hello-page/styles.css

:root {
  color-scheme: dark;
  --bg: #080a12;
  --bg-soft: #111827;
  --panel: rgba(15, 23, 42, 0.72);
  --panel-strong: rgba(15, 23, 42, 0.9);
  --text: #f8fafc;
  --muted: #aeb8c8;
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --accent-rgb: 139, 92, 246;
  --card-x: 50%;
  --card-y: 50%;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f7fb;
  --bg-soft: #ffffff;
  --panel: rgba(255, 255, 255, 0.76);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --text: #111827;
  --muted: #5f6b7a;
  --border: rgba(15, 23, 42, 0.12);
  --shadow: 0 24px 70px rgba(56, 65, 91, 0.18);
}

html[data-accent="cyan"] {
  --accent: #06b6d4;
  --accent-2: #3b82f6;
  --accent-rgb: 6, 182, 212;
}

html[data-accent="lime"] {
  --accent: #84cc16;
  --accent-2: #14b8a6;
  --accent-rgb: 132, 204, 22;
}

html[data-accent="rose"] {
  --accent: #f43f5e;
  --accent-2: #f97316;
  --accent-rgb: 244, 63, 94;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(var(--accent-rgb), 0.24), transparent 36rem),
    radial-gradient(circle at bottom right, rgba(34, 211, 238, 0.18), transparent 32rem),
    linear-gradient(135deg, var(--bg), var(--bg-soft));
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  transition: background 220ms ease, color 220ms ease;
}

button,
a {
  font: inherit;
}

a {
  color: inherit;
}

.ambient {
  position: fixed;
  z-index: -1;
  width: 28rem;
  height: 28rem;
  border-radius: 999px;
  filter: blur(18px);
  opacity: 0.42;
  pointer-events: none;
}

.ambient-one {
  top: -10rem;
  right: -7rem;
  background: rgba(var(--accent-rgb), 0.45);
}

.ambient-two {
  bottom: -12rem;
  left: -10rem;
  background: rgba(34, 211, 238, 0.32);
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
  gap: 28px;
  align-items: end;
  margin-bottom: 28px;
}

.hero-content,
.control-panel,
.service-card {
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.hero-content {
  min-height: 330px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(28px, 5vw, 56px);
  border-radius: 38px;
  position: relative;
  overflow: hidden;
}

.hero-content::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(var(--accent-rgb), 0.28), transparent 34%),
    url("data:image/svg+xml,%3Csvg width='140' height='140' viewBox='0 0 140 140' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='white' stroke-opacity='.09'%3E%3Cpath d='M0 70h140M70 0v140'/%3E%3Ccircle cx='70' cy='70' r='38'/%3E%3C/g%3E%3C/svg%3E");
  mask-image: linear-gradient(to bottom, black, transparent 88%);
  pointer-events: none;
}

.hero-content > * {
  position: relative;
}

.eyebrow,
.service-kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 14px 0 18px;
  font-size: clamp(2.8rem, 9vw, 6.8rem);
  line-height: 0.88;
  letter-spacing: -0.08em;
}

.lead {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.22rem);
  line-height: 1.7;
}

.control-panel {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: 28px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.control-group span {
  min-width: 68px;
  padding-left: 6px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.segmented,
.accent-swatch {
  border: 0;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.segmented {
  flex: 1;
  min-height: 34px;
  border-radius: 12px;
  background: transparent;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
}

.segmented:hover,
.accent-swatch:hover {
  transform: translateY(-1px);
}

.segmented.is-active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
}

.accent-group {
  justify-content: space-between;
}

.accent-swatch {
  width: 36px;
  height: 36px;
  border: 2px solid transparent;
  border-radius: 999px;
  box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.18);
}

.accent-swatch[data-accent="violet"] {
  background: linear-gradient(135deg, #8b5cf6, #22d3ee);
}

.accent-swatch[data-accent="cyan"] {
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
}

