requests.
 *
 * Fourteen stars, tiled. `background-size` cycles over the layers when the list is the
 * shorter of the two, so three tile sizes that do not divide into each other are enough to
 * fill the sky without the eye finding the repeat.
 */
.stars {
  position: absolute;
  inset: 0;
  opacity: var(--star-opacity);
  background-size: 43% 37%, 61% 53%, 79% 67%;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 18%, rgba(255, 255, 255, 0.85), transparent),
    radial-gradient(1px 1px at 28% 42%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1.5px 1.5px at 47% 12%, rgba(255, 255, 255, 0.75), transparent),
    radial-gradient(1px 1px at 63% 31%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1.5px 1.5px at 78% 8%, rgba(255, 255, 255, 0.8), transparent),
    radial-gradient(1px 1px at 88% 38%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1px 1px at 35% 62%, rgba(255, 255, 255, 0.45), transparent),
    radial-gradient(1.5px 1.5px at 71% 55%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1px 1px at 6% 52%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1.5px 1.5px at 21% 71%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 42% 26%, rgba(255, 255, 255, 0.42), transparent),
    radial-gradient(1px 1px at 56% 66%, rgba(255, 255, 255, 0.38), transparent),
    radial-gradient(1.5px 1.5px at 92% 20%, rgba(255, 255, 255, 0.65), transparent),
    radial-gradient(1px 1px at 83% 61%, rgba(255, 255, 255, 0.44), transparent);
}


/*
 * A soft wash at the top and foot of the scene, in whichever direction the page's text is
 * going. It buys back the contrast that a saturated sky costs the masthead and the footer,
 * the only text here that does not sit on a card of its own, and it reads as haze.
 */
.sky::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom, var(--scrim) 0%, rgb(0 0 0 / 0) 32%),
    linear-gradient(to top, var(--scrim) 0%, rgb(0 0 0 / 0) 28%);
}

/* ---------- Masthead ---------- */

.masthead {
  text-align: center;
  max-width: var(--measure);
}

.today {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 0.2rem 0.55rem;
  margin: 0 0 0.35rem;
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/*
  Tabular figures so a minute ticking over does not nudge the date sideways, and a separator
  carried by the clock rather than typed into the markup so nothing is left dangling on the
  line above when the two wrap apart on a narrow screen.
*/
.clock {
  font-variant-numeric: tabular-nums;
}

.clock::before {
  content: '·';
  margin-right: 0.55rem;
  letter-spacing: 0;
}

.wordmark {
  margin: 0;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* ---------- Message ---------- */

main {
  width: 100%;
  max-width: var(--measure);
  display: flex;
  flex-direction: column;
  gap: var(--step);
}

.message-card {
  background: var(--surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1.75rem, 5vw, 2.75rem);
}

.message {
  margin: 0;
  font-size: clamp(1.2rem, 3.4vw, 1.5rem);
  line-height: 1.55;
  text-wrap: pretty;
  opacity: 0;
  transition: opacity 0.9s ease;
}

.message.is-loaded {
  opacity: 1;
}

.message p {
  margin: 0;
}

.message-loading {
  color: var(--ink-faint);
  font-style: italic;
}

/* Opening quote mark, set outside the text so it does not disturb the measure. */
.message.is-loaded::before {
  content: '';
  display: block;
  width: 2rem;
  height: 1px;
  margin-bottom: 1.25rem;
  background: var(--accent);
  opacity: 0.6;
}

/* ---------- Cycles ---------- */

.cycles {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.section-heading {
  margin: 0 0 0.25rem;
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.panel {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.35rem clamp(1.25rem, 4vw, 1.75rem);
  background: var(--surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
}

.panel-body {
  flex: 1;
  min-width: 0;
}

.panel-label {
  margin: 0 0 0.2rem;
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.panel-headline {
  margin: 0;
  font-size: 1.2rem;
}

.panel-detail {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
  text-wrap: pretty;
}

/* ---------- Moon ---------- */

.moon-visual {
  flex: none;
  width: 5rem;
  height: 5rem;
}

.moon-visual svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Southern-hemisphere viewers see the moon mirrored; show them their own sky. */
.moon-visual svg.mirrored {
  transform: scaleX(-1);
}

.moon-disc {
  fill: var(--moon-dark);
}

/* The `d` attribute is not CSS-transitionable when set via setAttribute, so the phase
   change is instantaneous by design rather than animated. */
.moon-lit {
  fill: var(--moon-lit);
  filter: drop-shadow(0 0 12px rgba(246, 239, 226, 0.35));
}

/*
  The lunation timeline: where today sits in the current lunar month.

