:root {
  --navy: #0b1f33;
  --deep: #12304a;
  --teal: #1aa6a0;
  --ice: #e8eef4;
  --mute: #4d5e70;
  --white: #ffffff;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "IBM Plex Sans", sans-serif;
  background: var(--ice);
  color: var(--navy);
  min-height: 100vh;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem clamp(1.25rem, 4vw, 3rem);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(11, 31, 51, 0.08);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.nav a {
  color: var(--navy);
  text-decoration: none;
}

.hero {
  position: relative;
  min-height: 78vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(11, 31, 51, 0.88) 0%, rgba(18, 48, 74, 0.72) 55%, rgba(26, 166, 160, 0.45) 100%),
    linear-gradient(160deg, #0b1f33, #1a4a5c 50%, #0d3a4a);
  animation: wash 12s ease-in-out infinite alternate;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, black 40%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 3.5rem clamp(1.25rem, 4vw, 3rem);
  max-width: 760px;
  color: var(--white);
  animation: rise 0.9s ease both;
}

.brand {
  font-family: "IBM Plex Serif", serif;
  font-weight: 600;
  font-size: clamp(3.2rem, 11vw, 6.5rem);
  line-height: 0.9;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-family: "IBM Plex Serif", serif;
  font-weight: 500;
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  line-height: 1.2;
  max-width: 16ch;
  margin-bottom: 0.9rem;
}

.sub {
  font-size: 1.05rem;
  line-height: 1.55;
  max-width: 38ch;
  opacity: 0.85;
  margin-bottom: 2rem;
}

.ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.9rem 1.25rem;
  border-radius: 6px;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.primary {
  background: var(--teal);
  color: var(--navy);
}

.primary:hover {
  transform: translateY(-2px);
  background: #2bc4bd;
}

.ghost {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.platform {
  padding: 4rem clamp(1.25rem, 4vw, 3rem) 5rem;
  max-width: 860px;
}

.platform h2 {
  font-family: "IBM Plex Serif", serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 0.75rem;
}

.lead {
  color: var(--mute);
  font-size: 1.05rem;
  line-height: 1.55;
  max-width: 42ch;
  margin-bottom: 2.5rem;
}

.list {
  list-style: none;
  display: grid;
  gap: 0;
}

.list li {
  display: grid;
  gap: 0.35rem;
  padding: 1.4rem 0;
  border-top: 1px solid rgba(11, 31, 51, 0.12);
  animation: rise 0.7s ease both;
}

.list li:last-child {
  border-bottom: 1px solid rgba(11, 31, 51, 0.12);
}

.list li:nth-child(1) { animation-delay: 0.1s; }
.list li:nth-child(2) { animation-delay: 0.2s; }
.list li:nth-child(3) { animation-delay: 0.3s; }

.list strong {
  font-size: 1.1rem;
}

.list span {
  color: var(--mute);
  line-height: 1.45;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes wash {
  from { filter: saturate(1); }
  to { filter: saturate(1.15) brightness(1.05); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}