:root{--color-bg: #ffffff;--color-fg: #1a1a1a;--color-muted: #6b7280;--color-accent: #2d6a4f;--color-accent-dark: #1b4332;--color-border: #e5e7eb;--color-error: #dc2626;--color-success: #16a34a;--radius: 8px;--gap: 12px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0;background:var(--color-bg);color:var(--color-fg);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;height:100%;overscroll-behavior:none}#app{min-height:100vh;max-width:600px;margin:0 auto;padding:16px}h1,h2,h3{margin:0 0 8px}h1{font-size:1.4rem}h2{font-size:1.15rem}h3{font-size:1rem;color:var(--color-muted);font-weight:500}button{background:var(--color-accent);color:#fff;border:none;border-radius:var(--radius);padding:14px 20px;font-size:1rem;font-weight:600;cursor:pointer;width:100%}button:active{background:var(--color-accent-dark)}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{background:transparent;color:var(--color-accent);border:1px solid var(--color-accent)}input{display:block;width:100%;padding:14px;font-size:1rem;border:1px solid var(--color-border);border-radius:var(--radius)}input:focus{outline:2px solid var(--color-accent);outline-offset:-1px;border-color:var(--color-accent)}.card{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);padding:16px;margin-bottom:var(--gap)}.muted{color:var(--color-muted);font-size:.9rem}.error{color:var(--color-error)}.success{color:var(--color-success)}.stack>*+*{margin-top:var(--gap)}