:root {
      --bg: #f0fdfa;
      --bg2: #ecfeff;
      --card: #ffffff;
      --text: #0f172a;
      --muted: #64748b;
      --line: #dbeafe;
      --main: #14b8a6;
      --main-dark: #0f766e;
      --sky: #38bdf8;
      --orange: #f97316;
      --orange-dark: #c2410c;
      --shadow: 0 18px 45px rgba(15, 118, 110, .12);
      --radius: 24px;
    }

    * { box-sizing: border-box; }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(56, 189, 248, .22), transparent 34%),
        radial-gradient(circle at top right, rgba(249, 115, 22, .13), transparent 30%),
        linear-gradient(180deg, var(--bg), #fff 46%, var(--bg2));
      min-height: 100vh;
    }

    a { color: inherit; text-decoration: none; }

    .travel-app {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
      padding: 22px 0 56px;
    }

    .topbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      margin-bottom: 22px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 900;
      letter-spacing: -.04em;
      font-size: 22px;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 15px;
      background: linear-gradient(135deg, var(--main), var(--sky));
      display: grid;
      place-items: center;
      color: white;
      box-shadow: 0 12px 28px rgba(20, 184, 166, .26);
      font-size: 20px;
    }

    .home-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 14px;
      border: 1px solid rgba(20, 184, 166, .24);
      border-radius: 999px;
      background: rgba(255, 255, 255, .78);
      color: var(--main-dark);
      font-size: 14px;
      font-weight: 800;
      box-shadow: 0 8px 24px rgba(15, 118, 110, .08);
    }

    .hero {
      position: relative;
      overflow: hidden;
      border-radius: 32px;
      padding: 42px;
      background:
        linear-gradient(135deg, rgba(20, 184, 166, .96), rgba(56, 189, 248, .92)),
        url("data:image/svg+xml,%3Csvg width='220' height='220' viewBox='0 0 220 220' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='white' stroke-opacity='.18' stroke-width='2'%3E%3Cpath d='M20 80 C60 30 140 130 200 60'/%3E%3Cpath d='M10 150 C70 90 120 210 210 130'/%3E%3Ccircle cx='66' cy='60' r='8'/%3E%3Ccircle cx='162' cy='144' r='8'/%3E%3C/g%3E%3C/svg%3E");
      color: white;
      box-shadow: var(--shadow);
    }

    .hero::after {
      content: "";
      position: absolute;
      right: -70px;
      bottom: -90px;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: rgba(255,255,255,.17);
    }

    .hero-inner { position: relative; z-index: 1; }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(255,255,255,.18);
      font-size: 14px;
      font-weight: 800;
      backdrop-filter: blur(8px);
      margin-bottom: 16px;
    }

    h1 {
      margin: 0;
      font-size: clamp(34px, 5vw, 58px);
      line-height: 1.03;
      letter-spacing: -.06em;
    }

    .hero p {
      margin: 18px 0 0;
      max-width: 720px;
      font-size: clamp(17px, 2vw, 21px);
      line-height: 1.65;
      font-weight: 700;
      color: rgba(255,255,255,.93);
    }

    .layout {
      display: grid;
      grid-template-columns: 1fr 360px;
      gap: 22px;
      align-items: start;
      margin-top: 24px;
    }

    .panel,
    .result-panel {
      background: rgba(255,255,255,.88);
      border: 1px solid rgba(20,184,166,.15);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      backdrop-filter: blur(10px);
    }

    .panel { padding: 24px; }

    .question {
      padding: 22px 0;
      border-bottom: 1px solid #e2e8f0;
    }

    .question:first-child { padding-top: 0; }
    .question:last-child { border-bottom: 0; padding-bottom: 0; }

    .q-head {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: baseline;
      margin-bottom: 12px;
    }

    .q-title {
      margin: 0;
      font-size: 19px;
      font-weight: 900;
      letter-spacing: -.035em;
    }

    .q-note {
      flex: 0 0 auto;
      font-size: 13px;
      color: var(--muted);
      font-weight: 800;
    }

