/* =====================================================
   Polymode Inc. - Design System
   ハイテク感のあるダークテーマデザイン
   ===================================================== */

/* ===== CSS Variables ===== */
:root {
  /* Color Palette */
  --color-bg-primary: #0a0e27;
  --color-bg-secondary: #1a1f3a;
  --color-bg-tertiary: #252b4a;

  --color-accent-cyan: #73c3dc;
  --color-accent-purple: #a665ea;
  --color-gradient: linear-gradient(135deg, #73c3dc 0%, #a665ea 100%);
  --color-gradient-hover: linear-gradient(135deg, #84d4ed 0%, #b776fb 100%);

  --color-text-primary: #ffffff;
  --color-text-secondary: #b8c1ec;
  --color-text-muted: #7884a8;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans JP',
                 'Hiragino Sans', sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 3rem;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(115, 195, 220, 0.3);

  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

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

/* 背景にテック感のあるグラデーション */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 20%, rgba(115, 195, 220, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(166, 101, 234, 0.08) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-accent-purple);
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(26, 31, 58, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(115, 195, 220, 0.1);
  z-index: 1000;
  transition: var(--transition-base);
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.navbar-menu a {
  color: var(--color-text-secondary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
}

.navbar-menu a:hover,
.navbar-menu a.active {
  background: rgba(115, 195, 220, 0.1);
  color: var(--color-text-primary);
}

/* Mobile Menu Toggle */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.navbar-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--color-gradient);
  border-radius: 2px;
  transition: var(--transition-base);
}

.navbar-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ===== Container & Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title h2 {
  position: relative;
  display: inline-block;
  padding-bottom: var(--spacing-sm);
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--color-gradient);
  border-radius: 2px;
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: var(--color-gradient);
  opacity: 0.1;
  border-radius: 50%;
  filter: blur(100px);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.1);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  margin-bottom: var(--spacing-md);
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 1s ease;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease 0.2s both;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  animation: fadeInUp 1s ease 0.4s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--color-gradient-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 2px solid transparent;
  background-image:
    linear-gradient(var(--color-bg-primary), var(--color-bg-primary)),
    var(--color-gradient);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  color: var(--color-text-primary);
}

.btn-outline:hover {
  background-image:
    var(--color-gradient),
    var(--color-gradient);
  box-shadow: var(--shadow-glow);
}

.btn-group {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.card-grid.featured {
  grid-template-columns: repeat(2, 1fr);
}

.card.featured {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(115, 195, 220, 0.1) 0%, rgba(166, 101, 234, 0.1) 100%);
  border: 2px solid rgba(115, 195, 220, 0.3);
}

.card.featured .card-icon {
  width: 80px;
  height: 80px;
  font-size: 2.5rem;
}

.card.featured .card-title {
  font-size: var(--font-size-2xl);
}

.card.featured .card-description {
  font-size: var(--font-size-lg);
}

.card {
  background: rgba(26, 31, 58, 0.5);
  border: 1px solid rgba(115, 195, 220, 0.2);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-gradient);
  opacity: 0;
  transition: var(--transition-base);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-cyan);
}

.card:hover::before {
  opacity: 0.05;
}

.card-icon {
  width: 60px;
  height: 60px;
  margin-bottom: var(--spacing-sm);
  background: var(--color-gradient);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  position: relative;
  z-index: 1;
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
  position: relative;
  z-index: 1;
}

.card-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

/* ===== Features Grid ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.feature-item {
  text-align: center;
  padding: var(--spacing-md);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

.feature-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ===== Company Info Table ===== */
.info-table {
  width: 100%;
  max-width: 800px;
  margin: var(--spacing-lg) auto;
  background: rgba(26, 31, 58, 0.5);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.info-table table {
  width: 100%;
  border-collapse: collapse;
}

.info-table th,
.info-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid rgba(115, 195, 220, 0.1);
}

.info-table th {
  background: rgba(115, 195, 220, 0.1);
  color: var(--color-accent-cyan);
  font-weight: 600;
  width: 30%;
}

.info-table td {
  color: var(--color-text-secondary);
}

.info-table tr:last-child th,
.info-table tr:last-child td {
  border-bottom: none;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid rgba(115, 195, 220, 0.1);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

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

.footer-section h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}

.footer-section a:hover {
  color: var(--color-accent-cyan);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(115, 195, 220, 0.1);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  :root {
    --font-size-3xl: 2rem;
    --font-size-2xl: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  .navbar-container {
    padding: var(--spacing-sm);
  }

  .navbar-toggle {
    display: flex;
  }

  .navbar-menu {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    flex-direction: column;
    background: rgba(26, 31, 58, 0.98);
    backdrop-filter: blur(20px);
    transition: max-height var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  .navbar-menu.active {
    max-height: 400px;
    padding: var(--spacing-sm) 0;
  }

  .navbar-menu li {
    width: 100%;
    text-align: center;
  }

  .navbar-menu a {
    display: block;
    padding: var(--spacing-sm);
    width: 100%;
  }

  .hero {
    min-height: 80vh;
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .hero-description br {
    display: none;
  }

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

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

  .card.featured {
    grid-column: span 1;
  }

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

  .info-table th,
  .info-table td {
    display: block;
    width: 100%;
  }

  .info-table th {
    background: rgba(115, 195, 220, 0.15);
    border-bottom: none;
    padding-bottom: var(--spacing-xs);
  }

  .info-table td {
    padding-top: var(--spacing-xs);
    padding-bottom: var(--spacing-md);
  }

  .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }
}

/* ===== Utility Classes ===== */
.text-center {
  text-align: center;
}

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

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.fade-in {
  animation: fadeInUp 0.8s ease;
}