/* Myers Science Hub Premium — unified 2026 interface layer */
:root {
  --msh-ink: #102a43;
  --msh-navy: #123a5a;
  --msh-teal: #137d89;
  --msh-cyan: #2bb9c3;
  --msh-coral: #ea7358;
  --msh-sky: #e8f7fa;
  --msh-surface: rgba(255,255,255,.96);
  --msh-line: #d7e7ed;
  --msh-muted: #62778a;
  --msh-shadow: 0 18px 50px rgba(17,58,84,.10);
  --msh-shadow-hover: 0 22px 60px rgba(17,58,84,.16);
  --msh-radius: 22px;
  color-scheme: light;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body.msh-modern {
  min-width: 0;
  color: var(--msh-ink) !important;
  background:
    radial-gradient(circle at 8% 8%, rgba(43,185,195,.12), transparent 28rem),
    radial-gradient(circle at 94% 28%, rgba(234,115,88,.08), transparent 24rem),
    linear-gradient(180deg, #fafdff 0%, #f2f8fa 58%, #edf5f8 100%) !important;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}

body.msh-modern *, body.msh-modern *::before, body.msh-modern *::after { box-sizing: border-box; }
body.msh-modern ::selection { color: #fff; background: var(--msh-teal); }

.msh-skip-link {
  position: fixed; z-index: 100000; top: 10px; left: 10px; transform: translateY(-160%);
  padding: 11px 16px; border-radius: 12px; color: #fff; background: var(--msh-navy);
  font-weight: 850; text-decoration: none; box-shadow: var(--msh-shadow);
}
.msh-skip-link:focus { transform: translateY(0); }

body.msh-modern :is(input, select, textarea) {
  max-width: 100%; border: 1px solid #cbdde4 !important; border-radius: 13px !important;
  color: var(--msh-ink) !important; background: rgba(255,255,255,.96) !important;
  box-shadow: 0 1px 2px rgba(16,42,67,.03); transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
body.msh-modern :is(input, select, textarea)::placeholder { color: #8194a4; opacity: 1; }
body.msh-modern :is(input, select, textarea):focus {
  outline: none !important; border-color: var(--msh-teal) !important;
  box-shadow: 0 0 0 4px rgba(19,125,137,.14) !important; background: #fff !important;
}
body.msh-modern :is(button, .btn, .download, [role="button"]) {
  min-height: 44px; border-radius: 13px !important; font-family: inherit !important;
  font-weight: 800 !important; letter-spacing: .01em; transition: transform .18s ease, box-shadow .18s ease, filter .18s ease, border-color .18s ease;
}
body.msh-modern :is(button, .btn, .download, [role="button"]):not(:disabled):hover {
  transform: translateY(-2px); box-shadow: 0 10px 24px rgba(18,58,90,.16); filter: saturate(1.06);
}
body.msh-modern :is(button, .btn, .download, [role="button"]):focus-visible,
body.msh-modern a:focus-visible {
  outline: 3px solid rgba(43,185,195,.48) !important; outline-offset: 3px !important;
}
body.msh-modern button:disabled { cursor: not-allowed !important; opacity: .52 !important; }

body.msh-modern :is(.card, .panel, .question-card, .quiz-card, .main-card, .score-card, .resource, .question-row) {
  border-color: var(--msh-line) !important; border-radius: var(--msh-radius) !important;
  background: var(--msh-surface) !important; box-shadow: var(--msh-shadow) !important;
}
body.msh-modern :is(.card, .panel, .question-card, .main-card, .resource, .question-row) {
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
body.msh-modern :is(.resource, .question-row):hover { border-color: #abd4dc !important; box-shadow: var(--msh-shadow-hover) !important; }
body.msh-modern :is(h1, h2, h3, h4) { letter-spacing: -.025em; text-wrap: balance; }
body.msh-modern p { text-wrap: pretty; }
body.msh-modern label { color: var(--msh-navy) !important; }
body.msh-modern :is(.sub, .muted, .hint, .caption, .subtitle) { color: var(--msh-muted) !important; }

body.msh-modern :is(.topbar, .hero) {
  isolation: isolate; position: relative; overflow: hidden;
  background: linear-gradient(122deg, #0c3150 0%, #125c70 62%, #178c93 100%) !important;
  border-bottom: 4px solid var(--msh-cyan) !important; box-shadow: 0 14px 36px rgba(12,49,80,.18) !important;
}
body.msh-modern :is(.topbar, .hero)::after {
  content: ""; position: absolute; z-index: -1; inset: 0; pointer-events: none; opacity: .28;
  background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px);
  background-size: 32px 32px; mask-image: linear-gradient(90deg, transparent, #000 45%, #000);
}
body.msh-modern :is(.brand-logo, .footer-logo, .logo, .logo-box img, .logo-wrap) { background: #fff !important; }
body.msh-modern img { max-width: 100%; }

