._lesson_fh2wx_1{--ink:#253b40;--muted:#536d75;--paper:#fff;--soft:#f2f6f6;--grid:#dce5e7;--axis:#8c9ea5;--teal:#167d79;--gold:#a86f11;--red:#b54d42;color:var(--ink);min-width:0;padding-bottom:72px}.dark ._lesson_fh2wx_1{--ink:#e1e9eb;--muted:#afc2c8;--paper:#151c21;--soft:#1b272e;--grid:#2e3b42;--axis:#77939f;--teal:#85d7c9;--gold:#edc572;--red:#f19890}._header_fh2wx_26{max-width:98ch;padding:32px 0}._header_fh2wx_26 h1{letter-spacing:-.035em;font-size:clamp(28px,3.8vw,44px);font-weight:500;line-height:1.35}._header_fh2wx_26 p{color:var(--muted);margin:20px 0;font-size:18px;line-height:1.9}._back_fh2wx_42{align-items:center;gap:7px;margin-top:25px;font-size:14px;display:inline-flex}._nav_fh2wx_49{border-block:1px solid var(--border);color:var(--muted);flex-wrap:wrap;gap:14px 28px;padding:19px 0;font-size:14px;display:flex}._section_fh2wx_58{padding-top:36px;scroll-margin-top:100px}._section_fh2wx_58+._section_fh2wx_58{border-top:1px solid var(--border);margin-top:32px}._section_fh2wx_58 h2{margin-bottom:23px;font-size:clamp(23px,2.7vw,31px);font-weight:500;line-height:1.5}._section_fh2wx_58 h2 span{color:var(--gold);margin-right:16px;font-family:Georgia,serif}._section_fh2wx_58 h3{margin:28px 0 14px;font-size:20px;font-weight:550;line-height:1.5}._section_fh2wx_58 p{max-width:100ch;margin:17px 0;font-size:16px;line-height:1.95}._equation_fh2wx_89{border-left:2px solid var(--gold);background:var(--soft);max-width:100%;margin:20px 0;padding:12px 18px;overflow-x:auto}._equation_fh2wx_89 .katex-display{text-align:left;margin:.4em 0}._equation_fh2wx_89 .katex-display>.katex{text-align:left}._note_fh2wx_104{border-left:3px solid var(--teal);background:var(--soft);margin:22px 0;padding:3px 22px}._model_fh2wx_110{background:var(--paper);border:1px solid var(--border);border-radius:8px;min-width:0;margin:26px 0;overflow:hidden}._panel_fh2wx_118{background:var(--soft);border-top:1px solid var(--border);padding:22px}._controls_fh2wx_123{flex-wrap:wrap;align-items:center;gap:16px 30px;display:flex}._range_fh2wx_129{flex:1;min-width:190px}._range_fh2wx_129 label{justify-content:space-between;gap:15px;margin-bottom:10px;font-size:14px;display:flex}._range_fh2wx_129 output{color:var(--gold);font-variant-numeric:tabular-nums}._range_fh2wx_129 input{width:100%;accent-color:var(--gold);min-height:28px}._buttons_fh2wx_149{flex-wrap:wrap;gap:9px;margin:18px 0;display:flex}._lesson_fh2wx_1 button{border:1px solid var(--axis);background:var(--paper);color:var(--ink);cursor:pointer;white-space:normal;border-radius:5px;height:auto;min-height:40px;padding:10px 13px;font-size:14px;line-height:1.5}._lesson_fh2wx_1 button[aria-pressed=true]{border-color:var(--gold);color:var(--gold)}._lesson_fh2wx_1 button:disabled{opacity:.4;cursor:default}:is(._lesson_fh2wx_1 button:focus-visible,._lesson_fh2wx_1 input:focus-visible,._lesson_fh2wx_1 summary:focus-visible){outline:2px solid var(--gold);outline-offset:4px}._lesson_fh2wx_1 button svg{width:15px;height:15px}._readout_fh2wx_186{font-family:var(--font-mono);overflow-wrap:anywhere;font-variant-numeric:tabular-nums;font-size:15px;line-height:1.85;display:block}._stage_fh2wx_194{min-width:0;padding:24px}._stage_fh2wx_194 h3{margin:0 0 