/* Orbit Path · App Store Cobalt. Catalogue presentation only. */
.sr-enhanced {
  --sr-paper: #f5f7fb;
  --sr-paper-2: #e8edf5;
  --sr-surface: rgba(255, 255, 255, .84);
  --sr-surface-solid: #fff;
  --sr-ink: #14213d;
  --sr-ink-2: #3e4e68;
  --sr-muted: #617087;
  --sr-line: rgba(20, 33, 61, .11);
  --sr-line-strong: rgba(20, 33, 61, .18);
  --sr-accent: #00745b;
  --sr-accent-2: #009b77;
  --sr-accent-soft: #dff3ed;
  --sr-accent-rgb: 0, 116, 91;
  --sr-deep: #0a1626;
  --sr-deep-2: #152e52;
  --sr-cobalt: #0071e3;
  --sr-metal: #7d91ab;
  --sr-metal-soft: #dce5f0;
  --sr-on-accent: #fff;
  --sr-shadow: 0 34px 100px rgba(21,35,55,.12), inset 0 1px 0 rgba(255,255,255,.92);
  --sr-ease: cubic-bezier(.2,.8,.2,1);
  color: var(--sr-ink);
  background-color: var(--sr-paper);
  background-image:
    radial-gradient(circle at 1% 7%, rgba(var(--sr-accent-rgb),.13), transparent 27rem),
    radial-gradient(circle at 99% 25%, rgba(0,113,227,.1), transparent 31rem),
    linear-gradient(180deg, var(--sr-paper), color-mix(in srgb,var(--sr-paper) 86%,#fff));
  background-attachment: fixed;
}

.sr-enhanced.uc-jee {
  --sr-accent: #b64a26;
  --sr-accent-2: #de6a42;
  --sr-accent-soft: #f8e5dd;
  --sr-accent-rgb: 182, 74, 38;
  --sr-on-accent: #fff;
}

html[data-theme="dark"] .sr-enhanced,
.sr-enhanced.dark {
  color-scheme: dark;
  --sr-paper: #03070d;
  --sr-paper-2: #111827;
  --sr-surface: rgba(17,24,39,.84);
  --sr-surface-solid: #141c2b;
  --sr-ink: #f5f7fb;
  --sr-ink-2: #d6deeb;
  --sr-muted: #a5b1c3;
  --sr-line: rgba(221,231,246,.11);
  --sr-line-strong: rgba(221,231,246,.2);
  --sr-accent: #32d8a2;
  --sr-accent-2: #6be5bd;
  --sr-accent-soft: #123d31;
  --sr-accent-rgb: 50,216,162;
  --sr-deep: #03070e;
  --sr-deep-2: #10233f;
  --sr-cobalt: #2997ff;
  --sr-metal: #718bb2;
  --sr-metal-soft: #1e2e45;
  --sr-on-accent: #001b12;
  --sr-shadow: 0 34px 100px rgba(0,0,0,.38), inset 0 1px rgba(255,255,255,.07);
  background-image:
    radial-gradient(circle at 1% 7%, rgba(var(--sr-accent-rgb),.1), transparent 27rem),
    radial-gradient(circle at 99% 25%, rgba(41,151,255,.1), transparent 31rem),
    linear-gradient(180deg, var(--sr-paper), color-mix(in srgb,var(--sr-paper) 86%,#071222));
}

html[data-theme="dark"] .sr-enhanced.uc-jee,
.sr-enhanced.uc-jee.dark {
  --sr-accent: #ff7e49;
  --sr-accent-2: #ff9d76;
  --sr-accent-soft: #4a281d;
  --sr-accent-rgb: 255,126,73;
  --sr-on-accent: #2b0d03;
}