.msh-table-scroll { width: 100%; max-width: 100%; overflow-x: auto; border-radius: 16px; border: 1px solid var(--msh-line); }
.msh-table-scroll table { margin: 0 !important; min-width: 650px; }
body.msh-modern table { border-collapse: separate !important; border-spacing: 0 !important; }
body.msh-modern th { background: #edf6f8 !important; color: var(--msh-navy) !important; font-weight: 850 !important; }
body.msh-modern :is(th, td) { border-color: var(--msh-line) !important; }
body.msh-modern tbody tr:nth-child(even) { background: rgba(232,247,250,.38); }
body.msh-modern tbody tr:hover { background: rgba(43,185,195,.08); }

/* Premium login */
body.msh-login { display: grid !important; place-items: center !important; min-height: 100vh; padding: clamp(18px, 4vw, 48px); }
.msh-login .login-shell {
  width: min(1060px, 100%); min-height: 650px; display: grid; grid-template-columns: minmax(0,.9fr) minmax(420px,1.1fr);
  overflow: hidden; border: 1px solid rgba(171,212,220,.8); border-radius: 30px; background: rgba(255,255,255,.82);
  box-shadow: 0 34px 90px rgba(17,58,84,.16); backdrop-filter: blur(18px);
}
.msh-login .login-brand {
  position: relative; isolation: isolate; overflow: hidden; padding: clamp(32px,5vw,62px); color: #fff;
  background: linear-gradient(145deg, #0c3150, #126a78 72%, #28aeb8);
  display: flex; flex-direction: column; justify-content: space-between; gap: 36px;
}
.msh-login .login-brand::after {
  content: ""; position: absolute; z-index: -1; width: 360px; height: 360px; right: -160px; bottom: -120px;
  border: 54px solid rgba(255,255,255,.10); border-radius: 50%;
}
.msh-login .login-logo { width: 96px; height: 96px; object-fit: contain; padding: 7px; border-radius: 22px; background: #fff; box-shadow: 0 18px 34px rgba(0,0,0,.16); }
.msh-login .brand-eyebrow { margin: 20px 0 8px; color: #a9f5f5; font-size: .78rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.msh-login .login-brand h2 { max-width: 430px; margin: 0; color: #fff; font-size: clamp(2rem,4vw,3.4rem); line-height: 1.02; }
.msh-login .login-brand p { max-width: 430px; color: #e5fbfc; font-size: 1.02rem; line-height: 1.7; }
.msh-login .trust-row { display: flex; flex-wrap: wrap; gap: 9px; margin: 0; padding: 0; list-style: none; }
.msh-login .trust-row li { padding: 8px 11px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; background: rgba(255,255,255,.10); font-size: .78rem; font-weight: 800; }
.msh-login .login-panel { display: grid; place-items: center; padding: clamp(30px,5vw,64px); }
.msh-login .card { width: 100% !important; max-width: 480px; padding: 0 !important; border: 0 !important; box-shadow: none !important; background: transparent !important; }
.msh-login .card h1 { font-size: clamp(1.8rem,3vw,2.45rem); }
.msh-login .card > p { margin-bottom: 28px; }
.msh-login .card label { margin-top: 18px; }
.msh-login .card input { min-height: 52px; }
.msh-login #loginBtn { min-height: 54px; margin-top: 24px; background: linear-gradient(135deg, var(--msh-teal), #0f6974) !important; }
.msh-login .msg:empty { display: none; }
.msh-login .msg { padding: 12px 14px; border-radius: 12px; background: var(--msh-sky); }