12px;font-size:17px}._packets_fh2wx_202{flex-wrap:wrap;gap:12px;min-height:75px;margin-bottom:24px;display:flex}._packet_fh2wx_202{border:1px solid var(--teal);border-radius:5px;min-width:64px;padding:9px;font-size:12px}._dots_fh2wx_216{flex-wrap:wrap;gap:6px;max-width:126px;padding:7px 0;display:flex}._dot_fh2wx_216{box-sizing:border-box;border:1px solid color-mix(in srgb, var(--ink) 28%, transparent);background:var(--teal);border-radius:50%;flex:none;width:18px;height:18px}._loose_fh2wx_232 ._dot_fh2wx_216{background:var(--axis)}._remainder_fh2wx_235 ._dot_fh2wx_216{background:var(--gold)}._packet_fh2wx_202 ._dots_fh2wx_216{max-width:95px}._caption_fh2wx_241{border-top:1px solid var(--border);color:var(--muted);padding:12px 22px;font-size:14px;line-height:1.85}._tableWrap_fh2wx_248{max-width:100%;overflow-x:auto}._table_fh2wx_248{border-collapse:collapse;text-align:left;width:100%;margin:15px 0;font-size:15px}._table_fh2wx_248 th,._table_fh2wx_248 td{border-bottom:1px solid var(--border);white-space:nowrap;padding:12px 13px}._table_fh2wx_248 tr[data-active=true]{background:var(--soft);color:var(--gold)}._plot_fh2wx_269{width:100%;height:auto;max-height:250px;display:block}._plot_fh2wx_269 text{font:17px var(--font-sans);fill:var(--ink)}._barA_fh2wx_279{fill:color-mix(in srgb, var(--teal) 22%, var(--paper));stroke:var(--teal);stroke-width:1.5px}._barB_fh2wx_284{fill:color-mix(in srgb, var(--gold) 25%, var(--paper));stroke:var(--gold);stroke-width:1.5px}._removed_fh2wx_289{fill:color-mix(in srgb, var(--red) 18%, var(--paper));stroke:var(--red);stroke-width:1.5px;stroke-dasharray:5 4}._outline_fh2wx_295{stroke:var(--axis);stroke-width:1px;fill:none}._factorTable_fh2wx_300{gap:15px;padding:24px;display:grid}._factorRow_fh2wx_305{border-bottom:1px solid var(--border);grid-template-columns:85px repeat(2,minmax(0,1fr));align-items:center;gap:20px;padding-bottom:12px;display:grid}._chips_fh2wx_313{flex-wrap:wrap;gap:6px;display:flex}._chip_fh2wx_313{border:1px solid var(--axis);border-radius:5px;place-items:center;min-width:34px;min-height:34px;display:grid}._common_fh2wx_326{color:var(--teal);border-color:var(--teal);background:color-mix(in srgb, var(--teal) 10%, var(--paper))}._answer_fh2wx_331{border-block:1px solid var(--border);margin:20px 0;padding:18px 0}._answer_fh2wx_331 summary{cursor:pointer;color:var(--gold);font-size:17px;line-height:1.7}._answer_fh2wx_331 p{padding-inline:12px}._footer_fh2wx_345{border-top:1px solid var(--border);color:var(--muted);flex-wrap:wrap;gap:20px;margin-top:36px;padding-top:24px;font-size:14px;display:flex}@media (max-width:650px){._lesson_fh2wx_1{padding-inline:18px}._header_fh2wx_26{padding:25px 0}._header_fh2wx_26 p{font-size:16px}._section_fh2wx_58 p{font-size:15px}._section_fh2wx_58 h3{font-size:18px}._equation_fh2wx_89{padding:10px 12px;font-size:14px}._stage_fh2wx_194,._panel_fh2wx_118{padding:18px}._caption_fh2wx_241{padding:12px 18px}._plot_fh2wx_269 text{font-size:20px}._factorRow_fh2wx_305{grid-template-columns:50px repeat(2,minmax(0,1fr));gap:10px}._factorTable_fh2wx_300{padding:16px}._range_fh2wx_129{min-width:100%}._chip_fh2wx_313{min-width:28px;min-height:28px}._table_fh2wx_248{font-size:13px}._nav_fh2wx_49{gap:12px 17px}}