/**
 * math-shared.css
 * ----------------------------------------------------------------------
 * Shared look for every Pink Slip Protocol Math Hub page (hub + topic
 * pages). Include after the Google Fonts import on each page.
 */
:root{
  --bg: #f6f7fb;
  --panel: #ffffff;
  --border: #e3e6ee;
  --blue: #2f6fed;
  --blue-bg: #ebf1fe;
  --purple: #7c5cff;
  --purple-bg: #f1edfc;
  --text: #1a1d29;
  --text-dim: #676c7e;
  --green: #1e9e5a;
  --green-bg: #e8f8ee;
  --red: #d6304a;
  --red-bg: #fdecef;
  --yellow: #b3790a;
  --yellow-bg: #fff3dd;
}
*{ margin:0; padding:0; box-sizing:border-box; }
body{
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  min-height: 100vh;
  padding: 32px 18px 70px;
}
.wrap{ max-width: 720px; margin: 0 auto; }

header{ margin-bottom: 26px; text-align: center; }
.eyebrow{ font-size: 12px; letter-spacing: 2px; color: var(--purple); text-transform: uppercase; font-weight: 700; margin-bottom: 6px; }
h1{ font-size: clamp(26px, 5vw, 36px); font-weight: 800; letter-spacing: -0.5px; }
h1 span{ color: var(--blue); }
.subline{ font-size: 14px; color: var(--text-dim); margin-top: 8px; }

.current-user-bar{
  display: flex; align-items: center; justify-content: center; gap: 10px;
  margin-top: 14px; font-size: 13px; color: var(--text-dim);
}
.current-user-bar b{ color: var(--text); }
.current-user-bar a{ color: var(--blue); font-weight: 600; text-decoration: none; cursor: pointer; }
.current-user-bar a:hover{ text-decoration: underline; }

.back-link{ display:inline-block; font-size: 13px; color: var(--blue); text-decoration:none; font-weight: 600; margin-bottom: 4px; }
.back-link:hover{ text-decoration: underline; }

.card{
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px; margin-bottom: 16px;
}

/* USER PICKER */
.user-grid{ display: grid; grid-template-columns: repeat(auto-fill, minmax(140px,1fr)); gap: 12px; margin-top: 6px; }
.user-card{
  border: 1px solid var(--border); border-radius: 12px; padding: 18px 14px; text-align: center;
  cursor: pointer; transition: border-color .15s ease, transform .1s ease;
}
.user-card:hover{ border-color: var(--blue); transform: translateY(-1px); }
.user-avatar{
  width: 46px; height: 46px; border-radius: 50%; background: var(--blue-bg); color: var(--blue);
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 18px;
  margin: 0 auto 8px;
}
.user-name{ font-weight: 700; font-size: 14px; }
.user-summary{ font-size: 11px; color: var(--text-dim); margin-top: 4px; }

.add-user-row{ display: flex; gap: 8px; margin-top: 18px; }
.add-user-row input{
  flex: 1; padding: 11px 14px; border: 1px solid var(--border); border-radius: 10px;
  font-family: inherit; font-size: 14px;
}
.add-user-row input:focus{ outline: none; border-color: var(--blue); }

/* TOPIC / CATEGORY GRID */
.topic-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 6px; }
@media (max-width: 520px){ .topic-grid{ grid-template-columns: 1fr; } }
.topic-card{
  border: 1px solid var(--border); border-radius: 12px; padding: 16px;
  cursor: pointer; transition: border-color .15s ease, transform .1s ease;
}
.topic-card:hover{ border-color: var(--blue); transform: translateY(-1px); }
.topic-card.selected{ border-color: var(--blue); background: var(--blue-bg); }
.topic-name{ font-size: 15px; font-weight: 700; }
.topic-desc{ font-size: 12px; color: var(--text-dim); margin-top: 4px; }
.topic-progress{ font-size: 11px; color: var(--text-dim); margin-top: 8px; }
.topic-progress b{ color: var(--green); }