/* Dashboard */
body.msh-dashboard .app { grid-template-columns: 286px minmax(0,1fr) !important; }
body.msh-dashboard aside {
  position: sticky; top: 0; height: 100vh; overflow-y: auto; padding: 25px 18px !important;
  background: linear-gradient(180deg, #0b2f4d 0%, #10536a 66%, #137d89 100%) !important;
  box-shadow: 14px 0 40px rgba(12,49,80,.12);
}
body.msh-dashboard aside .brand { padding: 7px 8px 25px; border-bottom: 1px solid rgba(255,255,255,.14); }
body.msh-dashboard aside .logo-wrap { width: 56px; height: 56px; border-radius: 16px; }
body.msh-dashboard .nav { display: grid; gap: 8px; margin-top: 20px; }
body.msh-dashboard .nav button { position: relative; min-height: 50px; padding: 13px 14px 13px 44px !important; border: 1px solid transparent !important; border-radius: 14px !important; }
body.msh-dashboard .nav button::before { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); font-size: 1.05rem; }
body.msh-dashboard .nav button[data-view="resources"]::before { content: "◫"; }
body.msh-dashboard .nav button[data-view="builder"]::before { content: "✦"; }
body.msh-dashboard .nav button[data-view="reports"]::before { content: "▥"; }
body.msh-dashboard .nav button.active { background: rgba(255,255,255,.16) !important; border-color: rgba(255,255,255,.17) !important; box-shadow: inset 3px 0 0 #77edf0; }
body.msh-dashboard main { min-width: 0; padding: clamp(20px,3vw,38px) !important; }
body.msh-dashboard .topbar {
  padding: 24px !important; border: 1px solid var(--msh-line) !important; border-radius: 24px !important;
  background: linear-gradient(120deg, rgba(255,255,255,.98), rgba(232,247,250,.86)) !important;
  box-shadow: var(--msh-shadow) !important;
}
body.msh-dashboard .topbar::after { opacity: .16; }
body.msh-dashboard .topbar h2 { color: var(--msh-navy) !important; }
body.msh-dashboard .pill { background: #fff; box-shadow: 0 8px 20px rgba(17,58,84,.06); }
body.msh-dashboard .grid { gap: 18px !important; }
body.msh-dashboard .card { padding: 21px !important; }
body.msh-dashboard .metric { min-height: 118px; background: linear-gradient(145deg,#fff,#f5fbfc) !important; }
body.msh-dashboard .metric strong { display: block; margin-top: 5px; font-size: clamp(2rem,4vw,2.7rem); }
body.msh-dashboard :is(.resource-list,.question-list,.selected-panel) { scrollbar-color: #a7d8de transparent; }
body.msh-dashboard .resource { grid-template-columns: minmax(0,1fr) auto; align-items: center; padding: 16px 17px !important; }
body.msh-dashboard .tag { border: 1px solid rgba(19,125,137,.12); }

/* Custom quiz */
body.msh-custom > header { position: relative; padding: 26px 20px 28px !important; background: linear-gradient(122deg,#0c3150,#126a78) !important; border-bottom: 4px solid var(--msh-cyan) !important; }
body.msh-custom > header::after { content: ""; position: absolute; inset: 0; opacity: .18; pointer-events: none; background-image: radial-gradient(#fff 1px,transparent 1px); background-size: 20px 20px; }
body.msh-custom > header > * { position: relative; z-index: 1; }
body.msh-custom .msh-brandline { display: flex; justify-content: center; align-items: center; gap: 10px; margin-bottom: 12px; color: #bff7f8; font-size: .76rem; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
body.msh-custom .msh-brandline img { width: 38px; height: 38px; object-fit: contain; padding: 3px; border-radius: 10px; background: #fff; }
body.msh-custom main { max-width: 1260px !important; grid-template-columns: minmax(270px,330px) minmax(0,1fr) !important; gap: 22px !important; margin: 28px auto !important; }
body.msh-custom main > aside { position: sticky; top: 18px; align-self: start; }
body.msh-custom .card { padding: 22px !important; }
body.msh-custom .option { max-width: none !important; min-height: 62px; border-color: var(--msh-line) !important; }
body.msh-custom .option.selected { background: linear-gradient(90deg,rgba(43,185,195,.13),rgba(255,255,255,.98)) !important; box-shadow: inset 4px 0 0 var(--msh-teal) !important; }

