/* A quiet, step-by-step art studio, adapted from the supplied UI reference. */
:root{font-family:"Microsoft JhengHei","Noto Sans CJK TC",system-ui,sans-serif;font-size:16px;color:#393c34;background:#f3eee7;--ink:#34443b;--muted:#7b7c6c;--line:#d8d3c7;--red:#aa4335;--green:#386652;--paper:#f9f5ed}
*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:radial-gradient(ellipse at 20% 20%,#fffaf388,transparent 65%),#f3eee7}button,input,textarea{font:inherit}button{cursor:pointer;touch-action:manipulation}button:disabled{opacity:.38;cursor:not-allowed}button,input,textarea,summary{outline-offset:4px}button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible,.stage:focus-visible{outline:3px solid #b36246}h1,h2,h3,p{margin-top:0}h2,h3{font-family:"DFKai-SB","KaiTi","Noto Serif CJK TC",serif;font-weight:500}button{color:inherit}svg.icon{display:block;width:22px;height:22px;flex:none}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.app-shell{max-width:1600px;margin:auto;padding:16px 32px 10px}.masthead{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:54px;border-bottom:1px solid #d9d2c46b;padding-bottom:12px}.school-wordmark{width:194px;height:auto}.header-actions{display:flex;align-items:center;gap:20px}.save-state{font-size:.75rem;color:var(--muted)}.save-state.warning{color:var(--red)}.text-button{min-height:44px;border:0;background:transparent;font-size:.875rem;padding:8px 10px}.header-actions .text-button>span{display:inline-grid;place-items:center;width:21px;height:21px;border:1px solid #9eab98;border-radius:50%;margin-left:5px}.journey{display:flex;gap:24px;list-style:none;margin:0;padding:0;color:#9a9889;font-size:.875rem}.journey li{display:flex;align-items:center;gap:8px}.journey li>span{font-family:serif}.journey li[aria-current]{color:var(--red)}
.studio{position:relative;display:grid;grid-template-columns:140px minmax(0,1fr) 120px;grid-template-rows:minmax(0,1fr) auto;gap:14px 20px;min-height:600px;height:calc(100vh - 112px);height:calc(100svh - 112px);padding:16px 20px 0}.studio-sign{padding:24px 0 0 10px;align-self:start;justify-self:start;display:flex;flex-direction:column;align-items:center;gap:14px}.studio-sign h1{font-family:"DFKai-SB","KaiTi","Noto Serif CJK TC",serif;font-size:3rem;letter-spacing:.18em;writing-mode:vertical-rl;font-weight:500;margin:0;line-height:1.2;color:#24332b}.name-seal{display:block;color:#fff6ea;background:var(--red);font-family:serif;writing-mode:vertical-rl;font-size:.75rem;letter-spacing:.1em;padding:6px 4px;border:3px double #f1dfcc;max-height:78px}.studio-sign p{writing-mode:vertical-rl;letter-spacing:.2em;font-size:.8125rem;color:#93917e;margin:3px 0 0}.work-surface{display:flex;flex-direction:column;align-items:center;min-width:0;min-height:0}.flow-heading{text-align:center;margin:0 0 8px}.step-caption{font-size:.75rem;color:#96917d;letter-spacing:.17em}.flow-heading h2{font-size:1.4rem;letter-spacing:.1em;margin:8px 0 0;line-height:1.4}.canvas-topline{color:#8b8c7b;font-size:.75rem;min-height:22px;margin-bottom:4px}.canvas-frame{position:relative;flex:none;width:min(100%,520px,calc(100vh - 350px));width:min(100%,520px,calc(100svh - 350px));aspect-ratio:1;border:0;border-radius:8%;background:#7599aa url("./assets/drop-stages.webp") 1.812% 45.202% / 322.581% 198.02% no-repeat;box-shadow:0 18px 25px -16px #405a4966;margin:auto 0}.stage{position:absolute;inset:8.8%;border:0;border-radius:6%;overflow:hidden;touch-action:none;background:#b4d0d9;cursor:crosshair;box-shadow:0 0 9px 5px #a8c6d6}.stage:after{content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;box-shadow:inset 0 2px 14px #55798a24}.stage canvas{display:block;width:100%;height:100%}.brush-cursor{position:absolute;left:50%;top:50%;width:19px;height:19px;border:1px solid white;border-radius:50%;box-shadow:0 0 0 1px #263c37;opacity:0;pointer-events:none;transform:translate(-50%,-50%)}.stage:focus-visible .brush-cursor{opacity:1}.stage-hint{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);padding:7px 11px;border-radius:40px;white-space:nowrap;background:#faf7efdc;color:#52634d;font-size:.875rem;pointer-events:none;transition:opacity .2s}.stage-hint.hidden{opacity:0}.canvas-hint{text-align:center;font-size:.875rem;color:var(--muted);line-height:1.5;min-height:2.9em;max-width:530px;margin:14px 0 0}
