:root{--bg:#eef3f5;--card:#ffffff;--text:#111827;--muted:#64707d;--line:#d5dde5;--accent:#087f8c;--accent-strong:#075f6a;--ink:#17202a;--soft:#f7fafb;--error:#b42318}*{box-sizing:border-box}body,html{margin:0;min-height:100%}body{background:linear-gradient(180deg,rgba(8,127,140,.08),transparent 280px),var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select{font:inherit}main{display:grid;grid-gap:18px;gap:18px;min-height:100vh;padding:32px}.seo-panel,.shell{background:var(--card);border:1px solid var(--line);border-radius:8px;box-shadow:0 24px 70px rgba(17,24,39,.08);margin:0 auto;max-width:1180px;padding:24px;width:100%}.shell{display:grid;grid-gap:22px;gap:22px}.seo-panel{display:grid;grid-gap:30px;gap:30px}.brand-bar{align-items:center;display:flex;justify-content:space-between;gap:16px}.brand{color:var(--ink);gap:10px;text-decoration:none}.brand,.brand-mark{align-items:center;display:inline-flex}.brand-mark{background:var(--ink);border-radius:7px;color:#eaffff;height:36px;justify-content:center;width:36px}.brand-name{color:var(--ink);font-size:17px;font-weight:820}.nav-links{align-items:center;display:flex;flex-wrap:wrap;gap:8px 14px;justify-content:flex-end}.nav-links a{color:var(--muted);font-size:14px;font-weight:700;text-decoration:none}.nav-links a:hover{color:var(--accent-strong)}.page-header{display:grid;grid-gap:8px;gap:8px;max-width:820px}h1,h2,p{margin:0}h1{font-size:clamp(30px,4vw,40px);letter-spacing:0;line-height:1.05}h2{font-size:15px}p,span{color:var(--muted)}.subtitle{color:#3d4854;font-size:18px;line-height:1.35}.best-for,.intro-copy{color:var(--muted);font-size:15px;line-height:1.45;max-width:760px}.best-for strong{color:var(--text)}.controls{min-width:0}.controls,.settings-row{display:grid;grid-gap:12px;gap:12px}.settings-row{grid-template-columns:minmax(260px,1fr) 180px max-content}.action-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}.download-panel{display:grid;grid-gap:10px;gap:10px;justify-items:end;min-width:0}.download-panel.open{background:#f8fafb;border:1px solid var(--line);border-radius:8px;padding:12px}.unlock-note{align-items:center;display:flex;flex-wrap:wrap;gap:8px 12px;justify-content:flex-end;text-align:right}.unlock-note p{line-height:1.35}.unlock-note 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11px}.file-picker-name{color:var(--muted);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}button{align-items:center;background:var(--accent);border:0;color:white;cursor:pointer;display:inline-flex;gap:8px;justify-content:center;font-weight:700;padding:0 16px;white-space:nowrap}button:hover:not(:disabled){background:var(--accent-strong)}button:disabled{cursor:not-allowed;opacity:.5}.secondary{background:#eef3f5;color:var(--text)}.secondary:hover:not(:disabled){background:#e0e8ec}.advanced-toggle{align-items:center;background:var(--soft);border:1px solid var(--line);color:var(--text);display:flex;justify-content:space-between;min-height:58px;padding:10px 14px;text-align:left}.advanced-toggle.open{background:#ffffff;border-bottom-left-radius:0;border-bottom-right-radius:0}.advanced-toggle>span:first-child{display:grid;grid-gap:3px;gap:3px}.advanced-toggle strong{align-items:center;color:var(--text);display:inline-flex;gap:8px}.advanced-toggle:hover:not(:disabled),.advanced-toggle:hover:not(:disabled) strong{color:#ffffff}.advanced-toggle small{color:var(--muted);font-weight:600}.toggle-state{background:#eef3f5;border-radius:8px;color:var(--text);font-weight:760;padding:7px 12px}.advanced{border-radius:0 0 8px 8px;border:1px solid var(--line);border-top:0;display:grid;grid-gap:16px;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr));padding:16px;margin-top:-12px}.advanced label,.preset-guide{color:var(--muted);display:grid;grid-gap:8px;gap:8px;font-size:14px}.preset-guide{background:var(--soft);border:1px solid