:root {
  --ink: #12233a;
  --muted: #4d6078;
  --paper: #f4f7fb;
  --card: #ffffff;
  --line: #d5deea;
  --accent: #0f6a63;
  --accent-2: #d97706;
}
* { box-sizing: border-box; }
body.mb-home, body.mb-teacher {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background: radial-gradient(circle at top, #e8f3f1, var(--paper) 45%);
  min-height: 100vh;
}
.mb-hero, .mb-wrap, .mb-card { max-width: 920px; margin: 0 auto; padding: 2.5rem 1.25rem; }
.mb-hero h1, .mb-card h1, .mb-wrap h1 { font-size: 2.4rem; margin: 0 0 .6rem; }
.mb-kicker { letter-spacing: .08em; text-transform: uppercase; color: var(--accent); font-size: .8rem; }
.mb-actions, .mb-row { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.2rem; }
.mb-btn {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .55rem 1rem;
  cursor: pointer;
  color: inherit;
  text-decoration: none;
  font: inherit;
}
.mb-btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.mb-bar {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: .8rem 1.2rem;
  background: #12233a;
  color: #fff;
}
.mb-bar a, .mb-bar button { color: #fff; }
.mb-table { width: 100%; border-collapse: collapse; background: var(--card); }
.mb-table th, .mb-table td { border-bottom: 1px solid var(--line); padding: .55rem .4rem; text-align: left; font-size: .95rem; }
.mb-note, .mb-optional { color: var(--muted); font-size: .92rem; }
.mb-card, .mb-modal-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 10px 30px rgba(18,35,58,.08);
}
.mb-modal {
  position: fixed; inset: 0;
  background: rgba(18,35,58,.45);
  display: grid; place-items: center;
  z-index: 10000;
}
.mb-modal[hidden] { display: none; }
.mb-modal-card { width: min(420px, 92vw); position: relative; }
.mb-close { position: absolute; top: .4rem; right: .6rem; border: 0; background: none; font-size: 1.4rem; cursor: pointer; }
label { display: block; margin: .7rem 0; }
input, select {
  width: 100%;
  margin-top: .25rem;
  padding: .5rem .6rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}
.mb-error { color: #b42318; min-height: 1.2em; }
.mb-ok { color: var(--accent); }
.mb-link { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; }
.mb-banner {
  position: sticky; top: 0; z-index: 50;
  display: flex; justify-content: space-between; gap: 1rem; align-items: center;
  background: #12233a; color: #fff; padding: .45rem .8rem; font-family: Georgia, serif;
}
.mb-banner button, .mb-banner a { color: #fff; }
#mbScoreTabs { display: flex; gap: .4rem; margin: .6rem 0 1rem; flex-wrap: wrap; }
#mbScoreTabs button[aria-selected="true"] { background: var(--accent); color: #fff; }
#ratingPromptOverlay { display: none !important; }