/* ================= PLANT LIGHT LAB ================= */
:root{
  --bg:#07160f;
  --bg2:#0c2419;
  --panel:rgba(255,255,255,.055);
  --panel-2:rgba(255,255,255,.09);
  --stroke:rgba(255,255,255,.12);
  --stroke-2:rgba(255,255,255,.22);
  --txt:#eaf7ef;
  --muted:#9dbcab;
  --green:#4ade80;
  --green-d:#16a34a;
  --amber:#fbbf24;
  --danger:#f87171;
  --r:18px;
  --shadow:0 18px 45px rgba(0,0,0,.45);
  --font:'Segoe UI',-apple-system,BlinkMacSystemFont,'Helvetica Neue',Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  font-family:var(--font);
  color:var(--txt);
  background:
    radial-gradient(1200px 700px at 15% -10%, #17402c 0%, transparent 60%),
    radial-gradient(1000px 600px at 100% 0%, #123a4d 0%, transparent 55%),
    linear-gradient(170deg,var(--bg) 0%,var(--bg2) 55%,#061410 100%);
  background-attachment:fixed;
  min-height:100%;
  overflow-x:hidden;
}
body::before{ /* greenhouse glass frame */
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.35;
  background:
    repeating-linear-gradient(90deg,transparent 0 118px,rgba(255,255,255,.045) 118px 120px),
    repeating-linear-gradient(0deg,transparent 0 118px,rgba(255,255,255,.03) 118px 120px);
}
button,select,input{font-family:inherit}

/* ---------- screens ---------- */
.screen{display:none;position:relative;z-index:1}
.screen.active{display:block}

/* ---------- HOME ---------- */
.home{min-height:100dvh;padding:32px 20px;text-align:center;overflow:hidden}
.home.active{display:flex;align-items:center;justify-content:center}
.home-glow{
  position:absolute;width:900px;height:900px;left:50%;top:-30%;transform:translateX(-50%);
  background:radial-gradient(circle,rgba(74,222,128,.22),rgba(74,222,128,0) 62%);
  filter:blur(10px);animation:pulseGlow 7s ease-in-out infinite;pointer-events:none;
}
@keyframes pulseGlow{0%,100%{opacity:.7;transform:translateX(-50%) scale(1)}50%{opacity:1;transform:translateX(-50%) scale(1.08)}}
.home-inner{position:relative;max-width:760px;animation:riseIn .8s cubic-bezier(.2,.8,.2,1)}
@keyframes riseIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
.home-emoji{font-size:clamp(50px,11vw,86px);filter:drop-shadow(0 10px 26px rgba(74,222,128,.5));animation:floaty 4.5s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.home-title{
  font-size:clamp(38px,9vw,78px);letter-spacing:.06em;font-weight:800;margin:8px 0 14px;line-height:1;
  background:linear-gradient(100deg,#eafff2,#7ef0a9 40%,#ffe27a 75%,#eafff2);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 6px 22px rgba(0,0,0,.35));
}
.home-sub{color:var(--muted);font-size:clamp(15px,2.5vw,19px);line-height:1.65;margin-bottom:30px}
.btn-xl{font-size:19px;padding:18px 44px;border-radius:999px;letter-spacing:.06em}
.home-facts{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:38px 0 22px}
.fact{background:var(--panel);border:1px solid var(--stroke);border-radius:var(--r);padding:16px 18px;min-width:170px;backdrop-filter:blur(8px)}
.fact span{font-size:26px;display:block;margin-bottom:6px}
.fact b{display:block;font-size:15px}
.fact i{display:block;color:var(--muted);font-size:12.5px;font-style:normal;margin-top:3px}
.home-foot{color:rgba(157,188,171,.75);font-size:12.5px}

