/* oa.gg — 서비스 허브. 빌드 없는 정적 사이트 */

:root {
  --bg: #080a12;
  --card-line: rgba(255, 255, 255, 0.09);
  --fg: #eef1f7;
  --fg-dim: #9aa3b8;
  --fg-faint: #6b7387;

  --slog: #7c8dff;
  --slog-2: #b18cff;
  --soccer: #35e08a;

  --radius: 20px;
  --maxw: 1000px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2 { line-height: 1.2; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--fg);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 0 0 12px 0;
  z-index: 100;
}
.skip:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--slog);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- background ---------- */

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(120% 80% at 50% -10%, #131a30 0%, var(--bg) 55%),
    var(--bg);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}
.orb-a {
  width: 620px; height: 620px;
  top: -240px; left: -140px;
  background: radial-gradient(circle, rgba(124, 141, 255, 0.55), transparent 68%);
}
.orb-b {
  width: 560px; height: 560px;
  top: 30%; right: -180px;
  background: radial-gradient(circle, rgba(53, 224, 138, 0.4), transparent 68%);
}
.orb-c {
  width: 700px; height: 700px;
  bottom: -340px; left: 26%;
  background: radial-gradient(circle, rgba(177, 140, 255, 0.3), transparent 68%);
}

.grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(90% 60% at 50% 20%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(90% 60% at 50% 20%, #000 0%, transparent 75%);
}

/* ---------- hero ---------- */

.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(96px, 18vw, 190px) 24px clamp(52px, 9vw, 96px);
  text-align: center;
}

.hero h1 {
  font-size: clamp(58px, 13vw, 118px);
  font-weight: 800;
  letter-spacing: -0.05em;
}

.grad {
  background: linear-gradient(100deg, var(--slog) 0%, var(--slog-2) 48%, var(--soccer) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sub {
  margin-top: 18px;
  color: var(--fg-dim);
  font-size: clamp(15px, 2vw, 17px);
  letter-spacing: -0.01em;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--fg);
  color: #0a0c14;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 10px 30px -12px rgba(238, 241, 247, 0.5);
  transition: transform 0.2s var(--ease);
}
.btn svg,
.maker svg {
  width: 15px; height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.2s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:hover svg { transform: translate(2px, -2px); }

/* ---------- service cards ---------- */

.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 34px 32px 32px;
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s;
}

.card::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.85;
}

.card::after {
  content: "";
  position: absolute;
  width: 340px; height: 340px;
  top: -180px; right: -120px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
  pointer-events: none;
  opacity: 0.55;
  transition: opacity 0.35s;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-line);
  box-shadow: 0 30px 60px -30px var(--accent-shadow);
}
.card:hover::after { opacity: 1; }

.card-slog {
  --accent: var(--slog);
  --accent-soft: rgba(124, 141, 255, 0.24);
  --accent-line: rgba(124, 141, 255, 0.45);
  --accent-shadow: rgba(124, 141, 255, 0.5);
}
.card-soccer {
  --accent: var(--soccer);
  --accent-soft: rgba(53, 224, 138, 0.2);
  --accent-line: rgba(53, 224, 138, 0.45);
  --accent-shadow: rgba(53, 224, 138, 0.45);
}

.card-head {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  display: grid;
  place-items: center;
  flex: none;
  width: 48px; height: 48px;
  border-radius: 14px;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
}
.logo svg {
  width: 24px; height: 24px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card h2 { font-size: 25px; font-weight: 700; }

.domain {
  color: var(--fg-faint);
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.tagline {
  margin-top: 24px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.desc {
  margin-top: 8px;
  color: var(--fg-dim);
  font-size: 15px;
}

.feats {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14.5px;
  color: var(--fg-dim);
}
.feats li { position: relative; padding-left: 24px; }
.feats li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.card-foot { margin-top: auto; padding-top: 30px; }

/* ---------- footer ---------- */

.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--maxw);
  margin: clamp(72px, 12vw, 120px) auto 0;
  padding: 24px 24px 44px;
  border-top: 1px solid var(--card-line);
  color: var(--fg-faint);
  font-size: 14px;
}

.maker a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--fg);
  font-weight: 600;
}
.maker a:hover { color: var(--soccer); }
.maker a:hover svg { transform: translate(2px, -2px); }

.copy { font-variant-numeric: tabular-nums; }

/* ---------- reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover { transform: none; }
  * { animation: none !important; }
}

/* ---------- responsive ---------- */

@media (max-width: 720px) {
  .hero, .services, .foot { padding-left: 18px; padding-right: 18px; }
  .card { padding: 28px 22px; }
  .foot { justify-content: center; text-align: center; }
}