:root{--font-sans: "Noto Sans KR", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--color-ink: #1d1b19;--color-muted: #5f5a55;--color-border: #e5dfd8;--color-surface: #ffffff;--color-surface-soft: #f6f2ee;--color-primary: #ff5a3c;--color-primary-strong: #e4462a;--color-secondary: #3498db;--color-tertiary: #ff9f1c;--color-accent: #f7c945;--color-shadow: rgba(27, 23, 18, .12);--radius-s: 4px;--radius-m: 12px;--radius-l: 20px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 14px;--space-5: 20px;--space-6: 28px;--space-7: 36px;--shadow-1: 0 8px 24px var(--color-shadow);--shadow-2: 0 16px 36px rgba(27, 23, 18, .18)}body{background:#f0f0f0;color:var(--color-ink)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);min-height:100vh;line-height:1.5}img,video{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}ul{list-style:none;padding:0}.button{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:10px 18px;border-radius:var(--radius-s);border:none;background:var(--color-primary);color:#fff;font-weight:600;letter-spacing:.01em;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,background .2s ease;cursor:pointer}.button-sm{padding:6px 12px;font-size:.85rem}.button-lg{padding:12px 22px;font-size:1rem}.button:hover{background:var(--color-primary-strong);box-shadow:var(--shadow-2)}.button:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none}.button-outline{background:transparent;color:var(--color-ink);border:1px solid var(--color-border);box-shadow:none}.button-outline:hover{background:var(--color-surface-soft);box-shadow:none}.button-soft{background:#1f9aa61a;color:var(--color-secondary);border:1px solid rgba(31,154,166,.2);box-shadow:none}.button-ghost{background:transparent;color:var(--color-muted);border:none;box-shadow:none}input,select,textarea{border:1px solid var(--color-border);border-radius:var(--radius-s);padding:8px 10px;background:#fff;color:var(--color-ink);transition:border-color .2s ease,box-shadow .2s ease}input:focus,select:focus,textarea:focus{outline:none}.input-sm,.select-sm,.textarea-sm{padding:6px 8px;font-size:.85rem}textarea{min-height:120px;resize:vertical}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-l);padding:var(--space-5);box-shadow:var(--shadow-1);transition:all .2s ease}.drop-zone{border:2px dashed rgba(31,154,166,.4);border-radius:var(--radius-m);padding:var(--space-5);background:#ffffffb3;cursor:pointer;transition:border-color .2s ease,background .2s ease}.drop-zone.dragover{border-color:var(--color-secondary);background:#1f9aa614}.drop-zone input{display:none}.drop-zone__content{display:flex;flex-direction:column;gap:var(--space-2);text-align:center}.drop-zone__hint{color:var(--color-muted);font-size:.85rem}.drop-zone__meta{font-size:.75rem;color:var(--color-muted)}.toggle{display:inline-flex;align-items:center;gap:var(--space-3);cursor:pointer;color:var(--color-ink);font-weight:500}.toggle input{display:none}.toggle-pill{width:44px;height:26px;border-radius:999px;background:var(--color-border);position:relative;transition:background .2s ease}.toggle-pill:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .2s ease;box-shadow:0 2px 6px #0003}.toggle input:checked+.toggle-pill{background:var(--color-secondary)}.toggle input:checked+.toggle-pill:after{transform:translate(18px)}.message-box,.error-box{padding:var(--space-3) var(--space-4);border-radius:var(--radius-s);background:#1f9aa614;color:var(--color-muted);font-size:.9rem}.error-box{background:#ff5a3c1f;color:#b33a22}.file-item{display:flex;flex-direction:column;gap:var(--space-4);padding:var(--space-3);border-radius:var(--radius-m);border:1px solid var(--color-border);background:var(--color-surface-soft);min-width:0}.file-info{display:flex;flex-direction:column;gap:var(--space-3)}.file-name{font-weight:600;overflow-wrap:anywhere}.preview-grid{display:grid;gap:var(--space-4);grid-template-columns:repeat(auto-fill,minmax(min(100%,360px),1fr))}.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-3)}.fill-parent-width{width:100%;border-radius:var(--radius-s)}.