/* ============================================
   SYMMETRY Lab - Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #1B2A4A;
  --color-primary-light: #2C4270;
  --color-accent: #00B4D8;
  --color-accent-hover: #0096B7;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F7FA;
  --color-text: #333333;
  --color-text-light: #6B7280;
  --color-border: #E5E7EB;
  --color-white: #FFFFFF;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Meiryo", sans-serif;
  --max-width: 1100px;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.12);
  --transition: 0.3s ease;
}

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

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

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
}

.text-accent { color: var(--color-accent); }
.text-light { color: var(--color-text-light); }
.text-center { text-align: center; }
.text-small { font-size: 0.875rem; }

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-dark {
  background: var(--color-primary);
  color: var(--color-white);
}

.section-dark h2,
.section-dark h3 {
  color: var(--color-white);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header p {
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0.5rem auto 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* --- Navigation --- */
.navbar {
  position: sticky;
  top: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  padding: 0 1.5rem;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo:hover {
  color: var(--color-primary);
}

.nav-logo span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 400;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--color-accent);
}

.nav-links .btn-primary {
  color: var(--color-white);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  margin: 5px 0;
  transition: var(--transition);
}

/* --- Buttons --- */
.btn-primary {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid var(--color-accent);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-white);
}

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--color-accent);
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid var(--color-accent);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

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

.btn-outline-white {
  display: inline-block;
  background: transparent;
  color: var(--color-white);
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid var(--color-white);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

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

.btn-white {
  display: inline-block;
  background: var(--color-white);
  color: var(--color-primary);
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid var(--color-white);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

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

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --- Cards --- */
.card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-bg-alt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.card-accent {
  border-top: 3px solid var(--color-accent);
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: rgba(0, 180, 216, 0.08);
  border-radius: 50%;
}

.hero h1 {
  color: var(--color-white);
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
  position: relative;
  z-index: 1;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

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

/* --- Feature/Strength Section --- */
.strength-item {
  text-align: center;
  padding: 1.5rem;
}

.strength-icon {
  width: 64px;
  height: 64px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.75rem;
}

/* --- Service Cards --- */
.service-card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.service-card-header {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 1.5rem 2rem;
}

.service-card-header h3 {
  color: var(--color-white);
  margin-bottom: 0.25rem;
}

.service-card-body {
  padding: 2rem;
}

.service-card-body ul {
  margin-bottom: 1.5rem;
}

.service-card-body li {
  padding: 0.4rem 0;
  padding-left: 1.5rem;
  position: relative;
}

.service-card-body li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  position: absolute;
  left: 0;
}

/* --- Testimonials --- */
.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  position: relative;
}

.testimonial-card::before {
  content: "\201C";
  font-size: 4rem;
  color: var(--color-accent);
  opacity: 0.2;
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  line-height: 1;
}

.testimonial-text {
  font-style: italic;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  background: var(--color-bg-alt);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.875rem;
}

.testimonial-info {
  font-size: 0.875rem;
}

.testimonial-info strong {
  display: block;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  color: var(--color-white);
  text-align: center;
  padding: 60px 0;
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.cta-banner p {
  opacity: 0.9;
  margin-bottom: 1.5rem;
}

/* --- Day Program --- */
.day-program {
  margin-bottom: 2.5rem;
}

.day-badge {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 0.25rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

/* --- Price Table --- */
.price-card {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}

.price-card.featured {
  border-color: var(--color-accent);
  position: relative;
}

.price-card.featured::before {
  content: "おすすめ";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-white);
  padding: 0.15rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
}

.price-amount {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 1rem 0;
}

.price-amount span {
  font-size: 1rem;
  font-weight: 400;
}

/* --- FAQ Accordion --- */
.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item summary {
  padding: 1.25rem 0;
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--color-accent);
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  padding-bottom: 1.25rem;
  color: var(--color-text-light);
}

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

.info-table th,
.info-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

.info-table th {
  background: var(--color-bg-alt);
  color: var(--color-primary);
  font-weight: 700;
  width: 30%;
  white-space: nowrap;
}

/* --- Forms --- */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
  font-size: 0.9rem;
}

.form-group label .required {
  color: #EF4444;
  font-size: 0.8rem;
  margin-left: 0.25rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* --- Booking Cards --- */
.booking-card {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  cursor: pointer;
  transition: all var(--transition);
}

.booking-card:hover,
.booking-card.selected {
  border-color: var(--color-accent);
  box-shadow: var(--shadow);
}

.booking-card h3 {
  margin-bottom: 0.5rem;
}

.booking-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}

/* --- Blog Card --- */
.blog-card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.blog-card:hover {
  box-shadow: var(--shadow-lg);
}

.blog-card-img {
  width: 100%;
  height: 200px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
}

.blog-card-body {
  padding: 1.5rem;
}

.blog-card-date {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
}

.blog-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.blog-card-body h3 a {
  color: var(--color-primary);
}

.blog-card-body h3 a:hover {
  color: var(--color-accent);
}

/* --- Instructor --- */
.instructor-profile {
  display: flex;
  gap: 3rem;
  align-items: flex-start;
}

.instructor-avatar {
  width: 200px;
  height: 200px;
  background: var(--color-bg-alt);
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-text-light);
}

.instructor-info h2 {
  margin-bottom: 0.25rem;
}

.instructor-title {
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 1rem;
}

.credential-list li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

.credential-list li::before {
  content: "●";
  color: var(--color-accent);
  position: absolute;
  left: 0;
  font-size: 0.5rem;
  top: 0.85rem;
}

/* --- Footer --- */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer h4 {
  color: var(--color-white);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.footer-brand span {
  color: var(--color-accent);
}

.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  padding: 0.3rem 0;
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
}

/* --- Page Header --- */
.page-header {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 48px 0;
  text-align: center;
}

.page-header h1 {
  color: var(--color-white);
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  opacity: 0.8;
}

/* --- Breadcrumb --- */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.breadcrumb a {
  color: var(--color-text-light);
}

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

/* --- Alert / Notice --- */
.alert {
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}

.alert-success {
  background: #ECFDF5;
  color: #065F46;
  border: 1px solid #A7F3D0;
}

.alert-warning {
  background: #FFFBEB;
  color: #92400E;
  border: 1px solid #FDE68A;
}

/* --- Scroll Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.4rem; }

  .section {
    padding: 48px 0;
  }

  .hero {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

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

  /* Mobile Nav */
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 1rem 1.5rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
    gap: 0.75rem;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: 0.5rem 0;
    width: 100%;
  }

  .instructor-profile {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .instructor-avatar {
    width: 150px;
    height: 150px;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn-primary,
  .btn-group .btn-outline,
  .btn-group .btn-outline-white,
  .btn-group .btn-white {
    width: 100%;
    text-align: center;
  }

  .info-table th {
    width: 35%;
  }
}