:root{color-scheme:light;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color:#0f172a;background-color:#f5f7fa;--brand: #0d7377;--brand-dark: #095456;--brand-light: #e6f4f4;--brand-secondary: #14a3a8;--surface: #ffffff;--border: #e2e8f0;--muted: #64748b;--success: #059669;--success-bg: #d1fae5;--warning: #d97706;--warning-bg: #fef3c7;--error: #dc2626;--error-bg: #fee2e2;--shadow: 0 1px 3px rgba(15, 23, 42, .08)}*{box-sizing:border-box}body{margin:0}a{color:var(--brand);text-decoration:none}h1,h2{margin:0}h1{font-size:1.75rem;font-weight:700}h2{font-size:1rem;font-weight:600}.app-shell{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--surface);border-right:1px solid var(--border);padding:24px 16px;display:flex;flex-direction:column;gap:24px}.sidebar__brand{display:flex;align-items:center;gap:12px;padding:0 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