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em}.badge-accent{background:#ff5a3c26;color:var(--color-primary-strong)}.badge-muted{background:#5f5a551f;color:var(--color-muted)}.placeholder{display:grid;gap:var(--space-3);max-width:520px}.tool-badge{font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;padding:4px 12px;border-radius:999px;background:#1f9aa61a;color:var(--color-secondary);font-weight:600}.app-shell{display:flex;flex-direction:column;min-height:100vh}.app-main{flex:1;padding:var(--space-5) var(--space-5) var(--space-6)}.page{display:grid;gap:var(--space-7)}.home-page{max-width:960px;margin:0 auto}.home-panel{padding:var(--space-6);display:grid;gap:var(--space-6)}.home-header{display:grid;gap:var(--space-2)}.home-kicker{font-size:.9rem;text-transform:uppercase;letter-spacing:.3em;color:var(--color-secondary)}.home-title{font-size:clamp(2.2rem,3vw,3.2rem);line-height:1.1;font-weight:800;color:transparent;background-image:linear-gradient(90deg,#2d6cdf,#1fb7a3);-webkit-background-clip:text;background-clip:text}.home-subtitle{color:var(--color-muted);font-size:.95rem}.home-section{gap:var(--space-4)}.section-title{font-size:1.25rem;padding-left:6px}.section-count{display:inline-flex;align-items:center;justify-content:center;padding:4px 10px;border-radius:999px;background:#3498db1f;color:var(--color-secondary);font-weight:600;font-size:.85rem}.tool-button-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-3)}.tool-button{display:grid;gap:6px;padding:var(--space-3) var(--space-4);border-radius:var(--radius-s);border:1px solid var(--color-border);background:#f6f8fb;color:var(--color-ink);text-decoration:none;transition:background .2s ease,border-color .2s ease,transform .2s ease}.tool-button:hover{background:#3498db14;border-color:#3498db66}.tool-button__title{font-weight:700}.tool-button__desc{font-size:.85rem;color:var(--color-muted)}.hero{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--space-5);align-items:center}.hero-kicker{font-size:.85rem;text-transform:uppercase;letter-spacing:.4em;color:var(--color-secondary);margin-bottom:var(--space-3)}.hero-title{font-size:clamp(2rem,3vw,3rem);line-height:1.1;margin-bottom:var(--space-4)}.hero-accent{display:block;color:var(--color-primary)}.tool-section{display:grid;gap:var(--space-5)}.section-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3)}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:var(--space-3)}.card-link{display:block}.tool-card__tile{display:grid;gap:var(--space-3);height:100%}.tool-card__head{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2)}.tool-page{display:grid;gap:var(--space-4)}.tool-page--compact{max-width:800px;margin:0 auto}.tool-page--extend{max-width:none}.tool-page--full{max-width:none;min-height:calc(100dvh - var(--space-5) - var(--space-6));grid-template-rows:auto 1fr}.tool-page--full.tool-page--no-header{grid-template-rows:1fr}.tool-header{display:grid;gap:var(--space-2);max-width:720px}.tool-header--full{max-width:none}.tool-back{font-size:.85rem;text-transform:uppercase;letter-spacing:.18em;color:var(--color-secondary)}.tool-title-row{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.tool-title{font-size:clamp(2rem,2.6vw,2.8rem);min-width:0;overflow-wrap:anywhere}.tool-subtitle{color:var(--color-muted)}.tool-card{display:grid;gap:var(--space-4)}.tool-card--full{height:100%;min-height:0}.stack{display:grid;gap:var(--space-3)}.muted{color:var(--color-muted)}@media(max-width:960px){.app-main{padding:var(--space-4)}.home-panel{padding:0}}.formula-panel{display:grid;gap:var(--space-4)}.formula-options{display:flex;align-items:center;gap:var(--space-3)}.formula-list{display:grid;gap:var(--space-3)}.formula-block{position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:var(--space-3);padding:var(--space-4);border-radius:var(--radius-m);background:#f4f1ed;border:1px solid var(--color-border);font-size:1.25rem;font-weight:600}.formula-block:after{position:absolute;right:12px;bottom:8px;font-size:.75rem;color:var(--color-muted);content:attr(data-index)}.formula-input-wrapper{position:relative;flex:1}.formula-display{min-height:1.6em;border-radius:var(--radius-s);padding:6px 10px;white-space:pre;overflow-x:auto;color:var(--color-ink);font-family:var(--font-sans);font-size:inherit;font-weight:inherit;letter-spacing:normal;line-height:1.6}.formula-input{position:absolute;inset:0;width:100%;height:100%;cursor:text;color:transparent;caret-color:var(--color-ink);background:transparent;border:none;padding:6px 