/* english.css (v4) — Summer English 10. Two-level tabs, interactive activities,
   instant feedback, guide modals. Extends shared.css (dark glassmorphic). */

:root {
  --eng-pink: #ec4899;
  --eng-purple: #a855f7;
  --eng-ink: #e8edf6;
  --eng-soft: #aab4c5;
  --eng-line: rgba(255, 255, 255, 0.09);
  --eng-panel: #141c30;
  --eng-panel2: #0f1626;
  --eng-ok: #22c55e;
  --eng-okbg: rgba(34, 197, 94, 0.14);
  --eng-no: #f43f5e;
  --eng-nobg: rgba(244, 63, 94, 0.14);
}

/* ---------- hero ---------- */
.eng-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 26px;
}
@media (min-width: 860px) {
  .eng-hero-grid {
    grid-template-columns: 1.5fr 1fr;
  }
}
.eng-ring-card {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 24px;
  background: var(--eng-panel);
  border: 1px solid var(--eng-line);
  border-radius: 22px;
  box-shadow: var(--shadow-md);
}
.eng-ring {
  position: relative;
  width: 132px;
  height: 132px;
  flex: 0 0 auto;
}
.eng-ring svg {
  transform: rotate(-90deg);
}
.eng-ring-track {
  stroke: rgba(255, 255, 255, 0.08);
}
.eng-ring-fill {
  stroke: url(#engGrad);
  stroke-linecap: round;
  transition: stroke-dashoffset 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.eng-ring-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.eng-ring-label b {
  font-family: var(--font-title);
  font-size: 2rem;
  color: #fff;
  line-height: 1;
}
.eng-ring-label span {
  font-size: 0.68rem;
  color: var(--eng-soft);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin-top: 3px;
}
.eng-ring-meta h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
}
.eng-ring-meta p {
  color: var(--eng-soft);
  font-size: 0.9rem;
  margin-bottom: 3px;
}
.eng-ring-meta .eng-xp {
  color: var(--gold);
  font-weight: 800;
}
.eng-badges {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-content: center;
}
.eng-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--eng-panel);
  border: 1px solid var(--eng-line);
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--eng-soft);
  opacity: 0.5;
  filter: grayscale(0.7);
  transition: all 0.3s ease;
}
.eng-badge.earned {
  opacity: 1;
  filter: none;
  color: #fff;
  border-color: var(--gold);
  box-shadow: 0 0 16px var(--gold-glow);
}
.eng-badge .ico {
  font-size: 1.15rem;
}

/* ---------- module intro ---------- */
.eng-module-intro {
  display: flex;
  gap: 18px;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(168, 85, 247, 0.14), transparent 55%),
    var(--eng-panel);
  border: 1px solid var(--eng-line);
  border-left: 4px solid var(--eng-purple);
  border-radius: 16px;
  padding: 20px 24px;
  margin-bottom: 18px;
}
.eng-m-ico {
  font-size: 2.4rem;
  line-height: 1;
}
.eng-module-intro h2 {
  font-size: 1.5rem;
  margin-bottom: 4px;
}
.eng-module-intro p {
  color: var(--eng-soft);
  font-size: 0.95rem;
  max-width: 75ch;
}

/* ---------- sub-tabs ---------- */
.eng-subtabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 6px;
  background: var(--eng-panel2);
  border: 1px solid var(--eng-line);
  border-radius: 14px;
  margin-bottom: 20px;
}
.eng-subtab {
  border: 1px solid transparent;
  background: transparent;
  color: var(--eng-soft);
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 9px 16px;
  min-height: 42px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
}
.eng-subtab:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}
.eng-subtab.active {
  background: var(--accent-gradient, var(--eng-purple));
  color: #fff;
  box-shadow: 0 6px 18px rgba(168, 85, 247, 0.3);
}

/* ---------- activity panel ---------- */
.eng-panel {
  background: var(--eng-panel);
  border: 1px solid var(--eng-line);
  border-radius: 18px;
  padding: 26px;
  box-shadow: var(--shadow-md);
  animation: eng-fade 0.25s ease;
}
@keyframes eng-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.eng-act-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--eng-line);
}
.eng-kicker {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--eng-purple);
  margin-bottom: 6px;
}
.eng-act-title {
  font-size: 1.55rem;
  line-height: 1.15;
}
.eng-act-sub {
  color: var(--eng-soft);
  font-size: 0.92rem;
  margin-top: 6px;
  max-width: 70ch;
}
.eng-guide-btn {
  border: 1px solid var(--eng-line);
  background: var(--eng-panel2);
  color: #fff;
  font-weight: 700;
  font-size: 0.82rem;
  padding: 9px 14px;
  min-height: 42px;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.18s ease;
}
.eng-guide-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}
.eng-done-banner {
  display: none;
  align-items: center;
  gap: 8px;
  background: var(--eng-okbg);
  color: var(--eng-ok);
  border: 1px solid rgba(34, 197, 94, 0.4);
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.eng-done-banner.show {
  display: flex;
}
.eng-inline-status {
  color: var(--eng-soft);
  font-size: 0.9rem;
  margin-bottom: 14px;
}
.eng-inline-status b {
  color: #fff;
}

