@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-ext-wght-normal-BOeWTOD4.woff2)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-wght-normal-DqGufNeO.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-ext-wght-normal-DlzME5K_.woff2)format("woff2-variations");unicode-range:U+1F??}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-wght-normal-CkhJZR-_.woff2)format("woff2-variations");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-vietnamese-wght-normal-CBcvBZtf.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-ext-wght-normal-DO1Apj_S.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-wght-normal-Dx4kXJAl.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Space Grotesk Variable;font-style:normal;font-display:swap;font-weight:300 700;src:url(/assets/space-grotesk-vietnamese-wght-normal-D0rl6rjA.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Space Grotesk Variable;font-style:normal;font-display:swap;font-weight:300 700;src:url(/assets/space-grotesk-latin-ext-wght-normal-D9tNdqV9.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Space Grotesk Variable;font-style:normal;font-display:swap;font-weight:300 700;src:url(/assets/space-grotesk-latin-wght-normal-BhU9QXUp.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(data:font/woff2;base64,d09GMgABAAAAAAfsABQAAAAAEAwAAAeCAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGhwbHhwoP0hWQVJbBmA/U1RBVIFiJyYAdC9qEQgKhGSEAAsgADCGCAE2AiQDOgQgBYlMB4EUDAcbLQ4onoexrSC/2ZyLAa8p8VHB8/x3Vue+V0hVJalMJg2nx/TCrQXxBeqLjQG7FyM1WEa/X1tEXN7cFz9EJEMmMUz3RihWSSKeQCbcIou0izz/C8v+fq3VfajEa9gDD11CImXS7qL/RJFVzC1qiB6KmKeD6TZdQ6IRGv78dL6uSVVCfgni5mzu7kcgQBgAEAQTQRCoL++STTYybkJxNfQxAAIAGu8OdEB9teW2jh4BpgDqFjAeSEByW3zFP0CBBgNMsMCGEDjgggdhiEAUAeIIED7ABTDUEnkIE9Q9ahFgKttcVhApo4ACB4qobHaccgDfEjFO6aaWUhjMLt2SyIvHKoDqoA4CSUwEIYQCEjhAO9R1G6keDeDZGjNo+AhxOjCEGTr1WeIF3kYBiLAOKvkJSMiKX0VdAyQt3SDJClCkxJCHkCzfqyVTriJZLcolS32JZHUekq2TYNkYtCtjYHMQXSxGjXDz2t/yLWXzDzxz+o3zFwDEaN23F+13pyMdQAEaSKAR9vcGq4A4MTSKCElGW+M7UcY7xqkggITb28ZJhlqc9q2twYKTt0NjixBgYvO9BIihEBLYuOFXQzfIQ7dXGUEEEgFDooBfAzqiQbpJrhiWSuKJCRFKYbHCyJKI2G5GiZbNAvgAu5pc3vwx4G+g3aDkhklABiSz0BICXrYghtYhx/cdJ+44rY2oZ0aMNRFz3VZjb6W33F3gzltqtOCV8tTHSpOeXuItfvr5lCdfzFpqtEitvqdcdGGFd28ZqqC0tPbeChGXgrIlnhSWu/eUso4uKWFLugyDzQJhflY4659+WjQ++6x72WUMv9G8mw6QJl7BVxX5fe/kpUsOvnZwee9uQ0cGXYd0o89XB2748sDSnt8d2VphdOTTgceDVvOds0v9P/s7HPq15aGun/6Vllb56f1dl0t1LejqrNkpdRZsG8TOnM5vkBG5oiVyVGnS8LHps5cfNWJs6qKPfaNSxiQNBUm3cKNWROr0GSur7Za31k1vieq7LH11VF+jXdRIasRKflc7jkobm1Z9te1IyZA0pDkhLR98+H37Zf1c/8at+dB7x+7GfVyTfJMPiYztsnl59Y5l4j+0n1RXlpHnF3Tq7HecmNF/CJodEMAikruxiyJaGLvHOdAfoA+oDvpjBm2b91cHGRZMU9n25xEU0A8fgEEAdKI3Q1iDtc034sug5YVMkE2jsE+BIkwSoQ3gxXMqz9tELp48bd0cFKOKS7xYjEuXBnZP5ia7DyiO/X/YI+PQSbt2uSdqAkWL9nQbV1XB94/+uPfdZz8dnXYFBYrcTl2SIR/ybxJNJPz/Gupb0JaZeens2ekC7EKr8t+Ls/P5VJPYJdHKyqfg2nqU6bhlidzcddQV/7MmecTzJ5VPcKXkNKSEogHjYFx6QZ7rQ+FSe8njaiNuOnXS8H2ScQ619c2mC3VTtauL0rRbXd/CkSOP37FY9Zkjz8+GibYUMOEWF+RdrFS8Ecv1SHOpPUPZGEIpjPvFyU5cXKjd6OXqorTqy9GwRd++HVufPGnVsW+aO3vggKZ18jR9sXaTC1PWTEsVUaK0FkNySbTQDqlm2PfDjZcu4aalnSLKjnOoYQ0nUlqqXcGpPu/4VgV/xU2pAqW4BW3qzhQ8/hFKhV2qE3+BKAtDqBXjfgnVdH4y0wg5tbVNRenNdTWOrenWLcupQdmsbq5b+18piTe/xRdp1xbILxNPJGInm2z6hoB21Lal0i+ePTtd7B45+3XhFJ329evskXm7qurUVREotqSluSo/L29d3qDhI4YOQqWhI4YNvBNfsMHeXKemXrxQfKeuPOGRVayA3JtkJKEgbPp+dXUDluddutRYLFoXGXWX6N3WFaGLbQtRSitVYNacTNSdy7AaG/HSaUEANcBoGXNdcZvZsOqQ1icBDv21/gzAoYPHH/WDW0qNR3QTYKEAEHig6o13NXbND06CQPlRtYjGNnSktRc09k1mAMDvAlDKfQjgy6fssInlfzmNAjKkDxoxHOBLdVRAIVt9j4qo+hA1w9T1aNBNTUOTTNUHLbqokE+UAfJXCIGw/IxCSL5GRUJeR40rL/UxTm4Q08H6MbCs70ObuNyIIXrINHQYInF06UUlevTjbQzTh5upiDMzMMogUtEnjPs/Y7jAHCJeB0GBHh04tC6FiB6ZFB1oArUSIoFoqhzCeAN6lHwm0T4C3VVPWvjpSMXReuWesMEcoqrmgtNBGd2noWeV0hNAz9rFeShNJxHGsPa3HXeKTk8b55hahySYHaYKKFFLpCfN8rsoaJn01CR04Gkc+5k7KVTCmClX8Q10HCrUEkVlSX+XO33oQR9609tJ516H497WSobWs5Up6TLaS10/dessIskgJSLiDlWvHVUywpkQ7hdPZqGyiEF0uVQerVcPamT1A3eKXdyI1vG9OoflrSXihZ1qqGE3nhmAgiIbRCQgPLEPtOM3UQwTLYaYYomNlpA44opnjV6jkD6id80OOrzf6BzmMD6eEa1zKyeYG1fzfEf16V6jw9XYOaar1/b2kP/IYX8oR2mcFvv2GtBV3JXgd437AQAA)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-cyrillic-wght-normal-D73BlboJ.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-greek-wght-normal-Bw9x6K1M.woff2)format("woff2-variations");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-vietnamese-wght-normal-Bt-aOZkq.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-latin-ext-wght-normal-DBQx-q_a.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-latin-wght-normal-B9CIFXIH.