/* ============================================
   Guild Code - Main Stylesheet
   トンマナ: yokusuru-inc.com に準拠
   Primary: #429495 / Sub: #6EBFB7 / BG: #fff
============================================ */

/* ---------- Root Variables ---------- */
:root {
  --color-primary: #429495;
  --color-primary-light: #6EBFB7;
  --color-primary-dark: #2f7374;
  --color-text: #1a1a1a;
  --color-text-muted: #888;
  --color-bg: #ffffff;
  --color-bg-gray: #f7f8f8;
  --color-border: #e8ecec;
  --font-serif: 'Noto Serif JP', serif;
  --font-sans: 'Noto Sans JP', sans-serif;
  --radius-btn: 15px;
  --transition: 0.3s ease;
  --shadow: 0 4px 24px rgba(66, 148, 149, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  overflow-x: hidden;
}

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

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

a:hover {
  opacity: 0.75;
}

ul {
  list-style: none;
  padding: 0;
}

/* ---------- Container ---------- */
.gc-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 5%;
}

/* ---------- Buttons ---------- */
.gc-btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-sans);
  font-weight: 700;
  border-radius: var(--radius-btn);
  padding: 0.85em 2em;
  cursor: pointer;
  border: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-align: center;
}

.gc-btn:hover {
  background: var(--color-primary-dark);
  opacity: 1;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.gc-btn--sm {
  padding: 0.5em 1.2em;
  font-size: 0.875rem;
}

.gc-btn--lg {
  padding: 1.1em 2.8em;
  font-size: 1.1rem;
}

.gc-btn--full {
  width: 100%;
  display: block;
}

.gc-btn--white {
  background: #fff;
  color: var(--color-primary);
}

.gc-btn--white:hover {
  background: #f0f9f9;
  color: var(--color-primary-dark);
}

/* ---------- Section Base ---------- */
.gc-section {
  padding: 100px 0;
}

.gc-section__header {
  text-align: center;
  margin-bottom: 60px;
}

.gc-section__label {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.gc-section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-text);
}

.gc-section__desc {
  margin-top: 16px;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.9;
}

/* ============================================
   HEADER
============================================ */
.gc-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.gc-header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.gc-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 5%;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gc-header__logo {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.gc-header__nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.gc-header__nav a:not(.gc-btn) {
  color: var(--color-text);
  font-weight: 400;
}

.gc-header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.gc-header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

.gc-header__mobile-nav {
  display: none;
  flex-direction: column;
  padding: 16px 5%;
  border-top: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.98);
  gap: 12px;
}

.gc-header__mobile-nav.active {
  display: flex;
}

.mobile-nav-link {
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

/* ============================================
   HERO
============================================ */
.gc-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0d2b2b 0%, #1a4a4a 50%, #0d2b2b 100%);
  overflow: hidden;
  text-align: center;
}

.gc-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(66,148,149,0.3) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 30%, rgba(110,191,183,0.2) 0%, transparent 50%);
}

.gc-hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 30, 30, 0.4);
}

.gc-hero__content {
  position: relative;
  z-index: 1;
  padding: 120px 5% 80px;
  max-width: 900px;
}

.gc-hero__tagline {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-primary-light);
  margin-bottom: 20px;
  text-transform: uppercase;
}

.gc-hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 7vw, 4.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 28px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.gc-hero__sub {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.85);
  line-height: 2;
  margin-bottom: 32px;
}

.gc-hero__meta {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.gc-hero__meta span {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  background: rgba(66,148,149,0.3);
  border: 1px solid rgba(110,191,183,0.5);
  color: var(--color-primary-light);
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

.gc-hero__note {
  margin-top: 16px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-sans);
}

/* ============================================
   PAIN POINTS
============================================ */
.gc-pain {
  background: var(--color-bg-gray);
}

.gc-pain__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 60px;
}

.gc-pain__item {
  background: #fff;
  border-radius: 12px;
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.gc-pain__item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.gc-pain__icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
}

