:root{
  --bg-1:#0a0e1a;
  --bg-2:#141a2e;
  --glass-bg:rgba(255,255,255,0.045);
  --glass-border:rgba(255,255,255,0.09);
  --text-1:#f1f4ff;
  --text-2:#9aa5c9;
  --accent-1:#00e5ff;
  --accent-2:#a855f7;
  --accent-3:#ff5fa2;
  --accent-4:#ffd23f;
  --accent-5:#39ff8f;
  --danger:#ff5c7a;
  --warn:#ffb020;
  --ok:#39ff8f;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --font-scale:1;
}
[data-theme="light"]{
  --bg-1:#eef1fb; --bg-2:#ffffff; --glass-bg:rgba(20,20,40,0.04); --glass-border:rgba(20,20,40,0.10);
  --text-1:#1a1d2e; --text-2:#565b7a;
}
body{color:var(--text-1);background:radial-gradient(circle at 20% 0%,var(--bg-2),var(--bg-1) 60%);
  font-size:calc(1rem * var(--font-scale));}

.glass{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);
  backdrop-filter:blur(14px);box-shadow:0 8px 32px rgba(0,0,0,0.25);}

/* ===== Topbar ===== */
#topbar{background:rgba(10,14,26,0.55);backdrop-filter:blur(16px);border-bottom:1px solid var(--glass-border);}
.brand-name{background:linear-gradient(90deg,var(--accent-1),var(--accent-2),var(--accent-3));
  -webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800;}
.icon-btn{width:38px;height:38px;border-radius:50%;border:1px solid var(--glass-border);
  background:var(--glass-bg);color:var(--text-1);cursor:pointer;font-size:1rem;transition:.2s;}
.icon-btn:hover{transform:scale(1.1);border-color:var(--accent-1);}
.xp-pill{display:flex;flex-direction:column;align-items:center;padding:6px 16px;border-radius:20px;
  background:linear-gradient(135deg,rgba(0,229,255,0.18),rgba(168,85,247,0.18));
  border:1px solid var(--accent-1);font-weight:700;font-size:.75rem;line-height:1.3;}
#rank-value{color:var(--accent-1);font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;}

/* ===== Buttons ===== */
.btn{background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-1);
  padding:9px 16px;border-radius:12px;cursor:pointer;font-weight:600;font-size:.85rem;
  transition:transform .15s, box-shadow .15s, border-color .15s;}
.btn:hover{transform:translateY(-2px);border-color:var(--accent-1);box-shadow:0 4px 16px rgba(0,229,255,0.25);}
.btn-primary{background:linear-gradient(135deg,var(--accent-1),var(--accent-2));border:none;color:#04070f;
  box-shadow:0 4px 20px rgba(168,85,247,0.4);}
.btn-primary:hover{box-shadow:0 6px 26px rgba(168,85,247,0.55);}

/* ===== Home Screen ===== */
.home-hero{text-align:center;margin:10px auto 34px;max-width:760px;}
.home-hero h1{font-size:2.6rem;font-weight:800;margin-bottom:10px;
  background:linear-gradient(90deg,var(--accent-1),var(--accent-2),var(--accent-3));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  letter-spacing:-0.01em;}
.home-hero p{color:var(--text-2);font-size:1.05rem;}

.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:20px;}
.home-card{position:relative;display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:30px 14px;cursor:pointer;border:1px solid var(--glass-border);border-radius:var(--radius-lg);
  background:var(--glass-bg);backdrop-filter:blur(14px);overflow:hidden;
  transition:transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .25s, border-color .25s;}
.home-card::before{content:"";position:absolute;inset:0;opacity:0;
  background:linear-gradient(135deg,rgba(0,229,255,0.16),rgba(168,85,247,0.16));
  transition:opacity .25s;}
.home-card:hover{transform:translateY(-8px) scale(1.03);border-color:var(--accent-1);
  box-shadow:0 14px 34px rgba(0,229,255,0.22);}
.home-card:hover::before{opacity:1;}
.hc-icon{font-size:2.4rem;position:relative;z-index:1;filter:drop-shadow(0 4px 10px rgba(0,0,0,.4));}
.home-card span:last-child{position:relative;z-index:1;font-weight:700;font-size:.92rem;}

/* highlight the anatomy card as the recommended first step */
.home-card[data-nav="anatomy"]{border-color:var(--accent-4);
  background:linear-gradient(160deg,rgba(255,210,63,0.12),var(--glass-bg));}
.home-card[data-nav="anatomy"]::after{content:"START HERE";position:absolute;top:8px;right:8px;
  background:var(--accent-4);color:#221800;font-size:.55rem;font-weight:800;padding:2px 7px;
  border-radius:8px;letter-spacing:.03em;z-index:2;}

/* ===== Build Screen ===== */
.workspace-toolbar{border-radius:var(--radius-md);}
#device-title{font-weight:800;font-size:1.05rem;background:linear-gradient(90deg,var(--accent-1),var(--accent-3));
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.palette-panel h2, .diagnostics-panel h2{font-size:1rem;margin-bottom:12px;color:var(--accent-1);}
.palette-tab{background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-2);
  padding:6px 12px;border-radius:16px;font-size:.72rem;cursor:pointer;font-weight:600;transition:.2s;}
.palette-tab.active{background:linear-gradient(135deg,var(--accent-1),var(--accent-2));color:#04070f;border:none;}
.palette-item{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;
  border-radius:var(--radius-sm);background:var(--glass-bg);border:1px solid var(--glass-border);
  cursor:grab;transition:.2s;}
.palette-item:hover{border-color:var(--accent-1);transform:translateX(3px);}
.palette-item small{color:var(--text-2);display:block;font-size:.7rem;margin-top:2px;}
.palette-item span{font-size:1.1rem;color:var(--accent-5);}

.board-area{border-radius:var(--radius-lg);}
.slot{position:relative;border:2px dashed var(--glass-border);border-radius:var(--radius-md);
  padding:14px;min-height:88px;display:flex;flex-direction:column;justify-content:center;
  transition:.2s;background:rgba(255,255,255,0.015);}
.slot-label{font-size:.7rem;font-weight:700;color:var(--accent-1);text-transform:uppercase;letter-spacing:.03em;}
.slot-empty-text{color:var(--text-2);font-size:.78rem;margin-top:4px;}
.slot.drag-over{border-color:var(--accent-4);background:rgba(255,210,63,0.08);}
.slot.filled{border:2px solid var(--accent-5);background:rgba(57,255,143,0.06);}
.slot.error{border:2px solid var(--danger);background:rgba(255,92,122,0.08);animation:shake .4s;}
.slot-remove{position:absolute;top:6px;right:8px;background:none;border:none;color:var(--danger);
  cursor:pointer;font-size:.9rem;}
#slot-container.exploded .slot{transform:scale(1.05);box-shadow:0 0 0 3px rgba(0,229,255,0.25);}

.stat-strip .stat-chip{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:12px;
  padding:8px 14px;display:flex;flex-direction:column;min-width:100px;}
.stat-chip .label{font-size:.65rem;color:var(--text-2);text-transform:uppercase;}
.stat-chip .val{font-weight:800;font-size:1rem;}
.stat-chip.warn .val{color:var(--warn);}
.stat-chip.danger .val{color:var(--danger);}

/* ===== Screens general ===== */
.screen-title{font-size:1.6rem;font-weight:800;margin-bottom:4px;
  background:linear-gradient(90deg,var(--accent-1),var(--accent-2));-webkit-background-clip:text;
  background-clip:text;color:transparent;}
.screen-subtitle{color:var(--text-2);margin:-2px 0 20px;font-size:.95rem;}
.back-btn{margin-top:24px;}

