/* ₿lyp marketing — green brand, Coin Standard, Ark self-custody */

:root {
  --green-950: #0a1f14;
  --green-900: #0f2e1c;
  --green-800: #164a2c;
  --green-700: #1e7a43;
  --green-600: #2e9e5b;
  --green-500: #3cb371;
  --green-400: #7bdfa0;
  --green-200: #a5d9b8;
  --green-100: #d7e8d9;
  --green-50: #eef6f0;
  --ink: #121a15;
  --ink-soft: #3d4a41;
  --paper: #f4faf5;
  --paper-2: #e8f3eb;
  --white: #ffffff;
  --radius: 18px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.55;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(123, 223, 160, 0.35), transparent 55%),
    radial-gradient(900px 500px at -10% 20%, rgba(46, 158, 91, 0.18), transparent 50%),
    linear-gradient(180deg, var(--paper) 0%, var(--green-50) 40%, var(--paper) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--green-700);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--green-800);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--green-700);
  color: var(--white);
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.9rem clamp(1.25rem, 4vw, 3rem);
  background: rgba(244, 250, 245, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 122, 67, 0.08);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.55rem;
  letter-spacing: -0.03em;
  line-height: 1;
}

.brand-mark {
  color: var(--green-700);
  font-size: 1.15em;
}

.brand:hover {
  color: var(--ink);
}

.brand:hover .brand-mark {
  color: var(--green-600);
}

.nav {
  display: none;
  gap: 1.5rem;
  margin-left: auto;
  margin-right: 0.5rem;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--green-700);
}

@media (min-width: 760px) {
  .nav {
    display: flex;
  }
}

.site-header .btn-sm {
  margin-left: auto;
}

@media (min-width: 760px) {
  .site-header .btn-sm {
    margin-left: 0;
  }
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.35rem;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--green-700);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 180ms var(--ease), transform 180ms var(--ease), color 180ms var(--ease);
}

.btn:hover {
  background: var(--green-800);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.55rem 0.95rem;
  font-size: 0.9rem;
}

.btn-ghost {
  background: transparent;
  color: var(--green-800);
  border-color: rgba(30, 122, 67, 0.28);
}

.btn-ghost:hover {
  background: rgba(30, 122, 67, 0.08);
  color: var(--green-900);
}

/* Hero */

.hero {
  display: grid;
  gap: 2.5rem;
  align-items: end;
  min-height: min(92vh, 920px);
  padding: clamp(2rem, 6vw, 4.5rem) clamp(1.25rem, 4vw, 3rem) 3rem;
  max-width: 1180px;
  margin: 0 auto;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 3rem;
  }
}

.hero-brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 14vw, 8.5rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 0.9;
  color: var(--ink);
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.05s forwards;
}

.hero-brand .brand-mark {
  color: var(--green-700);
  font-size: 1em;
}

.hero-line {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  font-weight: 560;
  letter-spacing: -0.03em;
  line-height: 1.15;
  max-width: 16ch;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.18s forwards;
}

.hero-support {
  margin: 0 0 1.6rem;
  max-width: 34rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.3s forwards;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.42s forwards;
}

.hero-visual {
  display: flex;
  justify-content: center;
  opacity: 0;
  animation: rise 1s var(--ease) 0.35s forwards, float 7s ease-in-out 1.4s infinite;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Phone mock */

.phone {
  width: min(100%, 300px);
  border-radius: 36px;
  padding: 10px;
  background: linear-gradient(160deg, var(--green-900), var(--green-700));
  box-shadow: 0 28px 60px rgba(15, 46, 28, 0.28);
}

.phone-screen {
  border-radius: 28px;
  overflow: hidden;
  background: var(--white);
  min-height: 520px;
  display: flex;
  flex-direction: column;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--green-100);
}

.chat-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-400), var(--green-700));
}

.chat-name {
  font-weight: 650;
  font-size: 0.95rem;
}

.chat-thread {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1rem;
  background:
    radial-gradient(circle at 20% 10%, rgba(165, 217, 184, 0.35), transparent 40%),
    var(--paper);
}

.bubble {
  max-width: 86%;
  padding: 0.7rem 0.9rem;
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.35;
}

.bubble.in {
  align-self: flex-start;
  background: var(--white);
  color: var(--ink);
}