.sr-enhanced .uc-main { width: min(100% - 48px, 1320px); padding: 18px 0 64px; }
.sr-enhanced .uc-breadcrumb { color: var(--sr-muted); font-size: 12px; }
.sr-enhanced .uc-breadcrumb a { color: var(--sr-ink-2); }
.sr-enhanced .uc-intro {
  position: relative;
  min-height: 244px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding: 34px clamp(8px,5vw,68px);
}
.sr-enhanced .uc-intro::before {
  content: "";
  position: absolute;
  right: clamp(10px,7vw,96px);
  top: 50%;
  width: clamp(118px,15vw,190px);
  aspect-ratio: 1;
  border: 1px solid rgba(255,255,255,.9);
  border-radius: 42% 58% 52% 48% / 52% 40% 60% 48%;
  background:
    radial-gradient(circle at 35% 30%, rgba(255,255,255,.9), transparent 32%),
    linear-gradient(145deg, rgba(255,255,255,.67), color-mix(in srgb,var(--sr-metal-soft) 43%,transparent));
  box-shadow: 0 28px 78px rgba(30,43,58,.13), inset 0 1px #fff;
  backdrop-filter: blur(22px) saturate(1.25);
  transform: translateY(-50%) rotate(7deg);
}
html[data-theme="dark"] .sr-enhanced .uc-intro::before,
.sr-enhanced.dark .uc-intro::before {
  border-color: rgba(255,255,255,.12);
  background: linear-gradient(145deg, rgba(30,45,68,.72), rgba(9,17,30,.56));
  box-shadow: 0 28px 78px rgba(0,0,0,.36), inset 0 1px rgba(255,255,255,.1);
}
.sr-enhanced .uc-intro::after {
  content: "";
  position: absolute;
  right: clamp(48px,10.5vw,144px);
  top: 50%;
  width: clamp(50px,6.5vw,80px);
  aspect-ratio: 1;
  border: 2px solid var(--sr-accent);
  border-radius: 50%;
  box-shadow: 0 0 0 15px color-mix(in srgb,var(--sr-accent) 12%,transparent), 0 0 0 30px color-mix(in srgb,var(--sr-cobalt) 7%,transparent);
  transform: translateY(-50%);
}
.sr-enhanced .uc-intro h1 {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--sr-deep);
  font: 800 clamp(50px,7vw,88px)/.94 "Segoe UI Variable Display","Segoe UI",sans-serif;
  letter-spacing: -.065em;
}
html[data-theme="dark"] .sr-enhanced .uc-intro h1,
.sr-enhanced.dark .uc-intro h1 { color: var(--sr-ink); }
.sr-enhanced .uc-intro p {
  position: relative;
  z-index: 1;
  max-width: 590px;
  margin-top: 18px;
  color: var(--sr-ink-2);
  font-size: 17px;
}
.sr-enhanced .uc-tabs {
  position: relative;
  z-index: 2;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 22px;
  padding: 6px;
  display: flex !important;
  gap: 4px;
  border: 1px solid rgba(255,255,255,.92);
  border-radius: 18px;
  background: rgba(255,255,255,.64);
  box-shadow: 0 18px 50px rgba(25,39,60,.1), inset 0 1px #fff;
  backdrop-filter: blur(22px) saturate(1.35);
  overflow-x: auto;
  scrollbar-width: none;
}
.sr-enhanced .uc-tabs::-webkit-scrollbar { display: none; }
.sr-enhanced .uc-tabs a {
  min-width: max-content;
  min-height: 44px;
  display: grid;
  place-items: center;
  padding: 0 19px;
  border: 0;
  border-radius: 13px;
  color: var(--sr-muted);
  font-size: 14px;
  font-weight: 750;
}
.sr-enhanced .uc-tabs a.is-active {
  color: var(--sr-on-accent);
  background: linear-gradient(145deg,var(--sr-accent),color-mix(in srgb,var(--sr-accent) 62%,var(--sr-cobalt)));
  box-shadow: 0 10px 26px rgba(var(--sr-accent-rgb),.22), inset 0 1px rgba(255,255,255,.24);
}
html[data-theme="dark"] .sr-enhanced .uc-tabs,
.sr-enhanced.dark .uc-tabs { border-color: rgba(255,255,255,.13); background: rgba(17,24,39,.72); box-shadow: 0 18px 50px rgba(0,0,0,.3), inset 0 1px rgba(255,255,255,.08); }
.sr-source[hidden] { display: none !important; }

.sr-shell {
  position: relative;
  margin-bottom: 32px;
  padding: clamp(22px,4vw,48px);
  border: 1px solid rgba(255,255,255,.91);
  border-radius: 36px;
  background:
    radial-gradient(circle at 8% 4%, rgba(var(--sr-accent-rgb),.09), transparent 28%),
    radial-gradient(circle at 92% 8%, color-mix(in srgb,var(--sr-cobalt) 10%,transparent), transparent 30%),
    linear-gradient(155deg,rgba(255,255,255,.89),rgba(236,241,248,.72));
  box-shadow: var(--sr-shadow);
  backdrop-filter: blur(20px) saturate(1.18);
  color: var(--sr-ink);
}
html[data-theme="dark"] .sr-shell,
.sr-enhanced.dark .sr-shell {
  border-color: rgba(255,255,255,.1);
  background:
    radial-gradient(circle at 8% 4%, rgba(var(--sr-accent-rgb),.08), transparent 28%),
    radial-gradient(circle at 92% 8%, color-mix(in srgb,var(--sr-cobalt) 10%,transparent), transparent 30%),
    linear-gradient(155deg,rgba(20,28,43,.94),rgba(3,7,13,.82));
}
.sr-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; padding: 0 4px 28px; }
.sr-head > div:first-child { max-width: 720px; }
.sr-head > div:first-child > span { color: var(--sr-accent); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .13em; }
.sr-head h2 { margin: 7px 0 8px !important; color: var(--sr-ink); font: 800 clamp(31px,4vw,48px)/1 "Segoe UI Variable Display","Segoe UI",sans-serif !important; letter-spacing: -.045em !important; }
.sr-head p { margin: 0; color: var(--sr-muted); font-size: 16px; }
.sr-summary { display: grid; grid-template-columns: auto auto auto auto; align-items: baseline; gap: 6px 9px; white-space: nowrap; }
.sr-summary strong, .sr-summary b { color: var(--sr-accent); font: 800 25px/1 "Segoe UI Variable Display","Segoe UI",sans-serif; }
.sr-summary span { color: var(--sr-muted); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }

.sr-toolbar { margin-bottom: 20px; padding: 10px; display: flex; gap: 10px; border: 1px solid var(--sr-line); border-radius: 20px; background: rgba(255,255,255,.72); box-shadow: 0 12px 36px rgba(30,43,58,.06), inset 0 1px #fff; backdrop-filter: blur(22px) saturate(1.24); }
html[data-theme="dark"] .sr-toolbar,
.sr-enhanced.dark .sr-toolbar { border-color: rgba(255,255,255,.1); background: rgba(17,24,39,.68); box-shadow: 0 14px 38px rgba(0,0,0,.22), inset 0 1px rgba(255,255,255,.07); }
.sr-search { flex: 1; min-width: 230px; height: 48px; padding: 0 12px; display: flex; align-items: center; gap: 10px; border: 1px solid var(--sr-line); border-radius: 14px; background: rgba(255,255,255,.74); }
html[data-theme="dark"] .sr-search,
.sr-enhanced.dark .sr-search { background: rgba(255,255,255,.055); }
.sr-search > .ti { color: var(--sr-accent); font-size: 19px; }
.sr-search input { width: 100%; min-width: 0; border: 0; outline: 0; padding: 0; color: var(--sr-ink); background: transparent; }
.sr-search input::placeholder { color: var(--sr-muted); opacity: 1; }
.sr-search kbd { min-width: 25px; height: 25px; display: grid; place-items: center; border: 1px solid var(--sr-line); border-bottom-color: var(--sr-line-strong); border-radius: 7px; color: var(--sr-muted); background: var(--sr-paper-2); font: 700 12px/1 monospace; }
.sr-classes { display: flex; gap: 5px; }
.sr-classes button { min-height: 48px; padding: 0 15px; border: 0; border-radius: 13px; color: var(--sr-muted); background: transparent; font-size: 13px; font-weight: 750; cursor: pointer; white-space: nowrap; }
.sr-classes button:hover { color: var(--sr-ink); background: var(--sr-paper-2); }
.sr-classes button.is-active { color: var(--sr-accent); background: color-mix(in srgb,var(--sr-accent-soft) 88%,#fff); box-shadow: inset 0 0 0 1px rgba(var(--sr-accent-rgb),.08); }
html[data-theme="dark"] .sr-classes button.is-active,
.sr-enhanced.dark .sr-classes button.is-active { background: var(--sr-accent-soft); }

.sr-subject-area {
  margin-bottom: 34px;
  padding: 10px;
  display: grid;
  grid-template-columns: auto minmax(0,1fr);
  gap: 10px 16px;
  border: 1px solid color-mix(in srgb,var(--sr-metal) 26%,transparent);
  border-radius: 24px;
  background: linear-gradient(128deg,var(--sr-deep),var(--sr-deep-2));
  box-shadow: 0 24px 64px color-mix(in srgb,var(--sr-deep) 22%,transparent), inset 0 1px rgba(255,255,255,.09);
}
.sr-section-label { align-self: center; margin: 0 0 0 10px; color: #aab8ca; font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .14em; }
.sr-subject-picker { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; }
.sr-subject { width: 100%; min-height: 72px; padding: 10px 11px; display: grid; grid-template-columns: 44px minmax(0,1fr) 18px; align-items: center; gap: 10px; border: 1px solid transparent; border-radius: 17px; color: #fff; background: transparent; text-align: left; cursor: pointer; transition: transform .25s var(--sr-ease),background .25s,border-color .25s; }
.sr-subject:hover { transform: translateY(-2px); background: rgba(255,255,255,.065); }
.sr-subject.is-active { border-color: color-mix(in srgb,var(--sr-metal) 34%,transparent); background: linear-gradient(132deg,rgba(var(--sr-accent-rgb),.7),color-mix(in srgb,var(--sr-cobalt) 56%,transparent)); box-shadow: inset 0 1px rgba(255,255,255,.16),0 12px 34px rgba(0,0,0,.14); }
.sr-subject-icon { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid color-mix(in srgb,var(--sr-metal) 38%,transparent); border-radius: 14px; color: #fff; background: rgba(255,255,255,.075); box-shadow: inset 0 1px rgba(255,255,255,.12); font-size: 23px; }
.sr-subject strong, .sr-subject small { display: block; }
.sr-subject strong { margin-bottom: 4px; font-size: 14px; font-weight: 750; }
.sr-subject small { color: #aebecf; font-size: 11px; }
.sr-subject > .ti { display: none; }
.sr-subject-note { grid-column: 1 / -1; margin: 0; padding: 12px 15px; display: flex; align-items: center; gap: 10px; border: 1px solid rgba(255,255,255,.055); border-radius: 15px; color: #fff; background: rgba(255,255,255,.035); }
.sr-subject-note > .ti { color: #78a9dc; font-size: 18px; }
.sr-subject-note p { display: flex; align-items: center; gap: 8px; margin: 0; }
.sr-subject-note strong { font-size: 11px; }
.sr-subject-note span { color: #aebdca; font-size: 11px; }