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--font-body:"Inter Variable", system-ui, -apple-system, "Segoe UI", sans-serif;--font-display:"Space Grotesk Variable", "Inter Variable", system-ui, sans-serif;--font-mono:"JetBrains Mono Variable", ui-monospace, "SF Mono", Menlo, monospace;--r-sm:8px;--r-md:14px;--r-lg:22px;--gap:16px;--maxw:1080px;--lesson-w:760px;--ease:cubic-bezier(.2, .7, .2, 1);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f5f3ee;--bg-tint:#eceae2;--surface:#fff;--surface-2:#faf9f6;--ink:#14202b;--ink-2:#3b4a58;--muted:#667785;--line:#e2dfd5;--line-strong:#cfcabd;--primary:#0d8a7e;--primary-ink:#fff;--primary-soft:#d7f1ed;--accent:#d97706;--accent-soft:#fdecc8;--good:#16a34a;--good-soft:#dcf5e4;--bad:#dc3d3d;--bad-soft:#fde1e1;--shadow:0 1px 2px #14202b0d, 0 6px 20px -8px #14202b1f;--shadow-lg:0 2px 4px #14202b0f, 0 24px 48px -16px #14202b33;--technician:#1f9d63;--general:#2f6fe0;--extra:#8b4fd8;--compendium:#c2701a;--d-voltage:#e0484d;--d-current:#2f6fe0;--d-resist:#e08a0b;--d-power:#8b4fd8;--d-signal:#0d8a7e;--d-good:#16a34a;--d-bad:#dc3d3d;--d-ink:#14202b;--d-muted:#8795a1;--d-fill:#eef1f3;--d-fill-2:#dde3e8;--d-bg:#fff}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#0b1218;--bg-tint:#0f1820;--surface:#121c25;--surface-2:#162330;--ink:#e8eef3;--ink-2:#b9c7d3;--muted:#8397a8;--line:#213240;--line-strong:#2d4355;--primary:#2dd4bf;--primary-ink:#04201c;--primary-soft:#0f2f2c;--accent:#fbbf24;--accent-soft:#332706;--good:#4ade80;--good-soft:#0f2b1b;--bad:#ff7a7a;--bad-soft:#361517;--shadow:0 1px 2px #0000004d, 0 8px 24px -10px #00000080;--shadow-lg:0 2px 4px #0006, 0 28px 56px -16px #000000b3;--technician:#3ddc97;--general:#6aa3ff;--extra:#b98cff;--compendium:#f0a64b;--d-voltage:#ff6b70;--d-current:#6aa3ff;--d-resist:#ffb23d;--d-power:#b98cff;--d-signal:#2dd4bf;--d-good:#4ade80;--d-bad:#ff7a7a;--d-ink:#e8eef3;--d-muted:#7f93a4;--d-fill:#1b2a37;--d-fill-2:#243646;--d-bg:#0f1820}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#0b1218;--bg-tint:#0f1820;--surface:#121c25;--surface-2:#162330;--ink:#e8eef3;--ink-2:#b9c7d3;--muted:#8397a8;--line:#213240;--line-strong:#2d4355;--primary:#2dd4bf;--primary-ink:#04201c;--primary-soft:#0f2f2c;--accent:#fbbf24;--accent-soft:#332706;--good:#4ade80;--good-soft:#0f2b1b;--bad:#ff7a7a;--bad-soft:#361517;--shadow:0 1px 2px #0000004d, 0 8px 24px -10px #00000080;--shadow-lg:0 2px 4px #0006, 0 28px 56px -16px #000000b3;--technician:#3ddc97;--general:#6aa3ff;--extra:#b98cff;--compendium:#f0a64b;--d-voltage:#ff6b70;--d-current:#6aa3ff;--d-resist:#ffb23d;--d-power:#b98cff;--d-signal:#2dd4bf;--d-good:#4ade80;--d-bad:#ff7a7a;--d-ink:#e8eef3;--d-muted:#7f93a4;--d-fill:#1b2a37;--d-fill-2:#243646;--d-bg:#0f1820}}[data-license=technician]{--lic:var(--technician)}[data-license=general]{--lic:var(--general)}[data-license=extra]{--lic:var(--extra)}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition-duration:.001ms!important;animation-duration:.001ms!important}}body{background:var(--bg);color:var(--ink);font-family:var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-size:16px;line-height:1.6}h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.015em;margin:0;line-height:1.15}p{margin:0 0 .9em}a{color:var(--primary);text-underline-offset:3px}code{font-family:var(--font-mono);font-size:.9em}button{font:inherit;color:inherit;cursor:pointer}:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:6px}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.topbar{z-index:20;background:color-mix(in srgb, var(--bg) 82%, transparent);-webkit-backdrop-filter:saturate(1.4)blur(14px);backdrop-filter:saturate(1.4)blur(14px);border-bottom:1px solid var(--line);position:sticky;top:0}.topbar .wrap{align-items:center;gap:18px;height:60px;display:flex}.logo{color:var(--ink);font-family:var(--font-display);letter-spacing:-.02em;align-items:center;gap:10px;font-size:20px;font-weight:700;text-decoration:none;display:inline-flex}.logo svg{width:34px;height:34px}.logo b{color:var(--primary);font-weight:700}.nav{align-items:center;gap:4px;margin-left:auto;display:flex}.nav a,.nav button{white-space:nowrap;color:var(--ink-2);background:0 0;border:0;border-radius:999px;align-items:center;padding:7px 12px;font-size:14px;font-weight:600;text-decoration:none;transition:background .15s,color .15s;display:inline-flex}.nav a:hover,.nav button:hover{background:var(--bg-tint);color:var(--ink)}.nav a.active{background:color-mix(in srgb, var(--lic,var(--primary)) 16%, transparent);color:var(--ink)}.nav .dot{background:var(--lic);border-radius:50%;width:8px;height:8px;margin-right:7px;display:inline-block}.nav a .short{display:none}.icon-btn{place-items:center;width:36px;height:36px;display:grid;padding:0!important}.streak{color:var(--accent);background:var(--accent-soft);white-space:nowrap;border-radius:999px;padding:4px 10px;font-size:13px;font-weight:700}@media (width<=720px){.nav a .full{display:none}.nav a .short{display:inline}.nav .dot,.logo span{display:none}.nav{gap:2px}.nav a{padding:7px 9px;font-size:13px}.nav .dot{margin-right:5px}.topbar .wrap{gap:10px}}.btn{border:1px solid var(--line-strong);background:var(--surface);color:var(--ink);transition:transform .12s var(--ease), box-shadow .15s, background .15s, border-color .15s;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:12px 20px;font-size:15px;font-weight:650;text-decoration:none;display:inline-flex}.btn:hover{box-shadow:var(--shadow);border-color:var(--muted);transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn-primary{background:var(--lic,var(--primary));color:#fff;border-color:#0000}:root[data-theme=dark] .btn-primary{color:#04120e}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .btn-primary{color:#04120e}}.btn-primary:hover{filter:brightness(1.06);border-color:#0000}.btn-ghost{background:0 0}.btn[disabled]{opacity:.45;pointer-events:none}.btn-lg{border-radius:14px;padding:15px 26px;font-size:16px}.hero{padding:56px 0 28px;position:relative;overflow:hidden}.hero-grid{grid-template-columns:1.1fr .9fr;align-items:center;gap:40px;display:grid}.eyebrow{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--primary);margin-bottom:14px;font-size:12.5px;font-weight:600}.hero h1{letter-spacing:-.035em;font-size:clamp(36px,6vw,62px)}.hero h1 em{color:var(--primary);font-style:normal}.hero p.lead{color:var(--ink-2);max-width:34em;margin-top:18px;font-size:19px}.hero-art{aspect-ratio:1.25;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-lg);overflow:hidden}.hero-art svg{width:100%;height:100%;display:block}@media (width<=860px){.hero-grid{grid-template-columns:1fr}.hero-art{aspect-ratio:2;order:-1}.hero{padding-top:28px}}.section-title{margin:48px 0 18px;font-size:26px}.lic-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}@media (width<=900px){.lic-grid{grid-template-columns:1fr}}.lic-card{color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);transition:transform .2s var(--ease), box-shadow .2s, border-color .2s;flex-direction:column;gap:14px;padding:24px;text-decoration:none;display:flex;position:relative;overflow:hidden}.lic-card:before{content:"";background:var(--lic);height:5px;position:absolute;inset:0 0 auto}.lic-card:hover{box-shadow:var(--shadow-lg);border-color:color-mix(in srgb, var(--lic) 50%, var(--line));transform:translateY(-3px)}.lic-card h3{justify-content:space-between;align-items:baseline;font-size:28px;display:flex}.lic-card .tagline{color:var(--ink-2);margin:0}.lic-card .facts{grid-template-columns:1fr 1fr;gap:10px;margin:0;display:grid}.fact{background:var(--bg-tint);border-radius:10px;padding:9px 12px}.fact b{font-family:var(--font-display);font-size:20px;display:block}.fact span{color:var(--muted);font-size:12.5px}.lic-card .cta{color:var(--lic);justify-content:space-between;align-items:center;margin-top:auto;font-weight:650;display:flex}.valid{color:var(--muted);font-size:12.5px}.steps{counter-reset:s;grid-template-columns:repeat(3,1fr);gap:18px;display:grid}@media (width<=800px){.steps{grid-template-columns:1fr}}.step{border-radius:var(--r-md);background:var(--surface);border:1px solid var(--line);padding:22px}.step:before{counter-increment:s;content:counter(s);background:var(--primary-soft);width:30px;height:30px;color:var(--primary);font-weight:700;font-family:var(--font-display);border-radius:50%;place-items:center;margin-bottom:12px;display:grid}.step h3{margin-bottom:6px;font-size:19px}.step p{color:var(--ink-2);margin:0;font-size:15px}.footer{border-top:1px solid var(--line);color:var(--muted);margin-top:72px;padding:28px 0 48px;font-size:13.5px}.footer p{max-width:62em}.ring{width:var(--s,56px);height:var(--s,56px);flex:none;position:relative}.ring svg{width:100%;height:100%;transform:rotate(-90deg)}.ring .track{stroke:var(--line)}.ring .bar{stroke:var(--lic,var(--primary));transition:stroke-dashoffset .6s var(--ease)}.ring span{font-size:13px;font-weight:700;font-family:var(--font-display);place-items:center;display:grid;position:absolute;inset:0}.meter{background:var(--line);border-radius:99px;height:6px;display:flex;overflow:hidden}.meter i{background:var(--lic,var(--primary));height:100%;transition:width .5s var(--ease);display:block}.meter i.seen{background:color-mix(in srgb, var(--lic,var(--primary)) 38%, transparent)}.page-head{padding:36px 0 8px}.page-head .row{flex-wrap:wrap;align-items:center;gap:24px;display:flex}.page-head h1{font-size:clamp(30px,5vw,44px)}.page-head .meta{color:var(--ink-2);margin:6px 0 0}.badge{background:color-mix(in srgb, var(--lic) 16%, transparent);color:var(--ink);border-radius:99px;padding:3px 10px;font-size:12.5px;font-weight:650;display:inline-block}.actions{flex-wrap:wrap;gap:10px;margin:22px 0 8px;display:flex}.sub-head{flex-wrap:wrap;align-items:baseline;gap:12px;margin:38px 0 14px;display:flex}.sub-head h2{font-size:22px}.sub-head .sub-id{font-family:var(--font-mono);color:var(--lic);font-size:15px;font-weight:700}.sub-head .weight{color:var(--muted);margin-left:auto;font-size:13px}.group-grid{grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px;display:grid}.group-card{color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);transition:transform .18s var(--ease), box-shadow .18s, border-color .18s;flex-direction:column;gap:8px;padding:16px 18px;text-decoration:none;display:flex}.group-card:hover{box-shadow:var(--shadow);border-color:color-mix(in srgb, var(--lic) 55%, var(--line));transform:translateY(-2px)}.group-card .gid{font-family:var(--font-mono);color:var(--lic);justify-content:space-between;font-size:12.5px;font-weight:700;display:flex}.group-card h3{font-size:17px;line-height:1.25}.group-card p{color:var(--muted);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:13.5px;display:-webkit-box;overflow:hidden}.group-card .gstat{color:var(--muted);justify-content:space-between;margin-top:auto;font-size:12px;display:flex}.group-card .soon{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--bg-tint);border-radius:99px;padding:1px 7px;font-size:11px;font-weight:700}.history{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.hist{border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:6px 12px;font-size:13px;font-weight:650}.hist.pass{color:var(--good);border-color:color-mix(in srgb, var(--good) 