.bubble.out {
  align-self: flex-end;
  background: var(--green-700);
  color: var(--white);
}

.bubble.pay {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 8.5rem;
}

.pay-label {
  font-size: 0.72rem;
  opacity: 0.85;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pay-amount {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.chat-compose {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 0.85rem;
  border-top: 1px solid var(--green-100);
  background: var(--white);
}

.compose-field {
  flex: 1;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  background: var(--green-50);
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.compose-pay {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--green-700);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}

/* Sections */

.section {
  padding: clamp(3.5rem, 8vw, 6.5rem) clamp(1.25rem, 4vw, 3rem);
}

.section-inner {
  max-width: 980px;
  margin: 0 auto;
}

.section h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.08;
  max-width: 16ch;
}

.lede {
  margin: 0 0 2rem;
  max-width: 38rem;
  color: var(--ink-soft);
  font-size: 1.12rem;
}

/* Problem */

.problem {
  background: linear-gradient(180deg, transparent, rgba(15, 46, 28, 0.04), transparent);
}

.problem-scene {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 760px) {
  .problem-scene {
    grid-template-columns: 1.4fr 0.8fr;
    align-items: end;
  }
}

.problem-panel {
  padding: 1.4rem 1.5rem;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid rgba(30, 122, 67, 0.12);
}

.problem-label {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green-700);
}

.problem-fake,
.problem-reply {
  margin: 0 0 0.65rem;
  color: var(--ink-soft);
}

.problem-invoice {
  margin: 0 0 0.85rem;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  background: var(--green-50);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  word-break: break-all;
  color: var(--ink-soft);
}

.problem-aside {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 560;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--green-800);
  max-width: 14ch;
}

/* Solution pillars */

.pillars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 760px) {
  .pillars {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillars li {
  padding: 1.25rem 1.3rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(30, 122, 67, 0.12);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.pillars strong {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.pillars span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Everyday examples */

.examples {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

@media (min-width: 700px) {
  .examples {
    grid-template-columns: 1fr 1fr;
  }
}

.examples li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "kind kind amount"
    "title title amount"
    "note note amount";
  gap: 0.15rem 1rem;
  align-items: center;
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid rgba(30, 122, 67, 0.1);
}

.ex-kind {
  grid-area: kind;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--green-600);
}

.ex-title {
  grid-area: title;
  font-weight: 650;
}

.ex-note {
  grid-area: note;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.ex-amount {
  grid-area: amount;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--green-800);
  white-space: nowrap;
}

/* Network */

.network {
  background:
    linear-gradient(135deg, rgba(30, 122, 67, 0.92), rgba(15, 46, 28, 0.96)),
    var(--green-900);
  color: var(--white);
}

.network h2,
.network .lede {
  color: var(--white);
}

.network .lede {
  opacity: 0.88;
  max-width: 36rem;
}

/* Values */

.value-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .value-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 980px) {
  .value-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.value-grid li {
  padding: 1.3rem 1.35rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(30, 122, 67, 0.1);
}

.value-grid h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.value-grid p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.96rem;
}

/* Closing */

.closing {
  text-align: center;
}

.closing .section-inner {
  max-width: 720px;
}

.closing-brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--ink);
}

.closing-brand .brand-mark {
  color: var(--green-700);
  font-size: 1em;
}

.closing h2 {
  max-width: none;
  margin-left: auto;
  margin-right: auto;
}

.closing .lede {
  margin-left: auto;
  margin-right: auto;
}

.closing .hero-cta {
  justify-content: center;
  margin-bottom: 1.25rem;
}

.fine {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.fine a {
  color: inherit;
}

/* Footer */

.site-footer {
  padding: 2.5rem clamp(1.25rem, 4vw, 3rem) 3rem;
  border-top: 1px solid rgba(30, 122, 67, 0.1);
  text-align: center;
}

.brand-footer {
  margin-bottom: 0.5rem;
}

.site-footer > p {
  margin: 0.25rem 0;
  color: var(--ink-soft);
}

.site-footer .fine {
  margin-top: 0.85rem;
}

/* Reveal on scroll */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .hero-brand,
  .hero-line,
  .hero-support,
  .hero-cta,
  .hero-visual,
  .reveal {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}