:root {
    --icon--definition: url('data:image/svg+xml;charset=utf-8, <svg xmlns="http://www.w3.org/2000/svg" height="20px" viewBox="0 -960 960 960" width="18px"  ><path d="M200-120q-33 0-56.5-23.5T120-200v-560q0-33 23.5-56.5T200-840h560q33 0 56.5 23.5T840-760v560q0 33-23.5 56.5T760-120H200Zm0-640v560h560v-560h-80v280l-100-60-100 60v-280H200Zm0 560v-560 560Z"/></svg>');

    --icon--fact: url('data:image/svg+xml;charset=utf-8, <svg xmlns="http://www.w3.org/2000/svg" height="20px" viewBox="0 -960 960 960" width="18px"  ><path d="M480-80q-33 0-56.5-23.5T400-160h160q0 33-23.5 56.5T480-80ZM320-200v-80h320v80H320Zm10-120q-69-41-109.5-110T180-580q0-125 87.5-212.5T480-880q125 0 212.5 87.5T780-580q0 81-40.5 150T630-320H330Zm24-80h252q45-32 69.5-79T700-580q0-92-64-156t-156-64q-92 0-156 64t-64 156q0 54 24.5 101t69.5 79Zm126 0Z"/></svg>');

    --icon--theorem: url('data:image/svg+xml;charset=utf-8, <svg xmlns="http://www.w3.org/2000/svg" height="20px" viewBox="0 -960 960 960" width="18px"  ><path d="M620-163 450-333l56-56 114 114 226-226 56 56-282 282Zm220-397h-80v-200h-80v120H280v-120h-80v560h240v80H200q-33 0-56.5-23.5T120-200v-560q0-33 23.5-56.5T200-840h167q11-35 43-57.5t70-22.5q40 0 71.5 22.5T594-840h166q33 0 56.5 23.5T840-760v200ZM480-760q17 0 28.5-11.5T520-800q0-17-11.5-28.5T480-840q-17 0-28.5 11.5T440-800q0 17 11.5 28.5T480-760Z"/></svg>');

    --icon--observation: url('data:image/svg+xml;charset=utf-8, <svg xmlns="http://www.w3.org/2000/svg" height="20px" viewBox="0 -960 960 960" width="18px"  ><path d="M480-320q75 0 127.5-52.5T660-500q0-75-52.5-127.5T480-680q-75 0-127.5 52.5T300-500q0 75 52.5 127.5T480-320Zm0-72q-45 0-76.5-31.5T372-500q0-45 31.5-76.5T480-608q45 0 76.5 31.5T588-500q0 45-31.5 76.5T480-392Zm0 192q-146 0-266-81.5T40-500q54-137 174-218.5T480-800q146 0 266 81.5T920-500q-54 137-174 218.5T480-200Zm0-300Zm0 220q113 0 207.5-59.5T832-500q-50-101-144.5-160.5T480-720q-113 0-207.5 59.5T128-500q50 101 144.5 160.5T480-280Z"/></svg>');

    --icon--question: url('data:image/svg+xml;charset=utf-8, <svg xmlns="http://www.w3.org/2000/svg" height="20px" viewBox="0 -960 960 960" width="18px"  ><path d="M478-240q21 0 35.5-14.5T528-290q0-21-14.5-35.5T478-340q-21 0-35.5 14.5T428-290q0 21 14.5 35.5T478-240Zm-36-154h74q0-33 7.5-52t42.5-52q26-26 41-49.5t15-56.5q0-56-41-86t-97-30q-57 0-92.5 30T342-618l66 26q5-18 22.5-39t53.5-21q32 0 48 17.5t16 38.5q0 20-12 37.5T506-526q-44 39-54 59t-10 73Zm38 314q-83 0-156-31.5T197-197q-54-54-85.5-127T80-480q0-83 31.5-156T197-763q54-54 127-85.5T480-880q83 0 156 31.5T763-763q54 54 85.5 127T880-480q0 83-31.5 156T763-197q-54 54-127 85.5T480-80Zm0-80q134 0 227-93t93-227q0-134-93-227t-227-93q-134 0-227 93t-93 227q0 134 93 227t227 93Zm0-320Z"/></svg>');
  }

  .admonition.definition {
    border-color: rgb(43, 155, 70);
    font-size: 1em;
  }
  .admonition.definition > .admonition-title {
    background-color: rgba(43, 155, 70, 0.1);
    border-color: rgb(43, 155, 70);
    font-size: large;
  }
  .admonition.definition > .admonition-title::before {
    background-color: rgb(43, 155, 70);
    -webkit-mask-image: var(--icon--definition);
    mask-image: var(--icon--definition);
    height: 1.1em;
  }

  .admonition.fact {
    border-color: #FF7E00;
    font-size: 1em;
  }

  .admonition.fact > .admonition-title {
    background-color: rgba(255, 126, 0, 0.1);
    border-color: #FF7E00;
    font-size: large;
  }

  .admonition.fact > .admonition-title::before {
    background-color: #FF7E00;
    -webkit-mask-image: var(--icon--fact);
    mask-image: var(--icon--fact);
    height: 1.1em;
  }

  .admonition.theorem {
    border-color: #5D8AA8;
    font-size: 1em;
  }

  .admonition.theorem > .admonition-title {
    background-color: rgba(93, 138, 168, 0.1);
    border-color: #5D8AA8;
    font-size: large;
  }

  .admonition.theorem > .admonition-title::before {
    background-color: #5D8AA8;
    -webkit-mask-image: var(--icon--theorem);
    mask-image: var(--icon--theorem);
    height: 1.1em;
  }

  .admonition.observation {
    border-color: 	#414833;
    font-size: 1em;
  }

  .admonition.observation > .admonition-title {
    background-color: rgba(65, 72, 51, 0.1);
    border-color: #414833;
    font-size: large;
  }

  .admonition.observation > .admonition-title::before {
    background-color: #414833;
    -webkit-mask-image: var(--icon--observation);
    mask-image: var(--icon--observation);
    height: 1.1em;
  }

  .admonition.question {
    border-color: #74361c;
    font-size: 1em;
  }

  .admonition.question > .admonition-title {
    background-color: rgba(116, 54, 28, 0.1);
    border-color: #74361c;
    font-size: large;
  }

  .admonition.question > .admonition-title::before {
    background-color: #74361c;
    -webkit-mask-image: var(--icon--question);
    mask-image: var(--icon--question);
    height: 1.1em;
  }