:root{--bg-app: #0f172a;--bg-surface: #1e293b;--bg-element-hover: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--accent-color: #3b82f6;--accent-hover: #2563eb;--border-color: rgba(255, 255, 255, .08);--nav-width: 260px;--header-height: 64px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-app);color:var(--text-primary);-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button{background:none;border:none;color:inherit;font:inherit;cursor:pointer}.app-layout{display:flex;height:100vh;width:100vw;overflow:hidden}.main-content{flex:1;display:flex;flex-direction:column;min-width:0;background-color:var(--bg-app)}.page-container{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column}[data-theme=light]{--bg-app: #f8fafc;--bg-surface: #ffffff;--bg-element-hover: #e2e8f0;--text-primary: #0f172a;--text-secondary: #64748b;--accent-color: #2563eb;--accent-hover: #1d4ed8;--border-color: rgba(0, 0, 0, .08)}.modal-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background-color:#000000a6;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:9999;animation:modalFadeIn .2s ease-out forwards}.modal-content{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:12px;width:100%;max-width:420px;box-shadow:0 20px 25px -5px #00000080,0 8px 10px -6px #00000080;overflow:hidden;animation:modalSlideUp .3s cubic-bezier(.16,1,.3,1) forwards}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border-color)}.modal-header h3{font-size:1.1rem;font-weight:600;color:var(--text-primary);margin:0}.modal-close{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;padding:4px;border-radius:6px;transition:all 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.card-header{background-color:#ef44440d;border-bottom-color:#ef444433}.text-danger{color:#ef4444!important}.danger-text{font-size:.9rem;color:var(--text-secondary);line-height:1.5}.btn-destructive{display:flex;align-items:center;justify-content:center;gap:8px;background-color:#ef44441a;color:#ef4444;padding:12px 16px;border-radius:8px;font-weight:500;border:1px solid rgba(239,68,68,.3);transition:all .2s;width:100%}.btn-destructive:hover{background-color:#ef4444;color:#fff}@media(max-width:900px){.settings-grid{grid-template-columns:1fr}}