.learning-scratchpad { --pad-ink:#142d4b; --pad-blue:#2459b8; box-sizing:border-box; min-width:0; width:100%; max-width:42rem; padding:clamp(.9rem,2vw,1.35rem); margin:1.25rem 0; border:1px solid #b9cce2; border-top:5px solid #2459b8; border-radius:18px; background:#f7faff; color:var(--pad-ink); box-shadow:0 8px 24px #183d6710; }
.learning-scratchpad *, .learning-scratchpad *::before, .learning-scratchpad *::after { box-sizing:border-box; }
.scratchpad-heading { display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:.5rem 1rem; }
.learning-scratchpad .scratchpad-kicker { margin:0 0 .15rem; color:#435d7b; font-size:.75rem; font-weight:800; letter-spacing:.07em; text-transform:uppercase; }
.learning-scratchpad h2 { margin:0; color:var(--pad-ink); font-size:1.2rem; line-height:1.35; }
.scratchpad-badge { border-radius:999px; background:#e2f5ef; color:#175b4b; padding:.3rem .6rem; font-size:.72rem; font-weight:700; }
.learning-scratchpad .scratchpad-help { margin:.7rem 0; color:#425972; font-size:.9rem; line-height:1.55; }
.scratchpad-tools { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:.4rem; margin:.8rem 0; }
.scratchpad-tools button { min-width:0; min-height:44px; padding:.55rem .25rem; border:1px solid #71839c; border-radius:10px; background:#fff; color:var(--pad-ink); font:inherit; font-size:.88rem; line-height:1.3; font-weight:700; cursor:pointer; }
.scratchpad-tools button[aria-pressed="true"] { color:#fff; border-color:var(--pad-blue); background:var(--pad-blue); box-shadow:inset 0 -3px 0 #102e6e; }
.scratchpad-tools button:hover:not(:disabled) { outline:2px solid #2459b8; outline-offset:1px; }
.scratchpad-tools button:disabled { color:#67778b; background:#eef2f7; border-color:#c9d4e1; cursor:default; }
.scratchpad-surface { width:100%; aspect-ratio:3/2; overflow:hidden; border:1px solid #71839c; border-radius:12px; background-color:#fff; background-image:linear-gradient(#dbe8f5 1px,transparent 1px),linear-gradient(90deg,#dbe8f5 1px,transparent 1px); background-size:22px 22px; }
.scratchpad-surface canvas { display:block; width:100%; height:100%; touch-action:none; cursor:crosshair; }
.scratchpad-surface canvas[data-tool="eraser"] { cursor:cell; }
.scratchpad-notes-label { display:block; margin:.9rem 0 .35rem; color:var(--pad-ink); font-weight:700; }
.learning-scratchpad textarea { display:block; width:100%; min-width:0; min-height:100px; resize:vertical; padding:.75rem; border:1px solid #71839c; border-radius:10px; background:#fffdf6; color:var(--pad-ink); font:inherit; line-height:1.6; }
.learning-scratchpad textarea::placeholder { color:#5c6a7a; opacity:1; }
.learning-scratchpad .scratchpad-privacy { margin:.65rem 0 0; color:#526275; font-size:.8rem; line-height:1.5; }
.learning-scratchpad .scratchpad-status { margin:.4rem 0 0; min-height:1.5em; color:#244c7e; font-size:.84rem; line-height:1.5; }
.learning-scratchpad button:focus-visible,.learning-scratchpad textarea:focus-visible { outline:3px solid #183f80; outline-offset:3px; box-shadow:0 0 0 5px #fff; }
.attempt-workspace { display:grid; gap:1rem; min-width:0; align-items:start; }
.attempt-workspace > * { min-width:0; }
.attempt-workspace .learning-scratchpad { margin:0; }
.scratchpad-drawer-toggle[hidden],.scratchpad-drawer-close[hidden],.scratchpad-drawer-panel[hidden] { display:none!important; }
.scratchpad-drawer-toggle,.scratchpad-drawer-close { min-height:44px; padding:.65rem 1rem; border:2px solid #2459b8; border-radius:12px; font:inherit; font-weight:700; cursor:pointer; }
.scratchpad-drawer-toggle { position:fixed; z-index:9996; left:16px; bottom:calc(var(--pad-bottom-gap,16px) + env(safe-area-inset-bottom)); color:#fff; background:#2459b8; box-shadow:0 4px 14px #142d4b30; }
.scratchpad-drawer-close { color:#142d4b; background:#fff; }
.scratchpad-drawer-toggle:focus-visible,.scratchpad-drawer-close:focus-visible { outline:3px solid #183f80; outline-offset:3px; box-shadow:0 0 0 5px #fff; }
.scratchpad-drawer-ready .scratchpad-drawer-panel { position:fixed; z-index:9996; left:16px; bottom:calc(var(--pad-bottom-gap,16px) + 56px + env(safe-area-inset-bottom)); width:min(28rem,calc(100vw - 32px)); max-height:min(72dvh,calc(100dvh - var(--pad-bottom-gap,16px) - 80px)); overflow:auto; overscroll-behavior:contain; border-radius:18px; background:#f7faff; box-shadow:0 12px 32px #142d4b40; }
.scratchpad-drawer-ready .learning-scratchpad { margin:0; max-width:none; }
.scratchpad-drawer-panel:focus-visible { outline:3px solid #183f80; outline-offset:3px; }
.scratchpad-drawer-ready .scratchpad-heading { padding:.25rem 0; }
@media(max-width:600px) { .scratchpad-drawer-ready .scratchpad-drawer-panel { max-height:min(52dvh,calc(100dvh - var(--pad-bottom-gap,16px) - 80px)); } }
@media(min-width:1200px) { .attempt-workspace { grid-template-columns:minmax(0,1.55fr) minmax(280px,.85fr); } }
@media(forced-colors:active) { .scratchpad-tools button[aria-pressed="true"] { outline:3px solid Highlight; } .scratchpad-surface { border-color:CanvasText; } }
@media print { .learning-scratchpad,.scratchpad-drawer { display:none!important; } .attempt-workspace { display:block; } }