/* Course-wide tools: AQA practical lab + exam marking app. */
.course-tools-block{margin:26px 0 4px}.course-tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.course-tool-card{appearance:none;width:100%;min-height:154px;border:1px solid var(--line-soft);border-radius:14px;background:#0d1724;color:var(--text);padding:16px;text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:10px;transition:border-color .14s ease,background .14s ease,transform .14s ease}.course-tool-card:hover,.course-tool-card:focus-visible{background:#111e2d;border-color:rgba(102,217,208,.34);outline:none;transform:translateY(-1px)}.course-tool-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.course-tool-icon{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:rgba(102,217,208,.08);border:1px solid rgba(102,217,208,.15);font-size:1.05rem}.course-tool-status{font-size:.59rem;font-weight:850;text-transform:uppercase;letter-spacing:.07em;color:#87a0b7}.course-tool-card h3{font-size:1rem;margin:0}.course-tool-card p{margin:0;color:var(--muted);font-size:.75rem;line-height:1.5;max-width:720px}.course-tool-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:3px;font-size:.66rem;color:#8095a8}.course-tool-footer strong{color:#9edbd6}.course-tool-card.marking .course-tool-icon{background:rgba(125,170,240,.08);border-color:rgba(125,170,240,.16)}

.tool-workspace{position:fixed;inset:0;z-index:75;background:#07111d;display:flex;flex-direction:column}.tool-workspace[hidden]{display:none!important}.tool-bar{height:52px;flex:0 0 52px;display:flex;align-items:center;gap:7px;padding:5px max(8px,calc((100vw - 1500px)/2));border-bottom:1px solid rgba(151,181,210,.12);background:rgba(8,17,29,.985);backdrop-filter:blur(14px)}.tool-back{appearance:none;border:1px solid rgba(102,217,208,.22);background:rgba(102,217,208,.07);color:#def8f5;border-radius:9px;min-height:36px;padding:8px 10px;font:800 .72rem/1 system-ui,sans-serif;cursor:pointer;white-space:nowrap}.tool-back:hover{background:rgba(102,217,208,.12)}.tool-identity{min-width:0;display:grid;gap:1px;margin-right:auto}.tool-identity span{font-size:.57rem;text-transform:uppercase;letter-spacing:.08em;color:#71869a;font-weight:850}.tool-identity strong{font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tool-action{appearance:none;border:1px solid rgba(151,181,210,.14);border-radius:8px;background:transparent;color:#b9c9d8;min-height:35px;padding:7px 9px;font:800 .68rem/1 system-ui,sans-serif;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap}.tool-action:hover{background:rgba(255,255,255,.04);border-color:rgba(102,217,208,.28);color:#eef8f7}.tool-action.accent{color:#a8e7e1}.tool-frame-wrap{position:relative;flex:1;min-height:0;background:#fff}.tool-frame{display:block;width:100%;height:100%;border:0;background:#fff}.tool-external-note{position:absolute;left:50%;bottom:12px;transform:translateX(-50%);z-index:2;max-width:min(680px,calc(100% - 24px));padding:7px 10px;border:1px solid rgba(151,181,210,.16);border-radius:9px;background:rgba(8,17,29,.9);color:#9fb3c5;font-size:.65rem;line-height:1.4;text-align:center;box-shadow:0 8px 28px rgba(0,0,0,.26);pointer-events:none}.tool-mode{overflow:hidden}.tool-mode .topbar,.tool-mode .course-jumpbar,.tool-mode .course-home,.tool-mode .workspace-section,.tool-mode .mobile-study-dock{display:none!important}

@media(max-width:760px){.course-tools-block{margin-top:20px}.course-tool-grid{grid-template-columns:1fr;gap:8px}.course-tool-card{min-height:128px;padding:14px}.tool-bar{height:48px;flex-basis:48px;padding:4px 5px;gap:4px}.tool-back{width:36px;height:36px;min-height:36px;padding:0;font-size:0}.tool-back::after{content:'←';font-size:.86rem}.tool-identity span{display:none}.tool-identity strong{font-size:.75rem}.tool-action{width:36px;height:36px;min-height:36px;padding:0;font-size:0}.tool-action[data-icon]::after{content:attr(data-icon);font-size:.86rem}.tool-open-full{width:auto!important;padding:0 8px!important;font-size:.62rem!important}.tool-open-full::after{display:none}.tool-external-note{bottom:max(8px,env(safe-area-inset-bottom));font-size:.6rem}}
@media(max-width:420px){.course-tool-card p{font-size:.72rem}.course-tool-footer{font-size:.62rem}.tool-open-full{display:none!important}}
@media(prefers-reduced-motion:reduce){.course-tool-card{transition:none}.tool-bar{backdrop-filter:none}}