/* ============================================
   Common Styles - Navigation, Footer, Shared
   kichi - ワクワクをつくる基地
   ============================================ */

/* ── Base ── */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-white);
  overflow-x: hidden;
}

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

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

/* ── Section ── */
.section {
  padding: var(--space-20) 0;
  position: relative;
}

.section--lg {
  padding: var(--space-32) 0;
}

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

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

.section--kraft {
  background-color: var(--color-kraft-light);
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 30px,
      rgba(139, 115, 85, 0.05) 30px,
      rgba(139, 115, 85, 0.05) 31px
    );
}

/* ── Section Label (English sub-label) ── */
.section-label {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.section-label--light {
  color: rgba(255, 255, 255, 0.6);
}

/* ── Section Title ── */
.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: 1.3;
  margin-bottom: var(--space-6);
}

.section-title--center {
  text-align: center;
}

/* ── Section Subtitle ── */
.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-light);
  line-height: 2;
  max-width: 640px;
}

.section-subtitle--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-4) 0;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}

.nav.is-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  padding: var(--space-3) 0;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav__logo {
  height: 48px;
  width: auto;
  flex-shrink: 0;
}

.nav__logo img {
  height: 100%;
  width: auto;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav__link-en {
  display: block;
  font-size: var(--text-sm);
}

.nav__link-jp {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-magenta);
  transition: width 0.3s ease;
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-6);
  background-color: var(--color-dark);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  border-radius: var(--radius-full);
  transition: transform var(--transition-spring), background-color var(--transition-fast);
}

.nav__cta:hover {
  transform: scale(1.05);
  background-color: #333;
}

/* ── Mobile Menu Toggle ── */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: var(--z-mobile-menu);
}

.nav__toggle span {
  display: block;
  height: 2px;
  background-color: var(--color-dark);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav__toggle.is-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.is-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

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

  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    height: 100dvh;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px var(--space-8) var(--space-8);
    gap: var(--space-6);
    box-shadow: var(--shadow-xl);
    transition: right 0.4s var(--ease-out-expo);
    z-index: var(--z-mobile-menu);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav__menu.is-open {
    right: 0;
  }

  .nav__overlay {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: calc(var(--z-mobile-menu) - 1);
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  .nav__overlay.is-open {
    opacity: 1;
    pointer-events: auto;
  }
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-light-gray);
  padding: var(--space-12) 0 var(--space-6);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  height: 36px;
  margin-bottom: var(--space-4);
}

.footer__logo img {
  height: 100%;
  width: auto;
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
}

.footer__nav {
  display: flex;
  gap: var(--space-12);
}

.footer__nav-title {
  font-family: var(--font-heading);
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer__stats {
  display: flex;
  gap: var(--space-8);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-light-gray);
  border-bottom: 1px solid var(--color-light-gray);
  margin-bottom: var(--space-6);
}

.footer__stat {
  text-align: center;
}

.footer__stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--font-black);
  color: var(--color-text);
  line-height: 1.2;
}

.footer__stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .footer__inner {
    flex-direction: column;
  }

  .footer__nav {
    flex-direction: column;
    gap: var(--space-6);
  }

  .footer__stats {
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
  }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-spring), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn:active {
  animation: buttonPress 0.2s ease;
}

/* Primary - Colored with pattern */
.btn--primary {
  background-color: var(--color-magenta);
  color: var(--color-white);
  box-shadow: 0 4px 0 #B50063, var(--shadow-md);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #B50063, var(--shadow-lg);
}

.btn--primary:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #B50063, var(--shadow-sm);
}

/* Secondary */
.btn--secondary {
  background-color: var(--color-white);
  color: var(--color-text);
  border: 2px solid var(--color-text);
  box-shadow: 0 4px 0 var(--color-text), var(--shadow-sm);
}

.btn--secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--color-text), var(--shadow-md);
}

.btn--secondary:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 var(--color-text);
}

/* CTA - Large */
.btn--cta {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
}

/* Dark */
.btn--dark {
  background-color: var(--color-dark);
  color: var(--color-white);
  box-shadow: 0 4px 0 #000, var(--shadow-md);
}

.btn--dark:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #000, var(--shadow-lg);
}

/* Sky Blue */
.btn--blue {
  background-color: var(--color-sky-blue);
  color: var(--color-white);
  box-shadow: 0 4px 0 #0078B0, var(--shadow-md);
}

.btn--blue:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #0078B0, var(--shadow-lg);
}

/* ============================================
   Decorative Elements
   ============================================ */

/* ── Masking Tape ── */
.tape {
  position: absolute;
  width: 80px;
  height: 24px;
  opacity: 0.8;
  z-index: var(--z-tape);
  pointer-events: none;
}

.tape--blue {
  background: repeating-linear-gradient(
    45deg,
    var(--tape-blue),
    var(--tape-blue) 3px,
    rgba(255, 255, 255, 0.4) 3px,
    rgba(255, 255, 255, 0.4) 6px
  );
}

.tape--pink {
  background: repeating-linear-gradient(
    -45deg,
    var(--tape-pink),
    var(--tape-pink) 3px,
    rgba(255, 255, 255, 0.4) 3px,
    rgba(255, 255, 255, 0.4) 6px
  );
}

.tape--yellow {
  background: repeating-linear-gradient(
    0deg,
    var(--tape-yellow),
    var(--tape-yellow) 3px,
    rgba(255, 255, 255, 0.4) 3px,
    rgba(255, 255, 255, 0.4) 6px
  );
}