.sr-unit-area { min-width: 0; }
.sr-unit-heading { min-height: 66px; margin-left: 86px; padding: 0 4px 22px; display: flex; align-items: end; justify-content: space-between; gap: 20px; }
.sr-subject-kicker { display: flex; align-items: center; gap: 7px; margin-bottom: 4px; color: var(--sr-accent); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .12em; }
.sr-subject-kicker .ti { font-size: 16px; }
.sr-unit-heading h3 { margin: 0; color: var(--sr-ink); font: 800 23px/1.15 "Segoe UI Variable Display","Segoe UI",sans-serif; letter-spacing: -.03em; }
.sr-unit-heading p { margin: 0; color: var(--sr-muted); font-size: 12px; }
.sr-unit-list { position: relative; display: grid; gap: 18px; padding-left: 86px; }
.sr-unit-list::before { content: ""; position: absolute; left: 34px; top: 36px; bottom: 36px; width: 2px; background: linear-gradient(to bottom,transparent,var(--sr-metal) 12%,rgba(var(--sr-accent-rgb),.56) 48%,color-mix(in srgb,var(--sr-cobalt) 46%,transparent) 86%,transparent); box-shadow: 0 0 18px color-mix(in srgb,var(--sr-metal) 22%,transparent); }
.sr-unit-card { position: relative; overflow: visible; border: 1px solid rgba(90,112,142,.17); border-radius: 24px; background: rgba(255,255,255,.82); box-shadow: 0 12px 34px rgba(28,42,62,.055),inset 0 1px rgba(255,255,255,.88); backdrop-filter: blur(18px) saturate(1.1); transition: border-color .25s,box-shadow .25s,transform .25s var(--sr-ease); scroll-margin-top: 96px; }
html[data-theme="dark"] .sr-unit-card,
.sr-enhanced.dark .sr-unit-card { border-color: rgba(255,255,255,.1); background: rgba(20,28,43,.88); box-shadow: 0 16px 40px rgba(0,0,0,.24),inset 0 1px rgba(255,255,255,.06); }
.sr-unit-card::before { content: ""; position: absolute; left: -61px; top: 40px; width: 15px; height: 15px; border: 5px solid var(--sr-paper); border-radius: 50%; background: var(--sr-metal); box-shadow: 0 0 0 1px color-mix(in srgb,var(--sr-metal) 44%,transparent),0 0 18px color-mix(in srgb,var(--sr-metal) 26%,transparent); }
.sr-unit-card:nth-child(even) { margin-left: 54px; }
.sr-unit-card:nth-child(even)::before { left: -115px; }
.sr-unit-card.is-open { border-color: rgba(var(--sr-accent-rgb),.34); background: var(--sr-surface-solid); box-shadow: 0 26px 72px rgba(29,42,62,.12),inset 0 1px #fff; transform: translateX(5px); }
html[data-theme="dark"] .sr-unit-card.is-open,
.sr-enhanced.dark .sr-unit-card.is-open { box-shadow: 0 26px 72px rgba(0,0,0,.35),inset 0 1px rgba(255,255,255,.07); }
.sr-unit-card.is-open::before { width: 19px; height: 19px; left: -65px; top: 38px; background: var(--sr-surface-solid); box-shadow: inset 0 0 0 5px var(--sr-accent),0 0 0 5px rgba(var(--sr-accent-rgb),.1),0 0 24px rgba(var(--sr-accent-rgb),.32); }
.sr-unit-card:nth-child(even).is-open::before { left: -119px; }
.sr-unit-card h4 { margin: 0; }
.sr-unit-trigger { width: 100%; min-height: 100px; padding: 14px 17px; display: grid; grid-template-columns: 51px minmax(0,1fr) 60px 24px; align-items: center; gap: 15px; border: 0; color: inherit; background: transparent; text-align: left; cursor: pointer; }
.sr-unit-trigger:hover { background: rgba(var(--sr-accent-rgb),.025); }
.sr-unit-index { width: 51px; height: 51px; display: grid; place-items: center; border-radius: 16px; color: var(--sr-on-accent); background: linear-gradient(145deg,var(--sr-accent),color-mix(in srgb,var(--sr-accent) 68%,var(--sr-cobalt))); box-shadow: 0 12px 28px rgba(var(--sr-accent-rgb),.18),inset 0 1px rgba(255,255,255,.28); font-size: 15px; font-weight: 800; letter-spacing: .04em; }
.sr-unit-copy { min-width: 0; }
.sr-unit-copy small, .sr-unit-copy strong, .sr-unit-copy em { display: block; }
.sr-unit-copy small { margin-bottom: 5px; color: var(--sr-accent); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.sr-unit-copy strong { color: var(--sr-ink); font: 750 17px/1.2 "Segoe UI Variable Display","Segoe UI",sans-serif; letter-spacing: -.02em; }
.sr-unit-copy em { margin-top: 6px; overflow: hidden; color: var(--sr-muted); font-size: 12px; font-style: normal; text-overflow: ellipsis; white-space: nowrap; }
.sr-unit-count { text-align: center; }
.sr-unit-count b, .sr-unit-count span { display: block; }
.sr-unit-count b { color: var(--sr-ink); font-size: 18px; font-weight: 800; }
.sr-unit-count span { color: var(--sr-muted); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; }
.sr-unit-trigger > .ti { width: 24px; height: 24px; display: grid; place-items: center; border-radius: 8px; color: var(--sr-muted); background: var(--sr-paper-2); transition: transform .3s var(--sr-ease),color .2s,background .2s; }
