:root{--bg:#f4f7fb;--card:#fff;--ink:#172033;--muted:#667085;--line:#d9e1ec;--navy:#16324f;--teal:#147d7e;--soft:#e9f3f4;--danger:#a61b1b;--ok:#116b3a;--shadow:0 10px 28px rgba(29,52,75,.08)}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--ink)}a{color:var(--teal)}.topbar{height:64px;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 4vw}.topbar a{color:#fff;text-decoration:none}.brand{font-weight:800;letter-spacing:.2px}.hero{max-width:1500px;margin:28px auto 16px;padding:0 24px}.hero h1{margin:0;font-size:2rem}.hero p{color:var(--muted);margin:.45rem 0 0}.layout{max-width:1500px;margin:0 auto;padding:0 24px 36px;display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:22px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.data-card,.setup-card,.graph-controls,.graph-stage,.content-page{padding:20px}.card-header{display:flex;justify-content:space-between;gap:16px;align-items:start}.card-header h2,.setup-card h2,.graph-controls h2{margin:.1rem 0}.card-header p{margin:.35rem 0;color:var(--muted)}button,.file-button,select,input,textarea{font:inherit}button,.file-button{border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px 12px;cursor:pointer}.primary{background:var(--teal);border-color:var(--teal);color:white;font-weight:700}.wide{width:100%;padding:12px}.file-button input{display:none}.table-wrap{overflow:auto;margin-top:14px;border:1px solid var(--line);border-radius:10px}table{border-collapse:collapse;width:100%;min-width:780px}th,td{border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:0}th{background:#edf2f8;padding:8px}th.sr,td.sr{width:75px;text-align:center;font-weight:700;background:#f7f9fc}.heading-edit,.input-with-fx{display:flex;gap:6px}.heading-edit input,.cell{width:100%;border:0;padding:10px;background:transparent}.fx{padding:6px 9px;font-weight:800}.fx.active{background:var(--navy);color:#fff;border-color:var(--navy)}.row-tools{display:flex;align-items:center;gap:8px;margin:14px 0}.row-tools input{width:72px}.muted{color:var(--muted)}.tiny{font-size:.82rem}.block-label,.setup-card label,.graph-controls label{display:block;font-weight:650;margin-top:13px}.block-label textarea,.setup-card input,.graph-controls input,.graph-controls select,.modal-card textarea,.modal-card select{display:block;width:100%;margin-top:6px;border:1px solid var(--line);border-radius:8px;padding:9px;background:#fff}.input-with-fx input{margin-top:6px}.input-with-fx .fx{margin-top:6px}.preview-box{margin:20px 0;padding:12px;border-radius:10px;background:var(--soft)}.eyebrow{text-transform:uppercase;font-size:.72rem;letter-spacing:.08em;font-weight:800;color:var(--teal)}.label-preview svg{max-width:100%;height:auto}.message{margin:10px 0}.message.error{color:var(--danger);background:#fff0f0;padding:10px;border-radius:8px}.message.success{color:var(--ok);background:#effaf3;padding:10px;border-radius:8px}.footer{max-width:1500px;margin:0 auto 20px;padding:16px 24px;display:flex;justify-content:space-between;color:var(--muted)}.link-button{border:0;background:none;padding:0;color:var(--teal);text-decoration:underline}.modal{position:fixed;inset:0;background:rgba(10,20,35,.45);display:grid;place-items:center;z-index:50;padding:20px}.hidden{display:none!important}.modal-card{position:relative;width:min(520px,100%);background:#fff;border-radius:15px;padding:24px;box-shadow:var(--shadow)}.modal-close{position:absolute;right:12px;top:10px;border:0;font-size:1.5rem}.graph-shell{max-width:1700px;margin:24px auto 36px;padding:0 24px;display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:20px}.graph-toolbar{display:flex;justify-content:space-between;margin-bottom:10px}.graph-image-wrap{height:calc(100vh - 180px);min-height:560px;display:grid;place-items:center;overflow:auto;background:#fff}.graph-image-wrap img{max-width:100%;max-height:100%;width:auto;height:auto}.graph-controls{overflow:auto;max-height:calc(100vh - 48px);position:sticky;top:20px}.control-section{border-top:1px solid var(--line);padding-top:14px;margin-top:14px}.control-section h3{margin:0 0 8px}.axis-block{margin:12px 0}.three-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:7px}.