/* Shared blue and purple science lab styling. Simulation diagrams retain their scientific colors. */
:root{--accent:#5254cf;--pale:#f0edff}header{background:linear-gradient(110deg,#172b59,#3e2966);color:#fff;border-bottom:0}header a,header strong em{color:#e2dafa}header span{background:#ffffff18;color:#ece6ff}header .science-home{color:inherit;text-decoration:none;display:inline-flex;align-items:center;font:inherit}header .science-home strong{color:#fff}.hero{background:linear-gradient(120deg,#edf3ff,#f1eafa);border-color:#e2ddf4}.hero h1 em{color:#6c4bb8}.hero a,.primary,.primary:hover{background:linear-gradient(110deg,#3158df,#7650c6);color:white}.hero .eyebrow,.eyebrow,.side .label,.illustration-kicker{color:#6250b0}.grade-tags .selected,.term-tabs .selected,nav .active{background:#5047a5;border-color:#5047a5;color:#fff}nav button.active{border-color:#7760c9}nav .card-link{color:#6050b4}.side{border-top-color:#8b6bcb}.teacher-banner{background:linear-gradient(110deg,#edf3ff,#f1edfb);border-color:#e0daf3}.statusbadge{color:#6250b0;background:#eeeafa}input[type=range]{accent-color:#7154c3}header a:focus-visible{outline:3px solid #c8b5ff;outline-offset:4px}button:focus-visible,a:focus-visible{outline-color:#9872db}@media(max-width:850px){header a.science-home{display:inline-flex}}
/* Rounded discovery navigation */
header.discovery-nav{position:relative;isolation:isolate;overflow:hidden;max-width:1200px;margin:22px auto 0;padding:22px 28px;min-height:94px;border-radius:24px;display:flex;align-items:center;justify-content:space-between;gap:24px;background:radial-gradient(ellipse at 0 0,#3098dd77,transparent 44%),linear-gradient(108deg,#204caa 0%,#3433a5 55%,#7524c2 100%);box-shadow:0 17px 35px #6543cc25,inset 0 1px 0 #ffffff35;border:1px solid #8ca7ef35;color:#fff}
header.discovery-nav:before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at 41% 210%,#8297ff35 0 47%,transparent 47.4%),radial-gradient(ellipse at 83% 190%,#ab7bff30 0 42%,transparent 42.4%)}
header.discovery-nav:after{content:"";position:absolute;width:150px;height:150px;left:30%;top:8px;border-top:1px solid #a9adf755;border-radius:50%;transform:rotate(25deg);z-index:-1;pointer-events:none}
header.discovery-nav .science-home{display:flex;gap:15px;flex-shrink:0;align-items:center;color:white}
header.discovery-nav .science-home strong{font-size:clamp(17px,2vw,25px);letter-spacing:-.7px;white-space:nowrap}
header.discovery-nav .science-home em{font-style:normal;color:inherit}
header.discovery-nav .nav-flask{width:58px;height:58px;flex-shrink:0;padding-right:14px;border-right:1px solid #c5ceff44;overflow:visible}
header.discovery-nav>a:not(.science-home){display:inline-flex;align-items:center;justify-content:center;min-height:44px;color:#fff;font-size:14px;font-weight:600;white-space:nowrap;padding:8px 3px;border-radius:8px;transition:background .2s,transform .2s}
header.discovery-nav>a:not(.science-home):hover{background:#ffffff15;transform:translateY(-2px)}
header.discovery-nav>span{font-size:12px;font-weight:800;white-space:nowrap;border:1px solid #d8c6ff20;border-radius:30px;background:linear-gradient(120deg,#ad8be46b,#b57aeb66);padding:13px 20px;color:#fff;letter-spacing:.1px;box-shadow:inset 0 1px 0 #ffffff16}
header.discovery-nav a:focus-visible{outline:3px solid #e2d1ff;outline-offset:5px}
@media(max-width:1250px){header.discovery-nav{margin:18px 22px 0}}
@media(max-width:950px){header.discovery-nav{gap:15px;padding:18px 20px;flex-wrap:wrap}header.discovery-nav .science-home{flex:1}header.discovery-nav>span{order:2}header.discovery-nav>a:not(.science-home){order:3;flex:1;background:#ffffff09}header.discovery-nav .science-home strong{font-size:22px}}
@media(max-width:550px){header.discovery-nav{margin:12px 14px 0;border-radius:18px;padding:16px;gap:12px}header.discovery-nav .science-home{gap:9px;flex-basis:100%}header.discovery-nav .science-home strong{font-size:20px}header.discovery-nav .nav-flask{width:45px;height:45px;padding-right:10px}header.discovery-nav>span{font-size:10px;padding:8px 12px;margin-left:54px}header.discovery-nav>a:not(.science-home){font-size:12px;flex-basis:calc(50% - 8px)}}
@media(prefers-reduced-motion:reduce){header.discovery-nav a{transition:none!important}}