/* ═══════════════ gemgem.IP Landing — Design Tokens ═══════════════ */
:root {
  --bg: #0a0a12;
  --bg-alt: #0e0e1a;
  --card: #161626;
  --card-border: #ffffff14;
  --text: #eceaf4;
  --text-dim: #a49fb8;
  --text-faint: #6f6a84;
  --accent: #8d3cff;
  --accent-soft: #8d3cff2b;
  --accent-text: #b98cff;
  --grad-from: #8fc8f4;
  --grad-to: #8d3cff;
  --ok: #34d399;
  --radius: 14px;
  --radius-lg: 20px;
  --container: 1120px;
  --nav-h: 64px;
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", "Apple SD Gothic Neo", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ═══════════════ Reveal animation ═══════════════ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .bar { transition: none !important; }
}

/* ═══════════════ Buttons ═══════════════ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: 10px;
  font-size: 15px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.4;
  border: none; cursor: pointer; white-space: nowrap;
  transition: background .15s ease, color .15s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #9b55ff; }
.btn-ghost {
  background: transparent; color: var(--text);
  box-shadow: inset 0 0 0 1px #ffffff2b;
}
.btn-ghost:hover { background: #ffffff0d; }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-full { width: 100%; }

/* ═══════════════ Nav ═══════════════ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: #0a0a12cc; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid #ffffff0d;
}
.nav-inner {
  max-width: var(--container); margin: 0 auto; padding: 0 24px;
  height: var(--nav-h); display: flex; align-items: center; gap: 32px;
}
.logo { display: inline-flex; align-items: center; font-size: 19px; font-weight: 800; letter-spacing: -0.02em; }
.logo-dot { color: var(--accent-text); }
.nav-links { display: flex; gap: 26px; margin-left: auto; }
.nav-links a { font-size: 14px; font-weight: 600; color: var(--text-dim); transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 12px; }

/* ═══════════════ Hero ═══════════════ */
.hero { position: relative; padding: calc(var(--nav-h) + 100px) 0 110px; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(52% 42% at 78% 24%, #8d3cff2b 0%, transparent 100%),
    radial-gradient(40% 34% at 14% 10%, #8fc8f41a 0%, transparent 100%),
    radial-gradient(60% 50% at 50% 110%, #8d3cff17 0%, transparent 100%);
}
.hero-grid {
  position: relative; display: grid; grid-template-columns: 1fr;
  gap: 64px;
}
.hero-copy { max-width: 760px; }
.hero-title {
  font-size: clamp(52px, 7vw, 88px); font-weight: 800; line-height: 1.02;
  letter-spacing: -0.04em; margin-bottom: 18px;
}
.grad-text {
  background: linear-gradient(100deg, var(--grad-from), var(--grad-to));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-tagline {
  font-size: clamp(22px, 2.6vw, 30px); font-weight: 700; line-height: 1.25;
  letter-spacing: -0.025em; margin-bottom: 16px;
}
.hero-sub {
  font-size: clamp(16px, 1.7vw, 19px); color: var(--text-dim);
  margin-bottom: 36px; line-height: 1.55; max-width: 520px;
}
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-media { min-width: 0; }
.hero-video {
  width: 100%; aspect-ratio: 16/9; object-fit: cover;
  border-radius: 24px; border: 1px solid #ffffff1f;
  box-shadow: 0 40px 100px #00000099, 0 0 0 1px #8d3cff14, 0 0 80px #8d3cff1f;
  background: #0c0c16;
}

/* ═══════════════ Metrics ═══════════════ */
.metrics { border-block: 1px solid #ffffff0d; background: var(--bg-alt); position: relative; }
.metrics-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  padding-block: 52px;
}
.metric { text-align: center; }
.metric-num {
  font-size: clamp(38px, 4.4vw, 54px); font-weight: 800; letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums; line-height: 1.1;
  background: linear-gradient(110deg, var(--grad-from), var(--grad-to));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.metric-unit { font-size: 0.55em; font-weight: 800; margin-left: 2px; }
.metric-label { margin-top: 10px; font-size: 14px; color: var(--text-dim); line-height: 1.55; }