.sr-unit-card.is-open .sr-unit-trigger > .ti { color: var(--sr-on-accent); background: var(--sr-accent); transform: rotate(180deg); }
.sr-unit-panel { display: grid; grid-template-rows: 0fr; visibility: hidden; transition: grid-template-rows .42s var(--sr-ease),visibility .42s; }
.sr-unit-card.is-open .sr-unit-panel { grid-template-rows: 1fr; visibility: visible; }
.sr-panel-inner { min-height: 0; overflow: hidden; display: grid; grid-template-columns: minmax(220px,.75fr) minmax(0,1.8fr); }
.sr-unit-card.is-open .sr-panel-inner { border-top: 1px solid rgba(var(--sr-accent-rgb),.18); }
.sr-chapters { padding: 22px; background: color-mix(in srgb,var(--sr-paper-2) 84%,var(--sr-metal-soft)); }
.sr-chapters > span, .sr-mocks-head > span { display: block; margin-bottom: 12px; color: var(--sr-muted); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.sr-chapter-group + .sr-chapter-group { margin-top: 16px; }
.sr-chapter-group h6 { margin: 0 0 8px; color: var(--sr-accent); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.sr-chapter-group ol { margin: 0; padding: 0; list-style: none; counter-reset: chapters; display: grid; gap: 9px; }
.sr-chapter-group li { position: relative; padding-left: 27px; color: var(--sr-ink-2); font-size: 12px; line-height: 1.45; }
.sr-chapter-group li::before { counter-increment: chapters; content: counter(chapters); position: absolute; left: 0; top: 0; width: 19px; height: 19px; display: grid; place-items: center; border: 1px solid var(--sr-line); border-radius: 6px; color: var(--sr-accent); background: var(--sr-surface-solid); font-size: 10px; font-weight: 800; }
.sr-mocks { min-width: 0; padding: 22px; background: var(--sr-surface-solid); }
.sr-mocks-head { display: flex; justify-content: space-between; align-items: start; }
.sr-mocks-head b { padding: 5px 8px; border-radius: 7px; color: var(--sr-accent); background: color-mix(in srgb,var(--sr-accent-soft) 86%,#fff); font-size: 11px; }
html[data-theme="dark"] .sr-mocks-head b,
.sr-enhanced.dark .sr-mocks-head b { background: var(--sr-accent-soft); }
.sr-mock-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; }
.sr-mock { min-width: 0; min-height: 80px; padding: 11px; display: grid; grid-template-columns: 42px minmax(0,1fr) auto; align-items: center; gap: 10px; border: 1px solid rgba(90,112,142,.15); border-radius: 15px; color: var(--sr-ink); background: color-mix(in srgb,var(--sr-paper) 82%,#fff); text-decoration: none; transition: transform .24s var(--sr-ease),border-color .24s,box-shadow .24s; }
html[data-theme="dark"] .sr-mock,
.sr-enhanced.dark .sr-mock { border-color: rgba(255,255,255,.1); background: color-mix(in srgb,var(--sr-paper-2) 90%,#000); }
.sr-mock:hover { transform: translateY(-2px); border-color: rgba(var(--sr-accent-rgb),.3); box-shadow: 0 12px 26px rgba(16,34,54,.09); }
.sr-mock-number { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 12px; color: var(--sr-accent); background: color-mix(in srgb,var(--sr-accent-soft) 86%,#fff); font-size: 12px; font-weight: 800; }
html[data-theme="dark"] .sr-mock-number,
.sr-enhanced.dark .sr-mock-number { background: var(--sr-accent-soft); }
.sr-mock-copy { min-width: 0; }
.sr-mock-copy small, .sr-mock-copy strong, .sr-mock-copy em { display: block; }
.sr-mock-copy small { margin-bottom: 3px; color: var(--sr-muted); font-size: 10px; text-transform: uppercase; letter-spacing: .05em; }
.sr-mock-copy strong { overflow: hidden; color: var(--sr-ink); font-size: 13px; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }
.sr-mock-copy em { margin-top: 4px; color: var(--sr-muted); font-size: 11px; font-style: normal; }
.sr-mock-action { min-width: 58px; min-height: 37px; display: flex; align-items: center; justify-content: center; gap: 3px; border-radius: 10px; color: var(--sr-accent); background: color-mix(in srgb,var(--sr-accent-soft) 86%,#fff); font-size: 11px; font-weight: 800; }
html[data-theme="dark"] .sr-mock-action,
.sr-enhanced.dark .sr-mock-action { background: var(--sr-accent-soft); }
.sr-empty { padding: 70px 20px; border: 1px dashed var(--sr-line-strong); border-radius: 20px; color: var(--sr-muted); text-align: center; }
.sr-empty > .ti { color: var(--sr-accent); font-size: 36px; }
.sr-empty h3 { margin: 12px 0 4px; color: var(--sr-ink); font-size: 20px; }
.sr-empty p { margin: 0 0 14px; }
.sr-empty button { min-height: 40px; padding: 0 15px; border: 0; border-radius: 10px; color: var(--sr-on-accent); background: var(--sr-accent); font-weight: 750; cursor: pointer; }

