/* ================================================
   心理ノート - Top Page Design System
   Corporate / Trust & Authority
   ================================================ */

/* ---------- Design Tokens ---------- */
:root {
  --color-primary: #2C5F6E;
  --color-primary-dark: #1E4A57;
  --color-secondary: #4A8A9A;
  --color-secondary-light: #E8F1F4;
  --color-cta: #1A6B5A;
  --color-cta-hover: #145A4B;

  --color-text: #1A2332;
  --color-text-sub: #4A5568;
  --color-text-muted: #8896A6;

  --color-bg: #FAFBFC;
  --color-bg-alt: #F1F4F7;
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;

  --font-heading: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-body: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 2rem;
  --fs-4xl: 2.5rem;

  --lh-tight: 1.4;
  --lh-base: 1.8;
  --lh-relaxed: 2;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 5rem;

  --max-width: 960px;
  --header-h: 64px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: var(--header-h);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(250, 251, 252, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.04em;
}

.header__logo a { color: inherit; }
.header__logo a:hover { color: var(--color-primary); }

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.header__link {
  font-size: var(--fs-sm);
  color: var(--color-text-sub);
  transition: color var(--transition);
}

.header__link:hover {
  color: var(--color-primary);
}

.header__cta-link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-white);
  background: var(--color-primary);
  padding: 8px 20px;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}

.header__cta-link:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

.header__cta-link--pc { display: inline-block; }
.header__cta-link--sp { display: none; }

@media (max-width: 768px) {
  .header__cta-link--pc { display: none; }
  .header__cta-link--sp { display: inline-block; }
}

/* ---------- Hamburger ---------- */
.header__burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}

.header__burger-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.header__burger-inner {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.header__burger[aria-expanded="true"] .header__burger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.header__burger[aria-expanded="true"] .header__burger-bar:nth-child(2) {
  opacity: 0;
}
.header__burger[aria-expanded="true"] .header__burger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Mobile Nav ---------- */
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 105;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  max-width: 80vw;
  height: 100vh;
  height: 100dvh;
  background: var(--color-white);
  z-index: 110;
  padding: calc(var(--header-h) + var(--space-xl)) var(--space-xl) var(--space-xl);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
}

.mobile-nav.is-open {
  transform: translateX(0);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 14px 0;
  font-size: var(--fs-base);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition);
}

.mobile-nav__link:hover {
  color: var(--color-primary);
}

.mobile-nav__link svg {
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.mobile-nav__cta {
  display: block;
  margin-top: var(--space-xl);
  text-align: center;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-white);
  background: var(--color-primary);
  padding: 12px;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}

.mobile-nav__cta:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

/* ---------- Container ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ---------- Hero ---------- */
.hero {
  padding: var(--space-4xl) 0;
  background: linear-gradient(
    180deg,
    var(--color-secondary-light) 0%,
    var(--color-bg) 100%
  );
}

.hero__inner {
  max-width: 720px;
}

.hero__subtitle {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(44, 95, 110, 0.08);
  padding: 4px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: var(--fs-3xl);
  font-weight: 600;
  line-height: var(--lh-tight);
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

.hero__lead {
  font-size: var(--fs-lg);
  color: var(--color-text-sub);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2xl);
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-cta);
  color: var(--color-white);
  border-color: var(--color-cta);
}

.btn--primary:hover {
  background: var(--color-cta-hover);
  border-color: var(--color-cta-hover);
  color: var(--color-white);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text-sub);
  border-color: var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------- Section ---------- */
.section {
  padding: var(--space-4xl) 0;
}

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

.section__header {
  margin-bottom: var(--space-2xl);
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.section__lead {
  font-size: var(--fs-base);
  color: var(--color-text-sub);
}

/* ---------- Grid ---------- */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

/* ---------- Card ---------- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__title {
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.card__text {
  font-size: var(--fs-sm);
  color: var(--color-text-sub);
  line-height: var(--lh-base);
}

.card__cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-primary);
  transition: color var(--transition);
  cursor: pointer;
}

.card__cta:hover {
  color: var(--color-primary-dark);
}

.card__cta svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition);
}

.card__cta:hover svg {
  transform: translateX(3px);
}

/* ---------- Numbers (Trust Signals) ---------- */
.numbers {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3xl);
  flex-wrap: wrap;
}

.numbers__item {
  text-align: center;
}

.numbers__value {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--fs-4xl);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.2;
}

.numbers__value small {
  font-size: 0.45em;
  font-weight: 400;
  color: var(--color-text-muted);
}

.numbers__label {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--fs-sm);
  color: var(--color-text-sub);
}

.numbers__divider {
  width: 1px;
  height: 48px;
  background: var(--color-border);
}

/* ---------- Profile ---------- */
.profile {
  display: flex;
  gap: var(--space-2xl);
  align-items: flex-start;
}

.profile__image {
  flex-shrink: 0;
}

.profile__image img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-bg-alt);
}

.profile__name {
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.profile__role {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.profile__body p {
  font-size: var(--fs-sm);
  color: var(--color-text-sub);
  line-height: var(--lh-base);
  margin-bottom: var(--space-sm);
}

.profile__body p:last-child {
  margin-bottom: 0;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-text);
  color: var(--color-white);
  padding: var(--space-2xl) 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.footer__nav {
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__link {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__copy {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.4);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .header__nav { display: none; }
  .header__burger { display: flex; }

  .hero { padding: var(--space-2xl) 0 var(--space-3xl); }
  .hero__title { font-size: var(--fs-2xl); }
  .hero__lead { font-size: var(--fs-base); }

  .section { padding: var(--space-3xl) 0; }
  .section__title { font-size: var(--fs-xl); }

  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }

  .numbers { gap: var(--space-xl); }
  .numbers__value { font-size: var(--fs-3xl); }
  .numbers__divider { display: none; }

  .profile {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer__nav { gap: var(--space-md); }
}

@media (min-width: 769px) {
  .header__burger { display: none; }
  .mobile-nav,
  .mobile-overlay { display: none !important; }
}