/* Ephyra site. Colours, type, shape and motion follow docs/identity/VISION.md ("Bioluminescence").
   Every colour is a token from §3; there are no other hex values in this file. */

@font-face {
  font-family: "Outfit";
  src: url("fonts/outfit.ttf") format("truetype");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  color-scheme: dark light;

  /* §3.1 dark scheme (the brand scheme, default) */
  --primary: #4FD8F0;
  --on-primary: #00303A;
  --primary-container: #0E4F5C;
  --on-primary-container: #BDF4FF;
  --secondary-container: #232E66;
  --on-secondary-container: #DDE1FF;
  --tertiary: #B9A3FF;
  --surface: #070B16;
  --on-surface: #E4FBFF;
  --on-surface-variant: #9FB3C8;
  --surface-container-lowest: #03060D;
  --surface-container-low: #0D1322;
  --surface-container: #121A2C;
  --surface-container-high: #182238;
  --surface-container-highest: #1F2B45;
  --outline: #5A6B85;
  --outline-variant: #2A3650;
  --scrim: #000000;

  /* §3.3 brand tokens */
  --glow: rgb(79 216 240 / 0.45);
  --speck: var(--on-surface);

  /* §4 type */
  --display: "Outfit", system-ui, Roboto, sans-serif;
  --body: system-ui, Roboto, "Segoe UI", sans-serif;

  /* §5 shape */
  --r-xs: 8px;
  --r-s: 12px;
  --r-m: 16px;
  --r-l: 24px;

  /* §6 motion */
  --t-short: 200ms;
  --t-medium: 350ms;
  --t-long: 700ms;
  --ease-enter: cubic-bezier(0.05, 0.7, 0.1, 1);
  --ease-exit: cubic-bezier(0.3, 0, 0.8, 0.15);

  --gutter: 16px;
  --measure: 1100px;
}

@media (prefers-color-scheme: light) {
  :root {
    /* §3.2 light scheme */
    --primary: #007A8E;
    --on-primary: #FFFFFF;
    --primary-container: #BDF4FF;
    --on-primary-container: #00303A;
    --secondary-container: #DDE1FF;
    --on-secondary-container: #0A1560;
    --tertiary: #6B4FD1;
    --surface: #F3FBFF;
    --on-surface: #0B1326;
    --on-surface-variant: #3F4F64;
    --surface-container-lowest: #FFFFFF;
    --surface-container-low: #E9F5FA;
    --surface-container: #DFEFF5;
    --surface-container-high: #D4E8EF;
    --surface-container-highest: #C8E0E9;
    --outline: #6B7A90;
    --outline-variant: #BCC9D8;

    /* §6: no glow in light, nothing to glow against */
    --glow: transparent;
  }
}

/* ---------- base ---------- */

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

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

body {
  margin: 0;
  background: var(--surface);
  color: var(--on-surface);
  font: 400 1rem/1.5 var(--body);
  overflow-x: hidden;
}

h1,
h2,
h3 {
  font-family: var(--display);
  margin: 0;
  color: var(--on-surface);
}

h1 {
  font-size: clamp(2.5rem, 2rem + 2.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.15;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.25;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--on-surface);
  text-decoration: underline;
  text-decoration-color: var(--outline);
  text-underline-offset: 0.15em;
  transition: color var(--t-short) var(--ease-enter), text-decoration-color var(--t-short) var(--ease-enter);
}

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

/* The web's focus ring: the TV focus ring with its glow (§6, item 1 of three). */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  box-shadow: 0 0 10px 0 var(--glow);
  border-radius: var(--r-xs);
}

code {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 0.875em;
  background: var(--surface-container-high);
  color: var(--on-surface-variant);
  padding: 0.1em 0.4em;
  border-radius: var(--r-xs);
  white-space: nowrap;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

ul {
  margin: 0 0 1em;
  padding-left: 1.2em;
}

li {
  margin: 0.35em 0;
}

li::marker {
  color: var(--on-surface-variant);
}

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.muted {
  color: var(--on-surface-variant);
}

.meta {
  font: 500 0.875rem/1.5 var(--body);
  color: var(--on-surface-variant);
  font-variant-numeric: tabular-nums;
}

/* ---------- pills (§5) ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font: 500 0.9375rem/1 var(--body);
  text-decoration: none;
  border: 1px solid transparent;
  transition: box-shadow var(--t-short) var(--ease-enter), background-color var(--t-short) var(--ease-enter), color var(--t-short) var(--ease-enter);
}

.btn svg {
  width: 1.125em;
  height: 1.125em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Play is the one thing that sits on a primary fill (§7); on the web, that is Download. */
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--on-primary);
  box-shadow: 0 0 10px 0 var(--glow);
}

.btn-secondary {
  background: var(--surface-container-high);
  color: var(--on-surface);
  border-color: var(--outline-variant);
}

.btn-secondary:hover {
  color: var(--on-surface);
  background: var(--surface-container-highest);
}

/* ---------- header ---------- */

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--outline-variant);
}

.top .wrap {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 56px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font: 600 1.125rem/1 var(--display);
  text-decoration: none;
  color: var(--on-surface);
}

.brand img {
  width: 28px;
  height: 28px;
}

.top nav {
  margin-left: auto;
  display: flex;
  gap: 1.25rem;
  font: 500 0.875rem/1 var(--body);
}

.top nav a {
  text-decoration: none;
  color: var(--on-surface-variant);
}

.top nav a:hover {
  color: var(--primary);
}

@media (max-width: 600px) {
  .top nav .optional {
    display: none;
  }
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 6vw, 4rem);
  overflow: hidden;
}

