/* ========================================
   地域医療にDXを — dx4regionalcare.com
   Design System: Medical Tech · Premium
   ======================================== */

:root {
  /* Medical trust — emerald / mint */
  --color-primary: #028090;
  --color-primary-dark: #015a66;
  --color-primary-light: #00a896;
  --color-primary-glow: rgba(0, 168, 150, 0.35);

  /* DX · cyber accent */
  --color-accent: #6366f1;
  --color-accent-deep: #4c1d95;
  --color-accent-navy: #1e1b4b;
  --color-accent-soft: rgba(99, 102, 241, 0.08);
  --color-accent-glow: rgba(99, 102, 241, 0.25);

  /* Surfaces */
  --color-surface: #ffffff;
  --color-bg: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-bg-elevated: rgba(255, 255, 255, 0.72);

  /* Text */
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: rgba(148, 163, 184, 0.28);
  --color-border-strong: rgba(2, 128, 144, 0.18);

  /* Semantic */
  --color-warning-bg: rgba(251, 191, 36, 0.1);
  --color-warning-border: #f59e0b;
  --color-success-bg: rgba(0, 168, 150, 0.08);
  --color-success-border: #00a896;

  /* Typography */
  --font-sans: "Noto Sans JP", "Inter", system-ui, sans-serif;
  --font-mono: "Inter", ui-monospace, "SF Mono", monospace;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 30px rgba(2, 128, 144, 0.1), 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 20px 60px rgba(2, 128, 144, 0.14), 0 8px 24px rgba(99, 102, 241, 0.08);
  --shadow-card-hover: 0 32px 64px rgba(2, 128, 144, 0.16), 0 12px 32px rgba(99, 102, 241, 0.12);

  /* Layout */
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --header-h: 80px;
  --max-width: 1200px;
  --section-y: clamp(96px, 12vw, 140px);
  --transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---- Reset & Base ---- */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-break: strict;
  word-break: normal;
  overflow-wrap: break-word;
  text-wrap: pretty;
  hanging-punctuation: allow-end;
}

p,
li,
blockquote,
.project-status,
.join-disclaimer,
.tools-note,
.section-desc,
.hero-lead {
  text-wrap: pretty;
}

h1,
h2,
h3,
.hero-title,
.section-title,
.project-title,
.devlog-title,
.tool-name {
  word-break: keep-all;
  overflow-wrap: normal;
  line-break: strict;
}

.no-break {
  white-space: nowrap;
}

.hero-title {
  text-wrap: wrap;
}

.hero-title-line {
  display: block;
}

.hero-title-line .no-break {
  display: inline-block;
}

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

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-light);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(24px, 5vw, 48px);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 1000;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  border-radius: 0 0 12px 12px;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

/* ---- Header ---- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--color-bg-elevated);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
}

.site-header.scrolled {
  background: rgba(248, 250, 252, 0.92);
  border-bottom-color: var(--color-border);
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #f3e8ff 0%, #e9d5ff 100%);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.5px;
  border-radius: 14px;
  box-shadow: 0 4px 16px var(--color-primary-glow);
}

.logo-mark-sm {
  width: 40px;
  height: 40px;
  font-size: 12px;
  border-radius: 12px;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-weight: 700;
  font-size: 15px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.logo-sub {
  font-size: 11px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.nav-list {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-list a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: 100px;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.nav-list a:hover,
.nav-list a.active {
  background: rgba(0, 168, 150, 0.08);
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-border-strong);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 10px;
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(0, 168, 150, 0.06);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition);
}

.mobile-nav {
  position: absolute;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: rgba(248, 250, 252, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: 20px clamp(24px, 5vw, 48px) 28px;
}

.mobile-nav ul {
  list-style: none;
}

.mobile-nav a {
  display: block;
  padding: 16px 0;
  font-weight: 500;
  font-size: 16px;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.mobile-nav a:hover {
  color: var(--color-primary-light);
}

