/* ==========================================================================
   Blue Belt Blues - Custom Stylesheet
   ========================================================================== */

/* --- Custom Variables & Theme Tokens --- */
:root {
  --bg-dark-blue: #0a1c3e;      /* Mockup dark sections */
  --bg-dark-secondary: #081630; /* Darker dark for header/footer */
  --bg-dark-input: #12284e;     /* Lighter dark for inputs */
  
  --bg-light: #ffffff;          /* Philosophy background */
  --bg-light-alt: #f3f6fa;      /* Community background */
  --bg-light-card: #ffffff;
  
  --border-light: #e2e8f0;
  --border-dark: rgba(255, 255, 255, 0.08);
  
  /* Primary blue accent */
  --accent-blue: #1e60d8;
  --accent-blue-hover: #164bb0;
  --accent-blue-light: #60a5fa;
  
  /* Text colors on dark */
  --text-dark-primary: #ffffff;
  --text-dark-secondary: #e2e8f0;
  --text-dark-muted: #94a3b8;
  
  /* Text colors on light */
  --text-light-primary: #0a1c3e;
  --text-light-secondary: #334155;
  --text-light-muted: #64748b;
  
  /* Fonts */
  --font-heading: 'Outfit', 'Noto Sans JP', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;
  
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-round: 50px;
  
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.05);
  --shadow-card-dark: 0 15px 35px rgba(0, 0, 0, 0.2);
}

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

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

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-light-primary);
  font-weight: 700;
  line-height: 1.3;
}

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

/* --- Scroll Animation Reveals --- */
.scroll-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition-smooth);
}

.scroll-reveal-up {
  opacity: 0;
  transform: translateY(35px);
  transition: var(--transition-smooth);
}

.scroll-reveal-left {
  opacity: 0;
  transform: translateX(-35px);
  transition: var(--transition-smooth);
}

.scroll-reveal-right {
  opacity: 0;
  transform: translateX(35px);
  transition: var(--transition-smooth);
}

.scroll-reveal.active,
.scroll-reveal-up.active,
.scroll-reveal-left.active,
.scroll-reveal-right.active {
  opacity: 1;
  transform: translate(0, 0);
}

/* --- Utilities --- */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.container-narrow {
  max-width: 650px;
}

.grid {
  display: grid;
  gap: 32px;
}

.grid-2-cols {
  grid-template-columns: 1fr;
}

.grid-3-cols {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-2-cols {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3-cols {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3-cols {
    grid-template-columns: repeat(3, 1fr);
  }
}

.gap-md { gap: 32px; }
.gap-lg { gap: 48px; }

.section-padding {
  padding: 100px 0;
}

.dark-bg {
  background-color: var(--bg-dark-blue);
  color: var(--text-dark-secondary);
}

.dark-bg h1, .dark-bg h2, .dark-bg h3, .dark-bg h4 {
  color: var(--text-dark-primary);
}

.text-center { text-align: center; }
.justify-center { justify-content: center; }
.align-center { align-items: center; }

.section-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--accent-blue);
  margin-bottom: 8px;
}

.dark-bg .section-tag {
  color: var(--accent-blue-light);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.6rem;
  }
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-light-muted);
  max-width: 700px;
  margin: 0 auto 50px auto;
}

.dark-bg .section-subtitle {
  color: var(--text-dark-muted);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-round);
  font-family: var(--font-heading);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-smooth);
}

.btn-primary {
  background-color: var(--accent-blue);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-blue-hover);
  transform: translateY(-2px);
}

.btn-large {
  padding: 14px 40px;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

/* --- Header / Navigation --- */
.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 24px 0;
  transition: var(--transition-smooth);
}

.header-nav.scrolled {
  background: rgba(10, 28, 62, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
  padding: 16px 0;
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: 1px;
}

.nav-links {
  display: none;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
}

.nav-link:hover {
  color: #ffffff;
}

.nav-cta {
  display: none;
}

.nav-cta .btn {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* Mobile Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 16px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.mobile-menu-toggle .bar {
  width: 100%;
  height: 2px;
  background-color: #ffffff;
  transition: var(--transition-fast);
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
    gap: 40px;
  }
  .nav-cta {
    display: block;
  }
  .mobile-menu-toggle {
    display: none;
  }
}

/* Mobile nav active overlay */
@media (max-width: 1023px) {
  .nav-links.active {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-dark-secondary);
    gap: 32px;
    z-index: 999;
  }

  .nav-links.active a {
    font-size: 1.35rem;
    color: #ffffff;
  }

  .mobile-menu-toggle.active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  
  .mobile-menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* --- Hero Section --- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url('images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  padding-top: 120px;
  padding-bottom: 80px;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(10, 28, 62, 0.7) 0%, rgba(10, 28, 62, 0.95) 100%);
}

.hero-container {
  position: relative;
  z-index: 10;
}

/* Logo SVG Style in Hero */
.logo-graphic-wrapper {
  margin-bottom: 40px;
  display: flex;
  justify-content: center;
}

