/* ============================================
   株式会社vehicle - Corporate Website Styles
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Colors */
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-pale: #dbeafe;
  --primary-bg: #eff6ff;
  
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --bg-white: #ffffff;
  --bg-light: #f8fafc;
  --bg-section: #f1f5f9;
  
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  /* Typography */
  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
  --font-display: "Outfit", var(--font-sans);
  
  /* Spacing */
  --section-padding: 100px;
  --container-max: 1200px;
  --header-height: 80px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
  background-color: var(--bg-white);
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

.heading-display {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.heading-section {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: 1rem;
  text-align: center;
}

.heading-section-en {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  text-align: center;
}

.text-lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

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

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

.section {
  padding: var(--section-padding) 0;
}

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

.section--primary {
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--bg-white) 100%);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

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

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

.btn--outline {
  background-color: var(--bg-white);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

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

.btn--ghost {
  color: var(--text-primary);
  padding: 14px 16px;
}

.btn--ghost:hover {
  color: var(--primary);
}

.btn--ghost svg {
  transition: transform var(--transition-fast);
}

.btn--ghost:hover svg {
  transform: translateX(4px);
}

.btn--large {
  padding: 18px 48px;
  font-size: 1rem;
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-left: -8px;
}

.header__logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
}

.header__logo-img {
  height: 56px;
  width: auto;
  object-fit: contain;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header__nav-link {
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.header__nav-link:hover {
  color: var(--primary);
  background-color: var(--primary-bg);
}

.header__nav-link--active {
  color: var(--primary);
}

.header__cta {
  margin-left: 16px;
}

.header__mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

/* Mobile Navigation */
@media (max-width: 968px) {
  .header__nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(100vh - var(--header-height));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 24px;
    background-color: #ffffff;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
  }

  .header__nav.is-open {
    transform: translateX(0);
  }

  .header__nav-link {
    padding: 16px;
    font-size: 1rem;
    border-bottom: 1px solid var(--border-color);
  }

  .header__cta {
    margin: 24px 0 0;
  }

  .header__mobile-toggle {
    display: flex;
  }
}

/* ---------- Footer ---------- */
.footer {
  background-color: var(--text-primary);
  color: var(--bg-white);
  padding: 80px 0 40px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr repeat(2, 1fr);
  gap: 48px;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.footer__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.footer__logo-img {
  height: 56px;
  width: 56px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.footer__address {
  font-size: 0.875rem;
  color: #94a3b8;
  line-height: 1.8;
}

.footer__social {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.footer__social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: #94a3b8;
  transition: all var(--transition-fast);
}

.footer__social-link:hover {
  background-color: var(--primary);
  color: var(--bg-white);
}

.footer__nav-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #94a3b8;
  margin-bottom: 20px;
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__nav-link {
  font-size: 0.9375rem;
  color: #cbd5e1;
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--bg-white);
}

.footer__bottom {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: #64748b;
}

.footer__bottom-links {
  display: flex;
  gap: 24px;
}

.footer__bottom-link:hover {
  color: #cbd5e1;
}

@media (max-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

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

/* ---------- Cards ---------- */
.card {
  background-color: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.card__image {
  aspect-ratio: 16 / 10;
  background-color: var(--bg-section);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.card__body {
  padding: 24px;
}

.card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card__text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* ---------- Utility Classes ---------- */
.text-center {
  text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.mb-16 { margin-bottom: 4rem; }
.mt-16 { margin-top: 4rem; }

.mt-auto { margin-top: auto; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

/* ---------- Page Offset for Fixed Header ---------- */
main {
  padding-top: var(--header-height);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }