:root{
  --bg: #f8f4ea;
  --panel: rgba(255, 252, 244, 0.92);
  --panel-strong: #fffaf0;
  --ink: #1f2421;
  --muted: #5e6a63;
  --accent: #0c6b58;
  --accent-strong: #084c3f;
  --accent-soft: #dff2e2;
  --border: rgba(31, 36, 33, 0.12);
  --warning: #e9772b;
  --success: #13795b;
  --danger: #b23d2f;
  --shadow: 0 18px 48px rgba(35, 45, 38, 0.08);
  --radius: 24px;
  --radius-sm: 16px;
  --font-display: "Avenir Next Condensed", "Trebuchet MS", sans-serif;
  --font-body: "Avenir Next", "Segoe UI", sans-serif;
}

*{
  box-sizing: border-box;
}

[hidden]{
  display: none !important;
}

body{
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top left, rgba(12, 107, 88, 0.16), transparent 32%),
    radial-gradient(circle at 100% 20%, rgba(233, 119, 43, 0.14), transparent 28%),
    linear-gradient(180deg, #fff8eb 0%, var(--bg) 42%, #edf6ef 100%);
}

a{
  color: inherit;
}

.page-shell{
  width: min(100%, 46rem);
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
}

.topbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0;
}

.brand{
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.topnav{
  display: flex;
  gap: 0.75rem;
  font-size: 0.95rem;
}

.topnav a{
  text-decoration: none;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid var(--border);
}

.session-strip{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0.8rem 0 1rem;
}

.session-stat{
  padding: 0.9rem 1rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.session-stat--active{
  background: linear-gradient(135deg, #e5f7ee 0%, #fff9ed 100%);
}

.session-label{
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.2rem;
}

.page-content{
  display: grid;
  gap: 1rem;
}

.panel{
  padding: 1.2rem;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.75);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero-panel{
  background:
    linear-gradient(135deg, rgba(255, 251, 240, 0.95), rgba(230, 246, 237, 0.88)),
    var(--panel);
}

.eyebrow{
  margin: 0 0 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
}

h1,
h2,
h3{
  margin: 0;
  font-family: var(--font-display);
  line-height: 1.05;
}

h1{
  font-size: clamp(2rem, 6vw, 3rem);
}

h2{
  font-size: 1.5rem;
}

.lead{
  margin: 0.8rem 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.muted{
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.panel-head{
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.stack{
  display: grid;
  gap: 0.85rem;
}

.field{
  display: grid;
  gap: 0.45rem;
}

.field-label{
  font-weight: 700;
}

.input{
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 0.9rem 1rem;
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
  font: inherit;
}

.input-textarea{
  resize: vertical;
}

.choice-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.65rem;
}

.choice-card{
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 0.95rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
  cursor: pointer;
}

.choice-card input{
  accent-color: var(--accent);
}

.die-button-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.die-button{
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 3.4rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.78);
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 800;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease, color 140ms ease;
}

.die-button:hover{
  transform: translateY(-1px);
}

.die-button input{
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.die-button span{
  position: relative;
  z-index: 1;
}

.die-button:focus-within{
  outline: 3px solid rgba(12, 107, 88, 0.22);
  outline-offset: 2px;
}

.die-button--selected{
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), #15906f);
  box-shadow: 0 10px 22px rgba(12, 107, 88, 0.22);
}

.button-row{
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 3rem;
  border: none;
  border-radius: 999px;
  padding: 0.85rem 1.2rem;
  text-decoration: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.button-primary{
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #15906f);
}

.button-secondary{
  color: var(--ink);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border);
}

.scanner-panel{
  display: grid;
  gap: 1rem;
}

.scanner-frame{
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  aspect-ratio: 4 / 5;
  background: #202824;
}

#scanner-video{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.scanner-mask{
  position: absolute;
  inset: 0;
  border: 1.4rem solid rgba(9, 15, 12, 0.35);
}

.scanner-mask::after{
  content: "";
  position: absolute;
  inset: 18% 12%;
  border: 4px solid rgba(235, 247, 240, 0.9);
  border-radius: 24px;
  box-shadow: 0 0 0 999px rgba(0, 0, 0, 0.18);
}

.pill{
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: rgba(12, 107, 88, 0.12);
  color: var(--accent-strong);
  font-size: 0.88rem;
  font-weight: 700;
}

.card{
  padding: 1rem;
  border-radius: 20px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
}

.question-options{
  display: grid;
  gap: 0.65rem;
}

.option-button{
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.95rem 1rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.75);
}

.option-button.option-correct{
  border-color: rgba(19, 121, 91, 0.36);
  background: rgba(19, 121, 91, 0.12);
}

.option-button.option-wrong{
  border-color: rgba(178, 61, 47, 0.36);
  background: rgba(178, 61, 47, 0.08);
}

.feedback{
  padding: 1rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.82);
}

.feedback-success{
  border-color: rgba(19, 121, 91, 0.28);
  background: rgba(19, 121, 91, 0.08);
}

.feedback-error{
  border-color: rgba(178, 61, 47, 0.28);
  background: rgba(178, 61, 47, 0.08);
}

.list{
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding-left: 1.2rem;
}

.summary-grid{
  display: grid;
  gap: 0.8rem;
}

@media (min-width: 42rem){
  .session-strip{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}