/* Scoped, dependency-free SION handwriting workspace. */
.sion-ink-dialog{--si-ink:#243747;--si-muted:#7b858e;--si-blue:#4263d5;--si-border:#e2e5e7;box-sizing:border-box;position:fixed;inset:0;width:100vw;width:100dvw;height:100vh;height:100dvh;max-width:none;max-height:none;padding:0;margin:0;border:0;border-radius:0;background:#f4f5f5;color:var(--si-ink);font-family:inherit;overscroll-behavior:contain;z-index:2147483000;overflow:hidden}
.sion-ink-dialog[open]{display:flex;flex-direction:column}
.sion-ink-dialog::backdrop{background:#172b3a88}
.sion-ink-dialog *,.sion-ink-dialog *::before,.sion-ink-dialog *::after{box-sizing:border-box}
.sion-ink-dialog [hidden]{display:none!important}
.sion-ink-dialog button,.sion-ink-dialog input,.sion-ink-dialog select{font:inherit}
.sion-ink-dialog button{cursor:pointer}
.sion-ink-dialog button:disabled{opacity:.35;cursor:default}
.sion-ink-dialog button:focus-visible,.sion-ink-dialog select:focus-visible,.sion-ink-dialog input:focus-visible,.sion-ink-viewport:focus-visible{outline:3px solid #a1b2ed;outline-offset:3px}
.sion-ink-header{min-height:91px;flex:none;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 30px;background:#fff;border-bottom:1px solid var(--si-border)}
.sion-ink-heading{display:grid;grid-template-columns:auto auto;column-gap:18px;align-items:baseline}
.sion-ink-eyebrow{grid-column:1/-1;font-size:8px;font-weight:700;letter-spacing:2px;color:#7c8b96;margin-bottom:7px}
.sion-ink-heading h2{font-size:21px;line-height:1.4;letter-spacing:-.6px;font-weight:600;margin:0}
.sion-ink-heading p{font-size:11px;margin:0;color:var(--si-muted)}
.sion-ink-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:36px;padding:8px 11px;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--si-ink);font-size:11px;font-weight:500;white-space:nowrap;line-height:1.4;user-select:none;-webkit-user-select:none;touch-action:manipulation}
.sion-ink-button svg{flex:none}
.sion-ink-button:hover:not(:disabled){background:#f0f2f4}
.sion-ink-button[aria-pressed=true]{background:#eaf0fa;border-color:#d3def2;color:#365dbc}
.sion-ink-close{border-color:var(--si-border);min-width:74px}
.sion-ink-toolbar{flex:none;display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:11px 25px;background:#fff;border-bottom:1px solid var(--si-border)}
.sion-ink-toolgroup{display:flex;align-items:center;gap:3px;padding-right:12px;border-right:1px solid var(--si-border)}
.sion-ink-colors{gap:6px}
.sion-ink-swatch{position:relative;min-height:30px;width:30px;min-width:30px;padding:5px;border-radius:50%;border:1px solid transparent;background:transparent!important}
.sion-ink-swatch::before{content:'';display:block;width:18px;height:18px;background:var(--swatch);border-radius:50%}
.sion-ink-swatch[aria-pressed=true]{border-color:var(--swatch)}
.sion-ink-swatch span,.sion-ink-icon-button span{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.sion-ink-icon-button{width:35px;padding:7px}
.sion-ink-select{display:flex;align-items:center;gap:8px;font-size:10px;color:var(--si-muted)}
.sion-ink-select select{color:var(--si-ink);border:1px solid var(--si-border);background:#fff;padding:6px;border-radius:5px;font-size:11px;height:34px;cursor:pointer}
.sion-ink-options{display:flex;gap:12px;align-items:center}
.sion-ink-toggle{display:flex;align-items:center;gap:5px;white-space:nowrap;font-size:10px;cursor:pointer;min-height:36px}
.sion-ink-toggle input{width:14px;height:14px;margin:0;accent-color:var(--si-blue)}
.sion-ink-zoom{margin-left:auto;padding-right:0;border-right:0;gap:1px}
.sion-ink-zoom-value{min-width:44px;font-size:11px;text-align:center;font-variant-numeric:tabular-nums;color:#6f7d87}
