:root {
  color: #173247;
  background: #eef7ff;
  font-family: "Noto Sans JP", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { min-width: 320px; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 8% 18%, rgba(156, 220, 246, 0.36), transparent 27rem),
    radial-gradient(circle at 90% 0%, rgba(181, 242, 229, 0.45), transparent 30rem),
    linear-gradient(150deg, #f8fcff 0%, #eaf5ff 56%, #f2fbf9 100%);
}

.showcase-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  padding: 14px clamp(20px, 4vw, 64px);
  border-bottom: 1px solid rgba(81, 137, 172, 0.18);
  background: rgba(248, 252, 255, 0.72);
  backdrop-filter: blur(18px);
}

.showcase-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: inherit;
  text-decoration: none;
  font-family: "DM Sans", sans-serif;
  font-size: 1.14rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.showcase-brand img { width: 46px; height: 46px; object-fit: contain; }

.showcase-header > p {
  margin: 0;
  color: #63829a;
  font-family: "DM Sans", sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.showcase-main {
  width: min(1520px, 100%);
  margin: 0 auto;
  padding: clamp(42px, 6vw, 88px) clamp(16px, 4vw, 64px) 72px;
}

.showcase-heading { margin-bottom: clamp(32px, 5vw, 64px); }
.showcase-heading p {
  margin: 0 0 12px;
  color: #5384a4;
  font-family: "DM Sans", sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.showcase-heading h1 {
  margin: 0;
  color: #16364d;
  font-family: "Shippori Mincho", serif;
  font-size: clamp(2.2rem, 5vw, 4.7rem);
  font-weight: 500;
  line-height: 1.23;
  letter-spacing: 0.015em;
}

.concept-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(24px, 3vw, 42px); }

.concept-card {
  position: relative;
  overflow: hidden;
  padding: clamp(16px, 2vw, 26px);
  border: 1px solid var(--card-border);
  border-radius: 28px;
  background: var(--card-bg);
  box-shadow: 0 30px 90px rgba(37, 102, 139, 0.14);
}

.concept-card::before {
  position: absolute;
  top: -100px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: var(--orb);
  filter: blur(1px);
  content: "";
}

.concept-guild { --card-bg: rgba(246, 251, 255, 0.9); --card-border: rgba(101, 163, 203, 0.27); --orb: rgba(169, 215, 246, 0.42); --link: #367eae; }
.concept-ripple { --card-bg: rgba(246, 255, 252, 0.88); --card-border: rgba(67, 158, 156, 0.25); --orb: rgba(127, 224, 203, 0.34); --link: #277d7f; }

.concept-card > header { position: relative; display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.concept-card > header > div { display: flex; align-items: baseline; gap: 12px; }
.concept-card > header span { color: var(--link); font-family: "DM Sans", sans-serif; font-size: 0.75rem; font-weight: 700; }
.concept-card h2 { margin: 0; font-family: "DM Sans", sans-serif; font-size: clamp(1.55rem, 2.4vw, 2.35rem); letter-spacing: -0.045em; }
.concept-card header p { margin: 0; color: #718a9c; font-family: "DM Sans", sans-serif; font-size: 0.6rem; font-weight: 700; letter-spacing: 0.12em; text-align: right; }

.preview-browser { position: relative; overflow: hidden; border: 1px solid rgba(77, 128, 158, 0.22); border-radius: 18px; background: white; box-shadow: 0 18px 50px rgba(26, 80, 112, 0.15); }
.browser-bar { display: flex; align-items: center; gap: 6px; height: 34px; padding: 0 12px; border-bottom: 1px solid #dbeaf3; background: #f7fbfe; }
.browser-bar i { width: 7px; height: 7px; border-radius: 50%; background: #b9d5e6; }
.browser-bar span { overflow: hidden; margin-left: 5px; color: #7f98a8; font-family: "DM Sans", sans-serif; font-size: 0.6rem; white-space: nowrap; text-overflow: ellipsis; }
.preview-browser iframe { display: block; width: 1280px; height: 720px; border: 0; transform: scale(0.43); transform-origin: top left; pointer-events: none; }
.preview-browser { height: 344px; }

.concept-card > a {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  margin-top: 15px;
  padding: 0 7px 0 3px;
  color: var(--link);
  text-decoration: none;
  font-weight: 700;
}
.concept-card > a span { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; color: white; background: var(--link); transition: transform 180ms ease; }
.concept-card > a:hover span { transform: translateX(4px); }

@media (max-width: 1080px) {
  .concept-grid { grid-template-columns: 1fr; }
  .preview-browser iframe { transform: scale(0.7); }
  .preview-browser { height: 520px; }
}

@media (max-width: 680px) {
  .showcase-header { min-height: 66px; padding: 10px 16px; }
  .showcase-brand img { width: 38px; height: 38px; }
  .showcase-header > p { display: none; }
  .showcase-main { padding-top: 36px; }
  .showcase-heading h1 { font-size: clamp(2rem, 11vw, 3.4rem); }
  .concept-card { border-radius: 22px; }
  .concept-card > header { align-items: start; flex-direction: column; gap: 4px; }
  .concept-card header p { text-align: left; }
  .preview-browser iframe { width: 390px; height: 844px; transform: scale(0.82); }
  .preview-browser { height: 690px; }
}

@media (max-width: 420px) {
  .preview-browser iframe { transform: scale(0.72); }
  .preview-browser { height: 608px; }
}