:root{--font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--accent-color: #3b82f6;--accent-hover: #2563eb}body.light-theme{--bg-color: #f8fafc;--text-color: #0f172a;--text-muted: #64748b;--panel-bg: #ffffff;--panel-border: #e2e8f0;--shadow: 0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px -1px rgba(0, 0, 0, .1);--input-bg: #ffffff;--input-border: #cbd5e1;--card-bg: #f8fafc;--card-border: #e2e8f0;--header-border: #e2e8f0;--theme-btn-bg: #f1f5f9;--theme-btn-active: #ffffff;--theme-btn-active-shadow: 0 1px 2px rgba(0, 0, 0, .05);--btn-secondary-bg: #ffffff;--btn-secondary-border: #cbd5e1;--btn-secondary-text: #334155}body.dark-theme{--bg-color: #090d16;--text-color: #f8fafc;--text-muted: #94a3b8;--panel-bg: #111827;--panel-border: #1f2937;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .2), 0 2px 4px -2px rgba(0, 0, 0, .2);--input-bg: #1f2937;--input-border: #374151;--card-bg: #1f2937;--card-border: #374151;--header-border: #1f2937;--theme-btn-bg: #1f2937;--theme-btn-active: #374151;--theme-btn-active-shadow: 0 1px 2px rgba(0, 0, 0, .3);--btn-secondary-bg: #1f2937;--btn-secondary-border: #374151;--btn-secondary-text: #ffffff}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-color);min-height:100vh;line-height:1.5;transition:background-color .2s ease,color .2s ease}.panel{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:12px;padding:1.75rem;box-shadow:var(--shadow);transition:border-color .2s ease}.btn{font-family:var(--font-family);font-size:.875rem;font-weight:500;padding:.625rem 1.25rem;border-radius:8px;border:1px solid transparent;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;transition:all .15s ease;color:#fff;background:#3b82f6}.btn:hover{background:#2563eb;transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn-success{background:#10b981}.btn-success:hover{background:#059669}.btn-danger{background:#ef4444}.btn-danger:hover{background:#dc2626}.btn-warning{background:#f59e0b;color:#0f172a}.btn-warning:hover{background:#d97706}.btn-info{background:#06b6d4}.btn-info:hover{background:#0891b2}.btn-secondary{background:var(--btn-secondary-bg);border-color:var(--btn-secondary-border);color:var(--btn-secondary-text)}.btn-secondary:hover{background:var(--theme-btn-bg)}.island-anchor{position:relative;display:inline-block;z-index:10}