.mission-card,.achievement-card,.progress-card,.glossary-card,.daily-card{
  background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-md);
  padding:18px;transition:.2s;}
.mission-card:hover,.glossary-card:hover{transform:translateY(-4px);border-color:var(--accent-1);}
.achievement-card.locked{opacity:.4;filter:grayscale(.6);}
.progress-card{text-align:center;}
.progress-card h3{font-size:.8rem;color:var(--text-2);margin-bottom:6px;}
.progress-card p{font-size:1.6rem;font-weight:800;color:var(--accent-1);margin:0;}

.text-input{width:100%;padding:10px 14px;border-radius:12px;border:1px solid var(--glass-border);
  background:var(--glass-bg);color:var(--text-1);margin-bottom:16px;font-size:.9rem;}

.settings-panel{padding:20px;display:flex;flex-direction:column;gap:14px;}
.setting-row{display:flex;justify-content:space-between;align-items:center;}

/* ===== Modal / Toast ===== */
.modal{position:relative;border-radius:var(--radius-lg);}
.modal-close-btn{position:absolute;top:14px;right:14px;width:32px;height:32px;padding:0;border-radius:8px;}
.toast{padding:12px 18px;border-radius:12px;background:var(--glass-bg);border:1px solid var(--glass-border);
  backdrop-filter:blur(10px);font-size:.85rem;font-weight:600;}
.toast.success{border-color:var(--ok);color:var(--ok);}
.toast.error{border-color:var(--danger);color:var(--danger);}
.toast.info{border-color:var(--accent-1);color:var(--accent-1);}

.badge{display:inline-block;background:rgba(0,229,255,0.14);border:1px solid var(--accent-1);
  color:var(--accent-1);padding:4px 10px;border-radius:14px;font-size:.72rem;font-weight:700;}

/* ===== AI mentor ===== */
.ai-mentor-btn{width:52px;height:52px;border-radius:50%;font-size:1.4rem;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--accent-2),var(--accent-3));box-shadow:0 6px 20px rgba(168,85,247,.5);}
.ai-mentor-panel{border-radius:var(--radius-md);}

/* ===== Device Match Report ===== */
.function-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;margin-top:12px;}
.function-card{background:rgba(255,255,255,0.04);border:1px solid var(--glass-border);border-radius:12px;
  padding:10px;font-size:.78rem;}
.function-card .fc-icon{font-size:1.3rem;display:block;margin-bottom:4px;}
.function-card p{color:var(--text-2);margin:4px 0 0;}
.score-summary{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;}

/* ===== Real Device Anatomy Explorer ===== */
.anatomy-container{padding:24px;}
.anatomy-toolbar{display:flex;align-items:center;gap:10px;margin-bottom:18px;flex-wrap:wrap;}
.anatomy-hint{color:var(--text-2);font-size:.82rem;margin-left:auto;}
.anatomy-stage{display:grid;grid-template-columns:320px 1fr;gap:28px;align-items:start;}
.anatomy-stage.laptop-stage{grid-template-columns:440px 1fr;}
@media (max-width:900px){.anatomy-stage,.anatomy-stage.laptop-stage{grid-template-columns:1fr;}}

.anatomy-silhouette{position:relative;width:280px;height:540px;margin:0 auto;
  background:transparent;border:none;border-radius:38px;box-shadow:0 12px 30px rgba(0,0,0,.35);}
.anatomy-silhouette.laptop{width:420px;height:388px;border-radius:16px;margin:0 auto;}
.anatomy-silhouette.laptop::before{display:none;}

.anatomy-illustration{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;
  border-radius:inherit;pointer-events:none;user-select:none;}

