/* =========================================
   Variables & Reset
   ========================================= */
:root {
  --color-navy: #3d52a0;
  --color-navy-light: #4a62b5;
  --color-gold: #38b2ac;
  --color-gold-light: #4ecdc4;
  --color-bg: #f4f7fc;
  --color-bg-alt: #e8f0fb;
  --color-text: #2d2d2d;
  --color-text-muted: #666;
  --color-white: #ffffff;
  --font-serif: 'M PLUS Rounded 1c', sans-serif;
  --font-sans: 'Noto Sans JP', sans-serif;
  --max-width: 1100px;
  --section-padding: 80px 24px;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --transition: 0.3s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  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: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* =========================================
   Section Titles
   ========================================= */
.section-label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 10px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  border-radius: 2px;
  margin-right: 8px;
  vertical-align: middle;
  transform: rotate(45deg);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.4;
  margin-bottom: 16px;
}

.section-lead {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 600px;
}

.section-header {
  margin-bottom: 56px;
}

/* =========================================
   Header
   ========================================= */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

#site-header.scrolled {
  background: var(--color-navy);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
  padding: 14px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.site-logo {
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 0.875rem;
  line-height: 1.5;
  font-weight: 600;
}

.site-logo span {
  display: block;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
}

.global-nav ul {
  display: flex;
  gap: 36px;
}

.global-nav a {
  color: var(--color-white);
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition);
}

.global-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width var(--transition);
}

.global-nav a:hover::after {
  width: 100%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-white);
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-navy);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 1.4rem;
  letter-spacing: 0.1em;
}

.mobile-nav-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
}

/* =========================================
   Hero
   ========================================= */
#hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: url('../images/hero.webp') center center / cover no-repeat;
  color: var(--color-white);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(45, 58, 120, 0.75) 0%, rgba(45, 58, 120, 0.50) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero-label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--color-gold);
  margin-bottom: 20px;
  font-family: var(--font-serif);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4.5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.hero-sub {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  opacity: 0.9;
  letter-spacing: 0.1em;
  margin-bottom: 44px;
}

.btn-primary {
  display: inline-block;
  padding: 16px 40px;
  background: var(--color-gold);
  color: var(--color-white);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  border-radius: 50px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(56, 178, 172, 0.35);
}

.btn-primary:hover {
  background: var(--color-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(56, 178, 172, 0.45);
}

/* =========================================
   Profile
   ========================================= */
#profile {
  padding: var(--section-padding);
  background: var(--color-white);
}

.profile-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 64px;
  align-items: center;
}

.profile-image-wrap {
  position: relative;
}

.profile-image-wrap img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  aspect-ratio: 4/5;
  object-fit: cover;
  object-position: top center;
}

/* Placeholder styles */
.img-placeholder {
  width: 100%;
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, #e8e4de 0%, #d4cfc7 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 0.85rem;
  text-align: center;
  border: 2px dashed #c4bdb5;
  letter-spacing: 0.05em;
}

.profile-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--color-navy);
  margin-bottom: 6px;
}

.profile-name strong {
  font-size: 1.5rem;
  display: block;
}

.profile-divider {
  width: 40px;
  height: 2px;
  background: var(--color-gold);
  margin: 20px 0;
}

.profile-text {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-text);
}

/* =========================================
   Services
   ========================================= */
#service {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

.service-card-video {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}

.service-card-body {
  padding: 32px;
}

.service-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-navy), var(--color-gold));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(56, 178, 172, 0.3);
}

.service-icon svg {
  width: 22px;
  height: 22px;
  fill: var(--color-white);
}

.service-card-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 16px;
}

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

/* =========================================
   Why Us
   ========================================= */
#why {
  padding: var(--section-padding);
  background: var(--color-navy);
  color: var(--color-white);
}

#why .section-title {
  color: var(--color-white);
}

#why .section-lead {
  color: rgba(255, 255, 255, 0.7);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.why-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(56, 178, 172, 0.35);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: background var(--transition), border-color var(--transition);
}

.why-card:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(56, 178, 172, 0.6);
}

.why-number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gold);
  opacity: 0.5;
  line-height: 1;
  margin-bottom: 16px;
}

.why-card-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-white);
}

.why-card-text {
  font-size: 0.9rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.75);
}

/* =========================================
   Flow
   ========================================= */
#flow {
  padding: var(--section-padding);
  background: var(--color-bg-alt);
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.flow-steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: calc(12.5%);
  width: 75%;
  height: 2px;
  background: var(--color-gold);
  opacity: 0.4;
  z-index: 0;
}

.flow-step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 16px;
}

.flow-step-number {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-navy), var(--color-gold));
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 4px 16px rgba(56, 178, 172, 0.4);
}

.flow-step-number .step-label {
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1;
}

.flow-step-number .step-num {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.2;
}

.flow-step-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 12px;
  line-height: 1.4;
}

.flow-step-text {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* =========================================
   Contact
   ========================================= */
#contact {
  padding: var(--section-padding);
  background: var(--color-white);
}

.contact-inner {
  max-width: 680px;
  margin: 0 auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.03em;
}

.form-label .required {
  display: inline-block;
  margin-left: 6px;
  font-size: 0.68rem;
  background: var(--color-gold);
  color: var(--color-white);
  padding: 2px 7px;
  border-radius: 50px;
  vertical-align: middle;
  font-weight: 600;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid #d8d3cc;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(56, 178, 172, 0.15);
}

.form-textarea {
  resize: vertical;
  min-height: 160px;
}

.form-error {
  font-size: 0.8rem;
  color: #d64a4a;
  display: none;
}

.form-error.visible {
  display: block;
}

.form-submit {
  text-align: center;
}

.btn-submit {
  display: inline-block;
  padding: 18px 64px;
  background: var(--color-navy);
  color: var(--color-white);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.08em;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(61, 82, 160, 0.3);
}

.btn-submit:hover {
  background: var(--color-navy-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(61, 82, 160, 0.4);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.form-message {
  display: none;
  text-align: center;
  padding: 20px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
}

.form-message.success {
  display: block;
  background: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #a5d6a7;
}

.form-message.error {
  display: block;
  background: #ffebee;
  color: #c62828;
  border: 1px solid #ef9a9a;
}

/* =========================================
   Footer
   ========================================= */
#site-footer {
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  padding: 36px 24px;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 900px) {
  .profile-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .profile-image-wrap {
    max-width: 320px;
    margin: 0 auto;
  }

  .profile-image-wrap img,
  .profile-image-wrap .img-placeholder {
    aspect-ratio: 1/1;
  }

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

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

  .flow-steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .flow-steps::before {
    display: none;
  }

  .flow-step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    text-align: left;
  }

  .flow-step-number {
    flex-shrink: 0;
    margin: 0;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 20px;
  }

  .global-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero-title {
    font-size: clamp(1.6rem, 6vw, 2.4rem);
  }
}