.hero .wrap {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 3rem;
  align-items: center;
}

.hero-copy {
  max-width: 34rem;
}

.hero-mark {
  width: 96px;
  height: 96px;
  margin-bottom: 1.5rem;
  /* §10.5: the one brand moment. The mark with its glow on surface. */
  filter: drop-shadow(0 0 10px var(--glow));
}

.hero p.lead {
  font-size: 1.25rem;
  color: var(--on-surface-variant);
  margin: 1rem 0 1.75rem;
  max-width: 28rem;
}

.hero .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hero-shots {
  position: relative;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
  align-items: end;
}

.hero-shots .tv {
  border-radius: var(--r-l);
  overflow: hidden;
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
}

.hero-shots .phone {
  border-radius: var(--r-m);
  overflow: hidden;
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
}

/* Bioluminescent specks (§9): sparse, slow, dimmer than the mark, hero only. */
.specks {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.specks span {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--speck);
  opacity: 0;
  animation: drift var(--d, 40s) linear var(--delay, 0s) infinite;
}

@keyframes drift {
  0% {
    transform: translate3d(0, 0, 0);
    opacity: 0;
  }
  15% {
    opacity: var(--o, 0.35);
  }
  85% {
    opacity: var(--o, 0.35);
  }
  100% {
    transform: translate3d(var(--dx, 10px), -60px, 0);
    opacity: 0;
  }
}

@media (prefers-color-scheme: light) {
  .specks {
    display: none;
  }
}

@media (max-width: 860px) {
  .hero .wrap {
    grid-template-columns: 1fr;
  }

  .hero-shots {
    max-width: 36rem;
  }
}

/* ---------- sections ---------- */

section {
  padding: clamp(2.5rem, 6vw, 5rem) 0;
  scroll-margin-top: 56px;
}

section + section {
  border-top: 1px solid var(--outline-variant);
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section-head p {
  color: var(--on-surface-variant);
  margin-top: 0.5rem;
}

.feature {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  gap: 2rem 3rem;
  align-items: start;
  padding: 2rem 0;
}

.feature + .feature {
  border-top: 1px solid var(--outline-variant);
}

.feature h3 {
  margin-bottom: 0.75rem;
}

.feature ul {
  color: var(--on-surface-variant);
}

.feature li strong {
  color: var(--on-surface);
  font-weight: 500;
}

.shots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.shots.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.shots.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.shots.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.shots .wide {
  grid-column: 1 / -1;
}

figure {
  margin: 0;
}

figure img {
  width: 100%;
  border-radius: var(--r-s);
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
}

figure.landscape img,
figure.tv img {
  border-radius: var(--r-m);
}

figcaption {
  margin-top: 0.5rem;
  font: 400 0.875rem/1.4 var(--body);
  color: var(--on-surface-variant);
}

@media (max-width: 860px) {
  .feature {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .shots,
  .shots.three,
  .shots.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- tv ---------- */

.tv-hero img {
  width: 100%;
  border-radius: var(--r-l);
}

.tv-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 1.25rem 0 2rem;
}

.tv-grid figure img {
  border-radius: var(--r-m);
}

.fold {
  max-width: 26rem;
  margin: 0 auto 2rem;
}

.tv-list {
  columns: 2;
  column-gap: 3rem;
  color: var(--on-surface-variant);
  max-width: 60rem;
}

.tv-list li {
  break-inside: avoid;
}

@media (max-width: 640px) {
  .tv-grid {
    grid-template-columns: 1fr;
  }

  .tv-list {
    columns: 1;
  }
}

/* ---------- install ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

@media (max-width: 640px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--r-m);
  padding: 1.5rem;
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p:last-child,
.card ul:last-child,
.card table:last-child {
  margin-bottom: 0;
}

.card p,
.card li {
  color: var(--on-surface-variant);
}

.card strong {
  color: var(--on-surface);
  font-weight: 500;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

th,
td {
  text-align: left;
  padding: 0.5rem 0;
  border-top: 1px solid var(--outline-variant);
  vertical-align: top;
  color: var(--on-surface-variant);
}

th {
  font-weight: 500;
  color: var(--on-surface);
}

tr:first-child th,
tr:first-child td {
  border-top: 0;
}

td code {
  white-space: normal;
  overflow-wrap: anywhere;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--outline-variant);
  padding: 2.5rem 0 3rem;
  color: var(--on-surface-variant);
  font-size: 0.9375rem;
}

footer .wrap {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 2rem;
}

footer nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

footer nav a {
  text-decoration: none;
}

@media (max-width: 640px) {
  footer .wrap {
    grid-template-columns: 1fr;
  }
}

/* ---------- prose pages (privacy) ---------- */

.prose {
  max-width: 42rem;
  padding: 3rem var(--gutter) 4rem;
  margin: 0 auto;
}

.prose h1 {
  font-size: 2.5rem;
}

.prose h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.prose .meta {
  margin: 0.5rem 0 2rem;
}

.prose p,
.prose li {
  color: var(--on-surface-variant);
}

.prose strong {
  color: var(--on-surface);
  font-weight: 500;
}

/* ---------- motion (§6) ---------- */

/* Enter: fade plus an 8 px upward drift, EmphasizedDecelerate. Only when JS can observe. */
.js .reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--t-medium) var(--ease-enter), transform var(--t-medium) var(--ease-enter);
}

.js .reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .specks span {
    animation: none;
    opacity: var(--o, 0.35);
    transform: none;
  }

  .btn,
  a {
    transition: none;
  }
}