/* =========================================
   Variables & Theme
   ========================================= */
:root {
  /* Colors - BBQ Theme */
  --color-bg: #fffcf4;
  --color-surface: #54a2c9;
  --color-surface-hover: #458ab0;
  --color-text-main: #333333;
  --color-text-muted: #666666;
  --color-accent: #e65100;
  --color-accent-hover: #ff6d00;
  --color-border: #e0ded6;

  /* Typography */
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Serif JP', serif;

  /* Layout */
  --container-width: 1200px;
  --header-height: 80px;

  /* Animation */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================
   Reset & Base
   ========================================= */
*,
*::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-main);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

ul,
ol {
  list-style: none;
}

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

/* =========================================
   Typography & Utilities
   ========================================= */

.section {
  padding: 100px 0;

  .container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 5%;

    > .header {
      text-align: center;
      margin-bottom: 60px;
    }

    .subtitle {
      display: block;
      color: var(--color-accent);
      font-size: 1rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .title {
      font-family: var(--font-serif);
      font-size: 2.5rem;
      font-weight: 600;
      color: var(--color-text-main);
      letter-spacing: 0.05em;
      margin-bottom: 24px;
    }

    .lead {
      color: var(--color-text-muted);
      font-size: 1.1rem;
    }

    .action {
      text-align: center;
      margin-top: 50px;
    }
  }


  @media (max-width: 960px) {
    .container {
      .title {
        font-size: 1.8rem;
      }
    }
  }
}


/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #fff;
  border: 2px solid var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(230, 81, 0, 0.3);
}

.btn--large {
  padding: 18px 40px;
  font-size: 1.1rem;
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text-main);
  border: 1px solid var(--color-text-muted);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn--full {
  width: 100%;
  background-color: var(--color-surface-hover);
  color: #fff;
}

.btn--full:hover {
  background-color: var(--color-accent);

}

.btn--text {
  padding: 0;
  color: var(--color-accent);
  position: relative;
  border-bottom: 1px solid transparent;
  border-radius: 0;
}

.btn--text:hover {
  border-bottom: 1px solid var(--color-accent);
}

.btn--white {
  padding: 0;
  color: #fff;
  position: relative;
  border-bottom: 1px solid transparent;
  border-radius: 0;
}

.btn--white:hover {
  border-bottom: 1px solid #fff;
}

.sp-only {
  display: none;
}

@media (max-width: 768px) {
  .sp-only {
    display: block;
  }
}

/* =========================================
   Header
   ========================================= */
header.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  height: var(--header-height);
  transition: background-color var(--transition-normal), backdrop-filter var(--transition-normal), box-shadow var(--transition-normal);
  background-color: transparent;

  &.is-scrolled, &.is-active {
    background-color: var(--color-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  }

  .inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 5%;
    max-width: 1400px;
    margin: 0 auto;

    .logo {
      & a {
        font-family: var(--font-serif);
        font-size: 1.5rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        display: block;
      }

      & img {
        height: 70px;
        width: auto;
        display: block;
      }
    }

    .nav {
      display: flex;
      align-items: center;
      margin-left: auto;
      margin-right: 2rem;

      .nav-list {
        display: flex;
        gap: 2rem;

        & a {
          font-weight: 500;
          font-size: 0.95rem;
          position: relative;
          color: var(--color-text-main);
        }

        & a::after {
          content: '';
          position: absolute;
          bottom: -4px;
          left: 0;
          width: 0%;
          height: 2px;
          background-color: var(--color-accent);
          transition: width var(--transition-normal);
        }

        & a:hover::after {
          width: 100%;
        }
      }
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      width: 30px;
      height: 20px;
      position: relative;
      z-index: 101;

      & span {
        position: absolute;
        width: 100%;
        height: 2px;
        background-color: var(--color-surface);
        left: 0;
        transition: var(--transition-normal);

        &:nth-child(1) {
          top: 0;
        }

        &:nth-child(2) {
          top: 50%;
          transform: translateY(-50%);
        }

        &:nth-child(3) {
          bottom: 0;
        }
      }
    }
  }

  @media (max-width: 960px) {
    .inner {
      .nav {
        display: block;
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-normal), visibility var(--transition-normal);
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--color-bg);
        z-index: 99;
        padding: 40px 5%;
        overflow-y: auto;
        .nav-list {
          flex-direction: column;
          align-items: center;
          gap: 2rem;
          & a {
            font-size: 1.2rem;
          }
        }
      }
      .nav.is-active {
        opacity: 1;
        visibility: visible;
      }

      .cta {
        display: none;
      }

      .hamburger {
        display: block;
      }
      .hamburger.is-active span:nth-child(1) {
        top: 50%;
        transform: translateY(-50%) rotate(45deg);
      }
      .hamburger.is-active span:nth-child(2) {
        opacity: 0;
      }
      .hamburger.is-active span:nth-child(3) {
        bottom: 50%;
        transform: translateY(50%) rotate(-45deg);
      }
    }
  }
}

/* =========================================
   SP Floating Banner
   ========================================= */

  .floating-banner {
    display: block;
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal);

    &.is-active {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    & a {
      display: flex;
      justify-content: center;
      align-items: center;
      width: 90px;
      height: 90px;
      border-radius: 50%;
      background-color: var(--color-accent);
      color: #fff;
      font-weight: 700;
      font-size: 0.95rem;
      letter-spacing: 0.05em;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      transition: all var(--transition-fast);
      text-align: center;
      line-height: 1.3;
    }

    & a:hover {
      background-color: var(--color-accent-hover);
      transform: scale(1.05);
    }
  }

/* =========================================
   Footer
   ========================================= */
.footer {
  background-color: #54a2c9;
  padding: 80px 0 30px;
  .container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 5%;
  }

  .inner {
    display: flex;
    justify-content: space-between;
    margin-bottom: 60px;
    gap: 40px;

    .brand {
      max-width: 300px;

      .logo {
        font-family: var(--font-serif);
        font-size: 1.8rem;
        margin-bottom: 16px;
        color: #fff;
      }
    }
    .links-wrapper {
      display: flex;
      gap: 80px;
      .links-col {
        display: flex;
        flex-direction: column;
        gap: 16px;
      }
      .sns {
        display: flex;
        gap: 16px;
        & a {
          display: flex;
          align-items: center;
          justify-content: center;
          width: 40px;
          height: 40px;
          border-radius: 50%;
          background-color: var(--color-surface);
          color: var(--color-text-main);
          font-size: 0.9rem;
          font-weight: 600;
          transition: all var(--transition-normal);
          &:hover {
            background-color: var(--color-bg);
            transform: translateY(-3px);
          }
        }
      }
    }
  }
  .bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--color-surface);
    .copyright {
      color: #e0f2f9;
      font-size: 0.85rem;
      letter-spacing: 0.05em;
    }
  }
  @media (max-width: 768px) {
  .inner {
    flex-direction: column;
  }

  .links-wrapper {
    flex-direction: column;
    gap: 40px;
  }
  }
}