/* ChemLab — shared blocks + Periodic Table, Journal, Learn, Challenges, Encyclopedia */

/* ------------------------------------------------------------ shared blocks */

.mini-title {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.13em;
  color: var(--cyan); font-weight: 700; margin: 16px 0 7px;
}
.mini-title:first-child { margin-top: 0; }

.modal-lede { font-size: 0.95rem; color: var(--ink); }

.note-list { margin: 0; padding-left: 18px; display: grid; gap: 4px; }
.note-list li { font-size: 0.85rem; color: var(--ink-2); }
.note-list li::marker { color: var(--cyan); }

.callout {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 11px 13px; margin: 11px 0; border-radius: var(--radius-sm);
  border: 1px solid rgba(53,224,216,0.28); background: rgba(53,224,216,0.07);
  border-left-width: 3px;
}
.callout-icon { font-size: 1rem; line-height: 1.2; }
.callout p { margin: 0; color: var(--ink-2); }

.kv { display: grid; grid-template-columns: minmax(120px, 0.35fr) 1fr; gap: 1px; margin: 12px 0; }
.kv dt {
  padding: 8px 11px; font-size: 0.8rem; font-weight: 650; color: var(--cyan);
  background: rgba(53,224,216,0.07); border: 1px solid var(--line); border-right: 0;
}
.kv dd {
  margin: 0; padding: 8px 11px; font-size: 0.83rem; color: var(--ink-2);
  background: rgba(10,17,29,0.45); border: 1px solid var(--line);
}
.kv dt:first-of-type { border-top-left-radius: var(--radius-sm); }
.kv dd:first-of-type { border-top-right-radius: var(--radius-sm); }
.kv dt:last-of-type { border-bottom-left-radius: var(--radius-sm); }
.kv dd:last-of-type { border-bottom-right-radius: var(--radius-sm); }

/* charts */
.chart { padding: 11px 13px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: rgba(10,17,29,0.45); }
.chart-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.chart-title { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-3); font-weight: 700; }
.chart-svg-wrap { overflow-x: auto; }
.chart-svg { width: 100%; min-width: 260px; height: auto; overflow: visible; display: block; }
.chart-foot { margin: 8px 0 0; font-size: 0.76rem; line-height: 1.5; }
.chart-na { padding: 6px 0; }

.chart-donut { display: grid; gap: 6px; justify-items: center; }
.chart-donut svg { width: 128px; height: 128px; }

.stat-bars { display: grid; gap: 9px; margin-top: 10px; }
.stat-bar-head { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--ink-2); margin-bottom: 4px; }
.stat-bar-track { height: 6px; border-radius: 99px; background: rgba(126,168,214,0.14); overflow: hidden; }
.stat-bar-track i { display: block; height: 100%; border-radius: 99px; transition: width 0.6s var(--ease); }

.xp-track { height: 6px; border-radius: 99px; background: rgba(126,168,214,0.16); overflow: hidden; margin: 5px 0; }
.xp-track i { display: block; height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--cyan), var(--violet)); }

.tabs { display: flex; gap: 5px; padding: 4px; border-radius: 99px; border: 1px solid var(--line); background: var(--panel); }
.tab {
  padding: 7px 15px; border-radius: 99px; border: 0; background: transparent;
  color: var(--ink-2); cursor: pointer; font-size: 0.83rem; font-weight: 600;
}
.tab:hover { color: var(--ink); }
.tab.active { color: #05121a; background: linear-gradient(140deg, var(--cyan), #6fe3c6); }

/* ------------------------------------------------------------ periodic table */

.legend { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.legend-item {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  padding: 4px 10px; border-radius: 99px; font-size: 0.71rem; font-weight: 600;
  border: 1px solid var(--line); background: rgba(10,17,29,0.45); color: var(--ink-2);
  transition: all 0.15s var(--ease);
}
.legend-item i { width: 9px; height: 9px; border-radius: 3px; display: block; }
.legend-item:hover { color: var(--ink); border-color: var(--line-strong); }
.legend-item[aria-pressed='true'] { color: var(--ink); background: rgba(120,170,220,0.18); border-color: var(--line-strong); }