.sion-ink-zoom>.sion-ink-button:not(.sion-ink-icon-button){font-size:10px;padding:8px}
.sion-ink-notice{flex:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:9px 30px;font-size:10px;line-height:1.6;color:#6d7c86;border-bottom:1px solid #e3e7e9;background:#eef1f3}
.sion-ink-paper-size{font-size:9px;letter-spacing:.3px;color:#87939b;white-space:nowrap}
.sion-ink-viewport{flex:1;min-height:100px;overflow:auto;position:relative;padding:20px;overscroll-behavior:contain;touch-action:pan-x pan-y;background:#e9edef;scrollbar-color:#b6c1c8 #e9edef;scrollbar-width:thin}
.sion-ink-stage{position:relative;flex:none;margin:0 auto;box-shadow:0 3px 16px #233d4e12;isolation:isolate}
.sion-ink-paper{position:absolute;top:0;left:0;width:1600px;height:2000px;transform-origin:top left;background-color:#fff;background-image:radial-gradient(#cbd3d9 1px,transparent 1px);background-size:26px 26px;color:#243747;overflow:hidden}
.sion-ink-paper-meta{position:absolute;left:64px;right:64px;top:40px;display:flex;justify-content:space-between;gap:20px;font-size:12px;line-height:1.6;color:#7e8b95;letter-spacing:.7px;border-bottom:1px solid #e1e6e9;padding-bottom:19px;pointer-events:none}
.sion-ink-problem{position:absolute;left:64px;top:112px;object-fit:contain;object-position:top left;max-width:none!important;max-height:none!important;margin:0!important;padding:0!important;border:0!important;background:#fff;user-select:none;-webkit-user-select:none;pointer-events:none}
.sion-ink-solution-label{position:absolute;left:864px;top:115px;font-size:13px;letter-spacing:1px;color:#a4afb6;pointer-events:none}
.sion-ink-image-error{position:absolute;top:112px;left:64px;width:740px;padding:24px;background:#fff5eb;border:1px solid #e8ccb0;color:#9c6740;font-size:17px;line-height:1.8}
.sion-ink-canvas{position:absolute;inset:0;width:1600px!important;height:2000px!important;display:block;max-width:none!important;max-height:none!important;margin:0!important;padding:0!important;border:0!important;z-index:2;touch-action:none;cursor:crosshair;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.sion-ink-canvas[data-tool=eraser]{cursor:cell}
.sion-ink-footer{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 26px calc(12px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--si-border);flex:none}
.sion-ink-storage{min-width:0;flex:1}
.sion-ink-status{font-size:11px;line-height:1.65;margin:0;color:#577c68;overflow-wrap:anywhere}
.sion-ink-status::before{content:'';display:inline-block;width:5px;height:5px;border-radius:50%;margin-right:7px;background:currentColor;vertical-align:2px}
.sion-ink-status[data-state=pending]{color:#6f7c91}
.sion-ink-status[data-state=error]{color:#a05d38}
.sion-ink-local-note{font-size:9px;line-height:1.7;color:#8b959c;margin:2px 0 0}
.sion-ink-file-actions{display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.sion-ink-file-actions .sion-ink-button{font-size:10px;border-color:#e4e8eb}
@media(max-width:1100px){.sion-ink-toolbar{gap:8px;padding:9px 19px}.sion-ink-toolgroup{padding-right:8px}.sion-ink-options{gap:8px}.sion-ink-zoom{margin-left:0}.sion-ink-button{padding:7px 9px}.sion-ink-swatch{padding:5px}.sion-ink-heading h2{font-size:19px}}