.bbb-logo {
  width: 180px;
  height: auto;
  display: block;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: 0.12em;
  margin-bottom: 32px;
}

.meets-text {
  font-size: 2.2rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  opacity: 0.8;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 5rem;
  }
  .meets-text {
    font-size: 3.2rem;
  }
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto 48px auto;
  line-height: 1.8;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

/* Scroll indicator */
.scroll-down-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.5);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-8px); }
  60% { transform: translateX(-50%) translateY(-4px); }
}

/* --- Philosophy Section (哲学) --- */
.philosophy-intro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 64px;
}

@media (min-width: 768px) {
  .philosophy-intro-grid {
    grid-template-columns: 1fr 2fr;
    align-items: flex-end;
  }
}

.philosophy-header {
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 12px;
}

.philosophy-header .section-title {
  margin-bottom: 0;
}

.text-large {
  font-size: 1.2rem;
  line-height: 1.8;
  color: var(--text-light-primary);
  font-weight: 500;
}

/* Philosophy Card Style */
.phil-card {
  background: var(--bg-light-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: var(--transition-smooth);
}

.phil-card:hover {
  transform: translateY(-4px);
  border-color: #cbd5e1;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
}

.card-num {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent-blue);
  opacity: 0.15;
  margin-bottom: 16px;
  line-height: 1;
}

.phil-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-light-primary);
}

.phil-card p {
  font-size: 0.95rem;
  color: var(--text-light-secondary);
}

/* --- Features Section (特徴) --- */
.feature-item-bbb {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: var(--transition-smooth);
  padding: 10px;
}

.feature-icon-circle {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-round);
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent-blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 20px;
  transition: var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-item-bbb:hover .feature-icon-circle {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-blue);
  transform: scale(1.05);
}

.feature-item-bbb h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-item-bbb p {
  font-size: 0.9rem;
  color: var(--text-dark-muted);
  line-height: 1.6;
}

/* --- Community Section (コミュニティ) --- */
.community-section {
  background-color: var(--bg-light-alt);
}

/* Image Masonry Gallery (Muted B&W as Mockup) */
.community-gallery-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 64px;
}

@media (min-width: 768px) {
  .community-gallery-grid {
    flex-direction: row;
  }
}

.gallery-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.gallery-img-wrapper {
  overflow: hidden;
  border-radius: var(--radius-md);
  position: relative;
  box-shadow: var(--shadow-card);
}

.item-square {
  aspect-ratio: 1 / 1;
}

.item-wide {
  aspect-ratio: 1.6 / 1;
}

.item-tall {
  height: 100%;
  aspect-ratio: 0.75 / 1;
}

@media (max-width: 767px) {
  .item-tall {
    aspect-ratio: 1 / 1;
  }
}

.gallery-img-bbb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.1) brightness(0.9);
  transition: var(--transition-smooth);
}

.gallery-img-wrapper:hover .gallery-img-bbb {
  filter: grayscale(0%) contrast(1.0) brightness(1.0);
  transform: scale(1.04);
}

/* Testimonials (2 columns, white cards) */
.testimonials-container {
  margin-top: 60px;
}

.testimonial-card {
  background: var(--bg-light-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-card);
}

.quote-icon {
  font-size: 1.5rem;
  color: var(--accent-blue);
  opacity: 0.15;
  margin-bottom: 12px;
}

.testimonial-text {
  font-size: 1.05rem;
  color: var(--text-light-primary);
  font-weight: 500;
  margin-bottom: 16px;
  line-height: 1.6;
}

.testimonial-author {
  font-size: 0.85rem;
  color: var(--text-light-muted);
  display: block;
}

/* --- Practice Location Section (練習場所) --- */
.location-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

@media (min-width: 992px) {
  .location-grid {
    grid-template-columns: 1.2fr 1.8fr;
  }
}

.location-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 32px 0;
}

.location-item-bbb {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.loc-bullet {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-round);
  background-color: var(--accent-blue);
  margin-top: 8px;
  flex-shrink: 0;
}

.location-item-bbb h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-light-primary);
}

.location-item-bbb p {
  font-size: 0.95rem;
  color: var(--text-light-secondary);
}

.location-footnote {
  font-size: 0.95rem;
  color: var(--text-light-primary);
  font-weight: 600;
  border-left: 2px solid var(--accent-blue);
  padding-left: 16px;
  margin-top: 32px;
}

/* Vector Styled Map Placeholder */
.map-illustration-card {
  background: #f8fafc;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.map-bg-pattern {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid #f1f5f9;
  height: 300px;
  color: var(--text-light-muted);
  position: relative;
}

.marker {
  cursor: pointer;
  transition: var(--transition-fast);
}

.marker:hover circle:first-child {
  opacity: 0.4;
  r: 16;
}

.marker text {
  font-weight: 700;
  fill: var(--text-light-primary);
  filter: drop-shadow(0px 2px 4px rgba(255, 255, 255, 0.9));
}