/* ---------- reading layout ---------- */
.eng-read {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}
@media (min-width: 880px) {
  .eng-read {
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
  }
}
.eng-passage {
  background: var(--eng-panel2);
  border: 1px solid var(--eng-line);
  border-radius: 14px;
  padding: 24px 26px;
  font-size: 1.1rem;
  line-height: 1.9;
  color: #dfe6f2;
  max-height: 640px;
  overflow-y: auto;
}
@media (min-width: 880px) {
  .eng-passage {
    position: sticky;
    top: 84px;
  }
}
.eng-passage p {
  margin-bottom: 14px;
}
.eng-genre {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--eng-pink);
  margin-bottom: 14px;
}
.eng-passage mark {
  background: rgba(236, 72, 153, 0.2);
  color: #fff;
  border-radius: 4px;
  padding: 0 3px;
  border-bottom: 1px dotted var(--eng-pink);
  cursor: help;
}
.eng-quiz-head {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.eng-progresspill {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--eng-soft);
  background: var(--eng-panel2);
  border: 1px solid var(--eng-line);
  padding: 4px 12px;
  border-radius: 999px;
}
.eng-progresspill b {
  color: var(--eng-ok);
}

/* questions */
.eng-q {
  margin-bottom: 18px;
}
.eng-q-stem {
  font-weight: 600;
  font-size: 0.98rem;
  margin-bottom: 10px;
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.eng-q-num {
  flex: 0 0 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--eng-purple);
  color: #fff;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 0.82rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.eng-opts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.eng-opt {
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  background: var(--eng-panel2);
  border: 1.5px solid var(--eng-line);
  border-radius: 11px;
  padding: 12px 14px;
  font-size: 0.92rem;
  color: var(--eng-ink);
  cursor: pointer;
  transition: all 0.15s ease;
}
.eng-opt:hover:not(.locked) {
  border-color: var(--eng-purple);
  transform: translateX(3px);
}
.eng-key {
  flex: 0 0 26px;
  height: 26px;
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.08);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.82rem;
  color: var(--eng-soft);
}
.eng-opt.locked {
  cursor: default;
}
.eng-opt.correct {
  border-color: var(--eng-ok);
  background: var(--eng-okbg);
  color: #fff;
}
.eng-opt.correct .eng-key {
  background: var(--eng-ok);
  color: #06281a;
}
.eng-opt.wrong {
  border-color: var(--eng-no);
  background: var(--eng-nobg);
}
.eng-opt.wrong .eng-key {
  background: var(--eng-no);
  color: #2a0610;
}
.eng-rationale {
  display: none;
  margin-top: 8px;
  font-size: 0.86rem;
  line-height: 1.55;
  color: #cdd6e6;
  background: var(--eng-panel2);
  border-left: 3px solid var(--eng-purple);
  border-radius: 0 8px 8px 0;
  padding: 10px 12px;
}
.eng-rationale.show {
  display: block;
}

/* ---------- match-up ---------- */
.eng-match2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.eng-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.eng-mtile {
  text-align: left;
  background: var(--eng-panel2);
  border: 1.5px solid var(--eng-line);
  border-radius: 11px;
  padding: 13px 15px;
  color: var(--eng-ink);
  font-size: 0.9rem;
  cursor: pointer;
  min-height: 48px;
  transition: all 0.15s ease;
}
.eng-mtile:hover {
  border-color: var(--eng-purple);
}
.eng-mtile.sel {
  border-color: var(--eng-pink);
  background: rgba(236, 72, 153, 0.16);
  transform: scale(1.02);
}
.eng-mtile.matched {
  border-color: var(--eng-ok);
  background: var(--eng-okbg);
  color: var(--eng-ok);
  pointer-events: none;
  opacity: 0.7;
}
.eng-mtile.miss {
  border-color: var(--eng-no);
  background: var(--eng-nobg);
  animation: eng-shake 0.32s;
}
@keyframes eng-shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

