:root {
  --yellow: #f5e000;
  --yellow-deep: #e6d000;
  --ink: #111111;
  --ink-soft: rgba(17, 17, 17, 0.72);
  --white: #ffffff;
  --font-display: "Syne", sans-serif;
  --font-body: "Figtree", sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --phone-w: min(280px, 72vw);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--yellow);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* Atmosphere — full-bleed brand field */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 80% at 85% 15%, rgba(255, 255, 255, 0.35) 0%, transparent 55%),
    radial-gradient(90% 70% at 10% 90%, rgba(0, 0, 0, 0.06) 0%, transparent 50%),
    linear-gradient(165deg, #ffe84a 0%, var(--yellow) 42%, var(--yellow-deep) 100%);
  animation: atmosphere-shift 14s var(--ease-out) infinite alternate;
}

@keyframes atmosphere-shift {
  from {
    filter: saturate(1);
    transform: scale(1);
  }
  to {
    filter: saturate(1.08);
    transform: scale(1.03);
  }
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 2.5rem);
  position: relative;
  z-index: 2;
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
}

.top-cta {
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.55rem 1rem;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out);
}

.top-cta:hover {
  background: var(--ink);
  color: var(--yellow);
}

/* Hero — one composition */
.hero {
  min-height: calc(100svh - 4.5rem);
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 3.5rem);
  padding: 0.5rem clamp(1.25rem, 4vw, 2.5rem) 3rem;
}

.hero-copy {
  text-align: center;
  max-width: 28rem;
  margin: 0 auto;
  animation: rise-in 0.9s var(--ease-out) both;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.logo {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(4.6rem, 18vw, 7.5rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
}

.tagline {
  margin: 0.65rem 0 0;
  font-size: clamp(1.15rem, 3.4vw, 1.45rem);
  font-weight: 500;
  font-style: italic;
  letter-spacing: -0.01em;
}

.lede {
  margin: 0.85rem 0 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.cta-row {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 0.75rem;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 1.35rem 0.9rem;
  min-width: 12.5rem;
  border-radius: 1.15rem;
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out), opacity 0.25s var(--ease-out);
}

.btn-primary {
  background: var(--ink);
  color: var(--white);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.22);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid rgba(17, 17, 17, 0.28);
  opacity: 0.55;
  cursor: not-allowed;
  user-select: none;
}

.platform-icon {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 1.85rem;
  height: 1.85rem;
}

.platform-icon svg {
  width: 1.85rem;
  height: 1.85rem;
  display: block;
}

.btn-secondary .platform-icon {
  color: var(--ink);
}

.btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
}

.btn-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.btn-meta {
  font-size: 0.75rem;
  font-weight: 500;
  opacity: 0.65;
}

/* Phone stage */
.hero-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 420px;
  animation: rise-in 1.05s 0.12s var(--ease-out) both;
}

.phone-glow {
  position: absolute;
  width: 70%;
  height: 55%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.55) 0%, transparent 70%);
  filter: blur(8px);
  pointer-events: none;
}

.phone {
  width: var(--phone-w);
  animation: phone-float 5.5s var(--ease-out) infinite alternate;
}

@keyframes phone-float {
  from {
    transform: translateY(0) rotate(-1.5deg);
  }
  to {
    transform: translateY(-14px) rotate(1.5deg);
  }
}

.phone-bezel {
  position: relative;
  border-radius: 2rem;
  padding: 0.45rem;
  background: linear-gradient(160deg, #2a2a2a, #0a0a0a);
  box-shadow:
    0 30px 60px rgba(0, 0, 0, 0.28),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.phone-notch {
  position: absolute;
  top: 0.7rem;
  left: 50%;
  transform: translateX(-50%);
  width: 28%;
  height: 0.7rem;
  background: #0a0a0a;
  border-radius: 999px;
  z-index: 2;
}

.screen {
  position: relative;
  aspect-ratio: 456 / 1024;
  border-radius: 1.65rem;
  overflow: hidden;
  background: var(--yellow);
}

.screen-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.04);
  transition:
    opacity 0.9s var(--ease-out),
    transform 1.2s var(--ease-out);
}

.screen-img.is-active {
  opacity: 1;
  transform: scale(1);
  z-index: 1;
}

/* Install steps — no cards */
.steps {
  padding: 0 clamp(1.25rem, 4vw, 2.5rem) 4.5rem;
  max-width: 42rem;
  margin: 0 auto;
}

.steps-title {
  margin: 0 0 1.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2rem);
  letter-spacing: -0.03em;
  text-align: center;
}

.steps-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.steps-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: baseline;
  padding-top: 1.15rem;
  border-top: 1.5px solid rgba(17, 17, 17, 0.14);
}

.step-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.step-text {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.45;
  color: var(--ink-soft);
}

.step-text strong {
  color: var(--ink);
  font-weight: 700;
}

.foot {
  padding: 1.5rem clamp(1.25rem, 4vw, 2.5rem) 2.25rem;
  text-align: center;
  border-top: 1.5px solid rgba(17, 17, 17, 0.12);
}

.foot p {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
}

.foot-note {
  margin-top: 0.35rem !important;
  font-weight: 500 !important;
  color: var(--ink-soft);
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2rem;
    padding-top: 1rem;
    padding-bottom: 2rem;
  }

  .hero-copy {
    text-align: left;
    margin: 0;
    padding-left: clamp(0.5rem, 2vw, 2rem);
  }

  .cta-row {
    justify-content: flex-start;
    align-items: flex-start;
  }

  .hero-stage {
    min-height: calc(100svh - 6rem);
  }

  .phone {
    width: min(300px, 32vw);
  }
}

@media (prefers-reduced-motion: reduce) {
  .atmosphere,
  .phone,
  .hero-copy,
  .hero-stage {
    animation: none !important;
  }

  .screen-img {
    transition: none;
  }
}