.primary-button,
    .secondary-button,
    .ghost-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      border-radius: 8px;
      border: 1px solid transparent;
      font-size: 14px;
      font-weight: 900;
      line-height: 1.15;
      cursor: pointer;
      transition: transform 160ms ease, filter 160ms ease, background 160ms ease;
      white-space: nowrap;
    }

    .primary-button {
      padding: 0 18px;
      background: var(--accent);
      color: #fff;
    }

    .secondary-button {
      padding: 0 16px;
      border-color: var(--border);
      background: #fff;
      color: var(--ink);
    }

    .ghost-button {
      min-height: 40px;
      padding: 0 12px;
      color: var(--muted);
      background: transparent;
    }

    .primary-button:hover,
    .secondary-button:hover,
    .ghost-button:hover {
      transform: translateY(-1px);
      filter: brightness(0.98);
    }

    .button-icon {
      width: 18px;
      height: 18px;
      flex: none;
    }

    .modal {
      position: fixed;
      inset: 0;
      z-index: 30;
      display: none;
      align-items: center;
      justify-content: center;
      padding: 24px;
      background: rgba(23, 48, 45, 0.42);
      backdrop-filter: blur(5px);
    }

    .modal.open {
      display: flex;
    }

    .modal-dialog {
      width: min(680px, 100%);
      max-height: calc(100vh - 48px);
      overflow-y: auto;
      overscroll-behavior: contain;
      border: 1px solid rgba(255, 255, 255, 0.34);
      border-radius: 8px;
      background: #fff;
      box-shadow: 0 24px 70px rgba(20, 45, 39, 0.28);
    }

    .modal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 16px 18px;
      border-bottom: 1px solid var(--border);
    }

    .certificate {
      margin: 18px;
      padding: 26px;
      border: 1px solid rgba(19, 123, 114, 0.24);
      border-radius: 8px;
      background:
        linear-gradient(135deg, rgba(237, 248, 242, 0.96), rgba(255, 255, 255, 0.98)),
        radial-gradient(circle at 12% 18%, rgba(19, 123, 114, 0.1), transparent 32%);
    }

    .certificate-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      color: var(--accent);
      font-weight: 900;
    }

    .certificate-mark {
      display: grid;
      width: 58px;
      height: 58px;
      place-items: center;
      border: 1px solid rgba(19, 123, 114, 0.24);
      border-radius: 8px;
      background: #fff;
      font-size: 30px;
    }

    .certificate h2 {
      margin-top: 22px;
      font-size: 38px;
      line-height: 1.15;
    }

    .certificate-slogan {
      min-height: 82px;
      margin: 20px 0;
      padding: 18px;
      border-left: 4px solid var(--accent);
      background: rgba(255,255,255,0.72);
      color: #24413d;
      font-size: 28px;
      font-weight: 900;
      line-height: 1.35;
      word-break: keep-all;
      overflow-wrap: anywhere;
    }

    .certificate-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
    }

    .certificate-stat {
      padding: 12px;
      border: 1px solid var(--border);
      border-radius: 8px;
      background: #fff;
    }

    .certificate-stat span {
      display: block;
      color: var(--muted);
      font-size: 12px;
      font-weight: 800;
    }

    .certificate-stat strong {
      display: block;
      margin-top: 4px;
      font-size: 24px;
      line-height: 1;
    }

    .modal-actions {
      display: flex;
      justify-content: flex-end;
      gap: 10px;
      padding: 0 18px 18px;
    }

    .toast {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 40;
      display: none;
      max-width: min(360px, calc(100vw - 48px));
      padding: 12px 14px;
      border-radius: 8px;
      background: #17302d;
      color: #fff;
      font-size: 14px;
      font-weight: 800;
      box-shadow: var(--shadow);
    }

    .toast.show {
      display: block;
    }

    @media (max-width: 1120px) {
      .brand h1 {
        font-size: 38px;
      }

      .workspace,
      .main-grid {
        grid-template-columns: 1fr;
      }

      .control-panel {
        position: static;
      }

      .monitor-stack {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .impact-panel {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 720px) {
      .mobile-section-nav {
        display: block;
      }

      .app-shell {
        padding: 16px;
      }

      .topbar {
        align-items: stretch;
        flex-direction: column;
      }

      .brand {
        gap: 10px;
      }

      .brand-mark {
        width: 42px;
        height: 42px;
        font-size: 24px;
      }

      .brand h1 {
        font-size: 31px;
      }

      .title-korean {
        display: block;
      }

      .score-chip {
        width: 100%;
        text-align: left;
      }

      .monitor-stack,
      .activity-form,
      .activity-form-grid,
      .certificate-stats {
        grid-template-columns: 1fr;
      }

