/* ===============================================
   Medical × Digital — Personal Site
   Color: Dark Blue × Cyan / Futuristic & Minimal
   =============================================== */

/* -------- CSS Variables (一元管理) -------- */
:root {
  --bg-0: #06091a;
  --bg-1: #0a0e27;
  --bg-2: #0f1535;
  --bg-3: #131a44;

  --text-1: #e7ecff;
  --text-2: #aab4d4;
  --text-3: #6c779a;

  --accent: #00d4ff;
  --accent-soft: #7df9ff;
  --accent-deep: #0096c7;
  --accent-glow: 0 0 24px rgba(0, 212, 255, 0.45);

  --border: rgba(125, 249, 255, 0.18);
  --border-strong: rgba(125, 249, 255, 0.4);

  --glass-bg: rgba(20, 28, 60, 0.45);
  --glass-blur: 14px;

  --max-w: 1180px;
  --radius: 16px;
  --radius-sm: 10px;

  --font-en: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-jp: "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* -------- Reset & Base -------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-jp), var(--font-en);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-1);
  background: var(--bg-0);
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(0, 150, 199, 0.18) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(0, 212, 255, 0.12) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 50%, var(--bg-1) 100%);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

ul {
  list-style: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}

/* -------- Navigation -------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(6, 9, 26, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: padding 0.3s var(--ease);
}

.nav.is-scrolled {
  padding: 10px 0;
  background: rgba(6, 9, 26, 0.85);
}

.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.nav__logo-mark {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: var(--bg-0);
  font-weight: 700;
  box-shadow: var(--accent-glow);
}

.nav__logo-text {
  font-size: 0.95rem;
  color: var(--text-1);
}

.nav__menu {
  display: flex;
  gap: 32px;
}

.nav__link {
  font-family: var(--font-en);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-2);
  position: relative;
  padding: 4px 0;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--ease);
  box-shadow: var(--accent-glow);
}

.nav__link:hover {
  color: var(--accent-soft);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-1);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav__toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* -------- Hero -------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 120px 32px 80px;
}

.hero__particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.7;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(125, 249, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125, 249, 255, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  z-index: 1;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.hero__eyebrow {
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.5em;
  color: var(--accent);
  margin-bottom: 24px;
  text-shadow: var(--accent-glow);
}

.hero__title {
  font-family: var(--font-en);
  font-size: clamp(2.6rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #b9e7ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__role {
  font-size: 1.05rem;
  color: var(--text-2);
  margin-bottom: 32px;
  letter-spacing: 0.08em;
}

.hero__catch {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--text-1);
  margin-bottom: 48px;
  line-height: 1.9;
}

.hero__cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 999px;
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
  border: 1px solid transparent;
  cursor: pointer;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: var(--bg-0);
  box-shadow: var(--accent-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.65);
}

.btn--ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--accent-soft);
}

.btn--ghost:hover {
  background: rgba(0, 212, 255, 0.08);
  transform: translateY(-2px);
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.hero__scroll span {
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, transparent, var(--accent));
  position: relative;
  overflow: hidden;
}

.hero__scroll span::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: var(--accent-soft);
  animation: scrollLine 2s var(--ease) infinite;
}

@keyframes scrollLine {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(200%); }
}

.hero__scroll p {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  color: var(--text-3);
}

/* -------- Section Common -------- */
.section {
  padding: 120px 32px;
  position: relative;
}

.section__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section__head {
  text-align: center;
  margin-bottom: 72px;
}

.section__num {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.4em;
  color: var(--accent);
  margin-bottom: 16px;
  padding: 4px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.section__title {
  font-family: var(--font-en);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  background: linear-gradient(180deg, var(--text-1) 0%, var(--accent-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section__sub {
  color: var(--text-3);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

/* -------- Glass Card -------- */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.glass:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15);
}

/* -------- About -------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 56px;
  align-items: center;
}

.about__visual-frame {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, var(--bg-2) 0%, var(--bg-3) 100%);
  position: relative;
}

.about__visual-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 30%, rgba(0, 212, 255, 0.25), transparent 60%),
    linear-gradient(180deg, transparent 50%, rgba(0, 212, 255, 0.08));
}

.about__visual-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--text-3);
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.4em;
  z-index: 2;
}

.about__lead {
  font-size: 1.2rem;
  line-height: 1.9;
  color: var(--text-1);
  margin-bottom: 24px;
  font-weight: 500;
}

.about__text {
  color: var(--text-2);
  margin-bottom: 32px;
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.about__tags li {
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--accent-soft);
  background: rgba(0, 212, 255, 0.04);
}

/* -------- Vision -------- */
.vision__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.vision__card {
  padding: 36px 28px;
}

.vision__icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.18), rgba(0, 212, 255, 0.04));
  border: 1px solid var(--border);
  color: var(--accent);
  margin-bottom: 24px;
}

