@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Outfit:wght@300;400;500;600;700&display=swap');

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

:root {
  /* Color Palette (Warm Future Lab Concept) */
  --color-bg-dark: hsl(24, 16%, 7%);
  --color-bg-light: hsl(24, 20%, 98%);
  
  --color-bg-gradient: radial-gradient(circle at 0% 0%, hsl(20, 30%, 15%) 0%, transparent 50%),
                       radial-gradient(circle at 100% 100%, hsl(35, 25%, 12%) 0%, transparent 60%),
                       hsl(24, 16%, 7%);

  --color-text-primary: hsl(36, 30%, 96%);
  --color-text-secondary: hsl(24, 12%, 78%);
  --color-text-muted: hsl(24, 8%, 55%);
  
  /* Primary Interactive Colors */
  --color-accent-amber: hsl(30, 95%, 62%);
  --color-accent-coral: hsl(12, 90%, 65%);
  --color-accent-peach: hsl(20, 90%, 75%);
  --color-accent-mint: hsl(150, 45%, 70%); /* Soft warm mint for subtle accents */

  --color-accent-amber-glow: hsla(30, 95%, 62%, 0.15);
  --color-accent-coral-glow: hsla(12, 90%, 65%, 0.15);

  /* Glassmorphism Tokens */
  --glass-bg: hsla(24, 15%, 12%, 0.55);
  --glass-bg-hover: hsla(24, 15%, 16%, 0.7);
  --glass-border: hsla(30, 20%, 80%, 0.08);
  --glass-border-hover: hsla(30, 90%, 70%, 0.25);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

  /* Fonts */
  --font-family: 'Outfit', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Layout and Transitions */
  --transition-normal: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
  
  --border-radius-xl: 32px;
  --border-radius-lg: 24px;
  --border-radius-md: 16px;
  --border-radius-sm: 8px;
}

/* Light Mode System Support (Optional system-level toggle fallback) */
@media (prefers-color-scheme: light) {
  /* If the user prefers light scheme, keep a warm cream laboratory theme */
  :root {
    --color-bg-gradient: radial-gradient(circle at 0% 0%, hsl(20, 40%, 94%) 0%, transparent 50%),
                         radial-gradient(circle at 100% 100%, hsl(35, 40%, 92%) 0%, transparent 60%),
                         hsl(24, 20%, 98%);
    --color-text-primary: hsl(24, 30%, 15%);
    --color-text-secondary: hsl(24, 15%, 35%);
    --color-text-muted: hsl(24, 10%, 55%);
    
    --glass-bg: hsla(24, 40%, 95%, 0.7);
    --glass-bg-hover: hsla(24, 40%, 98%, 0.85);
    --glass-border: hsla(24, 20%, 20%, 0.08);
    --glass-border-hover: hsla(20, 90%, 60%, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(120, 90, 80, 0.08);
  }
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg-gradient);
  color: var(--color-text-primary);
  min-height: 100dvh;
  line-height: 1.6;
  overflow-x: hidden;
  max-width: 100%;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg-dark);
}
::-webkit-scrollbar-thumb {
  background: hsla(24, 15%, 25%, 1);
  border-radius: var(--border-radius-sm);
  border: 2px solid var(--color-bg-dark);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-amber);
}

/* Accessible Focus States */
:focus-visible {
  outline: 2px solid var(--color-accent-amber);
  outline-offset: 4px;
}

/* --- Layout Utility Classes --- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.desktop-only {
  display: inline;
}

@media (max-width: 768px) {
  .desktop-only {
    display: none;
  }
}

/* --- Decorative Ambient Lights (Laboratory Glow) --- */
.glow-container {
  position: fixed; /* Lock to viewport permanently */
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
  pointer-events: none;
}

.ambient-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.18;
  mix-blend-mode: plus-lighter;
}

.ambient-glow-1 {
  top: -10%;
  left: 10%;
  background: var(--color-accent-amber);
}

.ambient-glow-2 {
  top: 40%;
  right: -10%;
  background: var(--color-accent-coral);
}