@media(max-width:700px){.sion-ink-header{min-height:76px;padding:12px 16px}.sion-ink-heading{display:block}.sion-ink-eyebrow{display:block;font-size:7px;margin-bottom:5px}.sion-ink-heading h2{font-size:17px;line-height:1.4}.sion-ink-heading p{font-size:9px;margin-top:4px}.sion-ink-close{min-width:58px;font-size:10px}.sion-ink-toolbar{gap:6px 8px;padding:8px 12px}.sion-ink-button{min-height:36px;font-size:10px;padding:6px 8px}.sion-ink-toolgroup{padding-right:7px}.sion-ink-colors{gap:3px}.sion-ink-swatch{min-width:29px;width:29px;min-height:29px;padding:4px}.sion-ink-select>span{display:none}.sion-ink-select select{font-size:10px;max-width:61px}.sion-ink-icon-button{width:33px;padding:6px}.sion-ink-options{gap:10px}.sion-ink-toggle{font-size:10px}.sion-ink-zoom{margin-left:auto}.sion-ink-zoom-value{min-width:37px;font-size:10px}.sion-ink-zoom>.sion-ink-button:not(.sion-ink-icon-button){padding:7px 6px;font-size:9px}.sion-ink-notice{padding:7px 16px;font-size:9px}.sion-ink-paper-size{display:none}.sion-ink-viewport{padding:20px}.sion-ink-footer{align-items:flex-start;flex-direction:column;gap:7px;padding:9px 14px calc(9px + env(safe-area-inset-bottom))}.sion-ink-status{font-size:10px}.sion-ink-local-note{font-size:8px}.sion-ink-file-actions{gap:5px}.sion-ink-file-actions .sion-ink-button{min-height:31px;padding:6px 9px;font-size:9px}.sion-ink-file-actions svg{width:15px;height:15px}}
@media(max-height:540px) and (orientation:landscape){.sion-ink-header{min-height:54px;padding:8px 18px}.sion-ink-eyebrow,.sion-ink-heading p,.sion-ink-notice,.sion-ink-local-note{display:none}.sion-ink-toolbar{padding:5px 12px}.sion-ink-footer{padding:6px 12px;flex-direction:row;align-items:center}.sion-ink-viewport{min-height:80px}}
@media(prefers-reduced-motion:reduce){.sion-ink-dialog *{scroll-behavior:auto!important}}
.sion-ink-navigation{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 24px;border-bottom:1px solid #e5e8eb;background:#fff}.sion-ink-navigation button{min-height:44px;min-width:90px}.sion-ink-position{font-size:12px;color:#52616d;font-variant-numeric:tabular-nums;text-align:center}@media(max-width:600px){.sion-ink-navigation{padding:6px 12px;gap:6px}.sion-ink-navigation button{min-width:76px;padding:8px}.sion-ink-position{font-size:11px}}

/* Compact notes-style toolbar. Every primary control keeps a 44 px touch target. */
.sion-ink-header{min-height:72px;padding-top:10px;padding-bottom:10px}
.sion-ink-navigation{padding-top:2px;padding-bottom:2px}
.sion-ink-toolbar{position:relative;z-index:5;display:flex;flex-wrap:nowrap;justify-content:center;align-items:center;gap:8px;min-height:60px;padding:8px 16px;overflow:visible}
.sion-ink-toolbar>.sion-ink-toolgroup{flex:none;gap:4px;padding-right:8px;border-right:1px solid var(--si-border)}
.sion-ink-toolbar>.sion-ink-history-tools{padding-left:8px;border-left:1px solid var(--si-border);border-right:0;padding-right:0}
.sion-ink-toolbar>.sion-ink-button,.sion-ink-toolbar>.sion-ink-toolgroup>.sion-ink-button{position:relative;flex:none;width:44px;min-width:44px;height:44px;min-height:44px;padding:10px;border-radius:50%;border:1px solid transparent}
.sion-ink-toolbar>.sion-ink-toolgroup>.sion-ink-button svg,.sion-ink-toolbar>.sion-ink-button svg{width:22px;height:22px;stroke-width:1.75}
.sion-ink-toolbar .sion-ink-button[aria-pressed=true]{background:#e9edf4;border-color:transparent;box-shadow:none;color:#243747}
.sion-ink-toolbar>.sion-ink-button[aria-expanded=true]{background:#edf1f8;border-color:#d6dfef}
.sion-ink-color-trigger::before{content:'';width:23px;height:23px;border-radius:50%;background:var(--active-color,#243747);box-shadow:inset 0 0 0 1px #00000012}
.sion-ink-color-trigger::after{content:'';position:absolute;right:4px;bottom:7px;border-left:3px solid transparent;border-right:3px solid transparent;border-top:4px solid #7a858d}