.anatomy-hotspot{position:absolute;width:24px;height:24px;border-radius:50%;border:none;background:transparent;
  transform:translate(-50%,-50%);cursor:pointer;padding:0;z-index:2;}
.hotspot-pulse{position:absolute;inset:0;border-radius:50%;background:var(--accent-1);opacity:.9;
  box-shadow:0 0 0 0 rgba(0,229,255,0.6);animation:hotspotPulse 2.2s infinite;}
.anatomy-hotspot.active .hotspot-pulse{background:var(--accent-3);box-shadow:0 0 0 8px rgba(255,95,162,0.3);}
@keyframes hotspotPulse{
  0%{box-shadow:0 0 0 0 rgba(0,229,255,0.55);}
  70%{box-shadow:0 0 0 12px rgba(0,229,255,0);}
  100%{box-shadow:0 0 0 0 rgba(0,229,255,0);}
}

.anatomy-detail{background:rgba(255,255,255,0.03);border:1px solid var(--glass-border);border-radius:16px;
  padding:20px;min-height:240px;}
.anatomy-detail h3{margin-top:0;color:var(--accent-1);}
.anatomy-detail .badge{margin-top:10px;display:inline-block;}
.placeholder-text{color:var(--text-2);}

.anatomy-legend{margin-top:28px;}
.anatomy-legend h3{margin-bottom:10px;font-size:1rem;}
.anatomy-legend-grid{display:flex;flex-wrap:wrap;gap:9px;}
.legend-chip{background:rgba(255,255,255,0.05);border:1px solid var(--glass-border);border-radius:20px;
  padding:7px 15px;font-size:.8rem;color:var(--text-1);cursor:pointer;transition:.2s;}
.legend-chip:hover{border-color:var(--accent-1);background:rgba(0,229,255,0.08);transform:translateY(-2px);}

/* ===== Lab table ===== */
.lab-table{width:100%;border-collapse:collapse;margin-top:14px;}
.lab-table th{text-align:left;padding:8px 10px;color:var(--accent-1);font-size:.78rem;border-bottom:1px solid var(--glass-border);}
.lab-table td{padding:8px 10px;font-size:.85rem;border-bottom:1px solid rgba(255,255,255,0.05);}
.lab-list button, .learn-list button{display:block;width:100%;text-align:left;padding:10px 12px;
  border-radius:10px;border:1px solid transparent;background:transparent;color:var(--text-2);
  cursor:pointer;margin-bottom:4px;font-size:.85rem;transition:.2s;}
.lab-list button:hover,.learn-list button:hover{background:var(--glass-bg);}
.lab-list button.active,.learn-list button.active{background:linear-gradient(135deg,rgba(0,229,255,0.16),rgba(168,85,247,0.16));
  color:var(--text-1);border-color:var(--accent-1);}

@media (max-width:640px){
  .home-hero h1{font-size:1.9rem;}
}


/* ===== Diagnostics detail rows/bars (missing previously) ===== */
.diag-row{display:flex;justify-content:space-between;font-size:.82rem;padding:6px 0;color:var(--text-2);}
.diag-row span:last-child{color:var(--text-1);font-weight:700;}
.diag-bar{height:6px;border-radius:4px;background:rgba(255,255,255,0.08);overflow:hidden;margin-bottom:8px;}
.diag-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent-1),var(--accent-5));border-radius:4px;transition:width .4s;}
.diag-bar-fill.warn{background:linear-gradient(90deg,var(--warn),var(--accent-4));}
.diag-bar-fill.danger{background:linear-gradient(90deg,var(--danger),#ff2d55);}
.diag-log{margin-top:12px;padding:10px;border-radius:10px;background:rgba(0,0,0,0.25);
  font-family:monospace;font-size:.72rem;color:var(--accent-5);max-height:160px;overflow-y:auto;line-height:1.5;}

/* ===== Wire animation / particles (missing previously) ===== */
.wire-path{stroke-dasharray:5 4;animation:wireFlow 1.2s linear infinite;}
@keyframes wireFlow{to{stroke-dashoffset:-18;}}
.particle{width:5px;height:5px;border-radius:50%;pointer-events:none;z-index:2000;
  animation:particleFloat 1.4s ease-out forwards;}
@keyframes particleFloat{to{transform:translateY(-40px);opacity:0;}}