/* ═══════════════ Sections ═══════════════ */
.section { padding: 130px 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid #ffffff0d; }
.section-eyebrow {
  font-size: 13px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent-text); margin-bottom: 18px;
}
.section-title {
  font-size: clamp(32px, 4.2vw, 52px); font-weight: 700; line-height: 1.14;
  letter-spacing: -0.03em; margin-bottom: 20px;
}
.section-sub { font-size: clamp(16px, 1.7vw, 19px); color: var(--text-dim); max-width: 640px; margin-bottom: 56px; line-height: 1.6; }

/* ═══════════════ How it works ═══════════════ */
.layers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.layer-card {
  border-top: 1px solid #ffffff1f; padding-top: 28px;
  display: flex; flex-direction: column; gap: 10px;
}
.layer-num {
  font-size: 13px; font-weight: 800; color: var(--accent-text);
  font-variant-numeric: tabular-nums; letter-spacing: 0.08em;
}
.layer-card h3 { font-size: 24px; font-weight: 700; letter-spacing: -0.015em; }
.layer-card p { font-size: 15px; color: var(--text-dim); }

/* ═══════════════ Features ═══════════════ */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-bottom: 72px; }
.feature { border-top: 1px solid #ffffff1f; padding-top: 28px; }
.feature-num {
  width: 34px; height: 34px; border-radius: 999px; margin-bottom: 16px;
  background: linear-gradient(135deg, var(--grad-from), var(--grad-to));
  color: #0b0716; font-size: 15px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 18px #8d3cff4d;
}
.feature h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.015em; }
.feature p { font-size: 15px; color: var(--text-dim); }

.video-block { margin: 0; }
.block-video {
  width: 100%; aspect-ratio: 16/9; object-fit: cover;
  border-radius: var(--radius-lg); border: 1px solid #ffffff14;
  box-shadow: 0 24px 60px #00000059;
  background: #0c0c16;
}
.video-caption { margin-top: 16px; font-size: 14px; color: var(--text-faint); text-align: center; }

/* ═══════════════ Proof ═══════════════ */
.proof-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: center; }
.proof-chart {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius-lg); padding: 36px 32px 26px;
}
.bar-group { display: flex; align-items: flex-end; justify-content: center; gap: 56px; height: 240px; }
.bar-wrap { display: flex; flex-direction: column; align-items: center; gap: 12px; height: 100%; justify-content: flex-end; }
.bar {
  width: 84px; border-radius: 10px 10px 4px 4px; position: relative;
  height: 0; transition: height 1.1s cubic-bezier(.25,.8,.3,1);
}
.proof-chart.visible .bar { height: calc(var(--h) - 34px); }
.bar-before { background: #ffffff1f; }
.bar-after {
  background: linear-gradient(180deg, var(--grad-from), var(--grad-to));
  box-shadow: 0 0 34px #8d3cff4d;
}
.bar-value {
  position: absolute; top: -30px; left: 50%; transform: translateX(-50%);
  font-size: 17px; font-weight: 800; font-variant-numeric: tabular-nums;
}
.bar-label { font-size: 13px; color: var(--text-dim); font-weight: 600; white-space: nowrap; }
.chart-caption { text-align: center; font-size: 12.5px; color: var(--text-faint); margin-top: 18px; }
.proof-quote {
  font-size: clamp(19px, 2.2vw, 24px); font-weight: 700; line-height: 1.5;
  letter-spacing: -0.015em; margin-bottom: 20px;
  padding-left: 20px; border-left: 3px solid var(--accent);
}
.proof-copy p { font-size: 15.5px; color: var(--text-dim); }