40%, var(--line))}.hist.fail{color:var(--bad);border-color:color-mix(in srgb, var(--bad) 40%, var(--line))}.crumbs{color:var(--muted);flex-wrap:wrap;gap:8px;padding-top:22px;font-size:13.5px;display:flex}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--ink);text-decoration:underline}.lesson{max-width:var(--lesson-w);margin:0 auto;padding:8px 20px 40px}.lesson-head{padding:12px 0 6px}.lesson-head .gid{font-family:var(--font-mono);color:var(--lic);letter-spacing:.04em;font-size:14px;font-weight:700}.lesson-head h1{margin:6px 0 10px;font-size:clamp(30px,5vw,42px)}.lesson-head .blurb{color:var(--ink-2);margin:0;font-size:19px}.lesson-head .topics{color:var(--muted);border-top:1px dashed var(--line-strong);margin-top:14px;padding-top:14px;font-size:13px}.lesson-meta{flex-wrap:wrap;gap:8px;margin:14px 0 0;display:flex}.lesson-body{margin-top:22px}.lesson-body>p,.lesson-body>ul,.lesson-body>ol{font-size:17px}.lesson-body ul,.lesson-body ol{margin:0 0 .9em;padding-left:1.3em}.lesson-body li{margin:.25em 0}.lesson-body table{border-collapse:collapse;background:var(--surface);border-radius:var(--r-sm);border:1px solid var(--line);width:100%;margin:1em 0;font-size:15px;overflow:hidden}.lesson-body th,.lesson-body td{text-align:left;border-bottom:1px solid var(--line);padding:9px 13px}.lesson-body th{background:var(--bg-tint);font-family:var(--font-display);font-size:13.5px}.lesson-body tr:last-child td{border-bottom:0}.lesson-body strong{color:var(--ink)}.concept{counter-increment:concept;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);margin:26px 0;padding:22px 24px 18px;scroll-margin-top:80px}.lesson-body{counter-reset:concept}.concept-title{align-items:center;gap:12px;margin-bottom:12px;font-size:22px;display:flex}.concept-num{background:color-mix(in srgb, var(--lic) 18%, transparent);width:30px;height:30px;color:var(--lic);border-radius:9px;flex:none;place-items:center;font-size:15px;font-weight:700;display:grid}.concept-num:before{content:counter(concept)}.concept-body>:last-child{margin-bottom:0}.concept-body p,.concept-body li{font-size:16.5px}.concept-body ul,.concept-body ol{margin:0 0 .8em;padding-left:1.25em}.concept-qs{border-top:1px dashed var(--line);color:var(--muted);flex-wrap:wrap;align-items:center;gap:6px;margin-top:16px;padding-top:12px;font-size:12px;display:flex}.qchip{font-family:var(--font-mono);background:var(--bg-tint);color:var(--ink-2);border-radius:6px;padding:1px 7px;font-size:11.5px;text-decoration:none}.key{background:var(--primary-soft);border-left:4px solid var(--primary);border-radius:12px;align-items:baseline;gap:12px;margin:14px 0;padding:12px 16px;font-weight:600;display:flex}.key-tag{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--primary);flex:none;font-size:11.5px;font-weight:700}.callout{border:1px solid var(--line);background:var(--bg-tint);border-radius:12px;margin:14px 0;padding:12px 16px;font-size:15.5px}.callout>strong{font-family:var(--font-display);text-transform:uppercase;letter-spacing:.07em;margin-bottom:2px;font-size:13px;display:block}.callout>div>:last-child{margin-bottom:0}.callout-warn{background:var(--accent-soft);border-color:color-mix(in srgb, var(--accent) 40%, var(--line))}.callout-warn>strong{color:var(--accent)}.callout-tip>strong{color:var(--primary)}.mnemonic{border:1px dashed var(--accent);color:var(--ink);background:color-mix(in srgb, var(--accent-soft) 60%, transparent);border-radius:12px;margin:14px 0;padding:10px 16px;font-weight:600}.mnemonic-tag{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin-bottom:2px;font-size:11.5px;font-weight:700;display:block}.formula{background:var(--bg-tint);text-align:center;border:1px solid var(--line);border-radius:12px;margin:14px 0;padding:14px 18px}.formula code{color:var(--ink);font-size:20px;font-weight:600}.formula-label{letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:4px;font-size:11.5px;font-weight:700;display:block}.row{grid-template-columns:var(--cols);align-items:center;gap:20px;margin:12px 0;display:grid}.row>:first-child{min-width:0}@media (width<=640px){.row{grid-template-columns:1fr!important}}.term{background:var(--primary-soft);color:var(--ink);white-space:nowrap;border-radius:6px;padding:0 6px;font-weight:650}.lesson-foot{border-radius:var(--r-lg);background:linear-gradient(135deg, color-mix(in srgb, var(--lic) 14%, var(--surface)), var(--surface));border:1px solid var(--line);flex-direction:column;gap:16px;margin-top:36px;padding:24px;display:flex}.lesson-foot h2{font-size:22px}.lesson-foot p{color:var(--ink-2);margin:0}.pager{flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:20px;display:flex}.soon-box{border-radius:var(--r-lg);border:2px dashed var(--line-strong);color:var(--ink-2);text-align:center;margin:26px 0;padding:28px}.diagram{max-width:100%;margin:18px auto}.diagram svg{background:var(--d-bg);border:1px solid var(--line);border-radius:var(--r-md);width:100%;height:auto;display:block}.diagram{position:relative}@media (width<=640px){.diagram>svg{min-width:520px}.diagram{-webkit-overflow-scrolling:touch;border-radius:var(--r-md);scrollbar-width:thin;overflow-x:auto}.diagram>figcaption{position:sticky;left:0}.concept{padding:18px 16px 14px}}.diagram