var(--line);border-radius:8px;grid-column:1/-1;padding:14px}.preset-guide strong{color:var(--text);font-size:15px}.preset-guide p{color:var(--text)}.preset-guide em{color:#9a3412;font-style:normal}.tune-block{align-items:center;background:#ffffff;border:1px solid var(--line);border-radius:8px;display:flex;gap:14px;grid-column:1/-1;justify-content:space-between;padding:12px}.section-title,.tune-block>span{color:var(--text);font-size:14px;font-weight:760}.tune-buttons{display:flex;flex-wrap:wrap;gap:8px}.tune-buttons button{min-height:36px}.secondary.selected{background:var(--text);color:#ffffff}.section-title{border-top:1px solid var(--line);grid-column:1/-1;padding-top:14px}.advanced label:not(.check)>span,.slider-field>span:first-child{align-items:center;display:flex;justify-content:space-between}.advanced strong{color:var(--text)}.advanced small{color:var(--muted);line-height:1.35}.slider-field{align-content:start;background:#ffffff;border:1px solid transparent;border-radius:8px;padding:2px 0}.range-labels{display:flex;justify-content:space-between;margin-top:-2px}.field{align-content:start}input[type=range]{padding:0}input[type=checkbox],input[type=range]{accent-color:var(--accent);min-height:auto}input[type=checkbox]{width:auto}.check{align-content:center;align-items:flex-start;display:flex!important;flex-direction:row;gap:10px!important;justify-content:flex-start}.check>span{display:grid!important;grid-gap:4px;gap:4px;justify-content:start!important;max-width:360px}.reset-button{align-self:end;justify-self:start}.preview-toolbar{gap:16px;justify-content:space-between}.preview-toolbar,.result-meta{align-items:center;display:flex}.result-meta{color:var(--muted);flex-wrap:wrap;gap:8px}.result-meta strong{color:var(--text)}.segmented{background:#eef2f4;border:1px solid var(--line);border-radius:8px;display:flex;gap:2px;padding:3px}.segmented button{background:transparent;color:var(--muted);min-height:34px;padding:0 12px}.segmented 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img{display:block;height:auto;max-height:100%;max-width:100%;object-fit:contain;width:auto}.stage.actual{align-items:start;justify-items:start;overflow:auto}.stage.actual img{max-height:none;max-width:none}.error{color:var(--error);font-weight:700}.empty-state{align-items:center;background:rgba(255,255,255,.78);border:1px solid var(--line);border-radius:8px;color:var(--muted);display:inline-flex;gap:10px;padding:11px 13px}.seo-content{display:grid;grid-gap:14px;gap:14px;padding-top:2px}.seo-content h2{font-size:18px}.faq-list,.guide-list{display:grid;grid-gap:12px;gap:12px;grid-template-columns:repeat(2,minmax(0,1fr))}.faq-list article,.guide-list article{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:14px}.faq-list h3,.guide-list h3{font-size:15px;margin:0 0 6px}.related-list{display:grid;grid-gap:10px;gap:10px;grid-template-columns:repeat(4,minmax(0,1fr))}.related-list a{background:#ffffff;border:1px solid var(--line);border-radius:8px;display:grid;grid-gap:7px;gap:7px;padding:12px;text-decoration:none}.related-list a:hover{border-color:rgba(8,127,140,.45)}.related-list strong{color:var(--text);font-size:14px}.related-list span{font-size:13px;line-height:1.35}@media (max-width:760px){main{padding:16px}.advanced,.faq-list,.guide-list,.previews,.related-list,.settings-row{grid-template-columns:1fr}.advanced-toggle{align-items:stretch;flex-direction:column;gap:10px}.brand-bar{align-items:flex-start;flex-direction:column}.toggle-state{text-align:center}.action-row{justify-content:stretch}.action-row button{flex:1 1}.download-panel{justify-items:stretch}.unlock-note{text-align:left}.preview-toolbar,.tune-block,.unlock-note{align-items:stretch;flex-direction:column}.tune-buttons{display:grid;grid-template-columns:1fr}.segmented{width:100%}.segmented button{flex:1 1}.stage{height:340px}}