/* ===================================
   自由不動産 - Modern Stylesheet
   =================================== */

/* CSS Variables */
:root {
  /* Colors */
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --accent: #c9a227;
  --accent-light: #d4af37;
  --accent-dark: #b8960f;
  --white: #ffffff;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;

  /* Typography */
  --font-primary: 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif;
  --font-english: 'Montserrat', sans-serif;

  /* Spacing */
  --section-padding: 120px;
  --container-width: 1200px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s ease;
  --transition-slow: 0.6s ease;
}

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

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

body {
  font-family: var(--font-primary);
  color: var(--gray-800);
  background-color: var(--white);
  line-height: 1.8;
  overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-logo-img {
  width: 100px;
  height: 100px;
  border-radius: 20px;
  background: transparent;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.4;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 1rem;
  position: relative;
}

.section-title-en {
  font-family: var(--font-english);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 600px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 0;
  transition: all var(--transition-medium);
  background: linear-gradient(180deg, rgba(10, 10, 20, 0.85) 0%, rgba(10, 10, 20, 0.6) 60%, rgba(10, 10, 20, 0) 100%);
}

.header.scrolled {
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--white);
  background: transparent;
}

.logo-img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
  background: transparent;
}

.logo-text {
  font-family: var(--font-english);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.3;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6), 0 1px 3px rgba(0, 0, 0, 0.4);
}

.logo-text-jp {
  font-family: var(--font-primary);
  font-size: 0.75rem;
  font-weight: 500;
  display: block;
  letter-spacing: 0.15em;
  opacity: 0.95;
  margin-top: 2px;
  color: var(--accent);
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  color: var(--white);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-medium);
}

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

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: 0.25rem;
  background: rgba(255, 255, 255, 0.15);
  padding: 0.25rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.lang-btn {
  padding: 0.5rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.lang-btn.active,
.lang-btn:hover {
  background: var(--accent);
  color: var(--primary);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-slideshow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transform: scale(1.05);
  transition: opacity 1.5s ease-in-out, transform 6s ease-out;
  will-change: opacity, transform;
}

.hero-slide.active {
  opacity: 1;
  transform: scale(1);
}

.hero-slide.prev {
  opacity: 0;
  transform: scale(1);
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(26, 26, 46, 0.4) 0%, rgba(22, 33, 62, 0.35) 100%);
}

.hero-bg-pattern {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 50%, var(--accent) 1px, transparent 1px),
    radial-gradient(circle at 80% 50%, var(--accent) 1px, transparent 1px);
  background-size: 100px 100px;
  animation: float 20s ease-in-out infinite;
  opacity: 0.3;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(1deg); }
}

.hero-content {
  text-align: center;
  color: var(--white);
  z-index: 1;
  padding: 2rem;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-title-accent {
  color: var(--accent);
  display: block;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 50px;
  transition: all var(--transition-medium);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(201, 162, 39, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--white);
  opacity: 0.6;
  animation: bounce 2s infinite;
}

.scroll-indicator span {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-indicator-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--white);
  border-bottom: 2px solid var(--white);
  transform: rotate(45deg);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* Sections */
section {
  padding: var(--section-padding) 0;
}

/* About Section */
.about {
  background: var(--gray-100);
}

.about-header {
  text-align: center;
  max-width: 900px;
  margin: 0 auto 4rem;
}

.about-catchphrase {
  font-size: 1.25rem;
  color: var(--gray-700);
  line-height: 1.9;
  margin-top: 1.5rem;
}

.promises-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.promise-card {
  background: var(--white);
  border-radius: 20px;
  padding: 2.5rem;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
  transition: all var(--transition-medium);
  border: 1px solid transparent;
}

.promise-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
  border-color: var(--accent);
}

.promise-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--accent);
}

.promise-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
}

.promise-desc {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.8;
}

.about-cta {
  text-align: center;
  margin-top: 2rem;
}

.btn-secondary {
  background: var(--primary);
  color: var(--white);
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-medium);
}

.btn-secondary:hover {
  background: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(26, 26, 46, 0.3);
}

.about-features {
  display: grid;
  gap: 1.5rem;
}

.about-feature {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.about-feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.about-feature-content h4 {
  font-size: 1.0625rem;
  margin-bottom: 0.25rem;
}

