:root {
        --navy: #0e223f;
        --navy-mid: #1a3f75;
        --navy-light: #2f6fd6;
        --accent: #3182f6;
        --accent-dark: #1f6fe5;
        --accent-glow: rgba(49, 130, 246, 0.2);
        --teal: #7bb7ff;
        --red: #e5484d;
        --white: #fff;
        --off-white: #f8fbff;
        --gray-100: #f4f8ff;
        --gray-200: #dde8f7;
        --gray-300: #b9cae3;
        --gray-400: #8da1bf;
        --gray-600: #4c627f;
        --text-dark: #111827;
        --text-body: #2f4462;
        --r-sm: 8px;
        --r-md: 14px;
        --r-lg: 22px;
        --r-xl: 32px;
        --sh-sm: 0 2px 12px rgba(11, 23, 42, 0.08);
        --sh-md: 0 8px 32px rgba(11, 23, 42, 0.13);
        --sh-accent: 0 8px 28px rgba(49, 130, 246, 0.35);
        --nav-h: 76px;
        --max-w: 1140px;
        --py: 96px;
      }
      *,
      *::before,
      *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
      }
      html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
      }
      body {
      }
      body {
        font-family:
          "Pretendard",
          -apple-system,
          BlinkMacSystemFont,
          "Segoe UI",
          sans-serif;
        color: var(--text-body);
        background: #f6f9ff;
        overflow-x: hidden;
        line-height: 1.6;
      }
      a {
        text-decoration: none;
        color: inherit;
      }
      ul {
        list-style: none;
      }
      .wrap {
        max-width: var(--max-w);
        margin: 0 auto;
        padding: 0 32px;
      }

      /* ── BUTTONS ── */
      .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-family:
          "Pretendard",
          -apple-system,
          BlinkMacSystemFont,
          "Segoe UI",
          sans-serif;
        font-weight: 700;
        border-radius: var(--r-md);
        cursor: pointer;
        transition: all 0.22s ease;
        white-space: nowrap;
        border: 2px solid transparent;
        text-decoration: none;
      }
      .btn-p {
        background: var(--accent);
        color: #fff;
        box-shadow: var(--sh-accent);
        padding: 13px 26px;
        font-size: 15px;
      }
      .btn-p:hover {
        background: var(--accent-dark);
        transform: translateY(-2px);
        box-shadow: 0 14px 36px rgba(43, 126, 245, 0.45);
      }
      .btn-p.lg {
        padding: 16px 34px;
        font-size: 16px;
        border-radius: var(--r-lg);
      }
      .btn-s {
        background: #f3f7ff;
        color: var(--accent);
        border-color: #d9e8ff;
        padding: 13px 26px;
        font-size: 15px;
      }
      .btn-s:hover {
        background: #eaf2ff;
        border-color: #c5dcff;
        color: var(--accent-dark);
        transform: translateY(-2px);
      }
      .btn-s.lg {
        padding: 16px 34px;
        font-size: 16px;
        border-radius: var(--r-lg);
      }
      .btn-o {
        background: transparent;
        color: var(--navy);
        border-color: var(--navy-light);
        padding: 11px 22px;
        font-size: 14px;
      }
      .btn-o:hover {
        background: var(--navy);
        color: #fff;
        transform: translateY(-2px);
      }
      .btn:disabled,
      .btn[disabled] {
        background: var(--gray-200) !important;
        color: var(--gray-400) !important;
        border-color: transparent !important;
        box-shadow: none !important;
        cursor: not-allowed;
        transform: none !important;
      }

      /* ── NAV ── */
      .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--nav-h);
        background: rgba(255, 255, 255, 0.8);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(29, 58, 99, 0.09);
        z-index: 200;
        display: flex;
        align-items: center;
        transition:
          background 0.45s ease,
          border-color 0.45s ease,
          box-shadow 0.45s ease,
          height 0.45s ease,
          padding 0.45s ease;
      }
      .nav.scrolled {
        height: 66px;
        background: rgba(255, 255, 255, 0.92);
        box-shadow: 0 10px 26px rgba(16, 42, 78, 0.1);
      }
      .nav .wrap {
        transition:
          padding 0.4s ease,
          transform 0.4s ease;
      }
      .nav.scrolled .wrap {
        padding-top: 0;
        padding-bottom: 0;
      }
      .nav .wrap {
        max-width: var(--max-w);
        width: 100%;
        padding: 0 32px;
      }
      .nav__in {
        display: grid;
        grid-template-columns: auto 1fr auto;
        align-items: center;
        width: 100%;
        column-gap: 40px;
      }
      .nav__logo {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text-dark);
        font-weight: 800;
        font-size: 20px;
        letter-spacing: -0.32px;
        transition:
          font-size 0.38s ease,
          font-weight 0.38s ease,
          letter-spacing 0.38s ease,
          transform 0.38s ease,
          opacity 0.38s ease;
      }
      .logo-mark {
        display: block;
        height: 26px;
        width: auto;
        object-fit: contain;
        filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.18));
      }
      .nav__menu {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        gap: 0;
      }
      .nav__menu .nav__link {
        text-align: center;
        flex: 1;
      }
      .nav__link {
        font-size: 16px;
        color: #4a607e;
        font-weight: 700;
        transition:
          color 0.28s ease,
          font-size 0.38s ease,
          font-weight 0.38s ease,
          opacity 0.38s ease,
          transform 0.38s ease;
      }
      .nav__link:hover {
        color: var(--text-dark);
      }
      .nav.scrolled .nav__logo {
        font-size: 17px;
        font-weight: 700;
        letter-spacing: -0.24px;
        transform: translateY(-1px);
        opacity: 0.94;
      }
      .nav.scrolled .nav__link {
        font-size: 14px;
        font-weight: 500;
        color: #5a6f8e;
        transform: translateY(-1px);
      }
      .nav__actions {
        display: flex;
        align-items: center;
        gap: 10px;
        justify-content: flex-end;
        justify-self: end;
      }