spark-server/website/assets/styles.css

:root {
  --ink: #1a221c;
  --ink-soft: #3d4a40;
  --mist: #f3efe6;
  --paper: #faf7f0;
  --ember: #e35a1c;
  --ember-deep: #b84312;
  --leaf: #2f6b4f;
  --line: rgba(26, 34, 28, 0.12);
  --shadow: 0 28px 60px rgba(26, 34, 28, 0.14);
  --font-display: "Bricolage Grotesque", "Segoe UI", sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.55;
  background:
    radial-gradient(1200px 700px at 12% -10%, #ffe2c4 0%, transparent 55%),
    radial-gradient(900px 600px at 100% 8%, #cfe8d7 0%, transparent 50%),
    linear-gradient(180deg, #f7f2e8 0%, var(--mist) 45%, #e8efe8 100%);
  overflow-x: hidden;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.top {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 0;
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.mark-icon {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.4rem;
  object-fit: cover;
  display: block;
  box-shadow: 0 0 0 1px rgba(26, 34, 28, 0.08);
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.15rem 1.15rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
}

.top-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0.15rem 0.05rem;
  text-decoration: none;
  opacity: 0.78;
}

.top-nav a:hover,
.top-nav a[aria-current="page"] {
  opacity: 1;
}

.top-nav a[aria-current="page"] {
  color: var(--ember);
  box-shadow: inset 0 -2px 0 var(--ember);
}

.hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 2rem 3rem;
  max-width: 1120px;
  min-height: calc(100vh - 4.5rem);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3.5rem;
}

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

.eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--leaf);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  line-height: 0.95;
  letter-spacing: -0.045em;
}

.lede {
  margin: 1.25rem 0 0;
  max-width: 28rem;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--ink-soft);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.7rem 1.25rem;
  border-radius: 0.55rem;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ember);
  color: #fffaf4;
}

.btn-primary:hover {
  background: var(--ember-deep);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: rgba(26, 34, 28, 0.35);
}

.hero-stage {
  position: relative;
  min-height: 28rem;
  display: grid;
  place-items: center;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  animation: drift 9s ease-in-out infinite alternate;
}

.orb-a {
  width: 18rem;
  height: 18rem;
  background: radial-gradient(circle at 30% 30%, #ffb07a, #e35a1c66 55%, transparent 70%);
  top: 8%;
  right: 8%;
}

.orb-b {
  width: 14rem;
  height: 14rem;
  background: radial-gradient(circle at 40% 40%, #8fd0ad, #2f6b4f55 60%, transparent 72%);
  bottom: 10%;
  left: 4%;
  animation-delay: -3s;
}

.device {
  position: relative;
  width: min(100%, 18.5rem);
  aspect-ratio: 9 / 17.5;
  border-radius: 2rem;
  padding: 0.7rem;
  background: linear-gradient(160deg, #2a332c, #151a17);
  box-shadow: var(--shadow);
  transform: rotate(3deg);
  animation: floaty 6.5s ease-in-out infinite;
}

.device-bezel {
  height: 100%;
  border-radius: 1.45rem;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 30%),
    linear-gradient(180deg, #203028, #101512);
  padding: 1.4rem 0.95rem 1rem;
}

.chat {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  height: 100%;
}

.bubble {
  max-width: 88%;
  padding: 0.7rem 0.85rem;
  border-radius: 1rem;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.35;
}

.bubble.in {
  align-self: flex-start;
  background: #eef4ef;
  color: var(--ink);
  border-bottom-left-radius: 0.35rem;
}

.bubble.out {
  align-self: flex-end;
  background: var(--ember);
  color: #fff8f1;
  border-bottom-right-radius: 0.35rem;
}

.typing {
  align-self: flex-start;
  display: inline-flex;
  gap: 0.28rem;
  padding: 0.75rem 0.9rem;
  border-radius: 1rem;
  background: #eef4ef;
}

.typing span {
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: #6d7a70;
  animation: blink 1.2s infinite ease-in-out;
}

.typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing span:nth-child(3) {
  animation-delay: 0.3s;
}

.rise {
  opacity: 0;
  transform: translateY(12px);
  animation: rise-in 700ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: var(--d, 0s);
}

.features {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 1rem 1.5rem 5rem;
}

.features-intro {
  max-width: 36rem;
  margin-bottom: 2.5rem;
}

.features h2,
.download h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.features-intro p,
.download > p {
  margin: 0.9rem 0 0;
  color: var(--ink-soft);
  max-width: 34rem;
}

.feature-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.feature-rail li {
  padding: 1.6rem 1.4rem 0.4rem 0;
  border-bottom: 1px solid var(--line);
}

.feature-rail li + li {
  padding-left: 1.4rem;
  border-left: 1px solid var(--line);
}

.feature-rail h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.feature-rail p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.download {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto 2rem;
  padding: 3rem 1.5rem 4rem;
  border-top: 1px solid var(--line);
}

.notify {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.5rem;
  max-width: 32rem;
}

.notify input {
  flex: 1 1 14rem;
  min-height: 2.85rem;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(255, 255, 255, 0.55);
  color: var(--ink);
  font: inherit;
}

.notify input:focus {
  outline: 2px solid rgba(227, 90, 28, 0.35);
  outline-offset: 1px;
}

.notify .btn {
  border: none;
}

.notify-note {
  margin: 0.85rem 0 0;
  color: var(--leaf);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
}

.store-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.store-chip {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.15rem;
}

.foot {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem 2.5rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.foot p {
  margin: 0.35rem 0;
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
}

.foot a {
  text-decoration: none;
  opacity: 0.85;
}

.foot a:hover {
  opacity: 1;
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(-12px, 16px, 0) scale(1.05);
  }
}

@keyframes floaty {
  0%,
  100% {
    transform: rotate(3deg) translateY(0);
  }
  50% {
    transform: rotate(2deg) translateY(-10px);
  }
}

@keyframes rise-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blink {
  0%,
  80%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  40% {
    opacity: 1;
    transform: translateY(-2px);
  }
}

.page {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.page h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.page h2 {
  margin: 2.2rem 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.page .prose {
  max-width: 40rem;
  color: var(--ink-soft);
}

.page .prose p,
.page .prose li {
  margin: 0.75rem 0;
}

.page .prose ul {
  margin: 0.35rem 0 0;
  padding-inline-start: 1.2rem;
}

.page-back {
  display: inline-flex;
  margin-top: 1.75rem;
  font-family: var(--font-display);
  font-weight: 650;
  color: var(--ember);
  text-decoration: none;
}

.page .feature-rail {
  margin-top: 1.75rem;
}

@media (max-width: 720px) {
  .top-nav {
    flex: 1 1 100%;
    justify-content: flex-start;
    column-gap: 0.95rem;
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 1.75rem;
  }

  .hero-stage {
    order: -1;
    min-height: 22rem;
  }

  .device {
    width: min(100%, 15.5rem);
    transform: rotate(0deg);
  }

  .feature-rail {
    grid-template-columns: 1fr;
  }

  .feature-rail li + li {
    padding-left: 0;
    border-left: none;
  }
}

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

  .orb,
  .device,
  .typing span,
  .rise {
    animation: none !important;
  }

  .rise {
    opacity: 1;
    transform: none;
  }
}