/* ===== Mission / achievement card internals ===== */
.mission-card h3,.achievement-card h3{margin:0 0 6px;font-size:1rem;color:var(--accent-1);}
.mission-card p,.achievement-card p,.glossary-card p{color:var(--text-2);font-size:.85rem;margin:0 0 10px;}
.glossary-card h3{margin:0 0 6px;color:var(--accent-2);font-size:.95rem;}
.daily-card h3{color:var(--accent-4);margin-bottom:6px;}

/* ===== Shake animation used by .slot.error ===== */
@keyframes shake{0%,100%{transform:translateX(0);}25%{transform:translateX(-4px);}75%{transform:translateX(4px);}}

/* ===== Booting state visual feedback ===== */
.board-area.booting{animation:bootPulse 1s ease-in-out infinite;}
@keyframes bootPulse{0%,100%{box-shadow:0 0 0 0 rgba(0,229,255,0.25) inset;}50%{box-shadow:0 0 40px 6px rgba(0,229,255,0.35) inset;}}


/* ===== Laptop mode subtle board tint ===== */
.board-area.laptop-mode{background:linear-gradient(160deg,rgba(168,85,247,0.05),transparent);}

/* Diagram labels: positions use the exact same canvas as the illustration. */
.hotspot-label{position:absolute;left:16px;top:-4px;min-width:max-content;padding:3px 6px;border-radius:6px;
 background:#07111ed9;border:1px solid var(--accent-1);color:#e9fbff;font:700 10px/1 system-ui;
 opacity:0;pointer-events:none;transform:translateY(3px);transition:.16s;white-space:nowrap;}
.anatomy-hotspot:hover .hotspot-label,.anatomy-hotspot.active .hotspot-label{opacity:1;transform:translateY(0);}
.anatomy-silhouette.laptop .hotspot-label{font-size:9px;}
@media(max-width:520px){.anatomy-silhouette.laptop{width:100%;height:auto;aspect-ratio:400/370;}.anatomy-silhouette{transform:scale(.92);transform-origin:top center;margin-bottom:-42px;}}


/* ===== Guided build levels ===== */
.build-levels{margin:0 0 14px;padding:11px;border:1px solid var(--glass-border);border-radius:14px;
  background:rgba(0,0,0,.16);display:grid;gap:7px;}
.level-heading{margin:0 0 2px;color:var(--accent-4);font-size:.69rem;font-weight:800;
  text-transform:uppercase;letter-spacing:.08em;}
.build-level{display:flex;align-items:center;gap:9px;width:100%;padding:8px;border:1px solid transparent;
  border-radius:10px;background:transparent;color:var(--text-2);cursor:pointer;text-align:left;transition:.18s;}
.build-level:hover{background:rgba(255,255,255,.05);color:var(--text-1);}
.build-level.active{background:linear-gradient(135deg,rgba(0,229,255,.15),rgba(168,85,247,.17));
  border-color:var(--accent-1);color:var(--text-1);}
.level-number{display:grid;place-items:center;flex:0 0 30px;width:30px;height:30px;border-radius:9px;
  background:rgba(255,255,255,.09);color:var(--accent-4);font-size:.72rem;font-weight:900;}
.build-level.active .level-number{background:linear-gradient(135deg,var(--accent-1),var(--accent-2));color:#06101c;}
.build-level strong{display:block;font-size:.78rem;}
.build-level small{display:block;margin-top:2px;font-size:.66rem;color:var(--text-2);}
.level-progress{padding:8px 5px 1px;color:var(--accent-5);font-size:.7rem;font-weight:700;line-height:1.35;}