      .activity-form-row {
        grid-template-columns: 1fr;
      }

      .mission-card {
        grid-template-columns: auto 1fr 64px;
      }

      .sim-header,
      .monitor-header,
      .activity-header {
        align-items: flex-start;
        flex-direction: column;
      }

      .message-pill {
        max-width: none;
        text-align: left;
      }

      .aquarium {
        height: 380px;
        margin: 14px;
      }

      .primary-button,
      .secondary-button {
        width: 100%;
      }

      .modal-actions {
        flex-direction: column-reverse;
      }

      .certificate h2 {
        font-size: 30px;
      }

      .certificate-slogan {
        font-size: 22px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
      }

      .confetti {
        display: none !important;
      }

      .sim-celebrating::after {
        content: none;
        animation: none;
      }
    }
    .update-button { min-height: 36px; white-space: nowrap; }
    .inquiry-panel, .result-panel { margin-bottom: 18px; padding: 18px; }
    .inquiry-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
    .eyebrow { margin: 0 0 5px; color: var(--accent); font-size: 12px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
    .inquiry-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin-top: 16px; }
    .inquiry-card { min-height: 110px; padding: 13px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2); }
    .inquiry-card strong { font-size: 13px; }
    .inquiry-card p { margin: 8px 0 0; color: var(--muted); font-size: 12px; line-height: 1.45; }
    .research-select { width: 100%; min-height: 38px; margin-top: 10px; padding: 6px 8px; border: 1px solid var(--border); border-radius: 7px; background: #fff; color: var(--ink); font-weight: 800; }
    .reason-label { display: block; margin-top: 14px; color: var(--muted); font-size: 12px; font-weight: 900; }
    .research-reason { margin-top: 6px; min-height: 70px; }
    .inquiry-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; margin-top: 12px; }
    .helper-text { margin: 10px 0 0; color: var(--muted); font-size: 12px; font-weight: 800; }
    .phase-badge { display: inline-flex; min-height: 30px; align-items: center; padding: 5px 10px; border-radius: 999px; background: #f8f5ec; color: #604b27; font-size: 12px; font-weight: 900; white-space: nowrap; }
    .mission-card[data-state="기록 필요"] .mission-state-dot { background: var(--warn); box-shadow: 0 0 0 4px rgba(216, 149, 22, .16); }
    .explanation-panel { padding: 18px; }
    .explanation-panel p, .explanation-panel li { color: var(--muted); font-size: 12px; line-height: 1.55; }
    .explanation-panel p { margin: 12px 0 8px; }
    .explanation-panel ul { margin: 0; padding-left: 18px; }
    .comparison-grid { display: grid; gap: 8px; margin-top: 12px; }
    .comparison-row { display: grid; grid-template-columns: minmax(72px, .7fr) minmax(150px, 1.2fr) minmax(80px, .6fr); gap: 10px; align-items: center; padding: 10px 12px; border: 1px solid var(--border); border-radius: 7px; background: #fbfdfc; }
    .comparison-row span { color: var(--muted); font-size: 12px; font-weight: 900; }
    .comparison-row strong { font-size: 14px; }
    .comparison-row em { font-size: 12px; font-style: normal; font-weight: 900; text-align: right; }
    .comparison-row em.good { color: var(--success); }
    .comparison-row em.bad { color: var(--danger); }
    .prediction-summary { margin: 12px 0 0; padding: 12px; border-left: 3px solid var(--accent); background: #f4faf5; color: #20413b; font-size: 12px; font-weight: 800; line-height: 1.5; }
    .result-actions { justify-content: flex-start; }
    .gi-pulse:not(:disabled) { animation: gi-pulse 1.8s ease-in-out infinite; box-shadow: 0 0 0 0 rgba(19, 123, 114, .45); }
    @keyframes gi-pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(19, 123, 114, .38); } 50% { box-shadow: 0 0 0 7px rgba(19, 123, 114, 0); } }
    button:disabled, input:disabled { cursor: not-allowed; opacity: .52; }
    .update-list { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
    .update-list li { display: grid; gap: 5px; padding: 12px; border: 1px solid var(--border); border-radius: 7px; background: var(--surface-2); }
    .update-list span { color: var(--muted); font-size: 13px; line-height: 1.45; }
    @media (max-width: 900px) { .inquiry-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .topbar { flex-wrap: wrap; } }
    @media (max-width: 720px) { .inquiry-grid { grid-template-columns: 1fr; } .inquiry-actions { flex-direction: column; } .inquiry-actions button { width: 100%; } .comparison-row { grid-template-columns: 1fr 1fr; } .comparison-row em { text-align: left; } }