figcaption{color:var(--muted);text-align:center;margin-top:8px;font-size:13.5px}.diagram text{-webkit-user-select:none;user-select:none}.ctl-panel{border-radius:var(--r-md);background:var(--surface-2);border:1px solid var(--line);grid-template-columns:repeat(auto-fit,minmax(210px,1fr));align-items:end;gap:14px;margin:-6px 0 18px;padding:16px 18px;display:grid}.ctl-slider{--ctl:var(--primary);display:block}.ctl-top{justify-content:space-between;align-items:baseline;margin-bottom:6px;display:flex}.ctl-label{color:var(--ink-2);font-size:13px;font-weight:650}.ctl-value{font-family:var(--font-mono);color:var(--ctl);font-size:14px;font-weight:700}.ctl-slider input[type=range]{appearance:none;cursor:pointer;background:0 0;width:100%;height:26px;margin:0}.ctl-slider input[type=range]::-webkit-slider-runnable-track{background:linear-gradient(to right, var(--ctl) var(--pct), var(--line-strong) var(--pct));border-radius:99px;height:8px}.ctl-slider input[type=range]::-moz-range-track{background:linear-gradient(to right, var(--ctl) var(--pct), var(--line-strong) var(--pct));border-radius:99px;height:8px}.ctl-slider input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;background:var(--ctl);border:3px solid var(--surface);border-radius:50%;width:22px;height:22px;margin-top:-7px;box-shadow:0 1px 4px #00000059}.ctl-slider input[type=range]::-moz-range-thumb{background:var(--ctl);border:3px solid var(--surface);border-radius:50%;width:16px;height:16px;box-shadow:0 1px 4px #00000059}.ctl-readout{--ctl:var(--ink);flex-direction:column;display:flex}.ctl-readout-label{color:var(--muted);font-size:12.5px;font-weight:650}.ctl-readout-value{font-family:var(--font-display);color:var(--ctl);font-size:28px;font-weight:700;line-height:1.15}.ctl-readout-value small{color:var(--muted);margin-left:4px;font-size:15px;font-weight:600}.ctl-choice{background:var(--bg-tint);border:1px solid var(--line);border-radius:10px;flex-wrap:wrap;gap:2px;max-width:100%;padding:3px;display:inline-flex}.ctl-choice button{color:var(--ink-2);background:0 0;border:0;border-radius:8px;padding:6px 12px;font-size:13.5px;font-weight:650}.ctl-choice button[aria-checked=true]{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}.quiz{max-width:760px;margin:0 auto;padding:22px 20px 80px}.quiz-top{align-items:center;gap:14px;margin-bottom:18px;display:flex}.quiz-top .x{color:var(--muted);white-space:nowrap;font-size:14px;font-weight:600;text-decoration:none}.quiz-top .x:hover{color:var(--ink)}.quiz-bar{background:var(--line);border-radius:99px;flex:1;height:8px;overflow:hidden}.quiz-bar i{background:var(--lic,var(--primary));height:100%;transition:width .4s var(--ease);border-radius:99px;display:block}.quiz-count{font-family:var(--font-mono);color:var(--muted);white-space:nowrap;font-size:13px}.qcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:24px}.qmeta{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:14px;display:flex}.qid{font-family:var(--font-mono);color:var(--lic);background:color-mix(in srgb, var(--lic) 14%, transparent);border-radius:7px;padding:2px 9px;font-size:12.5px;font-weight:700}.qref{font-family:var(--font-mono);color:var(--muted);font-size:12px}.qtext{font-family:var(--font-display);letter-spacing:-.01em;margin:0 0 18px;font-size:21px;font-weight:600;line-height:1.35}.qfig{border-radius:var(--r-md);border:1px solid var(--line);text-align:center;background:#fff;margin:0 0 18px;padding:10px}.qfig img{max-width:100%;max-height:420px}.qfig figcaption{color:#667785;margin-top:4px;font-size:12px}.choices{gap:10px;display:grid}.choice{text-align:left;background:var(--surface-2);border:2px solid var(--line);width:100%;transition:border-color .12s, background .12s, transform .12s var(--ease);border-radius:14px;align-items:flex-start;gap:14px;padding:13px 16px;display:flex}.choice:hover:not([disabled]){border-color:var(--lic,var(--primary));transform:translate(2px)}.choice .letter{width:28px;height:28px;font-family:var(--font-mono);background:var(--bg-tint);color:var(--ink-2);border-radius:8px;flex:none;place-items:center;font-size:13.5px;font-weight:700;display:grid}.choice .ctext{padding-top:2px;font-size:16px}.choice[disabled]{cursor:default}.choice.selected{border-color:var(--lic,var(--primary));background:color-mix(in srgb, var(--lic,var(--primary)) 9%, var(--surface))}.choice.selected .letter{background:var(--lic,var(--primary));color:#fff}.choice.correct{border-color:var(--good);background:var(--good-soft)}.choice.correct .letter{background:var(--good);color:#fff}.choice.wrong{border-color:var(--bad);background:var(--bad-soft)}.choice.wrong .letter{background:var(--bad);color:#fff}.choice.dim{opacity:.55}.feedback{border:1px solid var(--line);animation:pop .28s var(--ease);border-radius:16px;margin-top:18px;padding:18px 20px}@keyframes pop{0%{opacity:0;transform:translateY(6px)}}.feedback.ok{background:var(--good-soft);border-color:color-mix(in srgb, var(--good) 40%, var(--line))}.feedback.no{background:var(--bad-soft);border-color:color-mix(in srgb, var(--bad) 40%, var(--line))}.feedback h4{text-transform:uppercase;letter-spacing:.08em;align-items:center;gap:8px;margin-bottom:8px;font-size:15px;display:flex}.feedback.ok h4{color:var(--good)}.feedback.no h4{color:var(--bad)}.feedback .why{margin:0;font-size:17px;font-weight:500}.feedback .trap{color:var(--ink-2);margin:10px 0 0;font-size:14.5px}.feedback .trap b{color:var(--accent)}.feedback .learn{margin-top:12px;font-size:14px;font-weight:650;display:inline-block}.feedback .rightans{color:var(--ink-2);margin:0 0 8px;font-size:14.5px}.why code,.rich code{background:color-mix(in srgb, var(--ink) 9%, transparent);border-radius:5px;padding:1px 6px}.quiz-actions{justify-content:space-between;align-items:center;gap:12px;margin-top:20px;display:flex}.kbd-hint{color:var(--muted);font-size:12.5px}kbd{font-family:var(--font-mono);border:1px solid var(--line-strong);background:var(--surface);border-radius:5px;padding:1px 6px;font-size:11.5px}@media (width<=640px){.kbd-hint{display:none}.qcard{padding:18px}.qtext{font-size:19px}.quiz-actions{justify-content:flex-end}}.summary{text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:36px 24px}.summary h2{margin:14px 0 6px;font-size:32px}.summary p{color:var(--ink-2)}.summary .actions{justify-content:center}.exam-nav{flex-wrap:wrap;gap:6px;margin:0 0 18px;display:flex}.exam-nav button{border:1px solid var(--line-strong);background:var(--surface);width:34px;height:34px;font-family:var(--font-mono);color:var(--ink-2);border-radius:9px;font-size:12.5px;font-weight:700;position:relative}.exam-nav button.answered{background:color-mix(in srgb, var(--lic) 16%, var(--surface));border-color:color-mix(in srgb, var(--lic) 55%, var(--line));color:var(--ink)}.exam-nav button.current{outline:2px solid var(--lic);outline-offset:1px}.exam-nav button.flagged:after{content:"";background:var(--accent);border:2px solid var(--bg);border-radius:50%;width:10px;height:10px;position:absolute;top:-3px;right:-3px}.timer{font-family:var(--font-mono);color:var(--muted);font-size:13px}.score-hero{flex-wrap:wrap;justify-content:center;align-items:center;gap:28px;margin:12px 0 24px;display:flex}.score-num{font-family:var(--font-display);font-size:64px;font-weight:700;line-height:1}.verdict{border-radius:99px;padding:5px 16px;font-weight:700;display:inline-block}.verdict.pass{background:var(--good-soft);color:var(--good)}.verdict.fail{background:var(--bad-soft);color:var(--bad)}.breakdown{text-align:left;gap:8px;max-width:520px;margin:22px auto 0;display:grid}.bd-row{grid-template-columns:40px 1fr 56px;align-items:center;gap:10px;font-size:14px;display:grid}.bd-row .sid{font-family:var(--font-mono);color:var(--lic);font-weight:700}.bd-row .meter{height:8px}.bd-row .meter i.bad{background:var(--bad)}.missed-list{text-align:left;gap:12px;margin-top:28px;display:grid}.missed{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 18px}.missed .qtext{margin-bottom:8px;font-size:16px}.missed .a{color:var(--ink-2);font-size:14.5px}.missed .a b{color:var(--good)}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);margin:16px 0;padding:22px 24px}.panel h2{margin-bottom:12px;font-size:20px}.setting{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:12px 0;display:flex}.setting:first-of-type{border-top:0}.setting small{color:var(--muted);display:block}.empty{text-align:center;color:var(--ink-2);padding:48px 20px}.loading{text-align:center;color:var(--muted);padding:80px 20px}.search{border:1px solid var(--line-strong);background:var(--surface);width:100%;font:inherit;color:var(--ink);border-radius:14px;padding:13px 18px}.qlist{gap:10px;margin-top:16px;display:grid}.qrow{background:var(--surface);border:1px solid var(--line);color:inherit;border-radius:12px;gap:12px;padding:12px 16px;text-decoration:none;display:flex}.qrow:hover{border-color:var(--lic)}.qrow .qid{align-self:flex-start}.credit{border-radius:var(--r-md);border:1px solid var(--line);background:var(--surface);text-align:center;flex-direction:column;gap:4px;margin-top:26px;padding:18px 20px;display:flex}.credit strong{color:var(--ink);font-family:var(--font-display);font-size:16px}.credit span{color:var(--muted);font-size:14px}.credit-domain{font-family:var(--font-mono);letter-spacing:.02em;color:var(--primary);margin-top:6px;font-size:13px;font-weight:600;text-decoration:none}.credit-domain:hover{text-decoration:underline}[data-license=compendium]{--lic:var(--compendium)}.nav .cmp-link .dot{background:var(--compendium)}.nav a.cmp-link.active{background:color-mix(in srgb, var(--compendium) 18%, transparent);color:var(--ink)}.cmp{grid-template-columns:308px minmax(0,1fr);align-items:start;max-width:1480px;margin:0 auto;display:grid}.cmp-side{overscroll-behavior:contain;border-right:1px solid var(--line);background:var(--bg);scrollbar-width:thin;height:calc(100vh - 60px);padding:16px 12px 24px 18px;position:sticky;top:60px;overflow-y:auto}.cmp-main{min-width:0;padding:0 28px 40px}.cmp-menu-btn,.cmp-drawer-head,.cmp-scrim{display:none}@media (width<=960px){.cmp{display:block}.cmp-menu-btn{border:1px solid var(--line-strong);background:var(--surface);border-radius:10px;align-items:center;gap:8px;margin:12px 20px 0;padding:8px 14px;font-size:14px;font-weight:650;display:inline-flex}.cmp-side{z-index:40;width:min(86vw,340px);height:100%;transition:transform .22s var(--ease);box-shadow:var(--shadow-lg);padding-top:0;position:fixed;top:0;bottom:0;left:0;transform:translate(-102%)}.cmp-side.open{transform:none}.cmp-drawer-head{background:var(--bg);z-index:2;justify-content:space-between;align-items:center;padding:14px 