/* ==========================================================================
   熊ラボ KUMALABO - style.css
   グローバル + ヘッダー + フッター
   個別ページのスタイルは別ファイル (home.css 等) に分離する方針
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Brand colors */
  --kl-primary: #3F5A4A;        /* ダークセージグリーン (ロゴ色) */
  --kl-primary-dark: #2D4235;   /* hover / 濃いめ */
  --kl-primary-light: #6B8478;  /* 薄いアクセント */
  --kl-accent: #E85D2C;         /* オレンジ (CTA・購入ボタン) */
  --kl-accent-dark: #C84A1F;    /* hover */
  --kl-warn: #F5C518;           /* 警告イエロー (黒黄ストライプ用) */
  --kl-warn-dark: #1A1A1A;      /* 警告イエローと組む黒 */

  /* Surface */
  --kl-bg: #FAF7F2;             /* クリーム背景 */
  --kl-bg-white: #FFFFFF;       /* 純白 */
  --kl-bg-soft: #F1ECE3;        /* セクション仕切り用の薄色 */

  /* Text */
  --kl-text: #1A1A1A;           /* 本文 */
  --kl-text-mute: #666666;      /* 補足テキスト */
  --kl-text-on-dark: #FFFFFF;   /* 暗背景上 */
  --kl-text-on-dark-mute: rgba(255,255,255,0.75);

  /* Border / divider */
  --kl-border: #E5E0D8;
  --kl-border-dark: rgba(255,255,255,0.15);

  /* Typography */
  --kl-font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --kl-font-handwritten: 'Klee One', 'Noto Sans JP', sans-serif;

  /* Layout */
  --kl-max-width: 1160px;
  --kl-header-height: 72px;

  /* Effects */
  --kl-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --kl-shadow-md: 0 4px 16px rgba(0,0,0,0.10);
  --kl-shadow-lg: 0 8px 32px rgba(0,0,0,0.14);
  --kl-radius-sm: 4px;
  --kl-radius-md: 8px;
  --kl-radius-lg: 16px;
  --kl-radius-full: 9999px;

  /* Transition */
  --kl-transition: 0.2s ease;
}

/* --------------------------------------------------------------------------
   Reset / Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--kl-header-height);
}

body {
  margin: 0;
  font-family: var(--kl-font-sans);
  font-weight: 400;
  color: var(--kl-text);
  background-color: var(--kl-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* ヘッダー固定分のpadding-topは不要 (sticky方式のため) */
}

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

a {
  color: var(--kl-primary);
  text-decoration: none;
  transition: color var(--kl-transition);
}

a:hover {
  color: var(--kl-accent);
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.4;
  margin: 0;
}

p {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   Header (sticky)
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--kl-primary);
  box-shadow: var(--kl-shadow-sm);
  height: var(--kl-header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  max-width: var(--kl-max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.header-logo img {
  height: 44px;
  width: auto;
}

#globalNav {
  display: flex;
  align-items: center;
  gap: 24px;
}

#globalNav a {
  color: var(--kl-text-on-dark);
  font-weight: 500;
  font-size: 0.95rem;
  white-space: nowrap;
  padding: 6px 0;
  transition: color var(--kl-transition);
}

#globalNav a:hover {
  color: var(--kl-warn);
}

#globalNav .nav-cta {
  background-color: var(--kl-accent);
  color: var(--kl-text-on-dark);
  padding: 10px 20px;
  border-radius: var(--kl-radius-full);
  font-weight: 700;
  transition: background-color var(--kl-transition), transform var(--kl-transition);
}

#globalNav .nav-cta:hover {
  background-color: var(--kl-accent-dark);
  color: var(--kl-text-on-dark);
  transform: translateY(-1px);
}

/* Mobile nav toggle (hamburger) */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  padding: 0;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--kl-text-on-dark);
  transition: transform var(--kl-transition), opacity var(--kl-transition);
}

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

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

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

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--kl-primary-dark);
  color: var(--kl-text-on-dark);
  padding: 56px 24px 0;
  margin-top: 80px;
}

.footer-inner {
  max-width: var(--kl-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-logo-img {
  height: 44px;
  width: auto;
  margin-bottom: 16px;
}

.footer-company {
  font-size: 0.9rem;
  color: var(--kl-text-on-dark);
  margin-bottom: 16px;
  line-height: 1.8;
}

.footer-caution {
  font-size: 0.8rem;
  color: var(--kl-text-on-dark-mute);
  line-height: 1.7;
}

.footer-heading {
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  color: var(--kl-warn);
}

.footer-inner > div > a {
  display: block;
  color: var(--kl-text-on-dark-mute);
  font-size: 0.9rem;
  padding: 6px 0;
}

.footer-inner > div > a:hover {
  color: var(--kl-text-on-dark);
}

.footer-bottom {
  max-width: var(--kl-max-width);
  margin: 0 auto;
  padding: 20px 0;
  border-top: 1px solid var(--kl-border-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--kl-text-on-dark-mute);
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Scroll fade-in animation (used by base.html IntersectionObserver)
   -------------------------------------------------------------------------- */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* --------------------------------------------------------------------------
   Responsive: Tablet (~960px)
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .header-inner {
    padding: 0 16px;
  }

  #globalNav {
    gap: 16px;
  }

  #globalNav a {
    font-size: 0.9rem;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-inner > div:first-child {
    grid-column: 1 / -1;
  }
}

/* --------------------------------------------------------------------------
   Responsive: Mobile (~720px)
   -------------------------------------------------------------------------- */
@media (max-width: 720px) {
  :root {
    --kl-header-height: 64px;
  }

  .header-logo img {
    height: 36px;
  }

  .nav-toggle {
    display: flex;
  }

  #globalNav {
    position: fixed;
    top: var(--kl-header-height);
    left: 0;
    right: 0;
    background-color: var(--kl-primary);
    flex-direction: column;
    gap: 0;
    padding: 16px 0;
    box-shadow: var(--kl-shadow-md);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    max-height: calc(100vh - var(--kl-header-height));
    overflow-y: auto;
  }

  #globalNav.open {
    transform: translateY(0);
  }

  #globalNav a {
    padding: 14px 24px;
    border-bottom: 1px solid var(--kl-border-dark);
    width: 100%;
    font-size: 1rem;
  }

  #globalNav .nav-cta {
    margin: 12px 24px 0;
    text-align: center;
    border-bottom: none;
    width: auto;
  }

  .footer {
    padding: 40px 16px 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}