.mobile-nav li:last-child a {
  border-bottom: none;
}

/* ---- Hero ---- */

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(64px, 10vw, 120px));
  padding-bottom: clamp(80px, 12vw, 140px);
  background: var(--color-bg);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: radial-gradient(circle at 1px 1px, rgba(2, 128, 144, 0.14) 1px, transparent 0);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, black 0%, black 55%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 0%, black 55%, transparent 100%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
    linear-gradient(135deg, rgba(0, 168, 150, 0.12) 0%, transparent 42%),
    linear-gradient(225deg, rgba(99, 102, 241, 0.1) 0%, transparent 38%),
    radial-gradient(ellipse 90% 70% at 80% -10%, rgba(0, 168, 150, 0.18), transparent 60%),
    radial-gradient(ellipse 70% 60% at -5% 90%, rgba(99, 102, 241, 0.12), transparent 55%),
    radial-gradient(ellipse 50% 40% at 50% 50%, rgba(2, 128, 144, 0.05), transparent 70%);
  background-size: 56px 56px, 56px 56px, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 0%, black 20%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 100% 80% at 50% 0%, black 20%, transparent 85%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr minmax(300px, 380px);
  gap: clamp(48px, 8vw, 80px);
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  margin-bottom: clamp(24px, 4vw, 36px);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  background: linear-gradient(135deg, rgba(0, 168, 150, 0.1), rgba(99, 102, 241, 0.08));
  border: 1px solid var(--color-border-strong);
  border-radius: 100px;
  box-shadow: 0 2px 12px rgba(0, 168, 150, 0.08);
}

.hero-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary-light);
  box-shadow: 0 0 10px var(--color-primary-glow);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.03em;
  margin-bottom: clamp(28px, 4vw, 40px);
  background: linear-gradient(
    135deg,
    var(--color-primary-dark) 0%,
    var(--color-primary) 28%,
    var(--color-primary-light) 55%,
    var(--color-accent) 85%,
    var(--color-accent-deep) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

@supports (word-break: auto-phrase) {
  body,
  p,
  li,
  .hero-lead,
  .section-desc,
  .card-feature p,
  .tool-card p,
  .project-body p {
    word-break: auto-phrase;
  }
}

.hero-lead {
  font-size: clamp(16px, 2vw, 18px);
  color: var(--color-text-muted);
  margin-bottom: clamp(36px, 5vw, 48px);
  max-width: 580px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  border-radius: 14px;
  text-decoration: none;
  transition:
    background var(--transition),
    color var(--transition),
    box-shadow var(--transition),
    transform var(--transition-fast),
    border-color var(--transition);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: #fff;
  border: none;
  box-shadow:
    0 4px 20px var(--color-primary-glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow:
    0 8px 32px var(--color-primary-glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.6);
  color: var(--color-accent-deep);
  border: 1.5px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent-deep);
  box-shadow: 0 4px 20px var(--color-accent-glow);
  transform: translateY(-2px);
}

/* ---- Sections & Subpage Headers ---- */

.section {
  padding: var(--section-y) 0;
}

.section:nth-child(even) {
  background: var(--color-bg-alt);
}

/* 下層ページ用ヒーローヘッダー (色味の一貫性を保持) */
.page-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(40px, 6vw, 64px));
  padding-bottom: clamp(40px, 6vw, 64px);
  background: linear-gradient(180deg, rgba(224, 242, 254, 0.3) 0%, rgba(248, 250, 252, 0) 100%);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  margin-bottom: clamp(40px, 6vw, 64px);
}

.section-tag,
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 16px;
  padding: 6px 16px;
  border-radius: 100px;
  color: var(--color-primary-dark);
  background: #e0f2fe;
  border: 1px solid rgba(2, 128, 144, 0.2);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  line-height: 1.2;
}

.section-desc {
  font-size: clamp(16px, 2vw, 18px);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
  line-height: 1.85;
}

/* ---- Cards ---- */

.card-grid {
  display: grid;
  gap: clamp(24px, 4vw, 32px);
}

.three-col {
  grid-template-columns: repeat(3, 1fr);
}

.two-col {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(32px, 4vw, 40px);
  box-shadow: var(--shadow-sm);
  transition:
    box-shadow var(--transition),
    transform var(--transition),
    border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-8px);
  border-color: var(--color-border-strong);
}

/* ---- Filter Controls ---- */

.btn-filter {
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 100px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-filter:hover,
.btn-filter.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

/* ---- Animations ---- */

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(0, 168, 150, 0.45);
  }
  50% {
    opacity: 0.75;
    transform: scale(1.15);
    box-shadow: 0 0 0 8px rgba(0, 168, 150, 0);
  }
}

/* ---- Footer ---- */

.site-footer {
  padding: clamp(48px, 6vw, 64px) 0;
  background: linear-gradient(180deg, var(--color-accent-navy) 0%, #0f0e1a 100%);
  color: rgba(255, 255, 255, 0.82);
  position: relative;
  overflow: hidden;
}

.footer-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
}

.admin-link a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.admin-link a:hover {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: underline;
}

/* ---- SNS Links ---- */
.footer-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 8px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-primary);
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

.social-icon {
  width: 20px;
  height: 20px;
}

/* ---- Responsive ---- */

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .three-col,
  .two-col {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
}