*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--color-bg:#1a1a1a;--color-surface:#212121;--color-sidebar:#171717;--color-border:#2e2e2e;--color-text:#ececec;--color-text-muted:#9a9a9a;--color-accent:#c0392b;--color-accent-hover:#e74c3c;--color-accent-subtle:#c0392b1f;--sidebar-width:240px;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono:"SF Mono", "Fira Code", "Consolas", monospace}html,body{height:100%;font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased;line-height:1.6}.app-layout{height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background:var(--color-sidebar);border-right:1px solid var(--color-border);flex-direction:column;flex-shrink:0;padding:24px 0;display:flex}.sidebar-logo{border-bottom:1px solid var(--color-border);margin-bottom:12px;padding:0 20px 24px}.sidebar-logo h2{letter-spacing:.5px;color:var(--color-accent);font-size:16px;font-weight:600}.sidebar-logo span{color:var(--color-text-muted);text-transform:uppercase;letter-spacing:1px;font-size:11px}.sidebar-nav{flex-direction:column;gap:2px;padding:0 8px;display:flex}.sidebar-nav a{color:var(--color-text-muted);border-radius:8px;align-items:center;gap:10px;padding:10px 12px;font-size:14px;text-decoration:none;transition:all .15s;display:flex}.sidebar-nav a:hover{background:var(--color-accent-subtle);color:var(--color-text)}.sidebar-nav a.active{background:var(--color-accent-subtle);color:var(--color-accent-hover);font-weight:500}.sidebar-nav a .nav-icon{text-align:center;width:20px;font-size:16px}.main-content{flex:1;max-width:860px;padding:48px 64px;overflow-y:auto}.main-content h1{color:var(--color-text);margin-bottom:32px;font-size:28px;font-weight:600}.main-content .subtitle{color:var(--color-text-muted);margin-bottom:32px;font-size:14px}.main-content p{color:var(--color-text-muted);margin-bottom:16px;font-size:15px;line-height:1.7}.main-content a{color:var(--color-accent-hover);text-decoration:none;transition:color .15s}.main-content a:hover{color:var(--color-text)}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;margin-bottom:20px;padding:24px}.card h2{color:var(--color-text);margin-bottom:12px;font-size:16px;font-weight:600}.badge{text-transform:uppercase;letter-spacing:.8px;background:var(--color-accent-subtle);color:var(--color-accent-hover);border-radius:20px;margin-bottom:24px;padding:4px 10px;font-size:11px;font-weight:500;display:inline-block}.mobile-header{background:var(--color-sidebar);border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding:12px 20px;display:none}.mobile-header h2{color:var(--color-accent);font-size:16px;font-weight:600}.menu-toggle{color:var(--color-text-muted);cursor:pointer;background:0 0;border:none;padding:4px;font-size:24px}.sidebar-overlay{z-index:99;background:#00000080;display:none;position:fixed;inset:0}@media (width<=768px){.app-layout{flex-direction:column;height:auto;min-height:100vh}.mobile-header{display:flex}.sidebar{z-index:100;height:100%;display:none;position:fixed;top:0;left:0}.sidebar.open{display:flex}.sidebar-overlay.open{display:block}.main-content{padding:24px 20px}}