.ptable-scroll { overflow-x: auto; padding-bottom: 10px; }
.ptable {
  display: grid;
  grid-template-columns: 22px repeat(18, minmax(52px, 1fr));
  grid-template-rows: 18px repeat(7, minmax(52px, auto)) 12px repeat(2, minmax(52px, auto));
  gap: 4px; min-width: 1000px;
}
.pt-axis { display: grid; place-items: center; font-size: 0.6rem; font-family: var(--mono); color: var(--ink-3); }

.pt-cell {
  position: relative; display: grid; align-content: center; gap: 0;
  padding: 4px 3px; cursor: pointer; overflow: hidden;
  border-radius: 7px; color: var(--ink); text-align: center;
  transition: transform 0.12s var(--ease), box-shadow 0.16s;
  /* Fallback first, for engines without color-mix() */
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(30,44,68,0.8), rgba(8,13,22,0.85));
}
@supports (color: color-mix(in srgb, red 50%, transparent)) {
  .pt-cell {
    border-color: color-mix(in srgb, var(--cat) 32%, transparent);
    background: linear-gradient(150deg, color-mix(in srgb, var(--cat) 15%, rgba(10,17,29,0.7)), rgba(8,13,22,0.85));
  }
  .pt-sym { color: color-mix(in srgb, var(--cat) 70%, #ffffff); }
  .el-hero { border-color: color-mix(in srgb, var(--cat) 35%, transparent); background: linear-gradient(140deg, color-mix(in srgb, var(--cat) 16%, transparent), transparent 70%); }
  .el-hero-tile { border-color: color-mix(in srgb, var(--cat) 45%, transparent); }
}
.pt-cell:hover {
  transform: translateY(-2px) scale(1.05); z-index: 3;
  border-color: var(--cat);
  box-shadow: 0 10px 22px -10px #000, 0 0 0 1px var(--cat), 0 0 18px -4px var(--cat);
}
.pt-cell.dim { opacity: 0.24; }
.pt-cell.seen::after {
  content: ''; position: absolute; top: 3px; right: 3px;
  width: 4px; height: 4px; border-radius: 50%; background: var(--cyan);
}
.pt-num { font-size: 0.54rem; font-family: var(--mono); color: var(--ink-3); line-height: 1.1; }
.pt-sym { font-size: 1.02rem; font-weight: 700; line-height: 1.15; color: var(--cyan); }
.pt-name { font-size: 0.52rem; color: var(--ink-2); line-height: 1.15; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pt-mass { font-size: 0.5rem; font-family: var(--mono); color: var(--ink-3); line-height: 1.1; }

.pt-fblock-label {
  display: grid; align-items: center; justify-content: end;
  font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-3);
  padding-right: 8px;
}
.ptable-foot { margin-top: 8px; }

.el-hero {
  display: flex; gap: 16px; align-items: center; flex-wrap: wrap;
  padding: 14px; border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: linear-gradient(140deg, rgba(120,170,220,0.1), transparent 70%);
}
.el-hero-tile {
  display: grid; place-items: center; width: 96px; height: 96px; flex-shrink: 0;
  border-radius: 14px; border: 1px solid var(--line-strong);
  background: rgba(6,11,20,0.6);
}
.el-hero-num { font-size: 0.66rem; font-family: var(--mono); color: var(--ink-3); }
.el-hero-sym { font-size: 2.2rem; font-weight: 800; line-height: 1; color: var(--cat); }
.el-hero-mass { font-size: 0.62rem; font-family: var(--mono); color: var(--ink-3); }
.el-hero-facts { display: grid; gap: 4px; flex: 1; min-width: 200px; }
.el-fact-row { display: flex; justify-content: space-between; gap: 12px; padding: 3px 0; border-bottom: 1px dashed var(--line); }
.el-fact-row:last-child { border-bottom: 0; }

