@import url('https://fonts.googleapis.com/css2?family=LINE+Seed+JP:wght@100;400;700;800&display=swap');

/* ===== Variables ===== */
    :root {
      --green:        #06C755;
      --green-dark:   #059a42;
      --green-light:  #e6faf0;
      --green-mid:    #d0f5e0;
      --amber:        #f59e0b;
      --amber-light:  #fffbeb;
      --text-dark:    #1a1a1a;
      --text-mid:     #444;
      --text-light:   #777;
      --border:       #e0e0e0;
      --bg:           #f7fffe;
      --white:        #fff;
      --radius:       10px;
      --radius-lg:    18px;
      --radius-xl:    26px;
      --shadow-sm:    0 2px 8px rgba(6,199,85,0.10);
      --shadow-md:    0 4px 24px rgba(6,199,85,0.14);
      --shadow-lg:    0 8px 40px rgba(6,199,85,0.18);
      --transition:   0.28s cubic-bezier(0.4,0,0.2,1);
    }

    /* ===== Reset ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: "LINE Seed JP", "Hiragino Sans", "Yu Gothic", sans-serif;
      background: var(--bg);
      color: var(--text-dark);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }
    img { max-width: 100%; display: block; }
    a { text-decoration: none; color: inherit; }

    /* ===== Header ===== */
    .site-header {
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
      padding: 14px 24px;
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: var(--shadow-sm);
    }
    .site-header__inner {
      max-width: 960px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-header__logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 17px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.01em;
    }
    .site-header__logo-icon {
      width: 32px;
      height: 32px;
      background: var(--green);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .site-header__logo-icon svg { width: 18px; height: 18px; }

    /* ===== Hero ===== */
    .hero {
      background: linear-gradient(150deg, #e6faf0 0%, #f0fff6 50%, #fff 100%);
      padding: 64px 24px 56px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -80px; right: -80px;
      width: 360px; height: 360px;
      background: radial-gradient(circle, rgba(6,199,85,0.12) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -60px; left: -60px;
      width: 280px; height: 280px;
      background: radial-gradient(circle, rgba(6,199,85,0.08) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero__eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--green);
      color: var(--white);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.1em;
      padding: 5px 16px;
      border-radius: 999px;
      margin-bottom: 20px;
    }
    .hero__title {
      font-size: clamp(1.5rem, 4vw, 2.2rem);
      font-weight: 800;
      line-height: 1.35;
      color: var(--text-dark);
      margin-bottom: 0;
      position: relative;
      z-index: 1;
    }
    .hero__title em {
      font-style: normal;
      color: var(--green);
    }
    .hero__title-sub {
      font-size: clamp(1rem, 2.5vw, 1.35rem);
      font-weight: 700;
      color: var(--text-mid);
      margin-top: 6px;
      position: relative;
      z-index: 1;
    }

    /* ===== Campaign Banner ===== */
    .campaign {
      max-width: 760px;
      margin: 40px auto 0;
      background: var(--white);
      border: 2px solid var(--green);
      border-radius: var(--radius-lg);
      padding: 24px 32px;
      position: relative;
      z-index: 1;
      box-shadow: var(--shadow-md);
    }
    .campaign__badge-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 12px;
      justify-content: center;
    }
    .campaign__badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 999px;
      letter-spacing: 0.06em;
    }
    .campaign__badge--green {
      background: var(--green-light);
      color: #0a6b2e;
    }
    .campaign__badge--amber {
      background: var(--amber-light);
      color: #7c4a00;
    }
    .campaign__headline {
      font-size: clamp(1rem, 2.5vw, 1.2rem);
      font-weight: 800;
      color: var(--text-dark);
      text-align: center;
      margin-bottom: 10px;
      line-height: 1.5;
    }
    .campaign__headline em {
      font-style: normal;
      color: var(--green);
    }
    .campaign__body {
      font-size: 14px;
      color: var(--text-mid);
      text-align: center;
      line-height: 1.8;
    }
    .campaign__deadline {
      display: inline-block;
      background: var(--amber-light);
      border: 1px solid #fbbf24;
      color: #7c4a00;
      font-size: 13px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 6px;
      margin-top: 10px;
    }

    /* ===== Videos Section ===== */
    .videos {
      max-width: 960px;
      margin: 0 auto;
      padding: 64px 24px 80px;
    }
    .videos__heading {
      text-align: center;
      margin-bottom: 48px;
    }
    .videos__heading h2 {
      font-size: clamp(1.2rem, 2.5vw, 1.5rem);
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .videos__heading p {
      font-size: 14px;
      color: var(--text-light);
    }

