:root {
  color-scheme: dark;
  --ink: #f5f9f7;
  --muted: #d7e4df;
  --mint: #77f4ca;
  --mint-strong: #0cffad;
  --surface: rgba(7, 29, 29, 0.82);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: #061111;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: "Pretendard Variable", Pretendard, "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.landing {
  position: relative;
  isolation: isolate;
  display: grid;
  min-height: 100svh;
  overflow: hidden;
  background:
    radial-gradient(ellipse 62% 48% at 50% 81%, rgba(50, 190, 176, 0.28), transparent 72%),
    radial-gradient(ellipse 54% 42% at 50% 37%, rgba(24, 125, 112, 0.15), transparent 74%),
    linear-gradient(180deg, #061010 0%, #071616 49%, #092221 100%);
}

.landing::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  content: "";
  opacity: 0.54;
  background:
    radial-gradient(circle at 50% 39%, rgba(116, 255, 203, 0.24) 0 1px, transparent 2px),
    radial-gradient(circle at 50% 39%, rgba(72, 255, 188, 0.08), transparent 25%);
  pointer-events: none;
}

.circuit-pattern {
  position: absolute;
  z-index: -1;
  right: -8vw;
  bottom: -8vh;
  left: -8vw;
  height: min(40vw, 460px);
  opacity: 0.24;
  background-image:
    linear-gradient(45deg, transparent 47%, rgba(98, 230, 204, 0.5) 48% 49%, transparent 50%),
    linear-gradient(-45deg, transparent 47%, rgba(98, 230, 204, 0.35) 48% 49%, transparent 50%),
    repeating-linear-gradient(90deg, transparent 0 78px, rgba(98, 230, 204, 0.22) 79px 81px, transparent 82px 156px);
  background-size: 196px 196px, 196px 196px, 156px 156px;
  mask-image: linear-gradient(to top, #000 10%, rgba(0, 0, 0, 0.55) 62%, transparent 100%);
  pointer-events: none;
}

.landing-content {
  display: flex;
  width: min(100%, 1040px);
  min-height: 100svh;
  margin: 0 auto;
  padding: clamp(2.4rem, 5.2vw, 5.75rem) clamp(1.25rem, 5vw, 4.5rem) clamp(2.1rem, 4.5vw, 4.25rem);
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.brand {
  margin-bottom: clamp(1.75rem, 3.4vw, 3.15rem);
}

.brand img {
  display: block;
  width: clamp(15rem, 36vw, 30rem);
  height: auto;
  filter: drop-shadow(0 0 13px rgba(1, 255, 163, 0.26));
}

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

.shortcuts {
  display: grid;
  width: min(100%, 860px);
  gap: clamp(0.72rem, 1.7vw, 1.2rem);
}

.shortcut {
  position: relative;
  display: flex;
  min-height: clamp(4.9rem, 10vw, 7rem);
  padding: 0.8rem clamp(1.2rem, 3vw, 2.25rem) 0.8rem clamp(1.4rem, 3.4vw, 2.8rem);
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid rgba(104, 255, 198, 0.88);
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(30, 62, 60, 0.9), rgba(5, 22, 22, 0.94)),
    var(--surface);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.16), 0 0 0 1px rgba(77, 255, 187, 0.13), 0 0 24px rgba(24, 255, 171, 0.29), inset 0 0 20px rgba(26, 237, 160, 0.11);
  color: #fff;
  font-size: clamp(1.55rem, 3.6vw, 2.55rem);
  font-weight: 800;
  letter-spacing: -0.052em;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.shortcut::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0;
  background: linear-gradient(105deg, transparent 35%, rgba(170, 255, 220, 0.13) 50%, transparent 65%);
  transform: translateX(-78%);
  transition: opacity 180ms ease, transform 420ms ease;
}

.shortcut:hover,
.shortcut:focus-visible {
  border-color: #c4ffe5;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.25), 0 0 34px rgba(24, 255, 171, 0.48), inset 0 0 22px rgba(26, 237, 160, 0.18);
  outline: none;
  transform: translateY(-2px);
}

.shortcut:hover::before,
.shortcut:focus-visible::before {
  opacity: 1;
  transform: translateX(78%);
}

.shortcut span {
  position: relative;
  z-index: 1;
}

.shortcut svg {
  position: absolute;
  right: clamp(1.15rem, 2.8vw, 2rem);
  width: clamp(1.25rem, 2.8vw, 2rem);
  height: clamp(1.25rem, 2.8vw, 2rem);
  fill: none;
  stroke: #dcffed;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.35;
}