.el-fact {
  display: flex; gap: 10px; margin-top: 16px; padding: 12px;
  border-radius: var(--radius-sm); border: 1px solid rgba(255,179,64,0.3); background: rgba(255,179,64,0.07);
}
.el-fact-icon { font-size: 1.05rem; }
.el-fact p { margin: 3px 0 0; color: var(--ink-2); }

/* ------------------------------------------------------------------ journal */

.journal-top {
  display: grid; grid-template-columns: minmax(230px, 0.7fr) minmax(260px, 1fr) minmax(240px, 1fr);
  gap: 14px; margin-bottom: 18px;
}
.progress-card { display: grid; gap: 14px; place-items: center; text-align: center; }
.progress-meta { width: 100%; }
.progress-row { display: flex; align-items: baseline; gap: 7px; justify-content: center; font-size: 0.85rem; }
.progress-row b { font-size: 1.3rem; color: var(--cyan); }

.badge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(74px, 1fr)); gap: 7px; margin-top: 10px; }
.badge {
  display: grid; gap: 3px; place-items: center; text-align: center;
  padding: 8px 5px; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: rgba(10,17,29,0.4); opacity: 0.45;
}
.badge.got {
  opacity: 1; border-color: rgba(255,179,64,0.4);
  background: linear-gradient(150deg, rgba(255,179,64,0.14), rgba(10,17,29,0.5));
}
.badge-icon { font-size: 1.18rem; line-height: 1.1; }
.badge-name { font-size: 0.57rem; line-height: 1.2; color: var(--ink-2); }

.journal-controls { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 14px; }

.journal-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.jcard {
  display: flex; gap: 10px; text-align: left; cursor: pointer; padding: 12px;
  border-radius: var(--radius); border: 1px solid var(--line);
  background: var(--panel); transition: all 0.15s var(--ease);
}
.jcard:hover { transform: translateY(-2px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.jcard.sim { border-color: rgba(139,123,255,0.35); }
.jcard-swatch { width: 12px; border-radius: 4px; flex-shrink: 0; box-shadow: 0 0 0 1px rgba(255,255,255,0.16) inset, 0 0 14px -3px currentColor; }
.jcard-body { display: grid; gap: 3px; min-width: 0; }
.jcard-name { font-size: 0.86rem; font-weight: 650; }
.jcard-formula { font-size: 0.74rem; color: var(--ink-3); }
.jcard-tags { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 3px; }

.disc-hero { display: flex; gap: 14px; align-items: center; margin-bottom: 14px; }
.disc-swatch { width: 62px; height: 62px; border-radius: 14px; box-shadow: 0 0 0 1px rgba(255,255,255,0.18) inset, 0 0 26px -6px currentColor; }
.disc-formula { font-size: 1.3rem; font-weight: 700; margin-bottom: 5px; }

.danger-zone {
  display: flex; gap: 14px; align-items: center; justify-content: space-between;
  flex-wrap: wrap; margin-top: 26px; border-color: rgba(255,93,122,0.25);
}
.danger-zone p { margin: 3px 0 0; max-width: 60ch; }

/* -------------------------------------------------------------------- learn */

.lesson-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.lesson-card {
  display: grid; gap: 8px; padding: 16px; text-decoration: none; color: inherit;
  border-radius: var(--radius); border: 1px solid var(--line);
  background: var(--panel); transition: all 0.16s var(--ease);
}
.lesson-card:hover { transform: translateY(-3px); border-color: rgba(53,224,216,0.4); box-shadow: var(--shadow-glow); }
.lesson-card.done { border-color: rgba(158,240,26,0.3); }
.lesson-card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.lesson-icon {
  font-size: 1.3rem; width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 11px; background: rgba(6,11,20,0.55); border: 1px solid var(--line-strong);
}
.lesson-title { font-size: 1.02rem; }
.lesson-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 4px; flex-wrap: wrap; }
.lesson-steps-dots { display: flex; gap: 9px; }
.sdot { display: inline-flex; align-items: center; gap: 4px; color: var(--ink-3); font-size: 0.66rem; }
.sdot i { width: 7px; height: 7px; border-radius: 50%; background: rgba(126,168,214,0.3); display: block; }
.sdot.on { color: var(--cyan); }
.sdot.on i { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }

.lesson-reader-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.reader { max-width: 820px; margin: 0 auto; display: grid; gap: 14px; }
.reader-head { display: flex; gap: 14px; align-items: flex-start; }
.reader-icon {
  font-size: 1.7rem; width: 54px; height: 54px; flex-shrink: 0; display: grid; place-items: center;
  border-radius: 14px; background: rgba(53,224,216,0.1); border: 1px solid rgba(53,224,216,0.3);
}
.reader-head h1 { font-size: clamp(1.35rem, 3vw, 1.8rem); }
.reader-step { position: relative; }
.reader-step-num {
  position: absolute; top: 14px; right: 16px;
  font-family: var(--mono); font-size: 0.66rem; color: var(--ink-3);
}
.reader-step-title { font-size: 1.08rem; margin-bottom: 9px; padding-right: 60px; }
.reader-step p { color: var(--ink-2); }

.exp-block { border-color: rgba(53,224,216,0.34); background: linear-gradient(150deg, rgba(53,224,216,0.08), rgba(17,26,42,0.62)); }
.exp-block.done { border-color: rgba(158,240,26,0.34); background: linear-gradient(150deg, rgba(158,240,26,0.07), rgba(17,26,42,0.62)); }
.exp-reagents { display: flex; gap: 7px; flex-wrap: wrap; margin: 10px 0; }

.quiz-block { display: grid; gap: 12px; }
.quiz-q { padding: 12px 13px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: rgba(10,17,29,0.4); }
.quiz-q.correct { border-color: rgba(158,240,26,0.4); }
.quiz-q.wrong { border-color: rgba(255,93,122,0.4); }
.quiz-q-text { font-size: 0.92rem; margin-bottom: 9px; }
.quiz-opts { display: grid; gap: 6px; }
.quiz-opt {
  display: flex; gap: 9px; align-items: flex-start; cursor: pointer;
  padding: 8px 11px; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: rgba(6,11,20,0.4);
  font-size: 0.85rem; transition: all 0.14s var(--ease);
}
.quiz-opt:hover { border-color: var(--line-strong); background: rgba(24,38,60,0.6); }
.quiz-opt input { accent-color: var(--cyan); margin-top: 2px; }
.quiz-opt.is-answer { border-color: rgba(158,240,26,0.6); background: rgba(158,240,26,0.1); }
.quiz-opt.is-chosen:not(.is-answer) { border-color: rgba(255,93,122,0.55); background: rgba(255,93,122,0.08); }
.quiz-explain { margin-top: 9px; font-size: 0.82rem; color: var(--ink-2); padding-left: 2px; }
.quiz-score {
  padding: 13px; border-radius: var(--radius-sm);
  border: 1px solid rgba(53,224,216,0.35); background: rgba(53,224,216,0.08);
}
.quiz-score p { margin: 4px 0 0; }

.next-lesson {
  display: flex; gap: 14px; align-items: center; justify-content: space-between;
  max-width: 820px; margin: 18px auto 0; text-decoration: none; color: inherit;
  transition: all 0.16s var(--ease);
}
.next-lesson:hover { border-color: rgba(53,224,216,0.4); transform: translateY(-2px); }
.next-lesson p { margin: 3px 0 0; max-width: 52ch; }
.next-arrow { font-size: 1.3rem; color: var(--cyan); }