.tool-rail{display:flex;flex-direction:column;align-items:center;gap:10px;justify-content:center}.tool-row{display:flex;flex-direction:column;gap:10px}.tool,.tool-rail .quiet-button,.icon-button{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:5px;border:1px solid #d2cfc3;background:transparent;color:#797965;border-radius:50%;width:58px;height:58px;min-height:44px;padding:8px;font-size:.75rem;line-height:1.3}.tool.active{background:#fffcf7;border-color:#9d8670;color:#725243;box-shadow:0 3px 9px #87725416}.tool:hover,.icon-button:hover,.quiet-button:hover:not(:disabled){background:#fff9f0}.tool .icon{width:22px;height:22px}.tool-rail .quiet-button .icon{width:18px;height:18px}.history-tools{display:flex;gap:6px}.history-tools .quiet-button{width:48px;height:48px;font-size:.6875rem}.rail-divider{width:30px;height:1px;background:var(--line);margin:3px}.icon-button{width:44px;height:44px;border:0}.app-shell[data-flow="1"] [data-tool="cloud"],.app-shell[data-flow="1"] [data-tool="wave"],.app-shell[data-flow="1"] [data-tool="vortex"],.app-shell[data-flow="2"] [data-tool="dye"],.app-shell[data-flow="2"] [data-tool="splash"]{display:none}
.bottom-bar{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:10px 0 2px;min-height:94px}.color-dock{display:flex;align-items:center;gap:22px}.ink-tabs{display:flex;flex-direction:column;border-left:1px solid var(--line);padding-left:12px;gap:0}.ink-tab{border:0;background:transparent;font-size:.8125rem;min-height:32px;padding:3px 9px;color:#8b8d7e}.ink-tab.active{color:var(--red);font-weight:700}.palette{display:flex;gap:12px}.swatch{display:flex;align-items:center;flex-direction:column;gap:7px;min-width:44px;min-height:56px;padding:4px 3px;background:none;border:0;border-radius:6px}.swatch-dot{background:var(--swatch);width:28px;height:28px;border-radius:50%;position:relative;box-shadow:0 2px 3px #3b4c3026}.swatch.active .swatch-dot{outline:1px solid #8c887a;outline-offset:4px}.swatch.active .swatch-dot:after{content:"";position:absolute;width:5px;height:9px;border:solid white;border-width:0 2px 2px 0;left:11px;top:7px;transform:rotate(45deg)}.swatch-name{font-size:.75rem;color:#797b6d}.ink-settings{position:relative;font-size:.8125rem;color:#6e7567}.ink-settings summary{cursor:pointer;min-height:44px;display:flex;align-items:center;gap:6px;list-style:none;padding:7px}.ink-settings summary:after{content:"⌃"}.ink-settings[open] summary:after{content:"⌄"}.ink-settings strong{font-weight:500}.amount-popover{position:absolute;bottom:54px;left:-45px;width:210px;padding:16px;background:#fffaf3;border:1px solid var(--line);box-shadow:0 8px 26px #534b3b1f;border-radius:10px;z-index:3}.amount-popover label{display:block}.amount-popover input{width:100%;min-height:44px;accent-color:var(--green)}.amount-scale{display:flex;justify-content:space-between;font-size:.75rem}.step-actions{display:flex;align-items:center;gap:14px;margin-left:auto;flex:none}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:18px;min-height:48px;border-radius:6px;padding:12px 22px;font-size:.9375rem;letter-spacing:.05em;border:1px solid transparent}.primary-button{background:var(--red);color:#fff9ef;box-shadow:0 5px 14px #ac55451c}.primary-button:hover:not(:disabled){background:#92382d}.secondary-button{background:#fff9f0;border-color:#cfc4b2;color:#755b47}.stir-guide{display:flex;align-items:center;gap:12px;font-size:.875rem;color:#7e816c}.stir-guide img{width:46px;height:68px;object-fit:contain}.stir-guide p{margin:0;line-height:1.7}.site-footer{display:flex;align-items:center;justify-content:space-between;font-size:.6875rem;color:#939381;gap:12px;min-height:28px;padding-top:4px}.site-footer p{margin:0}.studio.canvas-expanded .studio-sign{visibility:hidden}.studio.canvas-expanded .canvas-frame{width:min(100%,620px,calc(100svh - 310px))}.studio.canvas-expanded .flow-heading{display:none}