@media (max-width: 900px) {
  .sr-enhanced .uc-main { width: min(100% - 24px,860px); }
  .sr-subject-area { grid-template-columns: 1fr; }
  .sr-section-label { margin: 5px 8px 0; }
  .sr-subject-note { grid-column: auto; }
  .sr-panel-inner { grid-template-columns: 1fr; }
  .sr-chapters { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
  .sr-chapters > span { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .sr-enhanced .uc-main { width: calc(100% - 20px); padding-top: 10px; }
  .sr-enhanced .uc-breadcrumb { margin-inline: 4px; }
  .sr-enhanced .uc-intro { min-height: 210px; padding: 34px 8px 26px; }
  .sr-enhanced .uc-intro::before, .sr-enhanced .uc-intro::after { display: none; }
  .sr-enhanced .uc-intro h1 { font-size: clamp(48px,16vw,68px); }
  .sr-enhanced .uc-intro p { max-width: 330px; margin-top: 16px; font-size: 15px; line-height: 1.45; }
  .sr-enhanced .uc-tabs { width: 100%; justify-content: flex-start; margin-bottom: 13px; border-radius: 16px; }
  .sr-enhanced .uc-tabs a { min-height: 42px; padding: 0 14px; font-size: 12px; }
  .sr-shell { margin-bottom: 50px; padding: 15px; border-radius: 25px; }
  .sr-head { display: block; padding: 5px 2px 20px; }
  .sr-head h2 { font-size: 29px !important; }
  .sr-head p { max-width: 310px; font-size: 13px; line-height: 1.5; }
  .sr-summary { width: 100%; margin-top: 18px; grid-template-columns: auto 1fr auto 1fr; gap: 5px 8px; }
  .sr-summary strong, .sr-summary b { font-size: 21px; }
  .sr-summary span { font-size: 10px; }
  .sr-toolbar { padding: 7px; display: block; border-radius: 17px; }
  .sr-search { width: 100%; min-width: 0; height: 46px; }
  .sr-search kbd { display: none; }
  .sr-classes { margin-top: 7px; overflow-x: auto; scrollbar-width: none; }
  .sr-classes::-webkit-scrollbar { display: none; }
  .sr-classes button { min-height: 44px; flex: 0 0 auto; padding: 0 13px; }
  .sr-subject-area { display: block; margin-bottom: 18px; padding: 9px; border-radius: 19px; }
  .sr-section-label { margin: 4px 5px 8px; }
  .sr-subject-picker { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 6px; }
  .sr-subject { min-width: 0; min-height: 76px; padding: 8px 3px; display: flex; flex-direction: column; justify-content: center; gap: 6px; text-align: center; }
  .sr-subject:hover { transform: none; }
  .sr-subject-icon { width: 38px; height: 38px; border-radius: 12px; font-size: 20px; }
  .sr-subject strong { margin: 0; font-size: 11px; }
  .sr-subject small, .sr-subject-note { display: none; }
  .sr-unit-heading { min-height: 59px; margin-left: 0; padding: 0 3px 12px; }
  .sr-unit-heading h3 { font-size: 19px; }
  .sr-unit-heading p { max-width: 98px; font-size: 10px; text-align: right; }
  .sr-unit-list { gap: 11px; padding-left: 31px; }
  .sr-unit-list::before { left: 9px; top: 28px; bottom: 28px; }
  .sr-unit-card, .sr-unit-card:nth-child(even) { margin-left: 0; border-radius: 17px; scroll-margin-top: 82px; }
  .sr-unit-card::before, .sr-unit-card:nth-child(even)::before { left: -29px; top: 34px; width: 12px; height: 12px; border-width: 4px; }
  .sr-unit-card.is-open, .sr-unit-card:nth-child(even).is-open { transform: none; }
  .sr-unit-card.is-open::before, .sr-unit-card:nth-child(even).is-open::before { left: -31px; top: 33px; width: 16px; height: 16px; }
  .sr-unit-trigger { min-height: 86px; padding: 11px; grid-template-columns: 43px minmax(0,1fr) 39px 22px; gap: 9px; }
  .sr-unit-index { width: 43px; height: 43px; border-radius: 13px; font-size: 12px; }
  .sr-unit-copy small { font-size: 9px; }
  .sr-unit-copy strong { font-size: 14px; }
  .sr-unit-copy em { max-width: 44vw; font-size: 10px; }
  .sr-unit-count b { font-size: 14px; }
  .sr-unit-count span { font-size: 9px; }
  .sr-chapters { display: block; }
  .sr-chapters, .sr-mocks { padding: 15px; }
  .sr-mock-grid { display: flex; gap: 9px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 6px; scrollbar-width: thin; }
  .sr-mock { flex: 0 0 min(88%,330px); min-height: 78px; scroll-snap-align: start; grid-template-columns: 38px minmax(0,1fr) 44px; }
  .sr-mock-number { width: 38px; height: 38px; }
  .sr-mock-action { min-width: 42px; font-size: 0; }
  .sr-mock-action .ti { font-size: 15px; }
}