    .chips {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .chip {
      appearance: none;
      border: 1px solid #cbd5e1;
      background: #fff;
      border-radius: 999px;
      padding: 11px 14px;
      color: #334155;
      font-size: 15px;
      font-weight: 800;
      cursor: pointer;
      transition: .16s ease;
    }

    .chip:hover {
      border-color: var(--main);
      transform: translateY(-1px);
    }

    .chip.is-selected {
      border-color: transparent;
      background: linear-gradient(135deg, var(--main), var(--sky));
      color: white;
      box-shadow: 0 10px 22px rgba(20,184,166,.23);
    }

    .input-row {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 8px;
      margin-top: 12px;
    }

    .input-row input {
      width: 100%;
      min-height: 46px;
      border: 1px solid #cbd5e1;
      border-radius: 16px;
      padding: 0 14px;
      font-size: 15px;
      font-weight: 700;
      outline: none;
      background: #fff;
    }

    .input-row input:focus {
      border-color: var(--main);
      box-shadow: 0 0 0 4px rgba(20,184,166,.12);
    }

    .mini-btn {
      appearance: none;
      border: 0;
      border-radius: 16px;
      padding: 0 16px;
      background: #0f172a;
      color: white;
      font-weight: 900;
      cursor: pointer;
      white-space: nowrap;
    }

    .result-panel {
      position: sticky;
      top: 18px;
      padding: 22px;
    }

    .result-label {
      margin: 0 0 8px;
      font-size: 14px;
      font-weight: 900;
      color: var(--main-dark);
    }

    .query-preview {
      min-height: 96px;
      padding: 18px;
      border-radius: 20px;
      background: linear-gradient(180deg, #f8fafc, #ffffff);
      border: 1px solid #e2e8f0;
      font-size: 20px;
      line-height: 1.55;
      letter-spacing: -.03em;
      font-weight: 900;
      word-break: keep-all;
    }

    .hint {
      margin: 12px 0 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.55;
      font-weight: 700;
    }

    .actions {
      display: grid;
      gap: 10px;
      margin-top: 18px;
    }

    .action-btn {
      appearance: none;
      border: 0;
      border-radius: 18px;
      padding: 15px 16px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 950;
      letter-spacing: -.02em;
      transition: .16s ease;
    }

    .action-btn:hover { transform: translateY(-1px); }

    .primary {
      background: linear-gradient(135deg, var(--orange), #fb923c);
      color: white;
      box-shadow: 0 12px 26px rgba(249,115,22,.23);
    }

    .secondary {
      background: #ecfeff;
      color: #0e7490;
      border: 1px solid #bae6fd;
    }

    .ghost {
      background: #f8fafc;
      color: #475569;
      border: 1px solid #e2e8f0;
    }

    .util-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      margin-top: 10px;
    }

    .util-btn {
      appearance: none;
      border: 1px solid #e2e8f0;
      border-radius: 15px;
      background: #fff;
      padding: 11px 10px;
      font-weight: 900;
      color: #475569;
      cursor: pointer;
    }

    .cta-box {
      margin-top: 22px;
      padding: 20px;
      border-radius: 22px;
      background: #fff7ed;
      border: 1px solid #fed7aa;
      color: #9a3412;
      line-height: 1.6;
      font-weight: 800;
    }

    .footer {
      margin-top: 26px;
      text-align: center;
      color: var(--muted);
      font-size: 13px;
      font-weight: 700;
    }

    @media (max-width: 900px) {
      .travel-app { width: min(100% - 22px, 720px); padding-top: 14px; }
      .layout { grid-template-columns: 1fr; }
      .result-panel { position: static; }
      .hero { padding: 30px 24px; border-radius: 26px; }
      .panel { padding: 20px; }
      .q-head { display: block; }
      .q-note { display: block; margin-top: 5px; }
    }

    @media (max-width: 520px) {
      .topbar { align-items: flex-start; }
      .home-link { font-size: 13px; padding: 9px 11px; }
      .chip { width: calc(50% - 5px); padding: 11px 9px; }
      .input-row { grid-template-columns: 1fr; }
      .mini-btn { min-height: 44px; }
      .query-preview { font-size: 18px; }
    }