/* The existing stylesheet remains the dark palette. */
.navlinks{margin-left:auto;gap:23px}.nav-controls{display:flex;align-items:center;gap:10px;flex-shrink:0}.nav{gap:23px}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;min-width:88px;padding:9px 12px;border:1px solid var(--line);border-radius:7px;background:transparent;color:var(--text);font-size:.875rem;font-weight:550;line-height:1.4}
.theme-toggle:hover{background:var(--panel2)}.theme-toggle svg{width:19px;height:19px;flex-shrink:0}.theme-toggle .sun-icon,.logo-on-light{display:none}
[data-theme="light"] .theme-toggle .sun-icon,[data-theme="light"] .logo-on-light{display:block}
[data-theme="light"] .theme-toggle .moon-icon,[data-theme="light"] .logo-on-dark{display:none}
:root[data-theme="light"]{--bg:#f8fafb;--panel:#fff;--panel2:#edf2f5;--line:#d3dfe6;--text:#192e43;--muted:#526778;--mint:#24634f;--ink:#153d2f;color-scheme:light}
[data-theme="light"] .header{background:#f8fafbf2;border-bottom-color:#dce5eb}
[data-theme="light"] .navlinks>a:not(.button){color:#465c6e}
[data-theme="light"] .navlinks>a:hover,[data-theme="light"] .navlinks>a[aria-current="page"]{color:#1d6048}
[data-theme="light"] .button{background:#24634f;color:#fff}
[data-theme="light"] .button:hover{background:#194d3d}
[data-theme="light"] .button.secondary{background:transparent;border-color:#849cab;color:#233f51}
[data-theme="light"] .button.secondary:hover{background:#e8eff2}
[data-theme="light"] .skip{background:#24634f;color:#fff}
[data-theme="light"] .hero{background:radial-gradient(ellipse at 81% 54%,#d2e9e570,transparent 52%)}
[data-theme="light"] .micro,[data-theme="light"] .visual-caption{color:#5a7181}
[data-theme="light"] .calc-window{background:#fff;border-color:#ccdce3;box-shadow:0 24px 65px #284b6117}
[data-theme="light"] .window-top{background:#eaf1f5;border-bottom-color:#d2dfe7;color:#405c6e}
[data-theme="light"] .window-top .divider{background:#b5c7d3}
[data-theme="light"] .demo-pill{border-color:#a8bfce;color:#405e72}
[data-theme="light"] .year{border-color:#c1d1dc;color:#456174;background:#f5f8fa}
[data-theme="light"] .total-label,[data-theme="light"] .total span{color:#5b7284}
[data-theme="light"] .cost-row{border-bottom-color:#e7edf1}
[data-theme="light"] .row-label{color:#496174}
[data-theme="light"] .window-foot{border-top-color:#d7e3e9;background:#f1f6f8;color:#536d80}
[data-theme="light"] .insight{box-shadow:0 10px 35px #295b4020;border-color:#b4d8c6}
[data-theme="light"] .hero-bottom{border-top-color:#d5e1e7;color:#536a7b}
[data-theme="light"] .hero-bottom b{color:#284456}
[data-theme="light"] .light-section{background:#ecf2f5}
[data-theme="light"] .step{border-bottom-color:var(--line)}
[data-theme="light"] .step-number{border-color:#b7d1c5;background:#edf5f0}
[data-theme="light"] .methods-section{background:#eaf1f5;border-color:#d6e2e9}
[data-theme="light"] .method-card{background:#fff;border-color:#cddce5}
[data-theme="light"] .method-card:first-child{background:linear-gradient(130deg,#e4f2e9,#f9fcfa);border-color:#a5cbb7}
[data-theme="light"] .method-note{color:#566f80}
[data-theme="light"] .knowledge-card .meta,[data-theme="light"] .reading-note{color:#5a7182}
[data-theme="light"] .cta-block{background:#cdebdc}
[data-theme="light"] .cta-block .button{background:#153b2f;color:#fff}
[data-theme="light"] .cta-block .button:hover{background:#245443}
[data-theme="light"] .footer-title{color:#233e51}
[data-theme="light"] .footer-links{color:#526b7d}
[data-theme="light"] .footer-bottom{color:#5b7384;border-top-color:#d3dfe6}
[data-theme="light"] .page-hero{background:radial-gradient(ellipse at 85% 40%,#d9e9e870,transparent 52%)}
[data-theme="light"] .breadcrumbs{color:#546d80}
[data-theme="light"] .breadcrumbs span{color:#708695}
[data-theme="light"] .article-nav{border-left-color:#bfced9}
[data-theme="light"] .article-nav a{color:#4d687b}
[data-theme="light"] .article-nav a:hover{color:#24634f}
[data-theme="light"] th{color:#244256}
[data-theme="light"] td{color:#4d6578}
[data-theme="light"] .faq summary{color:#233f53}
[data-theme="light"] label{color:#3d576a}
[data-theme="light"] input,[data-theme="light"] textarea{background:#f8fafb;border-color:#a6bbc9;color:#192e43}
[data-theme="light"] input::placeholder,[data-theme="light"] textarea::placeholder{color:#617b8e}
@media(max-width:1100px) and (min-width:821px){.nav{gap:15px}.navlinks{gap:16px}.navlinks>a{font-size:.83rem}.navlinks .button.small{padding:10px 13px;gap:14px}.theme-toggle{min-width:78px;padding:9px;font-size:.82rem}}
@media(max-width:950px) and (min-width:821px){.navlinks{gap:12px}.navlinks>a{font-size:.77rem}.brand img{width:110px}.theme-toggle{min-width:44px}.theme-label{display:none}}
@media(max-width:820px){.navlinks{margin-left:0;gap:18px}[data-theme="light"] .navlinks{background:#f8fafb}.nav-controls{margin-left:auto}.theme-toggle{min-width:88px}.theme-label{display:inline}}
@media(max-width:380px){.nav-controls{gap:7px}.theme-toggle{min-width:44px;padding:9px}.theme-label{display:none}.nav{gap:12px}}
@media print{.theme-toggle{display:none}}