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}.check-grid label{font-weight:500;margin:0}.check-grid input{display:inline;width:auto;margin:0}.download-row{display:flex;gap:8px;margin-top:14px}.fullscreen-mode{position:fixed;inset:0;z-index:100;background:#fff;padding:0;display:block}.fullscreen-mode .graph-stage{border:0;border-radius:0;height:100vh;padding:0;box-shadow:none}.fullscreen-mode .graph-toolbar,.fullscreen-mode~*,.fullscreen-mode .graph-controls{display:none}.fullscreen-mode .graph-image-wrap{height:100vh;min-height:0}.fullscreen-mode .graph-image-wrap img{width:100%;height:100%;object-fit:contain}.exit-fullscreen{position:fixed;right:18px;top:18px;z-index:120;background:rgba(255,255,255,.92)}.content-page{max-width:850px;margin:32px auto}.content-page h1{margin-top:0}
@media(max-width:1050px){.layout,.graph-shell{grid-template-columns:1fr}.setup-card{order:-1}.graph-controls{position:static;max-height:none}.graph-image-wrap{height:auto;min-height:420px}}@media(max-width:650px){.three-grid,.check-grid{grid-template-columns:1fr}.topbar{padding:0 18px}.layout,.graph-shell{padding:0 12px}.hero{padding:0 14px}.data-card,.setup-card,.graph-controls,.graph-stage{padding:14px}}
.graph-shell.controls-collapsed{grid-template-columns:minmax(0,1fr) 190px}.graph-controls-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:12px}.graph-controls-heading button{font-size:1.3rem;line-height:1;padding:5px 10px}.graph-controls-heading button[aria-expanded="false"]{transform:rotate(-90deg)}.wizard-card{width:min(560px,100%)}.wizard-card label{display:block;font-weight:650;margin:12px 0}.wizard-card input,.wizard-card select{display:block;width:100%;margin-top:6px;padding:9px;border:1px solid var(--line);border-radius:8px}.wizard-card input[type="radio"]{display:inline;width:auto;margin:0 7px 0 0}.wizard-card .radio-choice{display:flex;align-items:center;font-weight:500}.wizard-actions{display:flex;justify-content:space-between;margin-top:22px}.wizard-card .field-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.wizard-card .wizard-help{font-size:.87rem;color:var(--muted)}@media(max-width:1050px){.graph-shell.controls-collapsed{grid-template-columns:1fr}}
.section-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:2px 0;border:0;background:transparent;text-align:left;font-size:1.08rem;font-weight:700;color:var(--ink)}.section-toggle span:last-child{font-size:1.35rem;line-height:1}.section-toggle[aria-expanded="false"] span:last-child{transform:rotate(-90deg)}.section-body{padding-top:6px}.section-body[hidden]{display:none}
.generate-button{background:#16813f;border-color:#16813f;color:#fff;font-weight:700}.generate-button:disabled{background:#9098a3;border-color:#9098a3;color:#fff;cursor:default}.download-row button:disabled{opacity:.48;cursor:default}.graph-image-wrap img[hidden]{display:none}.graph-placeholder{font-size:1.25rem;font-weight:650;color:var(--muted);text-align:center}.graph-toolbar{align-items:center;gap:10px}.graph-toolbar #generateGraph{margin-left:auto}
@media(max-width:600px){.graph-toolbar{flex-wrap:wrap}.graph-toolbar #generateGraph{margin-left:0}}