.map-controls {
  padding: 12px 8px 0 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light-secondary);
}

/* --- Join Practice Form Section --- */
.contact-form-wrapper-bbb {
  background: var(--bg-dark-secondary);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card-dark);
}

@media (max-width: 576px) {
  .contact-form-wrapper-bbb {
    padding: 24px;
  }
}

.form-grid-bbb {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 24px;
}

.form-group-bbb {
  display: flex;
  flex-direction: column;
}

.form-group-bbb label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark-primary);
  margin-bottom: 8px;
}

.required-bbb {
  color: #f87171;
  margin-left: 4px;
}

.form-group-bbb input[type="text"],
.form-group-bbb input[type="email"],
.form-group-bbb select,
.form-group-bbb textarea {
  background-color: var(--bg-dark-input);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text-dark-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.form-group-bbb input::placeholder,
.form-group-bbb textarea::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.form-group-bbb input:focus,
.form-group-bbb select:focus,
.form-group-bbb textarea:focus {
  outline: none;
  border-color: var(--accent-blue-light);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15);
}

.form-group-bbb select option {
  background-color: var(--bg-dark-secondary);
  color: var(--text-dark-primary);
}

.form-group-bbb textarea {
  resize: vertical;
}

.form-consent-bbb {
  margin-bottom: 32px;
}

.checkbox-container-bbb {
  display: flex;
  align-items: center;
  position: relative;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-dark-secondary);
  user-select: none;
  gap: 12px;
}

.checkbox-container-bbb input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark-bbb {
  height: 18px;
  width: 18px;
  background-color: var(--bg-dark-input);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.checkbox-container-bbb:hover input ~ .checkmark-bbb {
  border-color: rgba(255, 255, 255, 0.2);
}

.checkbox-container-bbb input:checked ~ .checkmark-bbb {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.checkmark-bbb::after {
  content: "";
  display: none;
  width: 4px;
  height: 8px;
  border: solid #ffffff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

.checkbox-container-bbb input:checked ~ .checkmark-bbb::after {
  display: block;
}

.form-group-bbb.is-invalid input,
.form-group-bbb.is-invalid select,
.form-group-bbb.is-invalid textarea {
  border-color: #f87171;
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.15);
}

.form-group-bbb.is-invalid .error-message,
.form-consent-bbb.is-invalid .error-message {
  display: block;
}

.btn-submit-bbb {
  width: 100%;
}

@media (min-width: 768px) {
  .btn-submit-bbb {
    width: auto;
    padding-left: 56px;
    padding-right: 56px;
  }
}

/* --- Footer --- */
.footer {
  background-color: var(--bg-dark-secondary);
  border-top: 1px solid var(--border-dark);
  padding: 60px 0 20px 0;
  color: var(--text-dark-muted);
}

.footer-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .footer-container {
    grid-template-columns: 1.5fr 1fr 1.5fr;
  }
}

.logo-graphic-wrapper-footer {
  display: flex;
}

.bbb-logo-footer {
  width: 110px;
  height: auto;
  display: block;
  opacity: 0.5;
}

.footer-nav h4, .footer-contact h4 {
  font-size: 1rem;
  margin-bottom: 20px;
  font-weight: 700;
  color: var(--text-dark-primary);
  letter-spacing: 0.5px;
}

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

.footer-nav ul li {
  margin-bottom: 12px;
}

.footer-nav ul li a {
  font-size: 0.9rem;
  color: var(--text-dark-muted);
}

.footer-nav ul li a:hover {
  color: #ffffff;
}

.footer-contact p {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.email-contact {
  color: var(--accent-blue-light) !important;
  font-weight: 600;
}

.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding-top: 20px;
}

.bottom-container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

@media (min-width: 768px) {
  .bottom-container {
    flex-direction: row;
  }
}

.copyright {
  font-size: 0.8rem;
}

.bottom-links {
  display: flex;
  gap: 20px;
}

.bottom-links a {
  font-size: 0.8rem;
}

.bottom-links a:hover {
  color: #ffffff;
}

/* --- Success Modal --- */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(10, 28, 62, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 480px;
  background: var(--bg-dark-secondary);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  z-index: 10;
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--text-dark-secondary);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 2rem;
  background: transparent;
  border: none;
  color: var(--text-dark-muted);
  cursor: pointer;
  line-height: 1;
  transition: var(--transition-fast);
}

.modal-close:hover {
  color: #ffffff;
}

.modal-success-icon {
  font-size: 3.5rem;
  color: var(--accent-blue-light);
  margin-bottom: 20px;
}

.modal-body h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
  color: #ffffff;
}

.modal-body p {
  margin-bottom: 12px;
}

.modal-body .modal-desc {
  font-size: 0.9rem;
  color: var(--text-dark-muted);
  margin-bottom: 32px;
  line-height: 1.6;
}

.modal-body button {
  width: 120px;
}