/* ============================================
   前橋市観光ガイド - スタイルシート
   Designed with love by the design team
   ============================================ */

/* ============================================
   CSS Variables
   ============================================ */
:root {
  /* Colors */
  --color-primary: #558B2F;
  --color-primary-light: #7CB342;
  --color-primary-dark: #33691E;
  --color-secondary: #AED581;
  --color-accent: #8D6E63;
  --color-accent-light: #A1887F;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-bg: #FAFAFA;
  --color-white: #FFFFFF;
  --color-overlay: rgba(0, 0, 0, 0.4);

  /* Typography */
  --font-main: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-accent: 'Yuji Syuku', serif;

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 80px;

  /* Shadows */
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-header: 0 2px 8px rgba(0, 0, 0, 0.1);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Layout */
  --container-max: 1200px;
  --header-height: 72px;
  --header-height-sp: 60px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

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

/* ============================================
   Utility Classes
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (max-width: 767px) {
  .container {
    padding: 0 var(--space-sm);
  }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes slideUnderline {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Header
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.header.scrolled {
  background-color: var(--color-white);
  box-shadow: var(--shadow-header);
}

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

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-white);
  font-weight: 600;
  font-size: 18px;
  transition: color var(--transition-normal);
}

.header.scrolled .header__logo {
  color: var(--color-primary);
}

.header__logo-icon {
  width: 28px;
  height: 28px;
}

.header__leaf {
  width: 20px;
  height: 20px;
  color: var(--color-secondary);
  margin-left: -4px;
}

.header__nav {
  display: flex;
}

.header__nav-list {
  display: flex;
  gap: var(--space-lg);
}

.header__nav-link {
  color: var(--color-white);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-normal);
}

.header.scrolled .header__nav-link {
  color: var(--color-text);
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-secondary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.header__nav-link:hover::after,
.header__nav-link:focus::after {
  transform: scaleX(1);
}

/* Mobile Menu Button */
.header__menu-btn {
  display: none;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
}

.header__menu-icon {
  position: relative;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: background-color var(--transition-normal);
}

.header.scrolled .header__menu-icon {
  background-color: var(--color-text);
}

.header__menu-icon::before,
.header__menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: inherit;
  transition: transform var(--transition-normal);
}

.header__menu-icon::before {
  top: -8px;
}

.header__menu-icon::after {
  bottom: -8px;
}

/* Menu Open State */
.header__menu-btn.active .header__menu-icon {
  background-color: transparent;
}

.header__menu-btn.active .header__menu-icon::before {
  transform: translateY(8px) rotate(45deg);
  background-color: var(--color-text);
}

.header__menu-btn.active .header__menu-icon::after {
  transform: translateY(-8px) rotate(-45deg);
  background-color: var(--color-text);
}

@media (max-width: 767px) {
  .header {
    height: var(--header-height-sp);
  }

  .header__nav {
    display: none;
  }

  .header__menu-btn {
    display: flex;
  }

  .header__logo-text {
    font-size: 16px;
  }
}

/* ============================================
   Mobile Menu
   ============================================ */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background-color: var(--color-white);
  z-index: 999;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu__nav {
  padding: calc(var(--header-height-sp) + var(--space-lg)) var(--space-md);
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-menu__link {
  display: block;
  padding: var(--space-sm);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link:focus {
  background-color: var(--color-secondary);
  color: var(--color-primary-dark);
}

/* Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('https://images.unsplash.com/photo-1528360983277-13d401cdc186?w=1920&q=80');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero__overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.3) 0%,
    rgba(0, 0, 0, 0.4) 50%,
    rgba(0, 0, 0, 0.6) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-white);
  padding: var(--space-md);
}

.hero__catchphrase {
  font-family: var(--font-accent);
  font-size: 24px;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 1s ease 0.3s both;
}

.hero__title {
  font-family: var(--font-accent);
  font-size: 72px;
  font-weight: 400;
  letter-spacing: 0.3em;
  margin-left: 0.3em;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 1s ease 0.6s both;
}

.hero__subtitle {
  font-size: 14px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  opacity: 0.8;
  animation: fadeInUp 1s ease 0.9s both;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-white);
  text-align: center;
  animation: fadeInUp 1s ease 1.2s both;
}