4px 10px;display:flex;position:sticky;top:0}.cmp-drawer-head button{background:0 0;border:0;padding:4px 8px;font-size:18px}.cmp-scrim{z-index:35;background:#00000073;display:block;position:fixed;inset:0}.cmp-main{padding:0 20px 40px}}.cmp-nav ul{margin:0;padding:0;list-style:none}.cmp-l1{margin-top:12px!important}.cmp-row{border-radius:8px;align-items:center;gap:2px;display:flex}.cmp-row:hover{background:var(--bg-tint)}.cmp-row .lbl{min-width:0;color:var(--ink);flex:1;padding:7px 8px;line-height:1.3;text-decoration:none}.cmp-row.l1 .lbl{font-size:14.5px;font-weight:700;font-family:var(--font-display);align-items:center;gap:10px;display:flex}.cmp-row.l1 .lbl svg{color:var(--compendium);flex:none}.cmp-row.l2 .lbl{color:var(--ink-2);font-size:13.5px;font-weight:600}.cmp-row .cnt{color:var(--muted);font-size:11.5px;font-family:var(--font-mono)}.cmp-row .tog{width:28px;height:28px;color:var(--muted);background:0 0;border:0;border-radius:6px;flex:none;place-items:center;display:grid}.cmp-row .tog i{border-bottom:2px solid;border-right:2px solid;width:7px;height:7px;transition:transform .15s;transform:rotate(-45deg)}.cmp-row .tog[aria-expanded=true] i{transform:rotate(45deg)}.cmp-l1>li.on>.cmp-row.l1{background:color-mix(in srgb, var(--compendium) 12%, transparent)}.cmp-l2{border-left:1px solid var(--line);margin:2px 0 6px 18px!important;padding-left:8px!important}.cmp-l3{margin:0 0 6px 8px!important}.cmp-l3 .art{color:var(--ink-2);border-left:2px solid #0000;border-radius:6px;padding:4px 8px;font-size:13px;line-height:1.35;text-decoration:none;display:block}.cmp-l3 .art:hover{background:var(--bg-tint);color:var(--ink)}.cmp-l3 .art.active{color:var(--ink);background:color-mix(in srgb, var(--compendium) 14%, transparent);border-left-color:var(--compendium);font-weight:650}.cmp-l3 .art.soon{opacity:.5}.cmp-total{color:var(--muted);margin:14px 8px 0;font-size:12px}.cmp-search{position:relative}.cmp-search input{border:1px solid var(--line-strong);background:var(--surface);width:100%;color:var(--ink);font:inherit;border-radius:10px;padding:9px 12px;font-size:14px}.cmp-search.big input{box-shadow:var(--shadow);border-radius:14px;padding:15px 18px;font-size:17px}.cmp-results{z-index:30;background:var(--surface);border:1px solid var(--line-strong);max-height:70vh;box-shadow:var(--shadow-lg);border-radius:12px;padding:6px;position:absolute;top:calc(100% + 6px);left:0;right:0;overflow:auto}.cmp-search:not(.big) .cmp-results{min-width:300px}.cmp-results a{color:var(--ink);border-radius:8px;padding:9px 11px;text-decoration:none;display:block}.cmp-results a:hover,.cmp-results a:focus{background:var(--bg-tint)}.cmp-results strong{font-size:14.5px;display:block}.cmp-results em{color:var(--compendium);margin:1px 0 2px;font-size:11.5px;font-style:normal;font-weight:600;display:block}.cmp-results span{color:var(--muted);font-size:12.5px;line-height:1.4;display:block}.cmp-none{color:var(--muted);padding:12px;font-size:14px}.cmp-page{max-width:1020px;padding-top:6px}.cmp-page.with-toc{grid-template-columns:minmax(0,1fr) 210px;gap:36px;max-width:1120px;display:grid}@media (width<=1180px){.cmp-page.with-toc{display:block}.toc{display:none}}.cmp-hero{padding:38px 0 6px}.cmp-hero .eyebrow{color:var(--compendium)}.cmp-hero h1{letter-spacing:-.03em;max-width:18em;font-size:clamp(30px,4.6vw,48px)}.cmp-hero .lead,.cmp-head .lead{color:var(--ink-2);max-width:40em;margin:14px 0 22px;font-size:18px}.cmp-h2{margin:40px 0 6px;font-size:22px}.cmp-h2 a{color:inherit;text-decoration:none}.cmp-h2 a:hover{color:var(--compendium)}.cmp-sub-blurb{color:var(--muted);margin:0 0 14px;font-size:14.5px}.cmp-head{align-items:flex-start;gap:16px;padding:8px 0 4px;display:flex}.cmp-head h1{font-size:clamp(28px,4vw,40px)}.cmp-head .lead{margin:8px 0}.ico{background:color-mix(in srgb, var(--compendium) 16%, transparent);width:46px;height:46px;color:var(--compendium);border-radius:13px;flex:none;place-items:center;display:grid}.cmp-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;display:grid}.cmp-card{color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);transition:transform .15s var(--ease), border-color .15s, box-shadow .15s;flex-direction:column;gap:4px;padding:14px 16px;text-decoration:none;display:flex}.cmp-card:hover{border-color:color-mix(in srgb, var(--compendium) 55%, var(--line));box-shadow:var(--shadow);transform:translateY(-2px)}.cmp-card strong{font-family:var(--font-display);font-size:15.5px;line-height:1.25}.cmp-card span{color:var(--muted);font-size:13px;line-height:1.4}.cmp-card.soon{opacity:.55}.cmp-sections{grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px;display:grid}.cmp-sec-card{color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);transition:transform .18s var(--ease), border-color .18s;flex-direction:column;gap:6px;padding:20px;text-decoration:none;display:flex}.cmp-sec-card:hover{border-color:color-mix(in srgb, var(--compendium) 55%, var(--line));transform:translateY(-3px)}.cmp-sec-card .ico{margin-bottom:4px}.cmp-sec-card strong{font-family:var(--font-display);font-size:19px}.cmp-sec-card p{color:var(--ink-2);margin:0;font-size:14px}.cmp-sec-card