/* ==========================
   たかの整骨院 — style.css
   ========================== */

:root {
  --color-primary:       #1a6ab0;
  --color-primary-dark:  #0d4a80;
  --color-primary-light: #e8f4ff;
  --color-secondary:     #40a0d0;
  --color-accent:        #ff6040;
  --color-text:          #f0f4f8;
  --color-text-muted:    #90b0c8;
  --color-text-dark:     #1a2a38;
  --color-text-dark-muted:#5a7888;
  --color-bg:            #0a1a28;
  --color-bg-alt:        #0f2030;
  --color-bg-card:       #142030;
  --color-bg-light:      #f8fcff;
  --color-bg-light-alt:  #eef6ff;
  --color-white:         #ffffff;
  --color-border:        #1e3850;
  --color-border-light:  #c0dff0;

  --font-family:       'Noto Sans JP', sans-serif;
  --font-family-serif: 'Noto Serif JP', serif;

  --space-xs:  0.5rem;
  --space-sm:  0.75rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;

  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  --container-max: 1100px;
  --header-height: 64px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
body { font-family: var(--font-family); font-size: 1rem; color: var(--color-text); background-color: var(--color-bg); line-height: 1.8; -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul[role="list"] { list-style: none; }
.container { max-width: var(--container-max); margin-inline: auto; padding-inline: var(--space-lg); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.site-header { position: sticky; top: 0; z-index: 100; background-color: rgba(10,26,40,0.97); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-sm); backdrop-filter: blur(8px); }
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); height: var(--header-height); }
.site-logo { display: flex; flex-direction: column; gap: 0; text-decoration: none; }
.site-logo__main { font-family: var(--font-family-serif); font-size: 1.25rem; font-weight: 700; color: var(--color-secondary); line-height: 1.2; }
.site-logo__sub { font-size: 0.65rem; color: var(--color-text-muted); }

.site-nav__list { display: flex; gap: var(--space-xl); }
.site-nav__link { color: var(--color-text-muted); padding-block: var(--space-xs); border-bottom: 1px solid transparent; transition: color var(--transition-fast), border-color var(--transition-fast); font-size: 0.9375rem; }
.site-nav__link:is(:hover, :focus-visible, .is-active) { color: var(--color-secondary); border-bottom-color: var(--color-secondary); outline: none; }

.hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; background: none; border: 2px solid transparent; border-radius: var(--radius-sm); cursor: pointer; padding: var(--space-xs); width: 44px; height: 44px; flex-shrink: 0; transition: border-color var(--transition-fast); }
.hamburger:focus-visible { border-color: var(--color-secondary); outline: none; }
.hamburger__line { display: block; width: 22px; height: 1.5px; background-color: var(--color-text-muted); border-radius: var(--radius-full); transition: transform var(--transition-base), opacity var(--transition-fast); }
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger[aria-expanded="true"] .hamburger__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); padding: 0.75rem 1.75rem; border-radius: var(--radius-sm); font-weight: 700; font-size: 1rem; min-height: 44px; cursor: pointer; transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast); border: 1px solid transparent; }
.btn--primary { background-color: var(--color-accent); color: var(--color-white); }
.btn--primary:is(:hover, :focus-visible) { background-color: #cc4020; transform: translateY(-2px); outline: none; }
.btn--outline { background-color: transparent; color: var(--color-secondary); border-color: var(--color-secondary); }
.btn--outline:is(:hover, :focus-visible) { background-color: var(--color-secondary); color: var(--color-bg); transform: translateY(-2px); outline: none; }

.section-header { text-align: center; margin-bottom: var(--space-2xl); }
.section-eyebrow { display: inline-block; color: var(--color-secondary); font-size: 0.75rem; letter-spacing: 0.2em; margin-bottom: var(--space-xs); }
.section-title { font-family: var(--font-family-serif); font-size: clamp(1.5rem, 4vw, 2.25rem); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-sm); }
.section-desc { color: var(--color-text-muted); max-width: 560px; margin-inline: auto; font-size: 0.9375rem; }

.hero { position: relative; min-height: 80vh; display: flex; align-items: center; overflow: hidden; }
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.hero__bg svg { width: 100%; height: 100%; object-fit: cover; }
.hero__content { position: relative; z-index: 1; padding-block: var(--space-3xl); }
.hero__eyebrow { display: inline-block; font-size: 0.875rem; color: var(--color-secondary); letter-spacing: 0.1em; margin-bottom: var(--space-md); border-left: 3px solid var(--color-accent); padding-left: var(--space-sm); }
.hero__title { font-family: var(--font-family-serif); font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; line-height: 1.5; color: var(--color-white); margin-bottom: var(--space-md); }
.hero__desc { max-width: 540px; color: rgba(240,244,248,0.8); line-height: 2; margin-bottom: var(--space-xl); font-size: 0.9375rem; }
.hero__actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }

.symptoms-section { padding-block: var(--space-3xl); background-color: var(--color-bg-light); }
.symptoms-section .section-title { color: var(--color-text-dark); }
.symptoms-section .section-eyebrow { color: var(--color-primary); }
.symptom-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.symptom-card { background-color: var(--color-white); border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); padding: var(--space-xl); text-align: center; }
.symptom-card__icon { width: 64px; height: 64px; margin-inline: auto; margin-bottom: var(--space-md); }
.symptom-card__title { font-family: var(--font-family-serif); font-size: 1.0625rem; font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-xs); }
.symptom-card__desc { font-size: 0.875rem; color: var(--color-text-dark-muted); line-height: 1.8; }

