/* ==========================
   麺屋 轟 — style.css
   ========================== */

:root {
  --color-primary:       #c0392b;
  --color-primary-dark:  #8b1a00;
  --color-primary-light: #ff6b35;
  --color-secondary:     #f5c842;
  --color-accent:        #ff8c00;
  --color-text:          #f0e8d8;
  --color-text-muted:    #a09080;
  --color-bg:            #0d0500;
  --color-bg-alt:        #1a0a00;
  --color-bg-card:       #220e00;
  --color-white:         #ffffff;
  --color-border:        #3d1800;

  --font-family:       'Noto Sans JP', sans-serif;
  --font-family-title: 'Zen Kaku Gothic New', sans-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(0,0,0,0.5);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.6);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.7);

  --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: 1.7; -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); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background-color: rgba(13,5,0,0.96); 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; align-items: center; gap: var(--space-sm); }
.site-logo__kanji { font-family: var(--font-family-title); font-size: 2rem; font-weight: 900; color: var(--color-primary); line-height: 1; text-shadow: 0 0 12px rgba(192,57,43,0.5); }
.site-logo__text { font-family: var(--font-family-title); font-size: 1.1rem; font-weight: 700; color: var(--color-text); }

.site-nav__list { display: flex; gap: var(--space-xl); }
.site-nav__link { font-weight: 700; color: var(--color-text-muted); padding-block: var(--space-xs); border-bottom: 2px solid transparent; transition: color var(--transition-fast), border-color var(--transition-fast); }
.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: 2px; background-color: var(--color-text); 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); }

/* Button */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.875rem 2.5rem; border-radius: var(--radius-sm); font-family: var(--font-family-title); font-weight: 700; font-size: 1rem; letter-spacing: 0.05em; min-height: 44px; cursor: pointer; transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast); border: 2px solid transparent; }
.btn--primary { background-color: var(--color-primary); color: var(--color-white); border-color: var(--color-primary); }
.btn--primary:is(:hover, :focus-visible) { background-color: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 0 20px rgba(192,57,43,0.5); outline: none; }

/* Section */
.section-header { text-align: center; margin-bottom: var(--space-2xl); }
.section-eyebrow { display: inline-block; color: var(--color-primary); font-family: var(--font-family-title); font-size: 0.875rem; font-weight: 700; letter-spacing: 0.2em; margin-bottom: var(--space-xs); }
.section-title { font-family: var(--font-family-title); font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 900; color: var(--color-text); margin-bottom: var(--space-sm); }

/* Hero */
.hero { position: relative; min-height: 80vh; display: flex; align-items: center; overflow: hidden; }
.hero__overlay { position: absolute; inset: 0; z-index: 0; }
.hero__overlay 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: 0.12em; margin-bottom: var(--space-md); border-left: 3px solid var(--color-secondary); padding-left: var(--space-sm); }
.hero__title { font-family: var(--font-family-title); font-size: clamp(3rem, 8vw, 6rem); font-weight: 900; line-height: 1.15; color: var(--color-white); margin-bottom: var(--space-md); text-shadow: 0 2px 20px rgba(0,0,0,0.8); }
.hero__desc { max-width: 480px; color: var(--color-text-muted); line-height: 1.9; margin-bottom: var(--space-xl); font-size: 1.0625rem; }

/* Menu */
.menu-section { padding-block: var(--space-3xl); background-color: var(--color-bg-alt); }
.menu-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--space-lg); margin-bottom: var(--space-2xl); }
.menu-card { background-color: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base); }
.menu-card:hover { box-shadow: 0 0 24px rgba(192,57,43,0.3); transform: translateY(-3px); border-color: var(--color-primary); }
.menu-card--featured { grid-column: span 2; }
.menu-card__image svg { width: 100%; aspect-ratio: 4/3; }
.menu-card__body { padding: var(--space-md) var(--space-lg); }
.menu-card__badge { display: inline-block; background-color: var(--color-primary); color: var(--color-white); font-size: 0.6875rem; font-weight: 700; padding: 2px 10px; border-radius: var(--radius-full); margin-bottom: var(--space-xs); }
.menu-card__name { font-family: var(--font-family-title); font-size: 1.125rem; font-weight: 700; color: var(--color-text); margin-bottom: var(--space-xs); }
.menu-card__desc { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.7; margin-bottom: var(--space-sm); }
.menu-card__price { font-family: var(--font-family-title); font-size: 1.5rem; font-weight: 900; color: var(--color-secondary); }

.side-menu { background-color: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-xl); }
.side-menu__title { font-family: var(--font-family-title); font-size: 1.125rem; font-weight: 700; color: var(--color-secondary); margin-bottom: var(--space-md); }
.side-menu__list { display: flex; flex-direction: column; gap: 0; }
.side-item { display: flex; justify-content: space-between; align-items: center; padding-block: var(--space-sm); border-bottom: 1px solid var(--color-border); }
.side-item:last-child { border-bottom: none; }
.side-item__name { color: var(--color-text); }
.side-item__price { font-family: var(--font-family-title); font-weight: 700; color: var(--color-secondary); }

/* Story */
.story-section { padding-block: var(--space-3xl); background-color: var(--color-bg); }
.story-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-xl); }
.story-item { text-align: center; padding: var(--space-xl); }
.story-item__icon { width: 80px; height: 80px; margin: 0 auto var(--space-md); }
.story-item__icon svg { width: 100%; height: 100%; }
.story-item__title { font-family: var(--font-family-title); font-size: 1.125rem; font-weight: 700; color: var(--color-secondary); margin-bottom: var(--space-sm); }
.story-item__desc { color: var(--color-text-muted); line-height: 1.8; font-size: 0.9375rem; }

/* Store Info */
.store-info { padding-block: var(--space-3xl); background-color: var(--color-bg-alt); }
.store-info__inner { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2xl); align-items: start; }
.store-info__map { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); border: 1px solid var(--color-border); }
.store-info__map svg { width: 100%; }
.info-list { display: flex; flex-direction: column; }
.info-list__item { display: grid; grid-template-columns: 100px 1fr; gap: var(--space-md); padding-block: var(--space-md); border-bottom: 1px solid var(--color-border); }
.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); line-height: 1.7; }
.tel-link { color: var(--color-secondary); font-weight: 700; font-size: 1.25rem; }
.tel-link:hover { text-decoration: underline; }
.hours-row { display: block; }

/* Footer */
.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__tagline { font-size: 0.875rem; 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; }
  .menu-card--featured { grid-column: span 1; }
  .store-info__inner { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; gap: var(--space-lg); }
}

@media (max-width: 480px) {
  .menu-grid { grid-template-columns: 1fr; }
  .story-list { grid-template-columns: 1fr; }
  .info-list__item { grid-template-columns: 88px 1fr; }
}