:root{--accent: #0051FD;--accent-dark: #0040d6;--bg: #f6f7f9;--card: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e6e9ee;--radius: 16px;--shadow: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);--green-bg: #dcfce7;--green-fg: #166534;--yellow-bg: #fef9c3;--yellow-fg: #854d0e;--blue-bg: #dbeafe;--blue-fg: #1e40af;--red-bg: #fee2e2;--red-fg: #991b1b;--gray-bg: #f1f5f9;--gray-fg: #475569}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,IBM Plex Sans Thai,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.5}#root{max-width:560px;margin:0 auto;min-height:100vh}a{color:var(--accent);text-decoration:none}.app-header{position:sticky;top:0;z-index:10;background:var(--card);border-bottom:1px solid var(--border);padding:14px 16px;padding-top:max(14px,env(safe-area-inset-top));display:flex;align-items:center;gap:12px}.app-header 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