:root{--brand-primary: #4ea0ff;--brand-primary-dark: #3a8cef;--primary-color: var(--client-primary, var(--brand-primary));--primary-hover: var(--client-primary-dark, var(--brand-primary-dark));--bg-color: #f5f5f5;--surface-bg: #f8f8f8;--surface-alt: #fafafa;--panel-bg: #ffffff;--input-bg: #ffffff;--text-color: #333333;--text-secondary: #555555;--text-muted: #888888;--border-color: #dddddd;--border-faint: #eeeeee;--hover-bg: #f0f0f0;--selected-bg: #e3f2fd;--danger: #e53935;--error-color: #d32f2f;--error-bg: #ffebee;--error-border: #ef9a9a;--success: #2e7d32;--success-bg: #e8f5e9;--dark-surface: #23272f;--dark-surface-2: #2c3444;--dark-text: #ffffff;--dark-text-muted: #9aaabb;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;--shadow: 0 2px 4px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .15);--backdrop-bg: rgba(0, 0, 0, .5);--focus-ring: 0 0 0 2px color-mix(in srgb, var(--primary-color) 25%, transparent)}@media(prefers-color-scheme:dark){:root{--brand-primary: #4ea0ff;--brand-primary-dark: #3a8cef;--bg-color: #1e1e1e;--surface-bg: #252525;--surface-alt: #2a2a2a;--panel-bg: #2d2d2d;--input-bg: #3a3a3a;--text-color: #e0e0e0;--text-secondary: #bbbbbb;--text-muted: #aaaaaa;--border-color: #444444;--border-faint: #333333;--hover-bg: #3a3a3a;--selected-bg: #0a3d7a;--danger: #ff6b6b;--error-color: #ff6b6b;--error-bg: #2d1b1b;--error-border: #7a2e2e;--success: #81c784;--success-bg: #1b3a1e;--shadow: 0 2px 4px rgba(0, 0, 0, .3);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .4);--backdrop-bg: rgba(0, 0, 0, .65)}}button,input,select,textarea{font-family:inherit}.btn-primary,.btn-secondary,.btn-danger{box-sizing:border-box;border-radius:4px;padding:7px 16px;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .15s,border-color .15s,color .15s,opacity .15s}.btn-primary{background-color:var(--primary-color);color:var(--dark-text);border:1px solid 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var(--border-color);border-radius:999px;background:color-mix(in srgb,var(--panel-bg) 90%,transparent);color:var(--text-muted);font-size:11px;font-weight:600;line-height:1.2;text-decoration:none;transition:color .15s,border-color .15s}.portal-brand-link:hover{border-color:var(--primary-color);color:var(--primary-color)}.portal-door-list{width:270px;min-width:270px;display:flex;flex-direction:column;background:var(--panel-bg);border-right:1px solid var(--border-color);overflow:hidden}.portal-door-list__header{padding:16px;border-bottom:1px solid var(--border-color)}.portal-door-list__header h2{margin:0 0 2px;font-size:16px;font-weight:600;color:var(--text-color)}.portal-door-list__header span,.portal-door-list__item-details{color:var(--text-muted);font-size:12px}.portal-door-list__items{flex:1;overflow-y:auto;padding:10px}.portal-door-list__empty{margin:10px 4px;color:var(--text-muted);font-size:13px}.portal-door-list__item{margin-bottom:8px;padding:10px;border:1px solid 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