:root {
  color-scheme: dark;
  --bg: #07070d;
  --panel: rgba(17, 21, 32, 0.88);
  --panel-strong: #121622;
  --ink: #f7fbff;
  --text: #eef5ff;
  --muted: #b7c3d4;
  --line: rgba(255, 255, 255, 0.14);
  --primary: #31d7c7;
  --primary-dark: #0aa99b;
  --accent: #ffb84d;
  --coral: #ff6b4a;
  --shadow: rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(130deg, rgba(49, 215, 199, 0.08), transparent 34%),
    linear-gradient(290deg, rgba(255, 184, 77, 0.1), transparent 40%),
    var(--bg);
  color: var(--text);
  font-family: Arial, "Noto Sans KR", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.88) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(49, 215, 199, 0.55) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(255, 184, 77, 0.56) 0 1px, transparent 1.4px);
  background-position: 12px 10px, 72px 84px, 130px 42px;
  background-size: 150px 150px, 210px 210px, 270px 270px;
  opacity: 0.5;
}

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

button,
a {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
  padding: 14px clamp(20px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(7, 7, 13, 0.84);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 900;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  box-shadow: 0 0 28px rgba(49, 215, 199, 0.34);
}

.header-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-weight: 900;
}

.header-link:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.download-layout {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 0.72fr);
  grid-template-areas:
    "intro preview"
    "platforms preview";
  align-items: center;
  gap: 28px clamp(28px, 6vw, 72px);
  min-height: calc(100vh - 72px);
  padding: clamp(40px, 7vw, 88px) clamp(20px, 6vw, 72px);
  overflow: hidden;
}

.space-field {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(150deg, rgba(255, 107, 74, 0.17), transparent 32%),
    linear-gradient(20deg, transparent 0 48%, rgba(49, 215, 199, 0.14) 49% 51%, transparent 52%),
    linear-gradient(180deg, rgba(12, 16, 23, 0), rgba(7, 7, 13, 0.98));
}

.intro {
  grid-area: intro;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
}

.intro h1 {
  max-width: 680px;
  margin: 0;
  color: var(--ink);
  font-size: 66px;
  line-height: 1.06;
  letter-spacing: 0;
}

.intro p {
  max-width: 590px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}

.platforms {
  grid-area: platforms;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.platform-button {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 86px;
  width: 100%;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
}

.platform-button:hover {
  border-color: rgba(49, 215, 199, 0.5);
  background: rgba(49, 215, 199, 0.1);
}

.platform-button.web {
  border-color: transparent;
  background: var(--primary);
  color: #031312;
}

.platform-button.web:hover {
  background: #6ff7ea;
}

.platform-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: rgba(49, 215, 199, 0.14);
  color: var(--primary);
  font-size: 18px;
  font-weight: 900;
}

.web .platform-icon {
  background: rgba(3, 19, 18, 0.18);
  color: #031312;
  font-size: 13px;
}

.platform-button strong,
.platform-button small {
  display: block;
}

.platform-button strong {
  font-size: 19px;
}

.platform-button small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.web small {
  color: rgba(3, 19, 18, 0.72);
}

.preview {
  grid-area: preview;
  display: flex;
  justify-content: center;
}

.phone {
  width: min(330px, 100%);
  min-height: 650px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 32px;
  background: #090c13;
  box-shadow: 0 30px 90px var(--shadow), 0 0 34px rgba(49, 215, 199, 0.16);
}

.phone-status {
  min-height: 30px;
  padding: 8px 18px 5px;
  background: #05060a;
  color: var(--primary);
  font-size: 11px;
  font-weight: 900;
}

.phone-title {
  padding: 18px;
  background: var(--primary);
  color: #031312;
  font-size: 18px;
  font-weight: 900;
}

.scan-panel {
  margin: 18px;
  min-height: 260px;
  padding: 24px;
  border: 1px solid rgba(255, 184, 77, 0.28);
  border-radius: 8px;
  background:
    linear-gradient(120deg, rgba(255, 184, 77, 0.12), transparent 42%),
    var(--panel-strong);
  color: var(--ink);
}

.scan-line {
  display: block;
  width: 100%;
  height: 96px;
  margin-bottom: 28px;
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background:
    linear-gradient(90deg, transparent 0 16%, rgba(49, 215, 199, 0.78) 16% 18%, transparent 18% 100%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.1) 0 8px, transparent 8px 16px);
}

.scan-panel strong {
  display: block;
  font-size: 26px;
  line-height: 1.22;
}

.scan-panel p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.mini-chart {
  display: flex;
  align-items: flex-end;
  gap: 9px;
  height: 150px;
  margin: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.mini-chart span {
  flex: 1;
  border-radius: 5px 5px 0 0;
  background: linear-gradient(180deg, var(--accent), var(--coral));
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 30;
  min-width: 220px;
  padding: 13px 18px;
  border: 1px solid rgba(49, 215, 199, 0.32);
  border-radius: 8px;
  background: #05060a;
  color: var(--ink);
  text-align: center;
  font-weight: 900;
  box-shadow: 0 12px 34px var(--shadow);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(20px, 6vw, 72px);
  border-top: 1px solid rgba(49, 215, 199, 0.34);
  background: #05060a;
  color: var(--ink);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.footer-brand span {
  color: var(--muted);
  font-size: 12px;
}

.footer-navigation,
.footer-links {
  display: flex;
  align-items: center;
}

.footer-navigation {
  gap: 18px;
}

.footer-navigation p {
  margin: 0;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
}

.footer-links {
  flex-wrap: wrap;
  gap: 10px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 900;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.footer-links a:hover {
  border-color: var(--primary);
  background: rgba(49, 215, 199, 0.12);
  color: var(--primary);
}

@media (max-width: 940px) {
  .download-layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "intro"
      "platforms"
      "preview";
  }

  .preview {
    justify-content: flex-start;
  }

  .site-footer,
  .footer-navigation {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 720px) {
  .intro h1 {
    font-size: 44px;
  }
}

@media (max-width: 620px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .download-layout {
    padding-top: 36px;
  }

  .intro h1 {
    font-size: 38px;
  }

  .intro p {
    font-size: 16px;
  }

  .platforms {
    grid-template-columns: 1fr;
  }

  .phone {
    min-height: 560px;
  }
}