@media (max-width: 370px) {
  .sr-shell { padding: 11px; }
  .sr-subject { padding-inline: 2px; }
  .sr-unit-trigger { grid-template-columns: 40px minmax(0,1fr) 34px 20px; gap: 7px; padding-inline: 8px; }
  .sr-unit-index { width: 40px; height: 40px; }
  .sr-unit-copy em { max-width: 40vw; }
}

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

/* Identity Rail · compact exam navigation approved 2026-09-20. */
.sr-enhanced .sr-identity-rail {
  position: relative;
  min-height: 93px;
  margin: 20px 0 16px;
  padding: 13px 15px;
  display: grid;
  grid-template-columns: minmax(280px,1fr) auto auto;
  grid-template-areas: "identity stats tabs";
  align-items: center;
  gap: 18px;
  border: 1px solid rgba(255,255,255,.88);
  border-radius: 24px;
  background:
    radial-gradient(circle at 5% 0%, rgba(var(--sr-accent-rgb),.12), transparent 37%),
    color-mix(in srgb,var(--sr-surface) 88%,transparent);
  box-shadow: 0 16px 42px rgba(18,35,58,.08), inset 0 1px rgba(255,255,255,.9);
  backdrop-filter: blur(28px) saturate(1.35);
}

html[data-theme="dark"] .sr-enhanced .sr-identity-rail,
.sr-enhanced.dark .sr-identity-rail {
  border-color: rgba(255,255,255,.11);
  box-shadow: 0 18px 46px rgba(0,0,0,.28), inset 0 1px rgba(255,255,255,.07);
}

.sr-enhanced .sr-identity-rail .uc-intro {
  grid-area: identity;
  min-height: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 58px minmax(145px,1fr);
  align-items: center;
  justify-content: initial;
  gap: 14px;
  overflow: visible;
}

.sr-enhanced .sr-identity-rail .uc-intro::before,
.sr-enhanced .sr-identity-rail .uc-intro::after { display: none; }