/* ---------- BUTTONS ---------- */
.btn{
  border:1px solid var(--stroke-2);background:var(--panel-2);color:var(--txt);
  padding:11px 16px;border-radius:14px;font-size:14px;font-weight:650;cursor:pointer;
  display:inline-flex;align-items:center;gap:7px;transition:transform .15s,background .2s,box-shadow .2s,border-color .2s;
  backdrop-filter:blur(8px);
}
.btn:hover{transform:translateY(-2px);background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.35)}
.btn:active{transform:translateY(0) scale(.97)}
.btn-primary{background:linear-gradient(135deg,#22c55e,#0ea5a0);border-color:transparent;box-shadow:0 12px 30px rgba(34,197,94,.35);font-weight:800}
.btn-primary:hover{background:linear-gradient(135deg,#34d977,#12bab2);box-shadow:0 16px 38px rgba(34,197,94,.5)}
.btn-play{background:linear-gradient(135deg,#22c55e,#16a34a);border-color:transparent;box-shadow:0 8px 20px rgba(34,197,94,.3);font-weight:800}
.btn-play.running{background:linear-gradient(135deg,#f59e0b,#f97316);box-shadow:0 8px 20px rgba(245,158,11,.35)}
.btn-lab{background:linear-gradient(135deg,#8b5cf6,#d946ef);border-color:transparent;box-shadow:0 8px 20px rgba(168,85,247,.35);font-weight:800}
.btn-ghost{background:var(--panel)}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}

/* ---------- TOPBAR ---------- */
.topbar{
  position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:12px 18px;background:rgba(6,20,14,.72);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--stroke);
}
.brand{font-weight:800;letter-spacing:.05em;font-size:16px;cursor:pointer;white-space:nowrap}
.brand span{background:linear-gradient(90deg,#eafff2,#7ef0a9);-webkit-background-clip:text;background-clip:text;color:transparent}
.day-chip{display:flex;align-items:baseline;gap:6px;background:var(--panel);border:1px solid var(--stroke);padding:6px 14px;border-radius:999px}
.day-chip small{font-size:10px;letter-spacing:.16em;color:var(--muted)}
.day-chip strong{font-size:20px;color:var(--green)}
.day-chip em{font-style:normal;font-size:12px;color:var(--muted)}
.topbar-actions{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap}
.progress-track{height:4px;background:rgba(255,255,255,.07);position:sticky;top:0;z-index:29}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,#22c55e,#facc15);transition:width .25s linear;box-shadow:0 0 12px rgba(250,204,21,.6)}

/* ---------- LAYOUT ---------- */
.greenhouse{max-width:1360px;margin:0 auto;padding:22px 18px 60px}
.pots{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.panel-row{display:grid;grid-template-columns:1.55fr 1fr;gap:18px;margin-top:20px}

/* ---------- CARDS ---------- */
.card{background:var(--panel);border:1px solid var(--stroke);border-radius:var(--r);padding:18px;backdrop-filter:blur(10px);box-shadow:var(--shadow)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.card-head h2{font-size:14.5px;letter-spacing:.07em;text-transform:uppercase;color:#cfeeda}

/* ---------- POT CARD ---------- */
.pot{
  position:relative;border-radius:22px;padding:0 0 16px;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.03));
  border:1px solid var(--stroke);box-shadow:var(--shadow);
  transition:box-shadow .4s,border-color .4s;
}
.pot-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px 8px}
.pot-title{font-size:12px;letter-spacing:.18em;color:var(--muted);font-weight:700}
.pot-emoji{font-size:22px}

