:root{--sidebar-bg:#0d3a54;--sidebar-text:#fff;--sidebar-hover:#164d6e;--bg-color:#f3f4f6;--text-main:#333;--card-bg:#fff;--color-green-light:#90d39e;--color-green:#1f9e4f;--color-red-light:#d67171;--color-red:#bb2828;--color-teal-light:#52a6b2;--color-teal:#00768c;--color-blue-light:#89abd5;--color-blue:#3b5a99;--color-yellow:#f2cf5b;--color-orange:#e28e35;--font-xs:15px;--font-sm:17px;--font-base:18px;--font-md:20px;--font-lg:23px;--font-xl:26px;--font-xxl:30px;--font-huge:40px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);height:100vh;font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif;display:flex;overflow:hidden}.layout-container{width:100%;height:100vh;display:flex}.sidebar{background-color:var(--sidebar-bg);width:280px;color:var(--sidebar-text);flex-direction:column;flex-shrink:0;display:flex;overflow-y:auto}.sidebar-header{font-size:var(--font-base);text-align:center;letter-spacing:.5px;border-bottom:1px solid #ffffff1a;padding:20px;font-weight:700}.sidebar-nav{flex-direction:column;padding:10px 0;display:flex}.sidebar-link{color:#e0e0e0;font-size:var(--font-sm);align-items:center;gap:12px;padding:14px 20px;text-decoration:none;transition:background-color .2s;display:flex}.sidebar-link:hover{background-color:var(--sidebar-hover);color:#fff}.main-content{flex-direction:column;flex:1;display:flex;overflow:hidden}.topbar{background-color:var(--card-bg);border-bottom:1px solid #ddd;flex-shrink:0;justify-content:space-between;align-items:center;height:65px;padding:0 20px;display:flex}.dashboard-scroll{flex:1;padding:20px;overflow-y:auto}.dashboard-grid{grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:20px;display:grid}.metric-card{color:#fff;border-radius:4px;flex-direction:column;justify-content:space-between;min-height:120px;padding:20px;display:flex;position:relative;overflow:hidden;box-shadow:0 2px 4px #0000001a}.metric-card .value{font-size:var(--font-huge);margin-bottom:5px;font-weight:300}.metric-card .label{font-size:var(--font-base)}.metric-card .icon{opacity:.7;position:absolute;top:15px;right:15px}.upload-zone{text-align:center;cursor:pointer;background-color:#fff;border:2px dashed #bbb;border-radius:8px;margin-bottom:20px;padding:40px;transition:border-color .2s}.upload-zone:hover{border-color:var(--sidebar-bg)}.upload-zone input{display:none}