/* --------------------------------------------------------------- challenges */

.daily {
  display: flex; gap: 18px; align-items: center; justify-content: space-between;
  flex-wrap: wrap; margin-bottom: 16px;
  border-color: rgba(139,123,255,0.35);
  background: linear-gradient(140deg, rgba(139,123,255,0.13), rgba(17,26,42,0.62) 60%);
}
.daily-body { flex: 1; min-width: 240px; display: grid; gap: 6px; }
.daily-body h2 { font-size: 1.15rem; }
.daily-xp { min-width: 200px; display: grid; gap: 3px; }

.challenge-rail { margin-bottom: 14px; }

.challenge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; align-items: start; }
.challenge-card {
  display: grid; gap: 10px; padding: 15px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel); backdrop-filter: blur(12px);
}
.challenge-card.done { border-color: rgba(158,240,26,0.32); background: linear-gradient(150deg, rgba(158,240,26,0.06), rgba(17,26,42,0.62)); }
.challenge-head { display: flex; gap: 11px; align-items: flex-start; }
.challenge-icon {
  font-size: 1.2rem; width: 38px; height: 38px; flex-shrink: 0; display: grid; place-items: center;
  border-radius: 11px; background: rgba(6,11,20,0.55); border: 1px solid var(--line-strong);
}
.challenge-title { font-size: 0.98rem; margin-bottom: 5px; }
.challenge-tick { color: var(--lime); font-size: 1.1rem; font-weight: 800; }
.challenge-brief { font-size: 0.86rem; color: var(--ink-2); margin: 0; }
.challenge-body { display: grid; gap: 9px; }

.challenge-hint-btn { justify-self: start; }
.challenge-hint {
  font-size: 0.8rem; color: var(--ink-2); padding: 9px 11px; border-radius: var(--radius-sm);
  border: 1px dashed var(--line-strong); background: rgba(255,179,64,0.06);
}
.challenge-hint b { color: var(--amber); }

.choice-opts { display: grid; gap: 6px; }
.choice-opt {
  text-align: left; cursor: pointer; padding: 9px 11px; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: rgba(6,11,20,0.4);
  color: var(--ink-2); font-size: 0.84rem; transition: all 0.14s var(--ease);
}
.choice-opt:hover:not(:disabled) { color: var(--ink); border-color: var(--line-strong); background: rgba(24,38,60,0.6); }
.choice-opt.picked { border-color: rgba(53,224,216,0.6); background: rgba(53,224,216,0.1); color: var(--ink); }
.choice-opt.is-answer { border-color: rgba(158,240,26,0.6); background: rgba(158,240,26,0.12); color: var(--ink); }
.choice-opt:disabled { cursor: default; }

.challenge-answer {
  padding: 10px 12px; border-radius: var(--radius-sm); font-size: 0.82rem; color: var(--ink-2);
  border: 1px solid var(--line); background: rgba(10,17,29,0.5);
}
.challenge-answer.correct { border-color: rgba(158,240,26,0.4); background: rgba(158,240,26,0.08); }
.challenge-answer.wrong { border-color: rgba(255,93,122,0.4); background: rgba(255,93,122,0.07); }
.challenge-answer b { color: var(--ink); }

.balance-row { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; padding: 11px; border-radius: var(--radius-sm); background: rgba(4,8,15,0.6); border: 1px solid var(--line); }
.balance-term { display: inline-flex; align-items: center; gap: 4px; }
.balance-input {
  width: 46px; padding: 5px 6px; text-align: center; font-family: var(--mono); font-size: 0.86rem;
  border-radius: 7px; border: 1px solid var(--line-strong); background: rgba(10,17,29,0.9); color: var(--cyan);
}
.balance-input:disabled { opacity: 0.7; }
.balance-formula { font-size: 0.95rem; }
.balance-plus, .balance-arrow { color: var(--ink-3); font-family: var(--mono); }
.balance-arrow { color: var(--cyan); }