.accent-swatch[data-accent="lime"] {
  background: linear-gradient(135deg, #84cc16, #14b8a6);
}

.accent-swatch[data-accent="rose"] {
  background: linear-gradient(135deg, #f43f5e, #f97316);
}

.accent-swatch.is-active {
  border-color: var(--text);
  transform: scale(1.05);
}

.services {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  position: relative;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 24px;
  border-radius: 30px;
  text-decoration: none;
  overflow: hidden;
  transform-origin: center;
  transform: perspective(900px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y));
  will-change: transform;
  transition:
    transform 260ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 220ms ease,
    background 220ms ease,
    box-shadow 220ms ease;
}

.service-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    circle at var(--card-x) var(--card-y),
    rgba(var(--accent-rgb), 0.24),
    transparent 34%
  );
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.service-card.is-hovered,
.service-card:focus-visible {
  border-color: rgba(var(--accent-rgb), 0.52);
  background: var(--panel-strong);
  box-shadow: 0 28px 90px rgba(var(--accent-rgb), 0.18);
  outline: none;
}

.service-card[data-variant="about"] {
  background:
    linear-gradient(135deg, rgba(var(--accent-rgb), 0.2), transparent 58%),
    var(--panel);
}

.service-card.is-hovered::before,
.service-card:focus-visible::before {
  opacity: 1;
}

.service-card img {
  width: 72px;
  height: 72px;
  object-fit: contain;
  filter: drop-shadow(0 16px 28px rgba(0, 0, 0, 0.24));
}

.service-card h2 {
  margin: 7px 0 10px;
  font-size: 1.45rem;
  letter-spacing: -0.04em;
}

.service-card p:not(.service-kicker) {
  margin: 0;
  color: var(--muted);
  line-height: 1.62;
}

.arrow {
  position: absolute;
  right: 22px;
  bottom: 18px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(var(--accent-rgb), 0.14);
  color: var(--accent);
  font-size: 1.35rem;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.service-card.is-hovered .arrow,
.service-card:focus-visible .arrow {
  transform: translateX(4px);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
}

.shine {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    transparent 0%,
    rgba(255, 255, 255, 0.16) 42%,
    transparent 64%
  );
  transform: translateX(-130%);
  transition: transform 540ms ease;
  pointer-events: none;
}

.service-card.is-hovered .shine,
.service-card:focus-visible .shine {
  transform: translateX(130%);
}

.services.list-view {
  grid-template-columns: 1fr;
}

.services.list-view .service-card {
  min-height: 132px;
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) 52px;
  align-items: center;
  gap: 22px;
}

.services.list-view .arrow {
  position: static;
  justify-self: end;
}

.about-panel {
  margin-top: 18px;
  padding: clamp(26px, 5vw, 44px);
  border: 1px solid var(--border);
  border-radius: 32px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.about-panel h2 {
  margin: 10px 0 12px;
  font-size: clamp(2rem, 5vw, 4.3rem);
  line-height: 0.96;
  letter-spacing: -0.07em;
}

.about-panel p:not(.eyebrow) {
  max-width: 780px;
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

@media (max-width: 1040px) {
  .hero,
  .services {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-content {
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  .shell {
    width: min(100% - 22px, 1180px);
    padding: 22px 0;
  }

  .hero,
  .services {
    grid-template-columns: 1fr;
  }

  .hero-content {
    min-height: 300px;
    border-radius: 28px;
  }

  .control-panel {
    border-radius: 24px;
  }

  .control-group {
    flex-wrap: wrap;
  }

  .control-group span {
    width: 100%;
    min-width: 0;
  }

  .accent-group span {
    width: auto;
  }

  .services.list-view .service-card {
    grid-template-columns: 58px minmax(0, 1fr);
    min-height: 150px;
  }

  .services.list-view .arrow {
    position: absolute;
  }

  .service-card {
    min-height: 250px;
  }

  .service-card img {
    width: 62px;
    height: 62px;
  }
}

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