/* MCQ library pages */
body.msh-mcq .topbar { grid-template-columns: minmax(220px,270px) minmax(0,1fr) minmax(210px,250px) !important; padding: 16px clamp(16px,3vw,36px) !important; }
body.msh-mcq .brand-logo { width: 76px !important; height: 76px !important; border-radius: 16px !important; }
body.msh-mcq .quiz-title h1 { font-size: clamp(1.55rem,2.8vw,2.3rem) !important; }
body.msh-mcq .layout { max-width: 1500px !important; grid-template-columns: minmax(280px,320px) minmax(0,1fr) !important; gap: 22px !important; padding: 24px !important; }
body.msh-mcq .layout > aside { position: sticky; top: 16px; align-self: start; }
body.msh-mcq .card-head { background: linear-gradient(120deg,#123a5a,#176575) !important; }
body.msh-mcq .quiz-card { min-height: 560px !important; padding: clamp(22px,3vw,36px) !important; }
body.msh-mcq .q-badge { background: linear-gradient(135deg,#123a5a,#176575) !important; }
body.msh-mcq .option { max-width: none !important; min-height: 64px !important; border-color: var(--msh-line) !important; border-radius: 16px !important; box-shadow: 0 4px 14px rgba(17,58,84,.04) !important; }
body.msh-mcq .option.selected { background: linear-gradient(90deg,rgba(43,185,195,.14),#fff) !important; border-color: var(--msh-teal) !important; box-shadow: inset 4px 0 0 var(--msh-teal) !important; }
body.msh-mcq .footer { background: linear-gradient(120deg,#0c3150,#126a78) !important; }

/* ATP and paper assessment pages */
body:is(.msh-atp,.msh-paper) .hero { padding: 20px 16px !important; }
body:is(.msh-atp,.msh-paper) .hero-inner { max-width: 1240px !important; }
body:is(.msh-atp,.msh-paper) :is(.wrap,.container,.shell) { width: min(1240px,calc(100% - 28px)) !important; max-width: 1240px !important; }
body:is(.msh-atp,.msh-paper) .card { padding: clamp(18px,2.5vw,28px) !important; }
body:is(.msh-atp,.msh-paper) .part { border: 1px solid var(--msh-line) !important; border-left: 5px solid var(--msh-teal) !important; border-radius: 16px !important; background: linear-gradient(110deg,rgba(232,247,250,.6),rgba(255,255,255,.96)) !important; }
body:is(.msh-atp,.msh-paper) :is(.image-panel,.diagram,.diagram-shell,.molecule-box) { border-color: var(--msh-line) !important; border-radius: 17px !important; background: #fff !important; }
body:is(.msh-atp,.msh-paper) .actions { padding-top: 6px; }

@media (max-width: 1000px) {
  .msh-login .login-shell { grid-template-columns: 1fr; }
  .msh-login .login-brand { min-height: 330px; }
  body.msh-dashboard .app { grid-template-columns: 1fr !important; }
  body.msh-dashboard aside { position: relative; height: auto; overflow: visible; }
  body.msh-dashboard .nav { grid-template-columns: repeat(3,minmax(0,1fr)); }
  body.msh-dashboard .nav button { padding: 12px !important; text-align: center !important; }
  body.msh-dashboard .nav button::before { display: none; }
  body.msh-mcq .topbar { grid-template-columns: 1fr !important; text-align: center; }
  body.msh-mcq .brand { justify-content: center; }
  body.msh-mcq .layout { grid-template-columns: 1fr !important; }
  body.msh-mcq .layout > aside { position: static; }
  body.msh-custom main { grid-template-columns: 1fr !important; }
  body.msh-custom main > aside { position: static; }
}

@media (max-width: 680px) {
  body.msh-login { padding: 10px; }
  .msh-login .login-shell { min-height: 0; border-radius: 22px; }
  .msh-login .login-brand { min-height: 285px; padding: 30px 25px; }
  .msh-login .login-logo { width: 70px; height: 70px; }
  .msh-login .login-panel { padding: 30px 24px 38px; }
  body.msh-dashboard .nav { grid-template-columns: 1fr; }
  body.msh-dashboard .topbar { align-items: stretch !important; }
  body.msh-dashboard .pill { text-align: center; }
  body.msh-dashboard .resource { grid-template-columns: 1fr; }
  body.msh-mcq .layout { padding: 14px !important; }
  body.msh-mcq .brand-logo { width: 62px !important; height: 62px !important; }
  body.msh-modern :is(.actions,.btn-row,.downloads) > :is(button,.btn,.download) { flex: 1 1 100%; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body.msh-modern *, body.msh-modern *::before, body.msh-modern *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media print {
  body.msh-modern { background: #fff !important; }
  .msh-skip-link { display: none !important; }
  body.msh-modern :is(.card,.panel,.question-card,.quiz-card,.main-card) { box-shadow: none !important; break-inside: avoid; }
  .msh-table-scroll { overflow: visible; border: 0; }
}