/* ===== Build-complete celebration ===== */
.celebration-overlay{position:fixed;inset:0;z-index:3000;display:none;place-items:center;
  background:rgba(4,8,18,.68);backdrop-filter:blur(7px);padding:18px;}
.celebration-overlay.active{display:grid;animation:celebrationFade .25s ease both;}
.celebration-card{position:relative;width:min(420px,94vw);padding:30px 28px 26px;text-align:center;overflow:hidden;
  border:1px solid rgba(0,229,255,.65);border-radius:26px;color:var(--text-1);
  background:radial-gradient(circle at 50% 14%,rgba(0,229,255,.18),transparent 30%),linear-gradient(145deg,#151e36,#0c1020);
  box-shadow:0 0 0 4px rgba(168,85,247,.1),0 18px 80px rgba(0,0,0,.6);animation:celebrationPop .48s cubic-bezier(.2,.9,.2,1) both;}
.celebration-close{position:absolute;right:12px;top:12px;border:0;background:rgba(255,255,255,.09);color:var(--text-1);
  width:30px;height:30px;border-radius:9px;cursor:pointer;font-size:.9rem;z-index:3;}
.celebration-kicker{margin:14px 0 5px;color:var(--accent-4);font-size:.7rem;font-weight:900;letter-spacing:.14em;}
.celebration-card h2{margin:0;background:linear-gradient(90deg,var(--accent-1),#fff,var(--accent-3));-webkit-background-clip:text;background-clip:text;color:transparent;font-size:2rem;}
.celebration-card>p:not(.celebration-kicker){color:var(--text-2);margin:8px 0 15px;}
.built-device{position:relative;display:grid;place-items:center;margin:0 auto;width:108px;height:155px;border-radius:20px;
  background:linear-gradient(145deg,#344863,#101928);border:4px solid #71dbff;box-shadow:0 0 24px rgba(0,229,255,.7),inset 0 0 18px rgba(0,229,255,.26);
  animation:deviceFloat 2s ease-in-out infinite;overflow:hidden;}
.built-device.laptop{width:180px;height:110px;border-radius:12px;}
.built-device span{font-size:3.3rem;filter:drop-shadow(0 3px 4px #000);z-index:1;}
.built-device.laptop span{font-size:4rem;}
.device-scan{position:absolute;left:6px;right:6px;height:3px;background:var(--accent-5);box-shadow:0 0 12px var(--accent-5);animation:deviceScan 1.45s linear infinite;}
.celebration-score{display:inline-block;margin:2px 0 17px;padding:9px 14px;border-radius:16px;color:#07111d;font-weight:900;
  background:linear-gradient(90deg,var(--accent-4),var(--accent-5));}
.confetti-field{position:absolute;inset:0;pointer-events:none;overflow:hidden;}
.confetti-field span{position:absolute;left:var(--x);top:-25px;font-size:1.2rem;animation:confettiFall calc(1.7s + var(--i)*.08s) ease-in forwards;animation-delay:calc(var(--i)*.035s);}
@keyframes celebrationFade{from{opacity:0}to{opacity:1}}
@keyframes celebrationPop{from{opacity:0;transform:scale(.68) translateY(32px)}to{opacity:1;transform:scale(1) translateY(0)}}
@keyframes deviceFloat{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-9px) rotate(1deg)}}
@keyframes deviceScan{from{top:8%}to{top:94%}}
@keyframes confettiFall{to{top:108%;transform:rotate(540deg);opacity:0}}

.built-device.badge-device{width:118px;height:118px;border-radius:50%;background:radial-gradient(circle,#274c67,#101827 65%);}
.built-device.badge-device span{font-size:4.4rem;}
.celebration-card.level-1{border-color:var(--accent-5);}
.celebration-card.level-2{border-color:var(--accent-4);}
.celebration-card.level-3{border-color:var(--accent-2);}