/* ═══════════════ Enterprise ═══════════════ */
.ent-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.ent-card { border-top: 1px solid #ffffff1f; padding-top: 28px; }
.ent-icon { width: 28px; height: 28px; color: var(--accent-text); margin-bottom: 16px; }
.ent-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.ent-card p { font-size: 14.5px; color: var(--text-dim); }

/* ═══════════════ CTA ═══════════════ */
.cta-section { position: relative; padding: 130px 0; overflow: hidden; }
.cta-bg {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(56% 60% at 24% 40%, #8d3cff26 0%, transparent 100%),
    radial-gradient(40% 44% at 80% 80%, #8fc8f414 0%, transparent 100%);
}
.cta-grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.cta-copy h2 { font-size: clamp(30px, 3.8vw, 46px); font-weight: 700; line-height: 1.16; letter-spacing: -0.03em; margin-bottom: 18px; }
.cta-copy > p { font-size: 16px; color: var(--text-dim); margin-bottom: 26px; max-width: 460px; }
.cta-points { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.cta-points li {
  position: relative; padding-left: 30px; font-size: 15px; color: var(--text-dim);
}
.cta-points li::before {
  content: ""; position: absolute; left: 0; top: 3px;
  width: 18px; height: 18px; border-radius: 6px;
  background: var(--accent-soft); border: 1px solid #8d3cff4d;
}
.cta-points li::after {
  content: ""; position: absolute; left: 6px; top: 7px;
  width: 5px; height: 8px;
  border: solid var(--accent-text); border-width: 0 1.8px 1.8px 0; transform: rotate(45deg);
}
.cta-form {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius-lg); padding: 34px;
  display: flex; flex-direction: column; gap: 18px;
  box-shadow: 0 24px 60px #00000059;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cta-form label { display: flex; flex-direction: column; gap: 7px; font-size: 13.5px; font-weight: 700; color: var(--text-dim); }
.cta-form input, .cta-form select, .cta-form textarea {
  font-family: var(--font); font-size: 14.5px; color: var(--text);
  background: #0c0c16; border: 1px solid #ffffff1f; border-radius: 9px;
  padding: 12px 14px; outline: none; transition: border-color .15s, box-shadow .15s;
  resize: vertical;
}
.cta-form input:focus, .cta-form select:focus, .cta-form textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px #8d3cff2b;
}
.cta-form select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-dim) 50%), linear-gradient(135deg, var(--text-dim) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.form-status { font-size: 13.5px; min-height: 1.2em; }
.form-status.ok { color: var(--ok); }
.form-status.err { color: #f4718c; }

/* ═══════════════ Footer ═══════════════ */
.footer { border-top: 1px solid #ffffff0d; background: var(--bg-alt); }
.footer-inner {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px;
  padding-block: 64px 56px;
}
.footer-logo { font-size: 22px; }
.footer-by { margin-top: 10px; font-size: 13.5px; color: var(--text-faint); }
.footer-col { display: flex; flex-direction: column; gap: 11px; }
.footer-col-title {
  font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 6px;
}
.footer-col a { font-size: 14.5px; color: var(--text-dim); transition: color .15s; width: fit-content; }
.footer-col a:hover { color: var(--text); }
.footer-legal { padding-block: 20px 28px; border-top: 1px solid #ffffff0a; }
.footer-legal p { font-size: 12.5px; color: var(--text-faint); }
@media (max-width: 700px) {
  .footer-inner { grid-template-columns: 1fr; gap: 36px; padding-block: 48px 40px; }
}

/* ═══════════════ Responsive ═══════════════ */
@media (max-width: 960px) {
  .hero-grid { gap: 44px; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 20px; }
  .layers, .feature-list { grid-template-columns: 1fr; gap: 28px; }
  .ent-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .proof-grid, .cta-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-meta { text-align: left; }
  .nav-links { display: none; }
}
@media (max-width: 560px) {
  .section { padding: 80px 0; }
  .ent-grid, .form-row { grid-template-columns: 1fr; }
  .bar-group { gap: 32px; }
}