:root{--shell-bg: #081019;--shell-bg-elevated: rgba(11, 16, 24, .9);--shell-bg-panel: #121924;--shell-border-soft: rgba(135, 154, 177, .18);--shell-border-strong: rgba(152, 178, 208, .32);--shell-text: #edf3fb;--shell-text-muted: #98a9bd;--shell-accent: #6dafff}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;min-height:100vh;background:radial-gradient(circle at top center,rgba(49,94,168,.18),transparent 32%),linear-gradient(180deg,#081019,#101722 20%,#171e28);color:#e0e0e0;line-height:1.6}.app-container{min-height:100vh}.app-header{position:sticky;top:0;z-index:100;border-bottom:1px solid var(--shell-border-soft);background:linear-gradient(180deg,#101823f5,#090d14eb);box-shadow:0 16px 38px #0003;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.app-header-inner{max-width:1200px;margin:0 auto;padding:12px 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