/* ===== Anatomy: clear diagram and explanation layout ===== */
.anatomy-minimum{display:grid;grid-template-columns:42px 1fr;gap:12px;align-items:start;margin:0 0 20px;padding:14px 16px;
  border:1px solid rgba(255,210,63,.4);border-radius:14px;background:linear-gradient(100deg,rgba(255,210,63,.10),rgba(0,229,255,.05));}
.minimum-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:rgba(255,210,63,.16);font-size:1.3rem;}
.minimum-eyebrow{margin:0 0 3px;color:var(--accent-4);font-size:.66rem;font-weight:900;letter-spacing:.1em;}
.anatomy-minimum h3{margin:0 0 5px;color:var(--text-1);font-size:.97rem;}
.anatomy-minimum p:last-child{margin:0;color:var(--text-2);font-size:.82rem;line-height:1.45;}
.anatomy-stage{grid-template-columns:minmax(300px,400px) minmax(320px,1fr);align-items:start;}
.anatomy-stage.anatomy-detail{position:relative;z-index:4;min-height:260px;overflow-wrap:anywhere;}
.anatomy-silhouette{z-index:1;}
.anatomy-silhouette.laptop{z-index:1;}
@media(max-width:900px){.anatomy-detail{min-height:160px;}.anatomy-silhouette.laptop{margin:0 auto;}}
@media(max-width:520px){.anatomy-minimum{grid-template-columns:1fr;}.minimum-icon{display:none;}}

/* Sound button: always visible feedback for children. */
.sound-btn{position:relative;border-color:var(--accent-5);box-shadow:0 0 12px rgba(57,255,143,.22);}
.sound-btn::after{content:"ON";position:absolute;right:-5px;bottom:-4px;padding:1px 3px;border-radius:4px;background:var(--accent-5);color:#061019;font-size:6px;font-weight:900;}
.sound-btn.muted{border-color:var(--danger);box-shadow:none;}
.sound-btn.muted::after{content:"OFF";background:var(--danger);color:white;}

/* Base shape for the CSS Phone */
.mock-device {
  position: relative;
  width: 280px; 
  height: 560px; /* Realistic smartphone proportions */
  border-radius: 35px;
  border: 8px solid #2a2d35; /* Dark phone casing/bezel */
  box-shadow: 0 10px 25px rgba(0,0,0,0.5), inset 0 0 10px rgba(0,0,0,0.8);
  margin: 0 auto;
  overflow: hidden;
}

/* --- THE FRONT SCREEN DESIGN --- */
.mobile-front {
  /* Colorful gradient wallpaper */
  background: linear-gradient(135deg, #FF5EDF 0%, #00d2ff 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Fake camera notch at the top of the screen */
.mobile-front::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 25px;
  background-color: #2a2d35;
  border-radius: 0 0 15px 15px;
}

/* Time and OS Text on the screen */
.mobile-front::after {
  content: 'BhāvaOS \\A 10:41 AM'; /* The \A creates a line break */
  white-space: pre-wrap;
  text-align: center;
  color: white;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin-top: 80px; /* Pushes text down below the notch */
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* --- THE INSIDE MOTHERBOARD DESIGN --- */
.mobile-inside {
  /* Dark tech-green background */
  background-color: #1a2b25; 
  
  /* Creates a cool grid/circuit board pattern */
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(0, 210, 255, 0.1) 2px, transparent 2px),
    linear-gradient(0deg, transparent 49%, rgba(0, 255, 100, 0.05) 50%, transparent 51%),
    linear-gradient(90deg, transparent 49%, rgba(0, 255, 100, 0.05) 50%, transparent 51%);
  background-size: 20px 20px, 40px 40px, 40px 40px;
}

/* Fake Battery block inside the phone */
.mobile-inside::after {
  content: 'BATTERY \A 4500 mAh';
  white-space: pre-wrap;
  position: absolute;
  width: 140px;
  height: 220px;
  background: #222;
  border: 2px solid #333;
  border-radius: 8px;
  bottom: 50px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #555;
  font-family: sans-serif;
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 1px;
}