/* ---------- fill / sort shared pill buttons ---------- */
.eng-fill,
.eng-sortcard {
  background: var(--eng-panel2);
  border: 1px solid var(--eng-line);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 12px;
}
.eng-fill-stem,
.eng-quote {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 12px;
}
.eng-quote {
  font-style: italic;
  color: #fff;
}
.eng-blank {
  color: var(--eng-pink);
  font-weight: 800;
  letter-spacing: 1px;
}
.eng-blank.filled {
  color: var(--eng-ok);
}
.eng-fill-opts,
.eng-bins {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.eng-pillbtn {
  border: 1.5px solid var(--eng-line);
  background: var(--eng-panel);
  color: var(--eng-ink);
  font-weight: 700;
  font-size: 0.86rem;
  padding: 9px 16px;
  min-height: 42px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.eng-pillbtn:hover:not(.locked) {
  border-color: var(--eng-purple);
}
.eng-pillbtn.locked {
  cursor: default;
}
.eng-pillbtn.correct {
  border-color: var(--eng-ok);
  background: var(--eng-okbg);
  color: var(--eng-ok);
}
.eng-pillbtn.wrong {
  border-color: var(--eng-no);
  background: var(--eng-nobg);
  color: var(--eng-no);
}

/* ---------- spot the error ---------- */
.eng-spot {
  background: var(--eng-panel2);
  border: 1px solid var(--eng-line);
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 12px;
}
.eng-spot-skill {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--eng-purple);
  margin-bottom: 8px;
}
.eng-spot-sentence,
.eng-sentence {
  font-size: 1.1rem;
  line-height: 2;
}
.eng-gword {
  cursor: pointer;
  padding: 2px 5px;
  border-radius: 6px;
  border-bottom: 2px solid transparent;
  transition: all 0.12s ease;
}
.eng-gword:hover {
  background: rgba(168, 85, 247, 0.18);
  border-bottom-color: var(--eng-purple);
}
.eng-gword.ok {
  background: var(--eng-okbg);
  border-bottom-color: var(--eng-ok);
  color: var(--eng-ok);
}
.eng-gword.no {
  background: var(--eng-nobg);
}
.eng-gword.reveal {
  background: rgba(168, 85, 247, 0.22);
}

/* ---------- flip cards ---------- */
.eng-flip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.eng-flip {
  border: none;
  background: none;
  padding: 0;
  height: 150px;
  perspective: 900px;
  cursor: pointer;
}
.eng-flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s;
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
}
.eng-flip.flipped .eng-flip-inner {
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
}
.eng-flip-front,
.eng-flip-back {
  position: absolute;
  inset: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border: 1px solid var(--eng-line);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}
.eng-flip-front {
  background: linear-gradient(
    135deg,
    rgba(168, 85, 247, 0.18),
    var(--eng-panel2)
  );
}
.eng-flip-back {
  background: var(--eng-panel2);
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
}
.eng-flip .eng-word {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
}
.eng-flip .eng-pos {
  font-size: 0.74rem;
  font-style: italic;
  color: var(--eng-pink);
  margin-top: 4px;
}
.eng-flip .eng-tap {
  font-size: 0.66rem;
  color: var(--eng-soft);
  margin-top: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.eng-flip .eng-def {
  font-size: 0.86rem;
  color: var(--eng-ink);
  line-height: 1.45;
}
.eng-flip .eng-sent {
  font-size: 0.76rem;
  font-style: italic;
  color: var(--eng-soft);
  margin-top: 8px;
}