.introduction {
  width: min(100%, 930px);
  margin-top: clamp(2.4rem, 5vw, 4.4rem);
  text-align: center;
}

.introduction h2 {
  margin: 0;
  font-size: clamp(1.32rem, 2.65vw, 2.15rem);
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 1.32;
}

.introduction h2 strong {
  color: #fff;
  font-weight: 800;
}

.divider {
  display: grid;
  height: 1.6rem;
  margin: clamp(0.7rem, 1.45vw, 1.2rem) auto clamp(1.1rem, 2.1vw, 1.7rem);
  place-items: center;
}

.divider::before {
  width: 100%;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(84, 240, 191, 0.52) 15%, rgba(84, 240, 191, 0.82) 50%, rgba(84, 240, 191, 0.52) 85%, transparent);
}

.divider span {
  grid-area: 1 / 1;
  width: 0.58rem;
  height: 0.58rem;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 13px rgba(119, 244, 202, 0.82);
}

.introduction p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.04vw, 1.53rem);
  font-weight: 500;
  letter-spacing: -0.058em;
  line-height: 1.45;
}

.benefits {
  display: grid;
  width: min(100%, 960px);
  margin: clamp(2.1rem, 4.3vw, 3.7rem) 0 0;
  padding: 0;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
}

.benefits li {
  display: grid;
  min-width: 0;
  padding: 0 clamp(0.72rem, 2vw, 1.6rem);
  place-items: center;
  color: #f7fffb;
  font-size: clamp(0.96rem, 1.85vw, 1.45rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  text-align: center;
  white-space: nowrap;
}

.benefits li + li {
  border-left: 1px solid rgba(109, 250, 202, 0.45);
}

.dots {
  display: flex;
  margin-top: clamp(2.2rem, 4.6vw, 4rem);
  gap: clamp(0.55rem, 1vw, 0.85rem);
}

.dots i {
  display: block;
  width: clamp(0.42rem, 0.72vw, 0.58rem);
  height: clamp(0.42rem, 0.72vw, 0.58rem);
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 12px rgba(119, 244, 202, 0.56);
}

@media (max-width: 560px) {
  .landing-content {
    justify-content: flex-start;
    padding-top: clamp(2.9rem, 10vw, 4.5rem);
  }

  .brand {
    margin-bottom: clamp(1.8rem, 8vw, 2.8rem);
  }

  .brand img {
    width: clamp(15rem, 76vw, 25rem);
  }

  .shortcut {
    min-height: clamp(4.7rem, 20vw, 6.6rem);
    padding-inline: 0.85rem;
    font-size: clamp(1.42rem, 7.25vw, 2.2rem);
    letter-spacing: -0.075em;
  }

  .shortcut svg {
    display: none;
  }

  .introduction {
    margin-top: clamp(2.2rem, 10vw, 3.8rem);
  }

  .introduction h2 {
    font-size: clamp(1.08rem, 4.55vw, 1.75rem);
    line-height: 1.28;
    white-space: nowrap;
  }

  .introduction p {
    font-size: clamp(1.01rem, 4.65vw, 1.38rem);
    line-height: 1.5;
  }

  .introduction p br {
    display: none;
  }

  .benefits {
    margin-top: clamp(2.05rem, 9vw, 3.2rem);
    grid-template-columns: repeat(2, 1fr);
    border-top: 1px solid rgba(109, 250, 202, 0.35);
  }

  .benefits li {
    min-height: clamp(3.75rem, 15vw, 5.25rem);
    padding: clamp(0.85rem, 3vw, 1.3rem) 0.45rem;
    font-size: clamp(1.05rem, 5vw, 1.5rem);
  }

  .benefits li + li {
    border-left: 0;
  }

  .benefits li:nth-child(even) {
    border-left: 1px solid rgba(109, 250, 202, 0.45);
  }

  .benefits li:nth-child(n + 3) {
    border-top: 1px solid rgba(109, 250, 202, 0.35);
  }

  .dots {
    margin-top: clamp(1.9rem, 9vw, 3.2rem);
    padding-bottom: 0.25rem;
  }

  .circuit-pattern {
    right: -38vw;
    bottom: -4vh;
    left: -38vw;
    height: 72vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  .shortcut,
  .shortcut::before {
    transition: none;
  }
}