  The track is not a progress bar. It is shaded the way the moon is lit across the month —
  dark at new, bright at full, dark again at new — so a marker three quarters of the way
  along cannot be misread as "three quarters lit". The position along the track is the only
  thing that means anything; the shading underneath is there to say what the position means.
*/
.lunation {
  margin: 0.95rem 0 0;
}

.lunation-track {
  position: relative;
  height: 0.45rem;
  border: 1px solid var(--edge);
  border-radius: 999px;
  background: linear-gradient(
    to right,
    var(--moon-dark) 0%,
    var(--moon-lit) 50%,
    var(--moon-dark) 100%
  );
}

/* The quarters, unlabelled: structure the eye can pick up without another row of words. */
.lunation-tick {
  position: absolute;
  top: -0.2rem;
  bottom: -0.2rem;
  width: 1px;
  background: var(--ink-faint);
  opacity: 0.35;
}

.lunation-tick.at-first-quarter {
  left: 25%;
}

/* Full gets a touch more weight: it is the one the eye looks for, and the one we label. */
.lunation-tick.at-full {
  left: 50%;
  opacity: 0.55;
}

.lunation-tick.at-last-quarter {
  left: 75%;
}

/*
  Today. `--lunation-position` is set from the lunation fraction in app.js; at the very start
  or end of a month the marker sits half outside the track, which is exactly where it belongs,
  so nothing here clips.
*/
.lunation-marker {
  position: absolute;
  top: 50%;
  left: var(--lunation-position, 0%);
  width: 0.62rem;
  height: 0.62rem;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--accent);
  /* A halo of the panel's own surface, so the dot reads against dark and bright track alike. */
  box-shadow: 0 0 0 0.22rem var(--surface);
  transition: left 0.8s ease;
}

.lunation-scale {
  display: flex;
  justify-content: space-between;
  margin: 0.4rem 0 0;
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

@media (prefers-reduced-motion: reduce) {
  .lunation-marker {
    transition: none;
  }
}

/* ---------- Fact lists ---------- */

.mini-facts {
  margin: 0.85rem 0 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 1rem;
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.85rem;
}

.mini-facts:empty {
  margin: 0;
}

.mini-facts dt {
  color: var(--ink-faint);
  white-space: nowrap;
}

.mini-facts dd {
  margin: 0;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

/* ---------- Location ---------- */

.location {
  text-align: center;
  padding: 0 0.5rem;
}

.location-status {
  margin: 0 0 1.1rem;
  font-size: 0.95rem;
  color: var(--ink-soft);
  text-wrap: pretty;
}

/* ---------- Place picker ---------- */

/*
 * Deliberately two plain `<select>`s. They come with keyboard support, type-ahead and a
 * native picker sheet on phones, all of which a hand-rolled dropdown would have to
 * reimplement worse. Only the resting state is restyled — the chevron and the open list
 * stay native, and follow `color` and the page's `color-scheme` into dark mode on their own.
 */
.picker {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin: 0 auto 1.1rem;
  max-width: 30rem;
}

.field {
  flex: 1 1 12rem;
  max-width: 16rem;
  margin: 0;
  text-align: left;
}

.field-label {
  display: block;
  margin-bottom: 0.35rem;
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.field-input {
  width: 100%;
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--surface-solid);
  border: 1px solid var(--edge);
  border-radius: 0.85rem;
  padding: 0.55rem 0.7rem;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: box-shadow 0.2s ease, opacity 0.2s ease;
}

.field-input:disabled {
  opacity: 0.55;
  cursor: default;
}

.field-input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.location-actions {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.button {
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--surface-solid);
  border: 1px solid var(--edge);
  border-radius: 999px;
  padding: 0.55rem 1.35rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  box-shadow: var(--shadow);
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button:disabled {
  opacity: 0.55;
  cursor: default;
}

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

.button-quiet {
  background: transparent;
  box-shadow: none;
  color: var(--ink-faint);
}

.location-note {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--ink-faint);
  min-height: 1.2em;
  text-wrap: pretty;
}

/* ---------- Footer ---------- */

.footer {
  max-width: var(--measure);
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.85rem;
}

.footer p {
  margin: 0 0 0.6rem;
}

.fine-print {
  font-size: 0.78rem;
  line-height: 1.5;
  opacity: 0.85;
  text-wrap: pretty;
}

/* ---------- Utility ---------- */

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

@media (max-width: 26rem) {
  .panel {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .mini-facts {
    justify-content: center;
  }
}

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