[hidden]{display:none!important}
:root{
  color-scheme: light;
  --ink:#102a2c;
  --muted:#607579;
  --paper:#f7fbfa;
  --surface:#ffffff;
  --line:#d9e7e4;
  --teal:#0f766e;
  --teal-dark:#0b5f59;
  --teal-soft:#e4f4f1;
  --blue:#325a94;
  --green:#3b7f49;
  --amber:#a36317;
  --rose:#a33f5a;
  --danger:#a53737;
  --shadow:0 18px 50px rgba(15,63,61,.10);
  font-family: Tahoma, Arial, "Noto Sans Arabic", sans-serif;
}
*{box-sizing:border-box}
html{background:#eef6f4}
body{margin:0;color:var(--ink);background:
  radial-gradient(circle at 10% 10%,rgba(15,118,110,.08),transparent 28rem),
  radial-gradient(circle at 92% 3%,rgba(50,90,148,.07),transparent 24rem),
  #eef6f4;min-height:100vh}
button{font:inherit}
button:focus-visible{outline:3px solid #ffb100;outline-offset:3px}
.app-shell{width:min(1180px,100%);margin-inline:auto;padding:clamp(14px,2.3vw,30px)}
.eyebrow{margin:0 0 6px;color:var(--teal);font-weight:800;letter-spacing:.02em}
.start-screen{display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,.9fr);align-items:center;gap:clamp(26px,5vw,64px);min-height:76vh;padding:clamp(18px,4vw,52px)}
.hero-copy h1{font-size:clamp(2.5rem,7vw,5.7rem);line-height:.98;margin:8px 0 18px;letter-spacing:-.04em}
.hero-subtitle{font-size:clamp(1.05rem,2vw,1.35rem);line-height:1.85;color:var(--muted);max-width:690px;margin:0 0 24px}
.howto{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 28px}
.howto-step{display:inline-flex;align-items:center;gap:8px;padding:9px 12px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.72);font-size:.92rem}
.howto-step b{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--teal);color:white}
.primary-btn,.secondary-btn,.ghost-btn{min-height:48px;border-radius:14px;border:1px solid transparent;padding:10px 18px;font-weight:800;cursor:pointer;transition:transform .16s ease,background .16s ease,border-color .16s ease}
.primary-btn{background:var(--teal);color:#fff;box-shadow:0 10px 22px rgba(15,118,110,.18)}
.primary-btn:hover{background:var(--teal-dark)}
.primary-btn:active,.secondary-btn:active,.ghost-btn:active{transform:translateY(1px)}
.secondary-btn{background:#fff;border-color:var(--line);color:var(--ink)}
.ghost-btn{background:transparent;border-color:var(--line);color:var(--ink)}
.compact{min-height:44px;padding-inline:16px}
.hero-visual{position:relative;min-height:520px;isolation:isolate}
.scope-ring{position:absolute;inset:8% 3% 4% 9%;border:18px solid rgba(13,62,63,.09);border-radius:50%;box-shadow:inset 0 0 0 2px rgba(15,118,110,.18);z-index:-1}
.specimen{position:absolute;width:min(82%,430px);aspect-ratio:1.35/1;border:1px solid rgba(20,74,73,.12);border-radius:30px;background:rgba(255,255,255,.9);box-shadow:var(--shadow);overflow:hidden}
.specimen img{width:100%;height:100%;object-fit:cover}
.specimen-animal{top:2%;right:0;transform:rotate(3deg)}
.specimen-plant{bottom:0;left:0;transform:rotate(-4deg)}
.game-screen{padding:clamp(8px,2vw,18px)}
.game-topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:14px}
.station-meta h2{font-size:clamp(1.5rem,3.5vw,2.6rem);margin:3px 0 0}
.top-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.score-chip{display:flex;align-items:baseline;gap:8px;padding:9px 13px;background:#fff;border:1px solid var(--line);border-radius:14px}
.score-chip span{font-size:.85rem;color:var(--muted)}
.score-chip strong{font-size:1.25rem;color:var(--teal)}
.progress-wrap{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;margin-bottom:14px}
.progress-track{height:10px;border-radius:99px;background:#dce9e7;overflow:hidden}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,var(--teal),#48a999);border-radius:inherit;transition:width .25s ease}
.progress-text{font-size:.9rem;color:var(--muted);white-space:nowrap}
.stage{background:rgba(255,255,255,.84);border:1px solid rgba(189,213,208,.8);border-radius:28px;padding:clamp(16px,2.5vw,28px);box-shadow:var(--shadow);min-height:540px;overflow:hidden;position:relative}
