/* =============================================
   ONOKUMA OUTDOOR - Corporate Website
   ============================================= */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "游ゴシック体", YuGothic, "游ゴシック", "Yu Gothic", "ヒラギノ角ゴ Pro", "Hiragino Kaku Gothic Pro", "メイリオ", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #333;
  background-color: #fff;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

a:hover {
  opacity: 0.7;
}

ul {
  list-style: none;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* =============================================
   Header
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: transparent;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 20px;
}

.header__logo img {
  height: 30px;
  width: auto;
}

@media (min-width: 768px) {
  .header__logo img {
    height: 40px;
  }
}

.header__nav {
  display: none;
}

@media (min-width: 768px) {
  .header__nav {
    display: block;
  }
}

.header__nav-list {
  display: flex;
  gap: 30px;
}

.header__nav-list a {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.header.is-scrolled .header__nav-list a {
  color: #333;
  text-shadow: none;
}

/* Mobile Menu Button */
.header__menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 30px;
  height: 30px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

@media (min-width: 768px) {
  .header__menu-btn {
    display: none;
  }
}

.header__menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: #fff;
  transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
}

.header.is-scrolled .header__menu-btn span {
  background-color: #333;
}

.header__menu-btn.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.header__menu-btn.is-active span:nth-child(2) {
  opacity: 0;
}

.header__menu-btn.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Navigation */
.mobile-nav {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.98);
  padding: 20px;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
  z-index: 999;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.mobile-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: center;
}

.mobile-nav__list a {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

/* =============================================
   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('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero__bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.1);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
}

.hero__logo {
  display: flex;
  justify-content: center;
}

.hero__logo-circle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 280px;
  height: 280px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  padding: 30px;
}

@media (min-width: 768px) {
  .hero__logo-circle {
    width: 350px;
    height: 350px;
  }
}

.hero__logo-text-top,
.hero__logo-text-bottom {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

@media (min-width: 768px) {
  .hero__logo-text-top,
  .hero__logo-text-bottom {
    font-size: 16px;
  }
}

.hero__logo-bear {
  margin: 15px 0;
  color: #fff;
}

.hero__logo-bear svg {
  width: 80px;
  height: 80px;
}

@media (min-width: 768px) {
  .hero__logo-bear svg {
    width: 100px;
    height: 100px;
  }
}

/* =============================================
   Section Common Styles
   ============================================= */
.section {
  padding: 80px 0;
}

@media (min-width: 768px) {
  .section {
    padding: 120px 0;
  }
}

.section__title {
  font-size: 24px;
  font-weight: 500;
  text-align: center;
  margin-bottom: 50px;
  letter-spacing: 0.1em;
}

@media (min-width: 768px) {
  .section__title {
    font-size: 32px;
    margin-bottom: 70px;
  }
}

/* =============================================
   About Section
   ============================================= */
.about {
  background-color: #fff;
}

.about__content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

@media (min-width: 768px) {
  .about__content {
    flex-direction: row;
    gap: 60px;
    align-items: center;
  }
}

.about__image {
  flex: 1;
  overflow: hidden;
  border-radius: 8px;
}

.about__image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.about__text {
  flex: 1;
}

.about__text p {
  margin-bottom: 1.5em;
  font-size: 15px;
  line-height: 2;
}

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

.about__tagline {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid #eee;
  font-style: italic;
  color: #666;
}

.about__tagline strong {
  display: block;
  margin-top: 10px;
  font-style: normal;
  font-size: 18px;
  color: #333;
  letter-spacing: 0.15em;
}

/* =============================================
   Product Section
   ============================================= */
.product {
  background-color: #f9f9f9;
}

.product__content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

@media (min-width: 768px) {
  .product__content {
    flex-direction: row;
    gap: 60px;
    align-items: flex-start;
  }
}

.product__image {
  flex: 1;
  position: relative;
  max-width: 400px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .product__image {
    margin: 0;
  }
}

.product__image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.product__badge {
  position: absolute;
  top: 15px;
  right: 15px;
  background-color: #666;
  color: #fff;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 4px;
  letter-spacing: 0.1em;
}

.product__info {
  flex: 1;
}

.product__logo {
  max-width: 200px;
  margin-bottom: 30px;
}

.product__logo img {
  border-radius: 8px;
}

.product__name {
  font-size: 24px;
  font-weight: 500;
  margin-bottom: 20px;
  letter-spacing: 0.1em;
}

.product__description {
  font-size: 15px;
  line-height: 2;
  margin-bottom: 1em;
  color: #555;
}

.product__notice {
  margin-top: 30px;
  padding: 20px;
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
}

.product__notice p {
  font-size: 14px;
  color: #666;
  text-align: center;
  line-height: 1.8;
}

/* =============================================
   SNS Section
   ============================================= */
.sns {
  background-color: #fff;
}

.sns__lead {
  text-align: center;
  font-size: 16px;
  margin-bottom: 40px;
  color: #666;
}

.sns__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: 600px;
  margin: 0 auto;
}

@media (min-width: 500px) {
  .sns__links {
    grid-template-columns: repeat(2, 1fr);
  }
}

.sns__link {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 20px;
  background-color: #f9f9f9;
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sns__link:hover {
  opacity: 1;
  transform: translateY(-3px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.sns__icon {
  flex-shrink: 0;
}

.sns__link--instagram .sns__icon {
  color: #E4405F;
}

.sns__link--facebook .sns__icon {
  color: #1877F2;
}

.sns__link--twitter .sns__icon {
  color: #000;
}

.sns__link-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.sns__link-text strong {
  font-size: 14px;
  font-weight: 600;
}

.sns__link-text small {
  font-size: 12px;
  color: #888;
}

/* =============================================
   Footer
   ============================================= */
.footer {
  position: relative;
  color: #fff;
}

.footer__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../images/footer-bg.jpg');
  background-size: cover;
  background-position: center;
}

.footer__bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
}

.footer__content {
  position: relative;
  z-index: 1;
  padding: 60px 0 30px;
  text-align: center;
}

.footer__info {
  margin-bottom: 30px;
}

.footer__company {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 10px;
  letter-spacing: 0.1em;
}

.footer__contact {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

.footer__sns {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 30px;
}

.footer__sns a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background-color 0.3s ease;
}

.footer__sns a:hover {
  opacity: 1;
  background-color: rgba(255, 255, 255, 0.2);
}

.footer__copyright {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.05em;
}

/* =============================================
   Utility Classes
   ============================================= */
.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;
}

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

.hero__content {
  animation: fadeIn 1s ease-out;
}