.gc-pain__item p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text);
}

.gc-pain__message {
  background: var(--color-primary);
  color: #fff;
  border-radius: 16px;
  padding: 40px 48px;
  text-align: center;
  font-size: 1.05rem;
  line-height: 2;
}

.gc-pain__message strong {
  font-weight: 700;
}

/* ============================================
   REASONS
============================================ */
.gc-reasons {
  background: var(--color-bg);
}

.gc-reasons__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.gc-reason {
  padding: 40px 32px;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

.gc-reason:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.gc-reason__number {
  font-family: var(--font-sans);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary-light);
  opacity: 0.5;
  line-height: 1;
  margin-bottom: 16px;
}

.gc-reason__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.6;
}

.gc-reason__text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.9;
}

/* ============================================
   FLOW
============================================ */
.gc-flow {
  background: var(--color-bg-gray);
}

.gc-flow__steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 700px;
  margin: 0 auto;
}

.gc-flow__step {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 36px 40px;
  position: relative;
}

.gc-flow__step--goal {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.gc-flow__step--goal .gc-flow__step-period,
.gc-flow__step--goal .gc-flow__step-text {
  color: rgba(255,255,255,0.85);
}

.gc-flow__step-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.gc-flow__step-num {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  background: rgba(66,148,149,0.1);
  padding: 3px 10px;
  border-radius: 999px;
}

.gc-flow__step--goal .gc-flow__step-num {
  background: rgba(255,255,255,0.25);
  color: #fff;
}

.gc-flow__step-period {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.gc-flow__step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.gc-flow__step-text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.9;
}

.gc-flow__connector {
  width: 2px;
  height: 40px;
  background: var(--color-primary-light);
  margin: 0 auto;
  opacity: 0.5;
}

/* ============================================
   CURRICULUM
============================================ */
.gc-curriculum {
  background: var(--color-bg);
}

.gc-curriculum__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.gc-curriculum__card {
  background: var(--color-bg-gray);
  border-radius: 16px;
  padding: 32px 24px;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.gc-curriculum__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.gc-curriculum__icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.gc-curriculum__card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-primary-dark);
}

.gc-curriculum__card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.gc-curriculum__card li {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding-left: 12px;
  position: relative;
}

.gc-curriculum__card li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* ============================================
   PRICE
============================================ */
.gc-price {
  background: var(--color-bg-gray);
}

.gc-price__card {
  background: #fff;
  border-radius: 20px;
  border: 2px solid var(--color-primary);
  overflow: hidden;
  max-width: 680px;
  margin: 0 auto 48px;
  box-shadow: var(--shadow);
}

.gc-price__main {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  padding: 40px 32px;
}

.gc-price__label {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  opacity: 0.8;
  margin-bottom: 8px;
}

.gc-price__amount {
  font-family: var(--font-sans);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
}

.gc-price__amount span {
  font-size: 1.2rem;
  font-weight: 400;
}

.gc-price__period {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-top: 8px;
  font-family: var(--font-sans);
}

.gc-price__detail {
  padding: 32px;
  border-bottom: 1px solid var(--color-border);
}

.gc-price__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.gc-price__row:last-child {
  border-bottom: none;
}

.gc-price__free-badge {
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
}

.gc-price__total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0 0;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary-dark);
}

.gc-price__includes {
  padding: 32px;
}

.gc-price__includes-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.gc-price__includes li {
  font-size: 0.9rem;
  padding: 6px 0;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.gc-price__includes li:last-child {
  border-bottom: none;
}

/* Compare */
.gc-price__compare {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.gc-price__compare-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.gc-price__compare-grid {
  display: flex;
  align-items: center;
  gap: 20px;
}

.gc-price__compare-item {
  flex: 1;
  padding: 28px 20px;
  border-radius: 16px;
  border: 1px solid var(--color-border);
}

.gc-price__compare-item--guild {
  border-color: var(--color-primary);
  background: rgba(66,148,149,0.05);
}

.gc-price__compare-name {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text-muted);
}

.gc-price__compare-item--guild .gc-price__compare-name {
  color: var(--color-primary);
}