.treatment-section { padding-block: var(--space-3xl); background-color: var(--color-bg-alt); }
.treatment-section .section-title { color: var(--color-text); }
.treatment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.treatment-card { background-color: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-lg); }
.treatment-card--featured { border-color: var(--color-accent); }
.treatment-card__title { font-family: var(--font-family-serif); font-size: 1.0625rem; font-weight: 700; color: var(--color-secondary); margin-bottom: var(--space-xs); }
.treatment-card__desc { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.8; margin-bottom: var(--space-sm); }
.treatment-card__price { font-size: 0.9375rem; font-weight: 700; color: var(--color-accent); }

.accident-section { padding-block: var(--space-3xl); background-color: var(--color-bg-light-alt); }
.accident-inner { display: grid; grid-template-columns: 1fr 380px; gap: var(--space-2xl); align-items: center; }
.accident-text { display: flex; flex-direction: column; gap: var(--space-lg); }
.accident-text .section-eyebrow { text-align: left; color: var(--color-primary); }
.accident-title { font-family: var(--font-family-serif); font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; color: var(--color-text-dark); text-align: left; }
.accident-lead { font-size: 1.0625rem; color: var(--color-primary); font-weight: 700; }
.accident-points { display: flex; flex-direction: column; gap: var(--space-md); }
.accident-point { display: flex; gap: var(--space-md); align-items: flex-start; }
.accident-point__icon { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; background-color: var(--color-primary); color: white; border-radius: var(--radius-full); font-size: 0.875rem; font-weight: 700; flex-shrink: 0; margin-top: 2px; }
.accident-point strong { display: block; color: var(--color-text-dark); font-size: 1rem; margin-bottom: 4px; }
.accident-point p { font-size: 0.875rem; color: var(--color-text-dark-muted); line-height: 1.7; }
.accident-visual svg { width: 100%; }

.hours-section { padding-block: var(--space-3xl); background-color: var(--color-bg-light); }
.hours-section .section-title { color: var(--color-text-dark); }
.hours-section .section-eyebrow { color: var(--color-primary); }
.hours-inner { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2xl); align-items: start; }
.hours-table { width: 100%; border-collapse: collapse; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.hours-table th { background-color: var(--color-primary); color: white; padding: var(--space-sm); text-align: center; font-size: 0.875rem; }
.hours-table td { padding: var(--space-sm); text-align: center; border-bottom: 1px solid var(--color-border-light); font-size: 0.875rem; background-color: white; }
.hours-time { text-align: left !important; color: var(--color-text-dark-muted); font-size: 0.8125rem !important; }
.hours-open { color: var(--color-primary); font-weight: 700; }
.hours-closed { color: #ccc; }
.hours-note { font-size: 0.8125rem; color: var(--color-text-dark-muted); margin-top: var(--space-sm); line-height: 1.7; }
.info-list { display: flex; flex-direction: column; }
.info-list__item { display: grid; grid-template-columns: 70px 1fr; gap: var(--space-md); padding-block: var(--space-md); border-bottom: 1px solid var(--color-border-light); }
.info-list__item:last-child { border-bottom: none; }
.info-list__label { font-size: 0.875rem; font-weight: 700; color: var(--color-primary); padding-top: 2px; }
.info-list__value { color: var(--color-text-dark); line-height: 1.7; font-size: 0.9375rem; }
.tel-link { color: var(--color-primary); font-weight: 700; font-size: 1.25rem; }
.tel-link:hover { text-decoration: underline; }

.site-footer { background-color: var(--color-bg); border-top: 1px solid var(--color-border); padding-top: var(--space-2xl); }
.footer__inner { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-xl); padding-bottom: var(--space-xl); border-bottom: 1px solid var(--color-border); }
.footer__logo { font-family: var(--font-family-serif); font-size: 1.125rem; color: var(--color-secondary); font-weight: 700; }
.footer__tagline { font-size: 0.8125rem; color: var(--color-text-muted); margin-top: var(--space-xs); }
.footer__nav-list { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer__nav-list a { font-size: 0.9375rem; color: var(--color-text-muted); transition: color var(--transition-fast); }
.footer__nav-list a:hover { color: var(--color-secondary); }
.footer__bottom { padding-block: var(--space-md); }
.footer__copy { font-size: 0.8125rem; color: var(--color-text-muted); text-align: center; }

@media (max-width: 768px) {
  :root { --header-height: 56px; }
  .hamburger { display: flex; }
  .site-nav { display: none; position: fixed; top: var(--header-height); inset-inline: 0; background-color: var(--color-bg-alt); padding: var(--space-md) var(--space-lg) var(--space-xl); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-md); z-index: 99; }
  .site-nav.is-open { display: block; }
  .site-nav__list { flex-direction: column; gap: 0; }
  .site-nav__link { display: block; padding: var(--space-md) 0; border-bottom: 1px solid var(--color-border); font-size: 1.0625rem; }
  .hero { min-height: 70vh; }
  .hero__actions { flex-direction: column; }
  .symptom-grid { grid-template-columns: 1fr 1fr; }
  .treatment-grid { grid-template-columns: 1fr 1fr; }
  .accident-inner { grid-template-columns: 1fr; }
  .accident-visual { display: none; }
  .hours-inner { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; gap: var(--space-lg); }
}

@media (max-width: 480px) {
  .symptom-grid { grid-template-columns: 1fr; }
  .treatment-grid { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; }
}