/* ==========================================
   株式会社ホート(HAUT) - モダンデザインシステム
   洗練されたターコイズブルーのコーポレートサイト
   ========================================== */

/* ==================== カラーシステム ==================== */
:root {
  /* ターコイズブルー */
  --primary-turquoise: #00BCD4;
  --primary-turquoise-dark: #00ACC1;
  --primary-turquoise-light: #26C6DA;
  --primary-turquoise-lighter: #B2EBF2;
  --primary-turquoise-pale: #E0F7FA;
  
  /* グラデーション */
  --gradient-turquoise: linear-gradient(135deg, #00BCD4 0%, #00ACC1 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(0, 188, 212, 0.95) 0%, rgba(0, 172, 193, 0.95) 100%);
  
  /* ニュートラル */
  --white: #FFFFFF;
  --off-white: #FAFAFA;
  --light-gray: #F5F5F5;
  --gray: #E0E0E0;
  --dark-gray: #424242;
  --charcoal: #212121;
  --black: #000000;
  
  /* テキスト */
  --text-primary: #212121;
  --text-secondary: #616161;
  --text-tertiary: #9E9E9E;
  
  /* スペーシング */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-xxl: 8rem;
  
  /* タイポグラフィ */
  --font-primary: 'Inter', 'Noto Sans JP', sans-serif;
  
  /* シャドウ */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --shadow-turquoise: 0 4px 20px rgba(0, 188, 212, 0.3);
  
  /* トランジション */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* ボーダー */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* ==================== リセット ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  background-color: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.loading {
  overflow: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

/* ==================== ローディング画面 ==================== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-screen.hidden .loading-logo {
  animation: logoExit 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.loading-logo {
  width: 200px;
  height: auto;
  animation: logoEntrance 1.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes logoEntrance {
  0% {
    opacity: 0;
    transform: scale(0.3) rotate(-180deg);
  }
  50% {
    transform: scale(1.1) rotate(10deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

@keyframes logoExit {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.2);
  }
}

/* ==================== ヘッダー ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: background-color 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
  padding: 0.75rem 0;
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  padding: 0.75rem 0;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.logo {
  display: flex;
  align-items: center;
  transition: var(--transition-normal);
}

.logo:hover {
  transform: scale(1.05);
}

.logo-image {
  height: 55px;
  width: auto;
}

.header.scrolled .logo-image {
  height: 50px;
}

/* ==================== ナビゲーション ==================== */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: 0.5rem 0;
  position: relative;
  transition: var(--transition-fast);
  letter-spacing: 0.02em;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-turquoise);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.header:not(.scrolled) .nav-link:hover {
  color: rgba(255, 255, 255, 0.8);
}

.header.scrolled .nav-link:hover {
  color: var(--primary-turquoise);
}

/* ドロップダウン */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  cursor: pointer;
}

.dropdown-toggle::after {
  content: '▼';
  font-size: 0.7rem;
  transition: transform var(--transition-fast);
}

.dropdown:hover .dropdown-toggle::after {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 1rem);
  left: 0;
  background: var(--white);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  min-width: 220px;
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
  list-style: none;
  padding-left: 0;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  display: block;
}

.dropdown-item:hover {
  background: var(--primary-turquoise-pale);
  color: var(--primary-turquoise);
}

/* モバイルメニュー */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.5rem;
  cursor: pointer;
  z-index: 1001;
}

.mobile-menu-btn span {
  width: 26px;
  height: 2px;
  background: var(--white);
  transition: var(--transition-fast);
  border-radius: 2px;
}

.header.scrolled .mobile-menu-btn span {
  background: var(--text-primary);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ==================== ヒーローセクション ==================== */
.hero-fullscreen {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-background img,
.hero-background video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-overlay);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  max-width: 1000px;
  padding: 0 var(--spacing-md);
  padding-top: 60px;
  animation: fadeInUp 1.2s ease 0.5s both;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 400;
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
  opacity: 0.95;
}

.hero-scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.hero-scroll-text {
  font-size: 0.85rem;
  color: var(--white);
  opacity: 0.8;
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-scroll-icon {
  width: 30px;
  height: 50px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 25px;
  position: relative;
  margin: 0 auto;
}

.hero-scroll-icon::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: var(--white);
  border-radius: 50%;
  animation: scroll 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@keyframes scroll {
  0% {
    opacity: 1;
    top: 10px;
  }
  100% {
    opacity: 0;
    top: 30px;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==================== セクション ==================== */
.section {
  padding: var(--spacing-xxl) 0;
}

.section-sm {
  padding: var(--spacing-xl) 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.section-title span {
  background: var(--gradient-turquoise);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ==================== ボタン ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.2rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--gradient-turquoise);
  color: var(--white);
  box-shadow: var(--shadow-turquoise);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 30px rgba(0, 188, 212, 0.4);
}

.btn-secondary {
  background: var(--white);
  color: var(--primary-turquoise);
  border: 2px solid var(--white);
}

.btn-secondary:hover {
  background: transparent;
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--primary-turquoise);
  border: 2px solid var(--primary-turquoise);
}

.btn-outline:hover {
  background: var(--primary-turquoise);
  color: var(--white);
}

/* ==================== カード ==================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 260px;
  overflow: hidden;
  position: relative;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card-image img {
  transform: scale(1.1);
}

.card-content {
  padding: var(--spacing-md);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.card-link {
  color: var(--primary-turquoise);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
}

.card-link:hover {
  gap: 0.75rem;
}

/* ==================== フッター ==================== */
.footer {
  background: var(--charcoal);
  color: var(--white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  font-size: 1.2rem;
}

.footer-link {
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition-fast);
  display: block;
  padding: 0.3rem 0;
}

.footer-link:hover {
  color: var(--primary-turquoise-light);
  padding-left: 0.5rem;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* ==================== レスポンシブ ==================== */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-md);
    transform: translateX(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav.active {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: 1.5rem;
    font-size: 1.2rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--gray);
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: var(--light-gray);
    margin-top: 0;
    display: none;
  }

  .dropdown.active .dropdown-menu {
    display: block;
  }

  .logo-image {
    height: 45px;
  }

  .hero-content {
    padding-top: 40px;
  }

  .section {
    padding: var(--spacing-lg) 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}