.ambient-glow-3 {
  bottom: -10%;
  left: 20%;
  background: var(--color-accent-peach);
}

/* --- Header --- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: 16px 0;
  background: hsla(24, 16%, 7%, 0.15);
  transition: var(--transition-normal);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-coral), var(--color-accent-amber));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--color-accent-coral-glow);
}

.brand-icon svg {
  fill: #fff;
  width: 18px;
  height: 18px;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, var(--color-text-primary), var(--color-accent-peach));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 12px;
  background: hsla(30, 95%, 62%, 0.15);
  color: var(--color-accent-amber);
  border: 1px solid hsla(30, 95%, 62%, 0.25);
  letter-spacing: 0.05em;
}

/* --- Hero Section --- */
.hero {
  padding: 80px 0 60px 0;
  text-align: center;
  position: relative;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent-peach);
  margin-bottom: 24px;
  padding: 6px 16px;
  background: hsla(20, 90%, 75%, 0.08);
  border: 1px solid hsla(20, 90%, 75%, 0.15);
  border-radius: 100px;
}

.hero-title {
  font-size: clamp(2.25rem, 1.2rem + 4.5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
  text-wrap: balance;
}

.hero-title span {
  background: linear-gradient(135deg, var(--color-accent-amber) 0%, var(--color-accent-coral) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.2rem);
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto;
  text-wrap: pretty;
  margin-bottom: 40px;
}

/* --- Services Section --- */
.services {
  padding: 40px 0 80px 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.service-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top right, hsla(30, 95%, 62%, 0.05), transparent 60%);
  opacity: 0;
  transition: var(--transition-normal);
  pointer-events: none;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border-hover);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.service-card:hover::before {
  opacity: 1;
}

/* Agenda Card Color Variance */
.service-card.agenda:hover {
  box-shadow: 0 16px 40px var(--color-accent-amber-glow);
}

/* Marukatsu Card Color Variance */
.service-card.marukatsu {
  background: var(--glass-bg);
}

.service-card.marukatsu::before {
  background: radial-gradient(circle at top right, hsla(12, 90%, 65%, 0.05), transparent 60%);
}

.service-card.marukatsu:hover {
  box-shadow: 0 16px 40px var(--color-accent-coral-glow);
}

.card-header {
  margin-bottom: 24px;
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.agenda .service-icon {
  background: hsla(30, 95%, 62%, 0.1);
  border: 1px solid hsla(30, 95%, 62%, 0.2);
  color: var(--color-accent-amber);
}

.marukatsu .service-icon {
  background: hsla(12, 90%, 65%, 0.1);
  border: 1px solid hsla(12, 90%, 65%, 0.2);
  color: var(--color-accent-coral);
}

.service-icon svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.card-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-tagline {
  font-size: 0.95rem;
  color: var(--color-accent-peach);
  font-weight: 500;
  margin-bottom: 16px;
}

.card-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  text-wrap: pretty;
}

.card-footer {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--border-radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid transparent;
  min-height: 48px; /* Touch target */
}

.btn-primary {
  color: hsl(24, 16%, 7%);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.agenda .btn-primary {
  background: var(--color-accent-amber);
}

.agenda .btn-primary:hover {
  background: hsl(30, 95%, 68%);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px hsla(30, 95%, 62%, 0.35);
}

.marukatsu .btn-primary {
  background: var(--color-accent-coral);
  color: #fff;
}

.marukatsu .btn-primary:hover {
  background: hsl(12, 90%, 70%);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px hsla(12, 90%, 65%, 0.35);
}

.btn-secondary {
  background: hsla(24, 20%, 90%, 0.05);
  color: var(--color-text-primary);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: hsla(24, 20%, 90%, 0.1);
  border-color: var(--color-text-muted);
}

/* --- Inquiry Section --- */
.inquiry {
  padding: 80px 0 100px 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px auto;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  background: linear-gradient(to right, #fff, var(--color-accent-peach));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  color: var(--color-text-secondary);
}