.about-feature-content p {
  font-size: 0.9375rem;
  color: var(--gray-600);
}

/* Services Section */
.services {
  background: var(--white);
}

.services-header {
  text-align: center;
  margin-bottom: 4rem;
}

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

.service-card {
  background: var(--white);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  transition: all var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-medium);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
}

.service-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.service-description {
  color: var(--gray-600);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ===================================
   Total Support Section
   =================================== */
.total-support {
  background: var(--gray-100);
}

.total-support-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem;
}

.total-support-header .section-subtitle {
  margin-top: 1.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.support-card {
  background: var(--white);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: all var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.support-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition-medium);
}

.support-card:hover::before {
  transform: scaleY(1);
}

.support-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.support-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.support-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.support-desc {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.7;
}

.support-notice {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.support-cta {
  text-align: center;
  margin-top: 2rem;
}

/* Company Section */
.company {
  background: var(--primary);
  color: var(--white);
}

.company .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.company-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 4rem;
}

.company-info {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(10px);
}

.company-info-item {
  display: flex;
  padding: 1.25rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.company-info-item:last-child {
  border-bottom: none;
}

.company-info-label {
  width: 120px;
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
  font-size: 0.875rem;
}

.company-info-value {
  color: var(--white);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
}

.company-name-main {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--white);
  display: block;
  margin-bottom: 0.25rem;
}

.company-name-sub {
  font-size: 0.875rem;
  color: var(--accent);
  display: block;
}

.company-map {
  border-radius: 20px;
  overflow: hidden;
  height: 100%;
  min-height: 400px;
}

.company-map iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Contact Section */
.contact {
  background: var(--gray-100);
}

.contact-header {
  text-align: center;
  margin-bottom: 4rem;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info {
  padding: 2rem 0;
}

.contact-info-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.contact-info-icon {
  width: 56px;
  height: 56px;
  background: var(--accent);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-info-content h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.contact-info-content p {
  color: var(--gray-600);
}

.contact-info-content a {
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 600;
}

.contact-social {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.social-btn {
  width: 48px;
  height: 48px;
  background: var(--white);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  text-decoration: none;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.social-btn:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-3px);
}

/* Contact Form */
.contact-form {
  background: var(--white);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

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

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.form-label .required {
  color: #e53e3e;
  margin-left: 0.25rem;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 1rem 1.25rem;
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

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

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

.form-submit {
  width: 100%;
  padding: 1.125rem;
  background: var(--accent);
  color: var(--primary);
  border: none;
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-medium);
}

.form-submit:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(201, 162, 39, 0.3);
}

/* Footer */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  background: transparent;
}

.footer-logo-img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
  background: transparent;
}

.footer-logo-text {
  font-family: var(--font-english);
  font-size: 1.25rem;
  font-weight: 700;
}

.footer-description {
  color: var(--gray-500);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.footer-title {
  font-size: 1rem;
  margin-bottom: 1.5rem;
  color: var(--white);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
  color: var(--gray-500);
  font-size: 0.9375rem;
}

.footer-links a {
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

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

.footer-license {
  text-align: center;
  padding: 1.5rem 0;
  margin-bottom: 1rem;
  border-top: 1px solid var(--gray-800);
  border-bottom: 1px solid var(--gray-800);
}

.footer-license p {
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.footer-bottom {
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  color: var(--gray-500);
  font-size: 0.875rem;
}

.footer-legal {
  display: flex;
  gap: 2rem;
}

.footer-legal a {
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

/* Animations */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

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

.fade-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.8s ease;
}

.fade-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.8s ease;
}

.fade-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .promises-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .promise-card {
    padding: 2rem;
  }

  .about-grid,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

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

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

  .company-content {
    grid-template-columns: 1fr;
  }

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

/* ===================================
   Mobile Navigation - Drawer Style
   =================================== */

/* Mobile Navigation (base hidden) */
.nav-mobile {
  display: none;
}

/* Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1100;
  position: relative;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all var(--transition-fast);
  display: block;
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
  }

  /* デスクトップ側だけ消す（巻き添え防止） */
  .nav .nav-list { display: none; }
  .nav .lang-switcher { display: none; }

  .menu-toggle { display: flex; }

  /* Drawer overlay container */
  .nav-mobile {
    display: block;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
  }