.hero__scroll-text {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.hero__scroll-arrow {
  display: block;
  width: 24px;
  height: 24px;
  margin: 0 auto;
  border-left: 2px solid var(--color-white);
  border-bottom: 2px solid var(--color-white);
  transform: rotate(-45deg);
  animation: bounce 2s infinite;
}

@media (max-width: 767px) {
  .hero__catchphrase {
    font-size: 18px;
  }

  .hero__title {
    font-size: 48px;
  }

  .hero__subtitle {
    font-size: 12px;
  }
}

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

.section__title {
  text-align: center;
  margin-bottom: var(--space-md);
}

.section__title-text {
  display: inline-block;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  position: relative;
}

.section__title-line {
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--color-accent);
  margin: var(--space-sm) auto 0;
  border-radius: 2px;
  /* Hand-drawn style - slightly wavy */
  background: linear-gradient(90deg,
    var(--color-accent) 0%,
    var(--color-accent-light) 50%,
    var(--color-accent) 100%
  );
}

.section__lead {
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 767px) {
  .section {
    padding: 60px 0;
  }

  .section__title-text {
    font-size: 24px;
  }

  .section__lead {
    font-size: 14px;
    margin-bottom: var(--space-md);
  }
}

/* ============================================
   Spots Section
   ============================================ */
.spots__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

@media (max-width: 1023px) {
  .spots__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .spots__grid {
    grid-template-columns: 1fr;
  }
}

/* Card Component */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.card__image-wrapper {
  position: relative;
  padding-top: 66.67%; /* 3:2 aspect ratio */
  overflow: hidden;
}

.card__image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card__image {
  transform: scale(1.05);
}

.card__content {
  padding: var(--space-md);
}

.card__title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.card__text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ============================================
   Gourmet Section
   ============================================ */
.gourmet {
  background-color: var(--color-white);
  /* Subtle paper texture effect */
  background-image:
    radial-gradient(circle at 20% 80%, rgba(174, 213, 129, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(141, 110, 99, 0.05) 0%, transparent 50%);
}

.gourmet__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.gourmet__item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.gourmet__item--reverse {
  direction: rtl;
}

.gourmet__item--reverse > * {
  direction: ltr;
}

.gourmet__image-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.gourmet__image {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gourmet__image-wrapper:hover .gourmet__image {
  transform: scale(1.05);
}

.gourmet__content {
  padding: var(--space-md);
}

.gourmet__title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  position: relative;
  display: inline-block;
}

.gourmet__title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--color-accent);
}

.gourmet__text {
  color: var(--color-text-light);
  line-height: 1.8;
}

@media (max-width: 767px) {
  .gourmet__item {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .gourmet__item--reverse {
    direction: ltr;
  }

  .gourmet__image {
    height: 200px;
  }

  .gourmet__title {
    font-size: 20px;
  }
}

/* ============================================
   Access Section
   ============================================ */
.access__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.access__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.access__method {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-card);
}

.access__method-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.access__icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.access__method-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.access__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.access__list-item {
  padding-left: var(--space-sm);
  border-left: 3px solid var(--color-secondary);
}

.access__route {
  display: block;
  font-weight: 600;
  color: var(--color-text);
}

.access__time {
  display: block;
  font-size: 15px;
  color: var(--color-primary);
  font-weight: 500;
}

.access__detail {
  display: block;
  font-size: 13px;
  color: var(--color-text-light);
}

.access__map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  min-height: 400px;
}

.access__map iframe {
  width: 100%;
  height: 100%;
  min-height: 400px;
}

@media (max-width: 767px) {
  .access__grid {
    grid-template-columns: 1fr;
  }

  .access__map {
    min-height: 300px;
  }

  .access__map iframe {
    min-height: 300px;
  }
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--color-primary);
  padding: var(--space-md) 0;
  text-align: center;
}

.footer__copy {
  color: var(--color-white);
  font-size: 14px;
}

/* ============================================
   Focus States (Accessibility)
   ============================================ */
a:focus,
button:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   Selection
   ============================================ */
::selection {
  background-color: var(--color-secondary);
  color: var(--color-primary-dark);
}

/* ============================================
   Scroll Offset for Fixed Header
   ============================================ */
#spots,
#gourmet,
#access {
  scroll-margin-top: var(--header-height);
}

@media (max-width: 767px) {
  #spots,
  #gourmet,
  #access {
    scroll-margin-top: var(--header-height-sp);
  }
}