:root,:root[data-theme=dark]{--bg: #0f172a;--surface: #1e293b;--surface-2: #273449;--border: #334155;--text: #e2e8f0;--muted: #94a3b8;--accent: #38bdf8;--on-accent: #08131f;--good: #22c55e;--warn: #f59e0b;--bad: #ef4444;--glucose: #a855f7}:root[data-theme=light]{--bg: #f1f5f9;--surface: #ffffff;--surface-2: #f1f5f9;--border: #e2e8f0;--text: #0f172a;--muted: #64748b;--accent: #0284c7;--on-accent: #ffffff;--good: #16a34a;--warn: #d97706;--bad: #dc2626;--glucose: #9333ea}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}a{color:inherit;text-decoration:none}.app{display:flex;min-height:100vh}body{transition:background .15s ease,color .15s ease}.sidebar{width:200px;background:var(--surface);border-right:1px solid var(--border);padding:20px 12px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column}.nav{flex:1}.sidebar-footer{display:flex;flex-direction:column;gap:12px}.theme-toggle{background:var(--surface-2);color:var(--text);border:1px solid var(--border);padding:8px 12px;border-radius:8px;cursor:pointer;font-size:13px;text-align:left}.theme-toggle:hover{border-color:var(--accent)}.brand{font-weight:700;font-size:18px;padding:6px 10px 18px}.nav a{display:block;padding:10px 12px;border-radius:8px;color:var(--muted);margin-bottom:2px}.nav a.active,.nav a:hover{background:var(--surface-2);color:var(--text)}.main{flex:1;padding:24px 28px;max-width:1100px}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}h1{font-size:22px;margin:0}h2{font-size:16px;margin:0 0 12px;color:var(--muted);font-weight:600}.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px}.card.wide{grid-column:1 / -1}.stat-label{color:var(--muted);font-size:13px}.stat-value{font-size:28px;font-weight:700;margin-top:4px}.stat-unit{font-size:14px;color:var(--muted);font-weight:500;margin-left:4px}.stat-sub{color:var(--muted);font-size:12px;margin-top:4px}.ranges{display:flex;gap:6px}.ranges button{background:var(--surface);color:var(--muted);border:1px solid var(--border);padding:6px 12px;border-radius:8px;cursor:pointer;font-size:13px}.ranges button.active{background:var(--accent);color:var(--on-accent);border-color:var(--accent);font-weight:600}.date-range{display:flex;align-items:center;gap:8px;margin-bottom:16px;flex-wrap:wrap}.date-range input[type=date]{width:auto;margin:0;padding:6px 10px;font-size:13px}.link-btn{background:none;border:1px solid var(--border);color:var(--muted);padding:6px 12px;border-radius:8px;cursor:pointer;font-size:13px}.link-btn:hover{color:var(--text);border-color:var(--accent)}.big-glucose{font-size:56px;font-weight:800;line-height:1}.trend{font-size:20px;color:var(--muted)}.pill{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:600}.pill.good{background:#22c55e26;color:var(--good)}.pill.warn{background:#f59e0b26;color:var(--warn)}.pill.bad{background:#ef444426;color:var(--bad)}.muted{color:var(--muted)}.narrative{white-space:pre-wrap;line-height:1.6}.center{min-height:60vh;display:flex;align-items:center;justify-content:center}.login-box{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:28px;width:320px}input{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:15px;margin:10px 0}button.primary{width:100%;background:var(--accent);color:var(--on-accent);border:none;padding:10px;border-radius:8px;font-weight:700;cursor:pointer}button.primary:disabled{opacity:.6;cursor:default}select{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:15px}.settings-form{display:flex;flex-direction:column;gap:14px;max-width:560px}.settings-form h2{margin:0}.field{display:flex;flex-direction:column;gap:6px}.field>span{font-size:13px;color:var(--muted)}.field input,.field select{margin:0}.field-row{display:flex;gap:14px}.field-row .field{flex:1}.settings-actions{display:flex;align-items:center;gap:12px;margin-top:6px}.err{color:var(--bad);font-size:13px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:600}