/* ------------------------------------------------------------- encyclopedia */

.enc-controls { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.enc-controls .cat-rail { flex: 1; }

.type-card { margin-bottom: 16px; }
.type-card-head { display: flex; gap: 13px; align-items: center; margin-bottom: 10px; }
.type-icon {
  font-size: 1.5rem; width: 46px; height: 46px; flex-shrink: 0; display: grid; place-items: center;
  border-radius: 13px; background: rgba(6,11,20,0.55); border: 1px solid var(--line-strong);
}
.type-form { display: block; font-size: 0.78rem; color: var(--cyan); margin-top: 3px; }
.type-card p { color: var(--ink-2); }

.type-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.type-tile {
  display: grid; gap: 5px; text-align: left; cursor: pointer; padding: 14px;
  border-radius: var(--radius); border: 1px solid var(--line);
  background: var(--panel); color: inherit; align-content: start;
  transition: all 0.16s var(--ease);
}
.type-tile:hover { transform: translateY(-3px); border-color: rgba(53,224,216,0.4); box-shadow: var(--shadow-glow); }
.type-tile-icon { font-size: 1.35rem; }
.type-tile b { font-size: 0.94rem; }
.type-tile code { color: var(--cyan); }
.type-tile .chip { justify-self: start; margin-top: 4px; }

.rxn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 11px; }
.rxn-card {
  display: grid; gap: 8px; text-align: left; cursor: pointer; padding: 14px;
  border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel);
  color: inherit; transition: all 0.16s var(--ease); align-content: start;
}
.rxn-card:hover { transform: translateY(-2px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.rxn-card.found { border-color: rgba(158,240,26,0.28); }
.rxn-card-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.rxn-title { font-size: 0.96rem; }
.rxn-eq { font-size: 0.78rem; padding: 8px 10px; }

.topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 11px; }
.topic-card {
  display: flex; gap: 13px; align-items: flex-start; text-align: left; cursor: pointer; padding: 15px;
  border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel);
  color: inherit; transition: all 0.16s var(--ease);
}
.topic-card:hover { transform: translateY(-2px); border-color: rgba(53,224,216,0.4); box-shadow: var(--shadow-glow); }
.topic-icon {
  font-size: 1.35rem; width: 44px; height: 44px; flex-shrink: 0; display: grid; place-items: center;
  border-radius: 12px; background: rgba(6,11,20,0.55); border: 1px solid var(--line-strong);
}
.topic-title { font-size: 1rem; margin: 4px 0 4px; }
.topic-card p { margin: 0; }

/* --------------------------------------------------------------- responsive */

@media (max-width: 1100px) {
  .journal-top { grid-template-columns: 1fr 1fr; }
  .progress-card { grid-column: 1 / -1; grid-template-columns: auto 1fr; place-items: center start; text-align: left; }
  .progress-row { justify-content: flex-start; }
}
@media (max-width: 700px) {
  .journal-top { grid-template-columns: 1fr; }
  .progress-card { grid-template-columns: 1fr; place-items: center; text-align: center; }
  .progress-row { justify-content: center; }
  .kv { grid-template-columns: 1fr; }
  .kv dt { border-right: 1px solid var(--line); border-radius: var(--radius-sm) var(--radius-sm) 0 0 !important; }
  .kv dd { border-radius: 0 0 var(--radius-sm) var(--radius-sm) !important; margin-bottom: 6px; }
  .ptable { grid-template-columns: 18px repeat(18, minmax(44px, 1fr)); min-width: 860px; }
  .challenge-grid, .rxn-grid, .topic-grid, .type-grid { grid-template-columns: 1fr; }
  .reader-icon { width: 44px; height: 44px; font-size: 1.4rem; }
  .el-hero { gap: 12px; }
  .el-hero-tile { width: 78px; height: 78px; }
  .el-hero-sym { font-size: 1.8rem; }
}