:root{color-scheme:light;--page:#f4f7f7;--surface:#ffffff;--border:#d6e0e0;--petrol:#0e4a54;--teal:#15818f;--text:#173135;--muted:#617a7d;--shadow:0 18px 48px rgba(14,74,84,0.12)}*{box-sizing:border-box}body,html{margin:0;min-height:100%;font-family:Segoe UI,system-ui,sans-serif;background:linear-gradient(180deg,#e6efef,#f4f7f7 28%,#f4f7f7);color:var(--text)}button,input{font:inherit}.portal-shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:100vh}.portal-sidebar{background:linear-gradient(180deg,var(--petrol) 0,var(--teal) 100%);color:white;padding:28px 20px}.portal-sidebar nav{display:grid;grid-gap:10px;gap:10px;margin-top:24px}.portal-link{padding:12px 14px;border-radius:16px;background:rgba(255,255,255,.1)}.portal-main{padding:24px;min-width:0}.portal-card{background:var(--surface);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow);padding:24px}.portal-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:18px;gap:18px}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(440px,100%);display:grid;grid-gap:16px;gap:16px}.field{display:grid;grid-gap:8px;gap:8px}.field input{width:100%;border:1px solid var(--border);border-radius:16px;padding:14px 16px;background:white}.button{border:0;border-radius:999px;padding:14px 18px;background:var(--petrol);color:white;cursor:pointer}.bottom-nav{display:none}.muted{color:var(--muted)}@media (max-width:900px){.portal-shell{grid-template-columns:1fr;padding-bottom:82px}.portal-sidebar{display:none}.portal-main{padding:18px}.bottom-nav{position:fixed;left:12px;right:12px;bottom:12px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:10px;gap:10px;background:rgba(255,255,255,.95);border:1px solid var(--border);border-radius:22px;padding:10px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.bottom-nav span{text-align:center;font-size:13px;color:var(--muted)}}