  .nav-mobile.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  /* Backdrop */
  .nav-backdrop {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0);
    transition: background var(--transition-medium);
  }
  .nav-mobile.active .nav-backdrop {
    background: rgba(0, 0, 0, 0.55);
  }

  /* Drawer panel (right slide) */
  .nav-drawer {
    position: absolute;
    top: 96px; right: 0;
    width: min(85vw, 360px);
    height: calc(100% - 96px);
    background: var(--primary);
    transform: translateX(100%);
    transition: transform var(--transition-medium);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.5rem 2rem 2rem;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav-mobile.active .nav-drawer {
    transform: translateX(0);
  }

  .nav-drawer .nav-list {
    display: flex;
    flex-direction: column;
    text-align: left;
    gap: 1.5rem;
  }

  .nav-drawer .nav-link {
    font-size: 1.125rem;
  }

  .nav-drawer .lang-switcher {
    justify-content: flex-start;
  }

  body.menu-open {
    overflow: hidden;
    touch-action: none;
  }

  /* menu toggle always tappable */
  .menu-toggle {
    position: relative;
    z-index: 1100;
  }

  /* Hamburger -> X */
  .menu-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); width: 28px; }
  .menu-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
  .menu-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); width: 28px; }

  /* 既存の他の768px以下レイアウト */
  .services-grid {
    grid-template-columns: 1fr;
  }

  .support-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .support-card {
    padding: 1.5rem;
  }

  .support-notice {
    font-size: 0.75rem;
    padding: 0 1rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .hero-title {
    font-size: clamp(2rem, 6vw, 3rem);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .lang-switcher {
    gap: 0.125rem;
  }

  .lang-btn {
    padding: 0.375rem 0.5rem;
    font-size: 0.625rem;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ===== Mobile Drawer Fix: layering + layout ===== */

/* Keep header + hamburger above the mobile overlay so it never disappears */
.header { z-index: 1200 !important; }
.menu-toggle { z-index: 1300 !important; position: relative; background: transparent !important; }

@media (max-width: 768px) {
  .nav-mobile { z-index: 1100 !important; }

  /* Drawer panel: reduce wasted space and left-align content */
  .nav-drawer {
    top: 90px !important;
    height: calc(100% - 90px) !important;
    width: min(55vw, 220px) !important;
    max-width: 220px !important;

    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;

    /* Drawer starts below header now, reduce top padding */
    padding: 1.5rem 1.25rem 2rem !important;
    gap: 1.25rem;
    overflow-y: auto;
  }

  /* Make links full-width for better tap targets */
  .nav-drawer .nav-list { width: 100%; }
  .nav-drawer .nav-list li { width: 100%; }
  .nav-drawer .nav-link {
    display: block;
    width: 100%;
    text-align: left;
  }

  /* Language switcher: hide in drawer (use header mini switcher instead) */
  .nav-drawer .lang-switcher {
    display: none;
  }
}

/* ===== Mobile-only mini language switch ===== */
.lang-mini { display: none; position: relative; }

/* ===== Scroll to Top Button (Mobile Only) ===== */
.scroll-top-btn {
  display: none;
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary);
  border: none;
  cursor: pointer;
  z-index: 900;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background 0.2s ease;
  align-items: center;
  justify-content: center;
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background: var(--accent-light);
}

.scroll-top-btn:active {
  transform: scale(0.95);
}

.scroll-top-btn svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  .scroll-top-btn {
    display: flex;
  }
}

@media (max-width: 768px) {
  .lang-mini { display: inline-block; }
  .lang-mini-btn {
    height: 40px;
    padding: 0 10px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.25);
    background: rgba(0,0,0,0.25);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    cursor: pointer;
  }
  .lang-mini-pop {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 110px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.18);
    background: rgba(8, 14, 28, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 6px;
    display: none;
    z-index: 9999;
  }
  .lang-mini-pop.open { display: block; }
  .lang-mini-item {
    width: 100%;
    text-align: left;
    padding: 10px 10px;
    border: 0;
    background: transparent;
    color: #fff;
    border-radius: 10px;
    font-size: 13px;
    cursor: pointer;
  }
  .lang-mini-item:hover { background: rgba(255,255,255,0.08); }
}