:root{--bg: #F5F5F7;--card-bg: #CFCFCF;--text: #0f1724;--muted: #b1b1b1;--accent: #F72C25;--header-bg: #CFCFCF;--header-border: #F5F5F7;--header-height: 64px;--glass-blur: 6px}.dark{--bg: #000000;--card-bg: #262626;--text: #CFCFCF;--muted: #353535;--accent: #F72C25;--header-bg: #262626;--header-border: #000000}body,.lightmode-background{background:var(--bg);color:var(--text);margin:0;font-family:Roboto,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.topbar{position:sticky;top:0;z-index:999;height:var(--header-height);display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0 1rem;background:var(--header-bg);border-bottom:1px solid var(--header-border);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));box-shadow:0 1px #00000008}.topbar .brand{display:flex;align-items:center;gap:.75rem;font-weight:700;color:var(--text);text-decoration:none}.topbar .brand a{color:inherit;text-decoration:none;font-size:1.125rem}.accent_color{color:var(--accent)}.accent_color_button{background-color:var(--accent);color:#0b1220;font-weight:700}.background{background-color:var(--bg)}.thick_text{color:var(--text);font-weight:700}.text{color:var(--text)}.card{background:var(--card-bg)}.textbox{background-color:var(--muted);border:1px solid var(--muted);color:var(--text)}.topbar nav{display:flex;gap:.75rem;align-items:center}.topbar nav a{color:var(--muted);text-decoration:none;font-weight:500;padding:.375rem .5rem;border-radius:6px}.topbar nav a:hover{color:var(--text);background:#00000008}.topbar .controls{display:flex;gap:.5rem;align-items:center}.theme-toggle{background:transparent;border:1px solid transparent;padding:.35rem .5rem;border-radius:8px;cursor:pointer;color:var(--muted);display:inline-flex;align-items:center;gap:.5rem}.theme-toggle:hover{background:#00000008;color:var(--text)}@media (max-width: 640px){.topbar nav{display:none}}