.sr-exam-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.88);
  border-radius: 18px;
  color: var(--sr-accent);
  background: color-mix(in srgb,var(--sr-surface-solid) 84%,var(--sr-accent-soft));
  box-shadow: 0 12px 30px rgba(var(--sr-accent-rgb),.12), inset 0 1px rgba(255,255,255,.82);
  font-size: 30px;
}

html[data-theme="dark"] .sr-exam-mark,
.sr-enhanced.dark .sr-exam-mark {
  border-color: rgba(255,255,255,.12);
  background: color-mix(in srgb,var(--sr-surface-solid) 82%,var(--sr-accent-soft));
  box-shadow: 0 12px 30px rgba(0,0,0,.26), inset 0 1px rgba(255,255,255,.08);
}

.sr-rail-copy { min-width: 0; display: block; }
.sr-enhanced .sr-rail-copy .uc-breadcrumb {
  margin: 0 0 5px;
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--sr-accent);
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .14em;
}
.sr-enhanced .sr-rail-copy .uc-breadcrumb a { color: var(--sr-accent); }
.sr-enhanced .sr-rail-copy h1 {
  margin: 0;
  color: var(--sr-ink);
  font: 800 27px/1 "Segoe UI Variable Display","Segoe UI",sans-serif;
  letter-spacing: -.045em;
}
.sr-enhanced .sr-rail-copy p {
  max-width: none;
  margin: 7px 0 0;
  overflow: hidden;
  color: var(--sr-muted);
  font-size: 11px;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sr-rail-summary {
  grid-area: stats;
  display: flex;
  align-items: center;
  gap: 13px;
  margin-left: auto;
}
.sr-rail-summary > span { display: grid; gap: 2px; }
.sr-rail-summary b { color: var(--sr-ink); font: 800 18px/1 "Segoe UI Variable Display","Segoe UI",sans-serif; }
.sr-rail-summary small { color: var(--sr-muted); font-size: 9px; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.sr-rail-summary > i { width: 1px; height: 29px; background: var(--sr-line); }

.sr-enhanced .sr-identity-rail .uc-tabs {
  grid-area: tabs;
  width: auto;
  margin: 0;
  padding: 4px;
  gap: 3px;
  border-color: var(--sr-line);
  border-radius: 15px;
  background: rgba(255,255,255,.45);
  box-shadow: none;
}
html[data-theme="dark"] .sr-enhanced .sr-identity-rail .uc-tabs,
.sr-enhanced.dark .sr-identity-rail .uc-tabs { background: rgba(255,255,255,.045); }
.sr-enhanced .sr-identity-rail .uc-tabs a {
  min-height: 38px;
  padding: 0 14px;
  border-radius: 11px;
  font-size: 12px;
}

.sr-enhanced #unit-wise .sr-head { display: none; }
.sr-enhanced #unit-wise .sr-shell { padding-top: clamp(18px,2vw,28px); }

@media (max-width: 900px) {
  .sr-enhanced .sr-identity-rail {
    grid-template-columns: minmax(0,1fr) auto;
    grid-template-areas: "identity stats" "tabs tabs";
    gap: 10px;
  }
  .sr-enhanced .sr-identity-rail .uc-tabs { width: 100%; justify-content: center; }
}

@media (max-width: 720px) {
  .sr-enhanced .sr-identity-rail {
    min-height: 141px;
    margin: 15px 0 12px;
    padding: 12px 10px 9px;
    grid-template-columns: minmax(0,1fr) auto;
    grid-template-areas: "identity stats" "tabs tabs";
    gap: 9px;
    border-radius: 21px;
  }
  .sr-enhanced .sr-identity-rail .uc-intro {
    min-height: 0;
    padding: 0;
    grid-template-columns: 50px minmax(0,1fr);
    gap: 10px;
  }
  .sr-exam-mark { width: 50px; height: 50px; border-radius: 15px; font-size: 26px; }
  .sr-enhanced .sr-rail-copy .uc-breadcrumb { margin: 0 0 4px; font-size: 8px; }
  .sr-enhanced .sr-rail-copy h1 { font-size: 22px; }
  .sr-enhanced .sr-rail-copy p { margin-top: 5px; font-size: 10px; }
  .sr-rail-summary { gap: 7px; }
  .sr-rail-summary b { font-size: 14px; }
  .sr-rail-summary small { font-size: 7px; }
  .sr-rail-summary > i { height: 24px; }
  .sr-enhanced .sr-identity-rail .uc-tabs {
    width: 100%;
    margin: 0;
    justify-content: flex-start;
    border-radius: 14px;
  }
  .sr-enhanced .sr-identity-rail .uc-tabs a { min-height: 39px; padding: 0 13px; font-size: 11px; }
  .sr-enhanced #unit-wise .sr-shell { padding-top: 15px; }
}

@media (max-width: 390px) {
  .sr-rail-summary > i,
  .sr-rail-summary > span:last-child { display: none; }
  .sr-enhanced .sr-identity-rail .uc-tabs a { padding-inline: 11px; }
}