.vision__icon svg {
  width: 28px;
  height: 28px;
}

.vision__card h3 {
  font-family: var(--font-jp);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-1);
}

.vision__card p {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.85;
}

/* -------- Apps -------- */
.apps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.app-card {
  display: flex;
  flex-direction: column;
}

.app-card__thumb {
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(135deg, rgba(0, 212, 255, 0.12), rgba(0, 212, 255, 0)),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg-3) 100%);
  display: grid;
  place-items: center;
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
  position: relative;
}

.app-card__thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(125, 249, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125, 249, 255, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* ヘルサポート用サムネイル(ヘルスケア: ティール/シアン) */
.app-card__thumb--heal {
  background:
    radial-gradient(ellipse at 30% 30%, rgba(0, 212, 255, 0.28), transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(125, 249, 255, 0.18), transparent 65%),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg-3) 100%);
  color: #e6fcff;
}

/* ポイントクエスト用サムネイル(ライフスタイル: アンバー/ゴールド) */
.app-card__thumb--quest {
  background:
    radial-gradient(ellipse at 30% 30%, rgba(255, 186, 73, 0.26), transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(255, 215, 105, 0.16), transparent 65%),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg-3) 100%);
  color: #fff3d9;
}

.app-card__thumb--quest::after {
  background-image:
    linear-gradient(rgba(255, 215, 105, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 215, 105, 0.10) 1px, transparent 1px);
}

.app-card__body {
  padding: 24px 24px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.app-card__tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.app-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-1);
}

.app-card__desc {
  font-size: 0.92rem;
  color: var(--text-2);
  margin-bottom: 18px;
  flex: 1;
}

.app-card__link {
  font-family: var(--font-en);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--accent-soft);
  align-self: flex-start;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), letter-spacing 0.2s var(--ease);
}

.app-card__link:hover {
  border-color: var(--accent);
  letter-spacing: 0.04em;
}

/* -------- Contact -------- */
.contact__box {
  padding: 56px 40px;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.contact__lead {
  color: var(--text-2);
  margin-bottom: 28px;
}

.contact__mail {
  display: inline-block;
  font-family: var(--font-en);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 600;
  color: var(--accent-soft);
  margin-bottom: 32px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
  letter-spacing: 0.02em;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.contact__mail:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.contact__social {
  display: flex;
  gap: 28px;
  justify-content: center;
}

.contact__social a {
  font-family: var(--font-en);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--text-2);
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.contact__social a:hover {
  color: var(--accent);
  border-color: var(--border-strong);
  background: rgba(0, 212, 255, 0.06);
}

/* -------- Footer -------- */
.footer {
  padding: 40px 32px;
  border-top: 1px solid var(--border);
  background: rgba(6, 9, 26, 0.6);
}

.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
}

.footer__copy {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--text-3);
  letter-spacing: 0.05em;
}

/* -------- Reveal Animation -------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* -------- Responsive -------- */
@media (max-width: 960px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .about__visual {
    max-width: 360px;
    margin: 0 auto;
  }
  .vision__grid,
  .apps__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .nav__menu {
    position: fixed;
    inset: 64px 0 auto 0;
    background: rgba(6, 9, 26, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    flex-direction: column;
    padding: 32px;
    gap: 24px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.3s var(--ease);
  }
  .nav__menu.is-open {
    transform: translateY(0);
  }
  .nav__toggle {
    display: flex;
  }
  .nav__inner {
    padding: 0 20px;
  }

  .section {
    padding: 88px 20px;
  }
  .section__head {
    margin-bottom: 48px;
  }

  .vision__grid,
  .apps__grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 100px 20px 60px;
  }
  .hero__cta {
    flex-direction: column;
    align-items: stretch;
    max-width: 280px;
    margin: 0 auto;
  }
  .btn {
    width: 100%;
  }

  .contact__box {
    padding: 40px 24px;
  }
  .contact__social {
    flex-wrap: wrap;
    gap: 12px;
  }
}

/* -------- Vision card link (訪問看護ステーション → サブサイトへの導線) -------- */
.vision__card--link {
  display: block;
  color: inherit;
  text-decoration: none;
  position: relative;
  transition: transform .3s var(--ease, cubic-bezier(.25,.1,.25,1)), box-shadow .3s ease, border-color .3s ease;
}
.vision__card--link:hover,
.vision__card--link:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(110, 231, 255, 0.45);
  box-shadow: 0 18px 40px rgba(6, 22, 48, 0.35);
  color: inherit;
}
.vision__card-more {
  display: inline-block;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed rgba(255, 255, 255, 0.14);
  width: 100%;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: #6ee7ff;
  opacity: 0.85;
  transition: opacity .3s ease, letter-spacing .3s ease;
}
.vision__card--link:hover .vision__card-more,
.vision__card--link:focus-visible .vision__card-more {
  opacity: 1;
  letter-spacing: 0.08em;
}