small{color:var(--muted);font-size:12.5px;line-height:1.5}.cmp-sec-card em{color:var(--compendium);margin-top:auto;padding-top:8px;font-size:13px;font-style:normal;font-weight:650}.cmp-cross{color:var(--muted);margin-top:36px;font-size:14.5px}.article{min-width:0;max-width:760px}.article .crumbs{padding-top:22px}.article-head{padding:10px 0 4px}.article-head h1{letter-spacing:-.03em;font-size:clamp(30px,4.6vw,42px)}.article-head .lead{color:var(--ink-2);margin:10px 0 0;font-size:19px}.article-body{margin-top:22px;font-size:17px}.article-body>p,.article-body li{font-size:17px}.article-body ul,.article-body ol{margin:0 0 1em;padding-left:1.3em}.article-body li{margin:.3em 0}.article-body h2{border-top:1px solid var(--line);margin:40px 0 12px;padding-top:22px;scroll-margin-top:80px;font-size:25px}.article-body h2:first-child{border-top:0;margin-top:8px;padding-top:0}.article-body h3{margin:26px 0 8px;scroll-margin-top:80px;font-size:19px}.article-body table{border-collapse:collapse;background:var(--surface);border:1px solid var(--line);width:100%;margin:1em 0;font-size:15px}.article-body th,.article-body td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:9px 13px}.article-body th{background:var(--bg-tint);font-family:var(--font-display);font-size:13.5px}.article-body tr:last-child td{border-bottom:0}.article-body code{background:color-mix(in srgb, var(--ink) 8%, transparent);border-radius:5px;padding:1px 6px}.article-body a{text-decoration-thickness:1px}.ref{font-weight:600}.ref-broken{border-bottom:2px dotted var(--bad)}.cmp-facts{border-radius:var(--r-md);background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--compendium);margin:18px 0;padding:14px 18px}.cmp-facts h4{text-transform:uppercase;letter-spacing:.1em;color:var(--compendium);font-size:12px;font-family:var(--font-mono);margin-bottom:8px}.cmp-facts dl{grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px 18px;margin:0;display:grid}.cmp-facts dt{color:var(--muted);font-size:12px;font-weight:650}.cmp-facts dd{margin:0;font-size:15.5px;font-weight:650}.related{margin-top:44px}.related h2{border-top:1px solid var(--line);padding-top:22px}.related ul{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;list-style:none;display:grid;padding:0!important}.related a{color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:12px;flex-direction:column;gap:3px;padding:12px 14px;text-decoration:none;display:flex}.related a:hover{border-color:var(--compendium)}.related strong{font-size:14.5px;font-family:var(--font-display)}.related span{color:var(--muted);font-size:12.5px;line-height:1.4}.examlink{background:var(--bg-tint);border:1px dashed var(--line-strong);border-radius:12px;flex-wrap:wrap;align-items:center;gap:8px 10px;margin:22px 0;padding:12px 16px;font-size:14px;display:flex}.examlink>strong{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--ink-2);font-size:11.5px}.examlink>span{color:var(--muted)}.exam-chip{background:var(--surface);border:1px solid var(--line-strong);color:var(--ink);border-radius:99px;align-items:center;gap:7px;padding:4px 11px;font-size:13px;font-weight:600;text-decoration:none;display:inline-flex}.exam-chip .dot{background:var(--lic);border-radius:50%;width:8px;height:8px}.exam-chip:hover{border-color:var(--lic)}.toc{align-self:start;padding-top:24px;font-size:13.5px;position:sticky;top:84px}.toc strong{text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-size:11.5px;font-family:var(--font-mono);margin-bottom:8px;display:block}.toc ul{border-left:1px solid var(--line);margin:0;padding:0;list-style:none}.toc button{text-align:left;width:100%;color:var(--muted);background:0 0;border:0;border-left:2px solid #0000;margin-left:-1px;padding:5px 12px;font-size:13.5px;line-height:1.35;display:block}.toc button:hover{color:var(--ink)}.toc button.on{color:var(--ink);border-left-color:var(--compendium);font-weight:650}.deeper{border-radius:var(--r-lg);border:1px solid var(--line);background:color-mix(in srgb, var(--compendium) 7%, var(--surface));margin-top:30px;padding:18px 20px}.deeper h2{margin-bottom:4px;font-size:18px}.deeper p{color:var(--muted);margin:0 0 10px;font-size:14px}.deeper ul{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.deeper a{background:var(--surface);border:1px solid var(--line-strong);color:var(--ink);border-radius:99px;padding:6px 12px;font-size:13.5px;font-weight:600;text-decoration:none;display:inline-block}.deeper a:hover{border-color:var(--compendium)}.cmp-promo{color:inherit;border-radius:var(--r-lg);border:1px solid color-mix(in srgb, var(--compendium) 40%, var(--line));background:linear-gradient(120deg, color-mix(in srgb, var(--compendium) 13%, var(--surface)), var(--surface));box-shadow:var(--shadow);transition:transform .18s var(--ease);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px;margin-top:28px;padding:24px 28px;text-decoration:none;display:flex}.cmp-promo:hover{transform:translateY(-2px)}.cmp-promo .eyebrow{color:var(--compendium);margin-bottom:6px}.cmp-promo h3{max-width:24em;font-size:24px}.cmp-promo p{color:var(--ink-2);max-width:44em;margin:8px 0 0}@media (width<=720px){.article-body table,.lesson-body table{-webkit-overflow-scrolling:touch;max-width:100%;display:block;overflow-x:auto}}