.mission-head{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:18px}
.mission-head h3{margin:0;font-size:clamp(1.25rem,2.4vw,1.75rem)}
.mission-head p{margin:6px 0 0;color:var(--muted);line-height:1.7}
.mission-badge{white-space:nowrap;background:var(--teal-soft);color:var(--teal-dark);border-radius:999px;padding:8px 12px;font-weight:800;font-size:.84rem}
.label-workspace{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(250px,.75fr);gap:20px;align-items:start}
.diagram-card{border-radius:24px;background:linear-gradient(180deg,#f9fcfb,#edf7f4);border:1px solid var(--line);overflow:hidden;min-width:0}
.diagram-card img{display:block;width:100%;height:auto;aspect-ratio:1.35/1;object-fit:contain}
.slot-panel{display:grid;gap:10px;align-content:start}
.slot-panel h4,.tray-title{margin:0 0 4px;font-size:.92rem;color:var(--muted)}
.drop-target{width:100%;min-height:56px;border:2px dashed #9bbab5;border-radius:16px;background:#fff;color:var(--ink);padding:9px 11px;text-align:right;cursor:pointer;display:flex;align-items:center;gap:10px;transition:.16s ease}
.drop-target:hover{border-color:var(--teal)}
.drop-target.is-selected-target{border-color:var(--teal);background:var(--teal-soft)}
.drop-target.filled{border-style:solid;border-color:#68a79f;background:#eff9f7;cursor:default}
.drop-target.wrong{animation:shake .28s ease;border-color:var(--danger)}
.target-number{display:grid;place-items:center;flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#163e42;color:#fff;font-weight:900}
.target-copy{display:flex;flex-direction:column;min-width:0}
.target-copy small{color:var(--muted);font-size:.72rem;margin-bottom:2px}
.target-copy strong{font-size:.95rem;line-height:1.4}
.tray{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.card-tray{display:flex;flex-wrap:wrap;gap:10px;align-items:stretch}
.drag-card{min-height:48px;border:1px solid #bed5d1;border-radius:14px;background:#fff;color:var(--ink);padding:10px 14px;font-weight:800;cursor:grab;touch-action:none;user-select:none;max-width:100%;line-height:1.45;box-shadow:0 6px 14px rgba(27,75,75,.06);transition:.16s ease}
.drag-card:hover{border-color:var(--teal);transform:translateY(-1px)}
.drag-card.selected{outline:3px solid rgba(15,118,110,.25);border-color:var(--teal);background:var(--teal-soft)}
.drag-card.placed{opacity:.22;pointer-events:none;transform:none;text-decoration:line-through}
.drag-card.wrong{animation:shake .28s ease;border-color:var(--danger)}
.drag-float{position:fixed;z-index:9999;pointer-events:none;max-width:260px;box-shadow:0 16px 42px rgba(17,52,55,.22);transform:rotate(-2deg) scale(1.03);opacity:.96}
.sort-layout{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:8px}
.sort-bin{min-height:185px;align-items:flex-start;flex-direction:column;padding:14px;border-style:solid;border-width:1px}
.sort-bin .bin-title{display:flex;align-items:center;gap:8px;font-weight:900;font-size:1.02rem}
.sort-bin .bin-title::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--teal)}
.sort-bin[data-target-id="plant"] .bin-title::before{background:var(--green)}
.sort-bin[data-target-id="animal"] .bin-title::before{background:var(--blue)}
.bin-placed{display:flex;flex-wrap:wrap;gap:6px;width:100%;margin-top:10px}
.placed-pill{font-size:.8rem;line-height:1.4;padding:6px 8px;border-radius:10px;background:#f2f7f6;border:1px solid var(--line)}
.function-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.function-target{min-height:76px;align-items:flex-start}
.function-target .target-copy strong{font-size:1rem}
.function-target .target-copy small{font-size:.76rem}
.microscope-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.instrument-target{min-height:88px;align-items:flex-start}
.instrument-icon{font-size:1.45rem;line-height:1}
.formula-panel{margin-top:16px;display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;padding:14px;border-radius:18px;background:#f4f8f7;border:1px solid var(--line);font-weight:900}