10px;font-family:var(--font-sans);font-size:inherit;font-weight:inherit;letter-spacing:normal;line-height:1.6}.formula-input:focus{outline:none}.formula-actions{display:flex;gap:var(--space-2);justify-content:center}.formula-action-button{box-shadow:none}.formula-action-button--add{color:#2a56c3;background:#2e5fd81f;border-color:#2e5fd83d}.formula-action-button--add:hover:not(:disabled){color:#2047ad;background:#2e5fd833;border-color:#2e5fd857;box-shadow:none}.formula-action-button--remove{color:#b94434;background:#d34d3a1f;border-color:#d34d3a3d}.formula-action-button--remove:hover:not(:disabled){color:#a03a2d;background:#d34d3a33;border-color:#d34d3a57;box-shadow:none}.formula-action-button:disabled{opacity:.55;background:#a0948a29;border-color:#d2cac2;color:#8f8377}.icon-button{width:38px;height:38px;border-radius:50%;padding:0;display:inline-flex;align-items:center;justify-content:center}.icon-button svg{width:22px;height:22px}.highlight-function{color:#1e4bd1}.highlight-constant{color:#1b8f3c}.highlight-result,.highlight-result-focused{color:#7a23d4}.highlight-result-focused{background:#f7c94559;border-radius:4px}.highlight-variable{color:#c46b00}.highlight-variable-focused{color:#c46b00;background:#f7c9454d;border-radius:4px}.variable-grid{display:grid;gap:var(--space-3)}.variable-item{display:grid;grid-template-columns:60px minmax(0,1fr);gap:var(--space-3);align-items:center;padding:2px var(--space-2);border-radius:var(--radius-s);background:transparent;border:none}.variable-item:focus-within{background:#c46b000f}.variable-label{font-weight:600}.variable-label.focused{color:#c46b00}.variable-input.focused{border-color:#c46b00;box-shadow:0 0 0 3px #c46b0033}.formula-info{color:var(--color-muted);font-size:.85rem}.special-calculator{display:grid;gap:var(--space-4);align-items:start}.special-fields{display:grid;gap:var(--space-3);max-width:520px}.special-field{display:grid;grid-template-columns:160px minmax(0,1fr);gap:var(--space-3);align-items:center;padding:var(--space-3);background:#f4f1ed;border-radius:var(--radius-s)}.special-result{font-weight:700;font-size:1.1rem}.image-base64{display:grid;gap:var(--space-4)}.image-base64-grid{display:grid;gap:var(--space-4);grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.image-base64-preview{border-radius:var(--radius-m);border:1px solid var(--color-border);background:#fff;padding:var(--space-3);display:grid;place-items:center;min-height:240px}.image-base64-preview img{max-width:100%;max-height:360px;object-fit:contain}.image-base64-output{display:grid;gap:var(--space-3)}.image-base64-output textarea{min-height:280px;font-family:var(--font-mono);font-size:.8rem}.image-base64-actions{display:flex;justify-content:flex-end}.csv-viewer{display:grid;gap:var(--space-4)}.table-shell{border-radius:var(--radius-m);border:1px solid var(--color-border);background:#fff;overflow:hidden}.table-scroll{max-height:70vh;overflow:auto}.data-table{width:100%;border-collapse:collapse;font-size:.9rem}.data-table thead th{position:sticky;top:0;background:#f6f2ee;border-bottom:1px solid var(--color-border);text-align:left;padding:8px 10px;font-weight:600}.data-table td{border-bottom:1px solid #f0e9e2;padding:6px 10px;vertical-align:top}.code-layout{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:var(--space-4)}.code-panel{display:grid;gap:var(--space-3)}.python-editor{min-height:calc(100dvh - 220px)}.python-editor .code-panel{min-height:0}.code-panel--editor{grid-template-rows:minmax(0,1fr) auto}.code-editor{min-height:0}.python-editor .code-editor textarea{height:100%;min-height:360px}.python-editor .code-editor .CodeMirror{height:100%}.output-box{background:#161616;color:#d6d2cc;border-radius:var(--radius-s);padding:var(--space-3);min-height:160px;overflow:auto;font-family:var(--font-mono);font-size:.85rem;white-space:pre-wrap}.image-grid{display:grid;gap:var(--space-3)}.camera-shell{display:grid;gap:var(--space-4)}.camera-media{position:relative;border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--color-border);background:#1c1b19}.camera-media video,.camera-media canvas{width:100%;height:auto;display:block}.camera-message{position:absolute;inset:0;display:grid;place-items:center;color:#fff;background:#00000059}.camera-controls{display:flex;flex-wrap:wrap;gap:var(--space-2);align-items:center}.camera-controls-trigger{display:none}.camera-shell--page-fullscreen{position:fixed;inset:0;z-index:10;height:100%;gap:0;background:#000;grid-template-rows:1fr}.camera-shell--page-fullscreen .camera-media{border-radius:0;border:none;height:100%}.camera-shell--page-fullscreen .camera-media