:root{--bg:#f3f0e8;--panel:#fffbf5eb;--border:#143d591a;--input-border:#143d5929;--input-bg:#ffffffe0;--heading:#12263a;--text:#304b5f;--muted:#5f7687;--accent:#0f8b8d;--tag-bg:#0f8b8d1a;--shadow-soft:0 18px 50px #12263a14;--sans:"Avenir Next", "Nunito Sans", "Segoe UI", "Helvetica Neue", sans-serif;font-family:var(--sans);color:var(--text);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:radial-gradient(circle at top,#ffc47a59,#0000 30%),linear-gradient(#f7f1e4 0%,#f1efe9 52%,#edf3f5 100%);font-weight:400;line-height:1.5}*{box-sizing:border-box}html{min-height:100%}body{min-width:320px;min-height:100vh;margin:0}body,button,input,select{font-family:var(--sans)}#root{min-height:100vh}h1,h2,p{margin:0}h1,h2{color:var(--heading);line-height:1.08}h1{letter-spacing:-.05em;font-size:clamp(2.3rem,4vw,4.5rem)}a{color:inherit}button,input,select{font:inherit}.app-shell{gap:28px;padding:40px;display:grid}.hero-panel{border:1px solid var(--border);color:#f4f8fb;background:radial-gradient(circle at 100% 0,#ffb86c47,#0000 30%),radial-gradient(circle at 0 100%,#4b97ff2e,#0000 28%),linear-gradient(135deg,#081c3af5,#12375cf0);border-radius:28px;padding:36px;position:relative;overflow:hidden;box-shadow:0 24px 60px #0c1c2e2e}.hero-copy{max-width:760px}.eyebrow{text-transform:uppercase;letter-spacing:.14em;color:#f4f8fbb8;margin-bottom:12px;font-size:.77rem}.lead{color:#f4f8fbd1;max-width:62ch}.workspace{grid-template-columns:minmax(300px,360px) minmax(0,1fr);gap:24px;display:grid}.controls-panel,.preview-panel{border:1px solid var(--border);background:var(--panel);box-shadow:var(--shadow-soft);border-radius:28px}.controls-panel{align-content:start;gap:20px;padding:24px;display:grid}.panel-block{border-bottom:1px solid var(--border);gap:14px;padding-bottom:18px;display:grid}.panel-block:last-child{border-bottom:0;padding-bottom:0}.panel-block h2,.preview-header h2{margin:0;font-size:1.08rem}.upload-field,.field{gap:8px;display:grid}.upload-field span,.field span{color:var(--muted);font-size:.95rem}.upload-field input,.field select,.field input[type=color]{box-sizing:border-box;border:1px solid var(--input-border);background:var(--input-bg);width:100%;min-height:46px;color:var(--heading);font:inherit;border-radius:16px;padding:10px 14px}.upload-field input{padding:11px 12px}.field input[type=color]{padding:8px}.field input[type=range]{width:100%;accent-color:var(--accent)}.primary-button{color:#fff;min-height:52px;font:inherit;cursor:pointer;background:linear-gradient(135deg,#0f8b8d,#0f5c79);border:0;border-radius:18px;font-weight:700;transition:transform .16s,box-shadow .16s,opacity .16s;box-shadow:0 16px 30px #0f5c7940}.primary-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 22px 36px #0f5c794d}.primary-button:disabled{cursor:not-allowed;opacity:.58;box-shadow:none}.hint,.error-message,.preview-label,.resolution-pill,.empty-state span{font-size:.92rem}.hint,.preview-label,.empty-state span{color:var(--muted)}.error-message{color:#bc4749}.preview-panel{gap:20px;padding:24px;display:grid}.preview-header{justify-content:space-between;align-items:center;gap:16px;display:flex}.preview-label{margin-bottom:6px}.resolution-pill{white-space:nowrap;background:var(--tag-bg);color:var(--heading);border-radius:999px;margin:0;padding:10px 14px}.preview-stage{border:1px dashed var(--input-border);background-color:#eef5f8;background-image:linear-gradient(45deg,#103f6f08 25%,#0000 25%),linear-gradient(-45deg,#103f6f08 25%,#0000 25%),linear-gradient(45deg,#0000 75%,#103f6f08 75%),linear-gradient(-45deg,#0000 75%,#103f6f08 75%),none;background-position:0 0,0 12px,12px -12px,-12px 0;background-repeat:repeat,repeat,repeat,repeat,repeat;background-size:24px 24px;background-attachment:scroll,scroll,scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box,border-box,border-box;border-radius:24px;place-items:center;min-height:580px;padding:20px;display:grid;overflow:auto}.preview-canvas{border-radius:18px;max-width:100%;height:auto;display:block;box-shadow:0 24px 50px #0d202d2e}.empty-state{text-align:center;gap:8px;max-width:28rem;display:grid}.empty-state p{color:var(--heading);font-size:1.05rem}@media (width<=980px){.app-shell{padding:18px}.workspace{grid-template-columns:1fr}.preview-stage{min-height:420px}.preview-header{flex-direction:column;align-items:flex-start}}