.formula-panel .fraction{display:inline-flex;flex-direction:column;text-align:center;line-height:1.4}
.formula-panel .fraction span:first-child{border-bottom:2px solid #284a4e;padding-bottom:2px}
.feedback-panel{margin-top:14px;min-height:46px;display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:14px;background:#f5f8f8;color:var(--muted);border:1px solid transparent}
.feedback-panel.good{background:#eef8f4;border-color:#b9dfd4;color:#1b695e}
.feedback-panel.bad{background:#fff4f2;border-color:#ecc8c0;color:#8a3a2d}
.feedback-dot{width:10px;height:10px;border-radius:50%;background:currentColor;flex:0 0 auto}
.game-controls{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end;margin-top:14px}
.result-screen{min-height:72vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:#fff;border:1px solid var(--line);border-radius:30px;padding:clamp(24px,5vw,58px);box-shadow:var(--shadow);position:relative;overflow:hidden}
.result-screen h2{font-size:clamp(1.8rem,4vw,3rem);margin:6px 0 12px}
.result-orbit{position:absolute;width:420px;height:420px;border-radius:50%;border:1px solid rgba(15,118,110,.11);z-index:0}
.result-orbit span{position:absolute;width:18px;height:18px;border-radius:50%;background:rgba(15,118,110,.18)}
.result-orbit span:nth-child(1){top:12%;left:20%}.result-orbit span:nth-child(2){right:4%;top:46%}.result-orbit span:nth-child(3){left:12%;bottom:8%}
.result-screen>*:not(.result-orbit){position:relative;z-index:1}
.stars{display:flex;gap:8px;font-size:2.35rem;margin:4px 0 16px;color:#e0aa2f}
.result-stats{display:grid;grid-template-columns:repeat(3,minmax(120px,1fr));gap:10px;width:min(650px,100%);margin:4px 0 18px}
.result-stats>div{padding:14px;border-radius:16px;background:#f5f9f8;border:1px solid var(--line)}
.result-stats span{display:block;font-size:.78rem;color:var(--muted);margin-bottom:4px}
.result-stats strong{font-size:1.35rem;color:var(--teal)}
.result-message{max-width:620px;color:var(--muted);line-height:1.8;margin:0 0 20px}
.class-mode .stage{padding:clamp(22px,3vw,36px)}
.class-mode .mission-head p,.class-mode .tray-title,.class-mode .target-copy small{display:none}
.class-mode .mission-head h3{font-size:clamp(1.65rem,3vw,2.25rem)}
.class-mode .drag-card,.class-mode .drop-target{font-size:1.12rem;min-height:58px}
.class-mode .diagram-card{background:#fff}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@keyframes shake{0%,100%{transform:translateX(0)}30%{transform:translateX(5px)}70%{transform:translateX(-5px)}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}
@media (max-width:820px){
  .start-screen{grid-template-columns:1fr;min-height:auto;padding:18px 4px 32px}.hero-visual{min-height:390px;order:-1}.specimen{width:min(74%,360px)}
  .label-workspace{grid-template-columns:1fr}.slot-panel{grid-template-columns:repeat(2,minmax(0,1fr))}.slot-panel h4{grid-column:1/-1}
  .sort-layout{grid-template-columns:1fr}.sort-bin{min-height:120px}
}
@media (max-width:560px){
  .app-shell{padding:10px}.hero-visual{min-height:330px}.scope-ring{inset:8% 1% 2% 6%;border-width:12px}.specimen{border-radius:20px}.hero-copy h1{font-size:2.75rem}
  .game-topbar{flex-direction:column}.top-actions{justify-content:flex-start;width:100%}.score-chip{margin-inline-start:auto}
  .stage{border-radius:20px;padding:14px;min-height:480px}.mission-head{flex-direction:column}.mission-badge{align-self:flex-start}
  .slot-panel{grid-template-columns:1fr}.drop-target{min-height:52px}.card-tray{gap:8px}.drag-card{flex:1 1 calc(50% - 8px);min-width:132px;padding:10px}
  .function-grid,.microscope-strip{grid-template-columns:1fr}.sort-bin{min-height:104px}.result-stats{grid-template-columns:1fr}.game-controls{justify-content:stretch}.game-controls button{flex:1 1 140px}
}
@media (max-width:360px){.drag-card{flex-basis:100%}.hero-visual{min-height:295px}.hero-subtitle{font-size:1rem}.howto-step{font-size:.82rem}.top-actions{gap:6px}.ghost-btn{flex:1 1 auto}.score-chip{margin-inline-start:0}.progress-wrap{gap:7px}}