/* CATEGORY CARDS (hub page — bigger, with icon accent) */
.category-grid{ display: flex; flex-direction: column; gap: 14px; margin-top: 6px; }
.category-card{
  border: 1px solid var(--border); border-radius: 14px; padding: 20px;
  cursor: pointer; transition: border-color .15s ease, transform .1s ease;
  display: block; text-decoration: none; color: inherit;
}
.category-card:hover{ border-color: var(--blue); transform: translateY(-1px); }
.category-card.disabled{ opacity: 0.55; cursor: default; }
.category-card.disabled:hover{ border-color: var(--border); transform: none; }
.category-title{ font-size: 18px; font-weight: 800; }
.category-desc{ font-size: 13px; color: var(--text-dim); margin-top: 4px; }
.category-progress{ font-size: 12px; color: var(--text-dim); margin-top: 10px; }
.category-progress b{ color: var(--green); }
.category-badge{
  display: inline-block; font-size: 10px; letter-spacing: 1px; text-transform: uppercase;
  font-weight: 700; padding: 3px 9px; border-radius: 20px; margin-top: 10px;
  background: var(--yellow-bg); color: var(--yellow);
}

.field-label{ font-size: 12px; font-weight: 700; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; margin: 18px 0 8px; }

.pill-row{ display: flex; gap: 8px; flex-wrap: wrap; }
.pill{
  border: 1px solid var(--border); background: var(--panel); border-radius: 20px;
  padding: 8px 16px; font-size: 13px; font-weight: 600; cursor: pointer; color: var(--text);
}
.pill.selected{ background: var(--blue); border-color: var(--blue); color: #fff; }

.btn{
  display: inline-block; border: none; border-radius: 10px; padding: 13px 22px;
  font-size: 14px; font-weight: 700; cursor: pointer; font-family: inherit;
}
.btn-primary{ background: var(--blue); color: #fff; }
.btn-primary:disabled{ background: #b9c6e8; cursor: not-allowed; }
.btn-secondary{ background: var(--purple-bg); color: var(--purple); }
.btn-ghost{ background: transparent; color: var(--text-dim); border: 1px solid var(--border); }
.btn-row{ display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }

/* SESSION SCREEN */
.session-top{ display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--text-dim); margin-bottom: 6px; }
.progress-bar{ height: 6px; background: var(--border); border-radius: 4px; overflow: hidden; margin-bottom: 22px; }
.progress-bar-fill{ height: 100%; background: var(--blue); transition: width .2s ease; }

.problem{ text-align: center; padding: 20px 0 8px; }
.problem-text{ font-size: clamp(26px, 6vw, 38px); font-weight: 800; letter-spacing: -0.5px; }
.problem-sub{ font-size: 14px; color: var(--text-dim); margin-top: 10px; line-height: 1.5; max-width: 500px; margin-left:auto; margin-right:auto; }

.answer-row{ display:flex; gap: 10px; justify-content: center; margin-top: 22px; flex-wrap: wrap; align-items: center; }
.answer-input{
  width: 110px; font-size: 22px; font-weight: 700; text-align: center; padding: 12px 10px;
  border: 2px solid var(--border); border-radius: 10px; font-family: inherit;
}
.answer-input:focus{ outline: none; border-color: var(--blue); }
.answer-label{ font-size: 11px; color: var(--text-dim); display:block; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }

.choice-row{ display: flex; gap: 8px; }
.choice-btn{
  font-size: 20px; font-weight: 700; padding: 12px 20px; border: 2px solid var(--border);
  border-radius: 10px; background: var(--panel); cursor: pointer; font-family: inherit; color: var(--text);
}
.choice-btn.selected{ border-color: var(--blue); background: var(--blue-bg); color: var(--blue); }

.feedback{ text-align: center; margin-top: 18px; font-size: 15px; font-weight: 700; min-height: 24px; }
.feedback.correct{ color: var(--green); }
.feedback.incorrect{ color: var(--red); }

.center-row{ display: flex; justify-content: center; gap: 10px; margin-top: 18px; }

/* RESULTS */
.score-hero{ text-align: center; padding: 10px 0 20px; }
.score-num{ font-size: 48px; font-weight: 800; }
.score-num.good{ color: var(--green); }
.score-num.mid{ color: var(--yellow); }
.score-num.low{ color: var(--red); }
.score-label{ font-size: 13px; color: var(--text-dim); margin-top: 4px; }

.missed-item{ border-top: 1px solid var(--border); padding: 12px 0; font-size: 13px; }
.missed-item .q{ font-weight: 700; }
.missed-item .a{ color: var(--text-dim); margin-top: 3px; }
.missed-item .a b{ color: var(--green); }

.hidden{ display: none !important; }

footer{ text-align:center; font-size: 11px; color: var(--text-dim); margin-top: 30px; }