:root {
            --c-bg:           #ffffff;
            --c-text:         #1d1d1f;
            --c-text-soft:    #6e6e73;
            --c-accent:       #0071e3;
            --c-accent-dark:  #0058b8;
            --c-border:       rgba(0, 0, 0, 0.08);

            --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display",
                             "Inter", "Helvetica Neue", sans-serif;
            --font-body:    -apple-system, BlinkMacSystemFont, "SF Pro Text",
                             "Inter", "Helvetica Neue", sans-serif;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-body);
            font-size: 17px;
            line-height: 1.6;
            color: var(--c-text);
            background: var(--c-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: var(--c-accent); text-decoration: none; }
        a:hover { color: var(--c-accent-dark); }

        .nav {
            position: fixed;
            top: 0; left: 0; right: 0;
            height: 54px;
            background: rgba(255, 255, 255, 0.86);
            backdrop-filter: saturate(180%) blur(20px);
            -webkit-backdrop-filter: saturate(180%) blur(20px);
            border-bottom: 1px solid var(--c-border);
            z-index: 100;
        }
        .nav-inner {
            max-width: 1140px;
            height: 100%;
            margin: 0 auto;
            padding: 0 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            text-decoration: none;
        }
        .nav-logo { display: block; height: 30px; width: auto; }
        .nav-back {
            font-size: 13px;
            color: var(--c-text-soft);
            text-decoration: none;
        }
        .nav-back:hover { color: var(--c-text); }

        main {
            flex: 1;
            width: 100%;
            max-width: 760px;
            margin: 0 auto;
            padding: 130px 22px 90px;
        }
        h1 {
            font-family: var(--font-display);
            font-size: clamp(34px, 5vw, 48px);
            font-weight: 650;
            letter-spacing: -0.025em;
            line-height: 1.1;
            margin-bottom: 34px;
        }
        h2 {
            font-family: var(--font-display);
            font-size: 26px;
            font-weight: 650;
            letter-spacing: -0.015em;
            margin: 44px 0 14px;
        }
        h3 {
            font-family: var(--font-display);
            font-size: 19px;
            font-weight: 650;
            margin: 28px 0 10px;
        }
        p { margin-bottom: 14px; }
        ul { margin: 0 0 14px 22px; }
        li { margin-bottom: 6px; }
        .caps { text-transform: uppercase; font-size: 15px; line-height: 1.65; font-weight: 700; color: var(--c-text); letter-spacing: .01em; margin: 14px 0; padding: 16px 20px; background: #f2f5f9; border-left: 4px solid var(--c-text); border-radius: 8px; }
        .caps strong { font-weight: 800; }

        footer {
            padding: 40px 22px;
            border-top: 1px solid var(--c-border);
            text-align: center;
            font-size: 13px;
            color: var(--c-text-soft);
        }
        footer a {
            color: var(--c-text-soft);
            margin: 0 12px;
        }
        footer a:hover { color: var(--c-text); }
        footer .copyright { margin-top: 12px; }
        footer .footer-disclaimer {
            max-width: 760px;
            margin: 16px auto 0;
            font-size: 12px;
            font-weight: 650;
            line-height: 1.55;
            color: var(--c-text-soft);
        }
        footer .footer-thanks {
            max-width: 760px;
            margin: 10px auto 0;
            font-size: 12px;
            font-weight: 650;
            line-height: 1.55;
            color: var(--c-text-soft);
        }