    .videos__grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    /* ===== Video Card ===== */
    .video-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border);
      transition: transform var(--transition), box-shadow var(--transition);
      cursor: pointer;
    }
    .video-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .video-card__thumb {
      position: relative;
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--green-light);
      overflow: hidden;
    }
    .video-card__thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform var(--transition);
    }
    .video-card:hover .video-card__thumb img {
      transform: scale(1.04);
    }
    .video-card__play {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(0,0,0,0.18);
      transition: background var(--transition);
    }
    .video-card:hover .video-card__play {
      background: rgba(0,0,0,0.28);
    }
    .video-card__play-btn {
      width: 60px;
      height: 60px;
      background: rgba(6,199,85,0.92);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 20px rgba(6,199,85,0.45);
      transition: transform var(--transition);
    }
    .video-card:hover .video-card__play-btn {
      transform: scale(1.1);
    }
    .video-card__play-btn svg {
      width: 24px;
      height: 24px;
      fill: var(--white);
      margin-left: 3px;
    }
    .video-card__tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: var(--green);
      color: var(--white);
      font-size: 11px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 999px;
      letter-spacing: 0.06em;
    }
    .video-card__body {
      padding: 20px 22px 22px;
    }
    .video-card__label {
      font-size: 11px;
      font-weight: 700;
      color: var(--green);
      letter-spacing: 0.08em;
      margin-bottom: 6px;
      text-transform: uppercase;
    }
    .video-card__title {
      font-size: 16px;
      font-weight: 800;
      color: var(--text-dark);
      line-height: 1.4;
      margin-bottom: 8px;
    }
    .video-card__desc {
      font-size: 13px;
      color: var(--text-light);
      line-height: 1.65;
    }
    .video-card__cta {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      margin-top: 14px;
      font-size: 13px;
      font-weight: 700;
      color: var(--green);
    }
    .video-card__cta svg {
      width: 14px;
      height: 14px;
      stroke: var(--green);
      stroke-width: 2.5;
      fill: none;
    }

    /* ===== CTA Section ===== */
    .cta-section {
      background: var(--green);
      padding: 56px 24px;
      text-align: center;
    }
    .cta-section h2 {
      font-size: clamp(1.1rem, 2.5vw, 1.4rem);
      font-weight: 800;
      color: var(--white);
      margin-bottom: 10px;
    }
    .cta-section p {
      font-size: 14px;
      color: rgba(255,255,255,0.85);
      margin-bottom: 28px;
    }
    .btn-white {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--white);
      color: var(--green-dark);
      font-size: 15px;
      font-weight: 800;
      padding: 14px 36px;
      border-radius: var(--radius-lg);
      box-shadow: 0 4px 16px rgba(0,0,0,0.12);
      transition: transform var(--transition), box-shadow var(--transition);
    }
    .btn-white:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.16);
    }
    .btn-white svg {
      width: 18px; height: 18px;
      stroke: var(--green-dark);
      stroke-width: 2.5;
      fill: none;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #1a1a1a;
      color: rgba(255,255,255,0.5);
      text-align: center;
      padding: 28px 24px;
      font-size: 13px;
    }

    /* ===== Modal ===== */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.82);
      z-index: 200;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.25s ease;
    }
    .modal-overlay.is-open {
      opacity: 1;
      pointer-events: all;
    }
    .modal {
      background: #000;
      border-radius: var(--radius-lg);
      overflow: hidden;
      width: 100%;
      max-width: 800px;
      position: relative;
      transform: translateY(20px) scale(0.97);
      transition: transform 0.28s cubic-bezier(0.4,0,0.2,1);
      box-shadow: 0 24px 80px rgba(0,0,0,0.6);
    }
    .modal-overlay.is-open .modal {
      transform: translateY(0) scale(1);
    }
    .modal__close {
      position: absolute;
      top: 12px;
      right: 12px;
      width: 36px;
      height: 36px;
      background: rgba(255,255,255,0.15);
      border: none;
      border-radius: 50%;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 10;
      transition: background var(--transition);
    }
    .modal__close:hover { background: rgba(255,255,255,0.28); }
    .modal__close svg {
      width: 18px; height: 18px;
      stroke: #fff;
      stroke-width: 2.5;
      fill: none;
    }
    .modal__video-wrap {
      position: relative;
      width: 100%;
      aspect-ratio: 16 / 9;
    }
    .modal__video-wrap iframe {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      border: none;
    }

    /* ===== Responsive ===== */
    @media (max-width: 640px) {
      .videos__grid { grid-template-columns: 1fr; }
      .campaign { padding: 20px 18px; }
      .hero { padding: 48px 20px 40px; }
    }