/* stage / light beam */
.stage{position:relative;height:290px;overflow:hidden;margin:0 10px;border-radius:16px;
  background:linear-gradient(180deg,rgba(6,26,18,.85),rgba(10,40,28,.5) 60%,rgba(12,52,34,.35));
  border:1px solid rgba(255,255,255,.07);
}
.beam{
  position:absolute;left:50%;top:-6%;width:118%;height:78%;transform:translateX(-50%);
  clip-path:polygon(31% 0,69% 0,100% 100%,0 100%);
  background:linear-gradient(180deg,var(--lightC) 0%,transparent 92%);
  opacity:0;transition:opacity .5s,background .5s;pointer-events:none;mix-blend-mode:screen;
}
.beam::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(97deg,rgba(255,255,255,.16) 0 3px,transparent 3px 26px);
  animation:beamShift 5s linear infinite;opacity:.5;
}
@keyframes beamShift{from{transform:translateX(0)}to{transform:translateX(26px)}}
.lamp{
  position:absolute;left:50%;top:6px;transform:translateX(-50%);width:78px;height:13px;border-radius:0 0 16px 16px;
  background:linear-gradient(180deg,#2b3b34,#16221d);border:1px solid rgba(255,255,255,.16);
  box-shadow:0 0 26px var(--lightC),0 0 60px var(--lightC);transition:box-shadow .5s;
}
.lamp::after{content:"";position:absolute;left:12%;right:12%;bottom:-4px;height:7px;border-radius:50%;
  background:var(--lightC);filter:blur(4px);opacity:.95}
.floor-glow{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);width:74%;height:44px;border-radius:50%;
  background:radial-gradient(ellipse,var(--lightC),transparent 70%);opacity:0;filter:blur(9px);transition:opacity .5s,background .5s}
.plant-svg{position:absolute;inset:0;width:100%;height:100%;display:block}

/* ---------- CONTROLS ---------- */
.controls{padding:14px 16px 0;display:grid;gap:11px}
.ctrl label{display:block;font-size:10.5px;letter-spacing:.16em;color:var(--muted);margin-bottom:5px;font-weight:700}
.select-wrap{position:relative}
.select-wrap::after{content:"▾";position:absolute;right:13px;top:50%;transform:translateY(-50%);pointer-events:none;color:var(--muted);font-size:13px}
select{
  width:100%;appearance:none;background:rgba(0,0,0,.35);color:var(--txt);border:1px solid var(--stroke-2);
  border-radius:12px;padding:10px 34px 10px 13px;font-size:14px;font-weight:650;cursor:pointer;transition:border-color .2s,box-shadow .2s;
}
select:hover,select:focus{outline:none;border-color:var(--lightC);box-shadow:0 0 0 3px color-mix(in srgb,var(--lightC) 25%,transparent)}
select option{background:#0d2419;color:#eaf7ef}

.slider-row{display:flex;align-items:center;gap:11px}
input[type=range]{
  -webkit-appearance:none;appearance:none;flex:1;height:8px;border-radius:99px;background:linear-gradient(90deg,var(--lightC) var(--pct,60%),rgba(255,255,255,.14) var(--pct,60%));
  cursor:pointer;transition:background .15s;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:#fff;cursor:grab;
  border:3px solid var(--lightC);box-shadow:0 0 14px var(--lightC),0 3px 8px rgba(0,0,0,.5);transition:transform .15s;
}
input[type=range]::-webkit-slider-thumb:active{transform:scale(1.18);cursor:grabbing}
input[type=range]::-moz-range-thumb{width:19px;height:19px;border-radius:50%;background:#fff;border:3px solid var(--lightC);box-shadow:0 0 12px var(--lightC);cursor:grab}
.pct-badge{min-width:52px;text-align:center;font-weight:800;font-size:13.5px;background:rgba(0,0,0,.35);border:1px solid var(--stroke);border-radius:10px;padding:6px 4px;color:var(--lightC)}

/* ---------- STATS ---------- */
.stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:14px 16px 0}
.stat{background:rgba(0,0,0,.28);border:1px solid var(--stroke);border-radius:12px;padding:9px 11px}
.stat span{display:block;font-size:9.5px;letter-spacing:.14em;color:var(--muted);font-weight:700}
.stat b{display:block;font-size:17px;margin-top:3px;font-variant-numeric:tabular-nums}
.bar{height:5px;border-radius:99px;background:rgba(255,255,255,.13);margin-top:6px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:99px;transition:width .35s ease,background .35s}
.status-line{margin:12px 16px 0;font-size:12px;line-height:1.5;color:#cbe6d7;background:rgba(0,0,0,.24);border:1px solid var(--stroke);border-left:3px solid var(--lightC);border-radius:10px;padding:9px 11px;min-height:38px}
.dead .stage{filter:grayscale(.55) brightness(.75)}

