:root {
  color-scheme: light;
  font-family: "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  color: #07345b;
  background: #087dc2;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  min-width: 320px;
}

.page-background {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: url("/portal-assets/portal-hero.png");
  background-position: center 58%;
  background-size: cover;
}

.page-background::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(180deg, rgba(0, 95, 167, 0.1) 0%, rgba(0, 82, 147, 0.12) 42%, rgba(0, 34, 74, 0.62) 100%),
    linear-gradient(90deg, rgba(0, 54, 101, 0.22), transparent 60%);
}

.portal {
  width: min(1080px, calc(100% - 40px));
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(48px, 8vh, 96px) 0 56px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: clamp(56px, 12vh, 132px);
}

.hero {
  width: min(720px, 100%);
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 47, 92, 0.42);
}

.eyebrow,
.card-label {
  margin: 0;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.eyebrow {
  margin-bottom: 12px;
  font-size: 0.75rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.15;
  letter-spacing: 0.05em;
}

.lead {
  margin: 18px 0 0;
  font-size: clamp(0.95rem, 1.8vw, 1.12rem);
  font-weight: 600;
  line-height: 1.8;
}

.mobile-break {
  display: none;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.tool-card {
  padding: 25px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 20px;
  background: rgba(250, 254, 255, 0.9);
  box-shadow: 0 18px 50px rgba(0, 39, 80, 0.24);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.card-heading {
  display: flex;
  align-items: center;
  gap: 14px;
}

.card-icon {
  display: grid;
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(145deg, #10a9e6, #0862b2);
  box-shadow: 0 8px 18px rgba(5, 105, 180, 0.22);
  font-size: 1.35rem;
  font-weight: 900;
}

.card-label {
  color: #218ac6;
  font-size: 0.68rem;
}

h2 {
  margin: 3px 0 0;
  color: #07345b;
  font-size: 1.35rem;
}

.description {
  min-height: 4.8em;
  margin: 18px 0 20px;
  color: #315b7d;
  font-size: 0.9rem;
  line-height: 1.75;
}

.actions {
  display: flex;
  gap: 10px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  flex: 1;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button:focus-visible {
  outline: 3px solid #f9d96a;
  outline-offset: 3px;
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, #0e9bd9, #075ba8);
  box-shadow: 0 8px 18px rgba(4, 89, 160, 0.22);
}

.button-primary:hover {
  box-shadow: 0 11px 22px rgba(4, 89, 160, 0.3);
}

.button-secondary {
  border-color: #8ecae8;
  color: #07568f;
  background: rgba(235, 248, 255, 0.88);
}

.button-secondary:hover {
  background: #dff4ff;
}

@media (max-width: 720px) {
  .portal {
    width: min(100% - 24px, 540px);
    padding: 40px 0 28px;
    gap: 48px;
  }

  .page-background {
    background-position: 50% center;
  }

  .page-background::after {
    background: linear-gradient(180deg, rgba(0, 72, 130, 0.18), rgba(0, 38, 79, 0.66));
  }

  .mobile-break {
    display: initial;
  }

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

  .tool-card {
    padding: 21px;
  }

  .description {
    min-height: 0;
  }
}

@media (max-width: 420px) {
  .actions {
    flex-direction: column;
  }
}

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