.tape--green {
  background: repeating-linear-gradient(
    45deg,
    var(--tape-green),
    var(--tape-green) 3px,
    rgba(255, 255, 255, 0.4) 3px,
    rgba(255, 255, 255, 0.4) 6px
  );
}

/* ── Speech Bubble ── */
.bubble {
  position: relative;
  background: var(--color-white);
  border: 2px solid var(--color-text);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-handwrite);
  font-size: var(--text-sm);
  display: inline-block;
}

.bubble::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 20px;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 10px solid var(--color-text);
}

.bubble::before {
  content: '';
  position: absolute;
  bottom: -7px;
  left: 21px;
  width: 0;
  height: 0;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-top: 9px solid var(--color-white);
  z-index: 1;
}

/* ── Polaroid Photo Frame ── */
.polaroid {
  background: var(--color-white);
  padding: 10px 10px 40px;
  box-shadow: var(--shadow-polaroid);
  position: relative;
  transition: transform var(--transition-spring), box-shadow var(--transition-base);
}

.polaroid:hover {
  transform: translateY(-8px) rotate(0deg) !important;
  box-shadow: var(--shadow-polaroid-hover);
  z-index: var(--z-card-hover);
}

.polaroid__image {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.polaroid__caption {
  position: absolute;
  bottom: 8px;
  left: 12px;
  right: 12px;
  font-family: var(--font-handwrite);
  font-size: var(--text-sm);
  color: var(--color-text-light);
  text-align: center;
}

/* ── Handwritten Arrow ── */
.arrow-hand {
  font-family: var(--font-handwrite);
  font-size: var(--text-xl);
  color: var(--color-magenta);
  display: inline-block;
  transform: rotate(-5deg);
}

/* ── Category Label (tape style) ── */
.category-label {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-handwrite);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--color-white);
  transform: rotate(-2deg);
}

.category-label--puzzle {
  background-color: var(--color-sky-blue);
}

.category-label--event {
  background-color: var(--color-green);
}

/* ── Scattered Background Shapes ── */
.bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: var(--z-bg-shapes);
}

.bg-shape {
  position: absolute;
  opacity: 0.15;
  pointer-events: none;
}

.bg-shape--circle {
  border-radius: 50%;
}

.bg-shape--triangle {
  width: 0;
  height: 0;
  background: transparent !important;
}

.bg-shape--ring {
  border-radius: 50%;
  background: transparent !important;
  border: 4px solid currentColor;
}

/* ── White Card (readability backdrop) ── */
.white-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-card);
  position: relative;
}

/* ── Memo Paper ── */
.memo-paper {
  background: var(--color-white);
  box-shadow: var(--shadow-lg);
  padding: var(--space-8) var(--space-10);
  position: relative;
  max-width: 600px;
}

.memo-paper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 30px;
  right: 30px;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-sky-blue) 0,
    var(--color-sky-blue) 8px,
    transparent 8px,
    transparent 16px,
    var(--color-magenta) 16px,
    var(--color-magenta) 24px,
    transparent 24px,
    transparent 32px
  );
}

/* ── Contact Banner ── */
.contact-banner {
  background: var(--color-sky-blue);
  color: var(--color-white);
  padding: var(--space-16) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.contact-banner__title {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
  line-height: 1.4;
}

.contact-banner__text {
  font-size: var(--text-base);
  margin-bottom: var(--space-8);
  opacity: 0.9;
}

.contact-banner__buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Hero (Dark) ── */
.hero-dark {
  background-color: var(--color-dark-section);
  color: var(--color-white);
  padding: var(--space-32) 0 var(--space-20);
  position: relative;
  overflow: hidden;
}

.hero-dark__label {
  font-size: var(--text-sm);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.6;
  margin-bottom: var(--space-2);
}

.hero-dark__sublabel {
  font-size: var(--text-sm);
  opacity: 0.6;
  margin-bottom: var(--space-4);
}

.hero-dark__title {
  font-family: var(--font-heading);
  font-size: var(--text-6xl);
  font-weight: var(--font-black);
  line-height: 1.2;
  margin-bottom: var(--space-6);
}

.hero-dark__text {
  font-size: var(--text-lg);
  line-height: 2;
  opacity: 0.85;
  max-width: 600px;
}

/* ── Decorative circles for dark sections ── */
.deco-circle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.deco-circle--cyan {
  background: var(--color-sky-blue);
  opacity: 0.6;
}

.deco-circle--magenta {
  background: var(--color-magenta);
  opacity: 0.4;
}

.deco-circle--yellow {
  background: var(--color-yellow);
  opacity: 0.3;
}

/* ── Breadcrumb ── */
.breadcrumb {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

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

.breadcrumb__separator {
  margin: 0 var(--space-2);
}

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

.font-heading { font-family: var(--font-heading); }
.font-body { font-family: var(--font-body); }
.font-handwrite { font-family: var(--font-handwrite); }

.color-blue { color: var(--color-sky-blue); }
.color-magenta { color: var(--color-magenta); }
.color-yellow { color: var(--color-yellow); }
.color-green { color: var(--color-green); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  padding: var(--space-4);
  background: var(--color-dark);
  color: var(--color-white);
  z-index: 999;
}

.skip-link:focus {
  top: 0;
}