/* ---------- LEGEND / GRAPH ---------- */
.legend{display:flex;gap:12px;flex-wrap:wrap}
.legend div{display:flex;align-items:center;gap:6px;font-size:11.5px;color:var(--muted)}
.legend i{width:13px;height:4px;border-radius:99px;display:block}
.canvas-wrap{width:100%;overflow:hidden;border-radius:12px;background:rgba(0,0,0,.24);border:1px solid var(--stroke)}
canvas{width:100%;height:auto;display:block}

/* ---------- CHALLENGES ---------- */
.challenges{list-style:none;display:grid;gap:9px}
.challenges li{display:flex;gap:11px;align-items:flex-start;background:rgba(0,0,0,.24);border:1px solid var(--stroke);border-radius:12px;padding:10px 12px;transition:border-color .3s,background .3s}
.challenges li.done{border-color:rgba(74,222,128,.6);background:rgba(34,197,94,.14)}
.ch-ico{font-size:17px;line-height:1.2}
.ch-txt b{display:block;font-size:13px;margin-bottom:2px}
.ch-txt small{color:var(--muted);font-size:11.5px;line-height:1.45;display:block}
.best-box{background:rgba(0,0,0,.24);border:1px solid var(--stroke);border-radius:12px;padding:11px 12px;font-size:12.5px;color:var(--muted);line-height:1.6}
.best-box b{color:var(--txt)}
.science-note{font-size:12.5px;line-height:1.65;color:var(--muted);background:rgba(0,0,0,.24);border:1px solid var(--stroke);border-radius:12px;padding:11px 12px}
.science-note b{color:#a7f3c4}

/* ---------- TOASTS ---------- */
.toast-wrap{position:fixed;right:16px;bottom:16px;z-index:80;display:flex;flex-direction:column;gap:10px;max-width:min(340px,calc(100vw - 32px));pointer-events:none}
.toast{
  pointer-events:auto;background:rgba(10,28,20,.94);border:1px solid var(--stroke-2);border-left:4px solid var(--tc,#4ade80);
  border-radius:14px;padding:13px 15px;box-shadow:var(--shadow);backdrop-filter:blur(14px);
  animation:toastIn .35s cubic-bezier(.2,.9,.3,1.3);
}
.toast.out{animation:toastOut .3s forwards}
@keyframes toastIn{from{opacity:0;transform:translateX(40px) scale(.94)}to{opacity:1;transform:none}}
@keyframes toastOut{to{opacity:0;transform:translateX(40px) scale(.94)}}
.toast b{display:block;font-size:13.5px;margin-bottom:4px;color:var(--tc,#4ade80)}
.toast p{font-size:12.5px;line-height:1.55;color:#d7ece1}
.toast.trophy{border-left-color:#fbbf24;background:linear-gradient(135deg,rgba(120,80,10,.95),rgba(10,28,20,.95))}

