:root{--app-bg: #f5f7fa;--app-text: #111827;--app-panel-bg: #ffffff;--app-panel-text: #111827;--app-muted-text: #6b7280;--app-border: #e5e7eb;--brand-blue: #2c5282;--brand-blue-dark: #1e3a5f;--accent-blue: #3b82f6;--link-blue-dark: #93c5fd;--header-height: 48px}body.theme-dark{--app-bg: #0b1220;--app-text: #e5e7eb;--app-panel-bg: #0f172a;--app-panel-text: #e5e7eb;--app-muted-text: #9ca3af;--app-border: #1f2a44}html[data-preload-theme=dark] body{background:#0b1220;color:#e5e7eb}*{box-sizing:border-box}body{margin:0;background:var(--app-bg);color:var(--app-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app-shell{min-height:100vh}.app-header{position:sticky;top:0;z-index:100;display:flex;align-items:center;gap:10px;height:var(--header-height);padding:0 16px;background:linear-gradient(135deg,var(--brand-blue) 0%,var(--brand-blue-dark) 100%);color:#fff}.hamburger-btn{flex-shrink:0;border:none;background:transparent;color:#fff;font-size:1.35rem;line-height:1;cursor:pointer;padding:6px 8px;border-radius:6px}.hamburger-btn:hover{background:#ffffff1f}.app-logo{flex:1;font-size:1.05rem;font-weight:700;cursor:pointer;-webkit-user-select:none;user-select:none;white-space:nowrap}.app-logo:focus-visible{outline:2px solid rgba(255,255,255,.6);border-radius:4px}.header-right{display:flex;align-items:center;gap:8px;flex-shrink:0}.back-btn{border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;padding:6px 12px;border-radius:6px;cursor:pointer;font-size:.875rem;font-weight:500;white-space:nowrap}.back-btn:hover{background:#ffffff1f}.theme-toggle{border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;padding:6px 12px;border-radius:6px;cursor:pointer;font-size:.875rem;font-weight:500;white-space:nowrap}.theme-toggle:hover{background:#ffffff1f}.nav-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:199}.nav-drawer{position:fixed;top:0;left:0;bottom:0;width:240px;background:var(--brand-blue-dark);color:#fff;z-index:200;transform:translate(-100%);transition:transform .22s ease;display:flex;flex-direction:column;padding:12px 0 24px}.nav-drawer.open{transform:translate(0)}.nav-drawer-close{align-self:flex-end;margin-right:12px;margin-bottom:8px;border:none;background:transparent;color:#ffffffb3;font-size:1.1rem;cursor:pointer;padding:4px 8px;border-radius:4px}.nav-drawer-close:hover{background:#ffffff1a;color:#fff}.nav-list{list-style:none;margin:0;padding:0}.nav-item{display:block;width:100%;text-align:left;border:none;background:transparent;color:#ffffffd1;font-size:.95rem;padding:11px 20px;cursor:pointer;border-left:3px solid transparent;transition:background .12s,color .12s}.nav-item:hover{background:#ffffff14;color:#fff}.nav-item.active{color:#fff;border-left-color:var(--accent-blue);background:#3b82f62e;font-weight:600}.tool-view{position:fixed;top:var(--header-height);left:0;right:0;bottom:0}.tool-view iframe{width:100%;height:100%;border:none;display:block}.home{max-width:1100px;margin:0 auto;padding:28px 20px 48px}.home-subtitle{color:var(--app-muted-text);margin:0 0 16px}.search-bar{display:block;width:100%;max-width:420px;margin-bottom:24px;padding:9px 14px;border:1px solid var(--app-border);border-radius:8px;font-size:.95rem;font-family:inherit;background:var(--app-panel-bg);color:var(--app-text);outline:none}.search-bar:focus{border-color:var(--accent-blue);box-shadow:0 0 0 3px #3b82f626}.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.tile{display:block;text-decoration:none;background:var(--app-panel-bg);color:var(--app-panel-text);border:1px solid var(--app-border);border-radius:10px;padding:18px 16px;min-height:140px;cursor:pointer;transition:border-color .15s}.tile:hover{border-color:var(--brand-blue)}body.theme-dark .tile:hover{border-color:var(--accent-blue)}.tile.is-placeholder{opacity:.55;cursor:default;pointer-events:none}.tile-icon{font-size:1.4rem}.tile-title{margin:10px 0 6px;font-size:1.05rem;font-weight:600}body.theme-dark .tile-title{color:#fff}.tile-description{margin:0;color:var(--app-muted-text);font-size:.92rem;line-height:1.4}