.sion-ink-tool-panel{position:absolute;top:calc(100% + 6px);left:50%;transform:translateX(-50%);z-index:20;width:344px;max-width:calc(100% - 12px);max-height:calc(100dvh - 200px);overflow:auto;overscroll-behavior:contain;padding:12px;border:1px solid #e4e8ec;border-radius:20px;background:#fff;box-shadow:0 8px 32px #23374724;color:var(--si-ink)}
.sion-ink-panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 2px 8px}
.sion-ink-panel-heading h3{margin:0;font-size:13px;line-height:1.5;font-weight:650}
.sion-ink-panel-heading>.sion-ink-button{width:44px;height:44px;min-height:44px;border-radius:50%;background:#f4f5f7}
.sion-ink-colors{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:2px;padding:2px 0;border:0}
.sion-ink-colors>.sion-ink-swatch{position:relative;width:100%;min-width:44px;height:44px;min-height:44px;padding:8px;border-radius:50%;border:2px solid transparent}
.sion-ink-swatch::before{width:25px;height:25px;box-shadow:inset 0 0 0 1px #00000010}
.sion-ink-colors>.sion-ink-swatch[aria-pressed=true]{border-color:var(--swatch);box-shadow:none;background:transparent}
.sion-ink-colors>.sion-ink-swatch[aria-pressed=true]::after{content:'';position:absolute;inset:5px;border:2px solid #fff;border-radius:50%;pointer-events:none}
.sion-ink-panel-note{margin:10px 4px 3px;font-size:10px;line-height:1.7;color:#7b858e}
.sion-ink-settings-panel>.sion-ink-select{display:flex;justify-content:space-between;gap:16px;padding:4px 4px 12px;font-size:12px;border-bottom:1px solid #edf0f2}
.sion-ink-settings-panel .sion-ink-select>span{display:inline}
.sion-ink-settings-panel select{min-width:86px;max-width:none;height:44px;padding:8px 12px;font-size:12px;border-radius:10px}
.sion-ink-settings-panel>.sion-ink-options{display:flex;flex-direction:column;align-items:stretch;gap:0;padding:6px 4px;border-bottom:1px solid #edf0f2}
.sion-ink-settings-panel .sion-ink-toggle{justify-content:space-between;min-height:44px;font-size:12px}
.sion-ink-settings-panel .sion-ink-toggle input{width:20px;height:20px}
.sion-ink-settings-panel>.sion-ink-zoom{justify-content:center;margin:0;gap:24px;padding:8px 0;border:0}
.sion-ink-settings-panel .sion-ink-zoom>.sion-ink-button{width:44px;height:44px;min-height:44px;border-radius:50%;background:#f4f5f7}
.sion-ink-settings-panel .sion-ink-zoom-value{min-width:48px;font-size:12px}
.sion-ink-panel-actions{display:flex;gap:8px;padding:0 4px 8px}
.sion-ink-panel-actions>.sion-ink-button{flex:1;min-height:44px;border:1px solid #e3e8ed;border-radius:10px;font-size:11px}
.sion-ink-settings-panel>.sion-ink-clear-button{width:100%;min-height:44px;color:#a05c56;border-radius:10px}
@media(max-width:700px){.sion-ink-header{min-height:65px;padding:9px 14px}.sion-ink-eyebrow{display:none}.sion-ink-heading p{margin-top:3px}.sion-ink-navigation{padding:0 12px}.sion-ink-toolbar{min-height:58px;gap:4px;padding:7px 6px}.sion-ink-toolbar>.sion-ink-toolgroup{gap:0;padding-right:4px}.sion-ink-toolbar>.sion-ink-history-tools{padding-left:4px;padding-right:0}.sion-ink-tool-panel{max-height:calc(100dvh - 180px)}.sion-ink-notice{font-size:9px;padding:6px 14px}.sion-ink-close{min-height:40px}}
@media(max-width:350px){.sion-ink-toolbar{gap:0;padding-left:0;padding-right:0}.sion-ink-toolbar>.sion-ink-toolgroup{padding-right:2px}.sion-ink-toolbar>.sion-ink-history-tools{padding-left:2px;padding-right:0}.sion-ink-heading h2{font-size:16px}}
@media(max-height:540px) and (orientation:landscape){.sion-ink-tool-panel{top:0;max-height:calc(100dvh - 100px)}.sion-ink-toolbar{min-height:52px;padding-top:4px;padding-bottom:4px}}

.sion-ink-settings-panel>.sion-ink-settings-backup{width:100%;min-height:44px;margin-top:4px;border:1px solid #e3e8ed;border-radius:10px;font-size:11px}