.app-layout{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(180deg,#dae4ff,#eef2ff 55%,#f7f9ff);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#0f172a;transition:background .3s ease}.dark-theme .app-layout{background:linear-gradient(180deg,#0a0e1a,#0f172a 55% 100%);color:#f1f5f9}.dark-theme .app-layout__nav{background:#0f172af2;border:1px solid rgba(148,163,184,.1)}.dark-theme .app-layout__nav button{color:#94a3b8}.dark-theme .app-layout__nav button.active{color:#818cf8;background:#6366f133}.dark-theme .icon-button{background:#1e293be6;color:#f1f5f9}.dark-theme h1,.dark-theme h2,.dark-theme h3,.dark-theme h4{color:#0071ff!important}.app-layout__header{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding-top:calc(20px + env(safe-area-inset-top,0px));padding-right:clamp(16px,8vw,48px);padding-bottom:12px;padding-left:clamp(16px,8vw,48px);gap:12px;position:relative;z-index:10}.app-layout__header .header-left,.app-layout__header .header-center,.app-layout__header .header-right{display:flex;align-items:center}.header-left{justify-content:flex-start}.header-center{justify-content:center}.header-right{justify-content:flex-end}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:14px;background:#ffffffe6;text-decoration:none;color:inherit;box-shadow:0 22px 48px -30px #4f46e559}.header-logo{width:clamp(64px,10vw,88px);height:clamp(64px,10vw,88px);object-fit:contain;display:block;border-radius:0}.app-layout__content{flex:1;padding-left:calc(clamp(16px,8vw,64px) + env(safe-area-inset-left,0px));padding-right:calc(clamp(16px,8vw,64px) + env(safe-area-inset-right,0px));padding-bottom:96px;display:flex;flex-direction:column;gap:24px;overflow-x:hidden;width:100%;box-sizing:border-box}.app-layout__nav{position:fixed;left:50%;bottom:calc(16px + env(safe-area-inset-bottom,0px));transform:translate(-50%);width:min(420px,calc(100% - 32px));background:#fffffff2;border-radius:28px;box-shadow:0 45px 75px -45px #4f46e566;display:grid;grid-template-columns:repeat(4,1fr);padding:10px 4px;z-index:20}.app-layout__nav button{border:none;background:none;display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 0;color:#6b7280;font-weight:600;border-radius:18px}.app-layout__nav button.active{color:#4338ca;background:#6366f11f}.app-layout__nav button span.material-symbols-outlined{font-size:22px}@media(min-width:768px){.app-layout__content{padding-bottom:120px}}html,body{touch-action:pan-x pan-y pinch-zoom;-webkit-text-size-adjust:100%;text-size-adjust:100%}.app-layout__content,.math-card,.analysis-card,.chat-messages,.quiz-container,.flashcards-container,.dashboard-content,.home-content{touch-action:pan-x pan-y pinch-zoom;-webkit-user-select:text;user-select:text}p,h1,h2,h3,h4,h5,h6,li,span:not(.subtitle-badge),div:not(.danger-button):not(.icon-button){-webkit-user-select:text;user-select:text}button,input,textarea,select,a{touch-action:manipulation}button *{touch-action:pan-x pan-y pinch-zoom;-webkit-user-select:text;user-select:text}.splash-screen{position:fixed;inset:0;z-index:9999;background:linear-gradient(135deg,#6366f1,#7c3aed,#9333ea);display:flex;align-items:center;justify-content:center;opacity:1;transition:opacity .5s ease-out;pointer-events:none}.splash-screen.fade-out{opacity:0}.splash-content{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px}.splash-logo-container{position:relative;display:flex;align-items:center;justify-content:center;animation:logoEntrance 1s ease-out}.splash-logo{width:clamp(120px,30vw,180px);height:clamp(120px,30vw,180px);object-fit:contain;filter:drop-shadow(0 20px 40px rgba(0,0,0,.3));animation:logoFloat 3s ease-in-out infinite;position:relative;z-index:2}.splash-pulse-ring{position:absolute;width:clamp(120px,30vw,180px);height:clamp(120px,30vw,180px);border:3px solid rgba(255,255,255,.6);border-radius:50%;animation:pulseRing 2s cubic-bezier(.4,0,.2,1) infinite;z-index:1}.splash-pulse-ring.delay-1{animation-delay:.6s}.splash-pulse-ring.delay-2{animation-delay:1.2s}@keyframes logoEntrance{0%{opacity:0;transform:scale(.5) translateY(30px)}60%{transform:scale(1.1) translateY(-10px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes logoFloat{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-10px) rotate(2deg)}}@keyframes pulseRing{0%{transform:scale(1);opacity:1}to{transform:scale(2.5);opacity:0}}.dark-theme .splash-screen{background:linear-gradient(135deg,#4338ca,#5b21b6,#6b21a8)}:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-weight:400;color:#0f172a;background-color:#f8fafc;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:transparent}#root{width:100%}a{color:inherit}.placeholder-page{background:#ffffffe6;border-radius:28px;padding:clamp(24px,4vw,36px);box-shadow:0 45px 75px -50px #4f46e552;text-align:center;display:grid;gap:12px;justify-items:center;color:#1f2f50}.placeholder-page h1{margin:0}.placeholder-page p{margin:0;color:#4b5a7a}.dark-theme body{background-color:#0f172a;color:#e2e8f0}.dark-theme .analysis-card,.dark-theme .settings-section,.dark-theme .math-card,.dark-theme .quiz-card,.dark-theme .flashcards-page,.dark-theme .history-card,.dark-theme .subscription-card,.dark-theme .placeholder-page{background:#0f172ad9;color:#e2e8f0;box-shadow:0 45px 75px -45px #082f498c}.dark-theme .primary{box-shadow:0 25px 55px -30px #3b82f68c}.dark-theme .ghost,.dark-theme .link-button,.dark-theme .upload-button,.dark-theme .theme-toggle.light{background:#33415566;color:#bfdbfe}.dark-theme .secondary{background:#ca8a0459;color:#fde68a}.dark-theme .danger-button{background:#ef444459;color:#fecaca}.dark-theme .status-text,.dark-theme .slider-label p,.dark-theme .subscription .plan-copy{color:#cbd5f5}.dark-theme .analysis-card textarea,.dark-theme .profile-form input,.dark-theme .select-row select{background:#1e293bbf;border-color:#94a3b859;color:#f8fafc}input[type=text],input[type=email],input[type=password],input[type=number],input[type=search],textarea,select{font-size:16px}@media(min-width:768px){input[type=text],input[type=email],input[type=password],input[type=number],input[type=search],textarea,select{font-size:1rem}}