body {
  background: #0d182a;
}

.essay-shell {
  min-height: calc(100vh - 88px);
  display: grid;
  grid-template-columns: 96px 220px minmax(0, 1fr) 320px;
  gap: 0;
  background: #eef2f8;
  color: #1f2a3c;
}

.global-rail {
  background: #14233a;
  color: #e8eef8;
  padding: 14px 10px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.rail-logo {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #24476f;
  display: grid;
  place-items: center;
  font-weight: 700;
  margin: 0 auto 10px;
}

.rail-school {
  text-align: center;
  font-size: 11px;
  color: #b8c8de;
  margin: 0 0 14px;
}

.global-icons {
  display: grid;
  gap: 6px;
}

.icon-item {
  display: grid;
  justify-items: center;
  gap: 4px;
  padding: 8px 4px;
  border-radius: 8px;
  color: #d3dfef;
  font-size: 11px;
}

.icon-item span:first-child {
  font-size: 16px;
}

.icon-item .avatar {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 10px;
  background: rgba(255, 255, 255, 0.14);
}

.icon-item.active,
.icon-item:hover {
  background: rgba(255, 255, 255, 0.12);
}

.course-nav {
  background: #f7f9fc;
  border-right: 1px solid #d6dce7;
  padding: 20px 16px;
}

.course-tag {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #4b6587;
}

.course-nav h1 {
  margin: 4px 0;
  font-size: 24px;
  color: #1d2b40;
}

.course-sub {
  margin: 0 0 16px;
  color: #5f6f84;
  font-size: 13px;
}

.course-links {
  display: grid;
  gap: 3px;
}

.course-links a {
  border-radius: 6px;
  padding: 8px 10px;
  color: #1f2d44;
  font-size: 14px;
}

.course-links a:hover {
  background: #e8edf6;
}

.course-links a.active {
  background: #dce6f5;
  color: #14345a;
  font-weight: 600;
}

.course-main {
  padding: 24px 22px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.main-header {
  background: #ffffff;
  border: 1px solid #dbe2ec;
  border-radius: 8px;
  padding: 16px;
}

.crumb {
  margin: 0;
  font-size: 12px;
  color: #5f6e83;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.main-header h2 {
  margin: 4px 0 8px;
  font-size: 30px;
  color: #16253a;
}

.main-header p {
  margin: 0;
  color: #4e5f76;
  font-size: 15px;
}

.lms-card {
  background: #fff;
  border: 1px solid #dbe2ec;
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(18, 32, 54, 0.06);
  padding: 16px;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.card-head h3,
.result-header h3,
.utility-card h3,
.side-chat h3 {
  margin: 0;
  color: #182742;
}

.pill {
  font-size: 11px;
  color: #143b6a;
  background: #e6eef9;
  border: 1px solid #c8d8ee;
  border-radius: 999px;
  padding: 4px 8px;
}

.card-subtitle {
  margin: 6px 0 14px;
  color: #596c85;
  font-size: 13px;
}

.assessment-form {
  display: grid;
  gap: 10px;
}

.assessment-form label,
.chat-form label {
  color: #30445f;
  font-size: 13px;
  font-weight: 500;
}

.assessment-form textarea,
.assessment-form select,
.assessment-form input,
.chat-form textarea {
  width: 100%;
  border-radius: 6px;
  border: 1px solid #cfd8e6;
  background: #fff;
  color: #17253a;
  padding: 10px 11px;
  font: inherit;
}

.assessment-form textarea:focus,
.assessment-form select:focus,
.assessment-form input:focus,
.chat-form textarea:focus {
  outline: none;
  border-color: #2e5e95;
  box-shadow: 0 0 0 2px rgba(46, 94, 149, 0.12);
}

.assessment-form textarea {
  min-height: 86px;
  resize: vertical;
}

.assessment-form .essay-text {
  min-height: 220px;
}

.file-status {
  min-height: 18px;
  margin: 8px 0 0;
  color: #61748f;
  font-size: 12px;
}

.essay-btn {
  border: 1px solid #2d5c92;
  background: #2d5c92;
  color: #fff;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.essay-btn:hover {
  background: #274f7f;
}

.essay-btn.subtle {
  background: #fff;
  color: #294c76;
}

.processing {
  min-height: 24px;
  margin-top: 12px;
  color: #2d5c92;
  font-size: 13px;
}

.processing .pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  margin-right: 6px;
  background: #2d5c92;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.result-card {
  background: #f9fbff;
  border: 1px solid #d9e2ef;
  border-radius: 6px;
  padding: 10px;
}

.result-card h4 {
  margin: 0 0 7px;
  color: #243a58;
}

.result-card p,
.result-card li,
.detail-output p,
.detail-output li,
.side-chat p,
.utility-card p,
.utility-card li {
  color: #334860;
  font-size: 13px;
  line-height: 1.5;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
}

.detail-output {
  border-top: 1px solid #d9e2ef;
  margin-top: 10px;
  padding-top: 10px;
}

.rubric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.rubric-item {
  border: 1px solid #d9e2ef;
  background: #f9fbff;
  border-radius: 6px;
  padding: 10px;
}

.rubric-item .score {
  color: #2b5b91;
  margin-top: 4px;
  font-size: 12px;
}

.course-utility {
  background: #f2f5fa;
  border-left: 1px solid #d6deea;
  padding: 24px 16px;
  display: grid;
  gap: 12px;
  align-content: start;
}

.utility-card ul {
  margin: 8px 0 0;
  padding-left: 18px;
}

.chat-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 10px 0;
}

.chip {
  border: 1px solid #cfd8e6;
  background: #f7faff;
  color: #2b4f78;
  border-radius: 999px;
  padding: 5px 8px;
  font-size: 12px;
  cursor: pointer;
}

.chat-log {
  min-height: 180px;
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid #d9e2ef;
  border-radius: 6px;
  background: #fbfdff;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chat-message {
  padding: 7px 8px;
  border-radius: 6px;
  font-size: 12px;
  line-height: 1.4;
}

.chat-message.user {
  align-self: flex-end;
  background: #e6eef9;
  border: 1px solid #ccd9ec;
}

.chat-message.assistant {
  align-self: flex-start;
  background: #fff;
  border: 1px solid #d9e2ef;
}

.chat-form {
  margin-top: 8px;
  display: grid;
  gap: 8px;
}

.chat-form textarea {
  min-height: 78px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 1280px) {
  .essay-shell {
    grid-template-columns: 84px 210px minmax(0, 1fr);
  }

  .course-utility {
    grid-column: 2 / -1;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-utility .side-chat {
    grid-column: 1 / -1;
  }
}

@media (max-width: 980px) {
  .essay-shell {
    grid-template-columns: 76px minmax(0, 1fr);
  }

  .course-nav {
    grid-column: 1 / -1;
    border-right: 0;
    border-bottom: 1px solid #d6dce7;
  }

  .course-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .course-main,
  .course-utility {
    grid-column: 1 / -1;
  }
}

@media (max-width: 700px) {
  .essay-shell {
    grid-template-columns: 1fr;
  }

  .global-rail {
    display: flex;
    align-items: center;
    gap: 10px;
    overflow-x: auto;
  }

  .rail-school {
    display: none;
  }

  .global-icons {
    display: flex;
    gap: 8px;
  }

  .icon-item {
    min-width: 62px;
  }

  .course-links,
  .result-grid,
  .rubric-grid,
  .course-utility {
    grid-template-columns: 1fr;
  }
}