/* ---------- compose / study ---------- */
.eng-scaffold {
  margin-bottom: 14px;
}
.eng-step-label {
  display: block;
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--eng-purple);
  margin-bottom: 6px;
}
.eng-checklist {
  list-style: none;
  margin: 6px 0;
  padding: 0;
}
.eng-checklist li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 7px;
  font-size: 0.9rem;
  color: #cdd6e6;
  line-height: 1.5;
}
.eng-checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--eng-purple);
  font-weight: 800;
}
.eng-textarea {
  width: 100%;
  min-height: 180px;
  background: var(--eng-panel2);
  border: 1px solid var(--eng-line);
  border-radius: 12px;
  padding: 14px;
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.98rem;
  line-height: 1.6;
  resize: vertical;
}
.eng-textarea:focus {
  outline: none;
  border-color: var(--eng-pink);
  box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.18);
}
.eng-wordcount {
  text-align: right;
  font-size: 0.8rem;
  color: var(--eng-soft);
  margin: 6px 0 12px;
}
.eng-wordcount b {
  color: #fff;
}
.eng-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.eng-study .eng-card2 {
  background: var(--eng-panel2);
  border: 1px solid var(--eng-line);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 14px;
}
.eng-card2 h3 {
  font-size: 1.1rem;
  color: var(--eng-pink);
  margin-bottom: 8px;
}
.eng-card2 p {
  font-size: 0.92rem;
  line-height: 1.6;
  color: #cdd6e6;
  margin-bottom: 8px;
}
.eng-card2 blockquote {
  border-left: 3px solid var(--eng-purple);
  padding: 4px 0 4px 14px;
  margin: 8px 0;
  font-style: italic;
  color: #fff;
  line-height: 1.6;
}
.eng-ex .x {
  color: var(--eng-no);
  font-weight: 800;
}
.eng-ex .c {
  color: var(--eng-ok);
  font-weight: 800;
}
.eng-rubric {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.eng-rubric th,
.eng-rubric td {
  border: 1px solid var(--eng-line);
  padding: 9px 11px;
  text-align: left;
  vertical-align: top;
}
.eng-rubric th {
  background: var(--eng-panel2);
  color: #fff;
  font-family: var(--font-title);
}
.eng-rubric td:first-child {
  color: var(--eng-pink);
  font-weight: 700;
  white-space: nowrap;
}

/* ---------- game launch tiles ---------- */
.eng-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}
.eng-tile-game {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  background: var(--eng-panel2);
  border: 1px solid var(--eng-line);
  border-top: 4px solid var(--tile, var(--eng-purple));
  border-radius: 16px;
  padding: 22px;
  transition: all 0.2s ease;
}
.eng-tile-game:hover {
  transform: translateY(-5px);
  border-color: var(--tile, var(--eng-purple));
  box-shadow:
    0 16px 36px rgba(0, 0, 0, 0.4),
    0 0 22px color-mix(in srgb, var(--tile) 25%, transparent);
}
.eng-tile-ico {
  font-size: 2.4rem;
}
.eng-tile-name {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
}
.eng-tile-desc {
  font-size: 0.86rem;
  color: var(--eng-soft);
  flex: 1;
}
.eng-tile-go {
  margin-top: 8px;
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--tile, var(--eng-purple));
}

/* ---------- overview ---------- */
.eng-overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.eng-ov-card {
  background: var(--eng-panel);
  border: 1px solid var(--eng-line);
  border-radius: 16px;
  padding: 22px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.eng-ov-card:hover {
  transform: translateY(-4px);
  border-color: var(--eng-purple);
  box-shadow: var(--shadow-lg);
}
.eng-ov-ico {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 10px;
}
.eng-ov-card h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
}
.eng-ov-card p {
  font-size: 0.86rem;
  color: var(--eng-soft);
  line-height: 1.5;
  margin-bottom: 10px;
}
.eng-ov-count {
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--eng-purple);
}
.eng-ov-arcade {
  background: linear-gradient(
    135deg,
    rgba(236, 72, 153, 0.16),
    var(--eng-panel)
  );
  border-color: rgba(236, 72, 153, 0.4);
}
.eng-ov-arcade .eng-ov-count {
  color: var(--eng-pink);
}

/* ---------- modal ---------- */
.eng-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 16, 0.78);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.eng-modal-backdrop.show {
  display: flex;
  animation: eng-fade 0.2s ease;
}
.eng-modal {
  position: relative;
  width: min(560px, 100%);
  max-height: 86vh;
  overflow-y: auto;
  background: var(--eng-panel);
  border: 1px solid var(--eng-line);
  border-radius: 20px;
  padding: 30px;
  box-shadow: var(--shadow-lg);
}
.eng-modal h2 {
  font-size: 1.45rem;
  margin-bottom: 14px;
  padding-right: 30px;
}
.eng-modal-body p {
  color: #cdd6e6;
  line-height: 1.6;
  margin-bottom: 10px;
}
.eng-modal-x {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 38px;
  height: 38px;
  border: none;
  background: var(--eng-panel2);
  color: #fff;
  border-radius: 10px;
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}
.eng-modal-x:hover {
  background: var(--eng-no);
}

/* focus + a11y */
.eng-section button:focus-visible,
.eng-section a:focus-visible,
.tab:focus-visible,
.eng-modal button:focus-visible,
.eng-tile-game:focus-visible {
  outline: 3px solid var(--eng-pink);
  outline-offset: 2px;
}

@media (max-width: 620px) {
  .eng-badges {
    grid-template-columns: 1fr;
  }
  .eng-match2 {
    grid-template-columns: 1fr;
  }
  .eng-panel {
    padding: 18px;
  }
}