.inquiry-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-xl);
  padding: 32px;
  box-shadow: var(--glass-shadow);
}

/* Tabs */
.tabs {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 16px;
  margin-bottom: 32px;
  overflow-x: auto;
  scrollbar-width: none; /* Hide scrollbar for tabs */
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-family: var(--font-family);
  font-size: 1.1rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
}

.tab-btn:hover {
  color: var(--color-text-primary);
  background: hsla(24, 20%, 90%, 0.05);
}

.tab-btn.active {
  color: var(--color-text-primary);
  background: hsla(30, 95%, 62%, 0.1);
  box-shadow: inset 0 0 0 1px hsla(30, 95%, 62%, 0.25);
}

.tab-btn[data-tab="marukatsu"].active {
  background: hsla(12, 90%, 65%, 0.1);
  box-shadow: inset 0 0 0 1px hsla(12, 90%, 65%, 0.25);
}

.tab-btn .tab-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

/* Tab Panel Content */
.tab-content {
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.tab-content.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.iframe-container {
  width: 100%;
  max-width: 100%;
  height: 600px;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--glass-border);
  overflow: hidden;
  position: relative;
  background: hsla(24, 15%, 8%, 0.4);
}

/* Loading skeleton for iframes */
.iframe-loading {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 16px;
  background: hsl(24, 16%, 10%);
  color: var(--color-text-secondary);
  transition: opacity 0.5s ease;
  z-index: 10;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid hsla(30, 95%, 62%, 0.1);
  border-top-color: var(--color-accent-amber);
  border-radius: 50%;
  animation: spin 1s infinite linear;
}

.marukatsu-spinner {
  border-top-color: var(--color-accent-coral);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.inquiry-iframe {
  width: 1px;
  min-width: 100%;
  *width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* --- Footer --- */
.app-footer {
  border-top: 1px solid var(--glass-border);
  padding: 60px 0;
  background: hsla(24, 16%, 5%, 0.6);
  color: var(--color-text-muted);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text-primary);
}

.copyright {
  font-size: 0.8rem;
  margin-top: 16px;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 60px 0 40px 0;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .service-card {
    padding: 30px;
  }

  .inquiry-card {
    padding: 24px;
  }

  .iframe-container {
    height: 500px;
  }

  /* Scale down glowing ambient bubbles on mobile to fit client viewport */
  .ambient-glow {
    width: 260px;
    height: 260px;
    filter: blur(60px);
  }
}

@media (max-width: 480px) {
  .header-container {
    flex-wrap: wrap;
    gap: 8px;
  }

  .app-header .btn {
    padding: 6px 12px;
    font-size: 0.8rem;
    min-height: auto;
  }

  .brand-name {
    font-size: 1.1rem;
  }
  
  .brand-badge {
    display: none;
  }

  .hero-tag {
    font-size: 0.75rem;
    padding: 6px 12px;
  }

  .hero-title {
    margin-bottom: 16px;
  }

  .hero-desc {
    margin-bottom: 28px;
    font-size: 0.95rem;
    padding: 0 16px;
  }

  .card-title {
    font-size: 1.4rem;
  }

  .service-card {
    padding: 24px 16px;
  }

  .inquiry-card {
    padding: 16px 12px;
  }

  .tabs {
    gap: 6px;
    padding-bottom: 12px;
    margin-bottom: 24px;
  }

  .tab-btn {
    flex: 1;
    justify-content: center;
    font-size: 0.825rem;
    padding: 10px 6px;
    border-radius: var(--border-radius-sm);
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.95rem;
  }
}

@media (max-width: 360px) {
  .brand-name {
    font-size: 0.95rem;
  }

  .app-header .btn {
    padding: 6px 10px;
    font-size: 0.75rem;
  }
}

/* Reduce Motion Media Query */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    background-attachment: initial !important;
    scroll-behavior: auto !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
  }
  
  .service-card:hover {
    transform: none !important;
  }
}