:root{--bg:#f6f4ef;--surface:#fff;--surface-2:#ebe7dd;--ink:#171717;--muted:#69665f;--line:#d8d1c3;--accent:#1f6f50;--accent-dark:#174d39}*{box-sizing:border-box}body{background:var(--bg);min-height:100vh;color:var(--ink);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer}.topbar{z-index:10;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#f6f4efeb;justify-content:space-between;align-items:center;gap:16px;padding:18px clamp(18px,5vw,56px);display:flex;position:sticky;top:0}.brand{color:var(--ink);cursor:pointer;background:0 0;border:0;align-items:center;gap:10px;font-weight:850;text-decoration:none;display:inline-flex}.brand-mark{background:var(--ink);color:#fff;border-radius:6px;place-items:center;width:32px;height:32px;font-size:.9rem;display:grid}.nav-actions,.button-row,.workbench-actions,.summary-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.button{border:1px solid var(--line);background:var(--surface);min-height:40px;color:var(--ink);border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:0 14px;font-weight:750;display:inline-flex}.button.primary{border-color:var(--accent);background:var(--accent);color:#fff}.button:disabled{cursor:default;opacity:.55}.hero{grid-template-columns:minmax(0,.9fr) minmax(320px,1.1fr);align-items:center;gap:clamp(28px,5vw,64px);width:min(1180px,100% - 36px);margin:0 auto;padding:72px 0 44px;display:grid}.hero-copy{max-width:560px}.eyebrow{color:var(--accent-dark);letter-spacing:.08em;text-transform:uppercase;margin:0 0 12px;font-size:.78rem;font-weight:850}h1,h2,h3,p{margin-top:0}h1{letter-spacing:-.045em;margin-bottom:18px;font-size:clamp(3rem,7vw,5.6rem);line-height:.95}h2{letter-spacing:-.025em;margin-bottom:12px;font-size:clamp(1.5rem,3vw,2.25rem)}h3{margin-bottom:8px;font-size:1.05rem}p{color:var(--muted);line-height:1.6}.hero-text{max-width:460px;font-size:1.08rem}.panel,.step-card,.stack-card,.auth-card,.workbench,.mission-card,.side-card{border:1px solid var(--line);background:var(--surface);border-radius:10px}.preview-panel{overflow:hidden}.preview-head,.workbench-head{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;display:flex}.muted-label{color:var(--muted);font-size:.82rem;font-weight:750}.code-preview,.serial-output{color:#e8e3d9;background:#151515;margin:0;padding:18px;font-family:SFMono-Regular,Consolas,monospace;font-size:.88rem;line-height:1.55;overflow:auto}.steps,.dashboard-grid,.stack-grid{gap:14px;width:min(1180px,100% - 36px);margin:0 auto;display:grid}.steps{grid-template-columns:repeat(4,minmax(0,1fr));padding-bottom:56px}.step-card,.stack-card,.auth-card,.workbench,.mission-card,.side-card{padding:18px}.step-number{color:var(--accent);font-weight:900}.auth-page{grid-template-columns:minmax(0,1fr) 420px;align-items:center;gap:48px;width:min(960px,100% - 36px);margin:0 auto;padding:72px 0;display:grid}.auth-card{gap:14px;display:grid}.tabs{background:var(--surface-2);border-radius:8px;grid-template-columns:1fr 1fr;gap:8px;padding:6px;display:grid}.tab{min-height:38px;color:var(--muted);background:0 0;border:0;border-radius:7px;font-weight:800}.tab.active{background:var(--surface);color:var(--ink)}label{color:var(--ink);gap:7px;font-size:.9rem;font-weight:800;display:grid}input,select,textarea{border:1px solid var(--line);width:100%;color:var(--ink);background:#fff;border-radius:8px}input,select{min-height:44px;padding:0 12px}textarea{resize:vertical;min-height:320px;padding:14px;font-family:SFMono-Regular,Consolas,monospace;font-size:.9rem;line-height:1.55}.dashboard{grid-template-columns:240px minmax(0,1fr);min-height:calc(100vh - 69px);display:grid}.sidebar{border-right:1px solid var(--line);background:#efebe2;padding:22px}.sidebar nav{gap:6px;margin-top:28px;display:grid}.sidebar a{color:var(--muted);border-radius:8px;padding:10px 12px;font-weight:800;text-decoration:none}.sidebar a.active{background:var(--surface);color:var(--ink)}.main{padding:28px clamp(18px,4vw,42px) 44px}.dashboard-header{justify-content:space-between;align-items:end;gap:18px;margin-bottom:18px;display:flex}.dashboard-header h1{margin-bottom:0;font-size:clamp(2.2rem,4vw,4rem)}.status-pill{border:1px solid var(--line);background:var(--surface);min-height:36px;color:var(--muted);border-radius:999px;align-items:center;padding:0 10px;font-size:.85rem;font-weight:800;display:inline-flex}.dashboard-grid{grid-template-columns:minmax(0,1fr) 320px;width:100%;margin:0}.mission-card{gap:12px;display:grid}.path{flex-wrap:wrap;gap:8px;display:flex}.path span{border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:7px 10px;font-size:.84rem;font-weight:800}.path span.active{border-color:var(--accent);color:var(--accent-dark)}.workbench{gap:14px;margin-top:14px;display:grid}.workbench-head{margin:-18px -18px 0}.board-picker{width:min(290px,100%)}.serial-output{border-radius:8px;min-height:116px;max-height:220px}.stack-grid{grid-template-columns:repeat(4,minmax(0,1fr));width:100%;margin-top:14px}.stack-card{cursor:pointer;min-height:150px}.stack-card.selected{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}.side-card{align-content:start;gap:12px;display:grid}@media (max-width:960px){.hero,.auth-page,.dashboard,.dashboard-grid{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--line)}.sidebar nav{display:flex;overflow-x:auto}.steps,.stack-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:620px){.nav-actions .button:not(.primary){display:none}.hero{padding-top:44px}.steps,.stack-grid{grid-template-columns:1fr}.dashboard-header,.workbench-actions,.summary-row{flex-direction:column;align-items:stretch}.button{width:100%}}