/* ---------- MODAL ---------- */
.modal-backdrop{position:fixed;inset:0;background:rgba(3,10,7,.82);backdrop-filter:blur(7px);z-index:90;display:none;align-items:center;justify-content:center;padding:20px;overflow-y:auto}
.modal-backdrop.open{display:flex}
.modal{
  position:relative;width:min(920px,100%);max-height:88dvh;overflow-y:auto;border-radius:24px;padding:28px;
  background:linear-gradient(160deg,#0f2c1f,#0a1d16 60%,#0d2434);border:1px solid var(--stroke-2);box-shadow:0 30px 80px rgba(0,0,0,.7);
  animation:modalIn .4s cubic-bezier(.2,.85,.25,1.1);
}
@keyframes modalIn{from{opacity:0;transform:translateY(26px) scale(.96)}to{opacity:1;transform:none}}
.modal-x{position:absolute;top:14px;right:14px;background:rgba(255,255,255,.1);border:1px solid var(--stroke);color:var(--txt);width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:14px;transition:background .2s}
.modal-x:hover{background:rgba(255,255,255,.22)}
.modal h2{font-size:clamp(22px,4vw,30px);margin-bottom:6px}
.modal .sub{color:var(--muted);font-size:14px;margin-bottom:20px}
.modal h3{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:#a7f3c4;margin:22px 0 10px}
.res-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:12px}
.res-card{background:rgba(0,0,0,.3);border:1px solid var(--stroke);border-radius:16px;padding:14px;border-top:4px solid var(--lightC)}
.res-card h4{font-size:15px;margin-bottom:9px;display:flex;align-items:center;gap:7px}
.res-row{display:flex;justify-content:space-between;font-size:12.5px;padding:4px 0;border-bottom:1px dashed rgba(255,255,255,.09)}
.res-row:last-child{border:none}
.res-row span{color:var(--muted)}
.res-row b{font-variant-numeric:tabular-nums}
.rank{display:grid;gap:9px}
.rank-item{display:flex;align-items:center;gap:12px;background:rgba(0,0,0,.3);border:1px solid var(--stroke);border-radius:14px;padding:12px 14px}
.rank-item .medal{font-size:22px}
.rank-item .who{font-weight:750;font-size:14px}
.rank-item .val{margin-left:auto;font-weight:800;color:var(--green);font-variant-numeric:tabular-nums}
.learn{display:grid;gap:9px}
.learn li{list-style:none;background:rgba(0,0,0,.28);border:1px solid var(--stroke);border-left:3px solid #4ade80;border-radius:12px;padding:11px 13px;font-size:13px;line-height:1.6;color:#d7ece1}
.learn li b{color:#a7f3c4}
.modal-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.exp-setup{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.exp-pot{background:rgba(0,0,0,.3);border:1px solid var(--stroke);border-radius:16px;padding:14px;display:grid;gap:10px}
.exp-pot h4{font-size:13px;letter-spacing:.1em;color:var(--muted)}

/* ---------- RESPONSIVE ---------- */
@media (max-width:1080px){
  .pots{grid-template-columns:1fr}
  .panel-row{grid-template-columns:1fr}
  .stage{height:320px}
}
@media (max-width:620px){
  .topbar{padding:10px 12px;gap:10px}
  .brand span{display:none}
  .topbar-actions{width:100%;margin-left:0;justify-content:space-between}
  .btn{padding:10px 12px;font-size:12.5px;flex:1;justify-content:center}
  .btn span{display:none}
  .btn-play span,.btn-lab span{display:inline}
  .greenhouse{padding:14px 12px 44px}
  .stage{height:265px}
  .modal{padding:20px 16px}
  .toast-wrap{left:12px;right:12px;bottom:12px;max-width:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.05ms!important}
}

/* ---------- PLANT SVG ---------- */
.leaf-inner{animation:leafPop .65s cubic-bezier(.2,.9,.3,1.4) both;transform-box:fill-box;transform-origin:0 50%}
@keyframes leafPop{from{opacity:0;transform:scale(.05)}60%{opacity:1;transform:scale(1.12)}to{opacity:1;transform:scale(1)}}
.crown-inner{animation:crownPop .8s cubic-bezier(.2,.9,.3,1.35) both;transform-box:fill-box;transform-origin:50% 50%}
@keyframes crownPop{from{opacity:0;transform:scale(.05) rotate(-25deg)}to{opacity:1;transform:scale(1) rotate(0)}}
.stem{transition:stroke .6s}
.sparkle{animation:sparkFloat 3s ease-in-out infinite}
@keyframes sparkFloat{0%,100%{opacity:.15;transform:translateY(0)}50%{opacity:.7;transform:translateY(-9px)}}