.guide-dialog{border:1px solid var(--line);border-radius:15px;background:#fcf8ef;color:var(--ink);width:min(520px,calc(100% - 28px));max-height:85vh;padding:28px;box-shadow:0 20px 70px #28392b33}.guide-dialog::backdrop{background:#25352c70}.close-button{border:0;background:none;font-size:1.8rem;width:44px;height:44px;color:#66745d}.guide-dialog>.close-button{position:absolute;right:8px;top:8px}.learning-panel h2{font-size:1.5rem;margin:0 0 20px}.learning-panel h3{font-size:1.0625rem;margin-bottom:10px}.challenge{display:grid;grid-template-columns:1fr 84px;gap:8px;padding:16px;background:#edf1e3;border-radius:9px}.challenge-label{font-size:.75rem;color:#768369}.challenge h3{margin:8px 0;line-height:1.6}.challenge img{width:84px;height:125px;object-fit:contain}.challenge p{grid-column:1/-1;margin:0;font-size:.9375rem;line-height:1.6}.observation-card{margin-top:24px}.observation-card>img{width:100%;height:auto;border-radius:8px;display:block}.stage-captions{display:flex;justify-content:space-around;font-size:.8125rem}.diagram-note{font-size:.75rem;color:var(--muted);line-height:1.5}.mission{margin-top:20px;border-top:1px solid var(--line);padding-top:16px}.mission-head{display:flex;align-items:center;justify-content:space-between}.mission-head h3{margin:0}.mission progress{width:100%;height:7px;accent-color:var(--green);margin:12px 0}.mission ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}.mission li{font-size:.875rem;display:flex;align-items:center;gap:8px}.mission-state{font-size:.75rem;color:#8b8f80}.mission .done .mission-state{color:var(--green)}.context-note{border-top:1px solid var(--line);padding-top:14px;margin-top:22px;font-size:.875rem;line-height:1.7}.context-note summary{cursor:pointer;min-height:44px}.context-body>img{width:100%;height:90px;object-fit:cover;border-radius:8px}.context-note a{color:var(--red)}
.overlay{position:fixed;inset:0;z-index:20;background:radial-gradient(ellipse at 60% 15%,#fff9ed99,transparent 70%),#f3eee7;overflow:auto}.paper-dialog{width:min(1400px,100%);margin:auto;padding:24px 32px;min-height:100vh;min-height:100svh;display:flex;flex-direction:column}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-bottom:18px;border-bottom:1px solid #ddd4c56b}.dialog-head h2{font-size:1.5rem;margin:7px 0 0;letter-spacing:.07em}.dialog-body{display:grid;grid-template-columns:minmax(0,1fr) 310px;align-items:center;gap:8%;flex:1;padding:24px 6% 8px}.paper-preview{text-align:center;min-width:0}.paper-preview canvas{display:block;width:auto;max-width:100%;max-height:calc(100vh - 210px);max-height:calc(100svh - 210px);margin:auto;box-shadow:0 16px 32px #76674a33}.print-reveal{font-size:.875rem;color:#8c826e;margin:15px 0 0}.reflection{min-width:0}.decorate-tabs{display:flex;gap:10px;margin-bottom:24px}.decorate-tabs button{flex:1;min-height:46px;border:1px solid #d1c7b6;background:transparent;border-radius:30px;font-size:.9375rem;color:#8c7a64}.decorate-tabs button.active{background:#fffaf0;border-color:#a78270;color:var(--red)}.reflection h3{font-size:1.3rem;margin:0 0 20px}.reflection label{display:block;font-size:.875rem;color:#746d5f;margin:18px 0 9px}.optional{font-size:.75rem}.reflection input,.reflection textarea{display:block;width:100%;background:#fffbf680;border:1px solid #d2c7b9;border-radius:5px;padding:11px 12px;min-height:46px;font-size:1rem;color:#414339}.reflection textarea{line-height:1.6;resize:vertical;min-height:102px}.form-note{font-size:.8125rem;line-height:1.6;color:#8c826f;margin:12px 0}.reflection>.primary-button{width:100%;margin-top:22px}.stamp-styles{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}.stamp-styles button{min-height:58px;background:#fff9f1;border:1px solid #d5c7b8;border-radius:5px;color:#8b7868;font-size:.9375rem}.stamp-styles button.active{border-color:var(--red);background:#b3473410;color:var(--red)}.stamp-styles small{display:block;margin-top:4px;font-size:.75rem}.stamp-actions{display:flex;align-items:center;gap:10px;margin-top:16px}.stamp-actions button{font-size:.875rem;padding:8px 12px;min-height:44px}.stamp-actions .secondary-button{flex:1}#stamp-preview{display:block;width:105px;height:105px;margin:0 auto 12px}.completion-actions{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px;margin:10px 0 0}.completion-actions p{flex-basis:100%;text-align:center;font-size:.8125rem;color:#8b816f;margin:0}.overlay[data-phase="complete"] .dialog-body{display:flex;justify-content:center;padding:20px 0 0}.overlay[data-phase="complete"] .paper-preview canvas{max-height:calc(100svh - 235px)}.overlay[data-phase="complete"] .print-reveal{display:none}.paper-preview.reveal{animation:paper-reveal .75s ease-out both}@keyframes paper-reveal{from{opacity:.2;transform:translateY(24px) rotate(-1deg)}to{opacity:1;transform:none}}
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