canvas,.camera-shell--page-fullscreen .camera-media video{width:100%;height:100%;object-fit:cover}.camera-shell--page-fullscreen .camera-controls{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:var(--space-3);display:flex;justify-content:center;background:linear-gradient(to top,#000000b8,#0000);opacity:0;transform:translateY(100%);pointer-events:none;transition:opacity .16s ease,transform .16s ease}.camera-shell--page-fullscreen .camera-controls-trigger{display:block;position:absolute;left:0;right:0;bottom:0;height:88px;z-index:1}.camera-shell--page-fullscreen .camera-controls-trigger:hover+.camera-controls,.camera-shell--page-fullscreen .camera-controls:hover,.camera-shell--page-fullscreen:focus-within .camera-controls{opacity:1;transform:translateY(0);pointer-events:auto}.equation-layout{display:grid;gap:var(--space-4)}.equation-canvas{border:1px solid var(--color-border);border-radius:var(--radius-s);background:#fff}.equation-output{display:grid;gap:var(--space-3)}.equation-output .latex-box,.equation-output .render-box{min-height:80px;background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-s);padding:var(--space-3)}.pdf-layout{display:grid;gap:var(--space-4);grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.pdf-panel{display:grid;gap:var(--space-3)}.file-list{display:grid;gap:var(--space-2)}.file-row{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);background:#f4f1ed;border-radius:var(--radius-s)}.file-row.dragging{opacity:.5}.file-row .meta{margin-left:auto;font-size:.75rem;color:var(--color-muted)}.handle{cursor:grab;font-size:1.1rem;color:var(--color-muted)}.pdf-ops{display:flex;flex-wrap:wrap;gap:var(--space-2)}.pdf-ops label{display:inline-flex;align-items:center;gap:var(--space-2);padding:6px 12px;border-radius:999px;background:#f4f1ed;cursor:pointer}.terminal{background:#111;color:#c9d1d9;padding:var(--space-3);border-radius:var(--radius-s);font-size:.75rem;font-family:var(--font-mono);max-height:240px;overflow:auto}.progress-bar{height:6px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent));border-radius:999px;animation:progress 1.8s linear infinite}@keyframes progress{0%{background-position:0 0}to{background-position:-300% 0}}.web-collection{display:grid;grid-template-columns:280px minmax(0,1fr);gap:var(--space-4);min-height:70vh}.web-collection--collapsed{grid-template-columns:minmax(0,1fr)}.web-sidebar{background:#1f1d1b;color:#f6f2ee;border-radius:var(--radius-m);padding:var(--space-4);display:grid;grid-template-rows:auto auto minmax(0,1fr);gap:var(--space-4);min-height:0;position:relative}.web-links{display:grid;grid-auto-rows:max-content;gap:var(--space-2);align-content:start;overflow:auto;overflow-x:hidden;min-height:0}.web-status{position:absolute;right:var(--space-4);bottom:var(--space-4);max-width:calc(100% - (var(--space-4) * 2));pointer-events:none}.web-status .message-box{width:auto}.web-link{display:flex;gap:var(--space-2);align-items:center;padding:var(--space-2);border-radius:var(--radius-s);background:#ffffff14;cursor:grab;position:relative;min-width:0}.web-link:active{cursor:grabbing}.web-link>div{min-width:0}.web-link-title,.web-link-url{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.web-link.drag-source{opacity:.6}.web-link.drop-before:before,.web-link.drop-after:after{content:"";position:absolute;left:0;right:0;height:3px;border-radius:999px;background:var(--color-secondary)}.web-link.drop-before:before{top:-6px}.web-link.drop-after:after{bottom:-6px}.web-link.active{background:#fff3}.web-link-title{font-weight:600;font-size:.9rem}.web-link-url{font-size:.75rem;color:#f6f2eeb3}.web-viewer{border-radius:var(--radius-m);border:1px solid var(--color-border);background:#fff;overflow:hidden;display:grid;grid-template-rows:auto 1fr}.web-header{padding:var(--space-3);border-bottom:1px solid var(--color-border);display:flex;gap:var(--space-3);align-items:center}.web-frame{width:100%;height:100%;border:none}.tool-page--full .csv-viewer{min-height:100%;height:100%;grid-template-rows:auto auto auto 1fr}.tool-page--full .table-shell{min-height:0;height:100%}.tool-page--full .table-scroll{max-height:none;height:100%}.tool-page--full .python-editor,.tool-page--full .web-collection{min-height:100%;height:100%}.tool-page--full .web-viewer{min-height:0;height:100%}@media(max-width:1000px){.pdf-layout,.code-layout,.image-base64-grid,.web-collection{grid-template-columns:1fr}}