.gc-price__compare-price {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.gc-price__compare-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.gc-price__compare-vs {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* ============================================
   INSTRUCTOR
============================================ */
.gc-instructor {
  background: var(--color-bg);
}

.gc-instructor__content {
  display: flex;
  gap: 60px;
  align-items: flex-start;
  max-width: 860px;
  margin: 0 auto;
}

.gc-instructor__photo {
  flex-shrink: 0;
}

.gc-instructor__photo-img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-primary-light);
  box-shadow: var(--shadow);
}

.gc-instructor__name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--color-primary-dark);
}

.gc-instructor__story {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-text);
  margin-bottom: 16px;
}

.gc-instructor__career {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.gc-instructor__career li {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding-left: 16px;
  position: relative;
}

.gc-instructor__career li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* ============================================
   FAQ
============================================ */
.gc-faq {
  background: var(--color-bg-gray);
}

.gc-faq__list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.gc-faq__item {
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.gc-faq__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  gap: 12px;
  transition: background var(--transition);
}

.gc-faq__question:hover {
  background: var(--color-bg-gray);
}

.gc-faq__question[aria-expanded="true"] {
  color: var(--color-primary);
}

.gc-faq__icon {
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
  line-height: 1;
}

.gc-faq__question[aria-expanded="true"] .gc-faq__icon {
  transform: rotate(45deg);
}

.gc-faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
}

.gc-faq__answer.open {
  max-height: 300px;
  padding: 0 24px 20px;
}

.gc-faq__answer p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.9;
}

/* ============================================
   CTA
============================================ */
.gc-cta {
  position: relative;
  background: linear-gradient(135deg, #0d2b2b 0%, #1a4a4a 100%);
  text-align: center;
  overflow: hidden;
}

.gc-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(66,148,149,0.4) 0%, transparent 70%);
}

.gc-cta__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10,30,30,0.2);
}

.gc-cta__content {
  position: relative;
  z-index: 1;
}

.gc-cta .gc-section__label {
  color: var(--color-primary-light);
}

.gc-cta__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 24px;
}

.gc-cta__text {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  line-height: 2;
  margin-bottom: 40px;
}

.gc-cta__note {
  margin-top: 16px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-sans);
}

/* ============================================
   FOOTER
============================================ */
.gc-footer {
  background: #0a1e1e;
  color: rgba(255,255,255,0.7);
  padding: 60px 0 32px;
}

.gc-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 48px;
  gap: 40px;
  flex-wrap: wrap;
}

.gc-footer__logo {
  font-family: var(--font-sans);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary-light);
  margin-bottom: 8px;
}

.gc-footer__tagline {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.gc-footer__nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--font-sans);
  font-size: 0.875rem;
}

.gc-footer__nav a {
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.gc-footer__nav a:hover {
  color: var(--color-primary-light);
  opacity: 1;
}

.gc-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

/* ============================================
   ANIMATIONS
============================================ */
.fade-in {
  opacity: 0;
  animation: fadeIn 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

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

@media (max-width: 768px) {
  .gc-section {
    padding: 72px 0;
  }

  /* Header */
  .gc-header__nav {
    display: none;
  }

  .gc-header__hamburger {
    display: flex;
  }

  /* Pain grid */
  .gc-pain__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gc-pain__message {
    padding: 28px 24px;
    font-size: 0.95rem;
  }

  /* Reasons */
  .gc-reasons__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Curriculum */
  .gc-curriculum__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Price compare */
  .gc-price__compare-grid {
    flex-direction: column;
  }

  /* Instructor */
  .gc-instructor__content {
    flex-direction: column;
    align-items: center;
    gap: 32px;
    text-align: center;
  }

  .gc-instructor__career li {
    text-align: left;
  }

  /* Flow */
  .gc-flow__step {
    padding: 28px 24px;
  }
}

@media (max-width: 480px) {
  .gc-pain__grid {
    grid-template-columns: 1fr;
  }

  .gc-curriculum__grid {
    grid-template-columns: 1fr;
  }

  .gc-hero__title {
    font-size: 2rem;
  }
}